NBDE Part 2 2003 Exam
1 Which microbe is least likely to be killed in an autoclave?
a. HIV
b. HBV
c. Streptococcus mutans
d. Bacillus
2 Contaminated sharp must be handles in such ways except for
a. The container must be labeled
b. The container has be non-puncturable
c. The container has be a metal case
d. The container must be closable
3 the closest act the dentist would have for comforting to a patient
a. look in the eye of the patients
b. tap on the shoulder
4 The best way to communicate with patient? talk to the patient while looking into his/her eyes
The patient's sadness can be observed from
a. his words
b. his facial expression
c. his gesture
d. his emotion
5 cranial nerve V2 should be anesthetized intraorally at pterygopalatine fossa
6 which one of the conditions would delay a dentist's decision of taking full mouth X-ray examination
a. pregnancy
b. patient had full mouth examination by X-ray 6 months ago
c. patient will receive radiotherapy next week
d. patient had CT examination last week
7 post operations bleeding-the most likely reason is patient fail to follow post-operation instruction
8 Nasopalatine duct cyst a. is located at midline between 2 central incisors
b. the pulp testing would differentiate it from periapical cysts
9 a patient had mandibular fracture quite some time ago and now have a painful movable tender mss in the
old fracture area near the mental foramen it is a traumatic neuroma
10 probing depth differs depending on
a. inflammation of the tissue
b. force used for probing
c. if probing depth decrease, it may be due to reduction of inflammation and swelling, not due to real regain
of attachment
11 if a patient does not have enough posterior inter-arch space for both maxillary and mandibular dentures
fabrication, it is necessary to
Perform a tuberosity operation
12 the function of post
a. provide retention for a crown
b. enhance the strength of the tooth
c. provide retention for a core
d. provide the root canal sealing
13 standard root canal treatments requires a dentist to perform the treatment until
a. CEJ
b. DCJ
c. DEJ
14 If during the root canal treatment, the dentist breaks the apical seating and extrude the file over the
foramen
a. fill the canal with a master file of a larger number then master cone
b. increase the size of the file and re-create a new apical seat and then fill with the master cone of that size
c. try to fill in as many Gutta percha points as possible
d. use canal medication instead of filling
15 what age does a child completes its primary dentition to occlusion
a. at birth
b. 6 months
c. 11/2 years old
d. 21/2 years old
16 how old does a child/infant start to show the first sign of the primary dentition
prenatal in the uterus at 6 weeks
17 if a dentist want to check if the patient's mandible has suffered from fracture or not, what is the best
indication?
occlusion and arch continuity
18 what is the best timing for prforming incision and drainage at an area of infection
a. when the swelling is hard and diffuse
b. when the area is the most painful
c. when the area is large
d. when the swelling is localized and fluctuant
19 if removal of torus must be performed to a patient with full-mouth dentition, where should the incision
be made
a. right on the top of the torus
b. at the base of the torus
c. midline of the torus
d. from the gingival sulcus of the adjacent teeth
20 where is the an allograft from
a. freeze dried human bone graft
b. freeze dried bovine bone graft
c. hydroxyappatite
d. Cancellous bone of the patient himself
21 if an autogenous bone graft was placed within a mandibular bone cavity, after one year, where is the
bone from within this cavity
a. from the autogenous bone cells
b. from the peripheral cancellous bone
c. mostly from the autogenous bone cells, only the periphery is from the cortical bone places of the cavity
22 enamel pearls happen mostly at which teeth
a. maxillary molars
b. mandibular molars
c. primary molars
d. incisors
23 the prognosis for a mesio-distal furcation involvement of maxillary first premolars is general good.
After proper treatment, this tooth can be used for an abutment of a posterior bridge
a. both statements are correct
b. the first statement is correct but not the second
c. the first statement is wrong, but second statement is correct
d. both statements are wrong
24 after implant placement, an edentulous patient should
a. avoid wearing anything for 2 weeks
b. immediately have healing abutments placed over the implants
c. should wear an immediate denture to protect the implant sites
25tissue conditioner is used for treating
a. inflammatory papillary hyperplasia
b. Epulis fissuratum
c. traumatized mucosa
c. rocking denture stabilization
26 if during a recall of a patient who wears RPD, the dentist finds that the indirect retainer and the rests
would be lifted if he press on the edentulous area of this RPD, what should the dentist do
a. tell the patient that he needs a new denture
b. relining the denture
c. Occlusal adjustment
27 after perio surgery, the re-attachment can happen
a. as soon as in a week
b. to the dentin or cementum
28 scaling can be done on
a. only enamel but not root surface
b. both enamel and root surface
c. only root surface
29 there are more detached plaques within supragingival plaques that subgingival plaques. The detached
plaques within subgingival area are the ones that are more toxic to tissue than attached plaques.
a. both statements are correct
b. the first statement is correct but not the second
c. the first statement is wrong, but second statement is correct
d. both statements are wrong
30 the fact that patient can decide for himself for the treatment and that
the dentist would respect the
patient's wills is called
autonomy
31 Moyer's analysis is to know
predict the size of unerupted canine and premolars
by using mandibular incisors
32 where is primate space
maxillary: between lateral incisor and canine
mandibular: between canine and first molar
33 when should the posterior cross bite be corrected
a. ASAP
b. when until permanent dentition has fully developed
c. during early mixing dentition
d. during late mixing dentition
34 which one of the following is not the effect of epinephrine
a. increase of heart rate
b. increase of blood pressure
c. bronchoconstriction
d. vasoconstriction
35 beside inadequate irrigation, what else can be the reason for a dentist to fail to remove totally the canal
necrotic tissue?
a. failure to use intra-canal medication
b. failure to remove periapical tissues
c. lack of straight-line access
36 beside drainage, what else should be done for a patient with acute pulpitis
a. antibiotics prescription
b. analgesics
c. removal and debridement of canal therapy
37 N2O is contraindicated in patients who have
a. leukemia
b. drug abuse
c. mild-moderate asthma
d. dental anxiety
38 TMD patients usually have
a. psychosis
b. antisocial tendency
c. Schizotypical character
d. drug abuse
39 what does perforation tend to happen at maxillary first premolar during access opening of a root canal
therapy
there is a mesial concavity
40 why is Z-plasty preferred over diamond technique for frenum detachment
a. less scar contraction
b. easier in terms of technique
c. less incision needed, no suture needed
41 if a child has diastema of 2mm at the age of 8
a. it can be a normal condition
b. it is caused by heavy frenum
c. the child needs orthodontic treatment right the way
42 1 week after multiple extraction and alveoloplasty, the patient returns with a swelling at the ridge area.
The patient does not have fever, nor in pain. The swelling extends to mucogingival fold with fluid inside.
X-ray shows that there are spicules within the swelling. What should the dentist do
a. prescribe antibiotics and observe for a week
b. prescribe analgesics
c. surgically drain the swelling and remove the bone spicules
42 a patient who suffers from insulin shock turns unconscious. What should the dentist do?
a. IV injection of 5% dextran water
b. IV injection of 50% dextran water
c. feed patient with sugar good
43 in order to give a patient an incisor with younger look, what can the dentist do?
a. straighten incisor edge
b. rounding incisor edge
c. move the line angles proximally
d. move height of contour gingivally
44 inadequate attached gingiva without any periodontal symptom or sign
no treatment is necessary
45 histologically, aspirin burn is
a. hyperkeratosis
b. dysplasia
c. mucosal necrosis
46 what is the purpose of leveling the curve of Spee
a. correct open bite
b. correct deep bite
c. correct angulation of the teeth
d. change arch diameter
47 palatal expansion device does not need a labial bow because
a. labial bow is not rigid enough
b. labial bow would limit the expansion effect
c. labial bow is not functional in this case
48 what effect does a cervical pull headgear has on the maxillary teeth
a. extrusion and distal movement
b. intrusion and distal movement
c. extrusion and mesial movement
d. intrusion and mesial movement
49 most of the time, what type of force can a removable appliance provide?
a. intrusion
b. extrusion
c. tipping
d. torquing
e. translation
50 what is the definition of total anterior facial height on a cephalograph
a. nasion-menton
b. ANS-menton
c. A-menton
d. A-B
51 what are A and B point on a cephalograph
52 what is the most likely cause of a premature exfoliation of primary canine
inadequate arch space
53 when there is a premature loss of primary mandibular second molars, the permanent mandibular first
molar usually change the path of eruption by erupting mesially-what is the cause of change of the eruption
a. occlusion
b. pathological
c. mesial drifting
54 what happen if there is a premature exfoliation of a mandibular primary canine
the mandibular incisors would move distally and lingually
decrease arch length
shift midline to affect side
need space maintainer
55 what happens with intercanine distance after mixed dentition
a. increased
b. decreased
c. stable, no change
56 after the age of 6, where does the mandibular growth of a child mostly happens
posterior to the second molars
57 where is the maxillary growth center
maxillary tuberosity
58 if there is no succedaneous tooth, a primary tooth would absorb
a. more slowly
b. more quickly
c. would not resorb at all
59 a patient who works at a nuclear power plant wears a work badge for detecting exposed amount of
radiation annually. When he comes to see a dentist, what is the most likely reason that he does not need to
wear his badge during the dental X-ray examination
a. dental x-ray is too small amount for the badge
b. the badge only detects exposed amount at work, the dental X-ray does not include in his work
environment dose
c. the badge detects gamma ray, not X-ray
60 if there is radiation exposure of 4 Gy on the arm, what is the likely reaction
a. erythema
b. bone marrow depression
c. vascular shrinkage
61 which cells are the most sensitive to radiotherapy
a. hematopoietics
b. GI mucosa
c. muscle
d. adult brain cells
62 upper limb IV injection, the most likely problem is
a. Phlebitis
b. intra-arterial injection
c. vascular breakage
63 a child asking repetitive and persistent questions are most likely
a. very curious about the treatment
b. trying to delay the treatment
c. hyperkinetic
d. audistic
64 the problem that dentists encounter the most during treatment of audistic children is
lack of communication
65 what kind of disease would result a patient to have osteoma and multiple intestinal polyposis
Gardner’s syndrome
66 polyposis perioral pigmentation
Peutz-Jeghers
67 a patient who has multiple odontokeratocysts in the jaw and dermal pigmented macules on the back,
cyst lesion on the skin should be suspected to have
basal cell nevus syndrome
68 which syndrome would have the triad of diabetes insipidus, exophthalmos multiple bone lesion
Langerhans cell histiocytosis
69 to differentiate cement dysplasia from a periapical cyst
a. pulp testing
b. probing
c. X-ray
70 which of the following would cause malaise and fever on a patient
a. acute periodontal abscess
b. acute pulpitis
c. chronic pulpitis
d. acute periodontitis
71 aspirin stops pain by
a. stopping the upward transduction of pain signal in the spinal cord
b. stopping the signal transduction in the cortex
c. interfere with signal interpretation in the CNS
d. stopping local signal production and transduction
72 the following are the natural endorphins except
a. enkephalin
b. endorphin
c. dynorphin
d. bradykinin
73 what is the action of morphine for pain relief
mimicking body endorphin system
74 which one of the following does not have anti-inflammatory reactions
acetaminophen only, all NSAID have anti-inflammatory
75 periodontal disease can be caused by all of the followings except
a. poor oral hygiene
b. heavy dental plaque
c. faulty prosthesis
d. DM
76 which of the following materials is very hard to remove from patient's mouth
a. alginate
b. polyether
c. polysulfide
d. silicone
77 which one of the followings is not a characteristics of additional type silicone
a. impression must be poured right away because alcohol would vaporized and result in distortion
b. very stable, can be stored for more than a week
c. can have multiple pours
d. high accuracy
e. may release H2 in some materials
78 GIC is composed of
aluminosilicate+polyacrylic acid
79 the best and the most effective way to remove stained mottled enamel
a. home bleaching
b. microabrasion technique
c. office bleaching
d. walking bleaching
80 what is a microabrasion technique
intrinsic stain can be caused by
porphyria
81 the followings have additive action for each component when used together, except for one, what is the
exception
a. Atropine+glycopyrolate (anticholinergic)
b. aspirin acetaminophen
c. penicillin tetracycline
82 what is the maximal concentration used for N2O sedation?
a. 5%
b. 10%
c. 50%
d. 80%
83 patients who have nausea and vomit during N2O sedation usually
a. are allergic to N2O
b. inhale too high concentration of N2O
c. eat a big meal right before the procedure
84 what is the % of US population who sees a dentist each year?
what is the best sedative medication in a dental office setting
a. phenobarbital
b. morphine
c. N2O
85 what are the schedule II drugs?
during fabrication of pediatric SSC, which surface of the tooth requires the least reduction
a. facial
b. lingual
c. proximal
d. they all need the same amount of reduction
86 ataxic epilepsy patients-what are their most common dental problem
a. adontia
b. malocclusion
c. trauma
d. gingival hyperplasia due to medication
87 what is the optimal incisal reduction of anterior porcelain fused to metal crown
a. 1mm
b. 1.5mm
c. 2.0mm
d. 2.5mm
88 porcelain veneer-what is the most important advantage
compared with porcelain veneer, what is the most important advantage of resin veneer
a. esthetic
b. cost
c. tooth preservation
89 compared with class II plaster, which one of the following is NOT the characteristics of die strength
a. better compression strength
b. better tensile strength
c. require less water
d. higher expansion
90 which of the followings is not an advantage of resin based GIC over water based GIC?
a. better Fluoride release
b. better bonding
c. better esthetic
d. easier for manipulation
91 what is the characteristics of an implant that would change bony resorption pattern
a. intraosseous integration
b. integrate with bone
92 what are the recommended numbers of implants for complete edentous patients
a. maxilla 1 mandibular 1
b maxilla 3 mandibular 2
c. maxilla 6 mandibular 4
d. maxilla 8 mandibular 6
93 what is the term that describe the number of the cases of a disease divided by the population
a. incidence
b. ratio
c. prevalence
94 what is median of 10 20 20 20 30 35 40 40 50 50 60
apically positioned flap is almost impossible to perform on
a. maxillary buccal area
b. maxillary lingual area
c. mandibullar lingual area
d. mandibular buccal area
95 in order to increase the success rate of treating local juvenile periodontitis, what should be done
a. combine usage of systemic antibiotic
b. local antibiotic treatment
c. use of chlorhexidine
96 class II amalgam cavity preparation, what is the purpose of breaking up contact at the gingival
cavosurface? What is the purpose of placing retention grooves, and where do you place these grooves?
97 which feature provide the BOND onlay the most retention?
98 which drugs have active metabolites that would prolong its effect?
Diazepam, chlordiazepoxide (all choice are narcotics)
99 when a child loses its primary second molar before permanent first molar eruption, what is the choice of
space maintainer?
a. lingual holding arch
b. band and loop
c. distal shoes
d. Nance appliance
100 A black male with erosive lips, erythematous and blisters on his lips, the description says that he also
have palmar and planta erosion and blisters, what is this syndrome?
a. lichen planus
b. erythema multiform
c. pemphigus vulgaris
d. pemphigoid
101 white macule on the floor of the mouth, bilateral, what is most likely diagnosis?
an old male came to the clinic with pain and swelling on the left side of mandible. The patient mentioned
that he had extractions a few mouth ago and the healing was not going well. In X-ray shows cotton wool,
ground glass radio-opacity lesion at the left side of the mandible, the bone margines is diffuse and nonclear.
large area is involved and there is no definite margin.
chronic osteomyelitis
102 a child comes to the clinic with pain at the mandible. The X-ray shows sunflower outgrowth of bone
spicules
osteosarcoma
103 which component in local anesthesia causes the most toxic effects in clinical situations?
a. vasoconstrictor
b. local anesthesia
c. preservatives
104 what are the systemic effect of lidocaine and epinephrine
105 when pKa increases for the same lidocaine, what happens to its effect?
local anesthetics with a pKa closer to the physiologic pH will have higher concentrations of the non-ionized
base (lipid soluble) form pass into the nerve cell resulting in a more rapid onset of action
106 the percentage of specific LA which is present in the base form when injected in tissue whose pH is 7.4
is inversely proportional to the pKa of that agent
a. onset is faster, duration is longer
b. onset is slower, duration is longer
c. onset is the same, duration is the same
d. onset is slower, duration is the same
107 why should the wax pattern be washed by soap water before it is invested
increase surface wetting ability
a child with post operational lip swelling is most likely to have
a. allergy to the local anesthesia
b. bitten on his lip
c. accidental vascular injection
108 which local anesthesia can be used as a topical anesthesia as well
a. lidocaine
b. bupivacaine
c. Polocaine
109 which antibiotics should a patient take who needs premedication prophylaxis and who is allergic to
penicillins according to the American heart association 1997 recommendation?
clindamycin 600mg
a tongue with a smooth pink swelling on the dorsum
a. a neuroma
b. a neurofibroma
c. a fibroma
110 what is the most likely post operative side effect of bilateral sagittal split osteotomy
a. instability
b. nerve damage
c. devitalization of teeth
d. relapse
111 which nerve would the ramus split osteotomy most likely damage?
for extracting of third molar, the following conditions would make the operation easier, except?
a. elastic bone
b. conical roots
c. soft tissue impaction
d. space within tooth bud is small
112 what kind of question would be an open-ended question?
what is the most used trigeminal neuralgia medication?
a patient who is taking dicumarol has most likely a history of
a. angina
b. coronal infarct
c. congestive heart failure
d. corp pulmonale
113 what is the common sign for all kinds of shocks?
lack of perfusion
what is the first sign of a patient who is suffering from insulin shock?
a. pallor
b. shaking
c. sweating
d. nervousness
114 in which areas should scalloping be reduced in periodontal surgery?
anterior esthetic region
115 what is the best sign for success of apexogenesis
continuous completion of apex
116 what kind of procedure should be performed on a tooth with necrotic pulp and unfinished root tip
a. apexogenesis
b. apexification
c. pulpotomy
d. pulpectomy
117 which type of syncope is most common in dental office
a. hypovolemic
b. psychogenic
c. posture
118 when parents insist on entering the dental office with the child, the child's behavior is usually
a. worse
b. better
c. depending on the parent's behavior
119 the toxic effect of sulf ram is produced by which of its metabolites?
a. acetyl aldehyde
b. formaldehyde
c. glutaraldehyde
120 during injection of superior posterior alveolar nerve, a swelling suddenly occurs, what most likely
happen? what is the treatment of this?
121 which one of the injections most likely have positive inspiration?
a. IA 10-15%
b. akisino
c. infraorbital
d. Gow-Gate 2%
e. mental nerve
122 which of the following drugs would produce gingival hyperplasia and immuno depression?
a. nifedipine
b. cyclosporin
c. phenytoin
123 a child who is having leukemia treatment most likely have the infection of
a. histoplasmosis
b. candidiasis
124 what is the most definite way to differentiate ameloblastoma, and odontogenic keratocyst?
a. smear cytology
b. reactive light microscopy
c. reflective microscopy
125 what is the most likely diagnosis of a soft tissue lesion that is fixed at the margines
a. infection
b. malignancy
c. begin tumor
126 what is the cyst that has lymphoid tissue and epithelioid cells?
lymphoepithelioid cysts
127 what is the most likely sign of neoplasm?
a. metaplasia
b. anaplasia
c. aplasia
128 what is the Bennett angle?
129 when the dentist inserts in new complete denture in a patient's mouth, there is obvious occlusal
disharmony. What is the most likely cause?
a. initial vertical dimension
b. the casts were mounted at the wrong hinge axis
130 a dentist who uses 5-HEMA for clinical situations most likely experiences which of the following
conditions for the clinician?
a.contact dermatitis
b. arthritis
c. arthus reaction
d. delayed hypersensitivity
d. anaphylaxis
131 if upper anterior teeth are placed too anteriorly and superiorly in a complete denture, the patient would
have difficult pronouncing
a. v/f sound
b. t/d sound
c. s/th sound
d. j/ch sound
132 what was done wrong that the resin teeth won't stay with resin denture base?
a. retentive holes are not big enough
b. there is no locking system
c. wax got in between during processing
133 what is purpose of beveling at MON cavosurface?
for a patient with a faulty amalgam restoration, replacement with casting inlay/onlay might be better
because
a. better adaptation
b. better retention
c. better proximal contour
134 when restoration material is resin, which kind of base material should be avoided?
a. zinc phosphate
b. zinc oxide eugenol
c. glass ionomer cement
d. resin modified GIC
135 why is it that, during mixing cement, the liquid part is not taken out of its container right before
mixing?
a. the liquid would spread widely
b. keep it cool in its container
c. prevent loss of volatile materials
136 red erosion at gingiva, buccal mucosa, tongue
erosive lichen planus
a dental patient with type 1 DM should
a. delay both his insulin shot and food intake until dental procedure completed
b. eat prior to dental procedure, delay his insulin shot until procedure is over
c. eat and have the insulin shot prior to dental procedure
137 a 5 years old child who lives in a community with water fluoridation of 0.75ppm should have
supplemental F intake of
a. 0mg
b. 0.25mg
c. 0.5mg
d. 1mg
138 the best concentration of APF for clinical use
a. 5%
b. 1 %
c. 0.5%
d. 1.23%
d. 3.2%
139 0.5 oz chlorhexidine equals how much of ml chlorhexidine?
140 which field of following can be a specialty according to ADA
a. public health
b. cosmetic dentistry
c. hospital dentistry
d. geriatric dentistry
141 what are the most abundant cells in crevicular fluid in gingivitis and periodontitis?
a. mast cells
b. neutrophils
c. plasma cells
d. basophiles
142 which kind of parents can not be treated with b-blocker as anti-arrithymic medication
a. patients with angina
b. patients with hypertension
c. patients with asthma
d. patient with COPD
143 which one of the following is the most important factor for providing retention cor complete denture
a. cohesion
b. adhesion
c. peripheral seal
144 what are the two most important factors for retention for complete denture?
peripheral seal
intimate tissue contact
145 what is the reason that a patient complains of lower complete denture "popping up" all the time
a. lack of retention
b. over-extention
c. under-extention
d. deflective occlusion
146 what is the cause of epulis fissuratum
a. unstable denture
b. under extention
c. over extention
d. traumatic occlusion
147 a patient complains that his TMJ would pop upon opening and click during closing. What is the likely
diagnosis
a. ankylosis
b. reciprocal clicking
c. arthritis
148 what are the muscle that determine the lingual border of a mandibular complete denture
glossopalatal, mylohyoid, geniohyoid
149 which gland is the one that most likely to have sialolith
a. submental
b. submandibular
c. parotid
d. palatal mucus gland
150 which intra-oral site is the most common site of melanoma
a. buccal mucosa
b. gingiva
c. hard palate
d. floor of mouth
e. tongue
151 when observing an amalgam filling, the dentist found that there is proximogingival angle deficiency,
what is likely to be the main cause of this
a. a. inadequate wedging
b. matrix not well adapted
c. too large an initial amount of amalgam added to the cavity
152 which type of amalgam needs larger condensers and lateral condensation?
a. admixed
b. lathe-cut
c. spherical
d. conventional
e. high copper type
153 which metal element of cobalt chromium alloy would provide the anti-corrosion property
a. cobalt
b. chromium
c. both
d. neither
154 due to the mesial concavity of the maxillary first premolar, prior to condensation of the amalgam, the
tooth is best prepared with
a. wedge only
b. matrix only
c. no wedge nor matrix needed
d. custom made wedge+matrix
155 which one of the teeth has the most consistent canal
a. mandibular incisor
b. mandibular premolar
c. maxillary canine
d. maxillary premolar
e. mandibular molar
156 maxilla lateral incisor root tip usually tips to
a. palatal
b. facial
c. mesial
d. distal
157 which one of the following teeth has a triangular canal shape?
maxillary central incisor
158 what is the pupl chamber shape of a mandibular first molar with 4 canals
a. trapezoidal
b. triangular
c. square
d. oval
e. ellipse
159 which one of the following can not be observed on X-ray
a. canal calcification
b. root buccal curvature
c. canal numbers
d. the apical condition
160 parallel technique in X-ray taking follows many of the rules to optimize the resultant image except for
one, what is this rule?
a. keep the film and the target tooth as parallel as possible
b. the incomingcentral ray should be perpendicular to the film and the target tooth
c. the film should be placed as far to the source of X-ray as possible
d. the target tooth and film sould be as close as possible.
161 when the electrons hit the anode from the cathode in an X-ray machine, where does most of the energy
turn into
a. X-ray
b. Heat
c. light
d. Gamma ray
e. no loss of energy
162 on a panoramic radiograph there is a soap bubble appearance bilaterally in region of the angle the
mandible. The condition most likely is
a. ameloblastoma
b. cherubism
c. ameloblastic fibroma
d. fibrous dysplasia
163 radiographically there is a widening of the periodontal ligament space around all the teeth. What is
your initial diagnosis
a. earliest sign of osteosarcoma
b. scleroderma
c. hyperparathyroidism
d. fibrous dysplasia
164 how will you treat a tooth that has been fracture below the alveolar bone level
a. wait for it to erupt
b. extract
c. endodontically fill the tooth and place a post and core
165 which nerve may be injury when giving a patient an injection in the buttocks
a. femoral
b. sciatic
c. gastrocnemius
166 what will make you suspect that a patient has nursing bottle caries
a. caries buccally on mandibular anterior teeth
b. caries buccally on maxillary anterior teeth
167 the apical foramen most often exist the root
a. at the anatomic apex
b. 0.5 mm from apex
c. less than 0.5mm from the apex
168 the tube of the dental x-ray machine is surrounded by
a. vacuum
b. oil
c. helium
169 best way of image TMJ
a. pan
b. MRI
c. transcranial
d. CT
170 with which local anesthetic injection is one likely to produce a hematoma
a. mandibular nerve block
b. posterior superior alveolar nerve block
c. anterior superior alveolar nerve injection
d. middle superior alveolar nerve injection
171in making radiographs, which of the following controls the mean energy of the x-ray
a. mA
b. kVp
c. focal spot size
d. exposure time
172 what condition is contraindicated to elective root canal therapy
a. AIDS
b. recent MI
c. leukemia
d. radiotherapy
e. 2nd trimester pregnancy
173 which organism is involved with periodontal disease
a. P. gingivalis
b. E species
c. bacterioids
d. C. rectus
e. all of the above
174 a new patient informs you that he is taking dicumarol daily, what test result will you request to see
a. PPT
b. PT
c. CBC
d. blood chemistry
175 which nerve is involved with a Le Forte II fracture
a. greater palatine
b. infra orbital
c. nasopalatine
d. posterior superior
176when moving tooth orthodontically where is the center of resistance
a. at cervical margin
b. half way down the root
c. at apex
d. 2/3 up from the apex
177 if SNA is 82 and the patient is 90 what is increase
a protrusive mandible
b. protrusive maxilla
c. retrusive mandible
d retrusive maxilla
178 a patient has MOD amalgam placed 3 weeks ago and the patient complains of pain with heat since
restoration was placed. How will you treat this patient
a. wait another 3 weeks
b. endo
c. extract
d. place a sedative restoration
179 what is cement of choice for composite inlays
a. zinc phosphate
b. resin cements
c. polycarboxylate
180 what percent of lower molar first molar have 4 canals
a. 15%
b. 35%
c. 55%
d. 2%
e 25%
181 a 9 years old girls tells you that “my mom I nagging me all the time to brush my teeth” what should
you say in response
a. would not say anything
b. clean teeth are healthy teeth
c. if you do not brush your teeth they will fill out
d. I see that you are having a problem with your Mom
182 what is most likely site to perforate when making access for RCT on a tooth #8
a. distal
b. facial
c. lingula
d. mesial
183 with a modified Widman flap you mostly reduce bone by
a. adapt the flap margin
b. osseous restructuring
c. removal of infected osseous tissue
d removal of malignancy tissue
184 why do clinical remount
a. adaptation of trial bases and CD are different
b. compensate for VDO
c. compensate for improper face bow transfer
185 all are true for a composite inlay except
a. rounded internal line
b. margin in enamel
c. cavosurface bevel
186 finding the juvenile periodontitis
a. margination of the teeth
b. leukopenia
c. leukocytosis
187 which best describes the interpersonal distance zone in which dentist usually treat their patient
a. social
b. intimate
c. public
d. personal
188 the treatment of choice for an 8 years old patient who has a 1 mm intrusion of the permanent lateral
maxillary incisor is
a. extract the tooth
b. allow the tooth to re-erupt
c. perform pulpotomy
d. splint the tooth for 10 days
189 biotransformation is all except
a. conjugation
b. covalent bond
c. hydrolysis
d. oxidation
190 when diazepam and atropine are administered together everything happens except
a. sedation
b. analgesia
c. relaxation
191 principle for occlusal-lingual amalgam preparation
a. retained by occlusal prep
b. self retentive immediately past where grooves coalesce
c. sharp retention
d. cavosurface bevel
192 radiographic sign of trauma from occlusion include each of the following except one, which one is this
exception
a. hypercementosis
b. root resorption
c. alteration of the lamina dura
d. alteration of the periodontal ligament
e. vascular infiltration of the periodontal ligament
193 which of the following properties of sodium hypochlorite most undesirable
a. smell
b. toxicity to viral dentin
c. tendency to bleach dentin
d. corrosive actin on endodontics files
e. reaction with chelating agents
194 what is activity of caries if seal off with restoration
a. regresses
b. no activity
c. increase
195 the most frequent site where pain radiate to ear
a. mandibular premolar
b. mandibular molar
c. maxillary molar
d. maxillary premolar
196 therapeutic index of a drug indicates the relative
a. efficacy
b. potency
c. safety
d. duration
e. solubility
197 when does cleft palate deformity occur during pregnancy
a. middle trimester
b. first trimester
c. third trimester
d. at a difficult delivery
198 all are advantage of hybrid ionomer except
a. esthetics
b. bond strength
c. wear resistance
d. coefficient of thermal expansion
199 to correct a posterior cross bite the attachment must be placed on
a. labial of maxillary and labial of mandibular teeth
b. lingual maxillary and labial of mandibular teeth
c. palatal f maxillary and labial of mandibular teeth
200 the majority of cell in dental pulp are
a. nerve cell
b. fibroblasts
c. Blood vessels
1 Which microbe is least likely to be killed in an autoclave?
a. HIV
b. HBV
c. Streptococcus mutans
d. Bacillus
2 Contaminated sharp must be handles in such ways except for
a. The container must be labeled
b. The container has be non-puncturable
c. The container has be a metal case
d. The container must be closable
3 the closest act the dentist would have for comforting to a patient
a. look in the eye of the patients
b. tap on the shoulder
4 The best way to communicate with patient? talk to the patient while looking into his/her eyes
The patient's sadness can be observed from
a. his words
b. his facial expression
c. his gesture
d. his emotion
5 cranial nerve V2 should be anesthetized intraorally at pterygopalatine fossa
6 which one of the conditions would delay a dentist's decision of taking full mouth X-ray examination
a. pregnancy
b. patient had full mouth examination by X-ray 6 months ago
c. patient will receive radiotherapy next week
d. patient had CT examination last week
7 post operations bleeding-the most likely reason is patient fail to follow post-operation instruction
8 Nasopalatine duct cyst a. is located at midline between 2 central incisors
b. the pulp testing would differentiate it from periapical cysts
9 a patient had mandibular fracture quite some time ago and now have a painful movable tender mss in the
old fracture area near the mental foramen it is a traumatic neuroma
10 probing depth differs depending on
a. inflammation of the tissue
b. force used for probing
c. if probing depth decrease, it may be due to reduction of inflammation and swelling, not due to real regain
of attachment
11 if a patient does not have enough posterior inter-arch space for both maxillary and mandibular dentures
fabrication, it is necessary to
Perform a tuberosity operation
12 the function of post
a. provide retention for a crown
b. enhance the strength of the tooth
c. provide retention for a core
d. provide the root canal sealing
13 standard root canal treatments requires a dentist to perform the treatment until
a. CEJ
b. DCJ
c. DEJ
14 If during the root canal treatment, the dentist breaks the apical seating and extrude the file over the
foramen
a. fill the canal with a master file of a larger number then master cone
b. increase the size of the file and re-create a new apical seat and then fill with the master cone of that size
c. try to fill in as many Gutta percha points as possible
d. use canal medication instead of filling
15 what age does a child completes its primary dentition to occlusion
a. at birth
b. 6 months
c. 11/2 years old
d. 21/2 years old
16 how old does a child/infant start to show the first sign of the primary dentition
prenatal in the uterus at 6 weeks
17 if a dentist want to check if the patient's mandible has suffered from fracture or not, what is the best
indication?
occlusion and arch continuity
18 what is the best timing for prforming incision and drainage at an area of infection
a. when the swelling is hard and diffuse
b. when the area is the most painful
c. when the area is large
d. when the swelling is localized and fluctuant
19 if removal of torus must be performed to a patient with full-mouth dentition, where should the incision
be made
a. right on the top of the torus
b. at the base of the torus
c. midline of the torus
d. from the gingival sulcus of the adjacent teeth
20 where is the an allograft from
a. freeze dried human bone graft
b. freeze dried bovine bone graft
c. hydroxyappatite
d. Cancellous bone of the patient himself
21 if an autogenous bone graft was placed within a mandibular bone cavity, after one year, where is the
bone from within this cavity
a. from the autogenous bone cells
b. from the peripheral cancellous bone
c. mostly from the autogenous bone cells, only the periphery is from the cortical bone places of the cavity
22 enamel pearls happen mostly at which teeth
a. maxillary molars
b. mandibular molars
c. primary molars
d. incisors
23 the prognosis for a mesio-distal furcation involvement of maxillary first premolars is general good.
After proper treatment, this tooth can be used for an abutment of a posterior bridge
a. both statements are correct
b. the first statement is correct but not the second
c. the first statement is wrong, but second statement is correct
d. both statements are wrong
24 after implant placement, an edentulous patient should
a. avoid wearing anything for 2 weeks
b. immediately have healing abutments placed over the implants
c. should wear an immediate denture to protect the implant sites
25tissue conditioner is used for treating
a. inflammatory papillary hyperplasia
b. Epulis fissuratum
c. traumatized mucosa
c. rocking denture stabilization
26 if during a recall of a patient who wears RPD, the dentist finds that the indirect retainer and the rests
would be lifted if he press on the edentulous area of this RPD, what should the dentist do
a. tell the patient that he needs a new denture
b. relining the denture
c. Occlusal adjustment
27 after perio surgery, the re-attachment can happen
a. as soon as in a week
b. to the dentin or cementum
28 scaling can be done on
a. only enamel but not root surface
b. both enamel and root surface
c. only root surface
29 there are more detached plaques within supragingival plaques that subgingival plaques. The detached
plaques within subgingival area are the ones that are more toxic to tissue than attached plaques.
a. both statements are correct
b. the first statement is correct but not the second
c. the first statement is wrong, but second statement is correct
d. both statements are wrong
30 the fact that patient can decide for himself for the treatment and that
the dentist would respect the
patient's wills is called
autonomy
31 Moyer's analysis is to know
predict the size of unerupted canine and premolars
by using mandibular incisors
32 where is primate space
maxillary: between lateral incisor and canine
mandibular: between canine and first molar
33 when should the posterior cross bite be corrected
a. ASAP
b. when until permanent dentition has fully developed
c. during early mixing dentition
d. during late mixing dentition
34 which one of the following is not the effect of epinephrine
a. increase of heart rate
b. increase of blood pressure
c. bronchoconstriction
d. vasoconstriction
35 beside inadequate irrigation, what else can be the reason for a dentist to fail to remove totally the canal
necrotic tissue?
a. failure to use intra-canal medication
b. failure to remove periapical tissues
c. lack of straight-line access
36 beside drainage, what else should be done for a patient with acute pulpitis
a. antibiotics prescription
b. analgesics
c. removal and debridement of canal therapy
37 N2O is contraindicated in patients who have
a. leukemia
b. drug abuse
c. mild-moderate asthma
d. dental anxiety
38 TMD patients usually have
a. psychosis
b. antisocial tendency
c. Schizotypical character
d. drug abuse
39 what does perforation tend to happen at maxillary first premolar during access opening of a root canal
therapy
there is a mesial concavity
40 why is Z-plasty preferred over diamond technique for frenum detachment
a. less scar contraction
b. easier in terms of technique
c. less incision needed, no suture needed
41 if a child has diastema of 2mm at the age of 8
a. it can be a normal condition
b. it is caused by heavy frenum
c. the child needs orthodontic treatment right the way
42 1 week after multiple extraction and alveoloplasty, the patient returns with a swelling at the ridge area.
The patient does not have fever, nor in pain. The swelling extends to mucogingival fold with fluid inside.
X-ray shows that there are spicules within the swelling. What should the dentist do
a. prescribe antibiotics and observe for a week
b. prescribe analgesics
c. surgically drain the swelling and remove the bone spicules
42 a patient who suffers from insulin shock turns unconscious. What should the dentist do?
a. IV injection of 5% dextran water
b. IV injection of 50% dextran water
c. feed patient with sugar good
43 in order to give a patient an incisor with younger look, what can the dentist do?
a. straighten incisor edge
b. rounding incisor edge
c. move the line angles proximally
d. move height of contour gingivally
44 inadequate attached gingiva without any periodontal symptom or sign
no treatment is necessary
45 histologically, aspirin burn is
a. hyperkeratosis
b. dysplasia
c. mucosal necrosis
46 what is the purpose of leveling the curve of Spee
a. correct open bite
b. correct deep bite
c. correct angulation of the teeth
d. change arch diameter
47 palatal expansion device does not need a labial bow because
a. labial bow is not rigid enough
b. labial bow would limit the expansion effect
c. labial bow is not functional in this case
48 what effect does a cervical pull headgear has on the maxillary teeth
a. extrusion and distal movement
b. intrusion and distal movement
c. extrusion and mesial movement
d. intrusion and mesial movement
49 most of the time, what type of force can a removable appliance provide?
a. intrusion
b. extrusion
c. tipping
d. torquing
e. translation
50 what is the definition of total anterior facial height on a cephalograph
a. nasion-menton
b. ANS-menton
c. A-menton
d. A-B
51 what are A and B point on a cephalograph
52 what is the most likely cause of a premature exfoliation of primary canine
inadequate arch space
53 when there is a premature loss of primary mandibular second molars, the permanent mandibular first
molar usually change the path of eruption by erupting mesially-what is the cause of change of the eruption
a. occlusion
b. pathological
c. mesial drifting
54 what happen if there is a premature exfoliation of a mandibular primary canine
the mandibular incisors would move distally and lingually
decrease arch length
shift midline to affect side
need space maintainer
55 what happens with intercanine distance after mixed dentition
a. increased
b. decreased
c. stable, no change
56 after the age of 6, where does the mandibular growth of a child mostly happens
posterior to the second molars
57 where is the maxillary growth center
maxillary tuberosity
58 if there is no succedaneous tooth, a primary tooth would absorb
a. more slowly
b. more quickly
c. would not resorb at all
59 a patient who works at a nuclear power plant wears a work badge for detecting exposed amount of
radiation annually. When he comes to see a dentist, what is the most likely reason that he does not need to
wear his badge during the dental X-ray examination
a. dental x-ray is too small amount for the badge
b. the badge only detects exposed amount at work, the dental X-ray does not include in his work
environment dose
c. the badge detects gamma ray, not X-ray
60 if there is radiation exposure of 4 Gy on the arm, what is the likely reaction
a. erythema
b. bone marrow depression
c. vascular shrinkage
61 which cells are the most sensitive to radiotherapy
a. hematopoietics
b. GI mucosa
c. muscle
d. adult brain cells
62 upper limb IV injection, the most likely problem is
a. Phlebitis
b. intra-arterial injection
c. vascular breakage
63 a child asking repetitive and persistent questions are most likely
a. very curious about the treatment
b. trying to delay the treatment
c. hyperkinetic
d. audistic
64 the problem that dentists encounter the most during treatment of audistic children is
lack of communication
65 what kind of disease would result a patient to have osteoma and multiple intestinal polyposis
Gardner’s syndrome
66 polyposis perioral pigmentation
Peutz-Jeghers
67 a patient who has multiple odontokeratocysts in the jaw and dermal pigmented macules on the back,
cyst lesion on the skin should be suspected to have
basal cell nevus syndrome
68 which syndrome would have the triad of diabetes insipidus, exophthalmos multiple bone lesion
Langerhans cell histiocytosis
69 to differentiate cement dysplasia from a periapical cyst
a. pulp testing
b. probing
c. X-ray
70 which of the following would cause malaise and fever on a patient
a. acute periodontal abscess
b. acute pulpitis
c. chronic pulpitis
d. acute periodontitis
71 aspirin stops pain by
a. stopping the upward transduction of pain signal in the spinal cord
b. stopping the signal transduction in the cortex
c. interfere with signal interpretation in the CNS
d. stopping local signal production and transduction
72 the following are the natural endorphins except
a. enkephalin
b. endorphin
c. dynorphin
d. bradykinin
73 what is the action of morphine for pain relief
mimicking body endorphin system
74 which one of the following does not have anti-inflammatory reactions
acetaminophen only, all NSAID have anti-inflammatory
75 periodontal disease can be caused by all of the followings except
a. poor oral hygiene
b. heavy dental plaque
c. faulty prosthesis
d. DM
76 which of the following materials is very hard to remove from patient's mouth
a. alginate
b. polyether
c. polysulfide
d. silicone
77 which one of the followings is not a characteristics of additional type silicone
a. impression must be poured right away because alcohol would vaporized and result in distortion
b. very stable, can be stored for more than a week
c. can have multiple pours
d. high accuracy
e. may release H2 in some materials
78 GIC is composed of
aluminosilicate+polyacrylic acid
79 the best and the most effective way to remove stained mottled enamel
a. home bleaching
b. microabrasion technique
c. office bleaching
d. walking bleaching
80 what is a microabrasion technique
intrinsic stain can be caused by
porphyria
81 the followings have additive action for each component when used together, except for one, what is the
exception
a. Atropine+glycopyrolate (anticholinergic)
b. aspirin acetaminophen
c. penicillin tetracycline
82 what is the maximal concentration used for N2O sedation?
a. 5%
b. 10%
c. 50%
d. 80%
83 patients who have nausea and vomit during N2O sedation usually
a. are allergic to N2O
b. inhale too high concentration of N2O
c. eat a big meal right before the procedure
84 what is the % of US population who sees a dentist each year?
what is the best sedative medication in a dental office setting
a. phenobarbital
b. morphine
c. N2O
85 what are the schedule II drugs?
during fabrication of pediatric SSC, which surface of the tooth requires the least reduction
a. facial
b. lingual
c. proximal
d. they all need the same amount of reduction
86 ataxic epilepsy patients-what are their most common dental problem
a. adontia
b. malocclusion
c. trauma
d. gingival hyperplasia due to medication
87 what is the optimal incisal reduction of anterior porcelain fused to metal crown
a. 1mm
b. 1.5mm
c. 2.0mm
d. 2.5mm
88 porcelain veneer-what is the most important advantage
compared with porcelain veneer, what is the most important advantage of resin veneer
a. esthetic
b. cost
c. tooth preservation
89 compared with class II plaster, which one of the following is NOT the characteristics of die strength
a. better compression strength
b. better tensile strength
c. require less water
d. higher expansion
90 which of the followings is not an advantage of resin based GIC over water based GIC?
a. better Fluoride release
b. better bonding
c. better esthetic
d. easier for manipulation
91 what is the characteristics of an implant that would change bony resorption pattern
a. intraosseous integration
b. integrate with bone
92 what are the recommended numbers of implants for complete edentous patients
a. maxilla 1 mandibular 1
b maxilla 3 mandibular 2
c. maxilla 6 mandibular 4
d. maxilla 8 mandibular 6
93 what is the term that describe the number of the cases of a disease divided by the population
a. incidence
b. ratio
c. prevalence
94 what is median of 10 20 20 20 30 35 40 40 50 50 60
apically positioned flap is almost impossible to perform on
a. maxillary buccal area
b. maxillary lingual area
c. mandibullar lingual area
d. mandibular buccal area
95 in order to increase the success rate of treating local juvenile periodontitis, what should be done
a. combine usage of systemic antibiotic
b. local antibiotic treatment
c. use of chlorhexidine
96 class II amalgam cavity preparation, what is the purpose of breaking up contact at the gingival
cavosurface? What is the purpose of placing retention grooves, and where do you place these grooves?
97 which feature provide the BOND onlay the most retention?
98 which drugs have active metabolites that would prolong its effect?
Diazepam, chlordiazepoxide (all choice are narcotics)
99 when a child loses its primary second molar before permanent first molar eruption, what is the choice of
space maintainer?
a. lingual holding arch
b. band and loop
c. distal shoes
d. Nance appliance
100 A black male with erosive lips, erythematous and blisters on his lips, the description says that he also
have palmar and planta erosion and blisters, what is this syndrome?
a. lichen planus
b. erythema multiform
c. pemphigus vulgaris
d. pemphigoid
101 white macule on the floor of the mouth, bilateral, what is most likely diagnosis?
an old male came to the clinic with pain and swelling on the left side of mandible. The patient mentioned
that he had extractions a few mouth ago and the healing was not going well. In X-ray shows cotton wool,
ground glass radio-opacity lesion at the left side of the mandible, the bone margines is diffuse and nonclear.
large area is involved and there is no definite margin.
chronic osteomyelitis
102 a child comes to the clinic with pain at the mandible. The X-ray shows sunflower outgrowth of bone
spicules
osteosarcoma
103 which component in local anesthesia causes the most toxic effects in clinical situations?
a. vasoconstrictor
b. local anesthesia
c. preservatives
104 what are the systemic effect of lidocaine and epinephrine
105 when pKa increases for the same lidocaine, what happens to its effect?
local anesthetics with a pKa closer to the physiologic pH will have higher concentrations of the non-ionized
base (lipid soluble) form pass into the nerve cell resulting in a more rapid onset of action
106 the percentage of specific LA which is present in the base form when injected in tissue whose pH is 7.4
is inversely proportional to the pKa of that agent
a. onset is faster, duration is longer
b. onset is slower, duration is longer
c. onset is the same, duration is the same
d. onset is slower, duration is the same
107 why should the wax pattern be washed by soap water before it is invested
increase surface wetting ability
a child with post operational lip swelling is most likely to have
a. allergy to the local anesthesia
b. bitten on his lip
c. accidental vascular injection
108 which local anesthesia can be used as a topical anesthesia as well
a. lidocaine
b. bupivacaine
c. Polocaine
109 which antibiotics should a patient take who needs premedication prophylaxis and who is allergic to
penicillins according to the American heart association 1997 recommendation?
clindamycin 600mg
a tongue with a smooth pink swelling on the dorsum
a. a neuroma
b. a neurofibroma
c. a fibroma
110 what is the most likely post operative side effect of bilateral sagittal split osteotomy
a. instability
b. nerve damage
c. devitalization of teeth
d. relapse
111 which nerve would the ramus split osteotomy most likely damage?
for extracting of third molar, the following conditions would make the operation easier, except?
a. elastic bone
b. conical roots
c. soft tissue impaction
d. space within tooth bud is small
112 what kind of question would be an open-ended question?
what is the most used trigeminal neuralgia medication?
a patient who is taking dicumarol has most likely a history of
a. angina
b. coronal infarct
c. congestive heart failure
d. corp pulmonale
113 what is the common sign for all kinds of shocks?
lack of perfusion
what is the first sign of a patient who is suffering from insulin shock?
a. pallor
b. shaking
c. sweating
d. nervousness
114 in which areas should scalloping be reduced in periodontal surgery?
anterior esthetic region
115 what is the best sign for success of apexogenesis
continuous completion of apex
116 what kind of procedure should be performed on a tooth with necrotic pulp and unfinished root tip
a. apexogenesis
b. apexification
c. pulpotomy
d. pulpectomy
117 which type of syncope is most common in dental office
a. hypovolemic
b. psychogenic
c. posture
118 when parents insist on entering the dental office with the child, the child's behavior is usually
a. worse
b. better
c. depending on the parent's behavior
119 the toxic effect of sulf ram is produced by which of its metabolites?
a. acetyl aldehyde
b. formaldehyde
c. glutaraldehyde
120 during injection of superior posterior alveolar nerve, a swelling suddenly occurs, what most likely
happen? what is the treatment of this?
121 which one of the injections most likely have positive inspiration?
a. IA 10-15%
b. akisino
c. infraorbital
d. Gow-Gate 2%
e. mental nerve
122 which of the following drugs would produce gingival hyperplasia and immuno depression?
a. nifedipine
b. cyclosporin
c. phenytoin
123 a child who is having leukemia treatment most likely have the infection of
a. histoplasmosis
b. candidiasis
124 what is the most definite way to differentiate ameloblastoma, and odontogenic keratocyst?
a. smear cytology
b. reactive light microscopy
c. reflective microscopy
125 what is the most likely diagnosis of a soft tissue lesion that is fixed at the margines
a. infection
b. malignancy
c. begin tumor
126 what is the cyst that has lymphoid tissue and epithelioid cells?
lymphoepithelioid cysts
127 what is the most likely sign of neoplasm?
a. metaplasia
b. anaplasia
c. aplasia
128 what is the Bennett angle?
129 when the dentist inserts in new complete denture in a patient's mouth, there is obvious occlusal
disharmony. What is the most likely cause?
a. initial vertical dimension
b. the casts were mounted at the wrong hinge axis
130 a dentist who uses 5-HEMA for clinical situations most likely experiences which of the following
conditions for the clinician?
a.contact dermatitis
b. arthritis
c. arthus reaction
d. delayed hypersensitivity
d. anaphylaxis
131 if upper anterior teeth are placed too anteriorly and superiorly in a complete denture, the patient would
have difficult pronouncing
a. v/f sound
b. t/d sound
c. s/th sound
d. j/ch sound
132 what was done wrong that the resin teeth won't stay with resin denture base?
a. retentive holes are not big enough
b. there is no locking system
c. wax got in between during processing
133 what is purpose of beveling at MON cavosurface?
for a patient with a faulty amalgam restoration, replacement with casting inlay/onlay might be better
because
a. better adaptation
b. better retention
c. better proximal contour
134 when restoration material is resin, which kind of base material should be avoided?
a. zinc phosphate
b. zinc oxide eugenol
c. glass ionomer cement
d. resin modified GIC
135 why is it that, during mixing cement, the liquid part is not taken out of its container right before
mixing?
a. the liquid would spread widely
b. keep it cool in its container
c. prevent loss of volatile materials
136 red erosion at gingiva, buccal mucosa, tongue
erosive lichen planus
a dental patient with type 1 DM should
a. delay both his insulin shot and food intake until dental procedure completed
b. eat prior to dental procedure, delay his insulin shot until procedure is over
c. eat and have the insulin shot prior to dental procedure
137 a 5 years old child who lives in a community with water fluoridation of 0.75ppm should have
supplemental F intake of
a. 0mg
b. 0.25mg
c. 0.5mg
d. 1mg
138 the best concentration of APF for clinical use
a. 5%
b. 1 %
c. 0.5%
d. 1.23%
d. 3.2%
139 0.5 oz chlorhexidine equals how much of ml chlorhexidine?
140 which field of following can be a specialty according to ADA
a. public health
b. cosmetic dentistry
c. hospital dentistry
d. geriatric dentistry
141 what are the most abundant cells in crevicular fluid in gingivitis and periodontitis?
a. mast cells
b. neutrophils
c. plasma cells
d. basophiles
142 which kind of parents can not be treated with b-blocker as anti-arrithymic medication
a. patients with angina
b. patients with hypertension
c. patients with asthma
d. patient with COPD
143 which one of the following is the most important factor for providing retention cor complete denture
a. cohesion
b. adhesion
c. peripheral seal
144 what are the two most important factors for retention for complete denture?
peripheral seal
intimate tissue contact
145 what is the reason that a patient complains of lower complete denture "popping up" all the time
a. lack of retention
b. over-extention
c. under-extention
d. deflective occlusion
146 what is the cause of epulis fissuratum
a. unstable denture
b. under extention
c. over extention
d. traumatic occlusion
147 a patient complains that his TMJ would pop upon opening and click during closing. What is the likely
diagnosis
a. ankylosis
b. reciprocal clicking
c. arthritis
148 what are the muscle that determine the lingual border of a mandibular complete denture
glossopalatal, mylohyoid, geniohyoid
149 which gland is the one that most likely to have sialolith
a. submental
b. submandibular
c. parotid
d. palatal mucus gland
150 which intra-oral site is the most common site of melanoma
a. buccal mucosa
b. gingiva
c. hard palate
d. floor of mouth
e. tongue
151 when observing an amalgam filling, the dentist found that there is proximogingival angle deficiency,
what is likely to be the main cause of this
a. a. inadequate wedging
b. matrix not well adapted
c. too large an initial amount of amalgam added to the cavity
152 which type of amalgam needs larger condensers and lateral condensation?
a. admixed
b. lathe-cut
c. spherical
d. conventional
e. high copper type
153 which metal element of cobalt chromium alloy would provide the anti-corrosion property
a. cobalt
b. chromium
c. both
d. neither
154 due to the mesial concavity of the maxillary first premolar, prior to condensation of the amalgam, the
tooth is best prepared with
a. wedge only
b. matrix only
c. no wedge nor matrix needed
d. custom made wedge+matrix
155 which one of the teeth has the most consistent canal
a. mandibular incisor
b. mandibular premolar
c. maxillary canine
d. maxillary premolar
e. mandibular molar
156 maxilla lateral incisor root tip usually tips to
a. palatal
b. facial
c. mesial
d. distal
157 which one of the following teeth has a triangular canal shape?
maxillary central incisor
158 what is the pupl chamber shape of a mandibular first molar with 4 canals
a. trapezoidal
b. triangular
c. square
d. oval
e. ellipse
159 which one of the following can not be observed on X-ray
a. canal calcification
b. root buccal curvature
c. canal numbers
d. the apical condition
160 parallel technique in X-ray taking follows many of the rules to optimize the resultant image except for
one, what is this rule?
a. keep the film and the target tooth as parallel as possible
b. the incomingcentral ray should be perpendicular to the film and the target tooth
c. the film should be placed as far to the source of X-ray as possible
d. the target tooth and film sould be as close as possible.
161 when the electrons hit the anode from the cathode in an X-ray machine, where does most of the energy
turn into
a. X-ray
b. Heat
c. light
d. Gamma ray
e. no loss of energy
162 on a panoramic radiograph there is a soap bubble appearance bilaterally in region of the angle the
mandible. The condition most likely is
a. ameloblastoma
b. cherubism
c. ameloblastic fibroma
d. fibrous dysplasia
163 radiographically there is a widening of the periodontal ligament space around all the teeth. What is
your initial diagnosis
a. earliest sign of osteosarcoma
b. scleroderma
c. hyperparathyroidism
d. fibrous dysplasia
164 how will you treat a tooth that has been fracture below the alveolar bone level
a. wait for it to erupt
b. extract
c. endodontically fill the tooth and place a post and core
165 which nerve may be injury when giving a patient an injection in the buttocks
a. femoral
b. sciatic
c. gastrocnemius
166 what will make you suspect that a patient has nursing bottle caries
a. caries buccally on mandibular anterior teeth
b. caries buccally on maxillary anterior teeth
167 the apical foramen most often exist the root
a. at the anatomic apex
b. 0.5 mm from apex
c. less than 0.5mm from the apex
168 the tube of the dental x-ray machine is surrounded by
a. vacuum
b. oil
c. helium
169 best way of image TMJ
a. pan
b. MRI
c. transcranial
d. CT
170 with which local anesthetic injection is one likely to produce a hematoma
a. mandibular nerve block
b. posterior superior alveolar nerve block
c. anterior superior alveolar nerve injection
d. middle superior alveolar nerve injection
171in making radiographs, which of the following controls the mean energy of the x-ray
a. mA
b. kVp
c. focal spot size
d. exposure time
172 what condition is contraindicated to elective root canal therapy
a. AIDS
b. recent MI
c. leukemia
d. radiotherapy
e. 2nd trimester pregnancy
173 which organism is involved with periodontal disease
a. P. gingivalis
b. E species
c. bacterioids
d. C. rectus
e. all of the above
174 a new patient informs you that he is taking dicumarol daily, what test result will you request to see
a. PPT
b. PT
c. CBC
d. blood chemistry
175 which nerve is involved with a Le Forte II fracture
a. greater palatine
b. infra orbital
c. nasopalatine
d. posterior superior
176when moving tooth orthodontically where is the center of resistance
a. at cervical margin
b. half way down the root
c. at apex
d. 2/3 up from the apex
177 if SNA is 82 and the patient is 90 what is increase
a protrusive mandible
b. protrusive maxilla
c. retrusive mandible
d retrusive maxilla
178 a patient has MOD amalgam placed 3 weeks ago and the patient complains of pain with heat since
restoration was placed. How will you treat this patient
a. wait another 3 weeks
b. endo
c. extract
d. place a sedative restoration
179 what is cement of choice for composite inlays
a. zinc phosphate
b. resin cements
c. polycarboxylate
180 what percent of lower molar first molar have 4 canals
a. 15%
b. 35%
c. 55%
d. 2%
e 25%
181 a 9 years old girls tells you that “my mom I nagging me all the time to brush my teeth” what should
you say in response
a. would not say anything
b. clean teeth are healthy teeth
c. if you do not brush your teeth they will fill out
d. I see that you are having a problem with your Mom
182 what is most likely site to perforate when making access for RCT on a tooth #8
a. distal
b. facial
c. lingula
d. mesial
183 with a modified Widman flap you mostly reduce bone by
a. adapt the flap margin
b. osseous restructuring
c. removal of infected osseous tissue
d removal of malignancy tissue
184 why do clinical remount
a. adaptation of trial bases and CD are different
b. compensate for VDO
c. compensate for improper face bow transfer
185 all are true for a composite inlay except
a. rounded internal line
b. margin in enamel
c. cavosurface bevel
186 finding the juvenile periodontitis
a. margination of the teeth
b. leukopenia
c. leukocytosis
187 which best describes the interpersonal distance zone in which dentist usually treat their patient
a. social
b. intimate
c. public
d. personal
188 the treatment of choice for an 8 years old patient who has a 1 mm intrusion of the permanent lateral
maxillary incisor is
a. extract the tooth
b. allow the tooth to re-erupt
c. perform pulpotomy
d. splint the tooth for 10 days
189 biotransformation is all except
a. conjugation
b. covalent bond
c. hydrolysis
d. oxidation
190 when diazepam and atropine are administered together everything happens except
a. sedation
b. analgesia
c. relaxation
191 principle for occlusal-lingual amalgam preparation
a. retained by occlusal prep
b. self retentive immediately past where grooves coalesce
c. sharp retention
d. cavosurface bevel
192 radiographic sign of trauma from occlusion include each of the following except one, which one is this
exception
a. hypercementosis
b. root resorption
c. alteration of the lamina dura
d. alteration of the periodontal ligament
e. vascular infiltration of the periodontal ligament
193 which of the following properties of sodium hypochlorite most undesirable
a. smell
b. toxicity to viral dentin
c. tendency to bleach dentin
d. corrosive actin on endodontics files
e. reaction with chelating agents
194 what is activity of caries if seal off with restoration
a. regresses
b. no activity
c. increase
195 the most frequent site where pain radiate to ear
a. mandibular premolar
b. mandibular molar
c. maxillary molar
d. maxillary premolar
196 therapeutic index of a drug indicates the relative
a. efficacy
b. potency
c. safety
d. duration
e. solubility
197 when does cleft palate deformity occur during pregnancy
a. middle trimester
b. first trimester
c. third trimester
d. at a difficult delivery
198 all are advantage of hybrid ionomer except
a. esthetics
b. bond strength
c. wear resistance
d. coefficient of thermal expansion
199 to correct a posterior cross bite the attachment must be placed on
a. labial of maxillary and labial of mandibular teeth
b. lingual maxillary and labial of mandibular teeth
c. palatal f maxillary and labial of mandibular teeth
200 the majority of cell in dental pulp are
a. nerve cell
b. fibroblasts
c. Blood vessels
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