NBDE part II question
Started by funstuff
thanks for answering, but i was doubtful on the one about code of ethics, wouldnt he be violating the "non-maleficence" since that one IS one of the 4 bioethical principles and the definition is: Non-maleficence means to do no harm. Physicians must refrain from providing ineffective treatments or acting with malice toward patients.
It's a little tricky😕
can someone please help answer these?? thanks a lot !
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Some q : pl answer
Administration of succinylcholine to patient deficient in serum cholinesterase would casue:
convulsions
Hypertension
Prolonged apnea
Acute asthma attack
Thermal conductivity values are as follows:
amalgam .023 (J/sec/cm2)/( C/cm)
gypsum .0031
enamel .0022
dentin .0015
Which material is the best thermal insulator?
a) amalgam
b) gypsum
c) enamel
d) dentin
. The ionizing portion of the electromagnetic spectrum has wavelengths __________ than the visible portion
a) less than
b) about the same as
c) greater than
. On a stress-strain diagram, the straight line portion corresponds to ____behavior.
a. elastic
b. plastic
c. ceramic
d. metallic
Prismless enamel
a) is found at the DEJ
b) is found on the outer surface of enamel
c) forms the dentin smear layer
d) all above
e) none above
Slip occurs
a) on close packed planes
b) in close packed directions
c) easier in fcc then bcc metals
d) a & b
e) all above
When a metal is plastically deformed
a) the number of dislocations increases
b) the number of dislocations decreases
c) the number of dislocations stays constant
Polymerization of PMMA comes from breaking which bond?
a. C=C
b. C=O
c. C-C
d. C-O
e. C-OH
Methacrylates
a) are found in bonding agents
b) are found in resins
c) are copolymerizable
d) include HEMA and PMMA
e) all above
Translucency in ceramic restorations is a result of
a) the high refractive index of silica
b) the high porosity of sintered ceramics
c) the high content of amorphous glass
d) all of the above
Administration of succinylcholine to patient deficient in serum cholinesterase would casue:
convulsions
Hypertension
Prolonged apnea
Acute asthma attack
Thermal conductivity values are as follows:
amalgam .023 (J/sec/cm2)/( C/cm)
gypsum .0031
enamel .0022
dentin .0015
Which material is the best thermal insulator?
a) amalgam
b) gypsum
c) enamel
d) dentin
. The ionizing portion of the electromagnetic spectrum has wavelengths __________ than the visible portion
a) less than
b) about the same as
c) greater than
. On a stress-strain diagram, the straight line portion corresponds to ____behavior.
a. elastic
b. plastic
c. ceramic
d. metallic
Prismless enamel
a) is found at the DEJ
b) is found on the outer surface of enamel
c) forms the dentin smear layer
d) all above
e) none above
Slip occurs
a) on close packed planes
b) in close packed directions
c) easier in fcc then bcc metals
d) a & b
e) all above
When a metal is plastically deformed
a) the number of dislocations increases
b) the number of dislocations decreases
c) the number of dislocations stays constant
Polymerization of PMMA comes from breaking which bond?
a. C=C
b. C=O
c. C-C
d. C-O
e. C-OH
Methacrylates
a) are found in bonding agents
b) are found in resins
c) are copolymerizable
d) include HEMA and PMMA
e) all above
Translucency in ceramic restorations is a result of
a) the high refractive index of silica
b) the high porosity of sintered ceramics
c) the high content of amorphous glass
d) all of the above
[SIZE=+1]Question 26 of 97[/SIZE]
When establishing balanced occlusion, lingual cusps of maxillary posterior teeth on the non-working side should contact the
can some one explain this
When establishing balanced occlusion, lingual cusps of maxillary posterior teeth on the non-working side should contact the
- facial inclines of lingual cusps of mandibular posterior teeth.
- lingual inclines of lingual cusps of mandibular posterior teeth.
- lingual inclines of facial cusps of mandibular posterior teeth. ans
- central fossae of mandibular posterior teeth.
can some one explain this
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45. In an 8 year old child, there is a recession in a mandibular incisor with posterior crossbite, which of the following treatment options is the least acceptable? oral hygiene instruction, graft, correction of cross bite, observation.???
What effect does salivation have on total prosthesis? Less salivation leads to less retention, with less salivation there is a need for a soft liner material, none of the above ( i couldnt remember the other option)
47. What is the main reason for removing complete dentures at night? To reduce tissue irritation and the health of the tissue
52. What is the prevalence of cleft lip/palate in USA?
60. Glass ionomer has an advantage in the it liberates fluor and is also: resistant to wear, high tensile stretngth, chemical bonds to dentin and enamel, high translucency
61. The higher the spectrum of an antibiotic the : bacterias become less resistant, greater effect over gram negative bacteria, greater predisposition to suprainfections.
62. What has interactions with ginseng?
1. To ensure better thermal and protective insulation of the pulp during a capping procedure, calcium
hydroxide should be:
A. Applied to a thickness of 3.0 mm.
B. Placed in all cavity preparations.
C. Covered with a stronger base.
D. Preceded by application of a cavity varnish.
E. Preceded by application of a zinc phosphate cement.
Calcium hydroxide is generally the material-of-choice in vital pulp capping because it:
A. Is less irritating to the pulp.
B. Encourages dentin bridge formation.
C. Seals the cavity better than most other materials.
During the preparation of a Class II cavity, which of the following permanent teeth pulp horns will be
the most subject to accidental exposure?
A. Distofacial of a maxillary first molar
B. Distofacial of a mandibular first molar
C. Facial of a mandibular first premolar
D. Lingual of a mandibular first premolar
A patient is experiencing a throbbing pain in a specific tooth. This pain is aggravated by heat and
relieved by cold. The tooth is sensitive to percussion. The most likely diagnosis is:
A. Occlusal trauma.
B. Periodontal abscess.
C. Irreversible pulpitis.
D. Hyperemia of the pulp.
Which of the following describes the character of dentinal tubules at the pulpal end when compared to
those at the enamel end?
a. More per unit surface area and more wider in diameter.
b. Less per unit surface area but much wider in diameter.
c. More per unit surface area and smaller in diameter.
d. Less per unit surface area and smaller in diameter.
What would be the end result and prognosis of untreated internal resorption?
a. Perforation into external surface of root which would heal if left undisturbed.
b. Perforation into external surface of root with a marked low prognosis for any treatment.
c. No untoward incident would occur provided no future trauma is sustained.
d. Calcification of the root canal system with a guarded prognosis
There usually is no lesion apparent radiographically in acute apical periodontitis. However,
histologically bone destruction has been noted.
a. Both statements are true
b. Both statements are false.
c. First statement is true, second is false.
d. First statement is false, second is true.
Based solely on the sharp transient response of pulp to hot stimuli, what is the periradicular diagnosis?
a. Acute apical periodontitis
b. Cannot diagnose based on information provided.
c. Acute Apical abscess
hydroxide should be:
A. Applied to a thickness of 3.0 mm.
B. Placed in all cavity preparations.
C. Covered with a stronger base.
D. Preceded by application of a cavity varnish.
E. Preceded by application of a zinc phosphate cement.
Calcium hydroxide is generally the material-of-choice in vital pulp capping because it:
A. Is less irritating to the pulp.
B. Encourages dentin bridge formation.
C. Seals the cavity better than most other materials.
During the preparation of a Class II cavity, which of the following permanent teeth pulp horns will be
the most subject to accidental exposure?
A. Distofacial of a maxillary first molar
B. Distofacial of a mandibular first molar
C. Facial of a mandibular first premolar
D. Lingual of a mandibular first premolar
A patient is experiencing a throbbing pain in a specific tooth. This pain is aggravated by heat and
relieved by cold. The tooth is sensitive to percussion. The most likely diagnosis is:
A. Occlusal trauma.
B. Periodontal abscess.
C. Irreversible pulpitis.
D. Hyperemia of the pulp.
Which of the following describes the character of dentinal tubules at the pulpal end when compared to
those at the enamel end?
a. More per unit surface area and more wider in diameter.
b. Less per unit surface area but much wider in diameter.
c. More per unit surface area and smaller in diameter.
d. Less per unit surface area and smaller in diameter.
What would be the end result and prognosis of untreated internal resorption?
a. Perforation into external surface of root which would heal if left undisturbed.
b. Perforation into external surface of root with a marked low prognosis for any treatment.
c. No untoward incident would occur provided no future trauma is sustained.
d. Calcification of the root canal system with a guarded prognosis
There usually is no lesion apparent radiographically in acute apical periodontitis. However,
histologically bone destruction has been noted.
a. Both statements are true
b. Both statements are false.
c. First statement is true, second is false.
d. First statement is false, second is true.
Based solely on the sharp transient response of pulp to hot stimuli, what is the periradicular diagnosis?
a. Acute apical periodontitis
b. Cannot diagnose based on information provided.
c. Acute Apical abscess
Which of the following describes the character of dentinal tubules at the pulpal end when compared to
those at the enamel end?
a. More per unit surface area and more wider in diameter. ANSWER
b. Less per unit surface area but much wider in diameter.
c. More per unit surface area and smaller in diameter.
d. Less per unit surface area and smaller in diameter.
am i correct
those at the enamel end?
a. More per unit surface area and more wider in diameter. ANSWER
b. Less per unit surface area but much wider in diameter.
c. More per unit surface area and smaller in diameter.
d. Less per unit surface area and smaller in diameter.
am i correct
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which of the following characteristic of the autism presents a major obstacle for the successful dental management for the ambulatory pateint
impaired communication
inability to perform fine movements
lack of intellectual development
apparent insensitivity to pain
impaired communication
inability to perform fine movements
lack of intellectual development
apparent insensitivity to pain
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when 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
what is the most definite way to differentiate ameloblastoma, and odontogenic keratocyst?
a. smear cytology
b. reactive light microscopy
c. reflective microscopy
a. at cervical margin
b. half way down the root
c. at apex
d. 2/3 up from the apex
what is the most definite way to differentiate ameloblastoma, and odontogenic keratocyst?
a. smear cytology
b. reactive light microscopy
c. reflective microscopy
according to orbans
ratio between the number of the tubules /unit surface area on the pulpal and outer surface is 4:1
the tubules are larger in diameter near the pulp than outer surface
so the ans is More per unit surface area and more wider in diameter.
ratio between the number of the tubules /unit surface area on the pulpal and outer surface is 4:1
the tubules are larger in diameter near the pulp than outer surface
so the ans is More per unit surface area and more wider in diameter.
max ridge with bone resorption gets?
a.wider and larger b.wider and smaller c.narrower and smaller d.narrower and larger
after doing RCT, the success can be determine by all the following except
a loss of periapical radiolucency on the radiograph
b. formation of apical scar
c. absence of pain
d. absence of exudate
a.wider and larger b.wider and smaller c.narrower and smaller d.narrower and larger
after doing RCT, the success can be determine by all the following except
a loss of periapical radiolucency on the radiograph
b. formation of apical scar
c. absence of pain
d. absence of exudate
Planing the enamel at the gingival cavosurface of a Class II amalgam preparation
on a permanent tooth
A. should result in a long bevel.
B. is contraindicated because of the low edge strength of amalgam.
C. is unnecessary since the tooth structure in this area is strong.
D. should remove unsupported enamel which may fracture.
E. should result in a sharp gingivoproximal line angle.
in diagnosing dental caries estimated mean time for progression through tooth enamel is .
3-6 months
6 mnths to a year
2-3 years
3-4 years
4-5 years
on a permanent tooth
A. should result in a long bevel.
B. is contraindicated because of the low edge strength of amalgam.
C. is unnecessary since the tooth structure in this area is strong.
D. should remove unsupported enamel which may fracture.
E. should result in a sharp gingivoproximal line angle.
in diagnosing dental caries estimated mean time for progression through tooth enamel is .
3-6 months
6 mnths to a year
2-3 years
3-4 years
4-5 years
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1. A periapical infection of a mandibular third molar
may spread by direct extension to the
1. parapharyngeal space.
2. submandibular space.
3. pterygomandibular space.
4. submental space.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
2. Allergic reactions to amide-type local anesthetic
solutions are most likely caused by sensitivity to
A. lidocaine hydrochloride.
B. epinephrine.
C. methylparaben.
D. contaminants.
3. The most appropriate radiographic examination for
a 4 year old without visible or clinically detectable
caries or anomalies, and with open proximal
contacts is
A. maxillary and mandibular anterior
occlusals.
B. a pair of posterior bitewings.
C. maxillary and mandibular posterior
periapicals.
D. none.
4. The washing of hands must be performed before
putting on and after removing gloves because it
1. reduces the number of skin bacteria
which multiply and cause irritation.
2. completely eliminates skin bacteria.
3. minimizes the transient bacteria which
could contaminate hands through small
pinholes.
4. allows gloves to slide on easier when the
hands are moist.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
5. For prevention of cross infection, which of the
following impression materials can be treated with
a disinfecting spray solution/ agent?
A. Irreversible hydrocolloid (alginate).
B. Polyether.
C. Polysulfide.
D. Polysiloxane.
E. All of the above.
6. One week after an amalgam restoration is placed
in the mandibular first premolar, the patient returns
complaining of a sharp pain of short duration when
eating or drinking something cold. Teeth respond
normally to electric pulp testing and heat and the
radiographs are normal. The most likely diagnosis
is
A. hypercementosis.
B. reversible pulpitis.
C. pulpal microabscess.
D. acute apical periodontitis.
7. The most frequent cause of malocclusion is
A. thumbsucking.
B. mouth breathing.
C. heredity.
D. ectopic eruption.
.8.An 8 year old patient with all primary molars still
present exhibits a cusp-to-cusp relationship of
permanent maxillary and mandibular first molars
and good alignment of the lower incisors. The
management of this patient should be to
A. refer for orthodontic consultation.
B. use a cervical headgear to reposition
maxillary molars.
C. disk the distal surfaces of primary
mandibular second molars.
D. place patient on appropriate recall
schedule.
The facial and lingual walls of the occlusal portion
of a Class II cavity preparation for an amalgam in
deciduous teeth should
A. be parallel to each other.
B. diverge toward the occlusal surface.
C. converge toward the occlusal surface.
D. not follow the direction of the enamel
rods.
A patient telephones and tells you he has just
knocked out his front tooth but that it is still intact.
Your instructions should be to
A. put the tooth in water and come to your
office at the end of the day.
B. wrap the tooth in tissue and come to your
office in a week's time.
C. put the tooth in alcohol and come to your
office immediately.
D. place tooth under the tongue and come to
your office immediately.
E. place the tooth in milk and come to your
office immediately.
An acute periapical abscess originating from a
mandibular third molar generally points and drains
in the
A. submandibular space.
B. pterygomandibular space.
C. buccal vestibule.
A patient presenting with diplopia, exophthalmos,
nasal bleeding and swelling, may suffer from a
fracture of the
A. neck of the condyle.
B. body of the mandible.
C. zygomatic bone.
D. maxillary tuberosity
The design of a mucoperiosteal flap should
1. provide for visual access.
2. provide for instrument access.
3. permit repositioning over a solid bone
base.
4. be semilunar in shape.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
D. buccal space.
may spread by direct extension to the
1. parapharyngeal space.
2. submandibular space.
3. pterygomandibular space.
4. submental space.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
2. Allergic reactions to amide-type local anesthetic
solutions are most likely caused by sensitivity to
A. lidocaine hydrochloride.
B. epinephrine.
C. methylparaben.
D. contaminants.
3. The most appropriate radiographic examination for
a 4 year old without visible or clinically detectable
caries or anomalies, and with open proximal
contacts is
A. maxillary and mandibular anterior
occlusals.
B. a pair of posterior bitewings.
C. maxillary and mandibular posterior
periapicals.
D. none.
4. The washing of hands must be performed before
putting on and after removing gloves because it
1. reduces the number of skin bacteria
which multiply and cause irritation.
2. completely eliminates skin bacteria.
3. minimizes the transient bacteria which
could contaminate hands through small
pinholes.
4. allows gloves to slide on easier when the
hands are moist.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
5. For prevention of cross infection, which of the
following impression materials can be treated with
a disinfecting spray solution/ agent?
A. Irreversible hydrocolloid (alginate).
B. Polyether.
C. Polysulfide.
D. Polysiloxane.
E. All of the above.
6. One week after an amalgam restoration is placed
in the mandibular first premolar, the patient returns
complaining of a sharp pain of short duration when
eating or drinking something cold. Teeth respond
normally to electric pulp testing and heat and the
radiographs are normal. The most likely diagnosis
is
A. hypercementosis.
B. reversible pulpitis.
C. pulpal microabscess.
D. acute apical periodontitis.
7. The most frequent cause of malocclusion is
A. thumbsucking.
B. mouth breathing.
C. heredity.
D. ectopic eruption.
.8.An 8 year old patient with all primary molars still
present exhibits a cusp-to-cusp relationship of
permanent maxillary and mandibular first molars
and good alignment of the lower incisors. The
management of this patient should be to
A. refer for orthodontic consultation.
B. use a cervical headgear to reposition
maxillary molars.
C. disk the distal surfaces of primary
mandibular second molars.
D. place patient on appropriate recall
schedule.
The facial and lingual walls of the occlusal portion
of a Class II cavity preparation for an amalgam in
deciduous teeth should
A. be parallel to each other.
B. diverge toward the occlusal surface.
C. converge toward the occlusal surface.
D. not follow the direction of the enamel
rods.
A patient telephones and tells you he has just
knocked out his front tooth but that it is still intact.
Your instructions should be to
A. put the tooth in water and come to your
office at the end of the day.
B. wrap the tooth in tissue and come to your
office in a week's time.
C. put the tooth in alcohol and come to your
office immediately.
D. place tooth under the tongue and come to
your office immediately.
E. place the tooth in milk and come to your
office immediately.
An acute periapical abscess originating from a
mandibular third molar generally points and drains
in the
A. submandibular space.
B. pterygomandibular space.
C. buccal vestibule.
A patient presenting with diplopia, exophthalmos,
nasal bleeding and swelling, may suffer from a
fracture of the
A. neck of the condyle.
B. body of the mandible.
C. zygomatic bone.
D. maxillary tuberosity
The design of a mucoperiosteal flap should
1. provide for visual access.
2. provide for instrument access.
3. permit repositioning over a solid bone
base.
4. be semilunar in shape.
A. (1) (2) (3)
B. (1) and (3)
C. (2) and (4)
D. (4) only
E. All of the above.
D. buccal space.
Last edited:
The most frequent cause of malocclusion is
A. thumbsucking.
B. mouth breathing.
C. heredity.
D. ectopic eruption.
cant it be C hereditary
A patient telephones and tells you he has just
knocked out his front tooth but that it is still intact.
Your instructions should be to
A. put the tooth in water and come to your
office at the end of the day.
B. wrap the tooth in tissue and come to your
office in a week's time.
C. put the tooth in alcohol and come to your
office immediately.
D. place tooth under the tongue and come to
your office immediately.
E. place the tooth in milk and come to your
office immediately.
why cant it be D
A. thumbsucking.
B. mouth breathing.
C. heredity.
D. ectopic eruption.
cant it be C hereditary
A patient telephones and tells you he has just
knocked out his front tooth but that it is still intact.
Your instructions should be to
A. put the tooth in water and come to your
office at the end of the day.
B. wrap the tooth in tissue and come to your
office in a week's time.
C. put the tooth in alcohol and come to your
office immediately.
D. place tooth under the tongue and come to
your office immediately.
E. place the tooth in milk and come to your
office immediately.
why cant it be D
Heredity is the right answer. Most common habit causing malocclusion is thumbsucking.
For the second one i felt oral cavity has lots of microorg compared to milk. If milk is not accessible then under the tongue is good as it maintains the moisture and has a neutral pH.
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