NBDE Part II - 1993 Exam F| QUESTIONS
AND ANSWERS| 100% CORRECT
A 6-year-old patient has a dark brown discoloration of his maxillary central
incisor. The discoloration started following trauma accompanied with a facial
sinus tract. What is the treatment-of- choice?
A. Extraction
B. Pulpectomy
C. Pulpotomy
D. Direct pulp treatment Correct Answer: A. Extraction
Squamous cell carcinoma appears in a variety of locations. In which of the
following locations is its prognosis the LEAST favorable?
A. Lower lip
B. Floor of the mouth
C. Hard palate
D. Buccal mucosa Correct Answer: B. Floor of the mouth
Although a dentist wishes to use the long-cone paralleling technique (40 cm
source-object distance), the x-ray machine is equipped with only a short cone (20
cm PID). As a result, the dentist moves the machine away from the patient's face
so the source-object distance is 40 cm and adjusts the exposure time
appropriately. Compared to the degree of tissue covered by an actual long cone,
this "extended" short cone exposes what amount of tissue?
A. More
B. The same
C. Less Correct Answer: A. More
Fluoride therapy and occlusal sealants modify which of the following four factors
the most?
A. Host
,B. Time
C. Substrate
D. Microflora Correct Answer: A. Host
Which of the following drugs produces sufficient central nervous system
depression to cause a state of sleep from which one may be aroused?
A. A sedative
B. A hypnotic
C. An opiate
D. An anesthetic Correct Answer: B. A hypnotic
Which of the following usually causes the slow progress in molar uprighting in an
adult patient?
A. Appliance friction
B. Excessive deep bite
C. Occlusal interferences
D. Poor patient cooperation
E. Lack of anchorage control Correct Answer: C. Occlusal interferences
Porcelain failure in all-ceramic restorations can best be avoided if the
A. occlusal forces are minimal.
B. ceramic material is not over 1/2 mm in thickness.
C. ceramic material is 1 1/2 mm in thickness.
D. angles of the preparation are rounded. Correct Answer: D. angles of the
preparation are rounded.
Squamous cell carcinoma of the tongue MOST commonly metastasizes to which
of the following?
A. Lungs
B. Liver
C. Bones
D. Cervical nodes Correct Answer: D. Cervical nodes
, To reduce a patient's salivary flow, a dentist has prescribed atropine. As a result
of this medication, the patient might experience which of the following side
effects?
A. Sedation
B. Diarrhea
C. Bradycardia
D. Blurred vision
E. Stomach cramping Correct Answer: D. Blurred vision
Which of the following is the OPTIMAL reduction for the lingual cusp on Tooth #3
to receive an MODL onlay?
A. 1.0 mm
B. 1.5 mm
C. 2.0 mm
D. 2.5 mm Correct Answer: B. 1.5 mm
Of the following local anesthetics, which has intrinsic vasoconstrictive actions?
A. Cocaine
B. Procaine
C. Xylocaine
D. Bupivacaine Correct Answer: A. Cocaine
During an interview, a dentist asks a patient, "You are not afraid of dentistry, are
you?" This is an example of which type of question?
A. Leading
B. Closed
C. Open
D. Funneling Correct Answer: A. Leading
To be effective in translating the roots of teeth, an orthodontic appliance must be
A. very gentle in action.
B. augmented with extraoral force.
AND ANSWERS| 100% CORRECT
A 6-year-old patient has a dark brown discoloration of his maxillary central
incisor. The discoloration started following trauma accompanied with a facial
sinus tract. What is the treatment-of- choice?
A. Extraction
B. Pulpectomy
C. Pulpotomy
D. Direct pulp treatment Correct Answer: A. Extraction
Squamous cell carcinoma appears in a variety of locations. In which of the
following locations is its prognosis the LEAST favorable?
A. Lower lip
B. Floor of the mouth
C. Hard palate
D. Buccal mucosa Correct Answer: B. Floor of the mouth
Although a dentist wishes to use the long-cone paralleling technique (40 cm
source-object distance), the x-ray machine is equipped with only a short cone (20
cm PID). As a result, the dentist moves the machine away from the patient's face
so the source-object distance is 40 cm and adjusts the exposure time
appropriately. Compared to the degree of tissue covered by an actual long cone,
this "extended" short cone exposes what amount of tissue?
A. More
B. The same
C. Less Correct Answer: A. More
Fluoride therapy and occlusal sealants modify which of the following four factors
the most?
A. Host
,B. Time
C. Substrate
D. Microflora Correct Answer: A. Host
Which of the following drugs produces sufficient central nervous system
depression to cause a state of sleep from which one may be aroused?
A. A sedative
B. A hypnotic
C. An opiate
D. An anesthetic Correct Answer: B. A hypnotic
Which of the following usually causes the slow progress in molar uprighting in an
adult patient?
A. Appliance friction
B. Excessive deep bite
C. Occlusal interferences
D. Poor patient cooperation
E. Lack of anchorage control Correct Answer: C. Occlusal interferences
Porcelain failure in all-ceramic restorations can best be avoided if the
A. occlusal forces are minimal.
B. ceramic material is not over 1/2 mm in thickness.
C. ceramic material is 1 1/2 mm in thickness.
D. angles of the preparation are rounded. Correct Answer: D. angles of the
preparation are rounded.
Squamous cell carcinoma of the tongue MOST commonly metastasizes to which
of the following?
A. Lungs
B. Liver
C. Bones
D. Cervical nodes Correct Answer: D. Cervical nodes
, To reduce a patient's salivary flow, a dentist has prescribed atropine. As a result
of this medication, the patient might experience which of the following side
effects?
A. Sedation
B. Diarrhea
C. Bradycardia
D. Blurred vision
E. Stomach cramping Correct Answer: D. Blurred vision
Which of the following is the OPTIMAL reduction for the lingual cusp on Tooth #3
to receive an MODL onlay?
A. 1.0 mm
B. 1.5 mm
C. 2.0 mm
D. 2.5 mm Correct Answer: B. 1.5 mm
Of the following local anesthetics, which has intrinsic vasoconstrictive actions?
A. Cocaine
B. Procaine
C. Xylocaine
D. Bupivacaine Correct Answer: A. Cocaine
During an interview, a dentist asks a patient, "You are not afraid of dentistry, are
you?" This is an example of which type of question?
A. Leading
B. Closed
C. Open
D. Funneling Correct Answer: A. Leading
To be effective in translating the roots of teeth, an orthodontic appliance must be
A. very gentle in action.
B. augmented with extraoral force.
