NBDE Part II - 1993 Exam E| QUESTIONS
AND ANSWERS| 100% CORRECT
As radiographs are exposed, the heat of the filament determines the quantity of
electrons produced. The number of electrons, in turn, determines
A. the quantity of X rays produced.
B. the quality of X rays produced.
C. both quality and quantity of X rays produced. Correct Answer: A. the quantity
of X rays produced.
On a prepayment basis, dental patients receive care at specified facilities from a
limited number of dentists. This practice plan is classified as which of the
following?
A. Closed panel
B. Open panel
C. Group practice
D. Solo practice Correct Answer: A. Closed panel
Replacement resorption is characterized by
A. pain.
B. ankylosis.
C. apical pathosis.
D. rapid progression.
E. acute inflammation. Correct Answer: B. ankylosis.
Delayed eruption, blunted root apices, hypoplastic enamel, and other dental
manifestations of hypoparathyroidism, can be prevented by early treatment with
A. vitamin D.
B. iodine.
C. ADH.
D. insulin. Correct Answer: A. vitamin D.
The hamular notch is important in complete denture construction BECAUSE it
aids the dentist in positioning the maxillary posterior teeth.
,A. Both the statement and the reason are correct and related.
B. Both the statement and the reason are correct but NOT related.
C. The statement is correct, but the reason is NOT.
D. The statement is NOT correct, but the reason is accurate.
E. NEITHER the statement NOR the reason is correct. Correct Answer: C. The
statement is correct, but the reason is NOT.
Each of the following is a reason for beveling a preparation for restoration with
composite resins EXCEPT one. Which one is this EXCEPTION?
A. To expose more inorganic tooth structure
B. To increase the surface area of enamel for etching
C. To expose the ends rather than the sides of enamel rods
D. To enhance the enamo-resin marginal seal Correct Answer: A. To expose more
inorganic tooth structure
Which of the following cells are the MOST radioresistant to cell death?
A. Lymphocytes
B. Granulocytes
C. Erythroblasts
D. Epithelial cells
E. Muscle cells Correct Answer: E. Muscle cells
Which of the following is the most commonly used surgical procedure to correct
maxillary retrognathia?
A. C-osteotomy
B. LeFort I osteotomy
C. Inverted L osteotomy
D. Anterior maxillary osteotomy Correct Answer: B. LeFort I osteotomy
Which of the following describes osseointegrated implants?
A. They have a direct structural and functional connection with bone only at the
radiographic level of detection.
B. They are anchored directly to living bone as determined by radiographic and
light microscopic analyses.
C. They form a junctional epithelium with the surrounding tissue.
, D. They form a pseudo-periodontal ligament. Correct Answer: B. They are
anchored directly to living bone as determined by radiographic and light
microscopic analyses.
The most common type of active tooth movement in the primary dentition is
correction of which type of problem?
A. Vertical
B. Sagittal
C. Transverse
D. Space regaining in the maxillary arch
E. Space regaining in the mandibular arch Correct Answer: C. Transverse
A patient has a chronically tender, knife-edge mandibular residual ridge. In
fabricating a complete denture for this patient, a dentist should consider which of
the following?
A. Maximal extension of the denture--to distribute forces of occlusion over a
greater area
B. Minimal extension of the denture--to limit tenderness to a smaller area
C. Decreased occlusal vertical dimension--to decrease biting forces
D. A broad occlusal table--to provide a firmer contact in eccentric jaw relations
Correct Answer: A. Maximal extension of the denture--to distribute forces of
occlusion over a greater area
Which of the following most affects curing of a light-activated composite resin?
A. Increment thickness
B. Shade of composite
C. Length of exposure Correct Answer: A. Increment thickness
A patient presents with spontaneous necrotizing ulcers of the oral cavity. The
WBC is 1,986, while the differential CBC reveals lymphocytes--68%, monocytes--
28%, polymorphonuclear leukocytes--2%, eosinophils--l%, and basophils--l%.
Which of the following diagnoses is the MOST appropriate for this patient?
A. Leukemia
B. Infectious mononucleosis
C. Agranulocytosis
D. Recurrent aphthous ulcers Correct Answer: C. Agranulocytosis
AND ANSWERS| 100% CORRECT
As radiographs are exposed, the heat of the filament determines the quantity of
electrons produced. The number of electrons, in turn, determines
A. the quantity of X rays produced.
B. the quality of X rays produced.
C. both quality and quantity of X rays produced. Correct Answer: A. the quantity
of X rays produced.
On a prepayment basis, dental patients receive care at specified facilities from a
limited number of dentists. This practice plan is classified as which of the
following?
A. Closed panel
B. Open panel
C. Group practice
D. Solo practice Correct Answer: A. Closed panel
Replacement resorption is characterized by
A. pain.
B. ankylosis.
C. apical pathosis.
D. rapid progression.
E. acute inflammation. Correct Answer: B. ankylosis.
Delayed eruption, blunted root apices, hypoplastic enamel, and other dental
manifestations of hypoparathyroidism, can be prevented by early treatment with
A. vitamin D.
B. iodine.
C. ADH.
D. insulin. Correct Answer: A. vitamin D.
The hamular notch is important in complete denture construction BECAUSE it
aids the dentist in positioning the maxillary posterior teeth.
,A. Both the statement and the reason are correct and related.
B. Both the statement and the reason are correct but NOT related.
C. The statement is correct, but the reason is NOT.
D. The statement is NOT correct, but the reason is accurate.
E. NEITHER the statement NOR the reason is correct. Correct Answer: C. The
statement is correct, but the reason is NOT.
Each of the following is a reason for beveling a preparation for restoration with
composite resins EXCEPT one. Which one is this EXCEPTION?
A. To expose more inorganic tooth structure
B. To increase the surface area of enamel for etching
C. To expose the ends rather than the sides of enamel rods
D. To enhance the enamo-resin marginal seal Correct Answer: A. To expose more
inorganic tooth structure
Which of the following cells are the MOST radioresistant to cell death?
A. Lymphocytes
B. Granulocytes
C. Erythroblasts
D. Epithelial cells
E. Muscle cells Correct Answer: E. Muscle cells
Which of the following is the most commonly used surgical procedure to correct
maxillary retrognathia?
A. C-osteotomy
B. LeFort I osteotomy
C. Inverted L osteotomy
D. Anterior maxillary osteotomy Correct Answer: B. LeFort I osteotomy
Which of the following describes osseointegrated implants?
A. They have a direct structural and functional connection with bone only at the
radiographic level of detection.
B. They are anchored directly to living bone as determined by radiographic and
light microscopic analyses.
C. They form a junctional epithelium with the surrounding tissue.
, D. They form a pseudo-periodontal ligament. Correct Answer: B. They are
anchored directly to living bone as determined by radiographic and light
microscopic analyses.
The most common type of active tooth movement in the primary dentition is
correction of which type of problem?
A. Vertical
B. Sagittal
C. Transverse
D. Space regaining in the maxillary arch
E. Space regaining in the mandibular arch Correct Answer: C. Transverse
A patient has a chronically tender, knife-edge mandibular residual ridge. In
fabricating a complete denture for this patient, a dentist should consider which of
the following?
A. Maximal extension of the denture--to distribute forces of occlusion over a
greater area
B. Minimal extension of the denture--to limit tenderness to a smaller area
C. Decreased occlusal vertical dimension--to decrease biting forces
D. A broad occlusal table--to provide a firmer contact in eccentric jaw relations
Correct Answer: A. Maximal extension of the denture--to distribute forces of
occlusion over a greater area
Which of the following most affects curing of a light-activated composite resin?
A. Increment thickness
B. Shade of composite
C. Length of exposure Correct Answer: A. Increment thickness
A patient presents with spontaneous necrotizing ulcers of the oral cavity. The
WBC is 1,986, while the differential CBC reveals lymphocytes--68%, monocytes--
28%, polymorphonuclear leukocytes--2%, eosinophils--l%, and basophils--l%.
Which of the following diagnoses is the MOST appropriate for this patient?
A. Leukemia
B. Infectious mononucleosis
C. Agranulocytosis
D. Recurrent aphthous ulcers Correct Answer: C. Agranulocytosis
