1989 NBDE Test microbio/pathology/histology/dental anatomy and occlusion

Arthus Reaction

Which of the following drugs is likely to aid in treating or preventing influenza in high risk subjects during epidemics?A) StilbamidineB) AcyclovirC) AmantadineD) Amphotericin BE) Griseofulvin

In the photomicrograph of enamel, the degree of calcification of C, compared to that of D, is
A) lower.B) similar.C) higher.

Which of the following sagittal views of the Posselt's envelope is the correct tracing for a patient with coincidence of centric occlusion and centric relation?

Which of the following positions would yield the smallest measurement of vertical dimension?
A) Edge-to-edge
B) Reverse overlap
C) Retruded contact
D) Maximum intercuspation

Fordyce's granules/spots in mucous membrane of cheek

Moving the mandible from a maximum intercuspal position to a retruded contact position usually results in

A) all of these.
B) increased occlusal vertical dimension.
C) increased horizontal overlap.
D) decreased vertical overlap.

Which of the following characterizes the alveolar bone proper of a tooth socket?
A) It consists of compact bone, shows dark on a radiograph, and contains Sharpey's fibers.
B) It resorbs when subjected to pressure, and contains numerous openings through which vessels pass.
C) It contains haversian systems, has collagen fibers in its matrix, and is about 96 per cent inorganic salts.
D) It serves to attach free gingival periodontal ligament fibers, and is a part of the total tooth attachment apparatus.

A broad, flat facet existing on the outer aspect of the mesiolingual cusp of a maxillary first molar, and running in a mesiolingual to distofacial direction, was probably caused by which of the following contacting movements?

A) ProtrusiveB) WorkingC) Lateral protrusiveD) Non-working

Which of the following premolars has a mesial marginal ridge that is more cervically located than its distal marginal ridge?
A) Mandibular first
B) Mandibular second
C) Maxillary second
D) Maxillary first

During delayed hypersensitivity reactions, sensitized small lymphocytes produce
A) leukotrienes.B) lymphokines.C) antibodies.D) none of these.E) histamine.

Collagen degradation observed in chronic periodontal disease may result directly from the action of collagenase enzymes of oral microbial origin. Such enzymes have been demonstrated as component systems of
A) Streptococcus faecalis.
B) Leptothrix buccalis.
C) Bacteroides species
D) Veillonella alcalescens.
E) Entamoeba gingivalis.

The spacing between anterior teeth in the primary dentition is most frequently caused by
A) the growth of the dental arches.
B) the pressure from succedaneous teeth.
C) thumb-sucking.
D) tongue thrusting.

The first succedaneous tooth to erupt is the
A) primary mandibular first molar.
B) primary mandibular central incisor.
C) maxillary central incisor.
D) permanent mandibular central incisor.
E) permanent mandibular first molar.

The cervical line on adult teeth has the greatest depth of curvature toward the incisal on the
A) facial aspect.
B) lingual aspect.
C) mesial aspect.
D) distal aspect.
E) dentinoenamel junction.

Behcet's Syndrome

Which of the following enteric microorganisms is NOT typically found in normal human intestinal flora?A) Salmonella typhi
B) Bacteroides fragilis
C) Escherichia coli
D) Pseudomonas aeruginosa
E) Proteus vulgaris

In a longitudinal section of a premolar crown, the enamel is thickest in the
A) occlusal third.B) cervical third.C) junction of the cervical and middle thirds.D) middle third.

The type of infection most commonly transmitted by transfusion of properly screened blood is
A) type B hepatitis.
B) non-A non-B hepatitis.
C) type A hepatitis.
D) cytomegalovirus.

The connective tissue sheath that surrounds a muscle as a whole and is synonymous with the gross anatomic deep fascia is the

A) periosteum.B) perimysium.C) perichondrium.D) endomysium.E) epimysium.

Salivary, sweat, sebaceous, and von Ebner's glands all have in common the characteristic of being

A) exocrine.B) simple.C) holocrine.D) merocrine.E) compound.

In an ideal intercuspal position, the cusp tip of a permanent maxillary canine should contact
A) both mandibular canine and first premolar.
B) no other tooth.
C) the mandibular lateral incisor only.
D) the mandibular canine only.
E) the mandibular first premolar only.

Which of the following primary teeth has the smallest faciolingual dimension of its crown?
A) Maxillary lateral incisor
B) Mandibular lateral incisor
C) Maxillary canine
D) Mandibular central incisor

The lingual height of contour on a permanent mandibular second molar is located

A) in the cervical third.
B) at the junction of the middle and occlusal thirds.
C) in the occlusal third.
D) in the middle third.
E) at the junction of the cervical and middle thirds.

Connective tissue proper is characterized as having
A) more intercellular material than cells.
B) little tissue fluid.
C) sensitivity as its main function.
D) poor reparative ability.

Prolonged administration of streptomycin may result in damage to which of the following nerves?

A) FacialB) TrigeminalC) OpticD) Auditory

The non-working pathway of the maxillary cusps on the mandibular posterior teeth is toward the

A) mesiolingual.B) distofacial.C) distolingual.D) mesiofacial.

Properdin

Proprioceptors are found in each of the following EXCEPT
A) skeletal muscle.
B) the pulp of a tooth.
C) the temporomandibular joint.
D) gingiva.
E) the periodontal ligament

Which of the following permanent incisors most frequently have concave areas on both mesial and distal root surfaces?

(a) Maxillary central; (b) Mandibular central; (c) Maxillary lateral; (d) Mandibular lateral

In a patient with a left canine protection, the mesiolingual surface of the maxillary right first molar contacts the distofacial surface of the mandibular right first molar during a left lateral excursion. This contact is
A) normal, and a non-working side interference.
B) evidence of group function.
C) a working side interference.
D) a non-working side interference.
E) normal.

In an ideal permanent tooth relationship, the tip of a mandibular canine in lateral excursion passes
A) mesial to the tip of the maxillary canine cusp.
B) directly in line with the maxillary canine cusp tip.
C) distal to the tip of the maxillary canine cusp.
D) through the embrasure between the maxillary canine and first premolar.