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.Management Sciences
Category: Oral Histology
The odontoblasts killed during cavity preparation are derived from_____________?
A. Unaffected odontoblasts from the pulp
B. Undifferentiated cells
C. Histocytes
D. Osteoblasts
Propriceptors are seen in all except______________?
A. Skeletal muscle
B. TMJ
C. Pulp
D. None of the above
Which of the following is correct?
A. Reparative dentin is characterized by having fewer and more twisted tubules than normal dentin and may include odontoblasts
B. Dead tracts appear black in transmitted and white in reflected ligth
C. Sclerotic transparent dentin appears transparent or light in transmitted light and dark in reflected light
D. All of the above
Neonatal lines are seen in_______________?
A. Enamel of deciduous incisiors
B. Enamel of permanent incisors
C. Enamel of premolars
D. Dentin of all teeth, as if is formed first
Tooth buds of permanent mandibular incisors are situated_____________?
A. Lingual to primary teeth
B. Inferior to primary teeth
C. Labial to primary teeth
D. A and B
1st formed dental tissue______________?
A. Enamel
B. Dentin
C. Cementum
D. Bone
Which of the following groups of fibres are not attached to alveolar bone ?
A. Transseptal
B. Horizontal
C. Oblique
D. Apical
Tooth eruption is due to______________?
A. Osteoclastic activity
B. Proliferation of cells at crypt
C. Exforliation of primary tooth
D. Eruptive force
Cementum_____________?
A. Is derived from the sheath of hertwig
B. Is acellular in the apical third of the tooth
C. Often overlaps the enamel
D. Does not contain collagen fibres
Reestablishing the former outline of the root surface is_____________?
A. Anatomic repair
B. Functional repair
C. Physiological repair
D. Hyperplasia
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