A. 10%
B. 30%
C. 60%
D. 90%
✅ The correct answer is option B. 30%.
Oral Histology
362. The successors of deciduous teeth develops form_______________?
A. Successional lamina
B. Dental lamina
C. Stellate reticulum
D. Neutral ectodermal cells
✅ The correct answer is option A. Successional lamina.
363. Fibres which continue from bone to ligament are_______________?
A. Sharpey’s fibres
B. Tome’s fibres
C. Ray’s fibres
D. All of the above
✅ The correct answer is option A. Sharpey’s fibres.
364. Maximum amount of phosphate is seen in_______________?
A. Bone
B. Enamel
C. Gingiva
D. Dentin
✅ The correct answer is option B. Enamel.
365. Which of the following is true___________?
A. Pulpal pressure is highest among body tissues
B. Majority of nerve that enter the pulp are non myelinated and are sympathetic in nature
C. Plexus of Rashkow or parietal layers of nerves is formed by network of peripheral axons located adjacent to cell rich zone
D. All of the above
✅ The correct answer is option D. All of the above.
366. Ectodermal cells in tooth bud are responsible for_______________?
A. Determination of shape of crown and root
B. Formation of periodontal ligament
C. Formation of cementum
D. Formation of pulp
✅ The correct answer is option A. Determination of shape of crown and root.
367. When osteoblast lay new bone from outside to inside in a osteon, the active formation area is called________________?
A. Haversion cone
B. Filling cone
C. Cutting cone
D. Howships cone
✅ The correct answer is option B. Filling cone.
368. Group of fibres, which resist the masticatory forces___________?
A. Dentogingival
B. Transeptal
C. Oblique
D. Horizontal
✅ The correct answer is option C. Oblique.
369. Normal interincisal distance is____________________?
A. 48 mm
B. 38 mm
C. 58 mm
D. 28 mm
✅ The correct answer is option A. 48 mm.
370. The anatomic crown is shorter than the clinical crown of a tooth in which of the following instances___________________?
A. Impaction
B. Gingivitis
C. Occlusal wear
D. Gingival recession
✅ The correct answer is option D. Gingival recession.