If cementum is not formed______________?
A. Ankylosis may occur
B. Exforliation of teeth occur
C. Delayed eruption
D. No change occurs
Oral Histology
Which of the following is true______________?
Which of the following is true______________?
A. The uncalcified matrix of cementum is called cementoid
B. Cementum contain type I collagen predominantly
C. Cementodentinal junction is sometimes scallopes in deciduous teeth and smooth in permanent teeth
D. All of the above
Acellular cementum is typically found in_____________?
Acellular cementum is typically found in_____________?
A. Coronal half of root
B. Apical half of root
C. Apex of root
D. Entire root
At the cemento enamel junction, which of the following occurs_____________?
At the cemento enamel junction, which of the following occurs_____________?
A. Cementum meets enamel
B. Cementum overlaps enamel
C. Cementum does not meet enamel
D. All of the above
Inorganic content of cementum is_____________?
Inorganic content of cementum is_____________?
A. Less than bone
B. More than bone
C. Equal to that of bone
D. More than that of enamel
Butt joint in cementoenamel junctions seen is _________% of cases?
Butt joint in cementoenamel junctions seen is _________% of cases?
A. 10%
B. 30%
C. 60%
D. 90%
Cementum_____________?
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
Matrix vesicles_______________?
Matrix vesicles_______________?
A. Are found in mantle dentin
B. Contain collagen
C. Produce alkaline phosphatase
D. Inhibit mineralization
One of the following statement is unique about circumpulpal dentine______________?
One of the following statement is unique about circumpulpal dentine______________?
A. Collagen fibers are oriented perpendicular to DEJ
B. Vonkorff fibers are present
C. Contain phosphophoryn
D. Requires matrix vesicle for mineralization
The most accepted theory for dentin sensitivity is: or Which of the following is the most accepted theory of transmission of dental sensation_____________?
The most accepted theory for dentin sensitivity is: or Which of the following is the most accepted theory of transmission of dental sensation_____________?
A. Transduction theory
B. Direct neural stimulation
C. Hydrodynamic theory
D. Hydrostatic theory