Medical MCQs

5099 MCQs  (Page 253 of 510)

Which of the following statement is true______________?
A. Cementum is thinnest at cej (20-50μm)
B. Cementum is thickest towards the apex (150-200μm)
C. The apical foramen is surrounded by cementum
D. All of the above
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
Matrix vesicles_______________?
A. Are found in mantle dentin
B. Contain collagen
C. Produce alkaline phosphatase
D. Inhibit mineralization
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
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
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
Acellular cementum is typically found in_____________?
A. Coronal half of root
B. Apical half of root
C. Apex of root
D. Entire root