671. Dentin is a variety of Connective tissue because it:
A. is elastic and contains mucopolysaccharides.
B. contains collagen fibers and cell processes derived from mesenchyme.
C. contains inorganic cells.
C. has few cells and much intercellular material.
672. Cementum is a tissue that:
A. provides attachment of periodontal ligament fibers.
B. is easily resorbed than bone.
C. it contains blood vessels.
D. it contains neural receptors.
673. Cementum deposition cervically on enamel surface is due to:
A. premature degeneration of epithelial root sheath of Hertwig.
B. loss of reduced enamel epithelium.
C. persistence of epithelial root sheath of Hertwig.
D.cementoblasts coming from dental sac.
674. Neonal line is present in:
A. enamel and cementum.
B. dentin and cementum.
C. enamel and dentin.
D.non of the above.
675. Obliteration of dentinal tubules by minerals will result in:
A. formation of dead tracts.
B. formation of secondary dentin.
C. formation of sclerosed dentin.
D. formation of irregular or reparative dentin.
676. Age changes will increase:
A. dentin sclerosis.
B.interglobular dentin.
C. in cementum thickness.
D. Tome’s granular layer.
677. formation of matrix vesicles in calcification of dentin is limited to:
A.circumpulpal dentin.
B. Mantle dentin.
C. all types of dentin.
D.non of the above.
678. Cementum may cover part of the enamel due to:
A. Premature differentiation of cementoblasts.
B. Destruction of the reduced enamel epithelium covering this part.
C. Malfunctioning of the maturativeameloblasts.
D. Premature destruction of the epithelial root sheath of Hertwig.
679. Which of the following cell is responsible for cementogenesis?
A.Ameloblast.
B. Osteoblast.
C.Cementoblast.
D.Odontoblast.
680. Which of the following is true about cementum? It:
A. Provides nutrients to secondary dentin in the root.
B. Provides for the attachment of principal periodontal fibers.
C. Contains neural receptors.
D. Is more easily resorbed than bone.
NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU