Which of the following is not the principle fibre group of the periodontal ligament___________?
A. Horizontal
B. Oblique
C. Alveolar crest
D. Transseplat
Periodontal Ligament
A special feature of the periodontal ligament fibroblasts is______________?
A special feature of the periodontal ligament fibroblasts is______________?
A. The number or organelles
B. Presence of actin fibres and shape change
C. size of the cells
D. Collagen fibre formation
The component of future T.M.J shows development at _____________?
The component of future T.M.J shows development at _____________?
A. 6 weeks
B. 10 weeks
C. 18 weeks
D. 16 weeks
Centre of the disc in TMJ is_____________?
Centre of the disc in TMJ is_____________?
A. Avascular
B. Devoid of nervous tissue
C. Avascular & deviod of nervous tissue
D. None of the above
Narrowing of periodontal ligament in labially placed mandibular canine with age is due to_____________?
Narrowing of periodontal ligament in labially placed mandibular canine with age is due to_____________?
A. Due to deposition of cementum and bone
B. Down growths of gingival epithelium
C. Gingival cysts formed from cell rests
D. Reversal of function of horizontal and oblique fibres
The main function of horizontal fibres of P.D ligament is____________?
The main function of horizontal fibres of P.D ligament is____________?
A. Prevent extrusion
B. Prevent rotation
C. Maintains the mesiodistal width
D. All of the above
The rest of malassez in the periodontal ligament are derived from_____________?
The rest of malassez in the periodontal ligament are derived from_____________?
A. Dental pulp
B. Lamina propria
C. Odontogenic epithelium
D. Vestibular lamina
The most abundant group of fibres in the PDL are_____________?
The most abundant group of fibres in the PDL are_____________?
A. Trans-septal
B. Horizontal
C. Oblique
D. Apical
True about osteoclasts_____________?
True about osteoclasts_____________?
A. Monocytes are precursor cells of osteoclasts
B. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border
C. Contain lysosomes with acid phosphates
D. All of the above are true
Sharpey’s fibres are present in_______________?
Sharpey’s fibres are present in_______________?
A. Bone
B. Periosteum
C. Periodontal ligament
D. All of the above