Question: The enamel of the posterior teeth is thickest at____________?

• 1. Cervical third of buccal surface
• 2. Middle third of buccal surface
• 3. Middle third of lingual surface
• 4. Occlusal surface

Question: perikymata are the external surface manifestations of_____________?

• 1. Enamel rods
• 2. Incremental lines of retzius
• 3. Nasmyth’s membrane
• 4. Pellicle

Question: Periodontal ligament has predominantly_________?

• 1. Type II collagen fibres
• 2. Oxytalan fibres
• 3. Elastic fibres
• 4. Type I collagen fibres

Question: Which of the following groups of fibres are not attached to alveolar bone ?

• 1. Transseptal
• 2. Horizontal
• 3. Oblique
• 4. Apical

Question: The most abundant principle fibre group in periodontal ligament is____________?

• 1. Horizontal
• 2. Transeptal
• 3. Apical
• 4. Oblique

Question: In mammals independent and tough suspension for teeth is provided by____________?

• 1. Alveolar sockets
• 2. Cementum
• 3. Gubernacular cords
• 4. Periodontal membrane

Question: Group of fibres, which resist the masticatory forces___________?

• 1. Dentogingival
• 2. Transeptal
• 3. Oblique
• 4. Horizontal

Question: Fibres of periodontal ligament embedded in the bone are_____________?

• 1. Sharpey’s fibres
• 2. Tomes fibres
• 3. Elastic fibres
• 4. Ray’s fibres

Question: The attached apparatus of tooth is composed of______________?

• 1. Gingiva, cementum and alveolar bone
• 2. Gingiva and cementum
• 3. Cementum and periodontal ligament
• 4. Peridontal ligament the cementum and the alveolar bone

Question: Age changes in periodeontal ligament include which of the following ?

• 1. Increased fibroplasia
• 2. Increased vascularity
• 3. Increased thickness
• 4. Decreased in number of cementicles