261. The radicular pulp is continous with tissues of the periapical area via the____________? A. Pulp canal B. Pulp chamber C. Mental foramen D. Apical foramen ✅ The correct answer is option D. Apical foramen.
262. Alveolar bone proper is also known as: or Which of the following is seen as lamina dura in an IOPA radiograph ? A. Lamina lucida B. Lamina densa C. Lamina propria D. Lamina dura ✅ The correct answer is option D. Lamina dura.
263. The cells of the dental pulp which are responsible for the deposition of reparative dentin are_________? A. Osteoblasts B. Odontoblasts C. Ameloblasts D. Osteocytes ✅ The correct answer is option B. Odontoblasts.
264. Basal bone is____________? A. That part of the bone embracing apices of root of teeth B. Lower border of the mandible C. Ramus of the mandible D. That part of the bone containing teeth ✅ The correct answer is option A. That part of the bone embracing apices of root of teeth.
265. 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 ✅ The correct answer is option C. Avascular & deviod of nervous tissue.
266. If cementum is not formed______________? A. Ankylosis may occur B. Exforliation of teeth occur C. Delayed eruption D. No change occurs ✅ The correct answer is option B. Exforliation of teeth occur.
267. The percentage of inorganic matter in fully developed enamel is about____________? A. 66% B. 76% C. 86% D. 96% ✅ The correct answer is option D. 96%.
268. Width of the periodontal ligament is least at______________? A. Cervical third B. Apical third C. Fulcrum of rotation D. It has uniform width ✅ The correct answer is option C. Fulcrum of rotation.
269. Epithelial cells which ultimately keratinize are known as_____________? A. Keratinizing cells B. Melanocytes C. Non-Keratinizing cells D. Clear cells ✅ The correct answer is option A. Keratinizing cells.
270. Trauma or excessive occlusal forces causes_____________? A. Hyperplasia of cementum B. Hypertrophy of cementum C. Resorption of cementum D. None of the above ✅ The correct answer is option C. Resorption of cementum.