What is the amount of time required by erupting premolar to move through 1 mm of bone as measured on a bite – wing radigraph ?

Related Mcqs:

1. A new tooth is erupting in the mouth of a one and a half year old child. This tooth is most likely to be a decidous___________?

   A. Maxillary central incisor
   B. Mandibular lateral incisor
   C. Maxillary lateral incisor
   D. Maxillary canine

2. The cells, which are responsible for removal of bone matrix in bone resorption, are_____________?

   A. Osteoblast
   B. Fibrocytes
   C. Polymorphs
   D. Osteoclasts

3. Bone pain, bone, cyst, fractures and renal stones are characteristics of_____________?

   A. Hyperparathyroidism
   B. Cushing’s syndorme
   C. Multiple myeloma
   D. Marfan’s syndrome

4. Which of the following diseases of the bone characteristically exhibits (in contrast to the other three conditions) a single lesion in a single bone ?

   A. Central giant cell granuloma
   B. Osteopetrosis
   C. Paget’s disease of the bone
   D. Polyostotic fibrous dysplasia

5. Amber coloured tooth traslucency, blue sclerae and bone fragility and a history of pervious bone fractures are characteristic findings in_____________?

   A. Osteoporosis
   B. Osteogenesis imperfecta
   C. Osteitis deformans
   D. Osteitis fibrosa cystic

6. Eruption fails in this bone disease, as there is no bone resorption_______________?

   A. Primary hyperparathyroidism
   B. Phantom bone disease
   C. Paget’s disease
   D. Osteopetrosis

7. The contact area on the distal side of a maxillary first premolar is located _____________?

   A. Middle of the middle third with buccal embrasure wider than lingual
   B. Middle of the middle third with lingual embrasure wider than buccal
   C. Litter cervical to the junction of occlusal and middle third of the crown with wide occlusal embrasure
   D. Cervical third with buccal embrasure wider than lingual embrasure

8. The contact area on the distal surface of a maxillary first premolar should be placed in________________?

   A. Middle 3rd of proximal surface with lingual embrasure greater than the facial embrasure
   B. Occlusal 3rd of proximal surface with the lingual embrasure greater than facial embrasure
   C. Occlusal 3rd of proximal surface with facial embrasure greater than lingual embrasure
   D. Middle 3rd with facial embrasure greater than the lingual embrasure

9. Cervical cross section of maxillary first premolar is_____________?

   A. Dumbell
   B. Kidney shape
   C. Elliptical
   D. Oval

10. In the intercuspal position, the lingual cusp of maxillary 2nd premolar contacts the______________?

    A. Distal fossa of mandibular 2ndpremolar
    B. Mesial fossa of mandibular 1^st molar
    C. Distal marginal ridge of mandibular 2ndmolar
    D. Distal marginal ridge of mandibular 1st premolar