When osteoblast lay new bone from outside to inside in a osteon, the active formation area is called________________?

Related Mcqs:

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

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

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

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

3. 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

4. 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

5. 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

6. Dental anomaly of teeth associated with defective bone formation is seen in_______________?

   A. amelogenesis imperfecta
   B. dentinogenesis imperfecta
   C. Odontodysplasia
   D. Osteitis deformans

7. A 15 years old boy reports with a rapidly growing swelling of the mandible with intermittent pain patient history is that the swelling occurred after an episode of trauma Radiographs reveal formation of new subperiosteal bone producing Onion skin appearance The patient also has lip paresthesia elevated white blood cell count Based on the clinical and radiographic picture, one of the following condition could be considered in the provisional diagnosis_________________?

   A. Fracture of the jaw with cancellous bone formation
   B. Chronic suppurative osteomyelitis
   C. Burkitt’s Lymphoma
   D. Ewing’s sarcoma

8. Bony union taking place with formation of medullary callus without periosteal callus formation is______________?

   A. Primary union
   B. Secondary union
   C. Both of the above
   D. None of the above

9. The type of bone present in the labial area of anterior teeth is_________________?

   A. Cortical
   B. Cancellous
   C. Osteophytic
   D. Exophytic

10. Which of the following enzymes are involved in bone formation________________?

    A. Alkaline phosphatase and urease
    B. Catalase and phosphorylase
    C. Alkaline phosphatase and phosphorylase
    D. Acid phosphatase and catalase