Which of the following cells begin forming spongy bone during bone fracture repair?
a) fibroblasts
b) oesteocytes and osteoclasts
c) osteoblasts
d) both a and c
Which of the following splints the broken bone?
a) cartilaginous callus
b) hematoma
c) bony callus
d) all of these
Explanation: cartilaginous callus consists of collagen fiber, matrix, spongy bone and cartilaginous matrix that later calcifies
In how much time, the fibrocartilaginous callus is gradually converted into bony callus of spongy bone?
a) within a day
b) within week
c) within 6-8weeks
d) within 10-12 weeks
Which of the following process continues until a firm union is formed during fracture repair?
a) hematoma formation
b) cartilaginous callus formation
c) bony callus formation
d) all of these
Explanation: bony callus formation continues about 2 months
Which of the following is the last stage of bone fracture repair?
a) hematoma formation
b) cartilaginous callus formation
c) bony callus formation
d) bone remodeling
Explanation: during this stage, the compact bone is laid down to reconstruct the shaft walls and resembled that of the original unbroken bony region
Joint Injuries:
