14 - Bone Healing

Question 1

What two things are needed to heal a bone

Answer 1

Stability and vascular supply

Question 2

2 kinds of bone healing

Answer 2

Primary and secondary

Question 3

Primary bone healing

Answer 3

Healing without callus formation

Question 4

The amount of calus formation is directly related to

Answer 4

Movement in the fracture after

Question 5

Strain

Answer 5

Measure of relative movement of a fracture gap under patient loading

Question 6

Primordial cell can develop into bone through

Answer 6

Directly or through cartilage model depending upon strain in fracture zone

Question 7

Strain formula

Answer 7

Change in gap / original gap

Question 8

In larger gaps, the strain

Answer 8

On individual cellls are reduced

Question 9

If your strain gap is 2 % should heal by

Answer 9

Primary

Question 10

If 20% should heal

Answer 10

Secondary bone healing

Question 11

Direct bone healing characteristics

Answer 11

Gap < 2 mm, no intermediate fibrous tissue, and no movement

Question 12

Direct bone healing, osteoclasts cut tunnel into

Answer 12

Cortical bone

Question 13

Direct bone healing - behind the osteoclasts,

Answer 13

Osteoblast lay down concentric lamellar of bone

Question 14

Primary bone healing is only for fractures you can

Answer 14

Compress

Question 15

Relative stability

Answer 15

Controlled movement at fracture site

Question 16

Indirect bone healing steps

Answer 16

Fibrocartilage - calcification - woven bone - lamellar bone - osteonal remodeling

Question 17

Requirements of secondary bone healing is

Answer 17

Blood supply, reduction in length alignment and rotation, and movement