1.103 Fracture repair Flashcards Preview

TSM > 1.103 Fracture repair > Flashcards

Flashcards in 1.103 Fracture repair Deck (18):
1

Give an example of a fracture of compact bone?

Femoral shaft

2

What is cancellous bone?

Spongy bone - femoral metaphyses

3

What is a fracture in the immature (woven) bone called?

Fracture callus

4

What are Volkmann's canals and where are they found?

Contain blood vessels in cortical bones (femoral shaft)

5

Which bone shave high and low turnover rate?

Crotical - low turnover
cancellous - spongy - high turnover

6

What is the bone matrix made up of?

Organic - 40%
Collagen type 1
Proteoglycans
Inorganic - 60%
Calcium and phosphate type compounds

7

What is a basic multicellular unit?

Remodelling occurs via small packets of osteoblasts and osteoclasts

8

What is Wolf's law?

Increased mechanical stress gains bone density
Fracture patients should weight bear

9

What are the stages of fracture healing?

Haemorrhage
Inflammation
Callus repair
Callus consolidation
Remodelling

10

What happens in the inflammation stage of fracture repair?

Acute inflammatory response
Out pouring inflammatory exude
Proteins
Fibroblasts
Hemapoeitic cells
Growth factors
Granulation tissue around fracture ends
Immature osteoblasts

11

What is the purpose of inflammation?

Essential for bone repair
Removes dead tissues - macrophages
Enables correct cells to be recruited in the area

12

What is callus formation?

Immature bone - 2 weeks after fracture
Chondronergic and osteogenic cells proliferate
Thick cellular mass - Callus
This splints the bone ends
Osteoclasts absorb and mop up damage done

13

What is callus consolidation?

Immature (callus) bone transformed into mature - lamellar - bone

14

What is a stress fracture?

abnormal repetetive stress

15

What is a fatigue fracture?

repetetive stress on an abnormal bone - osteoporosis

16

What is a pathological fracture?

Pain prior to fracture - infection

17

What is primary bone healing? (direct)

Direct remodelling
Direct bone healing
Rigid fixation
No callus
Absolute stability

18

What is secondary (indirect) bone healing?

Normal biological healing
Callus formation
A mixture of endochondral and intramembronous ossification