Physiology: Fracture Bone Healing Flashcards Preview

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Flashcards in Physiology: Fracture Bone Healing Deck (6)
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1
Q

What causes hypertrophic non-union?

A

Excessive movement at the fracture site - abundant hard callus formation, but there is too much movement give the fracture chance to bridge the gap

2
Q

Define secondary bone healing

A

There is a gap at the fracture site which needs to be filled temporarily by cartilage (soft callus) to act as a scaffold for new woven bone to be laid down (hard callus)

3
Q

Name the cells that let down the bone matrix in the fracture healing process

A

Osteoblasts

4
Q

Name the cells that remove fracture debris and resorb the newly exposed bone ends

A

Macrophages and osteoclasts

5
Q

Define primary bone healing

A

Occurs where there is minimal fracture gap (less than about 1mm) and the bone simply bridges the gap with new bone from osteoblasts

6
Q

Name 2 possible causes of atrophic non-union

A

Lack of blood supply, too big a fracture gap