Showing posts with label Orthopedics. Show all posts
Showing posts with label Orthopedics. Show all posts

May 13, 2014


Types of bone fractures and difference between fracture, dislocation and sublaxation

What is the difference between fracture, dislocation, Fracture dislocation and sublaxation ? 

- Fracture : discontinuity of bone.
- Dislocation : disruption of the continuity of a joint.   " joint surfaces are no longer in continuity".

- Subluxation : partial disruption of the continuity of a joint.  " Joint surfaces are still opposed."
- Fracture dislocation : dislocation together with a fracture of one or more of the bones forming the joint.

What are the types of bone fracture ?

greenstick-tibia-fracture
According to Etiology

1. Traumatic fracture (major trauma):

. Direct: fracture occurs at the point of trauma. e.g. crush fracture.
. lndirect :
- Avulsion e.g. patella (due to separation of long process with its attached muscles as a result of sudden undue movement).
- Angulation. 
- Rotation.
- Compression " Burst fracture" e.g. vertebra.

2. Patholoqical fracture:

* A minor trauma to already weakened bone by pre-existing disease, by a degree
of stress or trauma . . The disease may be local e.g. metastasis or generalized e.g. osteoporosis.

3. Stress fracture (Fatigue fractures):

* Fractures that occur 2ry to repeated loads applied to the skeleton e.g. harsh fracture in 2nd & 3rd