- Friction occurs when 2 surfaces are in contact and in relative motion
- Coefficient of Friction is a ratio (thus always less than 1) of the reaction force to a load across the interface
- Coefficient of Friction for common implant interfaces :
|
|
cartilage – cartilage |
0.01- 0.02 |
|
|
metal – metal (dry) |
0.4 |
|
|
metal – metal (wet) |
0.15 – 0.35 |
|
|
metal – UHMWPE |
0.05 – 0.15 |