Table 1 Tribological system analysis of the experimental setup (according to GfT, Gesellschaft für Tribologie Arbeitsblatt 7/2002 (http://www.gft-ev.de) [27]) (NaCl: Natriumchloride solution; FCS: fetal calf serum; HA: hyaluronic acid)
Native condition | Cartilage damage condition | Relubricated condition | |
|---|---|---|---|
Strain collective | |||
Form of movement | Sliding | Sliding | Sliding |
Sequence of movement | Oscillating | Oscillating | Oscillating |
Force | 100 – 400 N | 100 – 400 N | 100 – 400 N |
Velocity | 5°/s rotation | 5°/s rotation | 5°/s rotation |
Temperature | 22 °C | 22 °C | 22 °C |
Exposure time | 40 s | 40 s | 40 s |
Structure of the Tribosystem | |||
Body and Counterbody | Cartilage disc (5% cells, 95% matrix containing macromolecules and 80% water) | Cartilage disc (5% cells, 95% matrix containing macromolecules and 80% water) | Cartilage disc (5% cells, 95% matrix containing macromolecules and 80% water) |
Intermediate medium | Synovial fluid | NaCl vs. FCS vs. HA | |
Surrounding medium | Air | Air | Air |
Wear analysis | |||
Friction condition | Hydrodynamic and mixed mode friction | Boundary mode friction | Hydrodynamic and mixed mode friction |
Type of wear | Abrasion | Abrasion | Abrasion |