Details

Autor(en) / Beteiligte

• Kuster, M S
• Wood, G A
• Stachowiak, G W
• Gächter, A

Titel

Joint load considerations in total knee replacement

Ist Teil von

• Journal of bone and joint surgery. British volume, 1997-01, Vol.79 (1), p.109

Ort / Verlag

England

Erscheinungsjahr

1997

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Estimates of knee joint loadings were calculated for 12 normal subjects from kinematic and kinetic measures obtained during both level and downhill walking. The maximum tibiofemoral compressive force reached an average load of 3.9 times body-weight (BW) for level walking and 8 times BW for downhill walking, in each instance during the early stance phase. Muscle forces contributed 80% of the maximum bone-on-bone force during downhill walking and 70% during level walking whereas the ground reaction forces contributed only 20% and 30% respectively. Most total knee designs provide a tibiofemoral contact area of 100 to 300 mm2. The yield point of these polyethylene inlays will therefore be exceeded with each step during downhill walking. Future evaluation of total knee designs should be based on a tibiofemoral joint load of 3.5 times BW at 20 degrees knee flexion, 8 times BW at 40 degrees and 6 times BW at 60 degrees.