In the normal Knee, loads that are 2-4 times body weight are imposed on the tibiofemoral joint. 60% of the load passes through the medial compartment. In a unicompartmental OA, the altered limb alignment causes the load to be distributed more on the affected compartment, which may accelerate degenerative process and cause pain; Osteotomy redistributes the loads to the uninvolved compartment.
Any person below 60 years of age having Partial Knee Replacement Surgery (medial or lateral compartment) osteoarthritis of the knee, is well suited for this procedure.
The success rates at 10 years following High Tibial Osteotomy Surgery are produced when there have been an over correction of the Varus Deformity by 3 to 10 degrees. Progressive Osteoarthritis seems to be the reason for the deterioration of functional outcomes.
Older age at the time of the surgery