High Tibial Osteotomy (HTO)
This is the most common osteotomy performed around the knee and is often performed using an opening wedge technique. It is used when there is OA on the medial (inner) side of the knee. Most often, an opening wedge is created on the medial side of the upper tibia to push the weight on to the outer (lateral) compartment of the knee.
Distal Femoral Varus Osteotomy (DFVO)
This is used when there is arthritis in the outer (lateral) compartment of the knee. In order to transfer the pressure to the healthier medial side an opening wedge is made on the lateral part of the lower femur bone.
Tibial Tubercle Osteotomy (TTO)
This osteotomy is used for arthritis or instability of the patellofemoral joint. This operation is discussed in more detail under the section on Patellofemoral Instability.