When displacement intertrochanteric osteotomy is performed for osteoarthritis of the hip, the factor "displacement" does not affect at all the pressure exerted on the articular faces of the hip (basic aim in prevention and treatment of osteoarthritis). The good effect of osteotomy should be attributed to the factor "biological stimulation" or "blood circulation". Therefore displacement should be avoided because it causes complication (pseudarthrosis) and difficulties when eventually total arthroplasty has to be performed which is (sooner or later) necessary in most cases.
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