Effect Of Reduction Osteotomy On Gap Balancing During Total Knee Replacement For Severe Varus Deformity

Brief Title

Effect of RO On GB During TKR Severe Varus Deformity

Official Title

Effect Of Reduction Osteotomy On Gap Balancing During Total Knee Replacement For Severe Varus Deformity

Brief Summary

Effect Of Reduction Osteotomy On Gap Balancing During Total Knee Replacement For Severe Varus<br /> Deformity

Detailed Description

Severe varus deformity with a tibio femoral angle of 15° or more as measured on full-length
weight-bearing radiographs necessitates extensive release of the medial structures to gain
neutral limb alignment during total knee arthroplasty (TKA). progressive releases of the
medial structures are performed until medial and lateral envelopes are equally balanced. This
technique, however, faces a risk of over-release and subsequent instability, ultimately
resulting in the use of a thicker polyethylene insert or even a constrained-type prosthesis.
Reduction osteotomy is known as a soft tissue-sparing technique for soft tissue balancing,
and it is capable of reducing the amount of release required to balance the knee and of
preventing over release of medial structures. Dixon et al . and Mullaji et al . proposed the
effectiveness of down-sizing the tibial component in the case of knees with severe varus
deformity Aim of the work: Assess the effect of reduction osteotomy on gab balancing during
total knee arthroplasty for severe varus deformity -What is the amount of deformity
correction achieved with reduction osteotomy during TKA in varus knees? - What is the
correlation of amount of deformity correction achieved to the amount of bone osteotomized and
the degree of varus deformity?

Outcome Measures

Outcome measures are the tests that investigators perform to prove whether or not a treatment being tested in a clinical trial is having any effect.