Effect of RO On GB During TKR Severe Varus Deformity

Not Applicable

• Conditions: Genu Varum; Knee Osteoarthritis
• Interventions: Other: tibial reduction osteotomy in total knee replacement

• Registration Number: NCT03065738
• Lead Sponsor: Assiut University

Brief Summary

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

Study Timeline

• Study Start: 2017-01-01
• Study First Submitted: 2017-01-31
• Status Verified: 2017-02
• Study First Submitted QC: 2017-02-27
• Study First Posted: 2017-02-28
• Last Update Submitted: 2017-03-09
• Last Update Posted: 2017-03-13
• Primary Completion: 2018-01-01
• Study Completion: 2018-02-01

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

• Patients with severe varus deformity more than 15 degrees (long film-mechanical axis)
• Patients with bone defect of medial tibial condyle

Exclusion Criteria

• Patients with extra-articular deformity
• Patients with valgus deformity

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
osteoarthritis knee ,severe varus deformity	tibial reduction osteotomy in total knee replacement	reduction osteotomy in total knee replacement

Primary Outcome Measures

Name	Time	Method
HKA angle	immediate post operative	standing A.P radiograph

Secondary Outcome Measures

Name	Time	Method
functional outcome by knee society score	one year follow up	by knee society score

Trial Locations

Locations (1)

Assiut University School of medicine Vice Dean for Research and Post-Graduate Studies; 🇪🇬 Assiut, Egypt