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Distraction osteogenesis for nonunion after high tibial osteotomy
S Robert Rozbruch1, John E Herzenberg, Kevin Tetsworth
1Hospital for Special Surgery, Limb Lengthening Service, New York, NY, USA.
Clinical Orthopaedics and Related Research
|January 25, 2002
Summary
Distraction osteogenesis successfully treated nonunion and deformity after high tibial osteotomy. This minimally invasive method achieved bone union, corrected leg length discrepancy, and improved knee function, avoiding total knee replacement.
Area of Science:
- Orthopedic Surgery
- Regenerative Medicine
- Biomechanical Engineering
Background:
- High tibial osteotomy (HTO) can lead to hypertrophic nonunion with angular deformity and leg length discrepancy.
- Coventry-style HTO complications necessitate effective treatment strategies.
Purpose of the Study:
- To evaluate distraction osteogenesis for treating hypertrophic nonunion with angular deformity and shortening post-HTO.
- To assess the efficacy of simultaneous correction of nonunion, malalignment, and leg length discrepancy.
Main Methods:
- Retrospective review of five consecutive patients with post-HTO nonunion and deformity.
- Application of distraction osteogenesis for simultaneous correction of nonunion, malalignment, and leg length discrepancy.
Main Results:
- Achieved bony union in an average of 4.4 months.
- Significantly improved Hospital for Special Surgery (HSS) knee scores (42 to 89).
- Corrected coronal plane deformity (13 degrees) and leg length discrepancy (2.3 to 0.5 cm).
- Increased metaphyseal bone stock (43%) and maintained normal Insall-Salvati ratio.
Conclusions:
- Distraction osteogenesis is a minimally invasive and successful treatment for nonunion and deformity after HTO.
- The procedure leads to bony union, deformity correction, and leg length equalization.
- This technique may prevent the need for total knee replacement and potentially simplify future procedures.