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  • Title: Union of medial opening-wedge high tibial osteotomy using a corticocancellous proximal tibial wedge allograft.
    Author: Yacobucci GN, Cocking MR.
    Journal: Am J Sports Med; 2008 Apr; 36(4):713-9. PubMed ID: 18227231.
    Abstract:
    BACKGROUND: Medial opening-wedge high tibial osteotomy has been gaining popularity in recent years, and autogenous iliac crest bone is the gold standard graft; however, the surgical time, risk, and morbidity associated with its harvest are significant. The question of a satisfactory bone-graft substitute has yet to be clearly answered. HYPOTHESIS: A corticocancellous proximal tibial wedge allograft is a satisfactory graft choice when evaluating union in medial opening-wedge high tibial osteotomy. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Fifty consecutive patients who underwent medial opening-wedge high tibial osteotomy from May 2001 to May 2006 were included in the study. The amount of correction ranged from 5 degrees to 17.5 degrees, with a mean of 10.1 degrees. Forty patients had fixation with a stainless steel plate and screws and 10 with a titanium interlocking plate and screws. The graft used in each case was a corticocancellous proximal tibial wedge allograft. No osteoinductive supplements were added. Patients started continuous passive motion immediately after surgery and began weightbearing at 8 weeks (if bone healing was progressing). Clinical and radiographic evaluation was performed monthly until full union and twice thereafter. Follow-up ranged from 5 months to 6 years, with a mean of 2.1 years. RESULTS: The average time to bone union was 12.1 weeks (range, 8-24). Two patients (4%) had a nonunion, defined as not healed at 6 months. Only 1 patient (a nonunion patient) had loss of correction at the osteotomy site, defined as collapse of the opening wedge (this occurred at 6 months after surgery). There were no cases of infection, no wound-healing problems, no cases of arthrofibrosis, and no neurovascular injuries. CONCLUSION: When union is assessed, a corticocancellous proximal tibial wedge allograft is a satisfactory graft choice in medial opening-wedge high tibial osteotomy.
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