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Open-wedge high tibial osteotomy (OWHTO) is effective in treating medial compartment osteoarthritis. The association between body mass index (BMI) and outcomes following OWHTO is being debated. This study compared radiographic and clinical outcomes between patients with preoperative overweight, obesity, and normal BMI following OWHTO for medial compartment osteoarthritis. In total, 123 patients (123 knees) who underwent OWHTO for medial compartment osteoarthritis were enrolled and were divided into normal-BMI (18.5−24.9 kg/m2), overweight (25−29.9 kg/m2), and obese (>30 kg/m2) groups based on body mass index. The numeric rating scale for pain, mechanical tibiofemoral angle (mTFA), tibia tilting angle (TTA), and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) for function were evaluated preoperatively and at postoperative follow-ups. The improvements of clinical and radiological outcomes in normal-BMI, overweight, and obese groups were not significantly different. The incidence of soft tissue irritation, wound infection, nonunion, and conversion to total knee arthroplasty were not significantly different between groups.The clinical and radiological outcomes in patients with preoperative overweight, obesity, and normal-BMI were not significantly different. Preoperative overweight and obesity thus has no effect on outcomes following OWHTO during the two years follow-up period. These findings cannot be generalized to patients with morbid obesity.

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Review question / Objective: This meta-analysis was conducted to compare outcomes among different types of graft for revision anterior cruciate ligament reconstruction. Condition being studied: Results on the outcomes of different types of grafts used in revision anterior cruciate ligament (ACL) reconstruction are valuable to surgeons because primary ACL reconstruction limits the types of grafts available for revision. Both autograft and allograft have been shown to improve clinical outcomes in previous studies of revision ACL reconstruction. The use of allografts reduces operation time and eliminates the risk of donor site morbidity, but allografts are more expensive than autografts. To date, two meta-analyses of revision ACL reconstruction have compared outcomes between autograft and allograft in younger patients. One meta-analysis reported that autograft produced superior outcomes, such as lower postoperative laxity, lower complication rate, and lower reoperation rate. However, if only non-irradiated allografts were considered, the lower reoperation rate was reported in allograft. The other meta-analysis reported that failure rates were not different between autograft and allograft.

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