High Tibial Osteotomy Survivorship: A Population-Based Study.

Area of Science:

• Orthopedic Surgery
• Biomechanical Engineering
• Rehabilitative Medicine

Background:

• High tibial osteotomy (HTO) is a surgical procedure designed to address early-stage medial compartment osteoarthritis in knees with varus alignment.
• This study focuses on evaluating the outcomes of HTO in a large patient cohort.

Purpose of the Study:

• To assess the midterm and long-term effectiveness of high tibial osteotomy (HTO).
• To identify factors influencing the success and failure rates of HTO in a broad patient population.

Main Methods:

• A case-control study design was employed, utilizing data from the California Office of Statewide Health Planning and Development (2000-2014).
• Patients undergoing HTO were analyzed, excluding those with specific conditions like infectious arthritis or malignancy. Failure was defined as conversion to knee arthroplasty.
• Statistical analyses included univariate and multivariate assessments, with Kaplan-Meier survivorship estimates calculated for 5- and 10-year periods.

Main Results:

• Out of 1576 HTO procedures, 358 required conversion to arthroplasty within 10 years.
• Patients converted to arthroplasty were significantly older, had higher rates of hypertension, and more comorbidities.
• Increased age and female sex were identified as risk factors for conversion to arthroplasty, with 5- and 10-year survivorship rates of 80% and 56%, respectively.

Conclusions:

• High tibial osteotomy (HTO) can achieve long-term implant survival in appropriately selected patients with knee osteoarthritis.
• Patient selection for HTO should carefully consider age, sex, and the presence of comorbidities to optimize outcomes and minimize revision rates.