Abstract
PurposeThe aim of this retrospective study was to investigate the effectiveness of medial unicompartmental knee arthroplasty (UKA) by showing the results of the radiological and clinical outcomes of the patients.Materials and methodsSeventy-two knees of 54 patients who underwent UKA between September 2005 and March 2011 for medial knee arthritis with a minimum follow-up of six months were evaluated. Range of motion (ROM), Hospital for Special Surgery (HSS) knee score, Knee Society Score (KSS), and Oxford Knee Score (OKS) were investigated both preoperatively and postoperatively. On the other hand, Oxford radiographic evaluation criteria were used to evaluate prostheses radiologically at the final follow-up.ResultsThe average age was 53.4 years (47 to 79 years). The average follow-up time was 39.8 months (8 to 72 months). There was a significant difference between preoperative and postoperative ROM, HSS, and OKS (p<0.05). Radiologically, there was no sign of arthritis on the unoperated side of the knee or failure of prosthesis detected. Before the operation, the average clinical KSS was 63.2 and improved to 91.4 after the operation. In addition, the average functional KSS was 54.9 before the operation and improved to 86.5 after the operation. The average knee flexion degree was 109.1 before the operation and there was an improvement to 123.6 degrees after the operation. Before the operation, the average HSS score was 67.5 (range, 52 to 75) and improved to 89.9 (range, 85 to 100) at the final control examination.ConclusionThis study supports the use of Oxford Phase 3 UKA, which has excellent clinical and radiological results in patients with medial knee arthritis.
Highlights
The incidence of symptomatic knee osteoarthritis is currently increasing all over the world with the aging of the population [1,2,3]
There was no sign of arthritis on the unoperated side of the knee or failure of prosthesis detected
The average knee flexion degree was 109.1 before the operation and there was an improvement to 123.6 degrees after the operation
Summary
The incidence of symptomatic knee osteoarthritis is currently increasing all over the world with the aging of the population [1,2,3]. Limited pain relief and functional improvement can be achieved with the non-operative treatment options [4]. Due to this reason, arthroplasty surgery at the knee is assumed to be popular and by 2030, there will be a linear increase at the rate of 673% [5]. There are some studies showing excellent results after UKA, including a decreased angle of deformity, reduced knee pain, and achieving the physiological knee motion range. These studies have shown that clinical and functional scores
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