Minimally invasive Oxford unicompartmental knee arthroplasty ensures excellent functional outcome and high survivorship in the long term

Abstract

Purpose Whether unicompartimental or total knee arthroplasty is superior for treatment of anteromedial knee osteoarthritis, is still uncertain. Therefore, the purpose of this study was to evaluate clinical and radiological outcome as well as long-term survivorship of medial Oxford unicompartmental knee arthroplasty (OUKA) at an independent center with a minimum follow-up of 10 years. Methods This single-center retrospective cohort study reports the 10-15 years follow-up results of 113 consecutive patients (126 knees) after medial OUKA. Survivorship analysis was performed with several diferent endpoints and clinical outcome was measured using the Oxford Knee Score (OKS), American Knee Society Score (AKSS-O), range of motion (ROM), Tegner activity score and UCLA score. Radiological analysis was performed with focus on progression of arthritis in the lateral compartment. Results A total of 16 patients (16 knees) underwent revision surgery resulting in a survival rate of 92.4% at 10 years and 88.6% at 15 years with the endpoint device-related revisions. The main reason for revision surgery was progression of arthritis in ive patients (31.3%) followed by persistency of pain in three patients (18.7%). Clinical outcome was good to excellent with an OKS of 39.9 at 11 years, an AKSS-O of 89.3 and a mean range of motion of 122°. The radiological analysis revealed a signiicant progression of degenerative changes in the lateral compartment, however without any impact on the functional outcome. Conclusion Oxford UKA of the medial compartment ensures good long-term survivorship with an excellent functional outcome. Therefore, the results of this study support the continued use of OUKA in patients with anteromedial osteoarthritis. Level of evidence Retrospective cohort study, Level III.

Internal fixation and unicompartmental knee arthroplasty for an elderly patient with patellar fracture and anteromedial osteoarthritis: A case report

“…In addition, patients regain better ROM, return to activities quicker, have shorter hospital stays, gain superior function, and have a more natural feel of the knee after UKA[ 12 ]. The Oxford UKA is a type of mobile-bearing UKA and common for treating anteromedial OA of the knee[ 7 ].…”

“…It includes fixed-bearing UKA and mobile-bearing UKA. The Oxford UKA is a type of mobile-bearing UKA and a successful treatment for end-stage, symptomatic anteromedial OA of the knee[ 7 ].…”

Does patellofemoral osteoarthritis affect functional outcomes and survivorship after medial unicompartmental knee arthroplasty? A meta-analysis

“…UKA can effectively relieve pain and improve function by surface replacement of the affected compartment and has the advantages of minimal trauma and a quick recovery. The long-term and medium-term functional results are satisfactory [1][2][3]. However, the contraindications of UKA are still controversial.…”

Anthropometry of the medial femoral condyle in the Chinese population: the morphometric analysis to design unicomparmental knee component

“…UKA can effectively relieve pain and improve function by surface replacement in the lesion compartment. It has the advantages of minimal trauma and rapid recovery, and the longterm and medium-term curative effects are satisfactory [1][2][3]. However, most UKA components currently used in China are designed for the physique of Western individuals, and many studies have shown that components designed for Western patients are not matched for other populations [4][5][6].…”