Unicondylar Knee Arthroplasty versus Total Knee Arthroplasty in early medial compartment arthritis patients

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Unicondylar Knee Arthroplasty versus Total Knee Arthroplasty in early medial compartment arthritis patients

In unicompartmental knee arthroplasty, the damaged parts of the knee are replaced via a surgical procedure to alleviate arthritis in one of the knee compartments. There has been a rise in patient dissatisfaction with surgical outcomes due to the increasing number of patients with early osteoarthritis of knee opting for total knee arthroplasty (TKA). It is believed that offering unicondylar knee arthroplasty (UKA) to these patients can help ameliorate the outcomes.

Kulshrestha V, et. Al., conducted a study to seek out the difference in patient-reported outcomes and function at 2 year follow-up in patients undergoing UKA vs TKA. It was a randomized study with parallel assignment conducted at a high-volume specialized arthroplasty center. A total of 80 patients with bilateral isolated medial compartment knee arthritis were randomized into simultaneous 2 groups, bilateral TKA (n = 40) and UKA (n = 40). Finally, 36 patients in each group were studied.  The primary outcome was augmentation in Knee Outcome Survey-Activities of Daily Living Scale (KOS-ADLS) and High Activity Arthroplasty Score (HAAS) obtained at 2 year follow-up.

It was found that improvement in KOS-ADLS and HAAS at 2 years was comparable (P=0.2143 and 0.2010) in both groups. Performance as estimated with Delaware index was also similar. The length of hospital stay was less in UKA group (6.6 days TKA vs. 5.4 days UKA). In the TKA group, complications and readmission rates were more (nil in UKA group; 08 in TKA group).

It was concluded that at  2 year follow-up, UKA provides similar improvement in patient-reported outcomes, function, and performance as compared to TKA when executed in patients with early arthritis. Although  UKA patients had shorter hospital stay and experienced fewer complications.


Journal of Arthroplasty

Link to the source:


Original title of article:

Outcome of Unicondylar Knee Arthroplasty vs Total Knee Arthroplasty for Early Medial Compartment Arthritis: A Randomized Study


Vikas Kulshrestha et al.

Exploratory, Total knee arthroplasty (TKA), Unicondylar knee arthroplasty (UKA), Arthritis, Joints, Randomized study, Efficacy, Knee Outcome Survey-Activities of Daily Living Scale (KOS-ADLS), High Activity Arthroplasty Score (HAAS)
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