Knee Surg Relat Res.  2017 Jun;29(2):122-128. 10.5792/ksrr.16.045.

Mid-Term Results of Oxford Medial Unicompartmental Knee Arthroplasty in Young Asian Patients Less than 60 Years of Age: A Minimum 5-Year Follow-up

• Kim YJ
• Kim BH
• Yoo SH
• Kang SW
• Kwack CH
• Song MH

• KMID: 2379436
• DOI: http://doi.org/10.5792/ksrr.16.045

Abstract

PURPOSE
The purpose of this study was to evaluate the efficacy of unicompartmental knee arthroplasty (UKA) in young active Asian patients by analyzing clinical outcomes, complications and survival rates.
MATERIALS AND METHODS
Eighty-two knees were evaluated with a minimum follow-up of 5 years after Oxford phase 3 UKA in patients less than 60 years of age at the time of surgery. Their mean age was 54.7 years (range, 44 to 59 years). The mean follow-up period was 8.9 years (range, 5.3 to 12 years). Kaplan-Meier survivorship analysis was used to estimate implant survival.
RESULTS
Including 3 bearing dislocations, 1 medial tibial collapse and 1 lateral osteoarthritis, the total complication rate was 6.1% (5/82). Of the 3 cases of bearing dislocation, 2 cases were resolved by replacing with a thicker bearing and 1 case was converted to total knee arthroplasty (TKA) due to repeated dislocation. The two knees with a medial tibial collapse and a lateral osteoarthritis were converted to TKA. The 10-year cumulative survival rate using Kaplan-Meier survival method was 94.7% (95% confidence interval: 88.7%-100%).
CONCLUSIONS
Oxford medial UKA was reliable and effective in young active Asian patients providing good clinical results and survival rate in the mid-term follow-up.

Keyword

Knee; Osteoarthritis; Arthroplasty; Unicompartmental; Mobile bearing; Asian; Young age

MeSH Terms

Arthroplasty
Arthroplasty, Replacement, Knee*
Asian Continental Ancestry Group*
Dislocations
Follow-Up Studies*
Humans
Knee
Methods
Osteoarthritis
Survival Rate