The Influence of Postoperative Tibiofemoral Alignment on the Clinical Results of Unicompartmental Knee Arthroplasty
- Author:
Kyung Tae KIM
1
;
Song LEE
;
Tae Woo KIM
;
Jung Soo LEE
;
Kyung Hwan BOO
Author Information
1. Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea. pasha96@naver.com
- Publication Type:Original Article
- Keywords:
Knee joint;
Unicompartmental arthroplasty;
Tibiofemoral angle
- MeSH:
Arthroplasty;
Follow-Up Studies;
Humans;
Knee;
Knee Joint;
Survival Rate
- From:The Journal of Korean Knee Society
2012;24(2):85-90
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: To evaluate the influence of postoperative tibiofemoral alignment on the clinical results and failure in patients who underwent unicompartmental knee athroplasty (UKA). MATERIALS AND METHODS: We reviewed 246 cases of medial UKA which were followed up for at least 5 years after the operation. The clinical results were compared between 5 groups classified according to the tibiofemoral angle that was measured at 3 months after surgery. We analyzed the relationship between the tibiofemoral alignment and the failure after UKA. RESULTS: The preoperative tibiofemoral angle was changed from 0.4degrees of varus to 5.4degrees of valgus after surgery and the average correction angle was 5.8degrees. During the follow-up, which averaged 7 years and 5 months, the knee score and function score were improved significantly in all groups regardless of the tibiofemoral angle (p<0.01). There were no significant difference between the groups in the clinical results (p>0.05). However, there were significant differences in the cumulative survival rate of implants between the groups and the highest rate was found in the group with a tibiofemoral angle of 4degrees to 6degrees of valgus (p<0.01). CONCLUSIONS: The tibiofemoral angle after UKA had no significant influence on the midterm clinical scores, but there was a significant relationship between the postoperative tibiofemoral angle and failure rate of implant.
