Eight to Ten Year Follow-Up Results of Total Knee Arthroplasty Using Electromagnetic Navigation System.
10.4055/jkoa.2018.53.3.226
- Author:
Jae Young CHO
1
;
Seung Hyeon JEUNG
;
Sung Min HONG
;
Jeung Tak SUH
;
Yoon Young CHOI
;
Seung Joon RHEE
Author Information
1. Department of Orthopedic Surgery, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea. rheefury@naver.com
- Publication Type:Original Article
- Keywords:
total knee arthroplasty;
navigation;
long-term
- MeSH:
Arthroplasty;
Arthroplasty, Replacement, Knee*;
Cross-Sectional Studies;
Follow-Up Studies*;
Humans;
Knee;
Magnets*;
Methods;
Ontario;
Osteoarthritis;
Postoperative Period;
Range of Motion, Articular;
Retrospective Studies
- From:The Journal of the Korean Orthopaedic Association
2018;53(3):226-233
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: The purpose of this study was to compare the clinical and radiological results between patients who underwent total knee arthroplasty using the conventional method and the navigation-assisted method. MATERIALS AND METHODS: A retrospective review of was performed on 32 patients (40 knees) who underwent total knee arthroplasty between February 2004 and December 2006 and were followed-up for 8 to 10 years. Mechanical axis deviation, range of motion, radiologic position of the implants, and subjective clinical scores were measured and compared between 20 navigation-assisted total knee arthroplasties and 20 conventional total knee arthoplasties. Change in the values (α, β, γ, and δ angles) from the immediate postoperative period to the last follow-up were also calculated and compared between the two groups. RESULTS: The mean range of motion in the navigation group was improved to 121.8°±16.3° (92°–140°) at the last follow-up, and the Western Ontario McMaster Universities osteoarthritis Index (WOMAC) score was 89.8±5.4 and the Knee Society score (KSS) was 91.5±7.5. The mean range of motion in the conventional group was 112.6°±25.6° (60°–140°) at the last follow-up. The WOMAC score was 84.2±10.6, and the KSS was 81.1±14.3. The α, β, γ, and δ angles of the implants were not significantly changed until the last follow-up. In the comparison between the two groups, only the mean range of motion (p=0.018) and the KSS (p=0.038) showed statistically better results in the navigation group than the conventional group. CONCLUSION: Navigation-assisted total knee arthroplasty showed better KSS and range of motion compared with the conventional group in a cross-sectional study with 8 to 10 years of follow-up results. However, only the KSS showed a significant difference between the two groups by the amount of changes in the clinical and radiological results.
