Long-term Results of Scandinavian Total Ankle Replacement

• Published in: Foot & ankle international Vol. 38; no. 7; pp. 723 - 731
• Main Authors: Koivu, Helka, Kohonen, Ia, Mattila, Kimmo, Loyttyniemi, Eliisa, Tiusanen, Hannu
• Format: Journal Article
• Language: English
• Published: Los Angeles, CA SAGE Publications 01-07-2017
• Subjects: Ankle Joint - diagnostic imaging; Ankle Joint - physiology; Ankle Joint - surgery; Arthroplasty, Replacement, Ankle - methods; Humans; Joint Prosthesis - standards; Osteoarthritis - physiopathology; Patient Satisfaction; Prosthesis Design - methods; Range of Motion, Articular; Retrospective Studies; STAR; total ankle arthroplasty; survival
• ISSN: 1071-1007; 1944-7876
• DOI: 10.1177/1071100717698695

Background:
The purpose of this study was to evaluate the long-term results of the Scandinavian Total Ankle Replacement (STAR) implant in a single center.
Methods:
Between 1997 and 2002, 34 consecutive ankles were replaced with the STAR ankle prosthesis and reviewed in 2016. Patients were followed both radiologically and clinically; clinical outcomes were measured with the Kofoed ankle score and subjective measurements. The median follow-up period was 159 months (13.3 years; range, 13-202 months).
Results:
The implant survival rate was 93.9% (95% confidence interval [CI], 92.2%-86.7%) at 5 years, 86.7% (95% CI, 69.3%-96.2%) at 10 years, and 63.6% (95% CI, 30.8%-89.0%) at 15 years. A total of 15 ankles (44%) had been revised: 2 by fusion, 3 by further replacement, 5 by insert exchange, and 5 by bone grafting for marked osteolysis. The improvements in the Kofoed ankle score and Kofoed ankle score for pain were statistically significant at every postoperative evaluation point compared to the preoperative values (all P < .0001), and subjective patient satisfaction was high.
Conclusion:
Our results were satisfactory and in agreement with previously reported findings of STAR implants.
Level of Evidence:
Level IV, retrospective case series.