Survival Analysis of the Single- and Double-Coated STAR Ankle up to 20 Years

Abstract

Background:

The Scandinavian Total Ankle Replacement (STAR) has been used widely in Europe and more recently in the United States. We studied the results of the single-coated and the double-coated STAR with long-term follow-up.

Methods:

All STARs (n = 324) used in Sweden (first implanted in 1993) were included. Prosthetic survival was estimated according to Kaplan-Meier.

Results:

The 14-year survival of the single-coated STAR was 0.47 (95% confidence interval [CI], 0.38-0.66), and the 12-year survival of the double-coated STAR was 0.64 (95% CI, 0.57-0.71). Women younger than 60 years with osteoarthritis had a statistically significantly higher risk of revision than men and than patients with other diagnoses.

Conclusion:

The long-term results of the STAR prosthesis are not encouraging. The results seem to deteriorate by time.

Level of Evidence:

Level IV, retrospective case series.