The Journal of Arthroplasty , Volume 33 , Issue 7 , S186 - S190

High Rate of Failure After Revision of a Constrained Liner

Hellman, Michael D. et al.
Hip

Background

The purpose of this study was to examine the outcomes of repeat revision after failure of a constrained liner.

Methods

We reviewed 1212 consecutive revisions and identified 74 (6%) revisions of a failed constrained liner in 46 patients with a mean age of 65 years. The most common reasons for revision of a constrained liner were recurrent instability (64.9%) and infection (25.7%).

Results

At a mean of 35 months, 42 of the 74 hips (57%) required repeat revision. Kaplan-Meier revision-free survival was 24% at 10 years. Thirty-two of the 74 revisions (43%) had a dislocation event after the index revision. Kaplan-Meier dislocation-free survival was 43% at 10 years. There was a higher failure rate among the 34 patients with abductor deficiency (hazard ratio 1.90, 95% confidence interval, 1.06-3.43; P = .032).

Conclusion

Patients undergoing revision of a failed constrained liner have a high likelihood of recurrent dislocation and repeat revision surgery.

Level of Evidence

Level IV.


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