Advertisement for orthosearch.org.uk
Orthopaedic Proceedings Logo

Receive monthly Table of Contents alerts from Orthopaedic Proceedings

Comprehensive article alerts can be set up and managed through your account settings

View my account settings

Visit Orthopaedic Proceedings at:

Loading...

Loading...

Full Access

Knee

CEMENTED ATTUNE® FIXED-BEARING MODULAR POSTERIOR-STABILIZED KNEE ARTHROPLASTY HAS AN UNEXPECTEDLY HIGH RATE OF REVISION

The Knee Society (TKS) 2020 Members Meeting, held online, 10–12 September 2020.



Abstract

Background

There are case series of debonding of the ATTUNE® tibial component introduced in 2013. We studied the early clinical results of this total knee arthroplasty (TKA) and compared it to other designs at one hospital.

Methods

This is a retrospective study of 223 consecutive, non-randomized, cemented fixed-bearing posterior-stabilized ATTUNE® TKAs at one hospital by 5 surgeons from 2013 through 2017. We excluded 4 knees with early infection and 53 with follow-up less than 6 months. Of 166 TKAs reviewed, the mean patient age was 63.8 years, mean BMI 32, and mean follow-up 25 months. We compared this to a “control” cohort of 511 TKAs of other manufacturers performed at the same hospital. The endpoints were revision performed and revision pending.

Results

Nineteen (11.5%) ATTUNE® knees have been revised and revision is pending in 12 (7%) knees, at a mean of 30 months. Tibial component loosening was seen in 17 (90%) revised knees. There was no difference between knees revised or revision pending and unrevised knees in patient demographics, cement used (p=0.84), or attending surgeon (p=0.55). In the “control” cohort, there were 13 (2.6%) knees revised (p<0.0001) and revision pending in 8 (1.5%) (p<0.0001), and only 2 had tibial loosening as the reason for revision.

Conclusion

This cemented TKA design had an unexpected high early rate of revision. Debonding of the tibial component was the most common reason for failure. Additional longer-term follow-up studies of this component and techniques for implantation are warranted.