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Clinical Orthopaedics and Related Research®

Published in:

01-01-2014 | Symposium: 2013 Knee Society Proceedings

Comparison of Total Knee Arthroplasty With Highly Congruent Anterior-stabilized Bearings versus a Cruciate-retaining Design

Authors: Christopher L. Peters, MD, Patrick Mulkey, MD, Jill Erickson, PA-C, Michael B. Anderson, MS, ATC, Christopher E. Pelt, MD

Published in: Clinical Orthopaedics and Related Research® | Issue 1/2014

Abstract

Background

The use of a highly conforming, anterior-stabilized bearing has been associated with clinical success in a limited number of studies.

Questions/purposes

We compared Knee Society scores, radiographic results, complication rates, and revision rates with the use of anterior-stabilized bearings compared with cruciate-retaining (CR) bearings.

Methods

A series of 382 patients with 468 primary total knee arthroplasties (TKAs) between 2003 and 2008 with minimum 2-year followup were reviewed. Anterior-stabilized bearings comprised 49% (n = 228) of the sample and CR bearings consisted of 51% (n = 240). The decision to use an anterior-stabilized bearing was based on integrity of the posterior cruciate ligament (PCL) intraoperatively or after sacrifice of the PCL to achieve soft tissue balance. The tibial and femoral component designs were the same regardless of bearing choice. Outcomes were measured with Knee Society scores, complications, revision TKA, and survival. Radiographs were analyzed for component alignment and evidence of loosening.

Results

There was no difference in Knee Society knee scores, radiographic alignment, component loosening, manipulation rate, major complications, or time to revision for patients between the two groups. However, the CR group had significantly more revisions than the anterior-stabilized group (21 CR [1.5%] versus seven anterior-stabilized [4.6%], p = 0.03) at a minimum followup of 5 months (mean, 42 months; range, 5–181 months).

Conclusions

The use of a highly congruent anterior-stabilized bearing for PCL substitution has comparable clinical and radiographic results to traditional CR TKA. These results suggest that this approach is an effective method to achieve stability without the PCL in primary TKA.

Level of Evidence

Level III, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.

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Title: Comparison of Total Knee Arthroplasty With Highly Congruent Anterior-stabilized Bearings versus a Cruciate-retaining Design
Authors: Christopher L. Peters, MD
Patrick Mulkey, MD
Jill Erickson, PA-C
Michael B. Anderson, MS, ATC
Christopher E. Pelt, MD
Publication date: 01-01-2014
Publisher: Springer US
Published in: Clinical Orthopaedics and Related Research® / Issue 1/2014
Print ISSN: 0009-921X
Electronic ISSN: 1528-1132
DOI: https://doi.org/10.1007/s11999-013-3068-6

At a glance: The STEP trials

Springer Medicine

Comparison of Total Knee Arthroplasty With Highly Congruent Anterior-stabilized Bearings versus a Cruciate-retaining Design

Abstract

Background

Questions/purposes

Methods

Results

Conclusions

Level of Evidence

At a glance: The STEP trials

Springer Medicine

Abstract

Background

Questions/purposes

Methods

Results

Conclusions

Level of Evidence

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