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Retrieval Analysis of Cruciate-Retaining and Posterior-Stabilized Total Knee Arthroplasty and Correlations to Laxity and Wear by Meredith R. Perkins; Christina M. Arnholt; Daniel W. MacDonald; Steven M. Kurtz; William M. Mihalko is a Medicine article available to read on EtoBox.

What is Retrieval Analysis of Cruciate-Retaining and Posterior-Stabilized Total Knee Arthroplasty and Correlations to Laxity and Wear about?

## Background: Total knee arthroplasty (tka) with posterior-stabilized (ps) or posterior cruciate-retaining (cr) implants has high success rates and survivorship. however, it is uncertain how laxity and constraint are associated with long-term polyethylene wear under physiological conditions. ## Methods: To answer this question, we measured the laxity patterns of 47 harvested cadaver specimens with primary tkas in a custom knee-testing machine at full extension and at 30°, 60°, and 90° of flexion. the wear patterns of the tibial inserts were assessed using a semiquantitative method which is a modified approach of that proposed by hood et al in 1983. ## Results: Statistical analysis found that the ps tka cohort had a statistically significant increase in varus laxity at 60° and 90° of flexion, as well as total coronal laxity at 60° of flexion when compared to the cr cohort. furthermore, analysis demonstrated a significant correlation between increased ps coronal laxity and increased tibial wear, a trend that was not seen in the cr specimens. ## Conclusion: Our findings suggest that greater laxity in flexion after primary tka may increase the wear realized over time and that ps tkas

Who reads Retrieval Analysis of Cruciate-Retaining and Posterior-Stabilized Total Knee Arthroplasty and Correlations to Laxity and Wear?

Author

Meredith R. Perkins; Christina M. Arnholt; Daniel W. MacDonald; Steven M. Kurtz; William M. Mihalko

Publisher

Elsevier Science; Elsevier ; Churchill Livingstone; Elsevier BV (ISSN 1532-8406)

Published

2020

Language

EN

Field

Medicine (Health Sciences)