A Five-Year Comparative Functional and Clinical Evaluation of Two Contemporary Cruciate-Retaining Knee Implants

Overview

Journal Arthroplast Today

Publisher Elsevier

Date 2020 Jun 25

PMID 32577480

Citations 4

Authors

Ashok Rajgopal

Kalpana Aggarwal

Sumit Kumar

Affiliations

Soon will be listed here.

Abstract

Background: The purpose of our study was to compare 2 commonly used highly successful cruciate-retaining knee designs on the basis of patient-reported outcome measures (PROMs), range of motion (ROM), and anterior knee pain (AKP) at a minimum follow-up of 5 years.

Methods: A cohort of 65 patients underwent unilateral total knee arthroplasty, from January 2013 to December 2013, using NexGen Cruciate Retaining (Zimmer Biomet, Warsaw, IN), a nonmorphogenic knee (NMK) system. They were subsequently operated upon for the contralateral knee using Persona Cruciate Retaining (Zimmer Biomet, Warsaw, IN), a morphogenic knee (MK) system between January 2014 and June 2014. Of the 65 patients, 63 participated in this study. All the patients were compared preoperatively and postoperatively on the basis of PROMs, ROM, and AKP.

Results: On the basis of PROMs, ROM, and AKP, there was a statistically significant difference between the 2 groups favoring the MK group, with an ROM of 126.14° in the MK group as compared with 120.76° in the NMK group and value of <.01.

Conclusions: PROMs, ROM, and AKP improved significantly over time after total knee arthroplasty using both MK and NMK implants; however, the outcomes of the former were better than those of the latter, although this difference was not clinically significant.

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