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J Knee Surg. 2019 Feb 1. doi: 10.1055/s-0038-1676770. [Epub ahead of print]

A New Total Knee Arthroplasty Design Has Significantly Better Early Implant Survivorship than a Previous Gold-Standard Design-A Retrospective Analysis of 1,000 Cases.

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1
Nottingham Elective Orthopaedic Services, Nottingham University Hospitals NHS Trust, City Hospital Campus, Nottingham, United Kingdom.

Abstract

This study examined whether a new total knee arthroplasty (TKA) prosthesis improved implant survivorship and reoperation rates compared with a gold-standard, established TKA. A retrospective analysis of the first 500 consecutive new TKAs was compared with a consecutive series of the last 500 currently available TKAs performed by a single senior surgeon in one center. The primary outcome measure was revision of the femoral, tibial, or patellar component. A secondary outcome was reoperation for any reason. The new-TKA group had a significantly reduced revision rate at up to 5 years follow-up (p = 0.02). Reoperation rates for any reason were similar (p = 0.3). The new TKA design has a significantly better early revision rate compared with a currently available gold-standard TKA. This is the largest study of 1,000 cases comparing a new TKA design with a currently available design with excellent midterm results. It demonstrates very favorable early clinical results for the new TKA design, providing reassurance for patients, surgeons, and regulatory bodies.

PMID:
30708383
DOI:
10.1055/s-0038-1676770

Conflict of interest statement

Peter James is a designer of the new TKA and thus receives royalties from DePuy Synthes. He is also a consultant to DePuy Synthes. Nottingham Elective Orthopaedic Services receives fellowship funding and support from DePuy Synthes, ZimmerBiomet, Wright Medical and Exactech.

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