Patellofemoral Joint Arthroplasty: Early Results and Functional Outcome of the Zimmer Gender Solutions Patello-Femoral Joint System

Abstract

BackgroundImproved knee prosthesis designs have led to an increase in the use of patellofemoral arthroplasty as a primary treatment option in recent times. We report the early results and outcomes of the Zimmer Gender Solutions Patello-Femoral Joint (PFJ) system used to treat isolated patellofemoral osteoarthritis (PFA).MethodsWe retrospectively reviewed and analysed data of patients who underwent PFJ replacement (PFJR) at our institution with a minimum follow-up of 2 years.ResultsMedian Oxford Knee score (OKS) was 38 (interquartile range, 28 to 42) at the latest follow-up with a significant improvement from preoperative scores (p < 0.0005). Median OKS was 40 for unilateral PFJRs and 39 for nonobese patients (body mass index [BMI] < 30 kg/m2). There was no significant difference in OKS between unilateral and bilateral procedures (p = 0.462). Likewise, there was no significant difference in OKS between obese and nonobese patients (p = 0.272). Two knees (4%) were revised for progression of osteoarthritis. No complications were reported related to infectious or thromboembolic causes.ConclusionsOur study showed good early results of the PFJ system, at least equal to those of other leading brands in the National Joint Registry for England, Wales and Northern Ireland (NJR). There have been no complications related to either the implantation technique or prosthetic design for this new implant. Progression of tibiofemoral arthritis remains a major concern. Our study also suggests that PFJR in obese patients and bilateral procedures can have good results.

Failure modes of patellofemoral arthroplasty—registries vs. clinical studies: a systematic review

“…2016, Konan and Haddad 2016, Osarumwense et al. 2017, Odgaard et al. 2018), suggesting that PFA may be a good choice in suitably selected patients.…”

Good clinical outcomes of patellofemoral arthroplasty for isolated patellofemoral osteoarthritis: a case-matched cohort comparative study of PFA with TKA

“…Although PFA has existed for 30 years, it is still controversial because of the high failure rate in the early design of trochlear prosthesis [22]. The improved second generation of PFA, such as Zimmer PFA [12], which achieved better clinical results and higher prosthesis survival. We found that the new implant jigs developed for this prosthesis was easy to use, accurate and reproducible.…”

“…With the development of more and more anatomical PFA prosthesis designs, it can achieve better clinical results, higher patients satisfaction and prosthesis survival rate [11]. In the past four years, the second generation Zimmer gender PFA has been the most widely used patellofemoral prosthesis in Australia, with a 3-year cumulative revision rate of 5.3% [12]. As obesity and exercise-related injuries are expected to increase, more and more patients will need knee arthroplasty.…”

Patellofemoral Arthroplasty Improves Patellofemoral Alignment in Patients with Patellofemoral Osteoarthritis with Trochlear Dysplasia

“…The same surgical team performed all of the surgeries in accordance with standard surgical protocols. 25 An arthroscopic examination conducted before PFA to confirm that the presence of degenerative cartilage was limited to the patellofemoral joint. 16 PFA was performed through a standard medial parapatellar approach.…”