Simplifying patello-femoral arthroplasty (PFA)
The Gender Solutions PFJ System is designed to address the anatomical differences among men and women with a reproducible instrumentation platform, aiming to simplify patello-femoral arthroplasty (PFA).
Compared to TKA
- PFA is associated with shorter postoperative rehabilitation6
- PFA is associated with better knee kinematics in the sagittal plane due to the preservation of the tibiofemoral articulation, menisci, ACL and other supporting ligaments6
- PFA patients showed better functionality, less blood loss and greater return to activity7
Gender Solutions PFJ Clinical Results
Patients Needed No Further Surgery96%
At an average of 4.9 years, excluding traumatic injuries and MUA1
Good to Excellent Results84%
In a multi-centre study of 79 knees2
Functioning Without Pain in Daily Activities90%
In a multi-centre study of 79 knees2
Modified, Thinner Anterior Flange
A thinner anterior flange helps avoid overstuffing and is designed to address the female population’s unique need for shorter medial and lateral condyle heights compared to men.3
Increased Trochlear Groove Angle
“This enhanced tracking angle has proven particularly useful in female patients, who account for approximately two thirds of PFA recipients and who often have an increased Q-angle, dysplasia and patellar subluxation preoperatively…”4
Proprietary Guided Milling System
A simple instrument, eliminating challenges and errors presented in freehand techniques.5 By referencing native cartilage to determine varus/ valgus placement, the intercondylar region of the implant is flush with surrounding cartilage to help avoid impingement of the patellar component.
The PFJ Prosthesis is compatible with Gender Solutions Natural-Knee® Flex, and NexGen® Standard All-Polyethylene, Porous, or Augmentation Patella.
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Gender Solutions Patello-Femoral Joint System Surgical Video
Gender Solutions Patello-Femoral Joint Milling Handpiece Cleaning and Sterilization Procedures
* The M/G trademark is owned by Smith & Nephew
- Foran, JR. et al. Long-term Survivorship and Failure Modes of Unicompartmental Knee Arthroplasty. Clin Orthop Relat Res. 2013 Jan; 471(1): 102–108.
- Berger, RA. et al. Results of unicompartmental knee arthroplasty at a minimum of ten years of follow-up. J Bone Joint Surg Am. 2005 May;87(5):999-1006.
- Persona® Partial Knee Clinical Outcomes Study ANNUAL REPORT K.CR.I.G.16.16. Internal data on file at Zimmer Biomet. Sept 2019.
- Zimmer ZRR_WA_2409_11. Extended Aging of Vitamin E Highly Crosslinked Polyethylene.
- Zimmer ZRR_WA_2537_12. Wear Testing of Persona PS Vivacit-E Uhmwpe Articular Surfaces Under Load And Motion Curves from the Iso-14243 Standard.
- Zimmer TM1140.98. 7. Evaluation of the Mechanical Properties Crosslinked UHMWPE.
- Zimmer ZRR_WA_2403_11. Vitamin E Stabilized Highly Crosslinked Polyethylene-Extractability Study.
- Zimmer ZRR_WA_2551_12. Spine Fatigue Evaluation of the NexGen Lps-Flex Conventional Net Shape Molded Articular Surfaces.
- Bischoff JE, Argenson J-N, Della Valle CJ, Thienpont E. Morphologic Assessment of Tibial Tray Design in Partial Knee Arthroplasty. ORS [submitted]. New Orleans, LA 2018.
- Liddle et al. Optimal usage of unicompartmental knee arthroplasty A STUDY OF 41 986 CASES FROM THE NATIONAL JOINT REGISTRY FOR ENGLAND AND WALES. Bone Joint J 2015;97-B:1506–11.
- Pritchett, JW. Patients Prefer a Bicruciate-Retaining or the Medial Pivot Total Knee Prosthesis. Journal of Arthoplasty. Vol. 26 No. 2 2011.
- Katayama, M. et al. Proprioception and Performance After Anterior Cruciate Ligament Rupture. International Orthopaedics (SICOT)
- Amin A, et al. Unicompartmental or Total Knee Replacement? A Direct Comparative Study of Survivorship and Clinical Outcome at Five Years. JBJS Br. 2006; 88-B; Suppl 1, 100.
- Jones, GG, et al. Gait comparison of unicompartmental and total knee arthroplasties with healthy controls. Bone Joint J 2016;(10 SupplB):16–21.
- Willis-Owen CA, et al. Unicondylar knee arthroplasty in the UK National Health Service: An analysis of candidacy, outcome and cost efficacy. Knee. 2009 Dec;16(6):473–8.
- Lombardi, A. et al. Is Recovery Faster for Mobile-bearing Unicompartmental than Total Knee Arthroplasty? Clinical Orthopedics and Related Research. 467:1450-57. 2009.
- Brown, NM, et al. Total Knee Arthroplasty Has Higher Postoperative Morbidity Than Unicompartmental Knee Arthroplasty: A Multicenter Analysis. The Journal of Arthroplasty. (2012).