Comparative study of four types of patellofemoral ONLAY prostheses: Is there superiority of one design over another?
Introduction: Patellofemoral osteoarthritis (PFOA) has been associated with anterior knee pain, stiffness, and functional impairment. The incidence of PFOA ranges from 2 % to 24 % in individuals over 55 years old. The development of PFOA has been linked to abnormal stress on the patellofemoral joint...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-08-01
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| Series: | Journal of Orthopaedic Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2773157X25000773 |
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| Summary: | Introduction: Patellofemoral osteoarthritis (PFOA) has been associated with anterior knee pain, stiffness, and functional impairment. The incidence of PFOA ranges from 2 % to 24 % in individuals over 55 years old. The development of PFOA has been linked to abnormal stress on the patellofemoral joint. The treatment of PFOA includes both non-surgical and surgical options. In severe cases that do not respond to conservative management, patellofemoral arthroplasty (PFA) is indicated. PFA has been utilized for approximately 14 years in the studied institution, achieving optimal outcomes in 96.6 % of cases and a conversion rate to total knee arthroplasty of 3.4 % in a cohort of 256 patients. Four different types of prostheses have been used (AVON Stryker, VANGUARD Biomet, JOURNEY Smith & Nephew, and GENDER PF Zimmer–Biomet), prompting this comparative study of different ONLAY-type PFA designs. Materials and methods: A retrospective observational study was conducted involving 256 patients diagnosed with primary Grade IV patellofemoral osteoarthritis. These patients were treated with four different ONLAY PFA designs. The cohort consisted of 77 % females and 23 % males, with a mean age of 52.2 years and a follow-up period of one year. The objective was to evaluate if one design demonstrated superiority over the others. Results: Comparative tables of the different prosthesis models were created, detailing their advantages and disadvantages. These results were contrasted with patient satisfaction indexes measured by the Forgotten Joint Score, and quality-adjusted life years (QALYs) were applied to determine which implant model best suited patients' needs and lifestyles. Conclusions: The results showed high patient satisfaction and improvements in daily and sports activities. The GENDER™ implant was found to be the most recommended based on the combination of the evaluated variables. Level of evidence: IV. |
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| ISSN: | 2773-157X |