Outcomes of patellofemoral joint arthroplasty: a systematic review of revision timelines and complication rates.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: Declarations. Ethics approval and consent to participate: A predefined protocol was registered on Prospero and adhered to using PRISMA guidelines. No ethical approval is required for systematic review. Consent for publication: MV-B drafted the initial manuscript, and all authors (DC, JK, CC, AC, AFF, JR, and AL) were involved in revising the manuscript and gave final approval for the publication of the version. All authors had access to all data in the study and took responsibility for the integrity of the data and the accuracy of the data analysis. Competing interests: No, I declare that the authors have no competing interests as defined by BMC or other interests that might be perceived to influence the results and/or discussion reported in this paper. 16. Int Orthop. 2025 Dec;49(12):2811-2818. doi: 10.1007/s00264-025-06663-5. Epub 2025 Sep 29. Patellofemoral arthroplasty and chondrocalcinosis: a twenty year follow-up. Hernigou P(1), Caton J(2). Author information: (1)Paris-Est Créteil University, Créteil, France. philippe.hernigou@wanadoo.fr. (2)Paris-Est Créteil University, Créteil, France. PURPOSE: Calcium pyrophosphate dihydrate (CPPD) deposition, often visible radiographically as chondrocalcinosis, frequently accompanies knee osteoarthritis and is usually encountered at the time of arthroplasty. Whether its presence influences the outcome of patellofemoral arthroplasty (PFA) remains uncertain. METHODS: We reviewed 100 PFAs performed in 82 patients between 1997 and 2005, and followed them for an average of 22 years (range, 20-25 years). At surgery, 35 knees showed radiographic chondrocalcinosis, and an additional 33 developed calcification during follow-up. RESULTS: Fifteen knees (15%) required revision to total knee arthroplasty (TKA) at a mean of 12 years after PFA. The main reasons for revision were tibiofemoral osteoarthritis progression (6 knees), patellar malalignment (7 knees), one implant loosening, and one patella fracture. The 20-year survival rates were 87% for knees without chondrocalcinosis and 90% for those with chondrocalcinosis, with no significant difference in revision timing between groups (log-rank p = 0.64). CONCLUSION: Although chondrocalcinosis became more prevalent with age and follow-up, it did not increase the risk of conversion to TKA. These findings suggest that PFA remains a suitable option in carefully selected patients, regardless of the presence of chondrocalcinosis. © 2025. The Author(s) under exclusive licence to SICOT aisbl. DOI: 10.1007/s00264-025-06663-5