OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE

Louis Hainsworth; Ben Lankester

doi:10.1302/1358-992X.2023.13.039

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OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE

The British Association for Surgery of the Knee (BASK) May 2023 Meeting, London, England, 16–17 May 2023.

Louis Hainsworth
Ben Lankester

OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE

Hainsworth L, Lankester B. OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE. Orthop Procs. 2023;105-B(SUPP_13):39-39. doi:10.1302/1358-992X.2023.13.039

Hainsworth, Louis, and Ben Lankester. “OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE.” Orthopaedic Proceedings, vol. 105-B, no. SUPP_13, 2023, pp. 39-39., https://doi.org/10.1302/1358-992X.2023.13.039

Hainsworth, L., & Lankester, B. (2023). OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE. Orthopaedic Proceedings, 105-B(SUPP_13), 39-39. https://doi.org/10.1302/1358-992X.2023.13.039

Hainsworth, L. and Lankester, B. (2023) “OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE.” Orthopaedic Proceedings, 105-B(SUPP_13), pp. 39-39. Available at: https://doi.org/10.1302/1358-992X.2023.13.039

Hainsworth, Louis, and Ben Lankester. “OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE.” Orthopaedic Proceedings 105-B, no. SUPP_13 (2023): 39-39. https://doi.org/10.1302/1358-992X.2023.13.039

Hainsworth L, Lankester B. OUTCOME AFTER AVON PATELLOFEMORAL JOINT REPLACEMENT IN PATIENTS UNDER 55 YEARS OLD: LOW REVISION RATE AT MID-TERM FOLLOW-UP FROM AN INDEPENDENT CENTRE. Orthop Procs. 2023 Aug 7;105-B(SUPP_13):39-39. https://doi.org/10.1302/1358-992X.2023.13.039

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Abstract

Introduction

Isolated patellofemoral osteoarthritis accounts for 10% of knee osteoarthritis. Many of these will not require arthroplasty solutions, but for those who are sufficiently symptomatic, patellofemoral joint (PFJ) replacement has been shown to be an effective procedure. The National Joint Registry (NJR) has shown a higher revision rate for this operation, particularly in younger patients (males <55 years 13.3% failure at 5 years, females 9.6%). The aim of this study is to report on the medium-term outcome of the Avon patellofemoral joint arthroplasty in patients under 55 from a non-design centre. There is no other published case series on this young patient cohort.

Methodology

50 Avon PFJ replacements (Stryker, Kalamazoo USA) were undertaken in 46 patients under 55 years old (range 35 – 54, mean 48.8) between 2010 and 2022 for end-stage isolated PFJ arthritis shown on Xray and MRI scan. The outcome measure was all-cause revision rate. This was assessed by review of clinical notes, imaging and NJR data.

Results

The mean follow up was 5.8 years (range 6 months to 12.9 years). Only one patient had a revision procedure (for progressive osteoarthritis) which was 3 years after the primary procedure. This patient has had no further surgery. The implant survival rate was 97.2% at 5 years and 97.2% at 10 years.

Conclusion

This study shows that patellofemoral joint replacement with the Avon prosthesis can give a satisfactory revision rate in the medium term in patients under 55 if carefully selected.