ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2019
Patella alta and patellar subluxation might lead to early failure with inlay patello-femoral joint arthroplasty.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.
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Who cites it
13 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Patellofemoral arthroplasty with onlay prosthesis leads to higher rates of osteoarthritis progression than inlay design implants: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Pooled it
- Peg Shearing as a Method of Failure in Highly Cross-Linked Polyethylene Patellar Components Used in Patellofemoral Arthroplasty.Arthroplasty today · 2026Article
- Does patellar height influence functional outcomes after reconstruction in distal femur tumours?Journal of clinical orthopaedics and trauma · 2025Article
- Systematic review and meta-analysis of implant-specific outcomes in inlay and onlay patellofemoral arthroplasty for isolated patellofemoral osteoarthritis.Journal of experimental orthopaedics · 2025Review
- [Patellofemoral joint replacement: onlay or inlay?]Orthopadie (Heidelberg, Germany) · 2025Article
- Improved clinical outcomes and a low rate of failure following implantation of a patellofemoral inlay arthroplasty model featuring an enlarged lateral offset - a prospective clinical and radiographic evaluation at short term follow-up.Archives of orthopaedic and trauma surgery · 2025Article
- Does Patellar Height Influence Range of Motion and Anterior Knee Pain after Distal Femur Endoprosthesis Reconstruction?Journal of clinical medicine · 2024Article
- Revision of inlay resurfacing prosthesis with patellar realignment surgery and a new inlay prosthesis for persistent patellofemoral pain und patella subluxation.Archives of orthopaedic and trauma surgery · 2023Article
- PATELLOFEMORAL KNEE PROSTHESIS - WHY IS IT RARELY USED?Acta clinica Croatica · 2023Review
- The lack of retropatellar resurfacing at index surgery is significantly associated with failure in patients following patellofemoral inlay arthroplasty: a multi-center study of more than 260 patients.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022Article
- Contemporary knee arthroplasty: one fits all or time for diversity?Archives of orthopaedic and trauma surgery · 2021Review
- [Patellofemoral inlay implants-an innovation in patellofemoral joint arthroplasty?]Der Orthopade · 2021Review
- Preoperative patellofemoral anatomy affects failure rate after isolated patellofemoral inlay arthroplasty.Archives of orthopaedic and trauma surgery · 2020Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeWith the growing interest in resurfacing procedures, several new implants have been recently introduced for isolated patello-femoral joint arthroplasty (PFA). However, not much data are available for these new techniques or about the right indications for each type of implant.
methodsOut of a retrospective cohort of 20 inlay PFA, 11 PFA with an elevated Insall-Salvati index and an increased patello-femoral congruence angle showed an initial satisfactory result, but presented thereafter with recurrent pain and "clunk" phenomena. They were all revised after a median time of 25 months (range 8-28 months) into an onlay technique PFA and analyzed for their failure mode and revision technique.
resultsClinical symptoms such as clunking, as well as abraded areas craniolateral of the inlay implant found intraoperatively, were the main observations of this study. The modified Insall-Salvati index (mISI) was significantly higher in the revised knees compared to the unrevised (median 1.8 versus 1.6; p = 0.041). VAS and KSS significantly improved after revision (median VAS reduction in pain of 4.0 points, median KSS improvement of 20.0 points; p < 0.05).
conclusionPatients with high-normal patellar height index or patella alta, as well as a craniolateral type of arthritis with additional lateralization, should be considered contra-indicated for an inlay technique PFA. They could be considered for a PFA system reaching further proximal into the distal femur. An onlay PFA can be an option for early revision of failed inlay implants. The clinical relevance of this study is that patella alta and patellar subluxation are more difficult to adjust for with an inlay PFJ component. LEVEL OF EVIDENCE: Level IV.
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