ArticleAnnals of translational medicine2016
Does patellofemoral congruence following total knee arthroplasty correlate with pain or function? Intraoperative arthroscopic assessment of 30 cases.
Article in Annals of translational medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.
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10 citing papers in PubMed, 1 synthesis or guideline pooled it, 12 citations in OpenAlex.
- Implant survival of 3rd-condyle and post-cam posterior-stabilised total knee arthroplasty are comparable at follow-up > 10 years: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022Pooled it
- [Long-term effectiveness of different patellar treatments in primary total knee arthroplasty].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2022Trial
- Comparison of clinical outcomes between cruciate-retaining and posterior-stabilized total knee arthroplasty in patients with mild to moderate patellofemoral joint osteoarthritis.Frontiers in surgery · 2026Article
- The influence of patellar morphology on clinical outcomes after unicompartmental knee arthroplasty.International orthopaedics · 2024Article
- Risk Factors for Atraumatic Medial Patellar Facet Lesions.Orthopaedic journal of sports medicine · 2024Article
- Novel morphogenic knee implant delivers comparable mid-term outcomes as compared to conventional non-morphogenic implants.Archives of orthopaedic and trauma surgery · 2023Article
- The effect of femoral prosthesis design on patellofemoral contact stresses in total knee arthroplasty: a case-control study with mid-term follow-up minimum 3-year follow-up.Journal of orthopaedic surgery and research · 2023Article
- Factors that impact the patellofemoral contact stress in the TKA: a review.Arthroplasty (London, England) · 2023Review
- Patellar facet ratio affects knee pain, stair climbing and stair descent after TKA without patellar resurfacing.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020Article
- The effect of patellar facet angle on patellofemoral alignment and arthritis progression in posterior-stabilized total knee arthroplasty without patellar resurfacing.Knee surgery & related research · 2020Article
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAnterior knee pain (AKP) is observed in total knee arthroplasty (TKA) both with and without patellar resurfacing, and neither patellar denervation nor secondary resurfacing are effective for treating the symptoms. The exact causes for pain remain unclear, though abnormal patellofemoral forces due to patellar malalignment or inadequate implant design can play an important role. The purpose of this study was to arthroscopically evaluate patellofemoral congruence after wound closure following TKA without patellar resurfacing and correlate it to patellar morphology and postoperative pain and function.
methodsThe authors prospectively studied 30 patients that received uncemented mobile-bearing TKA. Patellofemoral congruence was assessed arthroscopically after wound closure by estimating the contact area between the native patella and the prosthetic trochlea (> two-thirds, > one-third, < one-third). The findings were correlated to preoperative assessments of patellar geometry (Wiberg classification using X-rays) and clinical outcomes [Knee Society Score (KSS), AKP on Visual Analogic Scale (VAS), and patient satisfaction].
resultsKnees of 22 women and 8 men aged 69.8 years (range, 61-84 years) were analyzed at 16 months (range, 12-23 months). Preoperative patellar geometry was Wiberg type A in 11, type B in 12 and type C in 7 knees. Postoperative KSS was 79.1 (range, 50.0-94) and the VAS for AKP was 1.6±1.3 (median, 1; range, 0-5). Patellar congruence was correlated with patellar morphology (P<0.001) but not correlated with any clinical outcomes (KSS, VAS or satisfaction). There were also no statistical correlations between patellar morphology or patellofemoral congruence and patient characteristics.
conclusionsWhile patellar morphology and patellofemoral congruence are strongly related, they are not associated with clinical outcomes or patient demographics. Considering that numerous incongruent patellofemoral joints were pain-free, and conversely, many perfectly congruent patellofemoral joints had anterior pain, the authors suppose that pain is probably caused by mechanisms other than patellofemoral pressures.
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