ArticleBMC musculoskeletal disorders2020
A new method for evaluation of patellar height and the position of the joint line before and after total knee arthroplasty.
Article in BMC musculoskeletal disorders, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 6 citations in OpenAlex.
- Impact of Joint Line Displacement on Function and Quality of Life After Primary Total Knee Arthroplasty.Journal of clinical medicine · 2026Article
- The ROSA knee robotic system demonstrates superior precision in restoring joint line height and posterior condylar offset compared to conventional manual TKA: a retrospective case-control study.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2024Article
- Joint line position change in primary total knee arthroplasty: a radiographic analysis comparing conventional and robotic techniques.International orthopaedics · 2024Article
- Patellar height after unicompartmental knee arthroplasty: comparison between fixed and mobile bearing.Archives of orthopaedic and trauma surgery · 2022Article
- Evaluation of the flexion gap with a distal femoral trial component in posterior-stabilized total knee arthroplasty.Knee surgery & related research · 2022Article
- Evaluation of patella height in native knees and arthroplasty: an instructional review.SICOT-J · 2022Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
backgroundThe measurement of patellar height and restoration of the natural position of the joint line are crucial to total knee arthroplasty (TKA). However, there remains a lack of consensus on an optimal measurement method to associate the patellar height with the joint line position. The objective of this study was to introduce a new method and validate the application in TKA both preoperatively and postoperatively.
methodsInstead of taking marginal landmarks as the tibial references, the tibial shaft axis was used to construct the new measurement method, which comprises the axis-patella (AP), joint axis-patella (jAP) indices and joint line height (JLH). Patellar heights were measured using the Insall-Salvati (IS), modified Insall-Salvati (mIS), Blackburne-Peel (BP), Caton-Deschamps (CD) indices, and the new method in 175 knees both preoperatively and postoperatively. Intraclass correlation coefficients and Pearson's correlation analyses were respectively used to evaluate the reliabilities and correlations.
resultsThere were good correlations between the proposed method and the mIS, CD, and BP indices. High inter-observer reproducibility was found for AP (preoperative and postoperative 0.83), jAP (preoperative 0.82; postoperative 0.86) indices and JLH (preoperative 0.88; postoperative 0.95). High intra-observer repeatability was also found for AP (preoperative 0.85; postoperative 0.87), jAP (preoperative 0.83; postoperative 0.87) indices and JLH (preoperative 0.80; postoperative 0.92).
conclusionsThe new method is reliable for measuring patellar height before and after TKA, providing an alternative to distinguish between true and pseudo patella baja. Furthermore, JLH can be applied to assess and restore the joint line position in TKA.
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