ArticleJournal of orthopaedic surgery and research2022
A direct referencing method of the tibial plateau for the posterior tibial slope in medial unicompartmental knee arthroplasty.
Article in Journal of orthopaedic surgery and research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 3 citations in OpenAlex.
- Visual inspection provides precise intraoperative evaluation of tibial slope during unicompartmental knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- Radiographic Posterior Tibial Slope Measurement in Medial Unicompartmental Knee Arthroplasty: A Retrospective Validation Study Using Digital Volume Tomography of Tibial Resectates.Journal of clinical medicine · 2026Article
- The 'over-the-top' technique allows for accurate and reproducible restoration of the native tibial slope in kinematically aligned total knee arthroplasty: A retrospective comparative analysis from the FP-UCBM Knee Study Group.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Article
- Referencing the Tibial Plateau With a Probe Improves the Accuracy of the Posterior Slope in Medial Unicompartmental Knee Arthroplasty.Arthroplasty today · 2022Article
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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
purposeThere is no consensus on intraoperative references for the posterior tibial slope (PTS) in medial unicompartmental knee arthroplasty (UKA). An arthroscopic hook probe placed on the medial second quarter of the medial tibial plateau (MTP) in an anteroposterior direction may be used as a direct anatomical reference for the PTS. The purpose of this study is to investigate the availability and accuracy of this method.
methodsMarginal osteophyte formation and subchondral depression of the MTP and angles between the bony MTP and the cartilage MTP were retrospectively evaluated using preoperative sagittal MRI of 73 knees undergoing medial UKA. In another 36 knees, intraoperative lateral knee radiographs with the probe placed on the MTP were prospectively taken in addition to the preoperative MRI. Then, angles between the bony MTP and the probe axis and angles between the preoperative bony MTP and the postoperative implant MTP were measured.
resultsAmong 73 knees, one knee with grade 4 osteoarthritis had a posterior osteophyte higher than the most prominent point of the cartilage MTP. No subchondral depression affected the direct reference of the MTP. The mean angle between the bony MTP and the cartilage MTP was -0.8° ± 0.7° (-2.6°-1.0°, n = 72), excluding one knee with a "high" osteophyte. The mean angle between the bony MTP and the probe axis on the intraoperative radiograph was -0.6° ± 0.4° (-1.7-0.0, n = 36). The mean angle between the pre- and postoperative MTP was -0.5° ± 1.5° (-2.9°-1.8°). The root-mean-square (RMS) error of these two PTS angles was 1.6° with this method.
conclusionCartilage remnants, osteophyte formation and subchondral bone depression do not affect the direct referencing method in almost all knees for which medial UKA is indicated. When the posterior "high" osteophyte of the MTP is noted on preoperative radiography, preoperative MRI or CT scan is recommended to confirm no "high" osteophyte on the medial second quarter. The accuracy of this method seems equal to that of robotic-assisted surgery (the RMS error in previous reports, 1.6°-1.9°).
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