ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2026
Visual inspection provides precise intraoperative evaluation of tibial slope during unicompartmental knee arthroplasty.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeAccurate reconstruction of the posterior tibial slope (PTS) is essential for successful unicompartmental knee arthroplasty (UKA), yet intraoperative assessment remains challenging without advanced navigation tools. This study evaluated the accuracy of visual intraoperative assessment of PTS changes after tibial resection.
methodsResection blocks from total knee arthroplasty (TKA) were processed to simulate UKA resections, providing a wide range of slope variations. PTS changes were measured radiographically and via optical scans of resection blocks from 55 patients with severe osteoarthritis. Three experienced surgeons visually estimated PTS changes, which were compared to reference measurements using intraclass correlation coefficients (ICCs), Pearson correlation, analysis of variance (ANOVA) and Tukey's honestly significant difference (HSD) tests.
resultsOptical scan and radiographic measurements showed near-perfect agreement (ICC = 0.99). The mean deviation between surgeon estimates and radiographic measurements was 1.0° ± 0.7° (range 0°-3.0°). Examiner ICCs ranged from 0.88 to 0.96, and Pearson correlations were strong (0.77-0.87). ANOVA and HSD tests showed no significant differences between visual and reference measurements.
conclusionVisual inspection by experienced surgeons provides a sufficiently accurate and reliable method for intraoperative assessment of PTS during UKA. LEVEL OF EVIDENCE: Level IV.
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