ArticleArchives of orthopaedic and trauma surgery2026
Platform-specific learning curve and early tibial radiographic agreement of ROSA
Article in Archives of orthopaedic and trauma surgery, 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
purposeTo evaluate the platform-specific learning curve and early tibial radiographic agreement of imageless ROSA
methodsThis retrospective consecutive case series included 30 patients who underwent ROSA
resultsMean robotic time was 14.5 ± 2.4 min, mean non-robotic time was 8.9 ± 3.1 min (range, 4.1-15.6), and mean total surgical duration was 23.4 ± 2.3 min. The continuous LC-CUSUM score crossed the calibrated decision boundary (h = 4.5895) at case 6. Robotic time was 16.0 ± 3.8 min in cases 1-5 and 14.2 ± 2.0 min in cases 6-30 (p = 0.787); corresponding total durations were 24.8 ± 3.8 and 23.1 ± 1.9 min (p = 0.385). Bland-Altman bias for postoperative minus planned measurements was + 0.13° for tibial coronal alignment and + 0.10° for tibial slope; bias for postoperative minus robot-validated HKA was + 0.34°. All 30 postoperative radiographic measurements were within ± 2° of the planned target for both tibial coronal alignment and slope (100%; exact 95% CI, 88.43%-100%).
conclusionsThe predefined platform-specific temporal-performance standard was reached after six cases by an experienced high-volume UKA surgeon. Tibial planned-to-postoperative deviations were small in this consecutive series, while the findings remain conditional on the specified benchmark and require external validation.
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