ArticleArthroplasty today2026
Validation of the Accuracy of Robotic Arm-Assisted Total Hip Arthroplasty After Rotational Acetabular Osteotomy: A Propensity-Matched Controlled Study.
Article in Arthroplasty today, 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
8 authors.
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Abstract
Background: Robot-assisted total hip arthroplasty (THA) improves the accuracy of implant placement. However, acetabular cup positioning in patients with a history of pelvic osteotomy remains technically demanding, and the benefit of robotic assistance in such cases has not been established. This study aimed to evaluate the accuracy of acetabular cup placement using robot-assisted THA in patients who previously underwent rotational acetabular osteotomy (RAO), a type of pelvic osteotomy performed for hip dysplasia. Methods: We retrospectively reviewed 23 patients (25 hips) who underwent robot-assisted THA after RAO between January 2021 and February 2023 (RAO group). A control group of 100 patients who underwent unilateral robot-assisted THA for mild hip dysplasia (Crowe type I) between January 2022 and December 2022 was established. One-to-one propensity score matching was performed based on age, sex, and body mass index. The errors and absolute values of radiographic inclination, radiographic anteversion, and the mediolateral, anteroposterior, and superoinferior axes were measured using three-dimensional planning software. Results: No significant differences were observed between the RAO and control groups in the errors of radiographic inclination, radiographic anteversion, mediolateral, anteroposterior, or superoinferior axes ( Conclusions: Robot-assisted THA enabled acetabular cup placement in patients with prior RAO, with no significant differences in implantation errors compared with primary THA for mild hip dysplasia. These findings suggest that previous RAO does not adversely affect the accuracy of robot-assisted THA.
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