{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T13:52:15Z","timestamp":1791381135718,"version":"4.3.3"},"reference-count":31,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2022,6,14]],"date-time":"2022-06-14T00:00:00Z","timestamp":1655164800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2022,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To determine whether more precise cup positioning can be achieved with robot\u2010assisted total hip arthroplasty (THA) as compared to conventional THA.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this study, between July 2019 and May 2021, 93 patients aged 23\u201375\u2009years with osteonecrosis of the femoral head (ONFH) and adult developmental dysplasia of hip who underwent first hip surgery were included in the study. They were randomly assigned to either the robotic\u2010assisted THA group (n\u00a0=\u00a045) or the conventional THA group (n\u00a0=\u00a048). After the operation, all patients were given routine rapid rehabilitation guidance. The duration of operation was recorded to estimate the learning curve through cumulative summation analysis. We compared the demographics, duration of operation, cup positioning, leg length discrepancy, hip offset, and Harris Hip Score between robot\u2010assisted THA and manual THA. Precision in the positioning of the acetabular prosthesis using the MAKO system was also compared between the two groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean duration of operation for the robot\u2010assisted THA group was 91.37\u2009\u00b1\u200917.34 min (range: 63 to 135 min), which was significantly higher than that for the conventional THA group. When the number of procedures was increased to 13, the duration of operation in the robot\u2010assisted group decreased significantly and gradually became stable. In terms of duration of operation, robot\u2010assisted THA was associated with a learning curve of 13 cases. The mean amount of bleeding in the robot\u2010assisted THA group was not significantly different from that in conventional THA group (328\u2009\u00b1\u2009210 ml <jats:italic>vs<\/jats:italic> 315\u2009\u00b1\u2009205 ml) (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.741). There was no significant difference in the proportion of prostheses located within Lewinnek's safe zone between robot\u2010assisted THA group and conventional THA group (69.81% <jats:italic>vs<\/jats:italic> 64.41%). The leg length discrepancy (LLD) was significantly smaller in the robot\u2010assisted THA group than in the conventional THA group (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), but both were within acceptable limits (10\u2009mm). The inclination and anteversion angles of the acetabular prosthesis planned before operations were correlated with the actual measurement (<jats:italic>r<\/jats:italic>\u00a0=\u00a00.857 <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001, <jats:italic>r<\/jats:italic>\u00a0=\u00a00.830, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). After surgery, none of the patients experienced hip dislocation, aseptic loosening, or periprosthetic infection during the 3\u2009months of follow\u2010up.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The proportion of acetabular prostheses in the Lewinnek's safety zone was higher and the extent of LLD was significantly lower in the robot\u2010assisted THA group, as compared to the same metrics in the conventional THA group. The MAKO robot improved the accuracy of implant placement in THA.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.13334","type":"journal-article","created":{"date-parts":[[2022,6,15]],"date-time":"2022-06-15T05:20:16Z","timestamp":1655270416000},"page":"1498-1505","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":59,"title":["Total Hip Arthroplasty with Robotic Arm Assistance for Precise Cup Positioning: A Case\u2010Control Study"],"prefix":"10.1111","volume":"14","author":[{"given":"Dong\u2010hui","family":"Guo","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery Tianjin Medical University General Hospital  Tianjin China"},{"name":"Department of Orthopaedic Surgery Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine of Hebei Province  Cangzhou 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chao","family":"Qi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine of Hebei Province  Cangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4232-8146","authenticated-orcid":false,"given":"Yuan","family":"Xue","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery Tianjin Medical University General Hospital  Tianjin 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