{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T12:11:59Z","timestamp":1783944719555,"version":"3.55.0"},"reference-count":36,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T00:00:00Z","timestamp":1778803200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T00:00:00Z","timestamp":1778803200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Arch Orthop Trauma Surg"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>We developed a novel pinless augmented reality (AR)-based portable navigation system for total hip arthroplasty (THA) in the supine position to eliminate pin-site complications and intraoperative navigation abandonment, and to reduce registration time. This study compared the measurement accuracy of this new pinless portable navigation system with that of a conventional AR-based portable navigation system requiring pin insertion.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and methods<\/jats:title>\n                    <jats:p>This retrospective cohort study compared primary unilateral THAs performed using the novel pinless AR-based navigation system and a conventional AR-based navigation system. The primary outcome was the absolute difference between the acetabular cup angles displayed on the navigation screen and those measured on postoperative computed tomography. Secondary outcomes included target achievement rates within 5\u00b0 and 10\u00b0. Pin-site complications, intraoperative navigation abandonment, and dislocations were also recorded.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      A total of 228 hips were analyzed (Pinless:\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009115; Conventional:\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009113). While there was no significant difference in the median absolute difference for inclination (2.5\u00b0 vs 2.4\u00b0;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.366), the median absolute difference for anteversion was significantly larger in the pinless group than in the conventional group (2.9\u00b0 vs 1.9\u00b0;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.011). There were no significant differences in the percentages within 5\u00b0 (80.0% vs 77.9%;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.747) and 10\u00b0 (99.1% vs 97.3%;\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.367). No pin-site complications, intraoperative navigation abandonment, or dislocations occurred in either group.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Despite a small statistical difference in the absolute anteversion error, the pinless AR-based navigation system demonstrated acceptable measurement accuracy and comparable target achievement rates relative to the conventional system requiring pin insertion in this retrospective cohort. While the new pinless AR-based navigation system eliminates the risk of pin-site complications and intraoperative navigation abandonment, and offers instantaneous registration, further prospective studies are warranted to confirm these findings.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00402-026-06324-1","type":"journal-article","created":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T14:21:52Z","timestamp":1778854912000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A novel pinless augmented reality-based navigation system for total hip arthroplasty in the supine position: a comparative study of acetabular cup angle accuracy"],"prefix":"10.1007","volume":"146","author":[{"given":"Hiroaki","family":"Kurishima","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroyuki","family":"Ogawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norikazu","family":"Yamada","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atsushi","family":"Noro","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasutake","family":"Tomata","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sachiyuki","family":"Tsukada","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,5,15]]},"reference":[{"key":"6324_CR1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.RVW.24.00120","volume":"12","author":"T Miura","year":"2024","unstructured":"Miura T, Yamamoto N, Shiroshita A et al (2024) Comparison of implant placement accuracy between manual, robot-assisted, computer-navigated, augmented reality navigated, patient-specific instrumentation, and accelerometer navigated total hip arthroplasty: a systematic review and network meta-analysis. 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Author HO received a royalty and a speaking fee from Zimmer Biomet Japan, and a speaking fee from Stryker Japan. Author ST received a royalty and a speaking fee from Zimmer Biomet Japan, and a speaking fee from Stryker Japan. Author NY, AN and YT declare they have no financial interests.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}}],"article-number":"185"}}