{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T09:58:58Z","timestamp":1789466338465,"version":"build-2803163510"},"reference-count":30,"publisher":"Public Library of Science (PLoS)","issue":"5","license":[{"start":{"date-parts":[[2023,5,3]],"date-time":"2023-05-03T00:00:00Z","timestamp":1683072000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"University of Szeged Open Access Fund","award":["5780"],"award-info":[{"award-number":["5780"]}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n<jats:title>Objectives<\/jats:title>\n<jats:p>Recording and reproducing mandibular movements have been of key importance in the practice of dentistry for over a century. Recently, it has become possible to use digital technologies for these tasks. This study presents a preliminary method to try to identify the mandibular instantaneous centres of rotation based solely on intraoral scanners.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec002\">\n<jats:title>Methods<\/jats:title>\n<jats:p>The dentitions of four participants were scanned, multiple inter-occlusal registrations and buccal scans were performed in closed and opened positions. Blender software was used to align the meshes during the post-scan digital workflow. Bite alignment accuracy was assessed and then improved with a strict exclusion protocol. An automated algorithm was used to find rotations between closed stage and open stage meshes.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec003\">\n<jats:title>Results<\/jats:title>\n<jats:p>Our exclusion protocol reduced the bite alignment error significantly (p = 0.001) and the root-mean-square error value of the meshes decreased from 0.09 mm (SD = 0.15) to 0.03 mm (SD = 0.017). However, the remaining translational error caused an unexpectedly large shift in the axis of rotation (mean = 1.35 mm, SD = 0.77) with a 41.83: 1 ratio. As found in other studies, our results showed even a small amount of error during registration can shift the axis of rotation a large amount. This phenomenon will compromise the results of common pantographic methods which assume a rotation axis of the condyle. It also adds valuable information to the concept of instantaneous centers of rotation by revealing their true characteristics.<\/jats:p>\n<\/jats:sec>","DOI":"10.1371\/journal.pone.0285162","type":"journal-article","created":{"date-parts":[[2023,5,3]],"date-time":"2023-05-03T17:35:36Z","timestamp":1683135336000},"page":"e0285162","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":9,"title":["A novel approach for determining instantaneous centers of rotation of the mandible with an intraoral scanner: A preliminary study"],"prefix":"10.1371","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9345-5164","authenticated-orcid":true,"given":"Arpad","family":"Safrany-Fark","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Balazs","family":"Laczi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antal","family":"Nagy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laura","family":"Lengyel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jozsef","family":"Piffko","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emil","family":"Segatto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2023,5,3]]},"reference":[{"key":"pone.0285162.ref001","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1053\/jopr.2002.124356","article-title":"The history of articulators: A critical history of articulators based on geometric theories of mandibular movement: Part I.","volume":"11","author":"EN Starcke","year":"2002","journal-title":"J Prosthodont"},{"key":"pone.0285162.ref002","doi-asserted-by":"crossref","first-page":"661","DOI":"10.1046\/j.1365-2842.1999.00441.x","article-title":"Location of the hinge axis and the kinematic centre in asymptomatic and clicking temporomandibular joints.","volume":"26","author":"A \u0106ati\u0107","year":"1999","journal-title":"J Oral Rehabil."},{"key":"pone.0285162.ref003","first-page":"79","article-title":"Bennett: Movements of the mandible.","author":"NG Bennett","year":"1908","journal-title":"Odontol Sect."},{"key":"pone.0285162.ref004","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1016\/0022-3913(89)90129-7","article-title":"Analysis of rotation centers of various mandibular closures","volume":"61","author":"K. 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