A novel approach for determining instantaneous centers of rotation of the mandible with an intraoral scanner: A preliminary study
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 o...
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| Veröffentlicht in: | PloS one 2023-05, Vol.18 (5), p.e0285162-e0285162 |
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| creator | Safrany-Fark, Arpad Laczi, Balazs Nagy, Antal Lengyel, Laura Piffko, Jozsef Segatto, Emil |
| description | 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.
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.
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. |
| doi_str_mv | 10.1371/journal.pone.0285162 |
| format | Article |
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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.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0285162</identifier><identifier>PMID: 37134120</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Accuracy ; Algorithms ; Alignment ; Analysis ; Axes of rotation ; Biology and Life Sciences ; Care and treatment ; Composite materials ; Computer and Information Sciences ; Computer-Aided Design ; Dentistry ; Engineering and Technology ; Humans ; Imaging, Three-Dimensional ; Jaw ; Mandible ; Mandible - diagnostic imaging ; Medicine and Health Sciences ; Methods ; Models, Dental ; Movement ; Oral health ; Patient compliance ; Physical Sciences ; Registration ; Research and Analysis Methods ; Scanners ; Software ; Technology application ; Temporomandibular joint ; Workflow</subject><ispartof>PloS one, 2023-05, Vol.18 (5), p.e0285162-e0285162</ispartof><rights>Copyright: © 2023 Safrany-Fark et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</rights><rights>COPYRIGHT 2023 Public Library of Science</rights><rights>2023 Safrany-Fark et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2023 Safrany-Fark et al 2023 Safrany-Fark et al</rights><rights>2023 Safrany-Fark et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c693t-38c14da5817412b1633ec56b95bd84c2a06c822d701b72304dd3f952e3384f193</citedby><cites>FETCH-LOGICAL-c693t-38c14da5817412b1633ec56b95bd84c2a06c822d701b72304dd3f952e3384f193</cites><orcidid>0000-0002-9345-5164</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC10156001/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC10156001/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,2096,2915,23845,27901,27902,53766,53768,79342,79343</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/37134120$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Safrany-Fark, Arpad</creatorcontrib><creatorcontrib>Laczi, Balazs</creatorcontrib><creatorcontrib>Nagy, Antal</creatorcontrib><creatorcontrib>Lengyel, Laura</creatorcontrib><creatorcontrib>Piffko, Jozsef</creatorcontrib><creatorcontrib>Segatto, Emil</creatorcontrib><title>A novel approach for determining instantaneous centers of rotation of the mandible with an intraoral scanner: A preliminary study</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>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.
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.
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.</description><subject>Accuracy</subject><subject>Algorithms</subject><subject>Alignment</subject><subject>Analysis</subject><subject>Axes of rotation</subject><subject>Biology and Life Sciences</subject><subject>Care and treatment</subject><subject>Composite materials</subject><subject>Computer and Information Sciences</subject><subject>Computer-Aided Design</subject><subject>Dentistry</subject><subject>Engineering and Technology</subject><subject>Humans</subject><subject>Imaging, Three-Dimensional</subject><subject>Jaw</subject><subject>Mandible</subject><subject>Mandible - diagnostic imaging</subject><subject>Medicine and Health Sciences</subject><subject>Methods</subject><subject>Models, Dental</subject><subject>Movement</subject><subject>Oral health</subject><subject>Patient compliance</subject><subject>Physical 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study</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2023-05-03</date><risdate>2023</risdate><volume>18</volume><issue>5</issue><spage>e0285162</spage><epage>e0285162</epage><pages>e0285162-e0285162</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>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.
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.
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.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>37134120</pmid><doi>10.1371/journal.pone.0285162</doi><tpages>e0285162</tpages><orcidid>https://orcid.org/0000-0002-9345-5164</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Accuracy Algorithms Alignment Analysis Axes of rotation Biology and Life Sciences Care and treatment Composite materials Computer and Information Sciences Computer-Aided Design Dentistry Engineering and Technology Humans Imaging, Three-Dimensional Jaw Mandible Mandible - diagnostic imaging Medicine and Health Sciences Methods Models, Dental Movement Oral health Patient compliance Physical Sciences Registration Research and Analysis Methods Scanners Software Technology application Temporomandibular joint Workflow |
| title | A novel approach for determining instantaneous centers of rotation of the mandible with an intraoral scanner: A preliminary study |
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