{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T10:18:24Z","timestamp":1787653104232,"version":"build-2736575974"},"reference-count":24,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T00:00:00Z","timestamp":1787616000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Bioengineering"],"abstract":"<jats:p>Scan-assisted interocclusal registration may vary with record extent and occlusal support. Using separately fabricated high-hardness vinyl polysiloxane (VPS) records, a fixed bilateral buccal intraoral scanner (IOS) acquisition protocol, optical reference articulations, and position-level three-dimensional analysis, this in vitro study compared prepared-tooth (Hard-Prep) and complete-arch (Hard-Arch) records across three support configurations and assessed a no-record IOS workflow. Ninety VPS-based and 45 no-record IOS acquisitions were analyzed. VPS records were fabricated under a 3.0 kg load; measurements used a 1.0 kg load. Overall three-dimensional deviation (dXYZ) was averaged over five mandibular positions. Log-transformed dXYZ was analyzed by ordinary least squares with Holm-adjusted contrasts. The Hard-Arch\/Hard-Prep contrast was not statistically significant under bilateral extended support. Hard-Arch showed higher dXYZ under unilateral extended support (ratio, 1.75; 95% confidence interval (CI), 1.54\u20131.99; p &lt; 0.001) and unilateral limited support (ratio, 1.58; 95% CI, 1.39\u20131.80; p &lt; 0.001). In the no-record workflow, unilateral extended support exceeded bilateral extended support (ratio, 1.50; 95% CI, 1.31\u20131.72; p &lt; 0.001), whereas unilateral limited support was lower than unilateral extended support (ratio, 0.68; 95% CI, 0.59\u20130.77; p &lt; 0.001). Prepared-tooth records yielded lower deviation in both unilateral configurations, while the no-record workflow varied with support configuration.<\/jats:p>","DOI":"10.3390\/bioengineering13090973","type":"journal-article","created":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T09:04:30Z","timestamp":1787648670000},"page":"973","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Record Extent and Occlusal Support in Scan-Assisted Interocclusal Registration: A Three-Dimensional In Vitro Study"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5900-1273","authenticated-orcid":false,"given":"Ragai Edward","family":"Matta","sequence":"first","affiliation":[{"name":"Dental Clinic 2, Department of Prosthodontics, University Hospital Erlangen, Friedrich-Alexander-Universit\u00e4t Erlangen-N\u00fcrnberg (FAU), Gl\u00fcckstrasse 11, 91054 Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-4327-007X","authenticated-orcid":false,"given":"Paula","family":"T\u00f6pel","sequence":"additional","affiliation":[{"name":"Dental Clinic 2, Department of Prosthodontics, University Hospital Erlangen, Friedrich-Alexander-Universit\u00e4t Erlangen-N\u00fcrnberg (FAU), Gl\u00fcckstrasse 11, 91054 Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fabian","family":"Lotz","sequence":"additional","affiliation":[{"name":"Dental Clinic 2, Department of Prosthodontics, University Hospital Erlangen, Friedrich-Alexander-Universit\u00e4t Erlangen-N\u00fcrnberg (FAU), Gl\u00fcckstrasse 11, 91054 Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manfred","family":"Wichmann","sequence":"additional","affiliation":[{"name":"Dental Clinic 2, Department of Prosthodontics, University Hospital Erlangen, Friedrich-Alexander-Universit\u00e4t Erlangen-N\u00fcrnberg (FAU), Gl\u00fcckstrasse 11, 91054 Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9240-7718","authenticated-orcid":false,"given":"Johannes Matthias","family":"Ries","sequence":"additional","affiliation":[{"name":"Dental Clinic 2, Department of Prosthodontics, University Hospital Erlangen, Friedrich-Alexander-Universit\u00e4t Erlangen-N\u00fcrnberg (FAU), Gl\u00fcckstrasse 11, 91054 Erlangen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"104718","DOI":"10.1016\/j.jdent.2023.104718","article-title":"Factors that influence the accuracy of maxillomandibular relationship at maximum intercuspation acquired by using intraoral scanners: A systematic review","volume":"138","author":"Barmak","year":"2023","journal-title":"J. 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