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After the simulated access cavity preparations, root canal treatment was simulated and three different static loads which mimicked oblique and vertical mastication forces were applied to the models. The stress distribution and maximum Von Misses stress values were recorded. The maximum stress values were obtained on both enamel and dentin under multi-point vertical loads.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The maximum stress values were obtained on both enamel and dentin under multi-point vertical loads. Under all load types, the minimum stress distribution was observed in the control group, followed by CEC, NEC and BEC designs. The highest stress concentration was detected in Cd-EC and TEC-II designs. Under single-point vertical loading, the stress was mostly concentrated in the lingual PCD area, while under multi-point vertical loading, the entire root surface was stress-loaded except for the lingual apical third of the root.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Preserving tooth tissue by simulating CEC, NEC and BEC access cavities increased the load capacity of a single-rooted mandibular first premolar following simulated endodontic treatment.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00784-024-05808-x","type":"journal-article","created":{"date-parts":[[2024,7,19]],"date-time":"2024-07-19T01:01:31Z","timestamp":1721350891000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Influence of endodontic access cavity design on mechanical properties of a first mandibular premolar tooth: a finite element analysis study"],"prefix":"10.1007","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3299-3361","authenticated-orcid":false,"given":"Taha","family":"\u00d6zy\u00fcrek","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3176-1251","authenticated-orcid":false,"given":"G\u00fcl\u015fah","family":"Uslu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5757-0571","authenticated-orcid":false,"given":"Bur\u00e7in","family":"Ar\u0131can","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6394-0791","authenticated-orcid":false,"given":"Mustafa","family":"G\u00fcndo\u011far","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad Hossein","family":"Nekoofar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul Michael Howell","family":"Dummer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,7,19]]},"reference":[{"key":"5808_CR1","doi-asserted-by":"publisher","first-page":"249","DOI":"10.1016\/j.cden.2010.01.001","volume":"54","author":"D Clark","year":"2020","unstructured":"Clark D, Khademi J (2020) Modern molar endodontic access and directed dentin conservation. 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