Effect of different restorative design and materials on stress distribution in cracked teeth: a finite element analysis study.

Effect of different restorative design and materials on stress distribution in cracked teeth: a finite element analysis study. | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Effect of different restorative design and materials on stress distribution in cracked teeth: a finite element analysis study. Ting Liu, Hong Liu, Jiali Meng, Yajing Liu, Yuan Wei, Yequan Huang, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4663127/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 07 Jan, 2025 Read the published version in BMC Oral Health → Version 1 posted 4 You are reading this latest preprint version Abstract Objectives To compare stress distribution and crack propagation in cracked mandibular first molar restored with onlay, overlay, and two types of occlusal veneers with two different CAD/CAM materials by Finite Element Analysis (FEA). Materials and methods A mandibular first molar was digitized using a micro-CT scanner. Three-dimensional dynamic scan data were transformed, and a 3D model of a cracked tooth was generated. Finite element models of four different models (onlay, overlay, and two types of occlusal veneer restored teeth) were designed. Two different CAD/CAM materials, including Lava Ultimate (LU) and IPS e.max CAD (EMX), were specified for both models. Each model was subjected to three different force loads on the occlusal surfaces. Stress distribution patterns and the maximum von Mises (VM) stresses were calculated and compared. Results Compared to the base model, all restorations showed high-stress concentration moved from the lower margin of the crack area towards the top of the crack area. The EMX-restored onlay, overlay, and occlusal veneer 2 had the lowest stress in the cracked area and the lowest average von Mises stress levels at the lower margin along the cracked line, especially under the 225N lateral force ( P < 0.05). The occlusal veneer 1 filled with resin had a poorer stress distribution and higher stress concentration of stress at the remaining crack than the occlusal veneer 2 without resin filled inside. Conclusions The EMX restorations with onlay, overlay, and occlusal veneer 2 showed lower stress concentration at the crack surface's lower margin compared to the LU-restored models. The occlusal veneer with internal resin filler exhibited higher stress on the end of the lower margin of the crack surface. Clinical relevance Our results suggest that onlay, overlay ceramic restorations and occlusal veneer (without resin filling inside) may be a favorable method to prevent further crack propagation. Finite element analysis Cracked tooth Restoration design Occlusal veneer Mechanical properties Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 07 Jan, 2025 Read the published version in BMC Oral Health → Version 1 posted Editorial decision: Revision requested 09 Jul, 2024 Editor assigned by journal 05 Jul, 2024 Submission checks completed at journal 05 Jul, 2024 First submitted to journal 30 Jun, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4663127","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":324505534,"identity":"97132e57-5702-4820-bc76-2bd04ab9fb16","order_by":0,"name":"Ting Liu","email":"","orcid":"","institution":"Nanjing Stomatological Hospital","correspondingAuthor":false,"prefix":"","firstName":"Ting","middleName":"","lastName":"Liu","suffix":""},{"id":324505535,"identity":"a77b6f01-654e-42eb-a223-2822fa224666","order_by":1,"name":"Hong Liu","email":"","orcid":"","institution":"Nanjing Stomatological 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study.","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"bmc-oral-health","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"ohea","sideBox":"Learn more about [BMC Oral Health](http://bmcoralhealth.biomedcentral.com/)","snPcode":"","submissionUrl":"https://www.editorialmanager.com/ohea/default.aspx","title":"BMC Oral Health","twitterHandle":"BMC_series","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"em","reportingPortfolio":"BMC Series","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"Finite element analysis, Cracked tooth, Restoration design, Occlusal veneer, Mechanical properties","lastPublishedDoi":"10.21203/rs.3.rs-4663127/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4663127/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003ch2\u003eObjectives\u003c/h2\u003e \u003cp\u003eTo compare stress distribution and crack propagation in cracked mandibular first molar restored with onlay, overlay, and two types of occlusal veneers with two different CAD/CAM materials by Finite Element Analysis (FEA).\u003c/p\u003e\u003ch2\u003eMaterials and methods\u003c/h2\u003e \u003cp\u003eA mandibular first molar was digitized using a micro-CT scanner. Three-dimensional dynamic scan data were transformed, and a 3D model of a cracked tooth was generated. Finite element models of four different models (onlay, overlay, and two types of occlusal veneer restored teeth) were designed. Two different CAD/CAM materials, including Lava Ultimate (LU) and IPS e.max CAD (EMX), were specified for both models. Each model was subjected to three different force loads on the occlusal surfaces. Stress distribution patterns and the maximum von Mises (VM) stresses were calculated and compared.\u003c/p\u003e\u003ch2\u003eResults\u003c/h2\u003e \u003cp\u003eCompared to the base model, all restorations showed high-stress concentration moved from the lower margin of the crack area towards the top of the crack area. The EMX-restored onlay, overlay, and occlusal veneer 2 had the lowest stress in the cracked area and the lowest average von Mises stress levels at the lower margin along the cracked line, especially under the 225N lateral force (\u003cem\u003eP\u003c/em\u003e\u0026thinsp;\u0026lt;\u0026thinsp;0.05). The occlusal veneer 1 filled with resin had a poorer stress distribution and higher stress concentration of stress at the remaining crack than the occlusal veneer 2 without resin filled inside.\u003c/p\u003e\u003ch2\u003eConclusions\u003c/h2\u003e \u003cp\u003eThe EMX restorations with onlay, overlay, and occlusal veneer 2 showed lower stress concentration at the crack surface's lower margin compared to the LU-restored models. The occlusal veneer with internal resin filler exhibited higher stress on the end of the lower margin of the crack surface.\u003c/p\u003e\u003ch2\u003eClinical relevance\u003c/h2\u003e \u003cp\u003eOur results suggest that onlay, overlay ceramic restorations and occlusal veneer (without resin filling inside) may be a favorable method to prevent further crack propagation.\u003c/p\u003e","manuscriptTitle":"Effect of different restorative design and materials on stress distribution in cracked teeth: a finite element analysis study.","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-07-30 14:16:51","doi":"10.21203/rs.3.rs-4663127/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2024-07-09T05:45:04+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2024-07-05T11:49:43+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2024-07-05T11:47:04+00:00","index":"","fulltext":""},{"type":"submitted","content":"BMC Oral Health","date":"2024-06-30T14:21:21+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"bmc-oral-health","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"ohea","sideBox":"Learn more about [BMC Oral Health](http://bmcoralhealth.biomedcentral.com/)","snPcode":"","submissionUrl":"https://www.editorialmanager.com/ohea/default.aspx","title":"BMC Oral Health","twitterHandle":"BMC_series","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"em","reportingPortfolio":"BMC Series","inReviewEnabled":true,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"cad84c30-a94c-4d61-a532-42884dd6a724","owner":[],"postedDate":"July 30th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2025-01-13T16:07:27+00:00","versionOfRecord":{"articleIdentity":"rs-4663127","link":"https://doi.org/10.1186/s12903-024-05122-8","journal":{"identity":"bmc-oral-health","isVorOnly":false,"title":"BMC Oral Health"},"publishedOn":"2025-01-07 15:57:50","publishedOnDateReadable":"January 7th, 2025"},"versionCreatedAt":"2024-07-30 14:16:51","video":"","vorDoi":"10.1186/s12903-024-05122-8","vorDoiUrl":"https://doi.org/10.1186/s12903-024-05122-8","workflowStages":[]},"version":"v1","identity":"rs-4663127","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4663127","identity":"rs-4663127","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}