Effect of Intracoronal Depth of Teeth Restored with Endocrowns on Fracture Resistance: In Vitro and 3-dimensional Finite Element Analysis
Endodontically treated teeth have an increased risk of biomechanical failure because of significant loss of tooth structure. The biomechanical behavior of endodontically treated teeth restored was evaluated using different extensions of endocrowns inside the pulp chamber by in vitro and 3-dimensiona...
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| Veröffentlicht in: | Journal of endodontics 2018-07, Vol.44 (7), p.1179-1185 |
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| creator | Dartora, Nereu Roque de Conto Ferreira, Michele Bertoluzi Moris, Izabela Cristina Maurício Brazão, Elisabeth Helena Spazin, Aloísio Oro Sousa-Neto, Manoel Damião Silva-Sousa, Yara Terezinha Gomes, Erica Alves |
| description | Endodontically treated teeth have an increased risk of biomechanical failure because of significant loss of tooth structure. The biomechanical behavior of endodontically treated teeth restored was evaluated using different extensions of endocrowns inside the pulp chamber by in vitro and 3-dimensional finite element analysis (FEA).
Thirty mandibular human molars were endodontically treated. Standardized endocrown preparations were performed, and the teeth were randomly divided into 3 groups (n = 10) according to different endocrown extensions inside the pulp chamber: G-5 mm, a 5-mm extension; G-3 mm, a 3-mm extension; and G-1 mm, a 1-mm extension. After adhesive cementation, all specimens were subjected to thermocycling and dynamic loading. The survival specimens were subjected to fracture resistance testing at a crosshead speed of 1 mm/min in a universal testing machine. All fractured specimens were subjected to fractography. Data were analyzed by 1-way analysis of variance and the Tukey post hoc test (P |
| doi_str_mv | 10.1016/j.joen.2018.04.008 |
| format | Article |
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Thirty mandibular human molars were endodontically treated. Standardized endocrown preparations were performed, and the teeth were randomly divided into 3 groups (n = 10) according to different endocrown extensions inside the pulp chamber: G-5 mm, a 5-mm extension; G-3 mm, a 3-mm extension; and G-1 mm, a 1-mm extension. After adhesive cementation, all specimens were subjected to thermocycling and dynamic loading. The survival specimens were subjected to fracture resistance testing at a crosshead speed of 1 mm/min in a universal testing machine. All fractured specimens were subjected to fractography. Data were analyzed by 1-way analysis of variance and the Tukey post hoc test (P < .05). Stress distribution patterns in each group were analyzed using FEA. Qualitative analyses were performed according to the von Mises criterion.
After dynamic loading, a survival rate of 100% was observed in all groups. For static loading, statistically significant differences among the groups were observed (P < .05) (G-5 mm = 2008.61 N, G-3 mm = 1795.41 N, and G-1 mm = 1268.12 N). Fractography showed a higher frequency of compression curls for G-5 mm and G-3 mm than for G-1 mm. FEA explained the results of fracture strength testing and fractography.
Greater extension of endocrowns inside the pulp chamber provided better mechanical performance.
•Greater extension of endocrowns led to higher fracture resistance.•Greater extension of endocrowns inside the pulp chamber induced lower stresses.•Endocrowns could be a conservative restorative alternative.</description><identifier>ISSN: 0099-2399</identifier><identifier>EISSN: 1878-3554</identifier><identifier>DOI: 10.1016/j.joen.2018.04.008</identifier><identifier>PMID: 29866407</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Cementation - methods ; Computer-aided design/computer-aided manufacturing ; Crowns - adverse effects ; Dental Prosthesis Design ; Dental Restoration Failure ; Dental Restoration, Permanent - adverse effects ; Dental Restoration, Permanent - methods ; Dental Stress Analysis ; Dentistry ; endocrowns ; endodontically treated teeth ; Finite Element Analysis ; Humans ; In Vitro Techniques ; Molar - surgery ; Tooth, Nonvital - diagnostic imaging ; X-Ray Microtomography</subject><ispartof>Journal of endodontics, 2018-07, Vol.44 (7), p.1179-1185</ispartof><rights>2018 American Association of Endodontists</rights><rights>Copyright © 2018 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c356t-6a85d4540e03c34ea6bbef51f1ec98d4ffeda79642893cbcdeedba751501954f3</citedby><cites>FETCH-LOGICAL-c356t-6a85d4540e03c34ea6bbef51f1ec98d4ffeda79642893cbcdeedba751501954f3</cites><orcidid>0000-0003-1454-8360 ; 0000-0002-7696-7600</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.joen.2018.04.008$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/29866407$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Dartora, Nereu Roque</creatorcontrib><creatorcontrib>de Conto Ferreira, Michele Bertoluzi</creatorcontrib><creatorcontrib>Moris, Izabela Cristina Maurício</creatorcontrib><creatorcontrib>Brazão, Elisabeth Helena</creatorcontrib><creatorcontrib>Spazin, Aloísio Oro</creatorcontrib><creatorcontrib>Sousa-Neto, Manoel Damião</creatorcontrib><creatorcontrib>Silva-Sousa, Yara Terezinha</creatorcontrib><creatorcontrib>Gomes, Erica Alves</creatorcontrib><title>Effect of Intracoronal Depth of Teeth Restored with Endocrowns on Fracture Resistance: In Vitro and 3-dimensional Finite Element Analysis</title><title>Journal of endodontics</title><addtitle>J Endod</addtitle><description>Endodontically treated teeth have an increased risk of biomechanical failure because of significant loss of tooth structure. The biomechanical behavior of endodontically treated teeth restored was evaluated using different extensions of endocrowns inside the pulp chamber by in vitro and 3-dimensional finite element analysis (FEA).
Thirty mandibular human molars were endodontically treated. Standardized endocrown preparations were performed, and the teeth were randomly divided into 3 groups (n = 10) according to different endocrown extensions inside the pulp chamber: G-5 mm, a 5-mm extension; G-3 mm, a 3-mm extension; and G-1 mm, a 1-mm extension. After adhesive cementation, all specimens were subjected to thermocycling and dynamic loading. The survival specimens were subjected to fracture resistance testing at a crosshead speed of 1 mm/min in a universal testing machine. All fractured specimens were subjected to fractography. Data were analyzed by 1-way analysis of variance and the Tukey post hoc test (P < .05). Stress distribution patterns in each group were analyzed using FEA. Qualitative analyses were performed according to the von Mises criterion.
After dynamic loading, a survival rate of 100% was observed in all groups. For static loading, statistically significant differences among the groups were observed (P < .05) (G-5 mm = 2008.61 N, G-3 mm = 1795.41 N, and G-1 mm = 1268.12 N). Fractography showed a higher frequency of compression curls for G-5 mm and G-3 mm than for G-1 mm. FEA explained the results of fracture strength testing and fractography.
Greater extension of endocrowns inside the pulp chamber provided better mechanical performance.
•Greater extension of endocrowns led to higher fracture resistance.•Greater extension of endocrowns inside the pulp chamber induced lower stresses.•Endocrowns could be a conservative restorative alternative.</description><subject>Cementation - methods</subject><subject>Computer-aided design/computer-aided manufacturing</subject><subject>Crowns - adverse effects</subject><subject>Dental Prosthesis Design</subject><subject>Dental Restoration Failure</subject><subject>Dental Restoration, Permanent - adverse effects</subject><subject>Dental Restoration, Permanent - methods</subject><subject>Dental Stress Analysis</subject><subject>Dentistry</subject><subject>endocrowns</subject><subject>endodontically treated teeth</subject><subject>Finite Element Analysis</subject><subject>Humans</subject><subject>In Vitro Techniques</subject><subject>Molar - surgery</subject><subject>Tooth, Nonvital - diagnostic imaging</subject><subject>X-Ray Microtomography</subject><issn>0099-2399</issn><issn>1878-3554</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9UUFuFDEQtBCILIEPcEA-cpnBHtszNuIShV2IFAkpSrhaHrtHeDVrL7Y3Ub7AK3gLL8PDhhxz6u5SVUnVhdBbSlpKaP9h224jhLYjVLaEt4TIZ2hF5SAbJgR_jlaEKNV0TKkT9CrnLSF0YGx4iU46Jfuek2GFfq2nCWzBccIXoSRjY4rBzPgz7MuPBb0GqMsV5BITOHzn67UOLtoU70LGMeBNVZVDgoXkczHBwsdq9uf3d19SxCY4zBrndxCy_-e98cEXwOsZKlbwWcXuq_I1ejGZOcObh3mKbjbr6_OvzeW3LxfnZ5eNZaIvTW-kcFxwAoRZxsH04wiToBMFq6TjNY8zg-p5JxWzo3UAbjSDoIJQJfjETtH7o-8-xZ-HGkzvfLYwzyZAPGTdEUG4HJSQldodqTVtzgkmvU9-Z9K9pkQvHeitXjrQSweacF07qKJ3D_6HcQfuUfL_6ZXw6UiAmvLWQ9LZeqhvcz7VLrSL_in_vwegm2A</recordid><startdate>201807</startdate><enddate>201807</enddate><creator>Dartora, Nereu Roque</creator><creator>de Conto Ferreira, Michele Bertoluzi</creator><creator>Moris, Izabela Cristina Maurício</creator><creator>Brazão, Elisabeth Helena</creator><creator>Spazin, Aloísio Oro</creator><creator>Sousa-Neto, Manoel Damião</creator><creator>Silva-Sousa, Yara Terezinha</creator><creator>Gomes, Erica Alves</creator><general>Elsevier Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-1454-8360</orcidid><orcidid>https://orcid.org/0000-0002-7696-7600</orcidid></search><sort><creationdate>201807</creationdate><title>Effect of Intracoronal Depth of Teeth Restored with Endocrowns on Fracture Resistance: In Vitro and 3-dimensional Finite Element Analysis</title><author>Dartora, Nereu Roque ; de Conto Ferreira, Michele Bertoluzi ; Moris, Izabela Cristina Maurício ; Brazão, Elisabeth Helena ; Spazin, Aloísio Oro ; Sousa-Neto, Manoel Damião ; Silva-Sousa, Yara Terezinha ; Gomes, Erica Alves</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-6a85d4540e03c34ea6bbef51f1ec98d4ffeda79642893cbcdeedba751501954f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Cementation - methods</topic><topic>Computer-aided design/computer-aided manufacturing</topic><topic>Crowns - adverse effects</topic><topic>Dental Prosthesis Design</topic><topic>Dental Restoration Failure</topic><topic>Dental Restoration, Permanent - adverse effects</topic><topic>Dental Restoration, Permanent - methods</topic><topic>Dental Stress Analysis</topic><topic>Dentistry</topic><topic>endocrowns</topic><topic>endodontically treated teeth</topic><topic>Finite Element Analysis</topic><topic>Humans</topic><topic>In Vitro Techniques</topic><topic>Molar - surgery</topic><topic>Tooth, Nonvital - diagnostic imaging</topic><topic>X-Ray Microtomography</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dartora, Nereu Roque</creatorcontrib><creatorcontrib>de Conto Ferreira, Michele Bertoluzi</creatorcontrib><creatorcontrib>Moris, Izabela Cristina Maurício</creatorcontrib><creatorcontrib>Brazão, Elisabeth Helena</creatorcontrib><creatorcontrib>Spazin, Aloísio Oro</creatorcontrib><creatorcontrib>Sousa-Neto, Manoel Damião</creatorcontrib><creatorcontrib>Silva-Sousa, Yara Terezinha</creatorcontrib><creatorcontrib>Gomes, Erica Alves</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of endodontics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dartora, Nereu Roque</au><au>de Conto Ferreira, Michele Bertoluzi</au><au>Moris, Izabela Cristina Maurício</au><au>Brazão, Elisabeth Helena</au><au>Spazin, Aloísio Oro</au><au>Sousa-Neto, Manoel Damião</au><au>Silva-Sousa, Yara Terezinha</au><au>Gomes, Erica Alves</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Intracoronal Depth of Teeth Restored with Endocrowns on Fracture Resistance: In Vitro and 3-dimensional Finite Element Analysis</atitle><jtitle>Journal of endodontics</jtitle><addtitle>J Endod</addtitle><date>2018-07</date><risdate>2018</risdate><volume>44</volume><issue>7</issue><spage>1179</spage><epage>1185</epage><pages>1179-1185</pages><issn>0099-2399</issn><eissn>1878-3554</eissn><abstract>Endodontically treated teeth have an increased risk of biomechanical failure because of significant loss of tooth structure. The biomechanical behavior of endodontically treated teeth restored was evaluated using different extensions of endocrowns inside the pulp chamber by in vitro and 3-dimensional finite element analysis (FEA).
Thirty mandibular human molars were endodontically treated. Standardized endocrown preparations were performed, and the teeth were randomly divided into 3 groups (n = 10) according to different endocrown extensions inside the pulp chamber: G-5 mm, a 5-mm extension; G-3 mm, a 3-mm extension; and G-1 mm, a 1-mm extension. After adhesive cementation, all specimens were subjected to thermocycling and dynamic loading. The survival specimens were subjected to fracture resistance testing at a crosshead speed of 1 mm/min in a universal testing machine. All fractured specimens were subjected to fractography. Data were analyzed by 1-way analysis of variance and the Tukey post hoc test (P < .05). Stress distribution patterns in each group were analyzed using FEA. Qualitative analyses were performed according to the von Mises criterion.
After dynamic loading, a survival rate of 100% was observed in all groups. For static loading, statistically significant differences among the groups were observed (P < .05) (G-5 mm = 2008.61 N, G-3 mm = 1795.41 N, and G-1 mm = 1268.12 N). Fractography showed a higher frequency of compression curls for G-5 mm and G-3 mm than for G-1 mm. FEA explained the results of fracture strength testing and fractography.
Greater extension of endocrowns inside the pulp chamber provided better mechanical performance.
•Greater extension of endocrowns led to higher fracture resistance.•Greater extension of endocrowns inside the pulp chamber induced lower stresses.•Endocrowns could be a conservative restorative alternative.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>29866407</pmid><doi>10.1016/j.joen.2018.04.008</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0003-1454-8360</orcidid><orcidid>https://orcid.org/0000-0002-7696-7600</orcidid></addata></record> |
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| subjects | Cementation - methods Computer-aided design/computer-aided manufacturing Crowns - adverse effects Dental Prosthesis Design Dental Restoration Failure Dental Restoration, Permanent - adverse effects Dental Restoration, Permanent - methods Dental Stress Analysis Dentistry endocrowns endodontically treated teeth Finite Element Analysis Humans In Vitro Techniques Molar - surgery Tooth, Nonvital - diagnostic imaging X-Ray Microtomography |
| title | Effect of Intracoronal Depth of Teeth Restored with Endocrowns on Fracture Resistance: In Vitro and 3-dimensional Finite Element Analysis |
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