Fracture strength and fracture patterns of root-filled teeth restored with direct resin composite restorations under static and fatigue loading
To assess fracture strength and fracture patterns of root-filled teeth with direct resin composite restorations under static and fatigue loading. MOD cavities plus endodontic access were prepared in 48 premolars. Teeth were root filled and divided into three restorative groups, as follows 1) resin c...
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| Veröffentlicht in: | Operative dentistry 2014-03, Vol.39 (2), p.181-188 |
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| creator | Taha, N A Palamara, J E Messer, H H |
| description | To assess fracture strength and fracture patterns of root-filled teeth with direct resin composite restorations under static and fatigue loading.
MOD cavities plus endodontic access were prepared in 48 premolars. Teeth were root filled and divided into three restorative groups, as follows 1) resin composite; 2) glass ionomer cement (GIC) core and resin composite; and 3) open laminate technique with GIC and resin composite. Teeth were loaded in a servohydraulic material test system. Eight samples in each group were subjected to stepped fatigue loading: a preconditioning load of 100 N (5000 cycles) followed by 30,000 cycles each at 200 N and higher loads in 50-N increments until fracture. Noncycled teeth were subjected to a ramped load. Fracture load, number of cycles, and fracture patterns were recorded. Data were analyzed using two-way analysis of variance and Bonferroni tests.
Fatigue cycling reduced fracture strength significantly (p |
| doi_str_mv | 10.2341/13-006-L |
| format | Article |
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MOD cavities plus endodontic access were prepared in 48 premolars. Teeth were root filled and divided into three restorative groups, as follows 1) resin composite; 2) glass ionomer cement (GIC) core and resin composite; and 3) open laminate technique with GIC and resin composite. Teeth were loaded in a servohydraulic material test system. Eight samples in each group were subjected to stepped fatigue loading: a preconditioning load of 100 N (5000 cycles) followed by 30,000 cycles each at 200 N and higher loads in 50-N increments until fracture. Noncycled teeth were subjected to a ramped load. Fracture load, number of cycles, and fracture patterns were recorded. Data were analyzed using two-way analysis of variance and Bonferroni tests.
Fatigue cycling reduced fracture strength significantly (p<0.001). Teeth restored with a GIC core and a laminate technique were significantly weaker than the composite group (379±56 N, 352±67 N vs 490±78 N, p=0.001). Initial debonding occurred before the tooth underwent fracture. All failures were predominantly adhesive, with subcrestal fracture of the buccal cusp.
Resin composite restorations had significantly higher fracture strength than did other restorations. Fatigue cycled teeth failed at lower load than did noncycled teeth.</description><identifier>ISSN: 0361-7734</identifier><identifier>EISSN: 1559-2863</identifier><identifier>DOI: 10.2341/13-006-L</identifier><identifier>PMID: 23848066</identifier><language>eng</language><publisher>United States</publisher><subject>Bicuspid - surgery ; Composite Resins - therapeutic use ; Dental Restoration, Permanent - adverse effects ; Dental Restoration, Permanent - methods ; Dental Stress Analysis ; Dentistry ; Humans ; Root Canal Obturation - adverse effects ; Root Canal Obturation - methods ; Tooth Fractures - etiology</subject><ispartof>Operative dentistry, 2014-03, Vol.39 (2), p.181-188</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c317t-437af80b9430ccee289951334bc8ef2866b2b76daf9f1be20bd3a184d658a1a23</citedby><cites>FETCH-LOGICAL-c317t-437af80b9430ccee289951334bc8ef2866b2b76daf9f1be20bd3a184d658a1a23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23848066$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Taha, N A</creatorcontrib><creatorcontrib>Palamara, J E</creatorcontrib><creatorcontrib>Messer, H H</creatorcontrib><title>Fracture strength and fracture patterns of root-filled teeth restored with direct resin composite restorations under static and fatigue loading</title><title>Operative dentistry</title><addtitle>Oper Dent</addtitle><description>To assess fracture strength and fracture patterns of root-filled teeth with direct resin composite restorations under static and fatigue loading.
MOD cavities plus endodontic access were prepared in 48 premolars. Teeth were root filled and divided into three restorative groups, as follows 1) resin composite; 2) glass ionomer cement (GIC) core and resin composite; and 3) open laminate technique with GIC and resin composite. Teeth were loaded in a servohydraulic material test system. Eight samples in each group were subjected to stepped fatigue loading: a preconditioning load of 100 N (5000 cycles) followed by 30,000 cycles each at 200 N and higher loads in 50-N increments until fracture. Noncycled teeth were subjected to a ramped load. Fracture load, number of cycles, and fracture patterns were recorded. Data were analyzed using two-way analysis of variance and Bonferroni tests.
Fatigue cycling reduced fracture strength significantly (p<0.001). Teeth restored with a GIC core and a laminate technique were significantly weaker than the composite group (379±56 N, 352±67 N vs 490±78 N, p=0.001). Initial debonding occurred before the tooth underwent fracture. All failures were predominantly adhesive, with subcrestal fracture of the buccal cusp.
Resin composite restorations had significantly higher fracture strength than did other restorations. Fatigue cycled teeth failed at lower load than did noncycled teeth.</description><subject>Bicuspid - surgery</subject><subject>Composite Resins - therapeutic use</subject><subject>Dental Restoration, Permanent - adverse effects</subject><subject>Dental Restoration, Permanent - methods</subject><subject>Dental Stress Analysis</subject><subject>Dentistry</subject><subject>Humans</subject><subject>Root Canal Obturation - adverse effects</subject><subject>Root Canal Obturation - methods</subject><subject>Tooth Fractures - etiology</subject><issn>0361-7734</issn><issn>1559-2863</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkMFKxDAQhoMo7roKPoH06KWaNGmaHmVxVSh40XNJk8kaaZuapIhP4SubZVc9zfzDxz8zP0KXBN8UlJFbQnOMed4coSUpyzovBKfHaIkpJ3lVUbZAZyG8Y8xKVpanaFFQwQTmfIm-N16qOHvIQvQwbuNbJkedmd_pJGMEP4bMmcw7F3Nj-x50FgES6iFE55P8tElp60HF3dCOmXLD5IKNcIBktC7ZzKMGn3YlqfabUredIeud1HbcnqMTI_sAF4e6Qq-b-5f1Y948Pzyt75pcUVLFnNFKGoG7mlGsFEAh6roklLJOCTDpfd4VXcW1NLUhHRS401QSwTQvhSSyoCt0vfedvPuY04XtYIOCvpcjuDm0pMS8EnVVsH9UeReCB9NO3g7Sf7UEt7v4W0LbFH_bJPTq4Dp3A-g_8Ddv-gP2NoMn</recordid><startdate>20140301</startdate><enddate>20140301</enddate><creator>Taha, N A</creator><creator>Palamara, J E</creator><creator>Messer, H H</creator><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></search><sort><creationdate>20140301</creationdate><title>Fracture strength and fracture patterns of root-filled teeth restored with direct resin composite restorations under static and fatigue loading</title><author>Taha, N A ; Palamara, J E ; Messer, H H</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c317t-437af80b9430ccee289951334bc8ef2866b2b76daf9f1be20bd3a184d658a1a23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Bicuspid - surgery</topic><topic>Composite Resins - therapeutic use</topic><topic>Dental Restoration, Permanent - adverse effects</topic><topic>Dental Restoration, Permanent - methods</topic><topic>Dental Stress Analysis</topic><topic>Dentistry</topic><topic>Humans</topic><topic>Root Canal Obturation - adverse effects</topic><topic>Root Canal Obturation - methods</topic><topic>Tooth Fractures - etiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Taha, N A</creatorcontrib><creatorcontrib>Palamara, J E</creatorcontrib><creatorcontrib>Messer, H H</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>Operative dentistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Taha, N A</au><au>Palamara, J E</au><au>Messer, H H</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fracture strength and fracture patterns of root-filled teeth restored with direct resin composite restorations under static and fatigue loading</atitle><jtitle>Operative dentistry</jtitle><addtitle>Oper Dent</addtitle><date>2014-03-01</date><risdate>2014</risdate><volume>39</volume><issue>2</issue><spage>181</spage><epage>188</epage><pages>181-188</pages><issn>0361-7734</issn><eissn>1559-2863</eissn><abstract>To assess fracture strength and fracture patterns of root-filled teeth with direct resin composite restorations under static and fatigue loading.
MOD cavities plus endodontic access were prepared in 48 premolars. Teeth were root filled and divided into three restorative groups, as follows 1) resin composite; 2) glass ionomer cement (GIC) core and resin composite; and 3) open laminate technique with GIC and resin composite. Teeth were loaded in a servohydraulic material test system. Eight samples in each group were subjected to stepped fatigue loading: a preconditioning load of 100 N (5000 cycles) followed by 30,000 cycles each at 200 N and higher loads in 50-N increments until fracture. Noncycled teeth were subjected to a ramped load. Fracture load, number of cycles, and fracture patterns were recorded. Data were analyzed using two-way analysis of variance and Bonferroni tests.
Fatigue cycling reduced fracture strength significantly (p<0.001). Teeth restored with a GIC core and a laminate technique were significantly weaker than the composite group (379±56 N, 352±67 N vs 490±78 N, p=0.001). Initial debonding occurred before the tooth underwent fracture. All failures were predominantly adhesive, with subcrestal fracture of the buccal cusp.
Resin composite restorations had significantly higher fracture strength than did other restorations. Fatigue cycled teeth failed at lower load than did noncycled teeth.</abstract><cop>United States</cop><pmid>23848066</pmid><doi>10.2341/13-006-L</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0361-7734 |
| ispartof | Operative dentistry, 2014-03, Vol.39 (2), p.181-188 |
| issn | 0361-7734 1559-2863 |
| language | eng |
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| source | MEDLINE; Allen Press Miscellaneous; Alma/SFX Local Collection; EZB Electronic Journals Library |
| subjects | Bicuspid - surgery Composite Resins - therapeutic use Dental Restoration, Permanent - adverse effects Dental Restoration, Permanent - methods Dental Stress Analysis Dentistry Humans Root Canal Obturation - adverse effects Root Canal Obturation - methods Tooth Fractures - etiology |
| title | Fracture strength and fracture patterns of root-filled teeth restored with direct resin composite restorations under static and fatigue loading |
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