The effect of the elastic modulus of endodontic posts on static load failure
Stewardson DA, Shortall AC, Marquis PM. The effect of the elastic modulus of endodontic posts on static load failure. International Endodontic Journal, 44, 458–468, 2011. Aim To compare posts of different flexibility using static load testing. Hypotheses tested were (1) the flexural modulus of endo...
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| description | Stewardson DA, Shortall AC, Marquis PM. The effect of the elastic modulus of endodontic posts on static load failure. International Endodontic Journal, 44, 458–468, 2011.
Aim To compare posts of different flexibility using static load testing. Hypotheses tested were (1) the flexural modulus of endodontic posts does not show a linear relationship with failure load and (2) the flexural modulus of endodontic posts does not show an association with failure mode.
Methodology Thirty 2 mm diameter rods of a glass fibre material Aesthetiplus (A), a carbon fibre Composipost (C) and stainless steel (S) were cemented into 90 roots of extracted human teeth using resin cement. Composite resin cores were added and the roots embedded in self‐curing acrylic resin. Samples were loaded at 90° in a universal testing machine until failure. Failure loads and fracture levels were compared using one‐way anova and post‐hoc Scheffé tests. Proportions of different failure modes were compared with Chi square tests (α = 0.05).
Results Mean failure loads – MPa (SD) were A – 278.69 (85.79), C – 258.86 (82.05), S – 347.37 (74.50). There was no significant difference in the mean failure load of roots containing the FRC posts (P = 0.639), but it was significantly greater for steel post samples (P |
| doi_str_mv | 10.1111/j.1365-2591.2011.01851.x |
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Aim To compare posts of different flexibility using static load testing. Hypotheses tested were (1) the flexural modulus of endodontic posts does not show a linear relationship with failure load and (2) the flexural modulus of endodontic posts does not show an association with failure mode.
Methodology Thirty 2 mm diameter rods of a glass fibre material Aesthetiplus (A), a carbon fibre Composipost (C) and stainless steel (S) were cemented into 90 roots of extracted human teeth using resin cement. Composite resin cores were added and the roots embedded in self‐curing acrylic resin. Samples were loaded at 90° in a universal testing machine until failure. Failure loads and fracture levels were compared using one‐way anova and post‐hoc Scheffé tests. Proportions of different failure modes were compared with Chi square tests (α = 0.05).
Results Mean failure loads – MPa (SD) were A – 278.69 (85.79), C – 258.86 (82.05), S – 347.37 (74.50). There was no significant difference in the mean failure load of roots containing the FRC posts (P = 0.639), but it was significantly greater for steel post samples (P < 0.01). The mean level of fracture among the groups was not significantly different (P = 0.879). No root fractures were ‘favourable’. Significantly more root fractures and fewer core fractures occurred for group A than for groups C or S (P < 0.01).
Conclusion The elastic modulus of an endodontic post does not appear to be a principal factor influencing load at failure or mode of failure of post‐restored teeth.</description><identifier>ISSN: 0143-2885</identifier><identifier>EISSN: 1365-2591</identifier><identifier>DOI: 10.1111/j.1365-2591.2011.01851.x</identifier><identifier>PMID: 21276015</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Carbon ; Composite Resins - chemistry ; Composite Resins - therapeutic use ; Dental Bonding - methods ; Dental Materials ; Dental Prosthesis Design ; Dental Restoration Failure ; Dental Stress Analysis ; Dentistry ; Elastic Modulus ; endodontic post ; fibre-reinforced composite ; fracture ; Humans ; Materials Testing ; Pliability ; Post and Core Technique - instrumentation ; root ; Root Canal Therapy - instrumentation ; static loading</subject><ispartof>International endodontic journal, 2011-05, Vol.44 (5), p.458-468</ispartof><rights>2011 International Endodontic Journal</rights><rights>2011 International Endodontic Journal.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4721-a22640e0410cc2428d5c4c4affb29177557fee6b4259c76452497d8c2e8c203c3</citedby><cites>FETCH-LOGICAL-c4721-a22640e0410cc2428d5c4c4affb29177557fee6b4259c76452497d8c2e8c203c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1365-2591.2011.01851.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1365-2591.2011.01851.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,777,781,1412,27905,27906,45555,45556</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21276015$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Stewardson, D. A.</creatorcontrib><creatorcontrib>Shortall, A. C.</creatorcontrib><creatorcontrib>Marquis, P. M.</creatorcontrib><title>The effect of the elastic modulus of endodontic posts on static load failure</title><title>International endodontic journal</title><addtitle>Int Endod J</addtitle><description>Stewardson DA, Shortall AC, Marquis PM. The effect of the elastic modulus of endodontic posts on static load failure. International Endodontic Journal, 44, 458–468, 2011.
Aim To compare posts of different flexibility using static load testing. Hypotheses tested were (1) the flexural modulus of endodontic posts does not show a linear relationship with failure load and (2) the flexural modulus of endodontic posts does not show an association with failure mode.
Methodology Thirty 2 mm diameter rods of a glass fibre material Aesthetiplus (A), a carbon fibre Composipost (C) and stainless steel (S) were cemented into 90 roots of extracted human teeth using resin cement. Composite resin cores were added and the roots embedded in self‐curing acrylic resin. Samples were loaded at 90° in a universal testing machine until failure. Failure loads and fracture levels were compared using one‐way anova and post‐hoc Scheffé tests. Proportions of different failure modes were compared with Chi square tests (α = 0.05).
Results Mean failure loads – MPa (SD) were A – 278.69 (85.79), C – 258.86 (82.05), S – 347.37 (74.50). There was no significant difference in the mean failure load of roots containing the FRC posts (P = 0.639), but it was significantly greater for steel post samples (P < 0.01). The mean level of fracture among the groups was not significantly different (P = 0.879). No root fractures were ‘favourable’. Significantly more root fractures and fewer core fractures occurred for group A than for groups C or S (P < 0.01).
Conclusion The elastic modulus of an endodontic post does not appear to be a principal factor influencing load at failure or mode of failure of post‐restored teeth.</description><subject>Carbon</subject><subject>Composite Resins - chemistry</subject><subject>Composite Resins - therapeutic use</subject><subject>Dental Bonding - methods</subject><subject>Dental Materials</subject><subject>Dental Prosthesis Design</subject><subject>Dental Restoration Failure</subject><subject>Dental Stress Analysis</subject><subject>Dentistry</subject><subject>Elastic Modulus</subject><subject>endodontic post</subject><subject>fibre-reinforced composite</subject><subject>fracture</subject><subject>Humans</subject><subject>Materials Testing</subject><subject>Pliability</subject><subject>Post and Core Technique - instrumentation</subject><subject>root</subject><subject>Root Canal Therapy - instrumentation</subject><subject>static loading</subject><issn>0143-2885</issn><issn>1365-2591</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkMFPwyAUxonRuDn9F0xvnlp5FEp38GAWN2cWPajReCGMPmJnN2Zp4_zvLW7uLAnhvY_ve4QfIRHQBLp1uUggzUTMxBASRgESCrmAZHNA-vuLQ9KnwNOY5bnokRPvF5RSQVM4Jj0GTGYURJ_Mnt4xQmvRNJGzURO6SvumNNHSFW3V-iDjqnCFWwV17XzTaavINzr0ldNFZHVZtTWekiOrK49nu3NAnsc3T6PbePYwmY6uZ7HhkkGsGcs4RcqBGsM4ywthuOHa2jkbgpRCSIuYzXn3DSMzLhgfyiI3DLtNU5MOyMV27rp2ny36Ri1Lb7Cq9Apd61UuZA4ZgOyc-dZpaud9jVat63Kp628FVAWUaqECMRWIqYBS_aJUmy56vnuknS-x2Af_2HWGq63hq6zw-9-D1fTmLlRdPt7mS9_gZp_X9YfKZCqFermfqMdXlr3Jxxc1Tn8A31OQFA</recordid><startdate>201105</startdate><enddate>201105</enddate><creator>Stewardson, D. A.</creator><creator>Shortall, A. C.</creator><creator>Marquis, P. M.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><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>201105</creationdate><title>The effect of the elastic modulus of endodontic posts on static load failure</title><author>Stewardson, D. A. ; Shortall, A. C. ; Marquis, P. M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4721-a22640e0410cc2428d5c4c4affb29177557fee6b4259c76452497d8c2e8c203c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Carbon</topic><topic>Composite Resins - chemistry</topic><topic>Composite Resins - therapeutic use</topic><topic>Dental Bonding - methods</topic><topic>Dental Materials</topic><topic>Dental Prosthesis Design</topic><topic>Dental Restoration Failure</topic><topic>Dental Stress Analysis</topic><topic>Dentistry</topic><topic>Elastic Modulus</topic><topic>endodontic post</topic><topic>fibre-reinforced composite</topic><topic>fracture</topic><topic>Humans</topic><topic>Materials Testing</topic><topic>Pliability</topic><topic>Post and Core Technique - instrumentation</topic><topic>root</topic><topic>Root Canal Therapy - instrumentation</topic><topic>static loading</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Stewardson, D. A.</creatorcontrib><creatorcontrib>Shortall, A. C.</creatorcontrib><creatorcontrib>Marquis, P. M.</creatorcontrib><collection>Istex</collection><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>International endodontic journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Stewardson, D. A.</au><au>Shortall, A. C.</au><au>Marquis, P. M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effect of the elastic modulus of endodontic posts on static load failure</atitle><jtitle>International endodontic journal</jtitle><addtitle>Int Endod J</addtitle><date>2011-05</date><risdate>2011</risdate><volume>44</volume><issue>5</issue><spage>458</spage><epage>468</epage><pages>458-468</pages><issn>0143-2885</issn><eissn>1365-2591</eissn><abstract>Stewardson DA, Shortall AC, Marquis PM. The effect of the elastic modulus of endodontic posts on static load failure. International Endodontic Journal, 44, 458–468, 2011.
Aim To compare posts of different flexibility using static load testing. Hypotheses tested were (1) the flexural modulus of endodontic posts does not show a linear relationship with failure load and (2) the flexural modulus of endodontic posts does not show an association with failure mode.
Methodology Thirty 2 mm diameter rods of a glass fibre material Aesthetiplus (A), a carbon fibre Composipost (C) and stainless steel (S) were cemented into 90 roots of extracted human teeth using resin cement. Composite resin cores were added and the roots embedded in self‐curing acrylic resin. Samples were loaded at 90° in a universal testing machine until failure. Failure loads and fracture levels were compared using one‐way anova and post‐hoc Scheffé tests. Proportions of different failure modes were compared with Chi square tests (α = 0.05).
Results Mean failure loads – MPa (SD) were A – 278.69 (85.79), C – 258.86 (82.05), S – 347.37 (74.50). There was no significant difference in the mean failure load of roots containing the FRC posts (P = 0.639), but it was significantly greater for steel post samples (P < 0.01). The mean level of fracture among the groups was not significantly different (P = 0.879). No root fractures were ‘favourable’. Significantly more root fractures and fewer core fractures occurred for group A than for groups C or S (P < 0.01).
Conclusion The elastic modulus of an endodontic post does not appear to be a principal factor influencing load at failure or mode of failure of post‐restored teeth.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>21276015</pmid><doi>10.1111/j.1365-2591.2011.01851.x</doi><tpages>11</tpages></addata></record> |
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| subjects | Carbon Composite Resins - chemistry Composite Resins - therapeutic use Dental Bonding - methods Dental Materials Dental Prosthesis Design Dental Restoration Failure Dental Stress Analysis Dentistry Elastic Modulus endodontic post fibre-reinforced composite fracture Humans Materials Testing Pliability Post and Core Technique - instrumentation root Root Canal Therapy - instrumentation static loading |
| title | The effect of the elastic modulus of endodontic posts on static load failure |
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