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Nano-indentation testing of new and fractured nickel-titanium endodontic instruments
Jamleh A, Sadr A, Nomura N, Yahata Y, Ebihara A, Hanawa T, Tagami J, Suda H. Nano‐indentation testing of new and fractured nickel‐titanium endodontic instruments. International Endodontic Journal, 45, 462–468, 2012. Aim To investigate the effect of cyclic fatigue on nickel‐titanium (NiTi) endodonti...
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| Published in: | International endodontic journal 2012-05, Vol.45 (5), p.462-468 |
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| container_end_page | 468 |
| container_issue | 5 |
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| container_title | International endodontic journal |
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| creator | Jamleh, A. Sadr, A. Nomura, N. Yahata, Y. Ebihara, A. Hanawa, T. Tagami, J. Suda, H. |
| description | Jamleh A, Sadr A, Nomura N, Yahata Y, Ebihara A, Hanawa T, Tagami J, Suda H. Nano‐indentation testing of new and fractured nickel‐titanium endodontic instruments. International Endodontic Journal, 45, 462–468, 2012.
Aim To investigate the effect of cyclic fatigue on nickel‐titanium (NiTi) endodontic instruments using a nano‐indentation test.
Methodology Eight ProFile NiTi rotary instruments (size 30, taper 0.06; Dentsply Maillefer, Ballaigues, Switzerland) were tested using a cyclic fatigue set‐up until fracture. The fractured instruments and eight new NiTi instruments of the same size and taper were used for a nano‐indentation test on the internal surfaces of a NiTi instruments in the region just adjacent to their fractured edge (group I) and in the same region of the new group (group II), and the cutting part beside the shaft for both instruments [group III (fractured) and group IV (new)]. Data were statistically analyzed using one‐way analysis of variance and Games–Howell post hoc test. The alpha‐type error was set at 0.05.
Results Significant differences in terms of hardness and elastic modulus for each group (P |
| doi_str_mv | 10.1111/j.1365-2591.2011.01997.x |
| format | article |
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Aim To investigate the effect of cyclic fatigue on nickel‐titanium (NiTi) endodontic instruments using a nano‐indentation test.
Methodology Eight ProFile NiTi rotary instruments (size 30, taper 0.06; Dentsply Maillefer, Ballaigues, Switzerland) were tested using a cyclic fatigue set‐up until fracture. The fractured instruments and eight new NiTi instruments of the same size and taper were used for a nano‐indentation test on the internal surfaces of a NiTi instruments in the region just adjacent to their fractured edge (group I) and in the same region of the new group (group II), and the cutting part beside the shaft for both instruments [group III (fractured) and group IV (new)]. Data were statistically analyzed using one‐way analysis of variance and Games–Howell post hoc test. The alpha‐type error was set at 0.05.
Results Significant differences in terms of hardness and elastic modulus for each group (P < 0.05) were found, with group I having the lowest mean values followed by group III. Additionally, standard deviations increased remarkably after failure, as represented by groups I and III.
Conclusion The nano‐indentation technique can be applied to determine the performance and the failure mechanism of NiTi instruments. The fatigue process revealed a significant decrease in the hardness and elastic modulus of the NiTi instrument. As indicated by the low hardness, the fatigue process did not result in work hardening but rather work softening.</description><identifier>ISSN: 0143-2885</identifier><identifier>EISSN: 1365-2591</identifier><identifier>DOI: 10.1111/j.1365-2591.2011.01997.x</identifier><identifier>PMID: 22211861</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>cyclic fatigue ; Dental Alloys - chemistry ; Dental Stress Analysis - instrumentation ; Dentistry ; Elastic Modulus ; Equipment Design ; Equipment Failure ; Hardness ; Humans ; Materials Testing ; nano-indentation ; Nanotechnology ; Nickel - chemistry ; nickel-titanium instruments ; Root Canal Preparation - instrumentation ; Rotation ; Stress, Mechanical ; Surface Properties ; Time Factors ; Titanium - chemistry</subject><ispartof>International endodontic journal, 2012-05, Vol.45 (5), p.462-468</ispartof><rights>2011 International Endodontic Journal</rights><rights>2011 International Endodontic Journal.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4737-5a2654f7686fc25e07491d06669ababe1e2998b9c82124f4931c1a0408f59fa53</citedby><cites>FETCH-LOGICAL-c4737-5a2654f7686fc25e07491d06669ababe1e2998b9c82124f4931c1a0408f59fa53</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/22211861$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jamleh, A.</creatorcontrib><creatorcontrib>Sadr, A.</creatorcontrib><creatorcontrib>Nomura, N.</creatorcontrib><creatorcontrib>Yahata, Y.</creatorcontrib><creatorcontrib>Ebihara, A.</creatorcontrib><creatorcontrib>Hanawa, T.</creatorcontrib><creatorcontrib>Tagami, J.</creatorcontrib><creatorcontrib>Suda, H.</creatorcontrib><title>Nano-indentation testing of new and fractured nickel-titanium endodontic instruments</title><title>International endodontic journal</title><addtitle>Int Endod J</addtitle><description>Jamleh A, Sadr A, Nomura N, Yahata Y, Ebihara A, Hanawa T, Tagami J, Suda H. Nano‐indentation testing of new and fractured nickel‐titanium endodontic instruments. International Endodontic Journal, 45, 462–468, 2012.
Aim To investigate the effect of cyclic fatigue on nickel‐titanium (NiTi) endodontic instruments using a nano‐indentation test.
Methodology Eight ProFile NiTi rotary instruments (size 30, taper 0.06; Dentsply Maillefer, Ballaigues, Switzerland) were tested using a cyclic fatigue set‐up until fracture. The fractured instruments and eight new NiTi instruments of the same size and taper were used for a nano‐indentation test on the internal surfaces of a NiTi instruments in the region just adjacent to their fractured edge (group I) and in the same region of the new group (group II), and the cutting part beside the shaft for both instruments [group III (fractured) and group IV (new)]. Data were statistically analyzed using one‐way analysis of variance and Games–Howell post hoc test. The alpha‐type error was set at 0.05.
Results Significant differences in terms of hardness and elastic modulus for each group (P < 0.05) were found, with group I having the lowest mean values followed by group III. Additionally, standard deviations increased remarkably after failure, as represented by groups I and III.
Conclusion The nano‐indentation technique can be applied to determine the performance and the failure mechanism of NiTi instruments. The fatigue process revealed a significant decrease in the hardness and elastic modulus of the NiTi instrument. As indicated by the low hardness, the fatigue process did not result in work hardening but rather work softening.</description><subject>cyclic fatigue</subject><subject>Dental Alloys - chemistry</subject><subject>Dental Stress Analysis - instrumentation</subject><subject>Dentistry</subject><subject>Elastic Modulus</subject><subject>Equipment Design</subject><subject>Equipment Failure</subject><subject>Hardness</subject><subject>Humans</subject><subject>Materials Testing</subject><subject>nano-indentation</subject><subject>Nanotechnology</subject><subject>Nickel - chemistry</subject><subject>nickel-titanium instruments</subject><subject>Root Canal Preparation - instrumentation</subject><subject>Rotation</subject><subject>Stress, Mechanical</subject><subject>Surface Properties</subject><subject>Time Factors</subject><subject>Titanium - chemistry</subject><issn>0143-2885</issn><issn>1365-2591</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkEFvFCEYhonR2LX6FwxHLzPyMQMDBw_adNtua73UeCQsA4btDFOBSbf_Xsatey6Xj-R73hfyIISB1FDO510NDWcVZRJqSgBqAlJ29f4VWh0Xr9GKQNtUVAh2gt6ltCOEMNLAW3RCKQUQHFbo7laHqfKhtyHr7KeAs03Zh994cjjYR6xDj13UJs_R9jh4c2-HKvusg59HbEM_9VPI3mAfUo7zWHrSe_TG6SHZD8_zFP1cn9-dXVY3Py6uzr7eVKbtmq5imnLWuo4L7gxllnSthJ5wzqXe6q0FS6UUW2kEBdq6VjZgQJOWCMek06w5RZ8OvQ9x-jOXf6vRJ2OHQQc7zUkBgUaCEEIWVBxQE6eUonXqIfpRx6cCqcWp2qlFnVrUqcWp-udU7Uv04_Mr83a0_TH4X2IBvhyARz_YpxcXq6vzzXIr-eqQ9ynb_TGv473ixRNTv24v1LfvG7q-hrXaNH8BxGqUXw</recordid><startdate>201205</startdate><enddate>201205</enddate><creator>Jamleh, A.</creator><creator>Sadr, A.</creator><creator>Nomura, N.</creator><creator>Yahata, Y.</creator><creator>Ebihara, A.</creator><creator>Hanawa, T.</creator><creator>Tagami, J.</creator><creator>Suda, H.</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>201205</creationdate><title>Nano-indentation testing of new and fractured nickel-titanium endodontic instruments</title><author>Jamleh, A. ; Sadr, A. ; Nomura, N. ; Yahata, Y. ; Ebihara, A. ; Hanawa, T. ; Tagami, J. ; Suda, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4737-5a2654f7686fc25e07491d06669ababe1e2998b9c82124f4931c1a0408f59fa53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>cyclic fatigue</topic><topic>Dental Alloys - chemistry</topic><topic>Dental Stress Analysis - instrumentation</topic><topic>Dentistry</topic><topic>Elastic Modulus</topic><topic>Equipment Design</topic><topic>Equipment Failure</topic><topic>Hardness</topic><topic>Humans</topic><topic>Materials Testing</topic><topic>nano-indentation</topic><topic>Nanotechnology</topic><topic>Nickel - chemistry</topic><topic>nickel-titanium instruments</topic><topic>Root Canal Preparation - instrumentation</topic><topic>Rotation</topic><topic>Stress, Mechanical</topic><topic>Surface Properties</topic><topic>Time Factors</topic><topic>Titanium - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jamleh, A.</creatorcontrib><creatorcontrib>Sadr, A.</creatorcontrib><creatorcontrib>Nomura, N.</creatorcontrib><creatorcontrib>Yahata, Y.</creatorcontrib><creatorcontrib>Ebihara, A.</creatorcontrib><creatorcontrib>Hanawa, T.</creatorcontrib><creatorcontrib>Tagami, J.</creatorcontrib><creatorcontrib>Suda, H.</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>Jamleh, A.</au><au>Sadr, A.</au><au>Nomura, N.</au><au>Yahata, Y.</au><au>Ebihara, A.</au><au>Hanawa, T.</au><au>Tagami, J.</au><au>Suda, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nano-indentation testing of new and fractured nickel-titanium endodontic instruments</atitle><jtitle>International endodontic journal</jtitle><addtitle>Int Endod J</addtitle><date>2012-05</date><risdate>2012</risdate><volume>45</volume><issue>5</issue><spage>462</spage><epage>468</epage><pages>462-468</pages><issn>0143-2885</issn><eissn>1365-2591</eissn><abstract>Jamleh A, Sadr A, Nomura N, Yahata Y, Ebihara A, Hanawa T, Tagami J, Suda H. Nano‐indentation testing of new and fractured nickel‐titanium endodontic instruments. International Endodontic Journal, 45, 462–468, 2012.
Aim To investigate the effect of cyclic fatigue on nickel‐titanium (NiTi) endodontic instruments using a nano‐indentation test.
Methodology Eight ProFile NiTi rotary instruments (size 30, taper 0.06; Dentsply Maillefer, Ballaigues, Switzerland) were tested using a cyclic fatigue set‐up until fracture. The fractured instruments and eight new NiTi instruments of the same size and taper were used for a nano‐indentation test on the internal surfaces of a NiTi instruments in the region just adjacent to their fractured edge (group I) and in the same region of the new group (group II), and the cutting part beside the shaft for both instruments [group III (fractured) and group IV (new)]. Data were statistically analyzed using one‐way analysis of variance and Games–Howell post hoc test. The alpha‐type error was set at 0.05.
Results Significant differences in terms of hardness and elastic modulus for each group (P < 0.05) were found, with group I having the lowest mean values followed by group III. Additionally, standard deviations increased remarkably after failure, as represented by groups I and III.
Conclusion The nano‐indentation technique can be applied to determine the performance and the failure mechanism of NiTi instruments. The fatigue process revealed a significant decrease in the hardness and elastic modulus of the NiTi instrument. As indicated by the low hardness, the fatigue process did not result in work hardening but rather work softening.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>22211861</pmid><doi>10.1111/j.1365-2591.2011.01997.x</doi><tpages>7</tpages></addata></record> |
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| ispartof | International endodontic journal, 2012-05, Vol.45 (5), p.462-468 |
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| subjects | cyclic fatigue Dental Alloys - chemistry Dental Stress Analysis - instrumentation Dentistry Elastic Modulus Equipment Design Equipment Failure Hardness Humans Materials Testing nano-indentation Nanotechnology Nickel - chemistry nickel-titanium instruments Root Canal Preparation - instrumentation Rotation Stress, Mechanical Surface Properties Time Factors Titanium - chemistry |
| title | Nano-indentation testing of new and fractured nickel-titanium endodontic instruments |
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