Cyclic Fatigue of Three Types of Rotary Nickel-Titanium Files in a Dynamic Model
The cyclic fatigue resistance of three types of nickel-titanium rotary files was compared in a model using reciprocating axial movement. The influence of file size and taper was also investigated and fracture patterns were examined under SEM. The 10 experimental groups consisted of ProFiles, K3s, an...
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| Veröffentlicht in: | Journal of endodontics 2006, Vol.32 (1), p.55-57 |
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| creator | Yao, James H. Schwartz, Scott A. Beeson, Thomas J. |
| description | The cyclic fatigue resistance of three types of nickel-titanium rotary files was compared in a model using reciprocating axial movement. The influence of file size and taper was also investigated and fracture patterns were examined under SEM. The 10 experimental groups consisted of ProFiles, K3s, and RaCe files, size 25 in .04 and .06 tapers, as well as ProFiles and K3s, size 40 in .04 and .06 tapers. Each file was rotated freely at 300 rpm inside a stainless steel tube with a 60 degree and 5 mm radius of curvature. A continuous 3 mm oscillating axial motion was applied at 1 cycle per second by attaching an electric dental handpiece to the most inferior load cell of an Instron machine using a custom-made jig. The number of rotations to failure was determined and analyzed using analysis of variance and Tukey′s post hoc tests. Overall, K3 25/.04 files were significantly more resistant to cyclic fatigue compared to any other group in this study. In the 25/.04 category, K3s were significantly more resistant to failure than ProFiles and RaCe files. Also in the same category, ProFiles significantly outlasted RaCe files. In the 25/.06 group, K3s and ProFiles were significantly more resistant to failure than RaCe files, but K3s were not significantly different than ProFiles. In the 40/.04 and 40/.06 groups, K3s were significantly more resistant to cyclic fatigue than ProFiles. SEM observations demonstrated mostly a ductile mode of fracture. The results suggest that different cross-sectional designs, diameters, and tapers all contribute to a nickel-titanium instrument′s vulnerability to cyclic failure. |
| doi_str_mv | 10.1016/j.joen.2005.10.013 |
| format | Article |
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The influence of file size and taper was also investigated and fracture patterns were examined under SEM. The 10 experimental groups consisted of ProFiles, K3s, and RaCe files, size 25 in .04 and .06 tapers, as well as ProFiles and K3s, size 40 in .04 and .06 tapers. Each file was rotated freely at 300 rpm inside a stainless steel tube with a 60 degree and 5 mm radius of curvature. A continuous 3 mm oscillating axial motion was applied at 1 cycle per second by attaching an electric dental handpiece to the most inferior load cell of an Instron machine using a custom-made jig. The number of rotations to failure was determined and analyzed using analysis of variance and Tukey′s post hoc tests. Overall, K3 25/.04 files were significantly more resistant to cyclic fatigue compared to any other group in this study. In the 25/.04 category, K3s were significantly more resistant to failure than ProFiles and RaCe files. Also in the same category, ProFiles significantly outlasted RaCe files. In the 25/.06 group, K3s and ProFiles were significantly more resistant to failure than RaCe files, but K3s were not significantly different than ProFiles. In the 40/.04 and 40/.06 groups, K3s were significantly more resistant to cyclic fatigue than ProFiles. SEM observations demonstrated mostly a ductile mode of fracture. The results suggest that different cross-sectional designs, diameters, and tapers all contribute to a nickel-titanium instrument′s vulnerability to cyclic failure.</description><identifier>ISSN: 0099-2399</identifier><identifier>EISSN: 1878-3554</identifier><identifier>DOI: 10.1016/j.joen.2005.10.013</identifier><identifier>PMID: 16410070</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Analysis of Variance ; Dental Alloys ; Dental Instruments ; Dental Models ; Dental Stress Analysis ; Dentistry ; Equipment Design ; Equipment Failure ; Microscopy, Electron, Scanning ; Nickel ; Root Canal Preparation - instrumentation ; Statistics, Nonparametric ; Titanium</subject><ispartof>Journal of endodontics, 2006, Vol.32 (1), p.55-57</ispartof><rights>2006 American Association of Endodontists</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c420t-ca8dc02c44379ca2f85b443b441ba178b17e00d4ea25c8f57cf0e0ad866853983</citedby><cites>FETCH-LOGICAL-c420t-ca8dc02c44379ca2f85b443b441ba178b17e00d4ea25c8f57cf0e0ad866853983</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.joen.2005.10.013$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,4024,27923,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16410070$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Yao, James H.</creatorcontrib><creatorcontrib>Schwartz, Scott A.</creatorcontrib><creatorcontrib>Beeson, Thomas J.</creatorcontrib><title>Cyclic Fatigue of Three Types of Rotary Nickel-Titanium Files in a Dynamic Model</title><title>Journal of endodontics</title><addtitle>J Endod</addtitle><description>The cyclic fatigue resistance of three types of nickel-titanium rotary files was compared in a model using reciprocating axial movement. The influence of file size and taper was also investigated and fracture patterns were examined under SEM. The 10 experimental groups consisted of ProFiles, K3s, and RaCe files, size 25 in .04 and .06 tapers, as well as ProFiles and K3s, size 40 in .04 and .06 tapers. Each file was rotated freely at 300 rpm inside a stainless steel tube with a 60 degree and 5 mm radius of curvature. A continuous 3 mm oscillating axial motion was applied at 1 cycle per second by attaching an electric dental handpiece to the most inferior load cell of an Instron machine using a custom-made jig. The number of rotations to failure was determined and analyzed using analysis of variance and Tukey′s post hoc tests. Overall, K3 25/.04 files were significantly more resistant to cyclic fatigue compared to any other group in this study. In the 25/.04 category, K3s were significantly more resistant to failure than ProFiles and RaCe files. Also in the same category, ProFiles significantly outlasted RaCe files. In the 25/.06 group, K3s and ProFiles were significantly more resistant to failure than RaCe files, but K3s were not significantly different than ProFiles. In the 40/.04 and 40/.06 groups, K3s were significantly more resistant to cyclic fatigue than ProFiles. SEM observations demonstrated mostly a ductile mode of fracture. The results suggest that different cross-sectional designs, diameters, and tapers all contribute to a nickel-titanium instrument′s vulnerability to cyclic failure.</description><subject>Analysis of Variance</subject><subject>Dental Alloys</subject><subject>Dental Instruments</subject><subject>Dental Models</subject><subject>Dental Stress Analysis</subject><subject>Dentistry</subject><subject>Equipment Design</subject><subject>Equipment Failure</subject><subject>Microscopy, Electron, Scanning</subject><subject>Nickel</subject><subject>Root Canal Preparation - instrumentation</subject><subject>Statistics, Nonparametric</subject><subject>Titanium</subject><issn>0099-2399</issn><issn>1878-3554</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kE1LxDAQhoMo7rr6BzxIT95aJ03bpOBFVleF9QOp55CmU83aj7Vphf57U3bBm4dhvt55YR5CzikEFGhytQk2LTZBCBC7QQCUHZA5FVz4LI6jQzIHSFM_ZGk6IyfWbgAoZ4wfkxlNIgrAYU5el6OujPZWqjcfA3pt6WWfHaKXjVu0U_vW9qobvWejv7DyM9Orxgy1tzKV25vGU97t2KjaeTy1BVan5KhUlcWzfV6Q99Vdtnzw1y_3j8ubta-jEHpfK1FoCHUUMZ5qFZYizl3tguaKcpFTjgBFhCqMtShjrktAUIVIEhGzVLAFudz5brv2e0Dby9pYjVWlGmwHKzkknPEEnDDcCXXXWtthKbedqd1LkoKcOMqNnDjKieM0cxzd0cXefchrLP5O9uCc4HonQPfjj8FOWm2w0ViYDnUvi9b85_8LssWCqg</recordid><startdate>2006</startdate><enddate>2006</enddate><creator>Yao, James H.</creator><creator>Schwartz, Scott A.</creator><creator>Beeson, Thomas J.</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></search><sort><creationdate>2006</creationdate><title>Cyclic Fatigue of Three Types of Rotary Nickel-Titanium Files in a Dynamic Model</title><author>Yao, James H. ; Schwartz, Scott A. ; Beeson, Thomas J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c420t-ca8dc02c44379ca2f85b443b441ba178b17e00d4ea25c8f57cf0e0ad866853983</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Analysis of Variance</topic><topic>Dental Alloys</topic><topic>Dental Instruments</topic><topic>Dental Models</topic><topic>Dental Stress Analysis</topic><topic>Dentistry</topic><topic>Equipment Design</topic><topic>Equipment Failure</topic><topic>Microscopy, Electron, Scanning</topic><topic>Nickel</topic><topic>Root Canal Preparation - instrumentation</topic><topic>Statistics, Nonparametric</topic><topic>Titanium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yao, James H.</creatorcontrib><creatorcontrib>Schwartz, Scott A.</creatorcontrib><creatorcontrib>Beeson, Thomas J.</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>Yao, James H.</au><au>Schwartz, Scott A.</au><au>Beeson, Thomas J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cyclic Fatigue of Three Types of Rotary Nickel-Titanium Files in a Dynamic Model</atitle><jtitle>Journal of endodontics</jtitle><addtitle>J Endod</addtitle><date>2006</date><risdate>2006</risdate><volume>32</volume><issue>1</issue><spage>55</spage><epage>57</epage><pages>55-57</pages><issn>0099-2399</issn><eissn>1878-3554</eissn><abstract>The cyclic fatigue resistance of three types of nickel-titanium rotary files was compared in a model using reciprocating axial movement. The influence of file size and taper was also investigated and fracture patterns were examined under SEM. The 10 experimental groups consisted of ProFiles, K3s, and RaCe files, size 25 in .04 and .06 tapers, as well as ProFiles and K3s, size 40 in .04 and .06 tapers. Each file was rotated freely at 300 rpm inside a stainless steel tube with a 60 degree and 5 mm radius of curvature. A continuous 3 mm oscillating axial motion was applied at 1 cycle per second by attaching an electric dental handpiece to the most inferior load cell of an Instron machine using a custom-made jig. The number of rotations to failure was determined and analyzed using analysis of variance and Tukey′s post hoc tests. Overall, K3 25/.04 files were significantly more resistant to cyclic fatigue compared to any other group in this study. In the 25/.04 category, K3s were significantly more resistant to failure than ProFiles and RaCe files. Also in the same category, ProFiles significantly outlasted RaCe files. In the 25/.06 group, K3s and ProFiles were significantly more resistant to failure than RaCe files, but K3s were not significantly different than ProFiles. In the 40/.04 and 40/.06 groups, K3s were significantly more resistant to cyclic fatigue than ProFiles. SEM observations demonstrated mostly a ductile mode of fracture. The results suggest that different cross-sectional designs, diameters, and tapers all contribute to a nickel-titanium instrument′s vulnerability to cyclic failure.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>16410070</pmid><doi>10.1016/j.joen.2005.10.013</doi><tpages>3</tpages></addata></record> |
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| language | eng |
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| source | MEDLINE; Access via ScienceDirect (Elsevier) |
| subjects | Analysis of Variance Dental Alloys Dental Instruments Dental Models Dental Stress Analysis Dentistry Equipment Design Equipment Failure Microscopy, Electron, Scanning Nickel Root Canal Preparation - instrumentation Statistics, Nonparametric Titanium |
| title | Cyclic Fatigue of Three Types of Rotary Nickel-Titanium Files in a Dynamic Model |
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