Multimethod analysis of three rotary instruments produced by electric discharge machining technology
Aim This study aimed to compare three rotary instruments produced by the EDM process with the heat‐treated ProTaper Gold system regarding design, metallurgy, mechanical properties and shaping ability. Methodology HyFlex EDM (25/~), Neoniti (25/.06), EDMax (25/.06) and ProTaper Gold (25/.08v) instrum...
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| Veröffentlicht in: | International endodontic journal 2023-06, Vol.56 (6), p.775-785 |
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| creator | Silva, Emmanuel J. N. L. Ajuz, Natasha C. Martins, Jorge N. R. Antunes, Bernardo R. Lima, Carolina O. Vieira, Victor T. L. Braz‐Fernandes, Francisco Manuel Versiani, Marco A. |
| description | Aim
This study aimed to compare three rotary instruments produced by the EDM process with the heat‐treated ProTaper Gold system regarding design, metallurgy, mechanical properties and shaping ability.
Methodology
HyFlex EDM (25/~), Neoniti (25/.06), EDMax (25/.06) and ProTaper Gold (25/.08v) instruments (n = 58 per group) were compared regarding design, metallurgy and mechanical performance. Unprepared canal areas were calculated for each system after preparation of mesiobuccal, mesiolingual and distal canals of mandibular molars (15 canals per group) using micro‐CT technology. Statistical analyses were performed using One‐way anova post‐hoc Tukey and Kruskal–Wallis post‐hoc Dunn's tests (α = 5%).
Results
All instruments had asymmetrical blades, no radial lands, no major defects and almost equiatomic nickel/titanium ratios, but different cross‐section designs, tip geometries and surface appearances. Although instruments had distinct transformation temperature curves, they showed crystallographic martensitic arrangement at 21°C and mixed austenite plus R‐phase at body temperature. Neoniti and HyFlex EDM showed similar results in all mechanical tests (p > .05), while EDMax and ProTaper Gold had similar time to fracture (p = .841), maximum bending load (p = .729), and cutting ability (p = .985). ProTaper Gold showed the highest torque to failure (p |
| doi_str_mv | 10.1111/iej.13915 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_2789234651</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2789234651</sourcerecordid><originalsourceid>FETCH-LOGICAL-c3535-3733940ac926912908393e8495e5e600fee117e06954d9c271595854d2d173323</originalsourceid><addsrcrecordid>eNp1kD1PwzAQhi0EglIY-APIEgsMAZ8dJ_GIKj6KilhgjlLn2rhKYrAdofx7DAUGJG65G557dfcQcgLsEmJdGdxcglAgd8gERCYTLhXskgmDVCS8KOQBOfR-wxiTTMA-ORCZSnmaZxNSPw5tMB2Gxta06qt29MZTu6KhcYjU2VC5kZreBzd02AdPX52tB401XY4UW9TBGU1r43VTuTXSrtKN6U2_pgF109vWrscjsreqWo_H331KXm5vnmf3yeLpbj67XiRaSCETkQuhUlZpxTMFXLFCKIFFqiRKzBhbIQLkyDIl01ppnoNUsogzryGucjEl59vceOPbgD6UXbwL27bq0Q6-5HmhuEgzCRE9-4Nu7ODi_5EqgDOWCvikLraUdtZ7h6vy1ZkuGimBlZ_qy6i-_FIf2dPvxGHZYf1L_riOwNUWeDctjv8nlfObh23kBzBhjEc</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2812004311</pqid></control><display><type>article</type><title>Multimethod analysis of three rotary instruments produced by electric discharge machining technology</title><source>MEDLINE</source><source>Wiley Online Library Journals Frontfile Complete</source><creator>Silva, Emmanuel J. N. L. ; Ajuz, Natasha C. ; Martins, Jorge N. R. ; Antunes, Bernardo R. ; Lima, Carolina O. ; Vieira, Victor T. L. ; Braz‐Fernandes, Francisco Manuel ; Versiani, Marco A.</creator><creatorcontrib>Silva, Emmanuel J. N. L. ; Ajuz, Natasha C. ; Martins, Jorge N. R. ; Antunes, Bernardo R. ; Lima, Carolina O. ; Vieira, Victor T. L. ; Braz‐Fernandes, Francisco Manuel ; Versiani, Marco A.</creatorcontrib><description>Aim
This study aimed to compare three rotary instruments produced by the EDM process with the heat‐treated ProTaper Gold system regarding design, metallurgy, mechanical properties and shaping ability.
Methodology
HyFlex EDM (25/~), Neoniti (25/.06), EDMax (25/.06) and ProTaper Gold (25/.08v) instruments (n = 58 per group) were compared regarding design, metallurgy and mechanical performance. Unprepared canal areas were calculated for each system after preparation of mesiobuccal, mesiolingual and distal canals of mandibular molars (15 canals per group) using micro‐CT technology. Statistical analyses were performed using One‐way anova post‐hoc Tukey and Kruskal–Wallis post‐hoc Dunn's tests (α = 5%).
Results
All instruments had asymmetrical blades, no radial lands, no major defects and almost equiatomic nickel/titanium ratios, but different cross‐section designs, tip geometries and surface appearances. Although instruments had distinct transformation temperature curves, they showed crystallographic martensitic arrangement at 21°C and mixed austenite plus R‐phase at body temperature. Neoniti and HyFlex EDM showed similar results in all mechanical tests (p > .05), while EDMax and ProTaper Gold had similar time to fracture (p = .841), maximum bending load (p = .729), and cutting ability (p = .985). ProTaper Gold showed the highest torque to failure (p < .001) and HyFlex EDM had the lowest buckling resistance (p < .001). Mean percentages of unprepared canal areas ranged from 20.4% to 25.7% in the mesial canals, and from 20.8% to 26.2% in the distal canal, with no statistical differences among systems (p > .05).
Conclusions
Instruments' geometry and phase transformation temperatures influenced the results of the mechanical tests, but not their shaping ability.</description><identifier>ISSN: 0143-2885</identifier><identifier>EISSN: 1365-2591</identifier><identifier>DOI: 10.1111/iej.13915</identifier><identifier>PMID: 36942476</identifier><language>eng</language><publisher>England: Wiley Subscription Services, Inc</publisher><subject>Body temperature ; Dental Alloys - chemistry ; Dental Instruments ; differential scanning calorimetry ; endodontics ; Equipment Design ; Humans ; Kruskal-Wallis test ; Materials Testing ; Mechanical properties ; Metallurgy ; micro‐CT ; Molars ; nickel–titanium alloy ; Root Canal Preparation ; Root canals ; scanning electron microscopy ; Statistical analysis ; Statistics ; Temperature ; Titanium - chemistry ; Torque</subject><ispartof>International endodontic journal, 2023-06, Vol.56 (6), p.775-785</ispartof><rights>2023 British Endodontic Society. Published by John Wiley & Sons Ltd</rights><rights>2023 British Endodontic Society. Published by John Wiley & Sons Ltd.</rights><rights>Copyright © 2023 International Endodontic Journal. Published by John Wiley & Sons Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3535-3733940ac926912908393e8495e5e600fee117e06954d9c271595854d2d173323</citedby><cites>FETCH-LOGICAL-c3535-3733940ac926912908393e8495e5e600fee117e06954d9c271595854d2d173323</cites><orcidid>0000-0002-6445-8243 ; 0000-0003-2132-4373 ; 0000-0001-5277-9827 ; 0000-0002-6932-2038</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fiej.13915$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fiej.13915$$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/36942476$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Silva, Emmanuel J. N. L.</creatorcontrib><creatorcontrib>Ajuz, Natasha C.</creatorcontrib><creatorcontrib>Martins, Jorge N. R.</creatorcontrib><creatorcontrib>Antunes, Bernardo R.</creatorcontrib><creatorcontrib>Lima, Carolina O.</creatorcontrib><creatorcontrib>Vieira, Victor T. L.</creatorcontrib><creatorcontrib>Braz‐Fernandes, Francisco Manuel</creatorcontrib><creatorcontrib>Versiani, Marco A.</creatorcontrib><title>Multimethod analysis of three rotary instruments produced by electric discharge machining technology</title><title>International endodontic journal</title><addtitle>Int Endod J</addtitle><description>Aim
This study aimed to compare three rotary instruments produced by the EDM process with the heat‐treated ProTaper Gold system regarding design, metallurgy, mechanical properties and shaping ability.
Methodology
HyFlex EDM (25/~), Neoniti (25/.06), EDMax (25/.06) and ProTaper Gold (25/.08v) instruments (n = 58 per group) were compared regarding design, metallurgy and mechanical performance. Unprepared canal areas were calculated for each system after preparation of mesiobuccal, mesiolingual and distal canals of mandibular molars (15 canals per group) using micro‐CT technology. Statistical analyses were performed using One‐way anova post‐hoc Tukey and Kruskal–Wallis post‐hoc Dunn's tests (α = 5%).
Results
All instruments had asymmetrical blades, no radial lands, no major defects and almost equiatomic nickel/titanium ratios, but different cross‐section designs, tip geometries and surface appearances. Although instruments had distinct transformation temperature curves, they showed crystallographic martensitic arrangement at 21°C and mixed austenite plus R‐phase at body temperature. Neoniti and HyFlex EDM showed similar results in all mechanical tests (p > .05), while EDMax and ProTaper Gold had similar time to fracture (p = .841), maximum bending load (p = .729), and cutting ability (p = .985). ProTaper Gold showed the highest torque to failure (p < .001) and HyFlex EDM had the lowest buckling resistance (p < .001). Mean percentages of unprepared canal areas ranged from 20.4% to 25.7% in the mesial canals, and from 20.8% to 26.2% in the distal canal, with no statistical differences among systems (p > .05).
Conclusions
Instruments' geometry and phase transformation temperatures influenced the results of the mechanical tests, but not their shaping ability.</description><subject>Body temperature</subject><subject>Dental Alloys - chemistry</subject><subject>Dental Instruments</subject><subject>differential scanning calorimetry</subject><subject>endodontics</subject><subject>Equipment Design</subject><subject>Humans</subject><subject>Kruskal-Wallis test</subject><subject>Materials Testing</subject><subject>Mechanical properties</subject><subject>Metallurgy</subject><subject>micro‐CT</subject><subject>Molars</subject><subject>nickel–titanium alloy</subject><subject>Root Canal Preparation</subject><subject>Root canals</subject><subject>scanning electron microscopy</subject><subject>Statistical analysis</subject><subject>Statistics</subject><subject>Temperature</subject><subject>Titanium - chemistry</subject><subject>Torque</subject><issn>0143-2885</issn><issn>1365-2591</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kD1PwzAQhi0EglIY-APIEgsMAZ8dJ_GIKj6KilhgjlLn2rhKYrAdofx7DAUGJG65G557dfcQcgLsEmJdGdxcglAgd8gERCYTLhXskgmDVCS8KOQBOfR-wxiTTMA-ORCZSnmaZxNSPw5tMB2Gxta06qt29MZTu6KhcYjU2VC5kZreBzd02AdPX52tB401XY4UW9TBGU1r43VTuTXSrtKN6U2_pgF109vWrscjsreqWo_H331KXm5vnmf3yeLpbj67XiRaSCETkQuhUlZpxTMFXLFCKIFFqiRKzBhbIQLkyDIl01ppnoNUsogzryGucjEl59vceOPbgD6UXbwL27bq0Q6-5HmhuEgzCRE9-4Nu7ODi_5EqgDOWCvikLraUdtZ7h6vy1ZkuGimBlZ_qy6i-_FIf2dPvxGHZYf1L_riOwNUWeDctjv8nlfObh23kBzBhjEc</recordid><startdate>202306</startdate><enddate>202306</enddate><creator>Silva, Emmanuel J. N. L.</creator><creator>Ajuz, Natasha C.</creator><creator>Martins, Jorge N. R.</creator><creator>Antunes, Bernardo R.</creator><creator>Lima, Carolina O.</creator><creator>Vieira, Victor T. L.</creator><creator>Braz‐Fernandes, Francisco Manuel</creator><creator>Versiani, Marco A.</creator><general>Wiley Subscription Services, 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>7QP</scope><scope>K9.</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-6445-8243</orcidid><orcidid>https://orcid.org/0000-0003-2132-4373</orcidid><orcidid>https://orcid.org/0000-0001-5277-9827</orcidid><orcidid>https://orcid.org/0000-0002-6932-2038</orcidid></search><sort><creationdate>202306</creationdate><title>Multimethod analysis of three rotary instruments produced by electric discharge machining technology</title><author>Silva, Emmanuel J. N. L. ; Ajuz, Natasha C. ; Martins, Jorge N. R. ; Antunes, Bernardo R. ; Lima, Carolina O. ; Vieira, Victor T. L. ; Braz‐Fernandes, Francisco Manuel ; Versiani, Marco A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3535-3733940ac926912908393e8495e5e600fee117e06954d9c271595854d2d173323</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Body temperature</topic><topic>Dental Alloys - chemistry</topic><topic>Dental Instruments</topic><topic>differential scanning calorimetry</topic><topic>endodontics</topic><topic>Equipment Design</topic><topic>Humans</topic><topic>Kruskal-Wallis test</topic><topic>Materials Testing</topic><topic>Mechanical properties</topic><topic>Metallurgy</topic><topic>micro‐CT</topic><topic>Molars</topic><topic>nickel–titanium alloy</topic><topic>Root Canal Preparation</topic><topic>Root canals</topic><topic>scanning electron microscopy</topic><topic>Statistical analysis</topic><topic>Statistics</topic><topic>Temperature</topic><topic>Titanium - chemistry</topic><topic>Torque</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Silva, Emmanuel J. N. L.</creatorcontrib><creatorcontrib>Ajuz, Natasha C.</creatorcontrib><creatorcontrib>Martins, Jorge N. R.</creatorcontrib><creatorcontrib>Antunes, Bernardo R.</creatorcontrib><creatorcontrib>Lima, Carolina O.</creatorcontrib><creatorcontrib>Vieira, Victor T. L.</creatorcontrib><creatorcontrib>Braz‐Fernandes, Francisco Manuel</creatorcontrib><creatorcontrib>Versiani, Marco A.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><jtitle>International endodontic journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Silva, Emmanuel J. N. L.</au><au>Ajuz, Natasha C.</au><au>Martins, Jorge N. R.</au><au>Antunes, Bernardo R.</au><au>Lima, Carolina O.</au><au>Vieira, Victor T. L.</au><au>Braz‐Fernandes, Francisco Manuel</au><au>Versiani, Marco A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Multimethod analysis of three rotary instruments produced by electric discharge machining technology</atitle><jtitle>International endodontic journal</jtitle><addtitle>Int Endod J</addtitle><date>2023-06</date><risdate>2023</risdate><volume>56</volume><issue>6</issue><spage>775</spage><epage>785</epage><pages>775-785</pages><issn>0143-2885</issn><eissn>1365-2591</eissn><abstract>Aim
This study aimed to compare three rotary instruments produced by the EDM process with the heat‐treated ProTaper Gold system regarding design, metallurgy, mechanical properties and shaping ability.
Methodology
HyFlex EDM (25/~), Neoniti (25/.06), EDMax (25/.06) and ProTaper Gold (25/.08v) instruments (n = 58 per group) were compared regarding design, metallurgy and mechanical performance. Unprepared canal areas were calculated for each system after preparation of mesiobuccal, mesiolingual and distal canals of mandibular molars (15 canals per group) using micro‐CT technology. Statistical analyses were performed using One‐way anova post‐hoc Tukey and Kruskal–Wallis post‐hoc Dunn's tests (α = 5%).
Results
All instruments had asymmetrical blades, no radial lands, no major defects and almost equiatomic nickel/titanium ratios, but different cross‐section designs, tip geometries and surface appearances. Although instruments had distinct transformation temperature curves, they showed crystallographic martensitic arrangement at 21°C and mixed austenite plus R‐phase at body temperature. Neoniti and HyFlex EDM showed similar results in all mechanical tests (p > .05), while EDMax and ProTaper Gold had similar time to fracture (p = .841), maximum bending load (p = .729), and cutting ability (p = .985). ProTaper Gold showed the highest torque to failure (p < .001) and HyFlex EDM had the lowest buckling resistance (p < .001). Mean percentages of unprepared canal areas ranged from 20.4% to 25.7% in the mesial canals, and from 20.8% to 26.2% in the distal canal, with no statistical differences among systems (p > .05).
Conclusions
Instruments' geometry and phase transformation temperatures influenced the results of the mechanical tests, but not their shaping ability.</abstract><cop>England</cop><pub>Wiley Subscription Services, Inc</pub><pmid>36942476</pmid><doi>10.1111/iej.13915</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-6445-8243</orcidid><orcidid>https://orcid.org/0000-0003-2132-4373</orcidid><orcidid>https://orcid.org/0000-0001-5277-9827</orcidid><orcidid>https://orcid.org/0000-0002-6932-2038</orcidid></addata></record> |
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| ispartof | International endodontic journal, 2023-06, Vol.56 (6), p.775-785 |
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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete |
| subjects | Body temperature Dental Alloys - chemistry Dental Instruments differential scanning calorimetry endodontics Equipment Design Humans Kruskal-Wallis test Materials Testing Mechanical properties Metallurgy micro‐CT Molars nickel–titanium alloy Root Canal Preparation Root canals scanning electron microscopy Statistical analysis Statistics Temperature Titanium - chemistry Torque |
| title | Multimethod analysis of three rotary instruments produced by electric discharge machining technology |
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