The Effect of Hydrofluoric Acid Surface Treatment on the Cyclic Fatigue Resistance of K3 NiTi Instruments
Identifieur interne : 000040 ( Pmc/Checkpoint ); précédent : 000039; suivant : 000041The Effect of Hydrofluoric Acid Surface Treatment on the Cyclic Fatigue Resistance of K3 NiTi Instruments
Auteurs : Kee-Yeon Kum [Corée du Sud] ; Seok Woo Chang [Corée du Sud]Source :
- Bioinorganic Chemistry and Applications [ 1565-3633 ] ; 2017.
Abstract
The aim of this study was to investigate the effect of 50% hydrofluoric acid (HF) surface treatment on the cyclic fatigue resistance (CFR) of K3 NiTi instruments. Twenty as-received and twenty HF-treated K3 NiTi instruments were compared in CFR. The surface texture and fracture surface of two instrument groups were examined with a scanning electron microscope (SEM). Additionally, any change of Ni and Ti composition from both instrument groups was investigated using energy dispersive spectrometry. The results were analyzed with
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DOI: 10.1155/2017/3189729
PubMed: 28539854
PubMed Central: 5433420
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">The Effect of Hydrofluoric Acid Surface Treatment on the Cyclic Fatigue Resistance of K3 NiTi Instruments</title><author><name sortKey="Kum, Kee Yeon" sort="Kum, Kee Yeon" uniqKey="Kum K" first="Kee-Yeon" last="Kum">Kee-Yeon Kum</name><affiliation wicri:level="3"><nlm:aff id="I1">Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul Dental Hospital for Disabled, Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea</nlm:aff><country xml:lang="fr">Corée du Sud</country><wicri:regionArea>Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul Dental Hospital for Disabled, Dental Research Institute, Seoul National University School of Dentistry, Seoul</wicri:regionArea><placeName><settlement type="city">Séoul</settlement><region type="capital">Région capitale de Séoul</region></placeName></affiliation></author><author><name sortKey="Chang, Seok Woo" sort="Chang, Seok Woo" uniqKey="Chang S" first="Seok Woo" last="Chang">Seok Woo Chang</name><affiliation wicri:level="3"><nlm:aff id="I2">Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea</nlm:aff><country xml:lang="fr">Corée du Sud</country><wicri:regionArea>Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul</wicri:regionArea><placeName><settlement type="city">Séoul</settlement><region type="capital">Région capitale de Séoul</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">28539854</idno><idno type="pmc">5433420</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5433420</idno><idno type="RBID">PMC:5433420</idno><idno type="doi">10.1155/2017/3189729</idno><date when="2017">2017</date><idno type="wicri:Area/Pmc/Corpus">002873</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002873</idno><idno type="wicri:Area/Pmc/Curation">002873</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">002873</idno><idno type="wicri:Area/Pmc/Checkpoint">000040</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000040</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">The Effect of Hydrofluoric Acid Surface Treatment on the Cyclic Fatigue Resistance of K3 NiTi Instruments</title><author><name sortKey="Kum, Kee Yeon" sort="Kum, Kee Yeon" uniqKey="Kum K" first="Kee-Yeon" last="Kum">Kee-Yeon Kum</name><affiliation wicri:level="3"><nlm:aff id="I1">Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul Dental Hospital for Disabled, Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea</nlm:aff><country xml:lang="fr">Corée du Sud</country><wicri:regionArea>Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul Dental Hospital for Disabled, Dental Research Institute, Seoul National University School of Dentistry, Seoul</wicri:regionArea><placeName><settlement type="city">Séoul</settlement><region type="capital">Région capitale de Séoul</region></placeName></affiliation></author><author><name sortKey="Chang, Seok Woo" sort="Chang, Seok Woo" uniqKey="Chang S" first="Seok Woo" last="Chang">Seok Woo Chang</name><affiliation wicri:level="3"><nlm:aff id="I2">Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea</nlm:aff><country xml:lang="fr">Corée du Sud</country><wicri:regionArea>Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul</wicri:regionArea><placeName><settlement type="city">Séoul</settlement><region type="capital">Région capitale de Séoul</region></placeName></affiliation></author></analytic><series><title level="j">Bioinorganic Chemistry and Applications</title><idno type="ISSN">1565-3633</idno><idno type="eISSN">1687-479X</idno><imprint><date when="2017">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The aim of this study was to investigate the effect of 50% hydrofluoric acid (HF) surface treatment on the cyclic fatigue resistance (CFR) of K3 NiTi instruments. Twenty as-received and twenty HF-treated K3 NiTi instruments were compared in CFR. The surface texture and fracture surface of two instrument groups were examined with a scanning electron microscope (SEM). Additionally, any change of Ni and Ti composition from both instrument groups was investigated using energy dispersive spectrometry. The results were analyzed with <italic>t</italic>-test. The HF-treated K3 group showed statistically higher cyclic fatigue resistance than as-received K3 group (<italic>P</italic> < 0.05). HF-treated K3 instruments showed smoother and rounded surface compared to as-received K3 under SEM observation. The fracture surfaces of both groups showed typical patterns of cyclic fatigue fracture. There was no difference in surface Ni and Ti composition between two groups. HF treatment of K3 instruments smoothed the file surface and increased the cyclic fatigue resistance, while it had no effect on surface ion composition and the file fracture pattern.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Glosson, C R" uniqKey="Glosson C">C. R. Glosson</name></author><author><name sortKey="Haller, R H" uniqKey="Haller R">R. H. Haller</name></author><author><name sortKey="Brent Dove, S" uniqKey="Brent Dove S">S. Brent Dove</name></author><author><name sortKey="Del Rio, C E" uniqKey="Del Rio C">C. E. del Rio</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Park, S Y" uniqKey="Park S">S.-Y. Park</name></author><author><name sortKey="Cheung, G S P" uniqKey="Cheung G">G. S. P. Cheung</name></author><author><name sortKey="Yum, J" uniqKey="Yum J">J. Yum</name></author><author><name sortKey="Hur, B" uniqKey="Hur B">B. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Bioinorg Chem Appl</journal-id><journal-id journal-id-type="iso-abbrev">Bioinorg Chem Appl</journal-id><journal-id journal-id-type="publisher-id">BCA</journal-id><journal-title-group><journal-title>Bioinorganic Chemistry and Applications</journal-title></journal-title-group><issn pub-type="ppub">1565-3633</issn><issn pub-type="epub">1687-479X</issn><publisher><publisher-name>Hindawi</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">28539854</article-id><article-id pub-id-type="pmc">5433420</article-id><article-id pub-id-type="doi">10.1155/2017/3189729</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title>The Effect of Hydrofluoric Acid Surface Treatment on the Cyclic Fatigue Resistance of K3 NiTi Instruments</article-title></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">http://orcid.org/0000-0002-3032-3498</contrib-id><name><surname>Kum</surname><given-names>Kee-Yeon</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">http://orcid.org/0000-0003-4461-3274</contrib-id><name><surname>Chang</surname><given-names>Seok Woo</given-names></name><xref ref-type="aff" rid="I2"><sup>2</sup></xref><xref ref-type="corresp" rid="cor1"><sup>*</sup></xref></contrib></contrib-group><aff id="I1"><sup>1</sup>Department of Conservative Dentistry, Seoul National University Dental Hospital, Seoul Dental Hospital for Disabled, Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea</aff><aff id="I2"><sup>2</sup>Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea</aff><author-notes><corresp id="cor1">*Seok Woo Chang: <email>swc2007smc@gmail.com</email></corresp><fn fn-type="other"><p>Academic Editor: Ian S. Butler</p></fn></author-notes><pub-date pub-type="ppub"><year>2017</year></pub-date><pub-date pub-type="epub"><day>2</day><month>5</month><year>2017</year></pub-date><volume>2017</volume><elocation-id>3189729</elocation-id><history><date date-type="received"><day>19</day><month>10</month><year>2016</year></date><date date-type="rev-recd"><day>19</day><month>3</month><year>2017</year></date><date date-type="accepted"><day>11</day><month>4</month><year>2017</year></date></history><permissions><copyright-statement>Copyright © 2017 Kee-Yeon Kum and Seok Woo Chang.</copyright-statement><copyright-year>2017</copyright-year><license xlink:href="https://creativecommons.org/licenses/by/4.0/"><license-p>This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><p>The aim of this study was to investigate the effect of 50% hydrofluoric acid (HF) surface treatment on the cyclic fatigue resistance (CFR) of K3 NiTi instruments. Twenty as-received and twenty HF-treated K3 NiTi instruments were compared in CFR. The surface texture and fracture surface of two instrument groups were examined with a scanning electron microscope (SEM). Additionally, any change of Ni and Ti composition from both instrument groups was investigated using energy dispersive spectrometry. The results were analyzed with <italic>t</italic>-test. The HF-treated K3 group showed statistically higher cyclic fatigue resistance than as-received K3 group (<italic>P</italic> < 0.05). HF-treated K3 instruments showed smoother and rounded surface compared to as-received K3 under SEM observation. The fracture surfaces of both groups showed typical patterns of cyclic fatigue fracture. There was no difference in surface Ni and Ti composition between two groups. HF treatment of K3 instruments smoothed the file surface and increased the cyclic fatigue resistance, while it had no effect on surface ion composition and the file fracture pattern.</p></abstract></article-meta></front><floats-group><fig id="fig1" orientation="portrait" position="float"><label>Figure 1</label><caption><p>Cyclic fatigue resistance measuring equipment and diagram of an artificial canal. (a) Schematic diagram of artificial canal. (b) Metal blocks constituting artificial canal. (c) Setup of cyclic fatigue resistance measuring equipment. (d) Working NiTi instrument inside the artificial canal during experiment.</p></caption><graphic xlink:href="BCA2017-3189729.001"></graphic></fig><fig id="fig2" orientation="portrait" position="float"><label>Figure 2</label><caption><p>SEM images of the surfaces of as-received and HF-treated K3 instruments. As-received K3 files (a, c) revealed rough surfaces with metal roll-overs and machining marks. On the contrary, the HF-treated K3 (b, d) showed smoothening of rough surfaces. (a) As-received K3 instrument (×200). (b) HF-treated K3 instrument (×200). (c) As-received K3 instrument (×2,500). (d) HF-treated K3 instrument (×10,000). SEM: scanning electron microscope; HF: hydrofluoric acid.</p></caption><graphic xlink:href="BCA2017-3189729.002"></graphic></fig><fig id="fig3" orientation="portrait" position="float"><label>Figure 3</label><caption><p>EDS analysis of as-received K3 instrument (a) and HF-treated K3 instrument (b). As-received and HF-treated K3 instruments showed no difference in ion composition.</p></caption><graphic xlink:href="BCA2017-3189729.003"></graphic></fig><fig id="fig4" orientation="portrait" position="float"><label>Figure 4</label><caption><p>Fracture surface of as-received (a) and HF-treated (b) K3 instruments. Both surfaces revealed characteristic patterns of cyclic fatigue fractures with multiple lines (white arrows in (a, b)) and cone and cup appearance (black arrows in (b)). Pore-like structures were also shown (unfilled white arrow in (b)). The multiple lines pointed to by white arrow show the initiation site for the fatigue fracture process.</p></caption><graphic xlink:href="BCA2017-3189729.004"></graphic></fig><table-wrap id="tab1" orientation="portrait" position="float"><label>Table 1</label><caption><p>The results of fatigue resistance test of HF-treated and as-received K3 instruments.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="1" colspan="1">NCF</th><th align="center" rowspan="1" colspan="1">K3 (<italic>n</italic> = 20)</th></tr></thead><tbody><tr><td align="left" rowspan="1" colspan="1">As-received</td><td align="center" rowspan="1" colspan="1">79825.5 (±14472.35)<sup>a</sup></td></tr><tr><td align="left" rowspan="1" colspan="1">HF-treated</td><td align="center" rowspan="1" colspan="1">90835.5 (±13170.87)<sup>b</sup></td></tr></tbody></table><table-wrap-foot><fn><p>NCF: number of cycles to fracture; HF: hydrofluoric acid. Different alphabetical letter represents statistically significant difference.</p></fn></table-wrap-foot></table-wrap><table-wrap id="tab2" orientation="portrait" position="float"><label>Table 2</label><caption><p>Ni and Ti composition in as-received and HF-treated samples in K3 (atomic%).</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="left" rowspan="1" colspan="1">Weight percent</th><th align="center" rowspan="1" colspan="1">Ni</th><th align="center" rowspan="1" colspan="1">Ti</th></tr></thead><tbody><tr><td align="left" rowspan="1" colspan="1">As-received (<italic>n</italic> = 3)</td><td align="center" rowspan="1" colspan="1">55.07 ± 2.50</td><td align="center" rowspan="1" colspan="1">44.93 ± 2.50</td></tr><tr><td align="left" rowspan="1" colspan="1">HF-treated (<italic>n</italic> = 3)</td><td align="center" rowspan="1" colspan="1">54.14 ± 2.70</td><td align="center" rowspan="1" colspan="1">45.86 ± 2.70</td></tr></tbody></table></table-wrap></floats-group></pmc><affiliations><list><country><li>Corée du Sud</li></country><region><li>Région capitale de Séoul</li></region><settlement><li>Séoul</li></settlement></list><tree><country name="Corée du Sud"><region name="Région capitale de Séoul"><name sortKey="Kum, Kee Yeon" sort="Kum, Kee Yeon" uniqKey="Kum K" first="Kee-Yeon" last="Kum">Kee-Yeon Kum</name></region><name sortKey="Chang, Seok Woo" sort="Chang, Seok Woo" uniqKey="Chang S" first="Seok Woo" last="Chang">Seok Woo Chang</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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