Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat Treatments
Coronal preflaring NiTi files should possess proper hardness, resistance to fracture and flexibility. This study compared the bending resistance and cyclic fatigue resistance of three orifice preflaring NiTi files. HyFlex EDM Orifice opener (#25/12), HyFlex CM (#25/08) and One Flare (#25/09) were te...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Online Access: | https://www.mdpi.com/2076-3417/11/16/7694 |
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| author | Soram Oh Su-Young Moon Antonis Chaniotis Eugenio Pedullá Adel Saeed Al-Ghamdi Fawzi Ali Al-Ghamdi Ayman Omar Mandorah Hiran Perinpanayagam Kee-Yeon Kum Ove A. Peters Seok Woo Chang |
| author_facet | Soram Oh Su-Young Moon Antonis Chaniotis Eugenio Pedullá Adel Saeed Al-Ghamdi Fawzi Ali Al-Ghamdi Ayman Omar Mandorah Hiran Perinpanayagam Kee-Yeon Kum Ove A. Peters Seok Woo Chang |
| author_sort | Soram Oh |
| collection | DOAJ |
| description | Coronal preflaring NiTi files should possess proper hardness, resistance to fracture and flexibility. This study compared the bending resistance and cyclic fatigue resistance of three orifice preflaring NiTi files. HyFlex EDM Orifice opener (#25/12), HyFlex CM (#25/08) and One Flare (#25/09) were tested (n = 46/instrument). Bending resistance was assessed with the stress when perpendicular displacement was applied to a 3 mm point from the file tip, and was performed at either room temperature (RT, n = 10) or body temperature (BT, n = 10). Cyclic fatigue resistance was tested with an artificial ceramic root canal at RT (n = 10) and BT (n = 10), and the number of cycles to failure (NCF) was obtained. The bending resistance and the NCF results were analyzed by two-way ANOVA and Tukey’s test. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analyses were performed (n = 3, respectively). HyFlex EDM exhibited the highest bending resistance, followed by One Flare and HyFlex CM (<i>p</i> < 0.05), irrespective of the tested temperature. At RT, HyFlex CM demonstrated the highest NCF (<i>p</i> = 0.001), while HyFlex EDM had the highest NCF at BT (<i>p</i> < 0.001). The tested NiTi files were composed of austenite and martensite according to the DSC and XRD results. HyFlex EDM had the highest bending resistance and NCF measured at BT. |
| first_indexed | 2024-03-10T09:01:34Z |
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| language | English |
| last_indexed | 2024-03-10T09:01:34Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-99624aad09004664a419a5304762064e2023-11-22T06:45:35ZengMDPI AGApplied Sciences2076-34172021-08-011116769410.3390/app11167694Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat TreatmentsSoram Oh0Su-Young Moon1Antonis Chaniotis2Eugenio Pedullá3Adel Saeed Al-Ghamdi4Fawzi Ali Al-Ghamdi5Ayman Omar Mandorah6Hiran Perinpanayagam7Kee-Yeon Kum8Ove A. Peters9Seok Woo Chang10Department of Conservative Dentistry, KyungHee University Dental Hospital, 23 Kyungheedaero, Dongdaemun-gu, Seoul 02447, KoreaKorea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, KoreaPrivate Practice, 140 Eleftheriou Venizelou Str., 17676 Kalithea, GreeceDepartment of General Surgery and Surgical-Medical Specialties, University of Catania, Via Cervignano, 29, 95129 Catania, SC, ItalyKing Abdulaziz Hospital, Jeddah 22421, Saudi ArabiaDirector of Dental Services, Ministry of Health, P.O. Box 109196, Jeddah 21351, Saudi ArabiaDepartment of Restorative and Dental Materials, Faculty of Dentistry, Taif University, Taif 26571, Saudi ArabiaSchulich School of Medicine & Dentistry, University of Western Ontario, 1151 Richmond Street, London, ON N6A3K7, CanadaDepartment of Conservative Dentistry, Dental Research Institute, Seoul National University Dental Hospital, Seoul National University School of Dentistry, 101 Daehak-ro, Jongro-gu, Seoul 03080, KoreaDepartments of Endodontics, University of the Pacific School of Dentistry, San Francisco, CA 94103, USADepartment of Conservative Dentistry, KyungHee University Dental Hospital, 23 Kyungheedaero, Dongdaemun-gu, Seoul 02447, KoreaCoronal preflaring NiTi files should possess proper hardness, resistance to fracture and flexibility. This study compared the bending resistance and cyclic fatigue resistance of three orifice preflaring NiTi files. HyFlex EDM Orifice opener (#25/12), HyFlex CM (#25/08) and One Flare (#25/09) were tested (n = 46/instrument). Bending resistance was assessed with the stress when perpendicular displacement was applied to a 3 mm point from the file tip, and was performed at either room temperature (RT, n = 10) or body temperature (BT, n = 10). Cyclic fatigue resistance was tested with an artificial ceramic root canal at RT (n = 10) and BT (n = 10), and the number of cycles to failure (NCF) was obtained. The bending resistance and the NCF results were analyzed by two-way ANOVA and Tukey’s test. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analyses were performed (n = 3, respectively). HyFlex EDM exhibited the highest bending resistance, followed by One Flare and HyFlex CM (<i>p</i> < 0.05), irrespective of the tested temperature. At RT, HyFlex CM demonstrated the highest NCF (<i>p</i> = 0.001), while HyFlex EDM had the highest NCF at BT (<i>p</i> < 0.001). The tested NiTi files were composed of austenite and martensite according to the DSC and XRD results. HyFlex EDM had the highest bending resistance and NCF measured at BT.https://www.mdpi.com/2076-3417/11/16/7694bending resistancecyclic fatiguedifferential scanning calorimetryorifice openerX-ray diffraction |
| spellingShingle | Soram Oh Su-Young Moon Antonis Chaniotis Eugenio Pedullá Adel Saeed Al-Ghamdi Fawzi Ali Al-Ghamdi Ayman Omar Mandorah Hiran Perinpanayagam Kee-Yeon Kum Ove A. Peters Seok Woo Chang Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat Treatments Applied Sciences bending resistance cyclic fatigue differential scanning calorimetry orifice opener X-ray diffraction |
| title | Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat Treatments |
| title_full | Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat Treatments |
| title_fullStr | Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat Treatments |
| title_full_unstemmed | Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat Treatments |
| title_short | Evaluation of Cyclic Fatigue and Bending Resistance of Coronal Preflaring NiTi File Manufactured with Different Heat Treatments |
| title_sort | evaluation of cyclic fatigue and bending resistance of coronal preflaring niti file manufactured with different heat treatments |
| topic | bending resistance cyclic fatigue differential scanning calorimetry orifice opener X-ray diffraction |
| url | https://www.mdpi.com/2076-3417/11/16/7694 |
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