Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment
Objective: This study compared the fatigue behavior of endodontic instruments manufactured with conventional NiTi alloy electropolishing, RaCe (FKG Dentaire, LaChauxdeFonds, Switzerland), with instruments manufactured with NiTi CM Wire subjected to thermomechanical treatment, in the manufacturing...
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| Format: | Article |
| Language: | English |
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Faculdade São Leopoldo Mandic
2018-06-01
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| Series: | RGO: Revista Gaúcha de Odontologia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1981-86372018000200111&lng=en&nrm=iso&tlng=en |
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| author | Inês de Fátima de Azevedo Jacinto INOJOSA Hélio Pereira LOPES Phillip Lucas Ricardo PEREIRA Diogo Lopes do NASCIMENTO Carlos Nelson ELIAS Victor Talarico Leal VIEIRA Marcia Valeria Boussada VIEIRA |
| author_facet | Inês de Fátima de Azevedo Jacinto INOJOSA Hélio Pereira LOPES Phillip Lucas Ricardo PEREIRA Diogo Lopes do NASCIMENTO Carlos Nelson ELIAS Victor Talarico Leal VIEIRA Marcia Valeria Boussada VIEIRA |
| author_sort | Inês de Fátima de Azevedo Jacinto INOJOSA |
| collection | DOAJ |
| description | Objective: This study compared the fatigue behavior of endodontic instruments manufactured with conventional NiTi alloy electropolishing, RaCe (FKG Dentaire, LaChauxdeFonds, Switzerland), with instruments manufactured with NiTi CM Wire subjected to thermomechanical treatment, in the manufacturing process, HyFlex CM (Coltène Whaledent, Cuyahoga Falls, Ohio, USA), both with similar geometry and dimensions in order to determine the influence of the manufacturing process in the fatigue resistance. Methods: The methodoly consisted of twenty HyFlex CM and RaCe instruments with D0 0.25 mm, taper 0.06 mm / mm, 25 mm length, both with triangular cross section. The fracture resistance was evaluated by static fatigue test, using a stainless artificial canal with 5mm of radius (86°), recording the time and calculating the number of cycles until fracture occurs (NCF). For statistical analysis the Student t test was used The fractured instruments surface was analyzed by SEM. Results: The NCF was significantly higher for HyFlex CM instruments in comparison with RaCe files (P˂0.05) being 1336% more resistant to fatigue. The analysis of the fractured surface by SEM showed ductile-kind morphological characteristics for both instruments and the absence of plastic deformation. Conclusion: HyFlex CM instruments present higher values of NCF. Thus, it can be concluded that the thermal treatment to which these instruments with CM Wire alloy are submitted makes them more resistant to fracture than Race instruments manufactured with conventional NiTi alloy electropolishing. |
| first_indexed | 2024-04-12T08:41:59Z |
| format | Article |
| id | doaj.art-a6103404336c499aa1b7a2f1ac20c31b |
| institution | Directory Open Access Journal |
| issn | 0103-6971 1981-8637 |
| language | English |
| last_indexed | 2024-04-12T08:41:59Z |
| publishDate | 2018-06-01 |
| publisher | Faculdade São Leopoldo Mandic |
| record_format | Article |
| series | RGO: Revista Gaúcha de Odontologia |
| spelling | doaj.art-a6103404336c499aa1b7a2f1ac20c31b2022-12-22T03:39:50ZengFaculdade São Leopoldo MandicRGO: Revista Gaúcha de Odontologia0103-69711981-86372018-06-01662111116http://dx.doi.org/10.1590/1981-863720180002000013308Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatmentInês de Fátima de Azevedo Jacinto INOJOSA0Hélio Pereira LOPES1Phillip Lucas Ricardo PEREIRA 2Diogo Lopes do NASCIMENTO 3Carlos Nelson ELIAS 4Victor Talarico Leal VIEIRA5Marcia Valeria Boussada VIEIRA 6Universidade Federal de AlagoasUniversidade Estácio de SáUniversidade Federal de AlagoasUniversidade Federal de AlagoasInstituto Militar de EngenhariaUniversidade do Grande RioFaculdades Unidas do Norte de MinasObjective: This study compared the fatigue behavior of endodontic instruments manufactured with conventional NiTi alloy electropolishing, RaCe (FKG Dentaire, LaChauxdeFonds, Switzerland), with instruments manufactured with NiTi CM Wire subjected to thermomechanical treatment, in the manufacturing process, HyFlex CM (Coltène Whaledent, Cuyahoga Falls, Ohio, USA), both with similar geometry and dimensions in order to determine the influence of the manufacturing process in the fatigue resistance. Methods: The methodoly consisted of twenty HyFlex CM and RaCe instruments with D0 0.25 mm, taper 0.06 mm / mm, 25 mm length, both with triangular cross section. The fracture resistance was evaluated by static fatigue test, using a stainless artificial canal with 5mm of radius (86°), recording the time and calculating the number of cycles until fracture occurs (NCF). For statistical analysis the Student t test was used The fractured instruments surface was analyzed by SEM. Results: The NCF was significantly higher for HyFlex CM instruments in comparison with RaCe files (P˂0.05) being 1336% more resistant to fatigue. The analysis of the fractured surface by SEM showed ductile-kind morphological characteristics for both instruments and the absence of plastic deformation. Conclusion: HyFlex CM instruments present higher values of NCF. Thus, it can be concluded that the thermal treatment to which these instruments with CM Wire alloy are submitted makes them more resistant to fracture than Race instruments manufactured with conventional NiTi alloy electropolishing.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1981-86372018000200111&lng=en&nrm=iso&tlng=enEndodontics; Nickel; Titanium |
| spellingShingle | Inês de Fátima de Azevedo Jacinto INOJOSA Hélio Pereira LOPES Phillip Lucas Ricardo PEREIRA Diogo Lopes do NASCIMENTO Carlos Nelson ELIAS Victor Talarico Leal VIEIRA Marcia Valeria Boussada VIEIRA Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment RGO: Revista Gaúcha de Odontologia Endodontics; Nickel; Titanium |
| title | Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment |
| title_full | Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment |
| title_fullStr | Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment |
| title_full_unstemmed | Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment |
| title_short | Fatigue resistance of endodontic instruments manufactured in NiTi CM Wire and in conventional NiTi alloy with eletrochemical treatment |
| title_sort | fatigue resistance of endodontic instruments manufactured in niti cm wire and in conventional niti alloy with eletrochemical treatment |
| topic | Endodontics; Nickel; Titanium |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1981-86372018000200111&lng=en&nrm=iso&tlng=en |
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