Metallurgic behavior and mechanical property of nickel-titanium endodontic files made by 3 heat treatment techniques
- Author:
- No author available
- Journal Title:
- Chinese Journal of Stomatology
- Issue:
- 8
- DOI:
- 10.3760/cma.j.issn.1002-0098.2018.08.008
- Key Word:
- 根管制备;相变;镍钛根管锉;弯曲性能;疲劳折断性能;Root canal preparation;Phase transition;Nickel-titanium file;Bending property;Cyclic fatigue
Abstract： Objective To compare the phase transformation behavior,bending property and cyclic fatigue resistance of CM-wire,R-phase and M-wire nickel-titanium endodontic files treated by 3 heat treatment techniques.Methods Hyflex CM (25 mm,25#/0.06) made from CM wire,TF (25 mm,25#/0.06) made from R-phase heat treatment,ProTaper Next X2 (25 mm,tip size 25#/0.06) made from M-wire,Mtwo (25 mm,25#/0.06) and ProTaper F2 (25 mm,tip size 25#/0.08) made from conventional nickel-titanium wire were chosen.Five of each files were chosen for differential scanning calorimetric (DSC) evaluation (n=5).The specimens were prepared from adjacent portions of the shaft.The weight and length were typically (20± 1) mg and 2-3 mm.Another eight of the 5 nickel-titanium files were undergone cantilever-bending test,respectively (n=8).Further ten of the 5 instruments were submitted to the cyclic fatigue test by using a simulated metal root canal (n=10).The data of Ms,Mf,As,Af,△H,bending load,number of cyclic fatigue (NCF),fragment length were analyzed using one-way analysis of variance at a significance level of P＜0.05.Results The Af of Hyflex CM [(60.27±0.94) ℃] and ProTaper Next [(51.40±0.32) ℃] were higher than body temperature of 37 ℃.The bending load values at 3.0 mm deflection of Hyflex CM [(0.867±0.074) N],TF [(1.275±0.146) N],Mtwo [(2.281±0.426) N],ProTaper Next [(3.104±0.252) N] and ProTaper [(4.227± 0.483) N] increased gradually and significantly.The NCF of Hyflex CM (582±99),TF (427±85),ProTaper Next (158 ± 22),Mtwo (129 ± 32) and ProTaper (65 ± 20) decreased gradually.Conclusions The 3 heat treatment techniques exert tremendous influence on the phase transformation behavior and mechanical characteristics of the files,which demonstrate improved bending property and cyclic fatigue resistance than the conventional ones.
- [1]杨殷杰,侯本祥,侯晓玫.自适应往复运动镍钛根管锉TFA的疲劳折断性能研究[J].2016,(3).
- [2]佟运祥.超细晶钛镍基形状记忆合金[M].2017.
- [3]Zhou HM,Zheng YF,Haapasalo M,etc.Metallurgical characterization of controlled memory wire nickel-titanium rotary instruments.[J].2011,37(11).
- [4]F, Miura,M, Mogi,Y, Ohura,etc.The super-elastic property of the Japanese NiTi alloy wire for use in orthodontics.[J].1986,90(1).
- [5]Ebihara A,Hou X,Yahata Y,etc.Phase transformation behaviour and bending property of twisted nickel-titanium endodontic instruments.[J].2011,44(3).
- [6]Capar, Ismail Davut,Kaval, Mehmet Emin,Ertas, Huseyin,etc.Comparison of the Cyclic Fatigue Resistance of 5 Different Rotary Pathfinding Instruments Made of Conventional Nickel-Titanium Wire, M-wire, and Controlled Memory Wire[J].2015,41(4).
- [7]Ligia Carolina Moreira Brasa,Ana Cristina Faria Silva.Impact of Heat Treatments on the Fatigue Resistance of Different Rotary Nickel-titanium Instruments[J].2014,40(9).
- [8].Cyclic fatigue resistance of ProTaper Next nickel-titanium rotary files[J].2014,47(11).
- [9]Zhou,H.-M.,Zheng,Y.-F.,Li,L.,etc.Mechanical properties of controlled memory and superelastic nickel-titanium wires used in the manufacture of rotary endodontic instruments[J].2012,38(11).
- [10]北京大学口腔医学院.一种镍钛根管锉悬臂弯曲性能测量夹持装置[P].2016.
- [11]N O, Varghese,Rajesh, Pillai,U-Nu, Sujathen,etc.Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study.[J].1900,19.
- [12]Elias,C.N.,Lopes,W.S.P.,Inojosa,I.F.J.,etc.Comparison of the mechanical properties of rotary instruments made of conventional nickel-titanium wire, M-Wire, or nickel-titanium alloy in R-phase[J].2013,39(4).
- [13]Iijima M,Brantley WA,Kovarik L,etc.Metallurgical characterization of a new nickel-titanium wire for rotary endodontic instruments.[J].2009,35(11).
- [14].Physical and mechanical properties of twisted or ground nickel-titanium instruments[J].2013,46(5).
- [15]Elnaghy, A. M.,Elsaka, S. E..Laboratory comparison of the mechanical properties of TRUShape with several nickel-titanium rotary instruments[J].2017,50(8).
- [16]Haapasalo M,Abtin H,Shen Y,etc.Fatigue testing of controlled memory wire nickel-titanium rotary instruments.[J].2011,37(7).
- [17]Pedulla, E.,Lo Savio, F.,Boninelli, S.,etc.Influence of cyclic torsional preloading on cyclic fatigue resistance of nickel - titanium instruments[J].2015,48(11).
- [18]K, Miyai,A, Ebihara,Y, Hayashi,etc.Influence of phase transformation on the torsional and bending properties of nickel-titanium rotary endodontic instruments.[J].2006,39(2).
- [19]Zheng,Y.-F.,Campbell,L.,Wang,Z.,etc.Phase transformation behavior and mechanical properties of thermomechanically treated K3XF nickel-titanium instruments[J].2013,39(7).
- [20]Mohsen, Aminsobhani,Mohamad Saleh, Khalatbari,Naghmeh, Meraji,etc.Evaluation of the Fractured Surface of Five Endodontic Rotary Instruments: A Metallurgical Study.[J].2016,(4).
- [21]Haapasalo,M.,Gao,Y.,Abtin,H.,etc.Effect of environment on fatigue failure of controlled memory wire nickel-titanium rotary instruments[J].2012,38(3).
- [22]Hye-Jin Goo,Sang Won Kwak,Jung-Hong Ha,etc.Mechanical Properties of Various Heat-treated Nickel-titanium Rotary Instruments[J].2017,43(11).
- [23]Topcuoglu, Huseyin Sinan,Topcuoglu, Gamze,Akti, Ahmet,etc.In Vitro Comparison of Cyclic Fatigue Resistance of ProTaper Next, HyFlex CM, OneShape, and ProTaper Universal Instruments in a Canal with a Double Curvature[J].2016,42(6).
- [24]Grande NM,Testarelli L,Al Sudani D,etc.Bending properties of a new nickel-titanium alloy with a lower percent by weight of nickel.[J].2011,37(9).