کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1421236 | 986400 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mechanical behavior of M-Wire and conventional NiTi wire used to manufacture rotary endodontic instruments Mechanical behavior of M-Wire and conventional NiTi wire used to manufacture rotary endodontic instruments](/preview/png/1421236.png)
ObjectiveComparison of physical and mechanical properties of one conventional and a new NiTi wire, which had received an additional thermomechanical treatment.MethodsSpecimens of both conventional (NiTi) and the new type of wire, called M-Wire (MW), were subjected to tensile and three-point bending tests, Vickers microhardness measurements, and to rotating-bending fatigue tests at a strain-controlled level of 6%. Fracture surfaces were observed by scanning electron microscopy and the non-deformed microstructures by transmission electron microscopy.ResultsThe thermomechanical treatment applied to produce the M-Wire apparently increased the tensile strength and Vickers microhardness of the material, but its apparent Young modulus was smaller than that of conventionally treated NiTi. The three-point bending tests showed a higher flexibility for MW which also exhibited a significantly higher number of cycles to failure.SignificanceM-Wire presented mechanical properties that can render endodontic instruments more flexible and fatigue resistant than those made with conventionally processed NiTi wires.
Journal: Dental Materials - Volume 29, Issue 12, December 2013, Pages e318–e324