Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments

Table 1

Summary of the Finite Element modelling results (GT file’s results were used as reference for the relative deformations and stresses).

	Geometry	Material	Absolute deformation	Relative deformation	Absolute maximum stress	Relative maximum stress
Force 1 N	GT	NiTi	5.73 mm	—	586 MPa	—
	GTX	NiTi	5.98 mm	+4.4%	594 MPa	+1.4%
		M-Wire	7.29 mm	+27.2%	476 MPa	−18.8%
Torque 2.5 N mm	GT	NiTi	53°	—	1016 MPa	—
	GTX	NiTi	109°	+105.7%	893 MPa	−12.1%
		M-Wire	133°	+150.9%	914 MPa	−10.0%
1/2 Torque 1.25 N mm	GT	NiTi	13°	—	511 MPa	—
	GTX	NiTi	23°	+76.9%	548 MPa	+7.2%
		M-Wire	39°	+200.0%	499 MPa	−2.3%