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Year : 2013  |  Volume : 3  |  Issue : 2  |  Page : 65-69

Stress distribution of new generation of Twisted Files in comparison with ProTaper: A finite element analysis

Department of Conservative Dentistry, Sri Dharmasthala Manjunatheshwara, SDM College of Dental Sciences and Hospital, Sattur, Dharwad, India

Correspondence Address:
Harsha Pujari
E2 - 204 Emerald Chs Ltd, Highland Park, Amar Nagar, Darga [rd], Mulund [West], Mumbai - 400 080
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1658-5984.118149

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Aim: To compare and evaluate the stress distribution of new generation of Twisted File in comparison with ProTaper under bending or torsional conditions using a finite - element analysis model. Materials and Methods: Two NiTi files, a ProTaper file and the latest generation nickel titanium file which is the Twisted File of similar tip diameter were scanned using White light scanning system. Through this a real size digitized models of the two brands of NiTi instruments were obtained. Then, the outline of the instrument was extracted from the stacks of 3D data in software. Finally a mesh of linear, eight-noded, hexahedral elements was overlaid onto the rendered 3D image. The behavior of the instrument under bending or torsional loads was then analyzed mathematically in the software (ABAQUS V6, 5-1) taking into consideration the non linear mechanical characteristic of NiTi material. The results were expressed as von Mises stresses and were calculated by the von Mises criteria. Results: Higher stress values were seen in Twisted Files than the ProTaper universal, however, the angular deflection was seen to be more in Twisted Files. Conclusion: As more angular deflection was seen in Twisted File it was more flexible than ProTaper Universal but did not have the uniform stress distribution like the ProTaper universal.

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