Study on bending behaviour of nickel-titanium rotary endodontic instruments by analytical and numerical analyses.

ABSTRACT:

Aim

To develop analytical models and analyse the stress distribution and flexibility of nickel-titanium (NiTi) instruments subject to bending forces.

Methodology

The analytical method was used to analyse the behaviours of NiTi instruments under bending forces. Two NiTi instruments (RaCe and Mani NRT) with different cross-sections and geometries were considered. Analytical results were derived using Euler-Bernoulli nonlinear differential equations that took into account the screw pitch variation of these NiTi instruments. In addition, the nonlinear deformation analysis based on the analytical model and the finite element nonlinear analysis was carried out. Numerical results are obtained by carrying out a finite element method.

Results

According to analytical results, t

SUBMITTER: Tsao CC 

PROVIDER: S-EPMC3617459 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature