[Establishing a FEM of mandibular first molar and stress analysis].

OBJECTIVE: Establishing a finite element model of mandibular first molar with analysis of the stress distribution to each of the tooth parts on the model. METHODS: The right mandibular first molar in vitro was scanned and the image was processed. The three dimensional finite-element model was established by the special software and loaded on it. RESULTS: Stress distribution on each part of the tooth was obtained. The maximum values of compressive stress, tensile stress and mises stress were calculated. CONCLUSION: In the research and analysis of the tooth stress, the finite element method is simple, effective, safe and reliable.