RESUMEN
Objective:To construct of 3-dimensional finite element models of mandibular first molar with structure defect restoration.Methods:Reverse engineering technology was used. Geometric models were built by the use of advanced 3-dimensional laser scanning and computer assisted 3-dimensional design technique. The geometric data were introduced into the finite element software for establishing the finite element mesh after being processed.Results:The 3-dimensional finite element models of the minimum distal occlusal structure defect with restoration were created, which included metal crown with exterior anatomic morphology of the mandibular first molar, tooth preparation, filling material and the structure of periodontal membrane.Conclusion: The method may be a useful approach for building models of teeth and relative tissues.