Influência da destruição parcial de estrutura dental e material restaurador no comportamento biomecânico de pré-molar superior análise por elementos finitos

Abstract

The need for coating cusp and ratio of cavity preparation and restorative material are important factors in clinical practice and laboratory studies . The aim of this study was, through the finite element 3D method , to analyze biomechanical behavior of maxillary premolars ranging the type of preparation and restorative material. Through scanning of a premolar with anatomy average model was generated simulating a premolar, Were subsequently simulated inlay and onlay preparations and restored with these material properties similar to composite resin (16.6 GPa); resin laboratory (18.8 GPa) reinforced ceramic with lithium disilicate (102 GPa); reinforced ceramics with leucite (65 GPa). Was simulated load of 50 N in each side grinding of buccal and palatal cusp. It was concluded that, materials with higher modulus of elasticity tranfer less stress for tooth structure. However, materials with modulus of elasticity much larger than dental structure in cavities inlays, not present adequate stress concentration. The models that used reinforced ceramics with leucite show a behavior biomechanical closest to healthy teeth.