1 research outputs found
Effect of the design of the preparation for an endocrown-type restoration and its relationship with the thickness of the floor of the pulp chamber and the roof of the furcation, analyzed through the finite element method
Antecedentes: falta de evidencia sobre la variaci贸n de espesor y altura del remanente dental con restauraciones de tipo endocorna Objetivo: Analizar la distribuci贸n de esfuerzos y deformaciones en la estructura dental remanente restaurada con endocoronas a trav茅s del An谩lisis de elementos finitos (AEF). M茅todos: Se realizo el modelamiento de la estructura dental a partir de una tomograf铆a del diente 16, analizada a trav茅s del AEF, en donde se dise帽aron 4 diferentes preparaciones, que inclu铆an variaci贸n en la altura de las paredes axiales y en el espesor entre el piso de la c谩mara pulpar y techo de furca, evaluadas con tres tipos de materiales (VITA Enamic, Lava Ultimate y Brilliant Crios), generando as铆 12 modelos estudiados, a los cuales se les aplico un fuerza de 700N, con una esfera de 5mm de di谩metro. Las variables fueron analizadas seg煤n la prueba de Kruskall Wallis o ANOVA unidireccional. Resultados: Se present贸 una diferencia estad铆sticamente significativa en la concentraci贸n de esfuerzos y deformaci贸n a nivel de la estructura del esmalte, dentina y ligamento y no se present贸 una diferencia estad铆sticamente significativa en la endocorona y la resina. La variaci贸n de las altura de las paredes axiales con espesor de 1mm y 2 mm, mostraron los mayores valores de concentraci贸n de esfuerzos. Conclusi贸n: Se encontr贸 un efecto en la variaci贸n de las alturas de las paredes axiales y espesor del piso de la c谩mara pulpar a furca, sobre la distribuci贸n de esfuerzo y deformaci贸n.Background: lack of evidence on the variation of thickness and height of the dental remnant with endocorne-type restorations Objective: To analyze the distribution of stresses and strains in the remaining dental structure restored with endocrowns through Finite Element Analysis (FEA). Methods: The modeling of the dental structure was carried out from a tomography of tooth 16, analyzed through the AEF, where 4 different preparations were designed, which varied in the height of the axial walls and in the thickness between the floor of the pulp chamber and furcation roof, evaluated with three types of materials (VITA Enamic, Lava Ultimate and Brilliant Crios), thus discovering 12 studied models, to which a force of 700N is applied, with a 5mm diameter sphere. The variables were analyzed according to the Kruskall Wallis test or one-way ANOVA. Results: There was a statistically significant difference in the concentration of efforts and strain at the level of the structure of the enamel, dentin and ligament and there was no statistically significant difference in the endocrown and the resin. The variation of the heights of the axial walls with a thickness of 1 mm and 2 mm, showed the highest stress concentration values. Conclusion: An effect was found in the variation of the heights of the axial walls and thickness of the floor of the pulp chamber to the furcation, on the distribution of stress and strain.Especialista en Rehabilitaci贸n OralEspecializaci贸