Load Values Influence on Stresses in Monolithic Ceramic Molar Crowns

AUTHOR(S):

Liliana Porojan, Florin Topala, Sorin Porojan

KEYWORDS

monolithic ceramic crown, posterior teeth, zirconia, glass ceramic, load, finite element analysis, maximal principal stresses

ABSTRACT

Zirconia is considered a proper material for posterior teeth restoration, because of the excellent aesthetic quality, biocompatibility, and mechanical properties, in order to replace existing ceramic systems. Even computer-controlled techniques are used in producing dental crowns in order to improve the accuracy during the manufacturing process, not enough studies have been conducted on stresses in aesthetic monolithic crowns regarding the load values. Therefore, the goal of this study was to compare the stresses in anatomic contour zirconia crown to that of glass ceramic crown regarding the load values, from biomechanical point of view. A static structural analysis was performed to calculate the stress distribution using the computer-aided finite element analysis software. The maximal principal stresses in the crowns don't exceed the strength of the materials in case of 200 N load for both studied materials. For glass ceramic at a load of 400 N maximal principal stresses exceed the tensile strength value of the material. Stress values and distribution results can provide design guidelines for new and varied aesthetic crowns, in order to withstand functional loads in the posterior areas.

Cite this paper

Liliana Porojan, Florin Topala, Sorin Porojan. (2016) Load Values Influence on Stresses in Monolithic Ceramic Molar Crowns. International Journal of Theoretical and Applied Mechanics, 1, 165-169