Influence of Shoulder and Chamfer Margin Design on the Stress Distribution Pattern in Different All Ceramic Restorations by Three-Dimensional Finite Element Analysis

Online Journal of Dentistry & Oral Health 

The purpose of this study was to evaluate the influence of shoulder and chamfer margin design on stress distribution pattern in different all ceramic restorations. Six three-dimensional finite element models representing mandibular second premolar tooth were constructed, using a Finite Element Analysis Software (ANSYS version 14; ANSYS Inc., Canonsburg, PA, USA). Three models each with shoulder and chamfer finish line were created after tooth preparation by reverse engineering, using Pro E software. Each model with shoulder finish line margin had Bruxzir (Glidewell labs), Lava (3M ESPEE) and IPS e.max Press (Ivoclar Vivadent) all ceramic restorations fabricated over them. Same was done with the models having chamfer finish margin. A distributed load of 600 N was applied on the restorations to analyze the stress distribution pattern in different all ceramic restorations having different marginal geometry. The stress distribution in different groups was compared using one-way ANOVA and Tukey’s honest significance test.

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