Stress analysis of an upper central incisor restored with different posts

Area of Science:

• Biomaterials Science
• Dental Materials
• Biomechanics

Background:

• Endodontically treated teeth require structural reinforcement with posts.
• The choice of post material and shape influences stress distribution within the tooth.

Purpose of the Study:

• To evaluate the effect of different post shapes and materials on stress distribution in endodontically treated incisors.
• To compare stress concentrations at the post/dentin interface and near the alveolar bone crest.

Main Methods:

• Two-dimensional Finite Element Method (FEM) analysis was employed.
• Simulated a static load of 100N at a 45-degree inclination on the incisor edge.
• Investigated three post shapes (tapered, cylindrical, two-stage cylindrical) and three materials (stainless steel, titanium, carbon fiber/Bis-GMA).

Main Results:

• Stress concentrations near the alveolar bone crest were not significantly affected by post parameters.
• Significant variations in stress concentrations were observed at the post/dentin interface based on post shape and material.
• Post material had a greater impact on stress concentration than post shape.
• Stainless steel posts exhibited the highest stress concentration, followed by titanium, then carbon/Bis-GMA posts.

Conclusions:

• Post material is a critical factor in managing stress distribution in endodontically treated incisors.
• Carbon fiber/Bis-GMA posts demonstrate superior stress-reducing properties compared to stainless steel and titanium.
• Material selection for posts should prioritize minimizing stress concentration at the post/dentin interface for improved long-term prognosis.