Stress prediction in a central incisor with intra-radicular restorations

Abstract

A 2D fi nite element analysis was applied to calculate shear and von Mises equivalent stresses developed, under masticatory loading, in an upper central incisor restored with cast gold post and carbon fi ber reinforced epoxy resin post. Based on the predicted shear stress levels, it is concluded that the gold post model is more prone to shear failure along the post-dentin interface. Whereas shear stress concentration also occurs in both models at the core-crown interface, the stress level predicted there is higher for the carbon fi ber post model which would be more susceptible to crown displacement. Finally, the prediction of von Mises equivalent stress indicates a nonuniform distribution, with the stress preferentially concentrated in the gold post along its interface with the tooth dentin. For the carbon fi ber post restored model, on the other hand, the von Mises stresses are more uniformly distributed achieving its maximum level in the tooth dentin.

Influence of inhomogeneous dental posts on stress distribution in tooth root and interfaces: Three-dimensional finite element analysis

“…Shear stresses tend to generate a relative sliding between restoration and tooth and any increase can disrupt the adhesive bonding of the restoration. 4,7,32 Although adhesion loss causes restorations to fail, cement failure is another primary reason for the failure of restorations. 33 Therefore, the MTS at the cements was also calculated to judge the likelihood of cohesive failure.…”

“…[1][2][3] Restoration of severely damaged teeth may require post-core and crowns. 4,5 Cementing a post into the root of an endodontically treated tooth improves the fracture resistance of maxillary incisor teeth with cervical cavities. 6 Generally, 2 different kinds of posts are currently used: cast metal posts and prefabricated posts.…”

Biomechanical Analysis of a Custom-Made Mouthguard Reinforced With Different Elastic Modulus Laminates During a Simulated Maxillofacial Trauma

“…The group descriptions and the laminate materials’ elastic modulus are summarized in Table 1. 17 -19…”

<p>A 10-Year Follow-Up of Different Intra-Radicular Retainers in Teeth Restored with Zirconia Crowns</p>

“…Caries, fractures, invasive endodontic access, iatrogenies, trauma, non-carious lesions, and extensive restorations can generate great coronary loss to a dental element. Teeth with severe damage may require prosthetic restorations by intraradicular retainers when the remnant tooth structure is no longer sufficient, [1][2][3][4][5][6][7] especially when the coronal destruction involves greater than 50% of the structure. 8 Intracanal retainers can be made of different materials: metal (prefabricated or casted), prefabricated fiberglass, or ceramic.…”