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Updated: Nov 16, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

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Static Analysis with a Realistic Loading Condition on All-Ceramic Crown Prosthesis During Chewing

Wenlong Qin, Ming Cong, Xiang Ren

The International Journal of Prosthodontics

|February 22, 2021

Summary

This study analyzed stress on dental crowns during chewing. Realistic, nonuniform forces revealed unique stress patterns, making this method superior for prosthesis evaluation.

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Published on: February 2, 2018

Area of Science:

Biomaterials Science
Dental Mechanics
Finite Element Analysis

Background:

Dental prostheses, such as single-tooth crowns, must withstand complex chewing forces.
Accurate simulation of occlusal loading is crucial for predicting prosthesis longevity and performance.
Previous analyses often simplified chewing dynamics, potentially misrepresenting real-world stress distributions.

Purpose of the Study:

To evaluate stress distribution in a dental prosthesis under realistic chewing conditions using static analysis.
To compare stress patterns generated by uniform, concentrated, and nonuniform loading scenarios.
To establish an evidence-based method for simulating prosthesis biomechanics.

Main Methods:

An all-ceramic crown on a mandibular first molar was modeled.
Automated contact analysis determined three chewing contact states (intrusive, transition, extrusive).
Normal and tangential forces were calculated based on contact and food properties, followed by static analysis with fixed boundary conditions.

Main Results:

Occlusal force distribution under static analysis was nonuniform.
Nonuniform loading revealed distinct stress distribution characteristics compared to uniform or concentrated loads.
The simulated stress patterns under realistic conditions differed significantly from simplified models.

Conclusions:

The developed static analysis procedure, grounded in contact analysis, provides an evidence-based approach.
Static analysis incorporating nonuniform loading is recommended over uniform or concentrated loading for prosthesis evaluation.
This method offers a more realistic assessment of stress distribution in dental crowns during mastication.