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[Finite element stress analysis of all-ceramic crown of the upper central incisor in differential thickness]
Jian Hu1, Feimin Zhang, Ning Dai
1Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China.
Objective:
To investigate the stress distributions under load in an all-ceramic crown of the upper central incisor in differential thickness.
Methods:
The 3-dimensional finite element model of all-ceramic crown of the upper central incisor in differential thickness was applied with differential loads (100, 150, 200 N). The stress values and distributions of all-ceramic crown were calculated and expressed.
Results:
The tendency of stress distributions in all-ceramic crown of differential thickness and loads was similar. The maximal stress intensity value was located in the loading site and the cervical region. As the thickness of all-ceramic crown increased, the stress concentration reduced. When the load increased, the stress values increased, especially in the loading site and the cervical region.
Conclusion:
The increasing of the thickness of all-ceramic crown will decrease stress concentration. Because stress concentration is mainly in cervical region and loading site, these regions should be cared in fabrication of all-ceramic crown.
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