Numerical Analysis of the Influence of Cement Thickness on Stress Distribution in All-ceramic Crowns
CHEN Guo-liang
JIANG Wen-tao
WANG Hua-rong
FAN Yu-bo
Abstract：Objective To provide theoretical basis for clinical treatment of all-ceramic crown prosthodontics, the influence of cement thickness on the stress distribution in all-ceramic crowns under load was studied numerically. Methods The finite element analysis( FEA) model of a standard mandibular first molar was established using spiral CT and CAD software, and then it was applied to analyze the stress distribution of all-ceramic crowns under vertical loading using FEA software. Results Stress concentration was found in mesial and distal cement; the stress distribution at the cement upper and lower interface was found to be similar, and the stress magnitude discrepancy between the two interfaces was small; the stress of the model with 0. 15 mm cement in the cervix was lower about 30% than the one of the 0.05 mm model. Conclusions The cement thickness plays an important role in the stress distribution of all-ceramic restoration system. The model with 0. 15 mm cement shows a better resistance to destruction among the three models investigated.
Keywords：all-ceramic crownscement thicknessfinite element analysis
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 69-73 )