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11 October 2023 A 3D finite element analysis for the influence of different marginal finish line design on stress distribution in posterior monolithic zirconia crown prosthetic system
Jing Wang, Juan Du, Dewu Yang, Luxi Weng, Junying Wang
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Proceedings Volume 12918, Fourth International Conference on Computer Science and Communication Technology (ICCSCT 2023); 129181I (2023) https://doi.org/10.1117/12.3009237
Event: International Conference on Computer Science and Communication Technology (ICCSCT 2023), 2023, Wuhan, China
Abstract
The purpose of this paper was to evaluate the effect of four kinds of marginal finish line design on stress distribution in posterior zirconia all-porcelain crown prosthetic system. Four 3D finite element models with different margin designs of mandibular first molar restorated by zirconia all-porcelain crown were developed. Each model was designed with one kind of finish line margin respectively (SC0.5: shallow concave finish line with a width of 0.5 mm; SC1.0: shallow concave finish line with a width of 1.0 mm; RA0.5: right angle finish line with a width of 0.5 mm; RA1.0: right angle finish line with a width of 1.0 mm). A load of 670 N which equals the greatest masticatory pressure in centric occlusion was applied to the zirconia all-porcelain crown vertically. The other load of 220 N simulating the lateral occlusion was applied at 45 degrees to the long axis of the abutment tooth. Then FE analysis was performed in each situation to observe stress distributions and Von Mises stress values in each layer of the zirconia prosthetic system which consisted of zirconia crown, cement layer, and abutment tooth. For all models, stress was localized in the occlusal loading area and the boundary of the crown. The minimum stress values were obtained in model SC1.0, the greatest stress values occurred in model RA0.5. Furthermore, the Von Mises stress values of the SC group were apparently higher than that of the RA group. The FEA method can effectively evaluate the stress in finish line. The results suggested that a combination of shallow concave finish line with a width of 0.5 mm potentially have more suitable geometry to reduce stress concentration.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Jing Wang, Juan Du, Dewu Yang, Luxi Weng, and Junying Wang "A 3D finite element analysis for the influence of different marginal finish line design on stress distribution in posterior monolithic zirconia crown prosthetic system", Proc. SPIE 12918, Fourth International Conference on Computer Science and Communication Technology (ICCSCT 2023), 129181I (11 October 2023); https://doi.org/10.1117/12.3009237
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KEYWORDS
Zirconium dioxide
Teeth
Finite element methods
3D modeling
Design and modelling
Cements
Materials properties
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