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3D FEA of cemented glass fiber and cast posts with various dental cements in a maxillary central incisor.

Madfa AA, Al-Hamzi MA, Al-Sanabani FA, Al-Qudaimi NH, Yue XG - Springerplus (2015)

Bottom Line: There was negligible difference in peak of shear stress when various cements were compared, irrespective of post materials.The shear stress had same trend for all cement materials.This study found that the glass fiber dental post reduced the shear stress concentration at interfacial of post and cement/dentine compared to Ni-Cr alloy cast dental post.

View Article: PubMed Central - PubMed

Affiliation: Department of Conservative Dentistry, Faculty of Dentistry, University of Thamar, Dhamar, Yemen.

ABSTRACT
This study aimed to analyse and compare the stability of two dental posts cemented with four different luting agents by examining their shear stress transfer through the FEM. Eight three-dimensional finite element models of a maxillary central incisor restored with glass fiber and Ni-Cr alloy cast dental posts. Each dental post was luted with zinc phosphate, Panavia resin, super bond C&B resin and glass ionomer materials. Finite element models were constructed and oblique loading of 100 N was applied. The distribution of shear stress was investigated at posts and cement/dentine interfaces using ABAQUS/CAE software. The peak shear stress for glass fiber post models minimized approximately three to four times of those for Ni-Cr alloy cast post models. There was negligible difference in peak of shear stress when various cements were compared, irrespective of post materials. The shear stress had same trend for all cement materials. This study found that the glass fiber dental post reduced the shear stress concentration at interfacial of post and cement/dentine compared to Ni-Cr alloy cast dental post.

No MeSH data available.


Contour plots of the shear stress distribution in ZY direction within the tooth and the post when loaded obliquely
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Fig4: Contour plots of the shear stress distribution in ZY direction within the tooth and the post when loaded obliquely

Mentions: Shear stress for different post and cement materials following oblique loading are presented in Figs. 2, 3 and 4. Generally, maximum shear stress concentrated at the coronal third of the root (dentine) both on the labial and palatal aspect of the root and also concentrated at apical third of post and cement/dentine interfaces, regardless of post and cement materials.Fig. 2


3D FEA of cemented glass fiber and cast posts with various dental cements in a maxillary central incisor.

Madfa AA, Al-Hamzi MA, Al-Sanabani FA, Al-Qudaimi NH, Yue XG - Springerplus (2015)

Contour plots of the shear stress distribution in ZY direction within the tooth and the post when loaded obliquely
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4627971&req=5

Fig4: Contour plots of the shear stress distribution in ZY direction within the tooth and the post when loaded obliquely
Mentions: Shear stress for different post and cement materials following oblique loading are presented in Figs. 2, 3 and 4. Generally, maximum shear stress concentrated at the coronal third of the root (dentine) both on the labial and palatal aspect of the root and also concentrated at apical third of post and cement/dentine interfaces, regardless of post and cement materials.Fig. 2

Bottom Line: There was negligible difference in peak of shear stress when various cements were compared, irrespective of post materials.The shear stress had same trend for all cement materials.This study found that the glass fiber dental post reduced the shear stress concentration at interfacial of post and cement/dentine compared to Ni-Cr alloy cast dental post.

View Article: PubMed Central - PubMed

Affiliation: Department of Conservative Dentistry, Faculty of Dentistry, University of Thamar, Dhamar, Yemen.

ABSTRACT
This study aimed to analyse and compare the stability of two dental posts cemented with four different luting agents by examining their shear stress transfer through the FEM. Eight three-dimensional finite element models of a maxillary central incisor restored with glass fiber and Ni-Cr alloy cast dental posts. Each dental post was luted with zinc phosphate, Panavia resin, super bond C&B resin and glass ionomer materials. Finite element models were constructed and oblique loading of 100 N was applied. The distribution of shear stress was investigated at posts and cement/dentine interfaces using ABAQUS/CAE software. The peak shear stress for glass fiber post models minimized approximately three to four times of those for Ni-Cr alloy cast post models. There was negligible difference in peak of shear stress when various cements were compared, irrespective of post materials. The shear stress had same trend for all cement materials. This study found that the glass fiber dental post reduced the shear stress concentration at interfacial of post and cement/dentine compared to Ni-Cr alloy cast dental post.

No MeSH data available.