Influence of Resin Cement Thickness and Elastic Modulus on the Stress Distribution of Zirconium Dioxide Inlay-Bridge: 3D Finite Element Analysis

• Published in: Polymers Vol. 13; no. 22; p. 3863
• Main Authors: Assaf, Joseph, Hardan, Louis, Kassis, Cynthia, Bourgi, Rim, Devoto, Walter, Amm, Elie, Moussa, Carol, Sawicki, Jacek, Lukomska-Szymanska, Monika
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 09.11.2021; MDPI
• Subjects: adhesive prosthesis; Axial loads; Bonding agents; CAD; cement spacer; Cements; Composite materials; Computed tomography; Computer aided design; Deformation; Dental materials; Dentures; elastic modulus; F 2 region; Finite element analysis; Finite element method; inlay bridge; Mechanical properties; Modulus of elasticity; Prostheses; Resin bonding; resin cement; Shear stress; Strain; Stress distribution; Teeth; Thickness; Three dimensional analysis; Three dimensional models; Zirconium; Zirconium dioxide; United States > US
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym13223863

The mechanical properties and the thickness of the resin cement agents used for bonding inlay bridges can modify the clinical performance of the restoration such as debonding or prosthetic materials fracture. Thus, the aim of this study was to evaluate the stress distribution and the maximum strain generated by resin cements with different elastic moduli and thicknesses used to cement resin-bonded fixed partial denture (RBFPD). A three-dimensional (3D) finite element analysis (FEA) was used, and a 3D model was created based on a Cone-Beam Computed Tomography system (CBCT). The model was analyzed by the Ansys software. The model fixation occurred at the root of the abutment teeth and an axial load of 300 N was applied on the occlusal surface of the pontic. The highest stress value was observed for the Variolink 0.4 group (1.76 × 106 Pa), while the lowest was noted for the Panavia 0.2 group (1.07 × 106 Pa). Furthermore, the highest total deformation value was found for the Variolink 0.2 group (3.36 × 10−4 m), while the lowest was observed for the Panavia 0.4 group (2.33 × 10−4 m). By means of this FEA, 0.2 mm layer Panavia F2.0 seemed to exhibit a more favorable stress distribution when used for cementation of posterior zirconium-dioxide-based RBFPD. However, both studied materials possessed clinically acceptable properties.