Modulus of Elasticity of Different Resin Denture Base Materials: A Comparative Study

Document Type : Original Article

Authors

1 BDS, 2015 G, Faculty of Dentistry, Sinai University Demonstrator Removable Prosthodontics Department Faculty of Dentistry, Sinai University.

2 Professor and chairman of Removable prosthodontic Department Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University

3 Removable Prosthodontics department, Faculty of Dentistry, Sinai University, sinai, Egypt

Abstract

Abstract
Objective: The objective of this in vitro study was to compare modulus of elasticity of CAD /CAM milled, 3D printed and flexible pressed resins. Materials and Methods: eighteen rectangular specimens with specific measurement (65mm X 10mm X 3 mm) were constructed from different resin denture base materials and divided into 3 groups (6 specimens for each group). Group I contained the CAD/CAM milled resin specimens, Group II contained 3D printed specimens and Group III contained polyamide flexible resin. The specimens were evaluated by the three-point bending test on universal testing machine (INSTRON) to calculated modulus of elasticity. Data was analyzed with ANOVA and Tukey’s pair-wise post-hoc tests. Results: The modulus of elasticity values of all groups ranged from 845.5 MPa to 2962.3 MPa. There were significant differences among the tested resin denture base materials. CAD/CAM milled materials had the highest modulus of elasticity, while the polyamide pressed materials had the lowest. The 3D-printed acrylics materials had lower modulus of elasticity values than CAD/CAM milled materials. Conclusion: The CAD/CAM milled and 3D printed denture base resins showed higher modulus of elasticity when evaluated with polyamide pressed materials.
Key words: Modulus of elasticity, CAD/CAM, 3D-printed, denture base.

Keywords

Al-Azhar Journal of Dental Science
Volume 26, Issue 3 - Serial Number 3
July - Restorative Dentistry Issue (Removable Prosthodontics, Fixed Prosthodontics, Endodontics, Dental Biomaterials, Operative Dentistry)
July 2023
Pages 277-281

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