Evaluation For Elastic Modulus Of CAD-CAM Milled And 3D Printed Denture Base Resins

Document Type : Original Article

Authors

1 Badr University, Faculty of Dentistry, Department of Removable Prosthodontics, Badr city, Cairo.

2 Department of Dental Biomaterials, Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University

3 Department of Removable prosthodontics, Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University

Abstract

Objective: to compare the elastic modulus between milled, 3D printed and conventional compression moulded denture base resins (DBRs). Materials and methods: Three different types of DBRs were used, 1st one; milled resin (pre-polymerized PMMA plates), 2nd one; 3D printed resin (photopolymerized resin), 3rd one; polymethyl methacrylate (PMMA) heat cured resin (powder-liquid system). 30 specimens have been constructed with specific dimensions (65mm x10mm x3mm) and divided into 3 groups (10 for each group) according to the type of DBR, Group I contained the milled DBR specimens, Group II contained 3-dimentional printed DBR specimens, and Group III contained conventional compression moulded DBR specimens. The elastic modulus of the 30 specimens were measured and calculated by universal testing machine using three-point loading test. Data were calculated and analyzed using 1-way ANOVA and Tukey’s pair-wise post hoc tests. Results: The elastic modulus of the milled group was significantly higher than that of the other 2 groups (P<0.05), while the elastic modulus of the compression moulded group was significantly greater than that of the 3D printed group (P<0.05). Conclusion: milled DBR show the highest elastic modulus when compared with conventional compression moulded or 3D printed DBRs, while 3D printed DBR shows the lowest elastic modulus.

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Al-Azhar Journal of Dental Science
Volume 25, Issue 3 - Serial Number 3
July - Restorative Dentistry Issue (Removable Prosthodontics, Fixed Prosthodontics, Endodontics, Dental Biomaterials, Operative Dentistry)
July 2022
Pages 241-246

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