Comparison evaluation of Flexural Strength of Photopolymerized Composite Resin for 3D Printed Provisional Restorations

Abstract

Since the introduction of 3D printing technology, various equipment and materials have been developed and have expanded the scope of applications. Research related to the properties of newly developed materials is needed. Therefore, in this study, we compared the flexural strength of various temporary crown resins produced using 3D printing. Specimens were designed according to ISO 10477 standards (25 mm x 2 mm x 2 mm) for flexural strength measurement. Five types of resins from different manufacturers were selected, and specimens were printed using a digital light processing (DLP) printer (n=10, N=40). A three-point flexural strength test was conducted using a universal testing machine. To compare the groups, a one-way analysis of variance (ANOVA) was conducted, and Scheffe's post hoc test was used. Significant differences were observed among the groups (P < 0.05). However, since all groups exhibited values higher than the flexural strength threshold specified by ISO-10477, it is suggested that the resin materials would be acceptable for temporary restorations produced with 3D printing technology in all groups.