%0 Journal Article
%T Comparison of the Flexural Strength and Elastic Modulus of Conventional, Milled and 3D-Printed Interim Restorative Materials Subjected to Different Intervals of Accelerated Aging
%A Ala¡¯a I. Abu-Obaid
%A Alanoud M. Alotaibi
%A Alanoud F. Binmeqren
%A Raghd A. Albarrak
%A Maram S. Albaqami
%A Abdullah S. Alshahrani
%J Open Access Library Journal
%V 11
%N 8
%P 1-14
%@ 2333-9721
%D 2024
%I Open Access Library
%R 10.4236/oalib.1111959
%X <strong>Aim:</strong> To compare the flexural strength and elastic modulus of different interim restorative materials subjected to different intervals of accelerated aging. <strong>Materials and Method:</strong> Three groups of interim restorative materials (N = 120) were prepared using three different manufacturing techniques: conventional PMMA resin (Jet Tooth Shade), computer-aided design/computer-aided manufacturing (CAD/CAM) milled resin blocks (Telio CAD), and three-dimensional (3D) printed resin (Crown &amp; Bridge NextDent). The specimens from each group were subdivided into four equal subgroups (n = 10) and subjected to accelerated aging through thermocycling and brushing according to different time intervals of aging (baseline, 3 months, 6 months, and 12 months). The flexural strength and elastic modulus were measured using a three-point bending test. The data were analyzed using two-way analyses of variance (ANOVA), one-way ANOVA, and Tukey¡¯s post hoc test at a significance level of 0.05. <strong>Results:</strong> At baseline, the flexural strength and elastic modulus were significantly greater in the CAD/CAM milled group (p &lt; 0.05) than in the conventional and 3D-printed groups. However, no significant difference in flexural strength was observed between the conventional and 3D-printed groups. However, a significant difference (p &lt; 0.05) in the elastic modulus was observed between the conventional and 3D-printed groups. At all aging intervals (3, 6 and 12 months), the flexural strength and elastic modulus were significantly greater (p &lt; 0.05) in the CAD/CAM milled group than in the conventional group and the 3D-printed group. Within each material tested, the baseline group had significantly greater values (p &lt; 0.05) than did the other age groups. However, there was no significant difference observed among the age intervals of 3, 6, and 12 months, except for the CAD/CAM milled group. In the 12-month aging group, a significant difference (p &lt; 0.05) in the elastic modulus was found; no significant difference (p &lt; 0.05) was observed between the 3 and 6-month aging groups. <strong>Conclusion:</strong> The CAD/CAM milled group consistently outperformed the conventional and 3D-printed groups in all age intervals. Therefore, the CAD/CAM milling technique could be recommended for long-term temporization for patients with increased occlusal forces, such as parafunctional habits, or for full-arch implant-supported interim prostheses.
%K Interim Restoration
%K CAD/CAM Milled
%K 3D-Printing
%K Flexural Strength
%K Elastic Modulus
%K Accelerated Aging
%U http://www.oalib.com/paper/6832057