Physical and Structural Characterization of Bis-Acryl Composite Resin

Objective: To determine if the chemical and structural characteristics could cause to increase the fracture resistance using four bis-acryl resins Luxatemp, Protemp, Structur and Telio. Materials and Methods Three-points bending by Flexural test, SEM, and FTIR were carried out to compare the Kruskal-Wallis test. Results The Kruskal-Wallis test indicated a significant difference in the materials (< 0.0001) that showed higher flexural strength found in Luxatemp, while comparing all bis-acryl resins by Dunn's multiple comparison test indicate that there was no significant difference between Luxatemp VS Structur, and Protemp VS Telio. SEM analysis showed that different sizes of filler particles were observed in all samples, which causes them to present irregular surfaces. By FTIR, typical C = O and CH 2 groups were observed corresponding to methyl methacrylate and methylene groups respectively, and different bands located at 1460 − 1350 cm − 1 assigned to pigment materials, stabilizers, and filler particles. In conclusion, a long cross-linkage polymer chain, and the presence of CO 3 , SiO 2 and N-H groups as a fillers particle interacting with OH groups could be the cause of our results. Conclusion It is necessary a longer storage under a different condition that would emulate the oral environment and allow us to determine changes in the chemical compounds as well as changes in ultrastructural characteristics related to mechanical properties to identify their correct clinical use. Clinical Relevance During the preparation of fixed prosthesis (including individual bridges and crowns) it is important to select the materials that have the best features and properties to predict a successful clinical treatment.