Rodríguez-Guardado Wendy E, Rivera-Muñoz Eric M, Serrano-Bello Janeth, Alvarez-Perez Marco A, Domínguez-Pérez Rubén A, Salmerón-Valdés Elias Nahum, Vázquez Vázquez Febe C, Chanes-Cuevas Osmar A, Millán-Malo Beatriz, Peza-Ledesma Carmen L, Correa-Prado Rodrigo
Multidisciplinary Dental Research Laboratory, School of Medicine, Autonomous University of Querétaro, Santiago de Querétaro, Mexico.
Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, A.P. 1-1010, Querétaro, 76000, México.
Sci Rep. 2024 Apr 6;14(1):8075. doi: 10.1038/s41598-024-58649-9.
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. The objective of this study was to determine if the chemical and structural characteristics could cause to increase the fracture resistance, we used four bis-acryl resins Luxatemp, Protemp, Structur and Telio. Three-points bending by Flexural test were performed in ten bars and they were carried out to compare with Anova test. In addition, the bis-acryl resins were analyzed by scanning electron microscopy, to analyze microstructure and morphology and the molecular structure were performed by Infrared Spectroscopy through Attenuated Total Reflectance. A higher flexural strength was found in Luxatemp and Structur with, no significant differences between this study groups. Regarding Protemp and Telio, these study groups showed a lower flexural strength when were compared with Luxatemp and Structur. These results corroborate SEM and ATR analysis because Luxatemp sample showed a regular size particle on the surface and chemically presents a long cross-linkage polymer chain. The presence of CO, SiO and N-H groups as a fillers particle interacting with OH groups cause a higher flexural strength compared with another groups.
在制作固定修复体（包括单端桥和冠）时，选择具有最佳特性和性能的材料对于预测成功的临床治疗很重要。本研究的目的是确定化学和结构特征是否会导致抗折性增加，我们使用了四种双丙烯酸树脂Luxatemp、Protemp、Structur和Telio。对十根棒材进行三点弯曲的挠曲试验，并通过方差分析进行比较。此外，通过扫描电子显微镜分析双丙烯酸树脂，以分析微观结构和形态，并通过衰减全反射红外光谱对分子结构进行分析。在Luxatemp和Structur中发现了较高的挠曲强度，本研究组之间无显著差异。关于Protemp和Telio，与Luxatemp和Structur相比，这些研究组的挠曲强度较低。这些结果证实了扫描电子显微镜和衰减全反射分析，因为Luxatemp样品表面呈现规则尺寸的颗粒，并且在化学上呈现长交联聚合物链。与其他组相比，作为填料颗粒的CO、SiO和N-H基团与OH基团相互作用导致更高的挠曲强度。
