State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China.
ACS Biomater Sci Eng. 2024 Jun 10;10(6):3718-3726. doi: 10.1021/acsbiomaterials.4c00403. Epub 2024 May 8.
The performance of dental resin composites is crucially influenced by the sizes and distributions of inorganic fillers. Despite the investigation of a variety of functional particles, glass fillers and nanoscale silica are still the predominant types in dental materials. However, achieving an overall improvement in the performance of resin composites through the optimization of their formulations remains a challenge. This work introduced a "dense" microhybrid filler system with 85 wt % filler loading, leading to the preparation of self-developed resin composites (SRCs). Comparative evaluations of these five SRCs against four commercial products were performed, including mechanical property, polymerization conversion, and shrinkage, along with water sorption and solubility and wear resistance. The results showed that among all SRC groups, SRC3 demonstrated superior mechanical performance, high polymerization conversion, reduced shrinkage, low water absorption and solubility, and acceptable wear resistance. In contrast to commercial products, this optimal SRC3 material was comparable to Z350 XT in flexural and diametral tensile strength and better in flexural modulus and surface hardness. The use of a "dense" microhybrid filler system in the development of resin composites provides a balance between physicochemical property and wear resistance, which may be a promising strategy for the development of composite products.
牙科树脂复合材料的性能主要受到无机填料的粒径和分布的影响。尽管已经研究了多种功能性颗粒，但玻璃填料和纳米级二氧化硅仍然是牙科材料中主要的类型。然而，通过优化其配方来全面提高树脂复合材料的性能仍然是一个挑战。本工作引入了一种 85wt%填充剂负载的“致密”微混合填料系统，从而制备了自主研发的树脂复合材料（SRC）。对这五组 SRC 与四种商业产品进行了机械性能、聚合转化率、收缩率以及吸水率和溶解度、耐磨性的对比评估。结果表明，在所有 SRC 组中，SRC3 表现出优异的机械性能、高聚合转化率、低收缩率、低吸水率和溶解度以及可接受的耐磨性。与商业产品相比，这种最佳的 SRC3 材料在弯曲和直径拉伸强度方面与 Z350 XT 相当，而在弯曲模量和表面硬度方面则更好。在树脂复合材料的开发中使用“致密”微混合填料系统在物理化学性能和耐磨性之间提供了平衡，这可能是复合材料产品开发的一种有前途的策略。
