University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra, PRD, Portugal.
Center for Microelectromechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal.
Clin Oral Investig. 2022 Sep;26(9):5575-5594. doi: 10.1007/s00784-022-04589-5. Epub 2022 Jun 29.
The objective of this study was to perform an integrative review on the effect the inorganic fillers on the light transmission through the resin-matrix composites during the light-curing procedure.
A bibliographic review was performed on PubMed using the following search terms: "fillers" OR "particle" AND "light curing" OR "polymerization" AND "light transmission" OR "light absorption" OR "light irradiance" OR "light attenuation" OR "light diffusion" AND "resin composite." The search involved articles published in English language in the last 10 years.
Selected studies reported a decrease in biaxial strength and hardness in traditional resin-matrix composites in function of the depth of polymerization. However, there were no significant differences in biaxial strength and hardness recorded along the polymerization depth of Bulk-Fill™ composites. Strength and hardness were enhanced by increasing the size and content of inorganic fillers although some studies revealed a progressive decrease in the degree of conversion on increasing silica particle size. The translucency of glass-ceramic spherical fillers promoted light diffusion mainly in critical situations such as in the case of deep proximal regions of resin-matrix composites.
The amount of light transmitted through the resin-matrix composites is influenced by the size, content, microstructure, and shape of the inorganic filler particles. The decrease of the degree of conversion affects negatively the physical and mechanical properties of the resin-matrix composites.
The type and content of inorganic fillers in the chemical composition of resin-matrix composites do affect their polymerization. As a consequence, the clinical performance of resin-matrix composites can be compromised leading to variable physical properties and degradation. The polymerization mode of resin-matrix composites can be improved according to the type of inorganic fillers in their chemical composition.
本研究旨在对无机填料对光固化过程中树脂基质复合材料透光率的影响进行综合评价。
在 PubMed 上使用以下搜索词进行文献回顾：“填料”或“颗粒”和“光固化”或“聚合”和“光传输”或“光吸收”或“光辐照度”或“光衰减”或“光扩散”和“树脂复合材料”。搜索包括在过去 10 年以英语发表的文章。
选定的研究报告称，传统树脂基质复合材料的双轴强度和硬度随聚合深度的增加而降低。然而，在 Bulk-Fill™复合材料的聚合深度上，双轴强度和硬度没有显著差异。通过增加无机填料的尺寸和含量可以提高强度和硬度，尽管一些研究表明随着二氧化硅颗粒尺寸的增加，转化率会逐渐降低。玻璃陶瓷球形填料的透光率促进了光的扩散，主要是在临界情况下，如树脂基质复合材料的近端深部。
通过树脂基质复合材料的光量受无机填料颗粒的尺寸、含量、微观结构和形状的影响。转化率的降低会对树脂基质复合材料的物理和机械性能产生负面影响。
树脂基质复合材料化学成分中无机填料的类型和含量会影响其聚合。因此，树脂基质复合材料的临床性能可能会受到影响，导致物理性能和降解程度不同。根据其化学成分中无机填料的类型，可以改善树脂基质复合材料的聚合模式。
