David-Pérez Melissa, Ramírez-Suárez Juan P, Latorre-Correa Federico, Agudelo-Suárez Andrés A
Facultad de Odontología, Universidad de Antioquia. Medellín, Colombia.
J Prosthodont Res. 2022 Jul 30;66(3):385-394. doi: 10.2186/jpr.JPR_D_20_00090. Epub 2021 Dec 1.
This systematic review synthesized and analyzed the scientific evidence on the degree of conversion (DC) obtained by Fourier-transform infrared spectroscopy (FTIR) of light-cured and dual-cured resinous cements, photopolymerized under different thicknesses of vitreous ceramics.
The study protocol of this systematic review was registered at the International Prospective Register of Systematic Reviews (PROSPERO) (CRD42017069319). A comprehensive search (PubMed/MEDLINE, Scopus, EMBASE, and LILACS) was performed for papers including an in vitro design and indexed from January 2007 to December 2020 according to the study purposes. A quality appraisal (specific instrument) and descriptive analysis of the articles that met the inclusion criteria were conducted.
Nine included studies were analyzed. Two of them used feldspathic ceramics, six used lithium disilicate, and one used both (comparing different types and opacities of ceramics). Three studies found a higher DC in dual cements, while one did not find any significant differences, and five studies found a higher DC in light-cured resin cements. Light-cured cements showed a better DC in relation to dual-cured cements in vitreous ceramic restorations with thicknesses up to 2 mm.
According to the findings, the use of good photoactivation is the most relevant variable to achieve an adequate DC in light-cured and dual-cured resin cements. The use of vitreous ceramic restorations with a thickness of less than 2 mm (light-curing cements) shows a better DC. Standardized in vitro studies are required to generate accurate scientific evidence.
本系统评价综合并分析了关于在不同厚度的玻璃陶瓷下光固化和双重固化树脂水门汀经傅里叶变换红外光谱法（FTIR）获得的固化程度（DC）的科学证据。
本系统评价的研究方案已在国际系统评价前瞻性注册库（PROSPERO）（CRD42017069319）中注册。根据研究目的，对2007年1月至2020年12月期间索引的包括体外设计的论文进行了全面检索（PubMed/MEDLINE、Scopus、EMBASE和LILACS）。对符合纳入标准的文章进行了质量评估（特定工具）和描述性分析。
分析了9项纳入研究。其中2项使用了长石质陶瓷，6项使用了二硅酸锂，1项同时使用了两者（比较不同类型和不透明度的陶瓷）。3项研究发现双重固化水门汀的DC更高，而1项未发现任何显著差异，5项研究发现光固化树脂水门汀的DC更高。在厚度达2 mm的玻璃陶瓷修复体中，光固化水门汀相对于双重固化水门汀显示出更好的DC。
根据研究结果，良好的光活化应用是在光固化和双重固化树脂水门汀中实现足够DC的最相关变量。使用厚度小于2 mm的玻璃陶瓷修复体（光固化水门汀）显示出更好的DC。需要进行标准化的体外研究以产生准确的科学证据。
