Abstract：
Severe tooth wear is related to substantial loss of tooth structure, with dentin exposure and significant loss (≥1/3) of the clinical crown. The objective of this systematic review was to summarize and analyze the scientific evidence regarding the mechanical performance of computer-aided design/computer-aided manufacturing (CAD/CAM) composite resin and CAD/CAM lithium disilicate ceramic occlusal veneers, in terms of fatigue and fracture resistance, on severely worn posterior teeth. Currently, occlusal veneers are an alternative for treating worn posterior teeth. Although scientific evidence demonstrates the good performance of lithium disilicate occlusal veneers, there are less brittle materials with a modulus of elasticity more similar to dentin than ceramics, such as resin CAD/CAM blocks. Therefore, it is important to identify which type of material is best for restoring teeth with occlusal wear defects and which material can provide better clinical performance. This review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A comprehensive search of the PubMed, Embase, Web of Science, Scopus, Cochrane, OpenGrey, Redalyc, DSpace, and Grey Literature Report databases was conducted and supplemented by a manual search, with no time or language limitations, until January 2022. We aimed to identify studies evaluating the fatigue and fracture resistance of CAD/CAM composite resin and ceramic occlusal veneers. The quality of the full-text articles was evaluated according to the modified Consolidated Standards of Reporting Trials (CONSORT) criteria for in vitro studies, and 400 articles were initially identified. After removing duplicates and applying the selection criteria, 6 studies were included in the review. The results demonstrated that the mechanical performance of CAD/CAM composite resin occlusal veneers is comparable to that of CAD/CAM lithium disilicate occlusal veneers in terms of fatigue and fracture resistance.
摘要：
严重的牙齿磨损与牙齿结构的大量损失有关，牙本质暴露和临床冠的显着损失（≥1/3）。本系统综述的目的是总结和分析有关计算机辅助设计/计算机辅助制造（CAD/CAM）复合树脂和CAD/CAM二硅酸锂陶瓷咬合贴面的机械性能的科学证据，在抗疲劳和抗断裂方面，严重磨损的后牙。目前,咬合贴面是治疗磨损的后牙的替代方法。尽管科学证据证明了二硅酸锂咬合贴面的良好性能，有一些脆性较小的材料，其弹性模量比陶瓷更类似于牙本质，如树脂CAD/CAM块。因此,重要的是确定哪种材料最适合修复咬合磨损缺陷的牙齿，哪种材料可以提供更好的临床性能。这项审查是根据系统审查和荟萃分析（PRISMA）指南的首选报告项目进行的。对PubMed的全面搜索，Embase,WebofScience,Scopus,科克伦,OpenGrey,Redalyc,DSpace,进行了灰色文献报告数据库，并通过手动搜索进行了补充，没有时间或语言限制，直到2022年1月。我们旨在确定评估CAD/CAM复合树脂和陶瓷咬合贴面的疲劳和抗断裂性的研究。根据修改后的体外研究综合报告标准（CONSORT）标准评估全文文章的质量，最初确定了400篇文章。删除重复项并应用选择标准后，该综述包括6项研究。结果表明，在疲劳和抗断裂性方面，CAD/CAM复合树脂咬合贴面的机械性能与CAD/CAM焦硅酸锂咬合贴面相当。
