Indication of Glass-Ceramics Enriched with Lithium Disilicates: Systematic Review of the Literature

Introduction: Lithium disilicate is a popular restorative material, frequently used for aesthetic and functional rehabilitation due to its mechanical and aesthetic properties as well as its ease of implementation. However, this material also has certain limitations. The purpose of this systematic review is to submit the indications for lithium disilicate restorations to the judgment of the scientific evidence. Materials and Methods: This systematic review adopted the guidelines of PRISMA (Preferred Reporting Items for Systematic Reviews and MetaAnalysis), followed the Guide of Cochrane Diagnostic Test Accuracy Protocol and reviews. An electronic search was performed in 3 databases (MEDLINE-PubMed, EMBASE-Science Direct, Cochrane Library) for studies published between 2011 and 2021 using the appropriate terms and keywords. The selected studies were filtered by title, abstract and full text. Results: From 609 publications identified, 16 were deemed relevant, and met the eligibility criteria. Of a total of 33,295 fixed restorations placed in more than 7427 patients, this review investigated the indications for lithium disilicate according to the type of restoration, the mode of coating, and also examined the association between the indications for this glass-ceramic and location and method of assembly of prosthetic restorations. Discussion: The results of this review will be compared with each other and with other publications. The methodology of the work, including the choice of inclusion criteria and the limits of this review. Conclusion: Indications of lithium disilicate can be used anterior and posteriorly: Veneers, single crowns, Crowns on the implant, Onlays and Inlays. The limits of lithium disilicate will be bonded and cemented bridges, especially for posterior restorations. For coating mode, monolithic restorations seem to be better than bilayer ones. For single crowns, posteriorly, lithium disilicate must be used with caution if the occlusion is judged to be unfavourable. In the anterior, there is no worry. Posterior bridges should be avoided. Anterior bridges can be used but rigorously. Although this ceramic has proven itself, the appearance of new generations of lithium disilicate makes it possible to extend its field of application even further. It tends to make it a material capable of responding to the vast majority of clinical situations to which we are dealing