Citation Information :
Abdulateef S, AlFallaj H, Alzahrani SJ, Ahmed WM. Effect of Different Veneering Techniques on the Mechanical Failure of Tooth-supported Veneered Zirconia Crowns: A Systematic Review. Int J Prosthodont Restor Dent 2022; 12 (2):77-87.
Purpose: To assess the influence of different veneering techniques on the mechanical failure of tooth-supported veneered zirconia crowns.
Materials and methods: An electronic literature search of PubMed, MEDLINE, SCOPUS, and Web of Science databases for relevant publications up to December 2021 was performed using the following MeSH combinations: zirconia, veneers, layering, pressing, computer-assisted design-on (CAD-on), clinical, in vitro, and crown. The focus of this study was to determine which layering technique in a single zirconia crown has the least mechanical complications according to the well-established PICO strategy. Titles and abstracts were screened to select studies based on the set criteria.
Results: Of the 1,834 studies, 42 were selected for full-text reading and 12 of these met the inclusion criteria. All selected articles were in vitro studies. Among the veneering techniques, controversial findings were noted for pressed vs layered ceramic, whereas the CAD-on group showed significantly less chipping. The CAD-on technique using fused lithium disilicate layering ceramic exhibited superior mechanical performance with single crown-layered zirconia restorations over all other materials and techniques.
Conclusions: Veneering techniques influence the mechanical performance of tooth-supported veneered zirconia restorations, with the advantage of the CAD-on-fused lithium disilicate technique. The findings are mainly supported by in vitro studies on single-crown restorations. Nevertheless, the clinical evidence regarding which veneering technique has better performance was inconclusive, and it suggests that all methods were adequate for clinical use.
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