Evaluation of success rate of Zirconia based restorations: A systematic review

BACKGROUND: Evaluation of the different causes listed in literature for the rate of success of Zirconia based restorations. MATERIAL AND METHODS: With the help of PRISMA guidelines , this Systematic review was carried out. For a time span of 18 years that is from 2003 to 2020, articles were searched using three electronic data bases which are PubMed , Cochrane Library and Sciencedirect. The selected 27 articles which included the in vivo as well as the in vitro studies presented the performance of zirconia-based prosthetic restorations. The studies also stated the commonest reason for failure which ultimately depicted the rate of success of the fixed dental prosthesis. Due to heterogeneity of gathered information , meta analysis could not be carried out. RESULTS: Failure of bond between veneer material and zirconia sub-structure could be related to the cause of fracture of veneering porcelain hypothetically. CONCLUSIONS: Mechanical connection and building up of compressive strength due to thermal contraction at the time of cooling after sintering process is the reason for the bond developed amongst the two materials. Key words:Zirconia based restorations, zirconia failure cause.