Clinical application and prospects of zirconia bonding agent / 中国组织工程研究

ABSTRACT

BACKGROUND: Zirconia ceramic was considered as one of the optimal materials in prosthodontics and widely used in daily clinical treatment for its features, such as aesthetic properties, biocompatibility and corrosion resistance. Ideal bond strength and durability are necessary for the restoration to achieve satisfied clinical performance. OBJECTIVE: To systematically review zirconia and common zirconia bonding agents, the physical and chemical properties of zirconia ceramics, the clinical operating process standard, the common zirconia bonding agents and their bonding performance. METHODS: We searched the articles from March 2005 to March 2020 in PubMed, CNKI, Wanfang databases with the key words of “zirconia; surface treatment; universal adhesive; self-adhesive resin cement; bonding strength” in Chinese and English. After screening according to inclusion and exclusion criteria, the final 36 included articles were summarized. RESULTS AND CONCLUSION: Zirconia has excellent physical and chemical properties with hydrophobic surface, so it is difficult to form a proper bonding surface with the substrate. At present, the combination of physical sand blasting and chemical reaction is the most common treatment. The sand blasting can effectively increase the reaction area. In the aspect of chemical bonding, the bond strength of the self-adhesive resin cement can be significantly improved by both the universal adhesive and zirconia primer after 24 hours of water storage; however, the durability of universal adhesive is better than that of zirconia primer. As common sense, 37% phosphoric acid is daily used on tooth surface before bonding procedure, which can prohibit chemical reaction to zirconia. Sand blasting was considered as one of the most practical way to physically increase the surface for 10-MDP contained primers or universal adhesives chemically reacted with zirconia.