The effect of grinding and/or airborne-particle abrasion on the bond strength between zirconia and veneering porcelain : a systematic review

Objective: The aim of the study was to make an inventory of current literature on the bondstrength between zirconia and veneering porcelain after surface treatment of zirconia by grindingwith diamond bur and/or with airborne-particle abrasion.Material and methods: The literature search for the present review was made following recommendedguidelines using acknowledged methodology on how to do a systematic review. Theelectronic databases PubMed, Cochrane Library, and Science Direct were used in the presentstudy.Results: Twelve studies were selected. Test methods used in the original studies included shearbond strength (SBS) test, tensile bond strength test, and micro-tensile bond strength test. Themajority of studies used SBS. Results showed a large variation within each surface treatment ofzirconia, using different grain size, blasting time, and pressure.Conclusions: Airborne-particle abrasion might improve the bond strength and can therefore beconsidered a feasible surface treatment for zirconia that is to be bonded. Grinding has been recommendedas a surface treatment for zirconia to improve the bond strength; however, this recommendationcannot be verified. A standardized test method and surface treatment arerequired to be able to compare the results from different studies and draw further conclusions