Many attempts have been made to develop a simple, efficient, and inexpensive method for the intraoral repair of fractured esthetic veneers of crowns or pontics. However, the results are not predictable, especially when alloy surfaces are exposed to the oral environment. The aim of this in vitro study was to evaluate a new method for repairing fractured veneers intraorally by blasting the surfaces with 30 mu m aluminum oxide grains coated with SiO2 (Co-Jet(R)) using an intraoral alumina blaster before bonding with the repair resin. Sample surfaces of three different alloys and an alloy with resin or ceramic veneer layers were blasted with Co-Jet(R) particles, using an intraoral alumina blaster (Microetcher(R)). Samples were treated with specific silane solutions, opaquers (alloy samples), or bonding agents (veneered samples) and then bonded to two bisphenol-A glycidyl methacrylate repair resins. Shear bond strengths were determined after storage in water and after thermocycling resins. The results indicated that coating by the Co-Jet(R) /Microetcher(R) system increased the bond strength compared with surfaces abraded with aluminum oxide (control group). The highest mean bond strengths were recorded for repaired resin veneered samples (17.7 MPa) and Co/Cr and ceramic substrate samples (13 MPa). The results of this study suggest that coating with an intraoral alumina blaster offers the dentist the opportunity of a direct, chair-side repair of fractured porcelain and resin veneers with silica coating.