Surface treatment of alloys for resin adhesion: an in-vitro study

Successful adhesive dentistry is reliant on the strength and durability of the resin-bond. This is affected by the alloy and its preparation, the properties of the luting resin, and the condition of the tooth. This in-vitro study investigated three months of preparation of the alloy surfaces and three different types of one resin luting cement. Results demonstrated that alumina-blasted nickel-chromium alloy specimens were significantly more resistant to failure under tensile loading than gold alloy samples however prepared. Alumina-blasted, heat-treated gold alloy specimens showed significantly higher tensile failure loads than those of alumina-blasted gold. The performance of the different resins with the alumina-blasted nickel-chromium or the alumina-blasted, heat-treated gold alloy specimens was similar. However, for the alumina-blasted gold alloy specimens, there was a significant difference when comparing resin types.