1. Adhesive Strength Between a Nickel-Chromium Alloy and a Resin Cement Subjected to Different Surface Treatments.
- Author
-
Sandoval Sandoval, Ana Gabriela and Cascante Calderón, Marcelo Geovanny
- Subjects
- *
NICKEL-chromium alloys , *SURFACE preparation , *ADHESIVES , *CEMENT , *THERMOCYCLING - Abstract
Background: The constant need to improve adhesive systems leads manufacturers to develop new materials that offer optimal results. Manufacturers claim that new adhesives produce a strong and durable bond between resin cements and restorative materials including metals. Purpose: To measure the adhesive resistance between a resin cement and a nickel-chromium (Ni-Cr) alloy at 24 hours and after aging. Methods: This was an in vitro experimental study. 40 Ni-Cr metallic cylinders were assigned to 4 groups (n=10). The surfaces were mechanically sanded and abraded with 50 µm Al2O3 particles (mechanical surface treatment). The chemical surface treatment included a metallic primer, silane, and universal adhesive. Subsequently, two cubes of nanohybrid resin were cemented to each metal cylinder with resin cement, under a constant load of 0.98 N for 5 minutes. An immediate shear test (24 hours) and after aging (5,000 thermal cycles) was carried out. Results: The highest values of adhesive resistance were obtained with the GSUNIVERSAL group both when it was measured immediately and when aged. Conclusions: The mechanical and chemical treatment based on 10-MDP plus silane improved the adhesion between a Ni-Cr alloy and a resin cement, even after aging. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF