Work of adhesion of resin on treated lithia disilicate-based ceramic

• Published in: Dental materials 2004-05, Vol.20 (4), p.338-344
• Main Authors: Della Bona, Alvaro, Shen, Chiayi, Anusavice, Kenneth J
• Format: Article
• Language: English
• Subjects: Acid Etching, Dental; Adhesiveness; Aluminum Silicates; Analysis of Variance; Dental Bonding - methods; Dental Porcelain; Dentistry; Dynamic contact angle; Empress ceramic; Etching; Microscopy, Electron, Scanning; Resin Cements; Silane; Silanes; Surface energy; Surface Properties; Surface Tension; Wettability
• ISSN: 0109-5641; 1879-0097
• DOI: 10.1016/S0109-5641(03)00126-X

Objective. This study is to test the hypothesis that chemical etching and silane coating of a ceramic surface will influence the work of adhesion ( W A) of adhesive resin to dental ceramic. Methods. A hot-pressed lithia disilicate-based ceramic was used as a model material to investigate the influence of probing media and surface treatments on W A using a dynamic contact angle analyzer. Eighty ceramic specimens were randomly divided into eight experimental groups and treated as follows: (1 and 3) as polished; (2 and 4) etched with 9.5% hydrofluoric acid (HF) for 1 min; (5) etched with 4% acidulated phosphate fluoride (APF) for 2 min; (6) silane coated; (7) etched with HF for 1 min and silane coated; (8) etched with APF for 2 min and silane coated. Advancing and receding contact angles ( θ a and θ r) were measured using high purity water ( γ=72.6 mN/m ) for groups 1 and 2, and a liquid resin (γ=39.7 mN/m) for groups 3–8 as probing liquids. Results. The liquid resin medium yielded a lower W A than water. Silanization produced a significantly lower W A ( p