Innovative surface treatments for improved ceramic bonding: Lithium disilicate glass ceramic

• Published in: International journal of adhesion and adhesives Vol. 82; pp. 60 - 66
• Main Authors: Lanza, Marcos Daniel Septímio, Rodrigues Lanza, Flavia Juliani Souza, Manso, Adriana Pigozzo, Matinlinna, Jukka Pekka, Carvalho, Ricardo Marins
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.04.2018; Elsevier BV
• Subjects: Acrylic resins; Adhesion; Adhesive bonding; Adhesive strength; Bond strength; Bonding strength; Ceramic bonding; Ceramics; Distilled water; Glass ceramics; Hydrofluoric acid; Lithium; Lithium disilicate; Pretreatment; Resin cement; Shear strength; Silane; Silanes; Silanization; Strength testing; Surface treatment; Thermal plasmas; Resin cement; Bond strength; Silanization; Lithium disilicate; Adhesion; Silane
• ISSN: 0143-7496; 1879-0127
• DOI: 10.1016/j.ijadhadh.2017.12.007

To investigate the effect of novel surface treatments on adhesion (shear bond) strength of a self-adhesive resin cement to lithium disilicate glass ceramic (LD). A total of 336 LD (IPS e.maxCAD, Ivoclar-Vivadent) specimens (7mm × 7mm × 2.0mm) were embedded in acrylic resin, wet-ground on 180 and 400 SiC papers for 20s, ultrasonicated in distilled water for 10min and air-dried. Samples were randomly divided into 4 study groups according to surface treatment: 5% hydrofluoric acid/20s (HF); non-thermal plasma/20s (NTP); 5% hydrofluoric acid/20s plus non-thermal plasma/20s; no treatment (NT). Each group was divided into 7 sub-groups (n = 12) for silanization with 4 experimental silane primers, 2 commercially available primers or no silanization (control). The specimens were assembled for shear bond strength testing (Ultradent Bonding Assembly), bonded with resin cement (Speed CEM, Ivoclar-Vivadent) and light cured (Bluephase Style@1.100mW/cm2, Ivoclar-Vivadent) for 20s. Specimens were tested after 24h and 90 days storage in water at 37°C. Data were analyzed by 3-Way Anova and Tukey test (α = 5%). In general, bond strength values for acryloyl- and styryl-functional silane primers were significantly higher than the other types of silanes. Storage significantly affected the adhesion (bond) strength for most of the groups (p < 0.001). Higher adhesion (bond) strengths to LD appear to be a result of a proper combination of surface treatment and silanization. Increased adhesion strength to lithium disilicate glass ceramic can be obtained with some experimental silane primers combined with HF surface pretreatment.