Abstract
Objective: 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).
Materials and methods: A total of 336 LD (IPS e.maxCAD, Ivoclar-Vivadent) specimens (7 mm × 7 mm × 2.0 mm) were embedded in acrylic resin, wet-ground on 180 and 400 SiC papers for 20 s, ultrasonicated in distilled water for 10 min and air-dried. Samples were randomly divided into 4 study groups according to surface treatment: 5% hydrofluoric acid/20 s (HF); non-thermal plasma/20 s (NTP); 5% hydrofluoric acid/20 s plus non-thermal plasma/20 s; 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 [email protected] mW/cm2, Ivoclar-Vivadent) for 20 s. Specimens were tested after 24 h and 90 days storage in water at 37 °C. Data were analyzed by 3-Way Anova and Tukey test (α = 5%).
Results: 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.
Significance: Increased adhesion strength to lithium disilicate glass ceramic can be obtained with some experimental silane primers combined with HF surface pretreatment.
Materials and methods: A total of 336 LD (IPS e.maxCAD, Ivoclar-Vivadent) specimens (7 mm × 7 mm × 2.0 mm) were embedded in acrylic resin, wet-ground on 180 and 400 SiC papers for 20 s, ultrasonicated in distilled water for 10 min and air-dried. Samples were randomly divided into 4 study groups according to surface treatment: 5% hydrofluoric acid/20 s (HF); non-thermal plasma/20 s (NTP); 5% hydrofluoric acid/20 s plus non-thermal plasma/20 s; 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 [email protected] mW/cm2, Ivoclar-Vivadent) for 20 s. Specimens were tested after 24 h and 90 days storage in water at 37 °C. Data were analyzed by 3-Way Anova and Tukey test (α = 5%).
Results: 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.
Significance: Increased adhesion strength to lithium disilicate glass ceramic can be obtained with some experimental silane primers combined with HF surface pretreatment.
| Original language | English |
|---|---|
| Pages (from-to) | 60-66 |
| Number of pages | 7 |
| Journal | International Journal of Adhesion and Adhesives |
| Volume | 82 |
| Early online date | 15 Dec 2017 |
| DOIs | |
| Publication status | Published - Apr 2018 |
Keywords
- adhesion
- bond strength
- lithium disilicate
- resin cement
- silane
- silanization