OBJECTIVE: To develop highly effective bonding agent (primer) for Zirconia surface. METHODS: A new experimental primer (B-EXP) (Bisco) was formulated and its bonding ability was compared to commercially available zirconia-bonding agents, i.e. Metal/Zirconia Primer (IV-MZP) (Ivoclar Vivadent) and Clearfil Ceramic Primer (K-CCP) (Kuraray). The zirconia (Cercon Type) was sandblasted by aluminum (50 µm), then cleaned by DI water and dried. Then zirconia surface was applied primers according to manufacturing instructions. Duolink (Bisco), Choice 2 (Bisco), Panavia F2.0 (manufacturer recommended, Kuraray), or Multilink Automix (manufacturer recommended, Ivoclar Vivadent) was placed into a #5 gel cap (area 0.1684 cm2), and light-cured for 20 seconds in each side (4 sides totally). Cured specimens were stored for 24 hours at 37º C in DI water and tested until failure using a universal tester (Instron 4466) at a speed of 5 mm/min. RESULTS:
Shear Bond Strength, MPa (SD), n = 9~14
Primer |
| Cement |
|
|
| Panavia F2.0 | Multilink | Choice 2 | Duolink |
K-CCP | 7.48 (0.89) | / | 8.16 (2.78) | 9.34 (1.91) |
IV-MZP | / | 2.73 (2.36) | 5.71 (3.22) | 3.84 (2.57) |
B-EXP | 17.22 (1.98) | 15.56 (3.58) | 16.63 (2.48) | 15.80 (2.66) |