Effect of sandblasting on surface roughness of zirconia-based ceramics and shear bond strength of veneering porcelain

• Published in: Dental Materials Journal Vol. 33; no. 6; pp. 778 - 785
• Main Authors: HE, Min, ZHANG, Zutai, ZHENG, Dongxiang, DING, Ning, LIU, Yan
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 2014; Japanese Society for Dental Materials and Devices
• Subjects: Ceramics - chemistry; Dental Bonding; Dental Etching - methods; Dental Porcelain - chemistry; Dental Stress Analysis; Dental Veneers; Dentistry; Materials Testing; Microscopy, Electron, Scanning; Sandblasting; Shear Strength; Surface Properties; Veneering porcelain; X-Ray Diffraction; Zirconia; Zirconium - chemistry
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2014-002

This study aims to investigate the effect of sandblasting on the surface roughness of zirconia and the shear bond strength of the veneering porcelain. Pre-sintered zirconia plates were prepared and divided into four groups. Group A were not treated at all; group B were first sandblasted under 0.2 MPa pressure and then densely sintered; group C and D were sintered first, and then sandblasted under 0.2 MPa and 0.4 MPa pressures respectively. Surface roughness was measured and 3D roughness was reconstructed for the specimens, which were also analyzed with X-ray diffractometry. Finally after veneering porcelain sintering, shear bond tests were conducted. Sandblasting zirconia before sintering significantly increased surface roughness and the shear bond strength between zirconia and veneering porcelain (p<0.05). Sandblasting zirconia before sintering is a useful method to increase surface roughness and could successfully improve the bonding strength of veneering porcelain.