Examination of bond strength and mechanical properties of Y-TZP zirconia ceramics with different surface modifications.
The purpose of our study was to evaluate the effects of surface modifications on the bond strength between veneering porcelains and Yttria-stabilized tetragonal zirconia (Y-TZP). In a bond strength tests, the effect of control, 70 µm alumina-sandblasting, 30 µm and 110 µm silica-coating of the Y-TZP surface on bonding were evaluated with veneering porcelains. In addition, the effect of surface modification on the flexural strength of Y-TZP was also evaluated. The data was analyzed using one-way ANOVA and Tukey test. All specimens showed bond strength values in excess of 25 MPa, the minimum allowed by ISO9693. In addition, significantly differences were found between the control and the 30 µm silica-coated. On the other hand the flexural strength of Y-TZP does not significantly difference for any surface modification. These results indicate that silica-coating may provide an effective pre-treatment for this enhancement of the bond strength while maintaining the strength of Y-TZP.
Division of Removable Prosthetics, Department of Oral and Maxillofacial Rehabilitation, Kanagawa Dental College, Yokosuka, Kanagawa, Japan.
Hiroaki
H
Yamaguchi
Satoshi
S
Ino
Naho
N
Hamano
Shusaku
S
Okada
Toshio
T
Teranaka
D000537:Aluminum Oxide; D020099:Coated Materials, Biocompatible; D018360:Crystallography, X-Ray; D001840:Dental Bonding; D003776:Dental Porcelain; D003801:Dental Veneers; D004577:Electron Probe Microanalysis; D055595:Mechanical Phenomena; D010316:Particle Size; D018583:Pliability; D012822:Silicon Dioxide; D013499:Surface Properties; D015019:Yttrium; D015040:Zirconium
D020099:Coated Materials, Biocompatible; C499362:yttria stabilized tetragonal zirconia; D003776:Dental Porcelain; D015019:Yttrium; D012822:Silicon Dioxide; D015040:Zirconium; D000537:Aluminum Oxide