Effect of silica coating combined to a MDP-based primer on the resin bond to Y-TZP ceramic.
The aim of this study was to evaluate the influence of silica coating and 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-based primer applications upon the bonding durability of a MDP-based resin cement to a yttrium stabilized tetragonal zirconia (Y-TZP) ceramic. Ninety-six Y-TZP tabs were embedded in an acrylic resin (free surface for adhesion: 5 × 5 mm(2)), ground finished and randomly divided into four groups (N = 24) according to the ceramic surface conditioning: (1) cleaning with isopropanol (ALC); (2) ALC + phosphoric acid etching + MDP-based primer application (MDP-primer); (3) silica coating + 3-methacryloyloxypropyl trimethoxysilane (MPS)-based coupling agent application (SiO2 + MPS-Sil); and (4) SiO2 + MDP-primer. The MDP-based resin cement was applied on the treated surface using a cylindrical mold (diameter= 3 mm). Half of the specimens from each surface conditioning were stored in distilled water (37 °C, 24 h) before testing. Another half of the specimens were stored (90 days) and thermo-cycled (12,000 x) during this period (90 d/TC) before testing. A shear bond strength (SBS) test was performed at a crosshead speed of 0.5 mm/min. Two factors composed the experimental design: ceramic conditioning strategy (in four levels) and storage condition (in two levels), totaling eight groups. After 90 d/TC (Tukey; p < 0.05), SiO2 + MDP-primer (24.40 MPa) promoted the highest SBS. The ALC and MDP-primer groups debonded spontaneously during 90 d/TC. Bonding values were higher and more stable in the SiO2 groups. The use of MDP-primer after silica coating increased the bond strength.
May
Liliana Gressler
LG
São Jose dos Campos Dental School, São Paulo State University (UNESP), SP, Brazil.
Passos
Sheila Pestana
SP
Capelli
Diana Barca
DB
Ozcan
Mutlu
M
Bottino
Marco Antonio
MA
Valandro
Luiz Felipe
LF
D020099:Coated Materials, Biocompatible / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods* / Q000592:standards; D008422:Materials Testing / Q000379:methods; D008689:Methacrylates / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry* / Q000494:pharmacology; D015019:Yttrium; D015040:Zirconium
D020099:Coated Materials, Biocompatible; C074230:MDP adhesion promoting monomer; D008689:Methacrylates; D009943:Organophosphorus Compounds; D019279:Resin Cements; C499362:yttria stabilized tetragonal zirconia; D015019:Yttrium; D012822:Silicon Dioxide; D015040:Zirconium