IADR Abstract Archives
Effects of Surface Treatment of Zirconium Oxide Ceramic on Shear Bond Strenght to Resin Composite, an In Vitro Study
Objectives: This study compares the bond strength of resin cement and yttrium-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramic with different surface conditioning methods.
Methods: 80 presintered Y-TZP ceramic specimens were prepared (10 mm diameter, 3mm thickness ) and were randomly assigned to eight groups as control (Group 1, no conditioning); laser (Group 2, Ytterbium laser irradiation treated); sandblasted (Group 3, airabrasion with 50um Al2O3); laser and sandblasted (Group 4); acid etching (Group 5, etching with %8 Hydroflouric acid); laser and acid etching (Group 6); sandblasted and acid etching (Group 7); laser and sandblasted and acid etching (Group 8). After preparation of specimens, composite resin cylinders (Filtek™ Z550, 3M Espe, St. Paul MN, USA) were prepared and were cemented with resin cement (RelyX U 200, 3M Espe, St. Paul MN, USA) on the ceramic surfaces. After that the specimens were kept in an incubator at 36,5 C for 24 hours. All specimens were tested for shear bond strength at an universal testing machine. Two specimens of each group were randomly selected for scanning electron microscopy evaluation. Results monitorized for statistical analysis.
Results: Statistical analyses of obtained data were evaluated by The Kruskal-Wallis Test and descriptive statistics. Following results were observed: for all tested groups, Ytterbium laser irradiation treated and sandblasted (group 4) showed significantly highest shear bond strength (Values of median was 11,0940) and %8 hydrofluoric acid (group 5) showed lowest (Values of median was 5,3880). At the end of the comparison with the control group, only group 4 showed significant affect on shear bond strength (p=0,001).
Conclusions: This research revealed that shear bond strenght is affected by the surface treatment. Although laser, sandblast and combination treatments shows significant effect on shear bond strength, the acid etching shows no significance.
Methods: 80 presintered Y-TZP ceramic specimens were prepared (10 mm diameter, 3mm thickness ) and were randomly assigned to eight groups as control (Group 1, no conditioning); laser (Group 2, Ytterbium laser irradiation treated); sandblasted (Group 3, airabrasion with 50um Al2O3); laser and sandblasted (Group 4); acid etching (Group 5, etching with %8 Hydroflouric acid); laser and acid etching (Group 6); sandblasted and acid etching (Group 7); laser and sandblasted and acid etching (Group 8). After preparation of specimens, composite resin cylinders (Filtek™ Z550, 3M Espe, St. Paul MN, USA) were prepared and were cemented with resin cement (RelyX U 200, 3M Espe, St. Paul MN, USA) on the ceramic surfaces. After that the specimens were kept in an incubator at 36,5 C for 24 hours. All specimens were tested for shear bond strength at an universal testing machine. Two specimens of each group were randomly selected for scanning electron microscopy evaluation. Results monitorized for statistical analysis.
Results: Statistical analyses of obtained data were evaluated by The Kruskal-Wallis Test and descriptive statistics. Following results were observed: for all tested groups, Ytterbium laser irradiation treated and sandblasted (group 4) showed significantly highest shear bond strength (Values of median was 11,0940) and %8 hydrofluoric acid (group 5) showed lowest (Values of median was 5,3880). At the end of the comparison with the control group, only group 4 showed significant affect on shear bond strength (p=0,001).
Conclusions: This research revealed that shear bond strenght is affected by the surface treatment. Although laser, sandblast and combination treatments shows significant effect on shear bond strength, the acid etching shows no significance.