IADR Abstract Archives
Surface Treatment on Shear Bond Strength of High Translucent Zirconia
Objectives: The aim of this investigation was to evaluate bonding opportunities to high translucent zirconia after different surface treatments.
Methods: Shear bond strength was determined between high translucent zirconia plates (Lava™ Esthetic, 3M Oral Care, USA; 2mm, 20mm, 10mm) and CoCr cylinders (d= 5mm, height 3mm). Bonding was performed after different activation and cleaning procedures of the plates. Standard zirconia (Lava Plus, 3M) served as a reference. Zirconia in all cases was sandblasted (40µm aluminium oxide, 2bar). Cements: RelyX™ Unicem 2, ReyX Ultimate (both 3M) and Multilink® Automix (Ivoclar-Vivadent; FL). Bondings: Scotchbond™ Universal (3M), Monobond + (Ivoclar). Cleaning was performed with alcohol, NaOCl or water. Individual surfaces were contaminated with human saliva. After 24h, TC (12000x 5°C/55°C) and 90d storage (37°C) shear bond strength (SBS) was determined (ISO TR 11405; v=1mm/min, n=10). Bonding areas were classified into adhesive, mixed and cohesive failure. Statistics: mean and standard deviation; one-way ANOVA / Bonferroni (α=0.05).
Results: Shear bond strength after 24hrs varied between 3.5 MPa (#4) and 69.4 MPa (#14). After TC values between 0.0 MPa (#4, no bonding) and 70.3 MPa (5) were found. After 90 days storage the lowest SBS values were found for #4 (0.0 MPa) and highest results for #7 (75.7 MPa). Detailed results see table. The statistical comparison revealed significant differences between the systems. Dominate failure pattern was adhesive.
Conclusions: The use of self-etching cement or adhesive bonding together with cleaning and decontamination guaranteed efficient bonding to translucent zirconia Lava Esthetic. Project was sponsored by 3M.
Methods: Shear bond strength was determined between high translucent zirconia plates (Lava™ Esthetic, 3M Oral Care, USA; 2mm, 20mm, 10mm) and CoCr cylinders (d= 5mm, height 3mm). Bonding was performed after different activation and cleaning procedures of the plates. Standard zirconia (Lava Plus, 3M) served as a reference. Zirconia in all cases was sandblasted (40µm aluminium oxide, 2bar). Cements: RelyX™ Unicem 2, ReyX Ultimate (both 3M) and Multilink® Automix (Ivoclar-Vivadent; FL). Bondings: Scotchbond™ Universal (3M), Monobond + (Ivoclar). Cleaning was performed with alcohol, NaOCl or water. Individual surfaces were contaminated with human saliva. After 24h, TC (12000x 5°C/55°C) and 90d storage (37°C) shear bond strength (SBS) was determined (ISO TR 11405; v=1mm/min, n=10). Bonding areas were classified into adhesive, mixed and cohesive failure. Statistics: mean and standard deviation; one-way ANOVA / Bonferroni (α=0.05).
Results: Shear bond strength after 24hrs varied between 3.5 MPa (#4) and 69.4 MPa (#14). After TC values between 0.0 MPa (#4, no bonding) and 70.3 MPa (5) were found. After 90 days storage the lowest SBS values were found for #4 (0.0 MPa) and highest results for #7 (75.7 MPa). Detailed results see table. The statistical comparison revealed significant differences between the systems. Dominate failure pattern was adhesive.
Conclusions: The use of self-etching cement or adhesive bonding together with cleaning and decontamination guaranteed efficient bonding to translucent zirconia Lava Esthetic. Project was sponsored by 3M.
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