IADR Abstract Archives
Notched-edge Shear Bond Strength of Universal Adhesives on Tooth Substrates.
Objectives: To assess the bond strength on enamel and dentin of novel Universal adhesives in combination with a resin composite.
Methods: Six Universal adhesive/composite combinations were tested: OptiBond eXTRa Universal (KavoKerr; O); AdheSE Universal (Ivoclar; A); Clearfil Universal Bond Quick (Kuraray; C); Scotchbond Universal (3M; S); Prime&Bond Elect (Dentsply; P), Futurabond U (Voco; F). All the adhesive systems were tested in combination with Harmonize resin composite (KavoKerr).
The bond strength to enamel and to dentin was measured with the notched-edge shear bond strength test (ISO 29022/2013). Extracted molars were sectioned with a low-speed saw to obtain 3mm thick slices. The slices were positioned on one side of a cylindrical mold of 25mm in diameter, 25mm height, and hold in position with a self-adhesive tape. Acrylic resin was then poured from the opposite side of the cylindrical mold, so that one side of the tooth slice was exposed at the surface. A clinically relevant smear layer was created by grinding with a wet 600-grit SiC paper. The bonding procedure was then performed according to the manufacturers’ instructions. After the bonding procedure, the specimens were inserted in a bonding clamp. The resin composite was layered into the hole of the bonding mold insert to obtain 1.2mm diameter cylinders bonded onto the tooth slice surface. The resin composite was then cured for 20s. After removal from the mold, the specimens were stored for 24 hours and then tested in a UltraTester Machine (Ultradent). The bond strengths were recorded in MPa, and then were statistically analyzed for enamel and for dentin (Kolmogorov-Smirnov test, Levene test, One-Way Analysis of Variance, Tukey test at p<0.05 level of significance).
Results: The following bond strengths were recorded in MPa (mean±standard deviation)
Enamel (p<0.001): O 33.2±3.8a; S 24.3±2.1b; A 22.4±3.9bc; P 21.0±3.6bc; C 19.4±2.7c; F 17.4±3.0c.
Dentin (p<0.001): O 43.1±3.3a; A 34.2±2.5b; S 33.7±4.2b; F 31.8±1.3b; C 31.2±2.6b; P 26.8±1.5c
Conclusions: OptiBond eXTRa Universal achieved statistically significant higher bond strength than all the other materials tested, both on enamel and dentin substrates.
Methods: Six Universal adhesive/composite combinations were tested: OptiBond eXTRa Universal (KavoKerr; O); AdheSE Universal (Ivoclar; A); Clearfil Universal Bond Quick (Kuraray; C); Scotchbond Universal (3M; S); Prime&Bond Elect (Dentsply; P), Futurabond U (Voco; F). All the adhesive systems were tested in combination with Harmonize resin composite (KavoKerr).
The bond strength to enamel and to dentin was measured with the notched-edge shear bond strength test (ISO 29022/2013). Extracted molars were sectioned with a low-speed saw to obtain 3mm thick slices. The slices were positioned on one side of a cylindrical mold of 25mm in diameter, 25mm height, and hold in position with a self-adhesive tape. Acrylic resin was then poured from the opposite side of the cylindrical mold, so that one side of the tooth slice was exposed at the surface. A clinically relevant smear layer was created by grinding with a wet 600-grit SiC paper. The bonding procedure was then performed according to the manufacturers’ instructions. After the bonding procedure, the specimens were inserted in a bonding clamp. The resin composite was layered into the hole of the bonding mold insert to obtain 1.2mm diameter cylinders bonded onto the tooth slice surface. The resin composite was then cured for 20s. After removal from the mold, the specimens were stored for 24 hours and then tested in a UltraTester Machine (Ultradent). The bond strengths were recorded in MPa, and then were statistically analyzed for enamel and for dentin (Kolmogorov-Smirnov test, Levene test, One-Way Analysis of Variance, Tukey test at p<0.05 level of significance).
Results: The following bond strengths were recorded in MPa (mean±standard deviation)
Enamel (p<0.001): O 33.2±3.8a; S 24.3±2.1b; A 22.4±3.9bc; P 21.0±3.6bc; C 19.4±2.7c; F 17.4±3.0c.
Dentin (p<0.001): O 43.1±3.3a; A 34.2±2.5b; S 33.7±4.2b; F 31.8±1.3b; C 31.2±2.6b; P 26.8±1.5c
Conclusions: OptiBond eXTRa Universal achieved statistically significant higher bond strength than all the other materials tested, both on enamel and dentin substrates.