Effect of preliminary treatment of the dentin surface on the shear bond strength of resin composite to dentin.
This study evaluated the effect of two dentin disinfectants (Consepsis, Tubulicid), one aqueous HEMA solution (Aqua Prep), a combination of Aqua Prep and Tubulicid and an air abrasion treatment (50 microns aluminum oxide) on the shear bond strength (SBS) of two acetone-based single bottle adhesives (One Step and Prime & Bond 2.1). The occlusal surfaces of 167 freshly extracted human third molars were ground flat to expose the dentin, then polished with a 600 grit-polishing disc. The teeth were randomly assigned to 12 test groups (two bonding agents, six pretreatment protocols). The exposed dentin was etched with 35% phosphoric acid for 20 seconds, rinsed and briefly (1-2 seconds) air dried. Six pretreatment protocols were then applied. The air abrasion groups were exceptional, as etching was carried out only after pretreatment. One Step, or Prime & Bond 2.1 was applied according to the manufacturer's instructions. Cylinders of Z-100 composite were bonded to the flat dentin surfaces by transparent gelatin capsules. Specimens were thermocycled in water baths between 5 degrees and 55 degrees C, then sheared in an Instron Testing Machine. One-way and two-way ANOVA and Tukey HSD post-hoc tests were used for statistical analysis. In the One Step group, Consepsis yielded a significantly higher SBS (17.8 MPa) than air abrasion (9.5 MPa), Control (11.8 MPa) and Aqua Prep + Tubilicid (11.9 MPa), and a comparable SBS with Tubilicid (12.5 MPa) and Aqua Prep (14.8 MPa). In the Prime & Bond 2.1 group, Aqua Prep (24.9 MPa) showed a significantly higher SBS than all other groups: air abrasion (9.3 MPa), Control (9.97 MPa), Tubilicid (12.2 MPa), Consepsis (13.0 MPa) and Tubilicid + Aqua Prep (13.3 MPa).
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Department of Prosthetic Dentistry, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
Cardash
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Oz-Ari
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B
Ben-Amar
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A
D000096:Acetone; D020906:Air Abrasion, Dental; D000537:Aluminum Oxide; D000704:Analysis of Variance; D000891:Anti-Infective Agents, Local; D002710:Chlorhexidine; D003188:Composite Resins; D001840:Dental Bonding; D019551:Dental Disinfectants; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D008963:Molar; D011109:Polymethacrylic Acids; D018709:Statistics, Nonparametric; D013718:Tensile Strength; D014906:Wetting Agents
D000891:Anti-Infective Agents, Local; C121036:Aqua-Prep; C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D003188:Composite Resins; C113175:Consepsis; D019551:Dental Disinfectants; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D011109:Polymethacrylic Acids; D014906:Wetting Agents; C444444:prime and bond 2.1; D000096:Acetone; D000537:Aluminum Oxide; D002710:Chlorhexidine