| Abstract:
Background and Aim: Increasing demand for esthetic restorations, esp for the anterior teeth has led to a greater use of all ceramic materials. In order to decrease technique sensivity of cementing, self-etch resin cements were offered that need no pretreatment of the tooth. In this paper we compared the shear bond strength of self-etch and total-etch cements of the same brands.
Materials and Methods: 60 third human molar divided to 6 experience groups: 1-Rely XUnicem (3M ESPE), 2-RelyXARC (3M ESPE) +Acid etch 37%+SingleBond (3M ESPE), 3- Nexus2 (KerrHawe) Acid etch 37%+Optibond Solo (KerrHawe), 4-Maxcem (KerrHawe), 5-RelyXUnicem (3M ESPE) +Acid etch 37%+SingleBond (3M ESPE), 6- Maxcem (KerrHawe)+Acid etch 37%+Optibond Solo (KerrHawe).The shear bond strength of the specimens were then measured. The surfaces of the dentines were examined using an stereomicroscope.
Results and Conclusion: Shear bond strength of the specimens were as followed: (1) 5.27 ±2.91 MPa (2) 9.33±4.83 MPa (3) 3.28±1.12 MPa (4) 10.45±4.82 MPa (5) 5.72±2.29 MPa (6) 11.75±4.01 MPa The shear bond strength of the total-etch resin cements was significantly higher than of the self-etch resin cements (p<0.001).Using pretreatments for self-etch cements was significantly effective for Maxcem (p<0.05).
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