Comparison of various resin cements on shear bond strength to dentin (In Vitro)

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.

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

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).