The effect of heating and ultrasound on the shear bond strength of glass ionomer cement.

摘要: The aim of this study was to compare the influence externally applied "command set" methods (heat, ultrasound) on shear bond strength enamel several glass ionomer cements (GIC). vestibular surfaces 180 extracted premolars were wet ground until a flat surface created, and divided into three groups. Three restorative GICs (Fuji IX GP Fast, Fuji Triage, Ionofil Molar AC) cured in ways: standard (SC), ultrasonic excitation (UC) by an external heat source (HC). In each group, teeth conditioned two 30 with 10% polyacrylic acid without conditioning. GIC used fill teflon molds (3 x 4 mm). samples loaded Universal testing machine (Lrx Material Testing Machine) at 1 mm/min crosshead speed. Results showed that conditioning had significantly greater (13.3 MPa) than all other tested groups (8.6-10.8 (p < 0.001). mean SC 3.6-5 MPa lower strength. Heating increase strength, improves properties restoration can be recommended for use as method.