Bond strength of high viscous glass ionomer cements primary dentin

Résumé

The aim of this study was to assess the tensile bond strength of three glass ionomer cements used for Atraumatic Restorative Treatment (ART) to primary teeth dentin. Forty eight dentinal surfaces of primary second molars were exposed and randomly assigned into 3 groups in according to the material used (n=16). Two Brazilian low cost glass ionomer cements (Group 1 - Maxxion R® - FGM and Group 2 - Vitro Molar® - DFL) and one worldwide high viscosity glass ionomer cement (Group 3 - KetacTM Molar Easymix - 3M ESPE). Specimens were buildup and submitted to tensile bond strength test (0.5 mm/min) after 24 hours distilled water storage at 37°C. Data obtained were submitted to one-way ANOVA and Tukey post hoc test (=5%). KetacTM Molar Easy Mix showed higher tensile strength values (3.98 ± 0.70 MPa) (p<0.05) compared with Maxxion R® (2.88 ± 0.68 MPa) and Vitro Molar® (2.61 ± 0.91 MPa), that presented similar statistical bond strength values. KetacTM Molar Easymix has better performance in bonding to primary teeth dentin compared with Vitro Molar® and the Maxxion R®.