Influence of sandblasting distance on enamel and ceramic structure bond strength

Lorena Rincon Garcia, Ana Cecilia Roso Reyes, Maria Isabel Canal, Mauricio Peña Castilho, Osnara Maria Mongruel Gomes, John Alexis Dominguez


Objetive: The purpose of this study is was to evaluate the influence of sandblasting ceramic and enamel structure on bond strength, changing  distance.

Material and methods: 60 third molars , were selected, enamel surfaces were ground flat with wet 600 - 2000 grit aluminum oxide abrasive papers  and polished with three, one, and one-fourth micrometer-grit diamond pastes. Obtained 120 lithium disilicate-based core ceramic discs ( 2 mm diameter;1 mm thickness), divided into 7 groups  [Group C, don’t sandblasting, Group SB-E(5-10) enamel sandblasting 5 and 10 mm, Group SB-C(5-10)  ceramic sandblasting 5 mm and 10 mm, Group SB-EC(5-10)  enamel and ceramic sandblasting 5 mm and 10 mm]   after was performed microshear and Atomic Force Microscopy (AFM), Statistic Teste of normality , after one-way ANOVA and Tukey test (α: 0.05).

Results: The group C present bond strength (59.2±12.5), the group SB-E 5 mm (21.7±08.8) (p<0.005), the group SB-E10 (53.6±14.3).

Conclusion: The use of sandblasting treatment of the enamel surface a 5 mm by 20 seconds decreases the bonding strength to microshear.

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