VIABILITY OF USING NATURAL EXTRACTS IN DENTAL RESTORATIVE TREATMENT

Isabella Rodrigues Ziotti, Regina Guenka Palma-Dibb, Silmara Aparecida M. Corona, Aline Evangelista Souza-Gabriel*

ABSTRACT

Objectives: Natural extracts can modify the dental surface to improve bond strength. This study evaluates the bond strength of restorative material to dentin treated with natural solutions. Methods: Ninety fragments of bovine dentin were etched with 35% phosphoric acid and divided according to the natural solutions: GI - Untreated (control), GII - Camellia sinensis (green tea), GIII - Punica granatum (pomegranate), GIV - Vitis vinifera (grape seed), GV - Lycium barbarum (goji berry). Sixty Specimens were used on the microtensile bond strength test (μTBS) were restored and sectioned ± 1mm2 sticks (n=12). For adhesive interface analysis, fifteen fragments were treated with solutions, restored and prepared for SEM (n=3) and others fifteen fragments destined for surface analysis were treated with solutions and prepared for SEM (n=3). Results: Data were submitted to ANOVA and Tukey test (α=0.05). The highest values of μTBS (p<0.05) were obtained in the control groups (25.69 ± 6.32a), Camellia sinenis (28.14 ± 7. 66a) and Vitis vinifera (25.55 ± 4.00a), which are similar to each other (p>0.05). The fragments treated with Punica granatum (17.42 ± 4.82b) showed lowest values of μTBS (p <0.05). Fragments treated with Lycium barbarum showed intermediate values (23.44 ± 6.78ab) (p>0.05). SEM analysis of the dentin demonstrated a regular surface, without smear layer and the interface showed good hybridization of the entrance of dentin tubules and resin tags. Conclusion: The extracts solutions of Camellia sinensis, Vitis vinifera and Lycium barbarum did not interfere negatively on the bond strength of restorative material to dentin.

Keywords: Adhesion; Dentin; Plant extracts; Scanning electron microscopy.