Status of ten self-etch adhesives for bonding to dentin of primary teeth.

Objective Aim of this in vitro study was to compare self-etch adhesives regarding microtensile bond strength (μ- TBS) to dentin of primary teeth. Methods Fifty freshly extracted primary molars were ground to expose caries-free dentin. Specimens were bonded with ten self-etch adhesives (i Bond self-etch/ Heraeus, Xeno V+/ Dentsply, G- Bond, Gaenial Bond/ GC, BeautiBond/ Shofu, Adhe SE One F/ Ivoclar Vivadent, Adper Easy Bond/3 M ESPE, Clearfil SE Bond/ Kuraray, Opti Bond XTR/ Kerr Hawe, Prime& Bond NT/ Dentsply). After 24-h storage (distilled water, 37°C), resin-dentin beams were cut and 848 resin-dentin sticks were subjected to μ- TBS tests. Fracture analysis was carried out at 40× magnification under a fluorescence microscope and under a SEM. Results Three adhesives (i Bond SE, Clearfil SE Bond, Prime& Bond NT) did not suffer pre-test failures ( PTF). Adhe SE One F revealed the largest portion of PTF (28%; P < 0.05). Clearfil SE Bond and Opti Bond XTR exhibited more cohesive fractures than the other adhesives (77.3% vs 64.8%; P < 0.05). i Bond SE, Gaenial Bond, Clearfil SE, and Opti Bond XTR achieved μ- TBS of >60 MPa, whereas Xeno V+ and Adhe SE One F ranged only at ~20 MPa ( P < 0.05). Conclusion Within the limits of this study, the self-etch adhesives under investigation proved different extents of initial μ- TBS to primary dentin with i Bond SE, Gaenial Bond, Clearfil SE, and Opti Bond XTR having been most successful. [ABSTRACT FROM AUTHOR]