Bond strength of self-etching primer and total-etch adhesive systems to primary dentin.
OBJECTIVE
The objective of this study was to assess in vitro the tensile bond strength of a self-etching and 2 total-etch, single-bottle adhesive systems to primary dentin.


METHODS
Thirty-six sound primary canine buccal surfaces were randomly assigned to 3 groups (N = 12), corresponding to the tested adhesive systems: (1) group I = Excite (EX); (2) group II = Single Bond (SB); and (3) group III = Prompt L-Pop (PLP). After 24-hour storage in distilled water, tensile bond strength was tested for failure at a crosshead speed of 0.5 mm/min.


RESULTS
Means (MPa) and standard deviation (+/-) were: (1) EX = 12.72 (+/- .89); (2) SB = 10.86 (+/- 2.09); (3) PLP = 8.66 (+/- 2.23). Single Bond and Excite showed statistically similar results (P >.05) and provided the highest means. Prompt L-Pop was statistically different from the other groups (P < .05) and reached the lower bond strength to primary dentin.


CONCLUSIONS
Total-etch agents provided the best overall bonding performance, whereas the all-in-one, self-etching, self-priming adhesive system yielded remarkably lower bond strength to primary teeth dentin.
Torres
Carolina Paes
CP
Department of Pediatric Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto-São Paulo, Brazil, carolptorres@hotmail.com
Corona
Silmara Aparecida Milori
SA
Ramos
Renata Pereira
RP
Palma-Dibb
Regina Guenka
RG
Borsatto
Maria Cristina
MC
D000134:Acid Etching, Dental / Q000379:methods*; D017438:Bisphenol A-Glycidyl Methacrylate; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D019279:Resin Cements; D013718:Tensile Strength; D014094:Tooth, Deciduous
D017220:Dentin-Bonding Agents; C420130:Excite cement; D008689:Methacrylates; C408584:Prompt L-Pop; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate