[Evaluation of shear bond strengths of self-etching and total-etching dental adhesives to enamel and dentin].
OBJECTIVE
To evaluate the shear bond strengths of four dental adhesives in vitro.


METHODS
The facial surfaces of 20 human maxillary incisors were prepared to expose fresh enamel and randomly divided into four groups, in each group 5 teeth were bonded with one adhesives: group A (Clearfil Protect Bond, self-etching two steps), group B (Adper( Prompt, self-etching one step), group C (SwissTEC SL Bond, total-etching two steps), group D (Single Bond, total-etching two steps). Shear bond strengths were determined using an universal testing machine after being stored in distilled water for 24 h at 37 degrees C.


RESULTS
The bond strengths to enamel and dentin were (25.33 +/- 2.84) and (26.07 +/- 5.56) MPa in group A, (17.08 +/- 5.13) and (17.93 +/- 4.70) MPa in group B, (33.14 +/- 6.05) and (41.92 +/- 6.25) MPa in group C, (22.51 +/- 6.25) and (21.45 +/- 7.34) MPa in group D. Group C showed the highest and group B the lowest shear bond strength to enamel and dentin among the four groups.


CONCLUSIONS
The two-step self-etching adhesive showed comparable shear bond strength to some of the total-etching adhesives and higher shear bond strength than one-step self-etching adhesive.
Yu
Ling
L
Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Liu
Jing-Ming
JM
Wang
Xiao-Yan
XY
Gao
Xue-Jun
XJ
D000134:Acid Etching, Dental; D001840:Dental Bonding; D003738:Dental Cements; D003799:Dental Stress Analysis; D003804:Dentin; D006801:Humans; D033081:Shear Strength
D003738:Dental Cements