The durability of three self-etch adhesives bonded to dentin
10.3760/cma.j.issn.1002-0098.2013.04.013
- VernacularTitle:三种自酸蚀粘接剂牙本质粘接耐久性的比较
- Author:
Fu-Cong TIAN
1
;
Xiao-Yan WANG
;
Xue-Jun GAO
Author Information
1. 100081,北京大学口腔医学院·口腔医院牙体牙髓科
- Keywords:
Dentin-bonding agents;
Dental cements;
Durability
- From:
Chinese Journal of Stomatology
2013;48(4):244-247
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the durability of self-etch adhesives bonded to dentin in vitro.Methods Forty-two extracted human molars were selected and occlusal dentin surfaces were exposed.The teeth were randomly distributed into three groups based on adhesives applied.The one-step self-etch adhesive B(Adper Prompt) and C(G-Bond) and two-step self-etch adhesive A (Clearfil SE bond)were used.After application of the adhesives to the dentin surfaces,composite crowns were built up,after 24 h water storage,the teeth were sectioned longitudinally into sticks(1.0 mm × 1.0 mm bonding area) for microtensile testing or slabs (1 mm thick) for scanning electron microscopec (SEM) observation.Bonding strength(mTBS) and nano-leakage were evaluated immediately after cutting or after 6 months in water.The mTBS was analyzed using one-way ANOVA (SPSS 13.0).The nanoleakage was observed by SEM with a backscattered electron detector.Results Both adhesives and water storage time affected the mTBS.All adhesives showed decreased bond strength after six-month water aging [A dropped from (40.60 ±5.76) MPa to (36.04±3.15) MPa; B dropped from (19.06 ± 1.50) MPa to (11.19 ± 1.97) MPa; C dropped from (17.75 ± 1.10) MPa to (9.14 ± 1.15) MPa] (P ＜ 0.05).B and C showed lower mTBS than A after aging (P ＜ 0.05).Compared to A,nanoleakage was more obvious after aging for B and C.Conclusions All self-etch adhesives tested were probably influenced by water aging,however,the two-step adhesive showed better durability than the one-step adhesives.
