title: Shear bond strength of two adhesives to bovine dentin contaminated with various astringents.
abstract: OBJECTIVE
  To investigate the in vitro shear bond strength of two adhesives to bovine dentin contaminated with various astringents.
  
  
  METHODS
  120 adult bovine incisors were collected and cut to obtain 240 specimens. The specimens were randomly divided into a self-etch adhesive group (N = 120) and a total-etch adhesive group (N = 120). Both of the groups were divided into the following six subgroups: the non-contamination group and the contamination groups 25% Al2(SO4)3 (Orbat sensitive), 25% AlCl3 (Racestyptine), 10% AlCl3 (Roeko Gingiva Liquid), 15.5% Fe2(SO4)3 (Astringedent) and AlCl3 Paste (Astringent Retraction Paste, N = 20 in each subgroup). Each astringent was applied for 1 minute to the dentin surface before rinsing with water spray for 20 seconds. The respective adhesive was then applied according to the manufacturer's instructions. Two composite cylinders were shaped with a mold, cured on the dentin surface of each specimen and sheared off after 1 day and 1 week storage. The shear bond strengths (MPa) were recorded and analyzed with ANOVA. Results: In the self-etching adhesive group, all astringents showed negative effects on dentin bonding (P < 0.05). Astringent contamination did not have a negative effect on dentin bonding in the total-etch adhesive group (P > 0.05).
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Xu
authors.forename: Quan
authors.initials: Q
authors.lastname: Chen
authors.forename: Alexander
authors.initials: A
authors.lastname: Lederer
authors.forename: Christoph
authors.initials: C
authors.lastname: Bernau
authors.forename: Guangyun
authors.initials: G
authors.lastname: Lai
authors.forename: Dalia
authors.initials: D
authors.lastname: Kaisarly
authors.forename: Dr Med
authors.initials: DM
authors.lastname: Dent
authors.forename: Karl-Heinz
authors.initials: KH
authors.lastname: Kunzelmann
mesh_terms: D000818:Animals; D001252:Astringents / Q000737:chemistry*; D002417:Cattle; D003804:Dentin / Q000737:chemistry*; D033081:Shear Strength
chemical_list: D001252:Astringents