title: Effect of storage time on microtensile bond strength between quartz fiber post and composite core after different post surface treatments.
abstract: OBJECTIVE
  The aim was to evaluate the influence of water storage on fiber post-resin composite adhesion after different postsurface treatments.
  
  
  METHODS
  Forty-two fiber posts were used. Half of them were treated by hydrogen-peroxide and the other half were sandblasted. The adhesive (Single Bond, 3M, USA) was applied on the post. Core was built-up using flowable composite (Ælite Flow, Bisco, USA). The specimens were divided into eight groups. Group 1 was treated with H(2)O(2). Groups 2-4 were treated with H2O2 but stored for 3, 6, and 9 months, respectively. Groups 5-8 were sandblasted and stored for 0, 3, 6, and 9 months. μTBS was measured and data analyzed using one-way ANOVA and Tukey HSD. The fractured surfaces were evaluated by a stereomicroscope. The morphology of interfaces was assessed under SEM. H(2)O(2)-treated groups showed higher bond-strength.
  
  
  RESULTS
  The effect of "surface-treatment method" and "storage-time" was significant (P<0.0001), but there was no significant difference for their interaction effect (P=0.05). Water aging significantly decreased μTBS.
  
  
  CONCLUSIONS
  Water aging significantly decreased microtensile bond strength regardless of the type of post surface treatment.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Khamverdi
authors.forename: Samane
authors.initials: S
authors.lastname: Abbasi
authors.forename: Elahe
authors.initials: E
authors.lastname: Habibi
authors.forename: Shahin
authors.initials: S
authors.lastname: Kasraei
authors.forename: Mohadese
authors.initials: M
authors.lastname: Azarsina
authors.forename: Shabnam
authors.initials: S
authors.lastname: Ebadi