title: Microtensile bond strength between a UDMA fiber post and different resin cements: Effect of pre-surface treatment.
abstract: During a fiber post cementation, bonding failure often occurs at the junction between the fiber-post and resin-cement. Because this failure requires better characterization, we evaluated if different post surface treatment can affect the bond strength of urethane dimethacrylate (UDMA) fiber-posts with resin-cements. Three groups were created: G1: no treatment/silane; G2: ethyl alcohol (96° GL)/silane; G3: 24% H2O2/silane and further divided into four subgroups: I-Unicem/3MESPE; II-BisCem/Bisco; III-Panavia SA/Kuraray and IV-DuoLink/Bisco. Blocks of cured resin cements and posts placed in the center were serially cut into bar-shaped specimens and loaded into a micro tensile testing machine. ANOVA indicated no significant differences among post surface treatments (p>0.05), however, significant within the resin cements (p<0.05) and the interaction of both (p<0.05). The G3/IV showed the highest bond strength values. SEM showed that surface treatments on UDMA fiber posts presented no benefits in terms of surface roughness, thus, should not be performed.
authors: Department of Comprehensive Care, School of Dental Medicine, Case Western Reserve University.
authors: Renato Cassio
authors: RC
authors: Roperto
authors: Thiago Soares
authors: TS
authors: Porto
authors: Lisa
authors: L
authors: Lang
authors: Sorin
authors: S
authors: Teich
authors: Sean
authors: S
authors: Weber
authors: Omar
authors: O
authors: El-Mowafy
authors: Sizenando Toledo
authors: ST
authors: Porto-Neto
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D006861:Hydrogen Peroxide; D008422:Materials Testing; D011176:Post and Core Technique; D019279:Resin Cements; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D019279:Resin Cements; D006861:Hydrogen Peroxide