STATEMENT OF PROBLEM: Surface treatment of fiber-reinforced posts may not always increase adhesion, especially on the post/resin-based luting agent interface, which is a weaker interface than the dentin/adhesive interface. PURPOSE: The purpose of this in vitro study was to evaluate the influence of different post surface treatments on the bond strength of a luting agent to a fiber post. MATERIAL AND METHODS: Sixty-eight fiber-reinforced posts (D. T. Light-Post) were divided into 4 groups and treated with 1 of the following surface treatment procedures: no treatment (NS) (control), silanization (SA) (Monobond-S), airborne-particle abrasion (AB) (Airsonic Alu-Oxyd), or silanization subsequent to airborne-particle abrasion (AB plus SA). Specimens were bonded with dual-polymerizing resin-based luting material (Variolink II) and stored in water at 37 degrees C for 24 hours. Shear bond strength (MPa) was measured using a universal testing machine. Data were analyzed with 1-way ANOVA and the multiple comparisons Scheffé test with Bonferroni correction (alpha=.05). RESULTS: Shear bond strength of the luting agent to the post was significantly affected by surface treatment (P<.05). Treating the surface of the post with airborne-particle abrasion resulted in a significantly higher bond strength compared with other treatments. There was no significant difference in bond strength between the silanization group and the no treatment group or the silanization plus airborne-particle abrasion group. CONCLUSIONS: Airborne-particle abrasion provided a significant increase in bond strength between the post and the luting agent evaluated, without additional treatments. Copyright 2010 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Mosby, Inc. All rights reserved.
STATEMENT OF PROBLEM: Surface treatment of fiber-reinforced posts may not always increase adhesion, especially on the post/resin-based luting agent interface, which is a weaker interface than the dentin/adhesive interface. PURPOSE: The purpose of this in vitro study was to evaluate the influence of different post surface treatments on the bond strength of a luting agent to a fiber post. MATERIAL AND METHODS: Sixty-eight fiber-reinforced posts (D. T. Light-Post) were divided into 4 groups and treated with 1 of the following surface treatment procedures: no treatment (NS) (control), silanization (SA) (Monobond-S), airborne-particle abrasion (AB) (Airsonic Alu-Oxyd), or silanization subsequent to airborne-particle abrasion (AB plus SA). Specimens were bonded with dual-polymerizing resin-based luting material (Variolink II) and stored in water at 37 degrees C for 24 hours. Shear bond strength (MPa) was measured using a universal testing machine. Data were analyzed with 1-way ANOVA and the multiple comparisons Scheffé test with Bonferroni correction (alpha=.05). RESULTS: Shear bond strength of the luting agent to the post was significantly affected by surface treatment (P<.05). Treating the surface of the post with airborne-particle abrasion resulted in a significantly higher bond strength compared with other treatments. There was no significant difference in bond strength between the silanization group and the no treatment group or the silanization plus airborne-particle abrasion group. CONCLUSIONS: Airborne-particle abrasion provided a significant increase in bond strength between the post and the luting agent evaluated, without additional treatments. Copyright 2010 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Mosby, Inc. All rights reserved.