The effect of surface treatment of fiber-reinforced posts on adhesion of a resin-based luting agent.
BACKGROUND
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.


OBJECTIVE
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.


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.
Choi
Yunjung
Y
Department of Dental Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Korea.
Pae
Ahran
A
Park
Eun-Jin
EJ
Wright
Robert F
RF
D000268:Adhesiveness; D020906:Air Abrasion, Dental; D000704:Analysis of Variance; D003188:Composite Resins; D001840:Dental Bonding; D003738:Dental Cements; D017268:Dental Prosthesis Retention; D003799:Dental Stress Analysis; D005898:Glass; D011176:Post and Core Technique; D019279:Resin Cements; D033081:Shear Strength; D012821:Silanes; D013499:Surface Properties; D019553:Tooth, Nonvital / Q000534:rehabilitation*
D003188:Composite Resins; D003738:Dental Cements; C076808:Monobond S; D019279:Resin Cements; D012821:Silanes; C009753:fiberglass; C103502:Variolink