Adhesion of a quartz fibre post to a composite resin core: influence of bonding agents and their curing mode.
Fibre-reinforced composite posts are currently used to restore endodontically-treated teeth. Push-out tests were carried out to evaluate the performance of several bonding agents on the retention of an endodontic quartz fibre post to a composite resin core. Five bonding agents were investigated in both self-cure and light-cure modes. Ten experimental groups of 10 posts each were constituted as a function of curing mode and bonding agent. Specimens were mounted in a dedicated Teflon mould. This experimental set-up allowed the determination of true shear strength. One-way ANOVA and Student-Newman-Keuls tests were used for statistical analysis. The bonding strengths ranged from 23.4 MPa to 35.3 MPa. The best results were obtained with a light-cure self-etch bonding agent; in all cases photo-polymerisation led to statistically higher bonding strengths compared to chemical auto-polymerisation. Shear bond strength at the post-adhesive interface was also found to be significantly dependent on the nature of the bonding agent. AdheSe self-etch bonding agent was more effective than etch-and-rinse single-component bonding agents.
Faculté d'Odontologie, Université Paul Sabatier, Toulouse III, France.
Nicolas
N
Cheleux
Patrick
P
Sharrock
Michel
M
Degrange
D000268:Adhesiveness; D000269:Adhesives; D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D011138:Polytetrafluoroethylene; D011791:Quartz / Q000737:chemistry*; D013314:Stress, Mechanical
D000269:Adhesives; D003188:Composite Resins; D011791:Quartz; D011138:Polytetrafluoroethylene