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Shear bond strength of a titanium reinforced core material after using multistep and single-step bonding agents
B I Cohen1, M K Pagnillo, B L Musikant
1Essential Dental Laboratories, S. Hackensack, NJ, USA.
Statement Of Problem:
Recently introduced single-step bonding agents reduce the number of steps involved in the bonding process. Nevertheless, there are few studies on the bond strengths obtained with these new systems.
Purpose:
This in vitro study evaluated the shear bond strength of a titanium-reinforced cores bonded with 5 multistep bonding systems (ScotchBond Multi-Purpose, OptiBond, All Bond-2, Tenure, and ProBond) and 5 single-step bonding systems (Single-Bond, OptiBond Solo, One-Step, Tenure Quik, and Prime & Bond 2.1).
Material And Methods:
The experiment was divided into 10 groups with 10 specimens per group. The shear bond strengths were evaluated after 24 hours on an MTS universal testing machine with a crosshead speed of 6.35 mm/minute.
Results:
A 2-way ANOVA showed that All Bond-2 and One-Step recorded the highest means and differed significantly from the Den-Mat systems (Tenure A&B and Tenure Quik), the Kerr systems (OptiBond and Opti-Solo), and the Caulk systems (ProBond and Prime & Bond 2.1). ProBond and Prime & Bond 2.1 bonding systems had the lowest mean and differed from the 3 other brands. Tenure A&B and Tenure Quik bonding systems and OptiBond and Opti-Solo bonding systems did not differ from one another.
Conclusion:
The single-step bonding agents did not produce an improvement in shear bond strengths. The wide range of shear bond strength reported for the single-step systems appeared to indicate that these bonding systems are technique sensitive.