Adhesive Strength of Composite Resin Materials for Veneering to CP Titanium Treated with Wire Electric Discharge Machining and Anodic Oxidation

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  • FUJISHIMA Akihiro
    Department of Oral Biomaterials and Technology, Showa University School of Dentistry
  • MIYAZAKI Takashi
    Department of Oral Biomaterials and Technology, Showa University School of Dentistry
  • KUNESHITA Hitoshi
    Department of Oral Biomaterials and Technology, Showa University School of Dentistry

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  • ワイヤ放電加工および陽極酸化処理を施したチタンと硬質レジンの接着強さ

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Abstract

CP titanium(Ti)specimens were prepared with sandblasting, wire electric discharge machining(Wire EDM), and anodic oxidation.Two commercial composite resin materials for veneering, Dentacolor and New Metacolor, were adhered on the titanium specimens with each particular bonding system, Silicoater MD and 4-META bonding respectively.Shear bond tests were performed on samples stored in air at 23℃ for 24 hours, in water at 37℃ for a month, and in water for 104 thermal cycling with a cycle of 37, 4, 37 and 60℃.Shear bond strengths of all Ti specimens with Dentacolor and New Metacolor stored in air for 24 hours were similar to those of Ni-Cr alloy as a control.Shear bond strengths of Ti and Ni-Cr specimens with Dentacolor did not decrease after storing in water for a month or even after thermal cycling.However, shear bond strengths with New Metacolor decreased significantly after thermal cycling.Ti specimens treated with Wire EDM showed sufficient shear bond strength with both Dentacolor and New Metacolor.However, Ti specimens treated with anodic oxidation in this study did not show sufficient strength especially with New Metacolor.Therefore, surface treatment of titanium was important to achieve excellent adhesion with composite resin.

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