The Eevaluation One Bottle Type Silane Coupling Agents Masahiro Aida, Hideo Kanaya, Taira Kobayashi, Keiji Utsugizaki, Yoshizumi Murata, Tohru Hayakawa* and Kozo Horie* Abstract: Here is investigated the adhesiveness of one liquid type silane coupling agent. For the experiment, following materials are used : Cosmotech porcelain primer, Laminabond porcelain primer, Optec silane coupling agent, and Clearfil porcelain bond. The opal porcelain or the masking porcelain surface was polished with # 1000 paper and randomly classified as one of the following three conditions: 1) non etching, 2) phosphoric acid etching, 3) hydrofluoric acid etching. Then the porcelain surface was treated with each porcelain primer. The Laminabond composite paste was applied on the treated surface and cured by photo irradiation. The shear bond strengths between the composite and the porcelain were measured after one day immersion in 37 water, or 10,000 thermocycles between 4 and 60. There was no difference between the adhesion of composite to the opal porcelain and to the masking porcelain. The Laminabond porcelain primer and Optec silane coupling agent gave high bond strengths of 150^-200 kgf/cm2 on the non etching surface. Mechanical effects by the hydrofluoric acid etching did not contribute to the adhesion. The bond strengths after 10,000 thermocycles remarkably decreased in all kinds of porcelain primer tested here. Key words: porcelain, adhesion, porcelain primer, silane coupling agent, hydrofluoric acid etching Department of Dental Materials, Nihon University School of Dentistry at Matsudo (Director: Prof. Kozo Department of Crown and Bridge Prosthodontics, Nihon Horie) University School of Dentistry at Matsudo (Director: Prof. Yoshizumi Murata)
Material Name Manufacture Porcelain Uni bond vintage opal porcelain (A,B) Shofu Inc., Kyoto, Japan Lamina porcelain masking dentin porcelain (LMA3) Shofu Inc., Kyoto, Japan Porcelain primer Cosmotech porcelain primer GC Co., Tokyo, Japan Laminabond porcelain primer Shofu Inc., Kyoto, Japan Optec silane coupling agent Jeneric-Pentron Inc., Jeneric, USA Clearfil porcelain bond Kuraray Co., Osaka, Japan Composite Laminabond composite paste universal Shofu Inc., Kyoto, Japan
Fig. 3 Shear bond strengths between composite resin Fig. 2 Shear bond strengths between composite resin and porcelain treated with Laminabond porcelain primer and nnrcelain treated with Cosmotech nrimer
Fig. 4 Shear bond strengths between composite resin and porcelain after 10,000 thermocycles
Fig. 5 Shear bond strengths between composite resin and porcelain treated with Optec silane coupling agent Fig. 6 Shear bond strengths between composite resin and porcelain treated with Clearfil porcelain bond
5: 135 `144, 1987. 4) Clyde, J.S. and Gilmour, A.: Porcelain veneers: a preliminary review, Br Dent J, 164:9 `14, 1988. 6) Lacy, A.M., Laluz, J., Watanabe, L.G. et al: Effect of porcelain surface treatment on the bond to composite, J Prosthet Dent, 60:288 `291, 1988. 1) Horn, H.R.: A new lamination: Porcelain bonded to enamel, NYS Dent J, 49: 401 `403, 1983. 2) Calamia, J.R.: Etched porcelain facial veneers, A new treatment modality based on scientific and clinical evidence, NYJ Dent, 53: 255 `259, 1983.