Development of Novel Primer and New Surface Treatment forDental Adhesion of Zirconia

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  • ジルコニア歯科接着の新規プライマーおよび新表面処理法の開発
  • ジルコニア シカ セッチャク ノ シンキ プライマー オヨビ シン ヒョウメン ショリホウ ノ カイハツ

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Abstract

<p>Adhesion between zirconia as dental material and organic polymer as opaquer resin was confirmed to besufficiently strong using 3-methacryloyloxypropyltrimethoxysilane （MPTS） as a primer after sandblasting.Since pentaerythritol tetrakis ［3- (mercaptopropionate）］ acts as a primer for adhesion of precious metals,an ethanol solution of MPTS and the thiol was successfully utilized for the adhesion of opaquer irrespectiveof adherend. Application of the mixture as a multipurpose primer （ML） also enhanced the adhesive strengthafter thermalcycling whereas debonding occurred without priming. It should be emphasized that ML withoutany acidic compound, which might degrade MPTS, is featured by a long shelf-time. A stepped surfacestructure consisting of parallel grooves was carved on zirconia using a computer-aided design/computer-aidedmanufacturing system, and the surface structure was found to significantly strengthen adhesion to opaquer bysandblasting and priming with ML. A model of front tooth was prepared by building up of composite resin onzirconia or titanium frame, indicating that the fracture strength of the model was enhanced by priming withML to a level greater than that required by the actual occlusal force. Thus, the present study confirmed theutilities of ML as multipurpose primer and the stepped structure as effective surface treatment of zirconia.</p>

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