ダイコア用光-化学重合型セメントの接着強度に関する研究 : 剪断および引張り強度試験法の確立とSEM観察による試料表面性状

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The purpose of this study is to establish tlte measuring methods for slaear and tensile bond strength of the "Dicor" castable ceramics cemented to bovine teeth substituted for human teeth utilized the " Dicor" Light Activated Ceumeuat, and to observe the surface ofthis ceramics treated for bonding by scanning electron microscope. Results and conclusions that can be obtained from this study are : 1. The methods introduced in this study are useful for measurement of shear and tensile bond strength for the Dicor castable ceramics and the other dental restorative materials as well. 2. The surface of this castable ceranaics after ceramming is covered by white layer with a thickness of approximately 50μm, and the microstructure of this layer is different from of the original tetrasilicic mica crystal ceramics. 3. The special surface with from 1 to 3μm square cylinderical crystalline being high acidresisting is revealed by etching of this white layer, and from 1 to 3μm mica crystal on the original layer. 4. This square cylinderical crystalline is developed from the surface to the inside through the white layer during ceramming, and the longest cylinderical crystalline is reached about 100μm length. 5. This square cylinderical crystalline might be one of the most important factors influencing the bond strength of the Dicor Light Activated cement.
1990-10-01