ハイブリッドセラミックスと各種コア材との接着強さおよび接着耐久性
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概要
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The hybrid ceramics is a visible light-activated material with improved mechanical properties by higher filler loading. To apply this material for jacket crown restorations, the bond strength between the hybrid ceramics and core materials should be evaluated. The purpose of this study was to investigate the bond strength and bonding durability between the hybrid ceramics and various core materials with adhesive resin cements. Four kinds of core materials (two cast core alloys, composite core build-up, and cast glass ceramics) and two adhesive resin cements (P21 and SB) were used. To evaluate the bonding durability, the bond strengths after 3 month-immersion in water and accelerated aging test (thermal cycling up to 10^5 cycles) were measured. The results were as follows. 1. Application of metal primer and silane coupling agent to the surface of the hybrid ceramics and core materials improved the bond strength. 2. The bond strenghts after immersion in water for 3 months ranged from 17.8MPa for composite core to 34.4MPa for cast core material when P21 was used. 3. The decrease in bond strength by water immersion for P21 was much lower than that for SB. 4. Thermal cycling considerably reduced the bond strength when SB was used 5. Marginal leakage was observed at the interface between SB and cast glass ceramics after thermal cycling (2×1O^4 cycles). 6. The resin cement P21 showed a superior bond strength to SB after water immersion and accelerated aging test. These results suggest that the combination of resin cement and core material was a significant important factor for the bonding durability of the hybrid ceramics in oral conditions.
- 福岡歯科大学学会の論文
- 1997-06-30
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- ハイブリッドセラミックスと各種コア材との接着強さおよび接着耐久性
- ハイブリッドセラミックスと各種コア材との接着強さおよび接着耐久性