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4종의 도재 수리 시스템용 콤포짓 레진의 전단결합 강도 비교
강백면,계기성,고영무 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.4
Fractures in metal-ceramic restorations can be occurred and need to be repaired. The purpose of this study was to investigate the shear bond strength of four kinds of ceramic repair systems (Superbond C&B, Choice, Clearfil and Ivoclar) applied to the porcelain surface and the metal combined porcelain surface with visible light cured composite resin. Twenty samples were prepared for each bonding system(ten for porcelain surface and ten for metal combined porcelain surface). All samples were etched with 8.9% hydrofluoric acid for 60 seconds. The specimens were made according to the manufacturer's instruction. After the thermocycling for 2,000 cycles between 5℃ and 55℃ with 30 seconds dwell time, the specimens were tested for calculating shear bond strength using universal testing machine with a 3㎜/min crosshead speed. In porcelain surface groups, the shear bond strength of Ivoclar ceramic repair system was significantly lower than those of other systems(p<0.05). In metal combined porcelain surface groups, the shear bond strength of Ivoclar ceramic repair system was significantly lower than those of other systems(p<0.05), and the shear bond strength of Choice system was significantly lower than those of Clearfil repair system and Superbond C&B system(p<0.05).