코어 표면처리가 지르코니아 보철물의 파절저항성에 미치는 영향
Effect of core surface treatment on the fracture resistance of zirconia restoration
정수하, 김정미, 박다령, 박지영, 배지명, 오승한,
소속 상세정보
정수하 ( Jeoung Su-Ha ) - 충북보건과학대학교 치기공과
김정미 ( Kim Jeong-Mi ) - 원광대학교 치과대학병원 중앙기공실
박다령 ( Park Da-Ryeong ) - 원광대학교 치과대학 치과생체재료학교실
박지영 ( Park Ji-Young ) - 원광대학교 치과대학 치과생체재료학교실
배지명 ( Bae Ji-Myung ) - 원광대학교 치과대학 치과생체재료학교실
오승한 ( Oh Seung-Han ) - 원광대학교 치과대학 치과생체재료학교실
KMID : 1035320140410030161
Abstract
The purpose of this study was to examine the effect of acid-base surface treatment on the fracture resistance, which is one of main mechanical property, of zirconia restoration in order to improve the bonding characterization between zirconia core and ceramic veneer in bi-layered all ceramic restoration system. 10% hydrofluoric acid (HF) and 1 M sodium hydroxide (NaOH) were used as acid and base chemical solutions for surface treatment, respectively. Fracture-resistance tests were performed to investigate the effects of acid and liner treatment on the improvement of the bonding strength between veneer ceramics and zirconia. Specimens were divided into five groups (n = 4) according to the type of surface treatment: (1) Group A, no treatment (control); (2) Group B, liner treatment; (3) Group C, 10% HF etching for 60 s; (4) Group D, 10% HF etching for 60 s and liner treatment. All results of fracture resistance test showed that there were no significant differences between surface treatment types. Failure mode observation indicated that most specimens of Cerasys, Zmatch, and ICE groups showed cohesive failure mode regardless of the method of surface treatment. From the results of study, the short (1 min) treatment of zirconia in HF solution is supposed to be suitable for improving bond strength of zirconia restoration, but long (more than 30 min) treatment of zirconia in HF solution is expected to deteriorate the zirconia structure. Also, several factors such as liner and acid treatment, which improve the fracture resistance of zirconia restoration, seemed to depend on the type of zirconia materials.
키워드
bond characterization; fracture resistance; hydrofluoric acid; sodium hydroxide; surface treatment; zirconia estoration
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