Targis 표면처리가 상아질과의 전단결합강도에 미치는 영향
EFFECTS OF SURFACE TREATMENT AND STORAGE CONDITIONS ON TARGIS/DENTIN BOND STRENGTH
오영택, 황수진, 이세준, 이광원,
소속 상세정보
오영택 ( ) - 전북대학교 치과대학 치과보존학교실
황수진 ( ) - 전북대학교 치과대학 치과보존학교실
이세준 ( ) - 전북대학교 치과대학 치과보존학교실
이광원 ( ) - 전북대학교 치과대학 치과보존학교실
KMID : 0362320000250020262
Abstract
The purpose of this study was to estimate shear bond strength according to difference in Targis surface treatment and storage condition. 140 non-carious extracted human molars and Targis D2100voclar, Liechtenstein) were used in the present study and were divided into 7 experimental groups respectively according to surface treatment of Targis. Group 1 : No treatment, Group 2 : 50㎛ aluminium oxide blasting, Group 3 : 4% HF etching for 3 minutes, Group 4 : 4% HF etching after blasting, Group 5 : silane treatment after blasting, Group 6 : silane treatment after 4% HF etching. Group 7 : silane treatment after blasting and 4% HF etching. In Each group, one half of 20 specimens was stored in distilled water at 37℃ for 24 hours and the other half was stored at atmosphere for 24 hours respectively. Dentin surface was etched with 10% H₃PO₄for 15 seconds and luting cement(Variolink Ⅱ, Vivadent, Liechtenstein) was applied by manufacturer´ s recommendation. Shear bond strength for´each group was then measured. To examine the failure patterns after shear bond test and to observe the change after surface treatment of Targis. Specimens were fabricated and observed under the SEM. Statistical analysis was performed by One Way ANOVA test and t-test.
The results were as follows :
1. The shear bond strength of the groups stored in water significantly lower than that of groups stored at atmosphere (P<0.05).
2. There was no significant difference in shear bond strength in groups stored in water (P>0.05).
3. The shear bond strength without surface treatment of Targis were lowest among all experimental groups in atmosphere condition (P>0.05).
4. There was no significant difference in bond strength between groups using the silane or not(P>0.05).
5. The groups treated by blasting, hydrofluoric acid and silane sequentially showed highest bond strength than that of other groups in atmosphere condition, but there was no significant difference (P>0.05).
6. The proportions of the specimens showing the mixed fracture failure were 20% in HF etching group and blasting + HF group, 40% in blasting + HF + silane group in atmosphere condition. All the specimens stored in water showed adhesive fracture failure.
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