Smear layer 처리에 따른 미세누출에 대한 연구
The effect of smear layer treatment on the microleakage
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Smear layer 처리에 따른 미세누출에 대한 연구이정민박상혁최기운*경희대학교 치과대학 치과보존학교실THE EFFECT OF SMEAR LAYER TREATMENT ON THE MICROLEAKAGEJung-Min Lee, Sang-Hyuk Park, Gi-Woon Choi*Dept. of Conservative Dentistry, Division of Dentistry, Graduate school of KyungHee Universityroot canal obturation with or without thetreatment of smear layer. Eighty extracted human teeth with one canal were selected. Instrumentation wasperformed with crown-down technique. After instrumentation, roo t canals of the NaOCl group and NaOCl-up were irrigated with 17% EDTA.Then all teeth were obturated using continuous wave obturation technique.NaOCl group and EDTA group were immersed in methylene blue solu tion for 84hours. NaOCl-6 groupand EDTA-6 group were immersed in methylene blue solution for 6 ㎜ (Level 1), 3.0 ㎜ (Level 2) and 4.5 ㎜ (Level 3) from the root ape x. The length of dye-penetrated inter-face and the circumferential length of canal at each level were measured using Sigma-Scan Pro 5.0.1. The mean leakage ratio was decreased cervically.2. NaOCl group showed higher mean leakage ratio than EDTA group at each level. But there was signifi-cant difference at level 1 only (p < 0.05).3. NaOCl-6 group showed higher mean leakage ratio than EDTA-6 g roup at each level. But there wassignificant difference at level 1 only (p < 0.05).4. NaOCl-6 group showed higher mean leakage ratio than NaOCl gr nificant difference at level 1 only (p < 0.05). 5. EDTA-6 group showed higher mean leakage ratio than EDTA grou p at each level. But there was nosignificant difference.6. In NaOCl group and NaOCl-6 group, scanning electron microgra phs of tooth sections generally covereds showing the penetration of sealersto opened dentinal tubules. The results suggest that removal of smear layer was effective t o reduce the apical microleakage of the rootcanal. [J Kor Acad Cons Dent 31(5):378-389, 2006]
Abstract
Smear layer 처리에 따른 미세누출에 대한 연구이정민박상혁최기운*경희대학교 치과대학 치과보존학교실THE EFFECT OF SMEAR LAYER TREATMENT ON THE MICROLEAKAGEJung-Min Lee, Sang-Hyuk Park, Gi-Woon Choi*Dept. of Conservative Dentistry, Division of Dentistry, Graduate school of KyungHee Universityroot canal obturation with or without thetreatment of smear layer. Eighty extracted human teeth with one canal were selected. Instrumentation wasperformed with crown-down technique. After instrumentation, roo t canals of the NaOCl group and NaOCl-up were irrigated with 17% EDTA.Then all teeth were obturated using continuous wave obturation technique.NaOCl group and EDTA group were immersed in methylene blue solu tion for 84hours. NaOCl-6 groupand EDTA-6 group were immersed in methylene blue solution for 6 ㎜ (Level 1), 3.0 ㎜ (Level 2) and 4.5 ㎜ (Level 3) from the root ape x. The length of dye-penetrated inter-face and the circumferential length of canal at each level were measured using Sigma-Scan Pro 5.0.1. The mean leakage ratio was decreased cervically.2. NaOCl group showed higher mean leakage ratio than EDTA group at each level. But there was signifi-cant difference at level 1 only (p < 0.05).3. NaOCl-6 group showed higher mean leakage ratio than EDTA-6 g roup at each level. But there wassignificant difference at level 1 only (p < 0.05).4. NaOCl-6 group showed higher mean leakage ratio than NaOCl gr nificant difference at level 1 only (p < 0.05). 5. EDTA-6 group showed higher mean leakage ratio than EDTA grou p at each level. But there was nosignificant difference.6. In NaOCl group and NaOCl-6 group, scanning electron microgra phs of tooth sections generally covereds showing the penetration of sealersto opened dentinal tubules. The results suggest that removal of smear layer was effective t o reduce the apical microleakage of the rootcanal. [J Kor Acad Cons Dent 31(5):378-389, 2006]
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