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Retrograde filling시 수종 충전재료에 따른 폐쇄효과에 대한 연구
도정욱,권혁춘,Do, Jeong-Wook,Kwon, Hyuk-Choon 대한치과보존학회 1989 Restorative Dentistry & Endodontics Vol.14 No.1
This study was conducted to evaluate and compare the apical leakage among the retrograde filling materials; retrograde filling with non-zinc amalgam, cavity varnish and non-zinc amalgam, z.o.e cement, Glass Ionomer cement, scotch bond and silux. Sixty single rooted teeth were divided into six groups and each tooth was individually prepared for its particular group. The specimens were incubated at $37^{\circ}C$ for 24 hrs and then were infiltrated by 2% methylene blue for 7 days. Apical leakage was evaluated by measuring the degree of dye penetration between the filling material and the canal wall. The results were as follows: 1. The scotch bond and silux group showed the least amount of apical leakage and the control group showed the greatest amount of apical leakage. 2. The groups retrofilled with cavity varnish and amalgam, glass-Ionomer cement, scotch bond and silux showed significantly good apical seal than control group. 3. The groups retrofilled with glass Ionomer cement, scotchbond and silux showed significantly good apical seal than the groups retrofilled with Amalgam and Zinc oxide eugenol cement.
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치근면에 항균 varnish 처치 전후의 치태 세균 및 치은열구액내 항체수준 변화에 관한 연구
권혁춘,도정욱 大韓齒科保存學會 1993 Restorative Dentistry & Endodontics Vol.18 No.2
In the prevention of root surface caries, antimicrobial therapy for the control of subgingival and supragingival plaque is seriously considered as a long term suppression of pathogenic microflora. Recently, varnishes containing antimicrobial agents have been developed to control the supragingival mocroflora. The purpose of this study was to determine the antimicrobial effects of 20% chlorhexidine varnish and 2.6% silane fouoride varnish with sealant. In clinical experiments, 12 subjects were selected from the periodontally treated patient and divided into 3 groups. after a dental prophylaxis, the subjects were treated with single application of placebo varnish(group 1), 20% cholrhexidine varnish(group II), and 2.6% silane fluoride varnish(group III). Root surface plaque samples were taken before(baseline)and one, two, four, and 8 weeks after the treatments. Microbiological examinations of root surface plaque were performed with culture study and indirect immunoflorescence(I.I.F) study, and immunological examination of gingival crevicular fluid antibody titers was performed with ELISA study. The results were as follows : 1. Pathogenic microflora on the root surface including S. murans, S. sanguis, s. mitis, A. naeslundii, A. viscosus were 24-37% on I.I.F. study. 2. S. mutans, S. sanguis, S. mitis, A. measlundii, A. viscosus of the root surface plaque was significantly reduced from I week to 8 weeks after antimicrobial varnish treatment, but showed generally increasing tendency in control group. 3. Gingival crevicular fluid antibody titers were significantly reduced from 1 or 2 weeks to 4 weeks after antimicrobial varnish treatment.
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