교정 브라켓 접착용 광중합 glass ionomer의법랑질 불소침투와 항우식 효과에 관한 연구

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교정 브라켓 접착용 광중합 glass ionomer의법랑질 불소침투와 항우식 효과에 관한 연구에 대한 보고서 자료입니다.

목차

교정 브라켓 접착용 광중합 glass ionomer의
법랑질 불소침투와 항우식 효과에 관한 연구
<제목차례>
국문초록
I. 서 론
Ⅱ. 연구 재료 및 방법
1. 연구재료
2. 연구방법
1) 대상치아의 처리와 분류
2) 브라켓 접착
3) 시편 제작
4) 보관 및 열순환(thermocycling)
5) EPMA에 의한 브라켓주변 법랑질 불소분포 측정
6) 내산성 varnish 도포
7) 브라켓주변의 인공우식 유발
Ⅲ. 연구성적
1. EPMA에 의한 브라켓 주변 법랑질의 불소농도
1) 선 분석(Line scanning analysis)
2) 점 분석(Point scanning analysis)
3) 면 분석(Real time area analysis)
2. 인공우식병소의 편광현미경 관찰
1) 우식양상
2)우식병소의 깊이
Ⅳ. 총괄 및 고안
Ⅴ. 결 론

<표차례>

<그림차례>

본문내용

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57. Wen H.B., Cui F.Z., Chen X.Q., Wang Q., Li H.D. : Structure of artificial enamel lesions after topical applications of high-concentration sodium fluoride solution in vitro. Caries Res. 29:122-129, 1995.
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ABSTRACT
Fluoride penetration into the enamel and anticariogenic
effect of a light-cured glass ionomer as a bracket adhesive
Joong-Chul Ahn, D.D.S., M.S.D.
Department of Pediatric Dentistry, Graduate School, Seoul National University.
( Directed by Prof. Se-Hyun Hahn )
The purpose of this study was to evaluate the anticariogenic effect of a light-cured glass ionomer cement used for direct bonding brackets. The effect of preventing initial caries, and the absorption of fluoride ions released from the cement into tooth substance surrounding the bracket were measured. The brackets were bonded to recently extracted human premolars; group 1 with a resin cement (Monolock 2, 3M, USA ) and group 2 with a light-cured glass ionomer cement (Fuji ortho LC, GC, Japan). After storage in 37℃ water for 2 weeks to allow penetration of fluoride, they were thermocycled 500 times at 5℃ / 55℃ with dwell time of 1 minute. The conce
ntration and distribution of fluoride penetrated into the enamel under and around the brackets were analyzed using EPMA.
Artificial caries were induced in tooth substance surrounding the brackets with an artificial lactic acid and they were observed using a polarized microscope to study the concentration and anticariogenic effect of fluoride surrounding tooth substance.
The following results were obtained:
1. In both groups, the concentration of fluoride within 20㎛ depth from the tooth surface underneath bracket were higher than the deeper place. There were almost constant fluoride concentration in the enamel deeper than 20㎛ depth in both groups. Within 10㎛ depth from the surface, the concentration of fluoride was higher in group 2.
2. Group 2 showed higher concentration of fluoride than group 1 in all spots starting from the edge of the brackets to 250㎛ distance at a depth of 5㎛.
3. The depth of caries lesion surrounding brackets was smaller in group 2 than group 1 when observed with a polarized microscope.
4. The group 1(113.9±21.6㎛) showed deeper lesions than group 2(87.3±20.2㎛) when the arti
ficial caries were induced in both groups. The difference was statistically signifiicant
(p < 0.05).
Key words : Glass ionomer, Fluoride, EPMA(Electron Probe Micro Analyzer),
Enamel caries
Student Number : 91851 - 821

키워드

글래스 아이오노머,   불소,   전자현미분석,   법랑질 우식