광중합형과 자가중합형 글라스 아이오노머시멘트의 변연 접합성에 관한 연구
A Study on the Adaptation of Light-Cured and Self-Cured Glass-ionomer Cements to Tooth Structure
박일윤, 조영곤, 허승면,
소속 상세정보
박일윤 ( Park Yil-Yoon ) - 조선대학교 치과대학 보존학교실
조영곤 ( Cho Young-Gon ) - 조선대학교 치과대학 치과보존학교실
허승면 ( Hur Seung-Myun ) - 조선대학교 치과대학 보존학교실
KMID : 0353319930170020405
Abstract
The purpose of this study was to compare the adaptation to tooth structure of light-cured glass ionomer cement with that of self-cured glass ionomer cement.
In this study. Class V cavities were prepared on the buccal surfaces of 10 extracted human premolar teeth, and teeth were randomly assigned 2 groups of 5 teeth each. The cavities of self-curing glass ionomer cement group were restored with the
Fuji
II,
and the cavities of light-curing glass ionomer cement group were restored with the Fuji II LC. The surfaces of glass ionomer cements were applied with All-Bond 2 adhesive, and cured with visible light.
The restored teeth were stored in 100% relative humidity at 37℃ for 24 hours. And then, the roots of the teeth were removed with the tapered fissure bur and the remaining crowns were sectioned occlusogingivally through the center of glass
ionomer
restorations.
Adaptation at tooth-restoration interface was assessed occlusallyt, axially, and gingivally by scanning electron microscope.
@ES The results were as follows:
@EN 1. On the occlusal margin, the group of self-curing glass ionomer cement showed closer adaptation to both enamel and dentin than the group of light-curing glass ionomer cement showing 5μm gap between cement and tooth structure.
2. On the axial wall, the group of light-curing glass ionomer cement showing 5-7μm gap between cement and dentin showed closer adaptation to dentin than the group of self-curing glass ionomer cement showing 10-15μm gap between cement and
dentin.
3. On the gingival margin, the group of light-curing glass ionomer cement showing 2-5μm gap between cement and dentin(X 1200) showed closer adaptation to dentin than the group of self-curing glass ionomer cement showing 20μm gap between cement
and
dentin(X 600).
4. The group of self-curing glass ionomer cement showed closer adaptation on the occlusal margin than on the gingival margin, and the group of light-curing glass ionomer cement showed similar adaptation on both occlusal and gingival margins.
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