기성금관수복 유구치의 변연 적합도에 관한 연구
A study on marginal adaptation of ready-made stainless steel crown to the primary molar
이선경, 이광수, 이종엽,
소속 상세정보
이선경 ( ) - 서울대학교
이광수 ( ) - 서울대학교
이종엽 ( ) - 서울대학교
KMID : 0358919960230020389
Abstract
In Class II amalgam restoration in deciduous molar, failure rate and incidence of recurrent caries are high as cildren become older. In order to preserve deciduous molars till the physiologic exfoliation time, stainless steel crown is a choice of
the
treatment.
As a result of a careless treatment, such as overhanging margin, poor marginal adaptation, poor proximal contour and inadequate mesiodistal width give rise to interfering eruption of the adjacent teeth, recurrent caries and chronic gingival
irritation
and insufficient arch length respectively. In this study, 252 s.s. crowned teeth extracted due to physiologic exfoliation or periapical lesion. The purpose of this study is to analyze the marginal adaptation of stainess steel crown to the
deciduous
molar in order to obtain better clinical result.
@ES The results were as follows :
@EN 1. Between the length of s.s. crown and the marginal gap of crown, positive correlations were shown.
2. Largest amount of marginal gap was shown at buccal side in upper deciduous molars and lower first deciduous molar, lingual side in lower second deciduous molar. But no significant diffrence were found statistically compared to second most
largest
one.
3. Incidence of exposed restoration and recurrent caries were higher in proximal surface than buccal/lingual surface. And extension of restoration below the margin of s.s. crown gives rise to higher rate of recurrent caries.
4. Defect of contour was found in 34%, frequently found in lower 1st deciduous molar and upper 1st deciduous molar.
5. Marginal polishing defects were found in 23%.
6. Ledge was formed in 10% especially in lower 1st deciduous molar and lower 2nd deciduous molar.
7. 16% of the teeth had wear facet due to traumatic occlusion, 7% of them had occlusal perforation.
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