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5급와동 복합레진 수복에서 충전방법이 변연누출에 미치는 영향에 관한 실험적 연구
이상호,손흥규 大韓小兒齒科學會 1987 大韓小兒齒科學會誌 Vol.14 No.1
The purpose of this study was to evaluate the marginal leakage of class V composite resin restorations by the changing insertion method. THe cavities were filled with two composite resin systems in accordance with following four insertion methods, first, incremental with pressure, second, incremental without pressure, third, single incremental with pressure, and fourth, single incremental without pressure. The composite resin systems used in this study were ??/??(3M Co.) which were light cured, and ??/?? which were chemically cured. All procedures were directed by manufacturers' recommendations. All specimens were thermocycled by alternatly immersing them in water at 4℃ and 60℃ for 100 cycles. They were immersed in 0.5% Methylene Blue solution for 24 hours, and sectioned buccolingually through the restorations with diamond disk into two parts. The sectioned specimens were observed with light microscopy. The following results were obtained. 1. No significant difference in the degree of marginal leakage was observed among insertion methods in ?? and ?? groups at the occlusal margins. 2. At gingival margins in ?? groups, incremental subgroups show less marginal leakage compared with single incremental subgroups and show significant difference between them. (P<0.05) 3. At gingival margins in ?? Groups, pressure subgroups show less marginal leakage compared with non-pressure subgroups and show significant difference between them. (P<0.05) 4. At occlusal margins, ?? and ?? Groups show less marginal leakage compared with gingival margins in all insertion methods and show significant difference between them. (p<0.05)
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