대한소아치과학회지 (Journal of the korean academy of Pediatric Dentistry)
- 제32권3호
- /
- Pages.481-490
- /
- 2005
- /
- 1226-8496(pISSN)
- /
- 2288-3819(eISSN)
적층충전법이 복합레진의 중합수축에 미치는 영향
EFFECT OF INCREMENTAL FILLING TECHNIQUE ON THE POLYMERIZATION SHRINKAGE OF COMPOSITE RESIN
- 김효석 (조선대학교 치과대학 소아치과학교실) ;
- 이난영 (조선대학교 치과대학 소아치과학교실) ;
- 이상호 (조선대학교 치과대학 소아치과학교실) ;
- 오유향 (조선대학교 치과대학 소아치과학교실)
- Kim, Hyo-Suk (Department of Pediatric Dentistry, College of Dentistry, Chosun University) ;
- Lee, Nan-Young (Department of Pediatric Dentistry, College of Dentistry, Chosun University) ;
- Lee, Sang-Ho (Department of Pediatric Dentistry, College of Dentistry, Chosun University) ;
- Oh, You-Hyang (Department of Pediatric Dentistry, College of Dentistry, Chosun University)
- 발행 : 2005.08.31
초록
본 연구는 복합레진 중합 시 발생되는 중합수축이 C-factor에 의해 어떻게 영향 받는지 그리고 적층충전이 중합수축에 어떻게 영향을 미치는지 알아보고자 시행되었다. 세 가지 다른 깊이의 시편을 비교하였으며, 충전방법에 따른 비교를 위해 5가지 다른 충전방법에 따른 수축응력을 스트레인 게이지(Strain guage)를 사용하여 측정하였다. 이상의 실험을 통해 얻은 결과는 다음과 같다. 1. 와동깊이에 따른 수축응력을 측정한 결과 2mm와 3mm 시편에서는 800초 후 수축응력이
The aim of this study was to investigate the relationship between the C-factor and shrinkage strain values of composite resin and examine the strain values in different incremental filling techniques. The strain gauge method was used for measurement of polymerization shrinkge strain. Experiment was divided two step. In a first experiment, we compared with strain value in three different depth (2mm, 3mm, 4mm) and microhardness of each samples after 24hours were measured. In a second experiment, we examined the strain values in five different filling techniques(Group 1: bulk filling, Group 2: oblique incremental filling, Group 3: horizontal incremental filling, Group 4: vertical incremental filling, Group 5: lining of flowable resin and bulk filling) The results of the present study can be summarized as follows: 1. Composite resin in acrylic molds showed the initial expansion at the early phase of polymerization. 2. Contraction stress was not revealed significant difference between depth of 2mm and 3mm(P>0.05). 3. Contraction stress in sample of 4mm was showed the lowest value(P<0.05). 4. Microhardness of specimen was revealed more difference between upper and lower surface in depth of 4mm than 2 and 3mm(P<0.05). 5. Lining of flowable resin and bulk filling (Group 5) was showed the lowest contraction stress, Group 2 and 3 was showed the highest contraction stress(P<0.05). On the basis above results, the stress that result from the polymerization shrinkage, when incremental curing techniques are used, showed that there is no advantage in incremental placement and curing.