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수복용복합레진의 표면처리방법에 따른 표면중합률 및 변색정도의 변화와 그 상관관계에 대한 연구

Other Titles
 THE CHANGE IN SURFACE CONVERSION AND DISCOLORATION IN DENTAL RESTORATIVE COMPOSITE RESIN UNDER DIFFERENT POLISHING METHODS; THE CORRELATION BETWEEN SURFACE CONVERSION AND SURFACE DISCOLORATION 
Authors
 박성호  ;  노병덕  ;  김모란  ;  안현정 
Citation
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지), Vol.25(3) : 482-486, 2000 
Journal Title
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지) 
ISSN
 1225-0864 
Issue Date
2000
Keywords
composite ; discoloration ; celluloid strip ; microhardness ; oxygen inhibition
Abstract
The purpose of the present study was first, to evaluate the relationship between composite surface conversion and surface discoloration, second, to know if there was difference in surface discoloration between celluloid-strip-finished composite surface and polished surface. In addition, the discoloration of composite surface was also evaluated with visual inspection or digital camera with high resolution monitor, Z100, Tetric Ceram, Spectrum, and Aelitfil were used. The composite surfaces were celluloid-strip finished (group 1), polished (group 2), celluloid-strip finished under nitrogen gas purging (group 3) or only light cured without finishing or polishing under nitrogen gas purging (group 4). The microhardness of each samples were also measured in each group. The samples of each group were also divided into 4 subgroup whether they were immediately placed in disclosing solution (0.2% Elythrosin, pH 7.0) (subgroup1), 1 day after light curing(subgroup 2), 3day after light curing(subgroup 3) or 7 day after light curing(subgroup 4). The computer controlled spectrophotometer was used to determine CIELAB coordinates ( L ∗ L∗ , a ∗ a∗ , b ∗ b∗ ). The amounts of color difference were compared. The results were as follows; 1. There was no difference in discoloration between celluloid strip finished composite surface and polished surface. 2. The samples discolored more when they were placed in disclosing solution immediately after polymerization than other groups. 3. When the samples were light cured under nitrogen gas purging and without polishing process, they discolored more than other groups even though they showed higher micro hardness. 4. With visual inspection or digital camera, only a limited information was available in detecting composite surface discoloration.
Files in This Item:
T200002018.pdf Download
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Park, Sung Ho(박성호) ORCID logo https://orcid.org/0000-0003-2171-235X
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/172366
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