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수종 복합레진 내의 bis-GMA와 TEGDMA의 구성비가 레진 인레이 법에 의한 부가적 열처리시 복합레진의 표면 및 내부의 중합률 변화에 미치는 영향

Other Titles
 CORRELATION BETWEEN BIS-GMA : TEGDMA RATIO AND DEGREE OF CONVERSION IN VARIOUS LAYERS OF COMPOSITE AFTER ADDITIONAL HEAT CURING 
Authors
 박성호  ;  정찬문 
Citation
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지), Vol.21(2) : 642-651, 1996-06 
Journal Title
Journal of Korean Academy of Operative Dentistry(대한치과보존학회지)
ISSN
 1225-0864 
Issue Date
1996-06
Abstract
The purpose of this study was to evaluate the relationship between monomer compositions and the changes in the degree of conversion in the various layers of composites after additional heat curing. Four types of composites and 3 types of inlay ovens were used in this study. Composite was placed in a 4-mm thick teflon mold, and light cured from the top for 60 seconds. Ten samples were prepared for each composite ; 5 of these were additionally heat cured in an inlay oven as the manufacturer recommended. After light curing or light and heat curing, the samples were sectioned into four parts and assigned to groups A, B, C, or D according to their distance from the light source. These sections were then thinned to 50-70μm, and these wafers were analyzed with a Fourier Transform Infrared Spectrometer(FI-IR) to determine the degree of conversion. A standard baseline technique was used to calculate the degree of conversion. $^{13}C$ NMR spectra of bis-GMA, TEGDMA and bis-EMA, were acquired using a Varian Gemini spectrometer operated at 200 MHz. CDCl₃ solvent was used for qualitative analysis. The degree of conversion was affected by bis-GMA : TEGDMA ratio but it seemed to be also affected by other factors. When the composites were heat cured, significant increases in the degree of conversion were noted throughout the samples, but the amount of increase differed between materials. Thus, clinical performance of a heat-treated composite inlay may be different depending on materials.
Files in This Item:
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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/22282913/183245
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