10 16

Cited 0 times in

아르곤 레이저를 이용한 광중합 수복재의 물리적 성질에 관한 연구

Other Titles
 A study on the physical properties of restorative materials for photo-polymerization of argon laser 
Authors
 주상호  ;  최형준  ;  김성오  ;  이종갑 
Citation
 Journal of the Korean Academy of Pediatric Dentistry (대한소아치과학회지), Vol.25(2) : 368-382, 1998 
Journal Title
 Journal of the Korean Academy of Pediatric Dentistry (대한소아치과학회지) 
ISSN
 1226-8496 
Issue Date
1998
Abstract
The purpose of this study is to evaluate and compare the results of argon laser for 5 seconds, argon laser for 10 seconds, and visible light for 40 seconds photo-polymerization in compressive strength, microhardness, curing depth, temperature rising during polymerization, and polymerization shrinkage. Hybrid type composite resin(Z-100) and compomer(Dyract) were used to be compared. The comparessive strength was measured by an Instron(1 ㎜/min cross head speed) in 60 specimens and the microhardne ss of the surface was expressed by Vickers Hardness Number(VHN) in 30 specimens. The curing depth was evaluated comparing the different values of upper and lower VHN according to irradiation time and thickness for the light source polymerization in 60 specimens. The temperature rising during photopolymerization was observed by the temperature changer with thermocouple sensitizxer beneath 40 specimens at the argon laser for 10 seconds and visible light 40 seconds irradiation. The polymerization shinkage was evaluated by calculationg the decrease of % volume by using a dilatometer in 30 specimens. The results were as follows ; 1. In the case of compressive strength, the argon laser polymerization groups were higher than visible light group in Z-100(p<0.05). In Dyract, the argon laser 5 seconds group did not show a significant difference with the visible light 40 seconds group. The argon laser 10 seconds group showed the markedly low value when compared with other groups(p<0.05) 2. In microhardness, Z-100 was better than Dyract when comparing by VHNs (p<0.05); however, there was not a significant difference between two materials in the visible light 40 seconds group and the argon laser 10 seconds group. 3. In the study of curing depth, Z-100 showed the consistent polymerization in argon laser irradiation because there was no difference in the VHN decrease according to the thickness change. Over the thickness control, the results did not show a significant difference between visible light and argon laser group in Z-100 ; however, in the case of Dyract, the visible light 40 seconds group was better than the argon laser groups(p<0.05). 4. There was a significant difference between the two materials in temperature rising during polymerization(p<0.05), but not a significant difference between irradiation times. 5. There was not a significant difference between the two materials in polymerization shrinkage. The argon laser 5 seconds group was smaller than the other groups (p<0.05). It could be concluded that Z-100 polymerization was recommended to use the argon laser for reduction of the irradiation time while Dyract was recommended to use the visible light polymerization.
Files in This Item:
T199801139.pdf Download
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Pediatric Dentistry (소아치과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Seong Oh(김성오) ORCID logo https://orcid.org/0000-0002-8620-1377
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/176364
사서에게 알리기
  feedback

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse

Links