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J Korean Acad Pediatr Dent. 2005;32(4): 604-610.
MICROLEAKAGE IN RESIN COMPOSITE POLYMERIZED WITH VARIOUS LIGHT CURING UNITS
박성진, 김대업, 이광희
원광대학교 치과대학 소아치과학교실 치의학연구소
Corresponding Author: 이광희 ,
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ABSTRACT
This study was to evaluate the effects of several light curing units on the microleakage of composite resin restorations in primary teeth. The types of curing units were traditional low intensity halogen light(Optilux 360), plasma arc light(Filpo) low heat plasma arc light(Aurys) and high intensity LED(Freelight 2). After preparing cavities on sound primary teeth, cavities were filled with composite resin(Z100) using the same resin bond agent(Scotchbond Multi-Purpose) and were cured with each curing light system. After storing each specimen in sterile water for 24 hours, thermal circulation was done 1,000 times followed by pigmentation using 2% methylene blue solution. Each specimen was sliced and the degree of pigmentation was graded. When microleakage is graded, the average of Aurys was 0.95 which was the lowest and Freelight 2(1.05), Filpo(1.25), Optilux 360(1.30) followed. But values were not shown statistically significant difference (P>0.05). The results suggest that the newly developed curing units which has advantage in children by decreasing discomfort and procedure time can increase the microleakage of the composite resin.
Keywords: Light curing | Microleakage | Primary teeth
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