Journal of the Korean Academy of Pediatric Dentistry 1996;23(4):906-914.
Published online November 30, 1996.
A COMPARATIVE STUDY OF MICROHARDNESS OF DUAL-CURE AND LIGHT-CURE PIT AND FISSURE SEALANT
 
이중중합 치면열구 전색제와 광중합 치면열구 전색제의 미세경도에 관한 비교연구
이광수, 김형두, 이상훈
서울대학교 치과대학 소아치과학교실
Abstract
Due to the various reason, sealing of pit & fissure might be imperfect. One of these reason can be the fracture of sealant material because of the low hardness value of sealing material. The purpose of this in vitro study was to evaluate the microhardness of two different curing type pit and fissure sealants: Dual-cure and Light-cure. The result from the present study can be summarized as follows: 1. All pit and fissure sealants that used in this study showed statistically significant difference in their microhardness of upper and lower surface. (P <0.05) 2. Except of lower surface of teethmate, microhardness of 40-second curing sealant was statistically higher than that of 20-second curing sealant. (P <0.05) 3. In comparison of sealants, microhardness of dual-cure sealant was statistically higher than that of light-cure sealant. Above results suggest that the use of dual-cure sealant and longer curing time are recommended.


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