Journal of the Korean Academy of Pediatric Dentistry 2007;34(2):204-214.
Published online May 31, 2007.
COMPARISON OF MICROLEAKAGE IN SEALANT REPAIRED WITH DIFFERENT SURFACE TREATMENT
서울대학교 치과대학 소아치과학교실 및 치학연구소 
파손된 치면열구전색제의 수리 방법에 따른 미세누출 비교
강명봉, 현홍근, 김영재, 김정욱, 장기택, 이상훈, 한세현, 김종철
서울대학교 치과대학 소아치과학교실 및 치학연구소
Correspondence:  , 
Abstract
The aim of this study was to investigate whether differences in surface treatment prior to repair influenced the seal of a resin fissure sealant placed on the occlusal surfaces of permanent molar teeth. One hundred and twenty extracted human molars were selected and a light curing sealant was placed on their occlusal surface following cleaning by prophylaxis and acid etching. The teeth were deliberately damaged, and then stored in artificial saliva for four weeks. Sixty teeth with the desired morphology of sealant failure were randomly divided into four groups where one group was treated with only etching agent, another by only air-abrasion, another by applying an etching agent followed by a bonding agent, and the last by air-abrasion followed by a bonding agent each. After sealant application, the samples were thermocycled and the degree of microleakage was determined. The results were as follows : 1. In the sealant/sealant interface group 2(0.22), 4(0.23) using air-abrasion showed a significantly lower microleakage score than group 1(0.38), 3(0.35) using an etching agent(p<0.05). There were no statistically significant differences(p>0.05) between groups 1, 2 and groups 3, 4. 2. In the sealant/tooth interface, group 3(0.20), 4(0.20) which used a bonding agent showed a significantly lower microleakage score than group 1(0.35), 2(0.40) (p<0.05). There were no statistically significant differences(p>0.05) between groups 1, 3 and groups 2, 4. 3. In SEM examination, while sealant surfaces treated with etching did not result in highly rough surfaces, those treated with air-abrasion did show rough surfaces.
Key Words: Sealant; Repair, Acid etching, Air-abrasion, Microleakage


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