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KMID : 0362720050430120816
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Journal of the Korean Dental Association
2005 Volume.43 No. 12 p.816 ~ p.821
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The effects of flowable composite resin and incremental filling technique on microleakage of composite resin restoration
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Lee Hwa-Kyung
Lee Joo-Hee
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Abstract
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The purpose of this in vitro study was to evaluate the effect of flowable resin as a liner and incremental filling technique on microleakage of composite resin restoration.
Composite resin restoration has good esthetic value but its microleakage is often an unwanted postoperative result. To overcome the microleakage problem, flowable composite resin and incremental filling technique is currently recommended.
Fifty recently extracted human molars were prepared with standardized box-shaped class1 cavity with 6.0 mm in length, 2.5 mm in width, and 3.0 mm in depth. All specimens were randomly divided into five groups and tested. (n=10) ; Group 1 - Single Bond + Filetc P60; Group2-Single Bond + Filtec P60 + Filtec P60 (light cured seperately); Group3-Single Bond + Filtec flow + Filtec P60 (light cured seperately); Group4-Single Bond + Filtec flow + Filtec P60 +Filtec P60 (light cured seperately); Group5-Single Bond +Filtec flow + Filtec flow (light cured seperately).
After being immersed in tap water for 24h, the specimens were thermocycled(1000×, 5℃-55℃, 30 sec dwell time) and immersed in a 0.5% fuchsin solution for 24h. The restorations were sectioned mesio-distally and were evaluated for microleakage by using a 0-4 scale.
Data were subjected to the Tukey multiple comparisons test at p=0.05.
The results of this study were as follows ;
1. Although Group 2 performed slightly better than Group 1, no significant difference was observed between Group 1, 2(p>0.05).
2. A statistically significant difference between the groups of no-using flowable resin as liners(group 1,2) and the groups of using flowable resin as liners(group 3,4,5) was observed(p<0.05).
3. Although Group 4 performed slightly better than Group 3, 5, no significant difference was observed between Group 3, 4, 5(p>0.05).
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KEYWORD
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Flowable resin, Microleakage, Incremental filling, Bulk filling
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