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KMID : 0362319920170010191
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Journal of Korean Academy of Operative Dentistry
1992 Volume.17 No. 1 p.191 ~ p.205
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A study on the marginal leakage of classⅡcomposite resin inlay
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Abstract
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The purpose of this study was to evaluate the microleakage of class II composite resin inlays and compare them with the conventional light-cured resin filling restorations.
Class II cavities were prepared in 60 extracted human molars with which cervical margins were located below 1.0mm at the cemento-enamel junction using No. 701 tapered fissure carbide but.
All of the prepared cavities were restored as follows and divided into 6 groups.
Group 1 and 2 were restored using direct filling technique and group 3, 4, 5 and 6 were restored using direct inlay technique that was cemented with dual-cured resin cements.
Group 1: Cavities were restored with light-curing composite resin, Brilliant Lux.
Group 2: Cavities were restored with light-curing composite resin, Clearfil Photo Posterior.
Group 3: Cavities were restored with Clearfil CR Inlay and heat treated at 125℃ for 7 minutes.
Group 4: Cavities were restored with same material as group 3 and heat treated at 100℃ for 15 minutes.
Group 5: Cavities were restored with Brilliant (Indirect esthetic system) and heat treated at 125℃ for 7 minutes.
Group 6: Cavities were restored with same material as group 5 and heat treated at 100℃ for 15 minutes.
All specimens were polished with same method and thermocycled between 6℃ and 60℃, then immersed in a bath of 2.0% aqueous solution of basic fuchsin dye for 24 hours.
Dyed specimens were sectioned longitudinally and dye penetration degree was read on a scale of 0 to 4 by Tani and Buonocore's method 45).
@ES The results were as follows:
@EN 1. Microleakage was observed rather at the cervical margins than at the occlusal margins in all groups.
2. Composite resin inlay groups showed significantly less leakage than direct filling groups at the cervical margins (p<0.001).
3. In composite resin inlay groups, there was no significant difference in microleakage between specimens by heat treating temperature and time (p>0.05).
4. There was no significant difference in leakage between each groups at the occlusal margins (p>0.05).
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