J Korean Acad Conserv Dent.  2005 Sep;30(5):363-371.

The effect of marginal microleakge according to thickness of flowable resin

• Song GG
• Cho YG

Abstract

This study investigated the effect of thickness of flowable resin lining on marginal leakage in class II composite restorations. 80 experimental teeth were prepared with class II preparations with enamel margin or dentin margin. Each group was devided into four groups according to flowable resin lining thickness ; Control group - no flowable resin lining, Group 1 - 0.5 mm flowable resin lining, Group 2 - 1 mm flowable resin lining, Group 3 - 2 mm flowable resin lining. The cavities were restored using Scotchbond Multi-Purpose adhesive system, Filtek Flow and Filtek Z 250 composite resin. Following one day storage in distilled water, the restored teeth were thermocycled for 500 cycles and immersed in 2% methylene blue for 24 hours. The results of this study were as follows: 1. Ranking of mean microleakage scores at the enamel margins was Group 1 < Control = Group 2 < Group 3. The microleakage of Group 3 was significantly higher than that of Control, Group 1 and Group 2 (p < 0.05). 2. Ranking of mean microleakage scores at the dentin margins was Group 1 < Group 2 < Control < Group 3. The microleakage of Group 3 was significantly higher than that of Control, Group 1 (p < 0.05). 3. Compared with microleakage between the enamel and dentin margins, enamel margin group were significantly lower than dentin margin group.

Keyword

Flowable resin; Lining; Thickness; Class II cavity; Gingival margin; Microleakage

MeSH Terms

Adhesives
Dental Enamel
Dentin
Methylene Blue
Tooth
Water
Adhesives
Methylene Blue
Water

Figure

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  Figure 1 Numbers of leakage scores of each group at enamel margins.

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  Figure 2 Numbers of leakage scores of each group at dentin margins.

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