Abstract
ABSTRACT:
 “AIM: To assess the effect of three lining materials; flowable composite, flowable compomer, and light-curing glass ionomer cement (LCGIC) on microleakage in Class V restoration using packable composite restorations.
 MATERIALS AND METHODS: A standardized class V cavity was prepared on buccal surface of 40 young premolar teeth with the cervical margin extending 0.5 mm below the cementoenamel junction, into the dentin. All the samples were randomly divided into 4 groups according to the lining material used: Group I- Control; Group II- flowable composite; Group III- LCGIC and Group IV- flowable compomer. The restored teeth were thermocycled and immersed in 2% methylene blue solution for 24 hours. Each tooth was then sectioned along buccolingual direction. The dye penetration of the occlusal and gingival margins of each section was evaluated by a single observer using a stereomicroscope and statistically analyzed using Kruskal Walis Test and Mann-Whitney U Test.
 RESULT: Maximum dye penetration score for Group 1, Group 2 was 3 and Group 3, Group 4 was 1. (p<0.05)
 CONCLUSION: Flowable compomer and light cure glass ionomer cement as intermediate lining material can reduce microleakage under packable composite.
 Keywords: Compomer, flowable composite, light-curing glass ionomer cement, microleakage, packable composite.”
Highlights
Composite resin has always been the most popular restorative material in anterior teeth owing to its aesthetically pleasing nature
The shrinkage of composite during polymerization threatens the marginal integrity, leading to microleakage due to marginal gap formation. This leads to failure of restoration in the form of postoperative sensitivity, secondary caries, fracture, marginal deterioration and discoloration
Adequate marginal seal is of utmost importance for provision of desired longevity of the restorations.[2,3]
Summary
Composite resin has always been the most popular restorative material in anterior teeth owing to its aesthetically pleasing nature. The shrinkage of composite during polymerization threatens the marginal integrity, leading to microleakage due to marginal gap formation. This leads to failure of restoration in the form of postoperative sensitivity, secondary caries, fracture, marginal deterioration and discoloration. Adequate marginal seal is of utmost importance for provision of desired longevity of the restorations.[2,3]. When the restoration margins are in enamel, microleakage is not a major problem as bonding with enamel is reliable. When they lie on dentin or cementum, a complete and long-lasting seal is difficult to obtain.[4,5]
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