Farah Naz, Muhammad Amin, Adeel Ahmed, Munawar Rahman.
Assessment of Microleakage of Three Restorative Materials in Class V Cavities. An in Vitro Study.
Med Forum Jan ;2(9):60-4.

Objectives: To evaluate the marginal microleakage in class V cavities restored with three different restorative materials using dye penetration scoring system. Study Design: Cross sectional study. Place and Duration of Study: This study was conducted at Dental Clinic laboratory, Juma building research laboratory, and Multidisciplinary laboratory, The Aga Khan University, Karachi for a period of six months from April 2008 to September 2008. Materials and Methods: One hundered and fifty extracted premolars were randomly selected. Standardized class V cavities were prepared and then divided into three equal groups: Group I was restored with composite resin, Group II with glass ionomer cement and group III with resin modified glass ionomers. They were then subjected to thermocycling, immersed in 2% methylene blue dye, sectioned and examined under dissection microscope. Dye penetration for each section was recorded and data was analyzed. Results: Lowest leakage was found in Group I (composite resin) and maximum in Group II (conventional glass ionomer). Microleakage at gingival margins was significantly more than that at occlusal margins in all groups. Conclusion: Composite resins and resin modified glass ionomers provide a better seal than glass ionomers in class V cavities. All materials show more microleakage at gingival margins as compared to occlusal margins.

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