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Microleakage of Class V composite, resin sandwich, and resin-modified glass ionomers
R D Trushkowsky1, A J Gwinnett
1Staten Island University Hospital, New York, USA.
Purpose:
To evaluate in vitro the extent of microleakage of Class V cavities restored with composite, and resin-modified glass ionomers.
Materials And Methods:
Class V cavities were prepared in 35 extracted teeth and randomly divided into seven groups of five teeth each (10 restorations in each group). Group 1: Scotchbond Multi-Purpose Adhesive (SMP) and restored with Z100 resin placed with an incremental technique, Group 2: Lined with GC Fuji lining LC and restored with SMP and Z100. Group 3: Based with Fuji II light-cured glass ionomer restorative and restored with SMP and Z100. Group 4: Lined with Vitrebond and restored with SMP and Z100. Group 5: Based with Vitremer and restored with SMP and Z100. Group 6: Restored with Fuji II LC. Group 7: Restored with Vitremer. The teeth were subjected to thermocycling, stained with silver nitrate, then longitudinally sectioned. Dye penetration at the tissue/restoration interface was scored based upon the extent and location of the precipitated silver.
Results:
All groups demonstrated minimal or no microleakage at both the enamel and gingival sites.