A lining system for composite resin fillings.
Microleakage at the margins is a major problem with composite resin fillings. This study was performed to determine whether a liner that expands on contact with water could prevent leakage. A microfilled composite resin that has a high rate of contraction (taking place while curing) was used in class V cavities of extracted teeth. An experimental liner containing aluminosilicate crystals was painted on the dentin walls before insertion of the filling material. The specimens were thermocycled and sectioned. Class V fillings were also placed in the teeth of beagles. The teeth were extracted after 14 weeks. The depth to which the dye penetrated was measured microscopically. Results showed that the expanding liner almost completely prevented penetration of the dye in both in vitro and animal experiments.
Derand
T
T
Department of Technology and Dental Materials, University of Lund, School of Dentistry, Malmo, Sweden.
D000293:Adolescent; D000538:Aluminum Silicates; D000818:Animals; D002126:Calcium Hydroxide; D002197:Capillary Action; D003188:Composite Resins; D003736:Dental Cavity Lining; D003763:Dental Leakage / Q000517:prevention & control*; D004285:Dogs; D006801:Humans; D013499:Surface Properties
D000538:Aluminum Silicates; D003188:Composite Resins; C049037:aluminosilicate; D002126:Calcium Hydroxide