Water sorption of heat-polymerized acrylic resins processed in mono and bimaxillary flasks

Brazilian Dental Journal

Carolina B. Meloto¹  Laís R. Silva-concílio¹  Cristiane Machado¹  Margarete C. Ribeiro¹  Fábio A. Joia¹  Célia M. Rizzatti-barbosa¹ 

[1] ,State University of Campinas Faculty of Dentistry of Piracicaba Department of Prosthesis and PeriodontologyPiracicaba SP ,Brazil

关键词: acrylic resin;    flask;    water sorption;   

DOI  :  10.1590/S0103-64402006000200007

来源: SciELO

【 摘 要 】

This study evaluated water sorption in heat-polymerized acrylic resins processed in monomaxillary flasks by water bath and in bimaxillary flasks by microwave energy and water bath. Fifty heat-polymerized acrylic resin specimens were fabricated according to the 12th specification of the American Dental Association and assigned to 3 groups: group 1 was processed by water bath in monomaxillary metallic flask; group 2 was processed by microwave energy in bimaxillary PVC flask; and group 3 was processed by water bath in bimaxillary metallic flask. Specimens were submitted to water sorption test, means were calculated and analyzed statistically by Student's t-test. Means (in g/cm³) were: group 1 - 0.024085, group 2 - 0.025312 and group 3 - 0.022098. Microwave energy processing and the amount of stone and resin used in the bimaxillary PVC flask did not influence water sorption; specimens processed in bimaxillary metallic flask by water bath presented lower water sorption means, suggesting an inadequate polymerization of the acrylic resin mass.

【 授权许可】

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