Abstract
In the investigations of reinforcement of denture base polymethylmetacrylate resins with carbon fiber cloths, effects of thickness and number of the cloths on bending, tensile and impact strength, and safe limit evaluated from transverse-deflection value according to the American Dental Association (ADA) specification of the composite were studied. The composite specimens were fabricated with; 1) single sheets: 0.1, 0.2, and 0.4mm thick cloths pretreated by the epoxy resin (ECF) and by the lauroyl chloride (LOCF), 2) pile sheets: two and four sheets of 0.1mm thick ECF. In cases of ECF cloths, the physical properties of the composite resins increase with thickness and number of the CF pile sheets, while in cases of LOCF cloth these were unchanged. Based on the transverse-deflection values according to the ADA specification, it was recognized that the upper limit of thickness was 0.2mm ECF in cases of the single sheets, and that of number of the CF pile sheets was two in cases of the ECF sheet of 0.1mm thick.
