Setting Characteristics of Silicone-based Resilient Denture Liners

Abstract

The aim of this study was to investigate the setting characteristics of seven silicone-based resilient denture liners during setting. Maximum extrusion force -at the flow rate of 1cm/min- ranged from 0.183 to 1.26MPa. Working time and setting time ranged from 2.0 to 5.0 minutes and 1.9 to 6.8 minutes respectively. Consistency as described in JIS T6519-2000 was 32.4 to 46.5mm. As normal load of 1kgf was applied to a specimen held between two glass plates after mixing, the time at which film thickness reached up to 1mm was 4.0 to 13.0 minutes at 23°C and 2.2 to 5.5 minutes at 37°C. These results suggested that the reaction rate of materials used in this study differed from one brand to another. Against this backdrop of differing reaction rates amongst brands, it is therefore vital that a denture liner material's setting characteristics be carefully considered whenever it is used in clinical dentistry to prevent any undesirable or unexpected results and outcome.