Influence of a Thickness and Processing Method on the Linear Dimensional Change and Water Sorption of Denture Base Resin

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Abstract

The purpose of this study was to evaluate the influence of a thickness and processing method on linear dimension change and water sorption in a denture base resin after storage in water for 24 hours, one week, and four weeks.<br>Sixty wax specimens 65mm long and 10mm wide were fabricated in three thicknesses, 1.5, 3, and 4.5mm. Three dimples were made in each wax specimen. A travelling microscope was used to measure the total distance from the uppermost dimple to the lowest dimple to the nearest 0.01mm.<br>Acrylic resin blocks were polymerized with 2 processing cycles (short and long-cured). Immediately after processing, all samples were measured by the same investigator. They were then weighed by an electronic precision balance capable of measuring to 0.001g.<br>Data were analyzed by analysis of variance. Thickness and time of storage were statistically significant on the dimensional change (linear and weight changes) of denture-base resin (p<0.01), showing the influence of the processing method.

Journal

  • Dental Materials Journal

    Dental Materials Journal 23 (1), 8-13, 2004

    The Japanese Society for Dental Materials and Devices

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