Effects of Thixotropic Agent on the Fluidity of Silicone Materials

DOI
  • OKI Meiko
    Department of Basic Oral Health Engineering, Medical and Dental Sciences and Technology Track, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University （TMDU）
  • KAZAMA Haruka
    Course for Oral Health Engineering, School of Oral Health Care Sciences, Faculty of Dentistry, Tokyo Medical and Dental University （TMDU）
  • TAKAHASHI Hidekazu
    Department of Oral Biomaterials Development Engineering, Medical and Dental Sciences and Technology Track, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University （TMDU）
  • SUZUKI Tetsuya
    Department of Oral Prosthetic Engineering, Medical and Dental Sciences and Technology Track, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University （TMDU）

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Other Title
  • 粘度調整剤によるシリコーン材料の流動性への影響

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Abstract

In the intrinsic coloring technique of facial prostheses, it is necessary to laminate an appropriate quantity of silicone materials on the appropriate place. A thixotropic agent （TA） was applied to silicone materials to improve their high fluidity. The aim of this study was to evaluate the effects of the amount of TA on the fluidity of a maxillofacial silicone （A-2186） and two silicone materials （KRS-10-2, KRS-C2-2）. Specimens for A-2186 and KRS-10-2 were prepared with different amounts of the corresponding TA: from 0 to 3 drops for 10 g of base silicone. 0.1 g of mixed silicone was placed on a glass plate and then the plate was positioned horizontally or vertically. The horizontal diameter and the vertical length of each specimen were measured until 15 minutes after the start of mixing. A load of 14.7 N was applied to the glass plate over 0.5 ml mixed silicone for the consistency test, and the diameter of silicone after 15 minutes was measured. All silicone materials without TA showed high fluidities, while all silicone materials mixed with more than 0.4 drops showed low or no fluidity. These results suggested that a small amount of thixotropic agent is effective to improve the fluidity.

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