The Properties of LTV Vinyl Silicone Rubber as Resilient Denture Relining Material

- Change in Physical Properties and Adhesive Strength due to 5-year-long Storage in Water -

Abstract

In the previous report, we examined the change of the physical properties of LTV vinyl silicone rubber (Toray Silicone, CF5005) due to 3-month-long storage in water, and that of adhesive strength with methacrylate resin due to 2-month-long strorage in water, and obtained stable results in both cases.
But, to determine whether it is suitable for use as a resilient denture relining material, a longer test period is necessary. Therefore in the present studies, the specimens were stored in 37℃ water for 5 years (1979〜1983), the physical properties and adhesive strength with methacrylate resin were examined. The results are as follows:
1) No decrease in hardness, tensile strength, elongation and tear strength was observed.
2) Water absorption was extremely small, and there was no discoloration.
3) Decrease in adhesive strength with methacrylate resin was not noted.
4) From these results, it is appears that the present material shown excellent stability, even if it is used in the oral cavity for a long period.