Abstract
Most of the materials such as silicone elastomer for facial prostheses are imported to Japan. We have been developing two novel silicone materials for facial prostheses: one is used by mixing Part A and Part B in a 10 : 1 ratio by weight （KRS-10）, and the other is filled in a 1 : 1 cartridge （KRS-C1）. The viscosities, viscoelastic properties, Shore A durometer hardness, elastic distortion and tensile properties were investigated. KRS-10 showed a lower viscosity, which suggested that it could be mixed easily. It also showed sufficient working time and sharp setting. After curing, the material became flexible and stretchable. KRS-C1 would be easy to use because there is no need for measurement, mixing and defoaming, though it had a higher viscosity than KRS-10. KRS-C1 had high tensile strength, but seemed to be too hard to use for facial prostheses; further modification is required.
