Firtell D N, Donnan M L, Anderson C R
J Prosthet Dent. 1976 Nov;36(5):544-9. doi: 10.1016/0022-3913(76)90304-8.
Weight is a problem in retention of large skin-textured maxillofacial prostheses. The purpose of this investigation was to test the feasibility of mixing foam RTV silicone rubber with conventional RTV silicone rubber to obtain a light-weight material. Various mixtures of foam and conventional silicone rubber were formulated and tested for strength, accuracy of molding, color application, color stability, and texture. A special flask to support the mold was necessary in order to overcome expansion problems associated with gas formation of the foam silicone rubber. The mold required venting to release the gas and to reduce the expansion of the prosthesis in order to maintain accuracy. Molding, accuracy, texture, and color problems were overcome. Reduction of weight proportionate to reduction of tear strength of the material formulated, however, did not allow routine use of mixtures of foam and conventional silicone. When the weight of a prosthesis is critical and excessive and thickness is sufficient to give adequate strength, the foam and conventional silicone mixture can be used.
重量是大型皮肤纹理化颌面修复体固位的一个问题。本研究的目的是测试将泡沫RTV硅橡胶与传统RTV硅橡胶混合以获得轻质材料的可行性。配制了各种泡沫和传统硅橡胶的混合物，并测试了其强度、成型精度、颜色应用、颜色稳定性和质地。为了克服与泡沫硅橡胶气体形成相关的膨胀问题，需要一个特殊的铸型来支撑模具。模具需要排气以释放气体并减少修复体的膨胀，以保持精度。成型、精度、质地和颜色问题均得到解决。然而，与所配制材料的撕裂强度降低成比例的重量减轻，不允许常规使用泡沫和传统硅橡胶的混合物。当修复体的重量至关重要且过大，且厚度足以提供足够强度时，可以使用泡沫和传统硅橡胶的混合物。
