Evaluation of two different reinforcing materials used with silicone auricular prostheses

ObjectiveClinical and laboratory evaluation of the effect of addition of polyurethane sheets or polypropylene fibers as reinforcing materials to silicone that was used in auricular prostheses.Materials and methodsFifteen patients with a history of acquired auricular defects were divided into three equal groups. Group I patients received silicone prostheses (control group), Group II patients received silicone prostheses lined with polyurethane sheets, and Group III patients received silicone prostheses reinforced with polypropylene fibers. The final prostheses were made from medical grade silicone rubber (RTV, MDX4-4210). The basic principles for construction of successful auricular prosthesis were followed.ResultsClinical evaluation of this study revealed an acceptable and well tolerated use of modified silicone ear prostheses either silicone lined with polyurethane sheets or silicone reinforced with polypropylene fibers.ConclusionNone of the tested prostheses showed any clinically detrimental effects on the underlying tissues. Reinforcing silicone with polyurethane sheets and polypropylene fibers improved the tear strength, tensile strength and modulus of elasticity thus providing better marginal integrity and durability of prostheses. Addition for modifying the silicone as a famous maxillofacial prosthetic material seems to be an active area for further researches.