The fluid silicone prosthesis.

Abstract

Injected fluid silicone serves as a soft prosthetic device and is an effective alternative to surgery in the management of corns and calluses. The material can relieve pain in weightbearing scars, reduce the incidence of recurring neuropathic ulcers, and protect skin at points of bony pressure. Augmenting subcutaneous tissue reduces both the vertical forces that cause direct pressure and the shear stresses imposed on plantar skin during horizontal acceleration or deceleration. The only significant side effect has been fluid migration, which is asymptomatic upon weightbearing and is seen only rarely when small amounts are implanted. Histologic examination of long-term biopsy and necropsy specimens has revealed no adverse tissue response. The safety and efficacy of injectable silicone as a soft-tissue implant in the foot have not been confirmed by the Food and Drug Administration, and pending completion of authorized investigation, the material is not available. Successfully completed studies, federal approval, and proper use could provide relief for millions of people who suffer from these common foot disorders.