Patients who undergo nose surgery with synthetic implants may increase the risk of infection requiring additional medical procedures, a study found. About 20 percent of the patients who used implants such as Stryker Corp. (SYK)’s Medpor developed infections, while 5.3 percent who used products like W. L. Gore & Associate’s Gore-Tex got infections, according to research released today by the Archives of Facial Plastic Surgery.