"Polyurethane Implants" have been in use for many years here in Dominican Republic under the brand name of SIlimed from Brasil (the manufacturer of the SIENTRA implants approved by the FDA). I have a lot of experience with them.I use them in very specific cases where the implant needs to be placed over the pectoral muscle.If the case allows I prefer the Sientra Cohesive Gel Silicone under the muscle, but if needed I use the Polyurethane ones.
Thank you for the question.Although these implants might not be available in California, many of these brands are available in different parts of the world. Dr. Campos