Unfortunately, as time goes on it is often difficult for patients to remember the specifics of the type of breast augmentation surgery and implants that they had. Your are not alone! The easiest way to determine what type of implant you had is to request a copy of the operative report from either the hospital, surgery center or your surgeon's office. The implant specifics are recorded on this document. Your office record also includes this information. If it has been over ten years since your procedure, sometimes these records are no longer available. Ultrasound or MRI can help to answer this question but it is an expensive way to solve the mystery and not an indication for these procedures. If you registered your implants with the manufacturer at the time of surgery, the company will have a record of this information. Fortunately, this inforation is not absoltely critical to your health unless you are having a problem with your implants. Your surgeon can often develop a reasonable treatment plan even without this information. I would strongly recommend that you register your implants and purchase the affordable insurance program if you have surgery again. These programs are helpful in storing vital information regarding your implant type, size, filler, model and lot number. Should there be a recall or long term problem requiring additional surgery, this information is readily available. There is often also some fiancial support to offset costs. Investigate the options available by contacting your surgeon or the implant manufacturer's websites.