... apparently the only work that the FDA will currently allow US plastic surgeons to perform on string implants (and that apparently means ANY US plastic surgeon, even the inventor of string implants) is to REMOVE THEM - to be replaced by conventional implants which do have FDA approval. I have nothing but admiration for Dr. Johnson - he's undoubtedly the best all round plastic surgeon I have ever met. If you'll check the timing of your friend's perceived change in Dr. Johnson's outlook and the FDA ruling in regard to his string implants (declaring that as breast implants PPP string implants are not covered under the general approval of PPP for use as suture material in the human body, and must undergo the same approval procedure as any other type of breast implant) you'll find that they coincide! If I'm not mistaken, this same FDA ruling in regard to breast implants was also responsible for ending the further use of implants made by the French company PolyImplantProstheses, which were previously allowed in the USA under a similar (but much larger) clinical trial.
Whether or not you or I or anybody else agrees with the wisdom of the FDA ruling is irrelevant. For a fact the FDA has the authority to totally control the permissible activities of Doctors, Hospitals, Clinics, Medical Device manufacturers etc. For years the FDA banned the use of silicone implants in the USA even though it was eventually proven that the alleged silicone implant health risks were non-existant. About 2 years ago the FDA reversed their silicone ban, based on an extremely expensive study funded by the US implant manufacturers and others, and aided by leading medical colleges and institutions. String implants have not received any such support or financial backing, and very probably never will.
At the moment, to the best of my knowledge, the only implants FDA approved for general use by any US plastic surgeon are those implants listed in the catalog of US Implant manufacturers Mentor and McGhan Medical. The FDA has also approved a clinical trial of implants manufactured by the US division of Silimed, although these are only available to a limited number of patients through a limited number of plastic surgeons who are participating in the trial.
About string implant maintenance for myself or any other girl who currently has string implants, all I can tell you is that I received the same alternative as your friend did, to have my string implants replaced with conventional ones. So, like your friend, I'm just hanging in there and hoping no complications develop with my own string implants because I also love them! I guess I'll just have to deal with the fact that my breasts will likely continue to keep accumulating fluid and keep growing!