In the title you made a typo and said 1 year
I hope all of them last longer than that
I just had silicon gel implants put in last Monday (June 26th) and I had that same thought, that they would have to be replaced every 10 years, and I didn't really like that idea considering I am only 31, that would mean quite a few surgerys for me. When I discussed this with my doctor she told me that as long as there is not a problem with the implant or anything then you can wear the same ones for as long as you like. She says she has a lady that has had the same implants in for 25 years now and still has no issues. I hope this helps.
Aren't there any safety risks with the material breaking down after that long? I don't think I've ever heard a doctor say 25 years is alright!