Is it true the replacement of implants is fairly minor?
For removal and replacement of smooth, saline breast implants, yes. The major part of the original operation is the creation of the pocket. When the replacement is needed, the pocket is still there, so all that is needed is to open the pocket, take the old implant out and put in a new one. If it is a silicone filled implant, the removal of silicone from an older generation implant can take quite a while if it has poured out into the pocket.