The question of whether or not you should take antibiotics for dental procedures if you have breast implants is a very interesting question. In short, I would probably say yes. There is some evidence that this can be of benefit to some women. When you have a dental procedure like teeth cleaning, bacteria can enter your blood stream for a brief period of time. Generally you are never aware of this, nor does it create a problem. However, if you have breast implants, it is possible for some of the bacteria to come to rest in the capsular tissue around the breast implants. This will not cause an overt infection, but can create what might be considered a sub-clinical infection which can cause an increase in the thickness of the capsule creating a capsular contracture and firmness of the breast. As you alluded to in your question, a similar thing could happen with a prosthetic heart valve.Clearly this does not happen to everyone, but there is no way to know who will be affected by this. All of us who do a lot of breast enlargements have had the experience of seeing someone several years out from a breast augmentation who all of the sudden has firmness in one of her breasts. Frequently this has been preceded by an event like teeth cleaning, or some other infection like a urinary tract infection.My recommendation to women with breast implants is that they consider a dose of antibiotics two hours prior to such a procedure, and another does 8 and 16 hours afterwards. It is pretty low cost, with very little down side. So, yes, this is something I would think about doing.All the best,David B. Reath, MD