I learnt a lot when reading the excellent book about tooth whitening techniques by Linda Greenwall (more info here: http://www.drchrisharper.co.uk/blog/book-review-tooth-whitening-techniques). One particular section that caught my attention was regarding the effect of whitening materials, like carbemide peroxide, on the structure of the tooth and common dental materials. Generally the evidence seems to suggest that there is no clear negative effect caused by whitening except for possibly in relation to amalgam. I know that material science is always improving but it was my understanding from what we were taught that once the amalgam was set it didn’t release mercury. So it is very interesting to hear that in some circumstances that isn’t true. Is the amount significant? That is hard to tell. Clearly needs more investigation.
Dr Chris Harper