Share '3 cavities since going raw!!!!! What's going on?'

In less then a year I have had 3 cavities. Any ideas as to why this is happening. I take very good care of me teeth....I floss and brush several times a day. It's disheartening to be eating the 'best food' yet have my teeth deteriorating. I love raw food and feel wonderful eating this way but am concerned that it is not the best thing for my body. Any thoughts?