I'm a 21 year old female, I've had problems with my teeth for a while now. Almost all of my front top teeth have fillings due to my gum line cavities. I've even had a root canal due to it. But even after all of this, I STILL get the gum line cavities. On the tooth I got the root canal on, the decay still happened. Some of the cavities I've had for a while and they are only getting worse. I also have one tooth that started out as a gum line cavity and has broken off and now is only half of a tooth, the front half is gone and only the back half remains. I'm way too young to be having problems like this and the dentist I had couldn't really tell me what exactly was causing this. Does anybody have an idea about what could be causing this or how I can prevent it from keep happening? Please help!!!!! Thank you!