First question, you say you don't let her go to sleep with a bottle, but is she still drinking out of one? If so, that's the issue right there. The sugars from formula, milk, breast milk, etc.sit on the teeth when they are being ingested via a bottle, and cause decay. Are you nursing? If so, that could be the issue also, for the same reason. I was once a dental assistant and am familiar with a lot of dental recommendations, and all of the dentists I've ever worked with have advised mothers not to breastfeed past the one year mark, for this reason. Also, if she is still drinking out of a bottle, putting anything in it other than water at this age is just a no-no. More likely than not though, it sounds like there might have been some trauma to the teeth, but when you say all of her teeth are like that, I have to wonder if it's something else. Whatever it is, she needs to go to her dentist right away. Did the dentist mention anything about this at her last visit? I think the dentist would be more than willing to advise you on this, but he or she should have brought it to your attention initially.
I mentioned trauma because of the color of the discoloration, and it reminded me of when my daughter was about 2. She bit a Lego with her front tooth, and when she did, her tooth broke in half and the bottom part of her tooth came flying out not far behind the Lego. Naturally, because of the trauma, and eventually necrosis, her tooth turned gray and had to be pulled. She walked around looking like a 5 year old with no front teeth for 3 or 4 years! Good luck to you, and make sure she gets in to see her dentist :)
Updated
First question, you say you don't let her go to sleep with a bottle, but is she still drinking out of one? If so, that's the issue right there. The sugars from formula, milk, breast milk, etc.sit on the teeth when they are being ingested via a bottle, and cause decay. Are you nursing? If so, that could be the issue also, for the same reason. I was once a dental assistant and am familiar with a lot of dental recommendations, and all of the dentists I've ever worked with have advised mothers not to breastfeed past the one year mark, for this reason. Also, if she is still drinking out of a bottle, putting anything in it other than water at this age is just a no-no. More likely than not though, it sounds like there might have been some trauma to the teeth, but when you say all of her teeth are like that, I have to wonder if it's something else. Whatever it is, she needs to go to her dentist right away. Did the dentist mention anything about this at her last visit? I think the dentist would be more than willing to advise you on this, but he or she should have brought it to your attention initially.
I mentioned trauma because of the color of the discoloration, and it reminded me of when my daughter was about 2. She bit a Lego with her front tooth, and when she did, her tooth broke in half and the bottom part of her tooth came flying out not far behind the Lego. Naturally, because of the trauma, and eventually necrosis, her tooth turned gray and had to be pulled. She walked around looking like a 5 year old with no front teeth for 3 or 4 years! Good luck to you, and make sure she gets in to see her dentist :)