Hey, I'm not sure about it being part of Lupus, but check with your Pharmacist and see if any of the meds you are on could be canceling out the calcium in your food or vitamins.
Sometimes certain meds can do that to calcium, Which you need for your teeth and bones. If you have any bone issues Like bad disks in your back or other issues, then those issues will include your teeth so they might need to put you on a supplement. This maybe useless info, but I hope it helps. :roll: :lol: :lol: :lol: