ive had certain problems with my upper front left tooth, its gray/blue color at the top. the tooth has had many problems for a few years. i chipped it when i was younger and a few years later a pus bubble formed, ive had certain root canals, then when those failed i had a certain procedure where he did some thing at the tip of the root canal to try and save it. after about a year the puss came back, the tooth started to become just a bit discolored not to noticeable, but i just want to save this tooth or do something about it! can someone please explain what is happeneing to me and my tooth and what options i have! i really want to keep the tooth but idk anything to just make my smile great again, please and thank you.