I have several teeth on the bottom that are turning black at the gum line, what is causing this and what can I do to fix it?  I am only 44 years old and I am afraid I either need several root canals or they will tell me to put dentures in but Im only 44.  I brush my teeth twice a day and use mouth wash also.
Helloo...the black line if present on tooth surface it can be either due to staining or it can be caries...if caries u can get it filled based on depth if it's staining it can be removed by scaling...if black color is in gum.then it can be due to sublingual calculus which can be removed by scaling...so nothing to be worried meet a dentist and get your problem solved...according to symptoms said by u i don't feel u have chances of denture now.....be cool.hope your benefitted something by this reply.have a healthy day!!!