When you had the root canal did you have the crown put on it? Usually after years if there is not a crown put on, the tooth will break off because that tooth is dead. (Thats why it's called a root canal) If it were what you call the tip sticking out, you would be in a lot of pain. You don't mention any pain. When the root canal is done that hole it makes (where the root use to be) is packed with some kind of material (which is what wards off infection from getting into the bottom of that hole) so that is more than likely what you are seeing. At some point the tooth will just break off at the gum line which will just show you don't have a tooth anymore. If that packing material should fall out, then you do want to find some way to be seen so you can find out what your options are at that point. But for it to be your root would be impossible if you had a root canal done.
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