My regular dentist told me that a periodontal specialist would not actually deal with issues with the periodontal ligament. This makes no sense to me, and I have not tried to contact one yet, but if not, then who specializes in bruised or mystery symptoms with possibly the periodontal ligament.? I had to have a root canal on a tooth, two sessions,even since before the root canal I still have biting pressure and just touching pain. I haven’t eaten on that side since August. I went yesterday for the first part of a crown because the dentist said that possibly a new crown could stop this issue. Both dentist and the endodontist said the root canal looks beautiful and no one sees a crack anywhere my dentist yesterday put some dye on the tooth and said he does not see a deep crack there was a hairline crack that went away when he put pressure on it. something like that I really couldn’t understand but this is driving me crazy because 10 years ago I also had a root canal that wound up with biting pressure that wouldn’t go away and I had to have it pulled. What is wrong with my mouth? I am so nervous about this and I don’t know where to turn.