Depends on the type of pain. Pain associated with a toothache is different than pain in the jaw due to a ligament injury. They two are most likely not connected.
That could be part of the reason but probably not the reason for the indication of periodontal ligament injury. You should go to the periodontist and get a professional opinion.
Basically it depends on what types of the pain. Probably periodental ligament injury is the cause of pain. You should go to the periodontist and professional opinion.
Yes ,peridontal ligament injury causes pain in the jaws with toothache. The gums and bone surrounding the tooth structure when infected leads to root infection thereby causing pain.