sound like tmj. ask your dentist.
Nope he said nothing that resembles TMJ,he described an
underbite.
TMJ is Pain or tenderness of your jaw,Aching pain in and around your ear,Difficulty chewing or discomfort while chewing,Aching facial pain,Locking of the joint, making it difficult to open or close your mouth,Headache,Uncomfortable bite,An uneven bite, because one or more teeth are making premature contact
TMJ disorders can also cause a clicking sound or grating sensation when you open your mouth or chew.
But if there's no pain or limitation of movement associated with your jaw clicking, you probably don't have a TMJ disorder.
Underbite refers to an abnormal protrusion
(jutting out) of the lower jaw, leading to a malocclusion, or bad bite. To get an idea of what an underbite looks and feels like, stand in front of a mirror stick out your chin and bottom teeth so they are positioned in front of your upper teeth.
Although Whiteknucks an underbite can lead to TMJ if untreated so you were on the right track just ahead of where he is at the moment.