Dental experts! what is up with my jaw, it won't open all the way?

Tmj problem: Your tempromandibuar joint may have a problem, or the muscles that hold your lower jaw to your skul, and there are a few may be the problem, best is to see a dentist or oral surgeon.

Locked jaw?: This sounds like a problem with your TMJ and/or the surrounding muscles and ligaments. This is common in people who chronically grind and/or clench their teeth (bruxism), but can also be the result of an injury, an infection, or impacted wisdom teeth. See your dentist or an oral surgeon for an examination and evaluation.

Closed lock: Sounds like the disc in your jaw joint is out of position. As malocclusion often cause of, or contributes to, TMJ syndrome ask your dentist if consultation w orthodontist would be advisable.