3 major symptoms of TMJ disorder
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Pain
The most common site of pain is the TMJ area, followed by the masseter, the temporalis area, and the sternocleidomastoid, in that order. TMJ disorder may also cause symptoms such as migraine, neck and shoulder stiffness.
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Joint noise
It is classified into a simple joint sound expressed as a 'click' or 'clack' from the jaw, and crepitus expressed as sounds such as 'creaking' or 'grating'.
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Limited mouth opening
When opening the mouth to the maximum, about 45-55mm for men and 40-45mm for women is the normal opening range. When the mouth is opened comfortably, an opening of 40mm or less is judged as limited mouth opening.