Characteristic sign of MPDS——LASKIN’S 4 CARDINAL SIGNS
Unilateral pain
Muscle tenderness
Clicking and popping noise in TMJ
Limitation of jaw function or deviation of jaw
Laskin also emphasized that other than the above positive signs,,the following signs must be absent::
There should be absence of clinical,radiographic or biochemical evidence of organic changes in TMJ
There should be no tenderness on palpation via external auditory meatus
Other signs and symptoms include::
Restricted opening and jaw deviation
Masticatory pain due to myalgia,arthralgia
Difficulty in chewing and functional movements
Popping and clicking sounds
Soreness of muscle when palpated.Myofacial trigger zones are stimulated by pressure and produces referred pain
Acute malocclusion due to mandibular displacement