9 1\TEMPORARY LIMITATION OF MOVEMENT (TRISMUS) CAUSES:1\infection and inflammation of the joint2\injuries and fractures of the condoyler neck3\tetanus4\TMJ pain dysfunction syndrome5\dislocationTREATMENT:In all conditions the treatment is to relieve the underlying cause
10 TMJ dislocationThe joint become fixed in the open position by anterior dislocation.CAUSES:1-forcible opening of the mouth by a blow on the jaw2-during dental extractions under general anesthesia3-occasionaly a patient will dislocate spontaneously whilst yawning
11 MANAGEMENT:Manual reduction by pressing downwards and backwards on the lower posterior teeth
12 PERSISTANT LIMITATION OF MOVEMENT KNOWN AS ANKYLOSISCAUSES:1\developmental abnormalities in the growth of the coronoid process2\malignant tumors of TMJ bone3\ fibrosis of the joint or the attached muscles as result of trauma or irradiation4\certain diseases like oral submucous fibrosis and scleroderma5\forceps delivery at birth
13 MANAGEMENT: 1\establish joint movement by removal of the underlying cause 2\prevent relapse 3\excercise of the joint
15 Myofacial pain-dysfunction syndrome IT IS A CHRONIC PAIN DISORDERAETIOLOGY:in most cases it is caused by muscle spasm(involuntary muscle contraction)There is an association with stress and bruxism (grinding of the teeth) and many patients have a night-time tooth grinding habit
16 CLINICAL FEATURES:1\Pain associated with the joint or the attached muscles.2\Limitation of opening (trismus) or deviation of the jaw on opening.3\Clicking of the joint .4\ It may be associated with a headache and misdiagnosed as migraine5\The pain is often worse in the morning
17 MANAGEMENT:1\ explanation of the condition and reassurance.2\A soft diet and jaw rest3\ in severe cases analgesics and anti-inflammatorydrugs may be prescribed.