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Causes of trismus

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CAUSES OF TRISMUS FOR GENERAL DENTAL PRACTICE

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Causes of trismus

  1. 1. DEPARTMENT OF ORAL MEDCINE AND RADIOLOGY AJINS T A CRI
  2. 2. Truisms is called – LOCK JAW Spasms of the muscles of mastication resulting in the inability to open the oral cavity ; often symptomatic of pericoronitis. Normal mouth opening males – 35-45mm. Normal mouth opening females- 40-60mm.
  3. 3.  Most common: -Impacted third molar. -Removal of wisdom teeth. - Removal of tonsil. Less common: - Radiation therapy to the face and neck. - Tetanus. - Myositis. - Jaw nerve damage. - Adhesion or scaring of the tissues around the jaw or tongue. - Muscle atrophy. - Poor oral hygiene.
  4. 4. - tumors or cancer. - Trauma to the jaw area. - Diseases such as lupus and scleroderma. TRISMUS can occur most commonly in the first 9 months after radiation near the temporomandibular joint.
  5. 5.  Intra articular 1. Ankylosis 2. Arthritis synovitis. 3. Meniscus pathology. Extra articular:  INFECTION: • Odontogenic 1. Pulpal 2. Periodontal 3. Pericoronal • Non odontogenic 1. Tonsillitis 2. Tetanus 3. Meningitis 4. Brain abscess 5. Parotid abscess  Trauma 1. Fractured mandible 2. Fracture zygomatic arch 3. Incorporation of foregion bodies.
  6. 6.  Dental treatment related • Post extraction • Local anesthetic injection.  TMD • Trauma to the TMJ due to wide and prolonged opening . • Myofacial muscle spasm. • Internal derangement.  Tumors and oral care 1. primary and secondary tumors of epipharyngeal and parotid region, jaws joint. 2. Submucous fibrosis 3. Myositis ossificans  Drugs 1. Phenothiazine 2. Succinyl choline 3. Tricyclic antidepresent. 4. Metaclopramide 5. Halothane.
  7. 7.  Radiotherapy and chemotherapy 1. Osteoradionecrosis 2. Post radiation fibrosis  Congenital 1. Hypertrophy of coronoid 2. Trismus-pseudo-camptodactyly syndrome.  Miscellaneous 1. Hysteria 2. Lupus erythematous.
  8. 8.  Heat therapy  Analgesics  A soft diet, and ( if necessary)  Muscle relaxants.
  9. 9. THANKYOU

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