Dentistry Book

Jaw Disorders

Tooth Disorders

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TrismusAka: Lockjaw

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  1. Definition
    1. Spasm of the masticatory muscles resulting in jaw forcefully held closed
  2. Causes: Localized muscle spasm
    1. Trigeminal Neuralgia
    2. Dermatomyositis involving the face
    3. Temporomandibular Joint Osteoarthritis
    4. Impacted third molar
  3. Causes: Generalized muscle spasm
    1. Infection
      1. Tetanus
      2. Trichinosis
      3. Typhoid Fever
      4. Rabies
      5. Cholera
      6. Sepsis
      7. Encephalitis
    2. Miscellaneous
      1. Tetany
      2. Seizure disorder
      3. Psychiatric causes

Trismus (C0041105)

Definition (MSH)Spasmodic contraction of the masseter muscle resulting in forceful jaw closure. This may be seen with a variety of diseases, including TETANUS, as a complication of radiation therapy, trauma, or in association with neoplastic conditions.
ConceptsDisease or Syndrome (T047)
EnglishTrismus
Spanishtrismo, trismus
Parent ConceptsBrain Diseases (C0006111), Movement Disorders (C0026650), Spasm (C0037763), Motor dysfunction (C0234131), Duplicate concept (C1274013)
SourcesCST, DXP, LCH, MSH, MTH, NDFRT, OMIM, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)


Lockjaw (C0343495)

ConceptsFinding (T033)
EnglishLock Jaw, Lockjaw, Tetanus with trismus
Spanishtetanos con trismo, tetanos con trismus, trismo
Parent ConceptsTetanus (C0039614)
SourcesAOD, DXP, MSH, MTH, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)



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