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DEH 123: Head & Neck Anatomy

Chapter 5: Temporomandibular Joint

Chapter 5: Temporomandibular Joint

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Kelsie Orndorff
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Kelsie Orndorff
This flashcard set is designed for university-level medical students focusing on head and neck anatomy, particularly the temporomandibular joint (TMJ). It covers key structures like ligaments, the joint disc, and the temporal bone, as well as common issues such as TMD symptoms, joint movements, and associated pain. Students and professionals in dental or medical fields will find this set valuable for understanding the complexities of the TMJ and its clinical relevance.
Karten
10
Lernende
1
Sprache
Englisch
Kategorie
Medizin
Stufe
Universität
Erstellt / Aktualisiert
04.01.2014 / 29.01.2018
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Lernkarten

What are the 3 portions of the temproal bone and which portion makes up the TMJ?

  • Squamous portion
  • Petrous portion
  • Tympanic portion: makes up the TMJ

Where does the temporal bone articualte with the mandible? Where does the mandible articulate with the temporal bone?

  • Articular eminence and the articular fossa
  • Head of the condyle

This completely encloses the TMJ.

Joint capsule

This is located between the articular eminence and the condyle.

Joint disc

These are formed by the joint and contain synovial fluid.

Synovial cavities (2)

What are the 3 ligaments associated with the TMJ?

  • TMJ ligament: reinforces the joint capsule and prevents retraction (on lateral side)
  • Sphenomandibular ligament: vestige of Meckel's cartilage. it become taught when jaw is protruded. It is a landmark for local anesthesia
  • Sthylomandibular ligament: formed from cervical fascia.

What are teh 2 movements of the TMJ?

  • Gliding: occurs between the disc and the articular eminence of the temporal in the upper synocial cavity to produce protrusion and retraction
  • Rotation: occurs between the disc and the condlye in the lower synovial cavity accomplishing depression and elevation of the jaw.

What movements are accompanied with opening and closing the mouth?

  • Opening: protrusion & depression
  • Closing: retraction & elevation

This is when the head of the condlye moves too far anterior on the articular eminence. It can involve either one or both sides. Occurs when opning too wide (i.e. prolonged dental work).

Sublaxation

What are symptoms of TMD?

  • Headaches not helped by migraine medication, especaially on rising or late in the afternoon
  • Facial pain
  • Ear pain or stuffiness in the absence of infection
  • Pain and/or  sounds in the TMJ
  • Pain in the jaws, espeically when chewing or upon arising
  • Limited and/or painful jaw opening or deviation to one side when opening
  • A feeling that your bite is "off"
  • Persistent neck pain, especially at the base of the skull, following a motor vehivle or sports accident
  • Generlized tooth sensitivity, especially when chewing

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