(4.2) Temporal Region & Temporomandicular Joint Flashcards
Name three arteries in the infratemporal region.
- Maxillary
- Middle Meningeal
- Superficial Temporal
Name three venous structures in the infratemporal region.
- Maxillary
- Middle Meningeal
- Pterygoid Venous Plexus
Name the 7 nerve structures in the infratemporal region.
- Mandibular Nerve (CN Viii)
- Auriculotemporal
- Lingual
- Buccal
- Inferior Alveolar
- Chorda Tympani
- Otic Ganglion
Name three muscles in the infratemporal region.
- inferior part of Temporalis
- inferior part of Lateral Pterygoid
- inferior part of Medial Pterygoid
Name two openings in the infratemporal region. What structures travel through them?
- Foramen Ovale: Mandibular Nerve
- Foramen Spinosum: Middle Meningeal Artery
Which nerve and where is anaesthetic during dental procedure? What structures does it anaesthetise?
- Inferior Alveolar Nerve
- Mandibular Foramen
- Mandibular teeth on medial side
- Skin & Mucosal membrane of lower lip, gingavae & jaw
What bony structures articulate at Temporomandibular joint?
- Condylar Head of Mandible
- Mandibular Fossa of Temporal
What ligaments stabilise Temporomandibular joint? Which is the strongest?
- Temporomandibular Ligament (extracapsular) - strongest
- Sphenomandibular & Stylomandibular (intracapsular)
What type of joint is Temporomandibular joint? What movements does it allow?
- Modified Hinge type (lined by Fibrocartilage instead of Hyaline)
- Gliding: Protrusion & Retraction
- Rotation: if Pivoting on the right & Retracted on the left -> Rotates to the right
- Extension: opening the mouth
- Flexion: closing the mouth
What movements and muscles are involved in opening the mouth?
Opening = Extension = Depression & Protrusion of Mandible
- Largely by gravity
- If against resistance: Lateral Petrygoid
What movements and muscles are involved in closing the mouth?
Closing = Flexion = Elevation & Retraction of Mandible
- Initially: Retraction of mandible by inferior fibres of Temporalis
- then: Elevation of Mandible by rest of Temporalis & Masseter & Medial Petrygoid
What provides stability of the Temporomandibular joint?
- Extracapsular ligament: Temporomandibular
- Occlusion of teeth
How and what normally cause the Temporomandibular Joint dislocated?
- Anterior Dislocation of Mandible
- Big bite or yawing
- Excessive contraction of Lateral Petrygoid + the others all resting
What is it called if you grind your teeth while asleep?
Bruxism
What is Temporomandibular Pain Dysfunction Disorder?
Muscle pain -> reduced joint movement
