Questions and Answers
Which nerve branches provide sensory innervation to the temporomandibular joint?
What is the primary arterial supply to the temporomandibular joint?
Which statement accurately describes centric relation (CR)?
What is the interocclusal space when the mandible is in the rest position?
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Which description fits the term centric occlusion (CO)?
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Study Notes
Innervation and Vascularization of TMJ
- Sensory innervation of the temporomandibular joint arises from the auriculotemporal and masseteric branches of the mandibular division of the trigeminal nerve.
- Blood supply to the TMJ is primarily from branches of the external carotid artery, with the superficial temporal branch being the most significant.
Mandibular Position
- Centric Occlusion (CO) / Intercuspal Position (ICP): Defined as the maximum intercuspation when the teeth are in complete contact.
- Centric Relation (CR): Refers to the mandibular position at rest, where the condyles are maximally anterior and superior in the glenoid fossae; this position is achieved without condylar translation.
- In the rest position of the mandible, with the head upright, there exists an interocclusal space of approximately 1-3 mm at the incisors.
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Description
This quiz covers the sensory innervation and vascularization of the temporomandibular joint (TMJ), including key nerves and blood supply. Additionally, it explores basic jaw positions such as centric occlusion and intercuspal position. Test your knowledge on TMJ anatomy and functions.
