The central region of the TMJ articular disc consists of_____________?
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Answer: C. Avascular & deviod of nervous tissue
Explanation
The central zone of the TMJ articular disc lacks blood vessels. It is also completely devoid of any nerve fiber endings. This avascular and aneural design withstands heavy compressive masticatory forces. The temporomandibular joint is a specialized sliding hinge articulation. The articular disc is composed of dense fibrous connective tissue. Peripheral zones of the disc do contain limited innervation and blood supply.
Central disc perforation causes pain because underlying tissues become irritated. Imaging techniques help diagnose internal derangements of the articular disc. Surgical interventions must respect the avascular nature of the central disc. Avascular alone ignores the absence of nervous tissue in the central zone. Devoid of nervous tissue alone ignores the lack of blood vessels. None of the above is incorrect because the central zone is indeed avascular and aneural.
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