Which arteries supply the temporalis myofascial flap used for closure of oro-nasal communication?

• A. Maxillary and superficial temporal arteries
• B. Anterior and posterior deep temporal arteries
• C. Facial and lingual arteries
• D. Occipital and external carotid arteries

Answer: (B)

The temporalis myofascial flap is an important surgical technique used for closure of oro-nasal communications, and its vascular supply primarily comes from specific branches of the maxillary artery. The anterior and posterior deep temporal arteries, which are branches of the maxillary artery, provide the essential blood supply to the temporalis muscle and thus to the temporalis myofascial flap.

These deep temporal arteries penetrate through the deep layers of the temporalis muscle, ensuring adequate perfusion necessary for maintaining tissue viability after the flap is elevated. The effective blood flow from these arteries is crucial for the flap's success in reconstructive procedures, particularly for the closure of defects between the oral cavity and nasal cavity.

Other arteries, while they play significant roles elsewhere, do not specifically provide sufficient blood supply to the temporalis myofascial flap, which is critical for its function and healing. This understanding helps reinforce the anatomical knowledge needed to properly utilize this flap in surgical applications.