SUbmandibular gland

Submandibular salivary gland position: It lies in the digastric triangle overlapping its boundaries. Shape: The gland is formed by large superficial part and smaller deep part.

Superficial (inferolateral) surface: Surfaces & relations: (3) Superficial (inferolateral) surface: skin., superficial fascia containing platysma muscle. Deep fascia. Facial vein and cervical branch of facial nerve. Submandibular lymph nodes

Lateral surface; Submandibular fossa of mandible. insertion of medial pterygoid. facial artery.

Medial surface: Mylohyoid muscle (ant.). Hyoglossus (post.) separated from it by a group of important structures called lateral relations of Hyoglossus muscle.

Lateral relations of hyoglossus muscle: From above downwards: Styloglossus muscle. 2. Lingual nerve. 3. Submandibular ganglion. 4.Deep part of submandibular gland. 5. Hypoglossal nerve. 6. Suprahyoid artery.

Submandibular duct: It is about 2 inches long. It arises from the medial surface of the superficial part of the gland.

It opens in the floor of moth on the summit of sublingual papillae.

Blood supply: Arterial: Facial and lingual arteries. Venous: Facial and lingual veins. Lymph drainage: Submandibular lymph nodes. Deep cervical lymph nodes

Nerve supply: Sensory: Lingual nerve. Sympathetic: Plexus around facial artery. Parasympathetic: Preganglionic fibres: Chorda tympani (VII) Ganglion: Submandibular ganglion Postganglionic fibres: Lingual

Sublingual salivary gland It is the smallest of the three salivary glands. Position: It lies beneath the mucosa of the floor of the mouth, lodged in the sublingual fossa of the mandible. It comes close to its fellow behind the symphesis menti.

Sublingual ducts: 8- 20 ducts arise from the gland and open on the summit of the sublingual fold. Some ducts of the anterior part of the gland collect into major sublingual duct that open close or with the submandibular duct.

Arterial supply: Sublingual branch of lingual artery. Twigs from Submental artery. Venous drainage: Lingual and facial veins. Lymph drainage: Submental and submandibular lymph nodes into deep cervical lymph nodes.

Nerve supply: Sensory: Lingual nerve. Sympathetic: Plexus around lingual and facial arteries. Parasympathetic: Preganglionic fibres: Chorda tympani (VII) Ganglion: Submandibular ganglion Postganglionic fibres: Lingual

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