Salivary Glands Submandibular Salivary gland Is a large
Salivary Glands • Submandibular Salivary gland: • Is a large salivary gland composed of a mixture of serous and mucous acini • It lies under cover of the body of the mandible, form a V-shaped concavity with the deep part around the posterior border of the mylohyoid muscle. 11/29/2020
Salivary Glands Submandibular • Made up of a large superficial and a small deep part which are continuous with each other around the posterior border of the mylohyoid muscle. • Superficial part lie in the digastric triangle and separated from the parotid by stylomandibular ligament 11/29/2020
Salivary Glands • Submandibular Anterior relation: • Anterior belly of digastric muscle • Posterior relation: • Stylohyoid, posterior belly of digastric, stylomandibular and parotid glan 11/29/2020
Salivary Glands • Medial relation: • • Submandibular Mylohoid, hypoglossal, mylohyoid nerve and vessels, lingual and hyp Lateral relation: • 11/29/2020 Skin, platysma, deep cervical fascia, lymph node and medial surface
Salivary Glands • Submandibular The deep part: • Extend forward between the mylohyoid below & laterally and the hy • Anterior: • The lingual salivary gland 11/29/2020
Salivary Glands Submandibular • Posterior: • Stylohyoid, digastric, ligament and parotid • Lateral: • Mylohyoid muscle • Superiorly • Lingual nerve and submandibular ganglion • Inferior: • The hypoglossal nerve 11/29/2020
Salivary Glands Submandibular • Submandibular duct: • • Blood supply • • Emerges from the anterior end of the deep part and pass forward under the mucous membrane Crossed laterally by the lingual nerve and lie between the sublingual gland the genioglossus muscle Open into the mouth on a small papilla situated at the side of the lingual frenum Facial & lingual arteries and veins Nerve supply: • 11/29/2020 Secretomor fibres from the superior salivary nucleus of the VII nerve via the chorda tympani and the lingual nerve
Salivary Glands: Sublingual • Sublingual salivary gland: • Is the smallest, almondshaped and lie beneath the mucous membrane of the floor of the mouth close to the midline • It in mucous-secreting gland 11/29/2020
Salivary Glands: • Relation: • Anterior: • gland of the opposite side • Medial: • genioglossus, lingual nerve & submandibular duct • Lateral: • medial surface of the mandible • Superior: • mucous membrane • Inferior: • 11/29/2020 the mylohyoid muscle Sublingual
Salivary Glands: Sublingual • Sublingual duct: • 8 to 20 in number open into the submandibular duct but few open directly into the sublingual fold • Blood supply • Lingual and submental arteries and veins • Nerve supply • Secretomotor fibres reach the submandibular ganglion from the superior salivary nucleus of the VII cranial nerve via the chorda tympani to the lingual nerve 11/29/2020
Salivary Glands • • Clinically: Parotid gland: • Swelling can not be moved anteroposteriorly only vertically because it is fixed by the ramus and the mastoid process. • Swelling of overlying structures, skin, lymph nodes could be moved both vertically and horizontally. • • • 11/29/2020 Mainly due to pyogenic infection (Acute sailadenitis) or viral (Mumps). Mixed tumour Malignant ones causes facial palsy.
Salivary Glands • Submandibular gland: • Sailolethesis, stones, are the commonest cause of recurrent painful swellin • Pleomorphic adenoma • Removed as part of the block dissection of the neck because of the lymph 11/29/2020
Salivary Glands • Sublingual: • Mucus retention cyst, Ranula. • Minor salivary gland: • Mucus retention or extravasation cyst, on the lip and cheek • Mixed tumours mainly in the palate. 11/29/2020
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