1. 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.
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2. 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
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3. Salivary Glands Submandibular Anterior relation: Posterior relation:
Anterior belly of digastric muscle
Posterior relation:
Stylohyoid, posterior belly of digastric, stylomandibular and parotid gland
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4. Salivary Glands Submandibular Medial relation: Lateral relation:
Mylohoid, hypoglossal, mylohyoid nerve and vessels, lingual and hypoglossal nerves
Lateral relation:
Skin, platysma, deep cervical fascia, lymph node and medial surface of mandible. Cervical branch of facial nerve
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5. Salivary Glands The deep part: Submandibular Anterior:
Extend forward between the mylohyoid below & laterally and the hyoglossus and styloglossus medially
Anterior:
The lingual salivary gland
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6. Salivary Glands Submandibular Posterior: Lateral: Superiorly Inferior:
Stylohyoid, digastric, ligament and parotid
Lateral:
Mylohyoid muscle
Superiorly
Lingual nerve and submandibular ganglion
Inferior:
The hypoglossal nerve
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7. Salivary Glands Submandibular duct: Blood supply Nerve 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 and the genioglossus muscle
Open into the mouth on a small papilla situated at the side of the lingual frenum
Blood supply
Facial & lingual arteries and veins
Nerve supply:
Secretomor fibres from the superior salivary nucleus of the VII nerve via the chorda tympani and the lingual nerve
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8. Salivary Glands: Sublingual salivary gland: Sublingual
Is the smallest, almond-shaped and lie beneath the mucous membrane of the floor of the mouth close to the midline
It in mucous-secreting gland
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9. Salivary Glands: Relation: Sublingual Anterior: Medial: Lateral:
gland of the opposite side
Medial:
genioglossus, lingual nerve & submandibular duct
Lateral:
medial surface of the mandible
Superior:
mucous membrane
Inferior:
the mylohyoid muscle
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10. Salivary Glands: Sublingual duct: Blood supply Nerve supply Sublingual
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
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11. 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.
Mainly due to pyogenic infection (Acute sailadenitis) or viral (Mumps).
Mixed tumour
Malignant ones causes facial palsy.
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12. Salivary Glands Submandibular gland:
Sailolethesis, stones, are the commonest cause of recurrent painful swelling
Pleomorphic adenoma
Removed as part of the block dissection of the neck because of the lymph nodes.
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13. Salivary Glands Sublingual: Minor salivary gland:
Mucus retention cyst, Ranula.
Minor salivary gland:
Mucus retention or extravasation cyst, on the lip and cheek
Mixed tumours mainly in the palate.
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