Make your teeth Healthy

and Make it Glitter

The university of Georgia

Sbj.Surgical Dentistry III

Doctor Tamuna Nemsadze

Atheer ahmed 1330129

Anatomy of salivary gland and function

Salivary gland any of various glands that discharge a fluid secretion and especially saliva into the mouth

cavity . Major and minor Salivary Glands

Major (Paired) Parotid Submandibular Sublingual

MinorThose in the Tongue, Palatine Tonsil, Palate, Lips and Cheeks

Myoepithelial cells- star shaped, contractile, lie between the secretory cells and the basement membrane.

The acinar cells of the salivary glands are classified as:Serous cells- thin, watery secretion rich in enzymes

e.g. Parotid gland.Mucous cells- thick, viscous secretion for protection

and lubrication. e.g. Sublingual salivary gland.Mixed cells (seromucous)- both watery and viscous

material . e.g. Submandibular salivary gland.The acini of the minor salivary glands produce mixed

(serous and mucous).

parotid glands

the largest salivary glands. Located superficially. Lies just below the zygomatic arch infront and below the ear . lie superficial to the posterior aspect of the masseter muscles

and the ascending rami of the mandible. the seventh cranial (facial) nerve roughly divide the parotid gland

into a: superficial lobe deep lobe

the major duct of the parotid gland is Stensen duct is about 1 to 3 mm in diameter and 6 cm in length and opens into oral vestibule opposite 2nd upper molar .

Submandibular gland

located in the submandibular triangle of the neck, which is formed: the anterior belly of the digastric muscle. the posterior belly of the digastric muscle. the inferior border of the mandible.

Extends posteriorly from below 1st molar to angle of mandible. the major duct of the submandibular gland is Wharton duct which is

passes forward along the superior surface of the mylohyoid muscle in the sublingual space, adjacent to the lingual nerve .

Wharton duct is about 5 cm in length, and the diameter of the duct lumen is 2 to 4 mm.

Sublingual gland

The sublingual glands are located on the superior surface of the mylohyoid muscle, in the sublingual space, and are separated from the oral cavity by a thin layer of oral mucosa in the floor of the mouth.

The main acinar ducts throughout the sublingual glands are called Bartholin ducts and In most instance coalesce to form 8 to 20 rivinus ducts.

Function of salivary gland Moistens oral mucosa Moistens & cool food Medium for dissolved food Mineralization Buffer (HCO3) Protective Pellicle Digestion (Amylase, Lipase) Antibacterial (Lysozyme, Peroxidase,) Aids in swallowing Aids in speech Keeps the mouth and teeth clean

Salivary glands produce 1000 _ 1500 L per day. Daily Saliva Production by Salivary Gland.

Submandibular gland 70% Parotid gland 25% Sublingual gland 3%–4% Minor glands small amount of saliva

the daily production of saliva begins to decrease gradually after the age of 20 years because of increased intraparenchymal fibrosis as well as decreased neural secretory stimulation.

Parotid gland is more active then submandibular gland except the calcium is more secretion in submandibular gland then parotid gland.

Thank you for your attention

References

From our book Contemporary Oral and Maxillofacial Surgery 6th 2014 From Wikipedia Oral anatomy & histology – K . Avery Internet