1 / 28

PAROTID GLAND

PAROTID GLAND. Dr Shivarama Bhat Curtsey: Slideshare. Salivary Glands : 3 paired – Parotid Submandibular Sublingual Scattered - Tongue Palate

evangelinea
Download Presentation

PAROTID GLAND

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PAROTID GLAND Dr Shivarama Bhat Curtsey: Slideshare

  2. Salivary Glands : 3 paired – Parotid Submandibular Sublingual Scattered - Tongue Palate Cheeks Lips Function : Chewing Swallowing Saliva (Digestion by Enzymes) Serous & Mucinous

  3. GUT TUBE Stomodeum Buccopharyngeal membrane Pre-Laryngeal (Cephalic part) Pharynx and Part of definitive Mouth cavity Skin ectoderm Fore-gut Post-Laryngeal (Caudal part) Ectodermal furrow Mid-gut Parotid gland 4th week of IUL Hind-gut Proctodeum Cloacal membrane

  4. The salivary glands arise as buds from The epithelial lining of the mouth; the parotid appears during the fourth week In the angle between the maxillary process and the mandibular arch Opening of parotid duct indicates position of angle of primitive mouth

  5. PAROTID SALIVARY GLAND

  6. Parotid region Ext. acoustic meatus Sternomastoid Ramus of mandible

  7. Parotid gland: Largest saliv. Gland Wt. 15 gms Serous secretion Capsule – True – condensation of fibrous stroma of gland False - investing deep fascia Superficial thick – adherent to gland Deep – thin – attached to styloid process forms – stylomandibular Lig. (separates parotid from submandibular sal. gland.

  8. Parotid region Ext. acoustic meatus Sternomastoid Ramus of mandible

  9. Parotid – 3 sided pyramid Medial border Antero-medial surface Postero-medial surface Superior surface (Base) Superficial surface Anterior border Posterior border Apex

  10. Presenting parts • 01. Apex • 02. Base • 03. Superficial (lateral) surface • 04. Antero-medial surface • 05. Postero-medial surface

  11. Apex • Overlaps post. Belly of digastric • appears in carotid triangle, related to • stylomandibular ligament • Structures passing thro’ • 01. Cervical branch of facial nerve • 02. Ant. division of retro-mandibular vein • 03. Formation of ext. jug. vein

  12. 2. Base Concave related to; Ext. acoustic meatus Post. Part of TM joint Structures passing thro’ 01. Temp. br. Of facial nerve 02. Sup. Temp. vessels 03. Auriculo-temp. nerve

  13. 3. Antero-medial surface Deeply grooved by ramus of mandible; Relations: 01. Post. Inf. Part of masseter 02. Post. Border of ramus of mandible 03. Med. Pterygoid muscle insertion 04. Outer lip – branches of facial nerve 05. Inner lip - Maxillary art. Medial to neck of mandible 05 03 05 01 02

  14. 3. Postero - medial surface • Extensive • Relations: • Mastoid process with Sternomastoid • Post. Belly of digastric • 02. Styloid process with muscles • 03. Transverse process of atlas and • Rectus capitis lateralis • 04. Deep to styloid – Int. carotid • - Int. Jug. Vein • in between • 9, 10, 11, 12 cr. nerves • 05. Facial nerve after emerging from • SM foramen pierces the gland • 06. Ext. carotid first lodges in groove then • pierces the gland

  15. 1. Anterior border From above downwards: 01. Zygomatic br. of facial nerve 02. Transverse facial vessels 03. Upper buccal br. of facial nerve 04. Acc. Parotid gland & duct if present 05. Parotid duct 06. Lower buccal br. of facial nerve 07. Marginal mandibular br. of facial nerve 2. Posterior border Rests on masseter 01. Post. Auricular br of facial nerve 02. Post. Auricular vessels

  16. Parotid duct (stensen’s duct) 5 cms long, starts at mid point of ant. Border Runs on masseter, opens opp. crown of upper 2nd Molar Sup: Upper buccal br. of facial, Transverse facial vessels. Inf: Lower buccal br. of facial Pierces:1.Buccal pad of fat, 2. Buccopharyngeal fascia 3. Buccinator

  17. Parotid duct Surface marking

  18. Processes of the parotid gland: 01. Facial process -Superficial to masseter along parotid duct 02. Acc. Parotid gland and duct if present 03. Pterygoid process – Bet’ mandibular ramus and ptrygoid muscle 04. Glenoid process - Bet. Ext meatus and capsule of TM joint 05. Pre and post styloid processes in front related to int. carotid behind related to int. Jug. Vein

  19. Structures passing through parotid • Facial nerve • Retromandibular vein • External carotid

  20. Branching of facial nerve (Radiate like goose’s foot – Pes anserinus) Emerges from SM foramen Pierces post. Medial surface Lies superficial to Retromeandibualr vein & Ext. carotid art. Divides into 1. Temporo faicial division - Temporal Zygomatic 2. Cervico facial division - Buccal Marginal mandibular Cervical

  21. Accessory parotid gland

  22. Blood supply Arterial – branches of ext. carotid Veins - to ext. jugular vein Lymphatics – parotid nodes Nerve supply – Secretomotor from both Parasympathetic – Serous Inf. Salivatory nucleus - medulla (auriculo temporal) Sympathetic - Mucinous Sup. Cerv. ganglion (Ext. carotid art.) Vasomotor

  23. Applied anatomy Parotitis – ext capsule adherent – more painful Parotid abscess – horizontal incision Mixed parotid tumor – facial nerve not involved Frey’s syndrome – Penetrating wounds secretomotor fibres of auriculotemporal join with great auricular perspiration of skin covering parotid during eating

  24. Sialography, Sialolith

More Related