Anatomy II Head & Neck BY: DR.Yahya Alfarra CANADIAN BOARD IN DENTISTRY - PowerPoint PPT Presentation

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Anatomy II Head & Neck BY: DR.Yahya Alfarra CANADIAN BOARD IN DENTISTRY

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  1. Anatomy II Head & Neck BY:DR.Yahya AlfarraCANADIAN BOARD IN DENTISTRY

  2. Parotid gland :: Size : it’s the largest salivary gland & it’s compose of serous acini. Shape : it’s wedge shaped , Site & extension : it lies between the ramus of Md. & SCM It extends : Upward: to zygomatic arch Downward: to angle of Md. Anteriorly: to cover part of masseter ms. Posteriorly: to overlap SCM Parotid region

  3. Length : 5 cm long Beginning : at the ant. Border of the gland End: by opening into the oral cavity opposite the upper 2nd molar tooth Parotid duct(stenson’s duct)

  4. Opens in the oral cavity opposite to the second upper molar tooth.

  5. Blood supply of P.G • Arterial supply : small branches from ECA inside the gland • Venous drainage: into retromandibular V. • Lymphatic drainage : into deep & superficial parotid lymph node • Nerve supply of parotid :Sensory : great auricualr N. auriculotemporal N.

  6. Superficial temporal artery

  7. Temporal region • Temporal fossa • Infratemporal fossa • MuSclE OF mastications

  8. Boundaries : Sup. Temporal line ……… above Zygonatic arch…………….below Frontal process of zygomatic bone……………………….ant. Contents(attachments): 2 superficial Ms of mastications Muscles : a) temporalis Ms. b) masseter Ms Nerves : a ) deep temporal N. b)auriculotemporal N. Vesseles: superficial temporal A. Temporal fossa

  9. Boundaries: Anteriorly: post. Surface of maxilla Posteriorly : styloid & mastoid process Medially: lateral pterygoid plate Laterally : coronoid process & ramus of Md. Contents: Muscles : 2 deep Ms of Mastications a) medial pterygoid Ms. b ) lateral pterygoid m. Nerves: a ) Md. N. b ) chorda tympani c ) Mx. N. Vesseles : a ) Mx. A. b ) pterygoid plexus of viens Infratemporal fossa

  10. Muscles of mastications

  11. Muscles of mastications

  12. Submandibualr region • Definition: it’s the regoin between Md. & hyoid bone. • It contains : • Muscles: digastric, mylohyoid , hyoglossus, geniohyoid , genioglossus & styloglossus • Salivary gland : submandibualr & sublingual • Nerves : lingual , glossopharyngeal & hyoglossal • Blood vesseles: facial A. & V. , Lingual A. & V. • Parasympathetic ganglion : submandibualr • Lymph nodes : submandibualr group

  13. Muscles of sumandibualr region

  14. Muscles of sumandibualr regoin

  15. Salivary gland

  16. Site & extension: It lies below Md. It extends to : Mylohyoid line : a bove Digastric muscle : below Mental foramen : anterior Angle of Md. : posterior Size: about ½ the size of P.G. Shape: wedge shape Structure: it consists of 2 parts,a large superficial part & a small deep part Submandibular gland

  17. It’s 5 cm long It’s duct open into the floor of mouth close to frenulum of tongue. Submandibular duct

  18. Blood supply of gland: • The arterial supply:the gland is supplied by branches of facial & lingual A. • The viens drain into facial & lingual V. • Nerve supply : • sympathetic :from plexus arround lingual A. • Parasympathetic:from facial N.

  19. Site: beneath tongue Size: it’s the smallest of the 3 S.G. Shape: almond-shaped Relation : Ant. : the gland of the opposite side Post. : the deep part of submandibualr gland Med. : genioglossus Ms. , lingual N. & submand. Duct Laterally: sublingual fossa of Md. Sup. : mucous membrane of mouth(which elevated to form sublingual fold) Inf. : mylohyoid Ms. Sublingual gland

  20. Sublingual duct : It opens directly in the floor of mouth on sublingual fold • Blood supply :the gland is supplied by branch of facial & lingual A. The viens drain into facial & lingual V. • Nerve supply : • sympathetic :from plexus arround lingual A. • Parasympathetic:from facial N.

  21. Nerves OF submandibualr regoin lingual , glossopharyngeal & hyoglossal N.B. : lingual N. : branch of post. Division of Md. N. in the infratemporal fossa • Blood vesseles submandibualr regoin : facial A. & V. , Lingual A. & V. N.B. Facial A. : Branch of ECA Facial V. : It units ant. Division of retromandibualr V. TO drain into IJV Lingual A. : Branch of ECA Lingual V. : drain into IJV

  22. Good luck