Walls and parts of the oral cavity. The oral mucosa. Dr. Altdorfer

Leukoplakia (Precancerous stage!!!)

Parts of the oral cavity Vestibule of oral cavity Oral cavity proper

Parts of the oral cavity 1.Vestibule of the oral cavity Borders: - lips and cheek (bucca) - dental arches 2.Oral cavity proper Borders: - roof: hard and soft palate - floor: oral diaphragm (mylohoid m.) - antero-laterally: dental arches - posteriorly: isthmus of the fauces

Entrance and exit of the oral cavity Philtrum Upper & lower lip Angulus Rubor labii Nasolabial groove (Facial palsy)

Pharyngitis                        <>

roof: hard and soft palate

Structure of the hard and soft palate mucous membrane palatine glands bone / muscles Rugae palatinae

Blood supply and innervation of the hard and soft palate - greater and lesser palatine nerves (maxillary nerve) - nasopalatine nerve greater and lesser palatine arteries

Mucous membrane of the oral cavity: 1. lining mucosa (mobile; ventral side of tongue, mucosa of cheeks, lips, floor of mouth, soft palate), 2. masticatory mucosa (immobile; gingiva, hard palate - Mukoperiosteum) and 3. specialized mucosa (dorsum of tongue: papillae). oral epithelium: keratinized or non-keratinized stratified squamous epithelium lamina propria +minor salivary glands

Histology of the soft palate NASAL SURFACE - Pseudostratified columnar ciliated epith. lamina propria mucous glands striated muscle ORAL SURFACE - stratified squamous non keratinized epithelium

Histology of the hard palate Mucoperiosteum

Sulcus terminalis Foramen cecum Dorsum linguae Pars papillaris Radix linguae Pars follicularis Dorsum linguae Pars papillaris Apex linguae

(Circum)vallate papilla Taste buds

SUBLINGUAL REGION FEATURES OF THE FLOOR - frenulum of tongue - ridge formed by deep lingual vein - sublingual fold - sublingual caruncle (papilla) opening of submandibular and main sublingual duct

floor: ORAL DIAPHRAGM MYLOHYOID M.

Floor of mouth Suprahyoid muscles: Digastric Stylohyoid Mylohyoid Geniohyoid

LATERAL LINGUAL SULCUS Borders: medial: Hyoglossus m. lateral: Mylohyoid m. sup.: Oral mucosa Contents: Lingual n. (from CN V/3) Submandibular duct (Wharton) Hypoglossal n. (CN XII.) (and: sublingual v., sublingual gland) MEDIAL LINGUAL SULCUS Borders: medial: Genioglossus + Geniohyoideus m. lateral: Hyoglossus m. Content: Lingual artery! glossopharyngeal n. (CN IX.) HG MH GG GH

MEDIAL + LATERAL LINGUAL GROOVES Hyoglossus m. Genioglossus Mylohyoid m. Lingual a. Submandibular gland Hypoglossal n.

CT 1. M. mentalis 2. M. depressor angulis oris 3. Mandibula 4. M. mylohyoideus 5. V. sublingualis, Sulcus lateralis linguae 6. M. genioglossus 7. M. hyoglossus 8. Gl. submandibularis 9. V. facialis 10. A. carotis ext. 11. Oropharynx 12. A. facialis 13. V. facialis communis 14. Platysma 15. V. jugularis int. 16. M. stylohyoideus 17. A. carotis int. 18. Mm. longi capitis et colli 19. M. sternocleidomast. 20. V. jugularis ext. 21. M. levator scapulae 22. A. cervic. prof. 23. M. semispin. cerv. 24. M. semispin. capit. 25. M. splenius capitis 26. M. trapezius

CT 19. A. vertebralis 20. Spatium retropharyngeum Csillag A, Anatomy of the Living Human, Könemann, Cologne, 1999 CT 19. A. vertebralis 20. Spatium retropharyngeum 21. Mm. longi capitis et colli 22. M. scalenus post. 23. M. levator scapulae 24. M. splenius capitis 25. M. trapezius 26. Mm. longissimi et semispin. capit. 27. M. semispinalis cervicis 28. Lig. nuchae 1. Mandibula 2. M. mylohyoideus 3. M. hyoglossus 4. M. genioglossus 5. A. lingualis 6. Gl. submandibularis 7. Platysma 8. V. facialis 9. A. carotis ext. 10. Oropharynx 11. Os hyoideum 12. Cart. thyroidea, cornu sup. 13. A. carotis int. 14. V. jugularis int. 15. M. sternocleidomastoideus 16. V. jugularis ext. 17. M. scalenus ant. 18. M. scalenus medius