1. Landmarks of the Face and Oral Cavity

2. Landmarks of the Face Nostril Ala of the Nose
Openings to the nasal cavity
Lined w/ mucosa
Cilia
Nasal hair
Ala of the Nose
Wing of the nose
outer edge of nostril

3. Landmarks of the Face Philtrum V-shaped depression Labial Comissures
Below the nose
Above the upper lip.
Midline
Labial Comissures
corners of mouth
Herpetic lesions
often found here
Labial Commissure
Labio-mental
groove

4. Lips Lips Labial Tubercle Covered w/ skin on outside, mucosa inside
Vermillion Zone
reddish portion
Lip stick goes here
Vermillion Boarder
Edge of the lips
Lip liner goes here
Labial Tubercle
Tip of the upper lip
Protrusive tissue

5. Ears Lobule aka ‘lobe’ Helix Tragus Fatty tissue that hangs down.
Outer edge of the ear
Tragus
Cartilage
Covers ear canal opening
Ala-tragus plane

6. Facial Grooves Naso-labial groove Labio-mental groove Groove from
AKA sulcus
Groove from
ala of the nose to
corners of mouth
Labio-mental groove
Groove between the
lip and chin

7. Landmarks of the Oral Cavity
Oral Vestibule aka
Labial vestibule
Buccal vestibule
Pocket inside mouth where cheek meets gingiva
Located on
Max. and Man.
‘Chew’ is placed here
Vestibular Fornix
Deepest part of the vestibule

8. Oral mucosa Mucosa Labial mucosa Buccal mucosa
Tissue that lines inner surface of lips & cheeks
Labial mucosa-lines the lips
Fordyce’s spots found in labial mucosa (small yellowish glands)
Buccal mucosa-lines the cheeks
Stensen’s duct is located on buccal mucosa
Labial mucosa
Buccal mucosa

9. Landmarks of the Oral Cavity
Gingiva
AKA gums
Firmly attached
Dense, fibrous tissue withstands chewing pressure
Pink
Stippled

10. Frena / Frenum Frena Raised lines of mucosal tissue
Frenum (singular)
Raised lines of mucosal tissue
Extends from vestibule to labial & buccal mucosa
Attaches tongue to floor of the mouth

11. Landmarks of the Oral Cavity
Palate
AKA roof of the mouth
2 sections: Hard & Soft Palate
Hard Palate-Anterior portion
Palatine rugae
Ridges on roof of mouth
Palatine raphe
Seam down center of palate
Soft Palate-Posterior portion
Uvula is projection – extends off back of soft palate

12. Exostosis Bony growth Torus palantinus Projects from a bony surface.
Anywhere in the body
Torus - singular
Tori - plural
Oral cavity
Torus palantinus
Aka palatal tori

13. Mandibular Tori
Torus Mandibularis (excess bone under tongue, AKA tori)
Uni-lateral
One side
Bi-lateral
Both sides
Buccal
Towards the cheek

14. Landmarks of the Oral Cavity
Tongue
Glossus muscle
Glossitis
Inflammation of the tongue
Papilla (taste buds) on dorsal side
Filiform papillae (hair like projections)
Fungiform papillae (strawberry effect)
Median sulcus divides tongue in half

15. Salivary Glands Secrete saliva Three Pairs of Salivary Glands
aid in digestion process
Three Pairs of Salivary Glands
Parotid
Largest
Secretes saliva via the Stensen’s duct
Located by #2 & 15

16. Salivary Glands Sub-Mandibular Sub-Lingual Size of walnut
Secretes saliva via the Wharton’s duct
Located in area of #24 & 25
Sub-Lingual
Smallest gland
Secretes saliva from under the tongue
Many ducts
Like a ‘soaker’ hose

17. Saliva 5 major functions of Saliva Aids in digestion Helps swallowing
Enzyme (salivary amylase)
Helps swallowing
Lubrication
Provides moisture to mouth (washes off teeth)
Provides fluoride to teeth
Breaks down carbohydrates

18. Conclusion
Knowing and understanding landmarks of the oral cavity is very important.
Understanding word parts will make it easier to learn landmarks.
Materials, techniques and instructions will be related to landmarks.
Any questions??