The Oral Cavity Flashcards
Transition zone between mucous membrane and skin
Vermilion border
Boundary between vermilion border and skin
Mucocutaneous junction
Corner of mouth - junction of upper and lower lip
Commissure
Lines leading away from nose towards mouth
“Smile lines”
Nasolabial groove
Vertical groove at base of nose
Phitrum
Groove below lower lip towards the chin
Labiomental groove
What are the components of the oral cavity?
Lips Teeth Tongue Roof of mouth Floor of mouth Vestibules Oral mucosa Gingiva
How many teeth are there in the primary dentition?
20
What age range does mixed dentition typically occur?
6-12 years
Top side of tonuge - covered with papillae
Dorsum
Describe the underside of tongue
Shiny
Visible blood vessels
Band of tissue attaching center of under surface of tongue to the floor of the mouth
Lingual frenum
Boundary between vermilion border and mucous membrane
Wet dry line
What are the features of the hard palate?
Palatine raphe
Palatine rugae
Incisive papilla
Describe the sides of the hard palate
Not as hard as palatine raphe
Fat and salivary gland tissue beneath surface tissue
Elevation of tissue between and behind central incisors
Incisive papilla
Gets irritated easily
Slightly elevated centerline of hard palate running antero-posteriorly
Line of union of the right and left maxillae
Palatine raphe
Where does the hard palate end?
Opposite the third molar area
Series of elevations (bundles of connective tissue) running side to side in hard palate behind maxillary anterior teeth
Palatine rugae
What is the function of palatine rugae?
Provide tactile sensing of objects/food
Aid in tongue placement
Describe the soft palate (functions and features)
Function: close off nasal pharynx
Features: Uvula, fovea palatinae
No bone beneath the surface
Small fleshy structure hanging from the center of the posterior border of the soft palate
Uvula
Pits in soft palate located at either side of center line - slightly posterior to junction of hard and soft palate
Openings of ducts of a number of palatine glands
Fovea palatinae
What is the main excretory duct of the submandibular gland?
Wharton’s duct
Where does Wharton’s duct open?
Side of lingual frenum
What makes up the sublingual glands?
One large gland and several small glands
Bartholin’s duct
What is the main duct of the sublingual gland?
Bartholin’s duct
Where is Bartholin’s duct located?
Opens near Wharton’s duct
What’s another name for the sublingual folds?
Plica sublingualis
Where are the sublingual folds?
Created by sublingual gland
Extend horizontally to right and left of lingual frenum where it attaches to the floor of the mouth
Openings of ducts from small underlying glands
What is the tissue lining the inside of the cheek?
Buccal mucosa
What is the main excretory duct of the parotid gland?
Stensen’s duct
What is Stensen’s duct?
Flap of tissue that opens opposite maxillary first molar (variable)
Along occlusal plane
Main excretory duct of Parotid gland
Space bounded by the cheek/lip on one side and by the teeth/gingiva covering the bone of the maxilla/mandible on the other side
Vestibule
Mucous membrane that lines the oral cavity
Oral mucosa
What are the types of oral mucosa?
Masticatory
Lining
Specialized
What are the features of masticatory oral mucosa and where is it?
Tightly held down
Hard palate
Gingiva
Mucous membrane and fibrous connective tissue that covers the alveolar process of the jaw and surrounds the necks of the teeth
Gingiva
What defines the lining oral mucosa?
Not tightly held down
What is specialized oral mucosa and where is it?
Tissue covering the tongue
Papillae and taste buds
