Oral Cavity - Colombo Flashcards
What are the boundaries of the Oral Cavity?
From the opening of the mouth all the way to the oropharynx
What is the differences between the oral “vestibule” and the oral cavity “proper”
Vestibule - Everything outside the teeth
Proper - space inside the teeth (where your tongue lives)
What is the main function of the oral mucosa?
To keep the the oral cavity moist
T or F: The oral cavity is only made up of stratified squamos keratinized epithelium
False: both keratinized & non-keratinized
Which of the two has sharper, more pronounced rete pegs, Lining or masticatory mucosa?
Masticatory mucosa has sharper, more pronounced rete pegs
T or F: lining mucosa is Non-Keratinzied epithelium
True
What structures comprise the lining mucosa?
Cheeks, INSIDE of lips, floor of mouth, ventral tongue soft palate
What structures comprise the masticatory mucosa?
Gingiva
Dorsum of tongue
Hard palate
Remember: masticatory mucosa is KERATINIZED
What structure does Oral Mucoperiosteum lack that General Oral Mucosa has?
Mucoperiosteum lacks submucosa layer
Main difference between Orthokeratinized and Parakeratinized Oral mucosa?
Ortho contains NO NUCLEI
whereas
Para has a few lonely nuclei
What are the 4 layers of keratinocyte differentiation (aka layers of epidermis but also applies to oral mucosa)
- Stratum Corneum
- Stratum Granulosum
- Stratum spinosum (prickle)
- Stratum basale
All of these layers make up non keratinized epithelium EXCEPT….?
- Surface Layer
- Granular intermediate layer
- Prickle cell layer
- Basal cell layer
- Granular intermediate layer
Only in keratinized epithelium
The hard palate has Keratinized/Non-keratinized epeithlium?
Keratinized
State the 3 types of gingiva
- Attached: bound to bone
- Free: found around unattached around cervical region
- Interdental: between teeth
90% of cells found in the oral mucosa are….?
Karatinocytes
