Oral Cavity Flashcards
The superior border of the oral cavity consists of what?
Hard palate and soft palate
The anterior border consists of what?
Lips
The lateral walls consist of what?
Cheeks
The inferior border consists of what?
Mucous membrane covering mylohyoid muscle and is mainly occupied by the tongue
The posterior border consists of what?
Oropharyngeal isthmus
The vertical groove on the midline of he upper lip is called what?
Philtrum
What are the three types of oral mucosa?
Lining
Masticatory
Specialized
What are the non keratinocytes in the epithelia?
Langerhans cells
Merkel cells
Melanocytes
Lymphocytes/leukocytes
What layer does the submucosa lack that intestinal mucosa has?
Muscularis mucosa
What is characteristic of specialized oral mucosa?
- Lacks submucosa
- lamina propia attaches directly to the bone
Where is masticatory mucosa found?
Gingiva
Hard palate
Where is lining mucosa found?
Lips Cheeks Floor of mouth Soft palate Ventral tongue
Where is specialized mucosa found?
Dorsum of tongue
What are the three types of stratified squamous epithelium found in the oral mucosa?
Orthokeratinized (no nuclei)
Parakeratinized (some nuclei)
Non-keratinized
What are the 4 layers of keratinized epithelium?
1-stratum corneum (no nuclei/keratin layer)
2-stratum granulosum (keratin starts forming)
3-stratum spinosum (desmosomes)
4-stratum basale (stem cells, Hemidesmosomes)
How can you tell where the mucogingival junction is? (Looking at a slide)
- Attached is ortho keratinized with dense lamina propria
- alveolar is non-keratinized and has loose lamina propria
The vermilion border has a ______ keratin layer
Thin
The labial mucosa is _____ keratinized and has _______ epithelium
Non, thick
What role do merkel cells play?
Essentially nerve cells in the basal layer of gingival epithelium for touch and pressure
What role do langerhan cells play?
Migratory professional antigen presenting cells
What are the 4 types of papillae in specialized mucosa on the tongue?
Filiform
Fungiform
Foliate
Circumvallate
What do von ebner glands do?
Produce a serous fluid to wash out crypts
Characteristics of filliform papillae
Thick keratin
Sharp shape
Most numerous
Provide friction
Characteristics of fungiform papillae
Mushroom shaped
Non-keratinized
