Oral Mucosa Flashcards
Define oral mucosa
The mucosa membrane lining the inside of the mouth
Make properties of oral mucosa
Lighter than skin
Constantly moist
Doesn’t have skin appendages such as hair follicle and sweat glands
What’s are the functions of oral mucosa
- protection against mechanics,abrasive and microbial threats
-sensation-touch,temperature, taste, thirst and pain - secretion -minor salivary glands and limited sebaceous glands
- absorption -sublingual dissolving drugs
- thermal regualtion - only in animals not humans
Name the structure of the oral mucosa top to bottom
Epithelium
Laminate proprietor
Submucosa
Periosteum
Bone
Name 7 types of epithelial tissue
Simple squamous
Simple cuboidal
Simple columnar
Transitional
Stratified squamous
Stratified cuboidal
Pseudostratifidd columnar
Name 5 types of attachments between epithelia cells
Tight junctions
Adherens junction
Desmosomes
Gap junction
Hemidesmosomes
Name different names of keratinocytes
Ortho keratin - no nuclei in superificial layer
Par-keratins - remnants of small nuclei in superficial layer
What are non keratinocytes and name 4 examples
Cells of non keratinised epithelium
Nuclei is in the superficial layer
-melanocytes - immune defence - Antigen presenting cells
-Lange thanks -pigmentation ,synthesis of melanin
-Merkels cells- sensory -tactile sensation
-inflammatory cells
Name layers in keratinised and non keratinised cells
Keratinised cell
- surface layer
Granular intermediate layer (keratonohyaline granules)
Prickles cell layer( tonifibrils)
Basal layer
Non keratinised
- surface layer
Intermediate layer (glycogen)
Prickle cell layer
Basal layer ( tonofilaments )
What components does the lamina propria have
Cells
Fibres
ECM
Blood vessels
What cells are found in oral mucosa
Fibroblasts - synthesis gives and ECM
Endothelial - line blood vessels
Inflammatory
- macrophages - phagocytosis,APCS
-Mast cells- contain histamine and heparin - inflammation anaphylaxis immunity
-lymphocytes - increase during inflammation and secrete antibiotics
What fibres are found in oral mucosa
90% collagen tyep 1
8% collagen type 3
2 % non. Collagenous fibres elastin oxytalan
What is the ECM
Hydrated gel of glycoproteins and proteoglycans
What types of oral mucosa are found in masticatory, lining and tongue
Masticatory -keratinised
Lining- nonkeratinised
Tongue - keratinised
Where are taste buds found
Between soft and hard palate
In the cirumvallate papillae
What are junctions of papillae
Mucocutaneous
Mucodental
Mucogingival
In the lining mucosa soft palate
What is it’s structure in covering epithelium
Lamina propria and submucosa
Covering epithelium - thin, non keratinised, SS epithelium
Lamina propria - THICK with short papillae
Submucosa - diffuse tissue containing numerous minor salivary glands
In the ventral surface of the tongue
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: thin non keratinised SS epithelium
LP: thin numerous short paillaire and elastic fibres, few minor salivary glands, a capillary network in subpapilalry layer
SM: thin and irregular
Mucosa bound to connective tissue surround tongue muscualotr
In the floor of mouth
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: Very thin, non keratin SS epithelium
LP: short papillae some elastic fives
Extensive vascular supply
SM: loose fibrous connective tissue containing fat and minor salivary glands
In the labial and buccaneers mucosa
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: VERY THICK, non keratinised SS epithelium
LP: long slender papillae , dense fibrous connective tissue containing collagen
SM: mucosa attached to underlying muscle by collagen and elastin
Dense collagenous connectuve tissue
Lips : vermillion zone
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: thin orthokeratinized SS eptiehialum
LP: numerous narrow papillae
SM: mucosa attached to underlying muscle
Lips: intermediate zone
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: thin parakeratinised
LP: long irregular papillae
In the masticatory mucosa gingiva
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: thick ortho para keratinised ss epithelium
LP: long narrow papillae dense collagenous connective tissue
SM: no distinct layer, mucosa firmly attached by collagen fibres to cementum and periosteum
In the hard palate
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: thick orthokeratinsied SS
LP: long papillae
SM: dense collagenous connective tissue
In the specials mucosa dorsal surface of tongue
What is it’s structure in covering epithelium
Lamina propria and submucosa
CE: thick keratinised and non SS epithelium forming 3 types of papillae
LP: long papillae, rich innervation near taste buds
Minor salivary glands in. Posterior portion
SM: no distinct layer
Mucosa bound to connective tissue
