Flashcards in Oral Cavity Deck (310)
What is Waldeyer's ring?
Incomplete ring of lymphoid tissue in naso-oropharynx
Body's first line of defence against microbes
What are the main structures of Waldeyer's ring?
Tonsils: lingual, pharyngeal, tubal, palatine
Lymphatic tissue: throughout mucosal lining of pharynx
What are the 6 functions of the oral cavity?
1. Ingestion of food and liquid
What are the 5 features of the maxillary vestibule?
2. Sup. labial frenulum
3. Labial mucosa
4. Alveolar mucosa
5. Attached gingiva
What are the 2 features of the mandibular vestibule?
2. Inf. labial frenulum
What are the 2 structures of the palate?
1. Rugae - identify bodies
2. Palatine raphe - feature from development of palate (fusion of plates)
What are the 4 papillae on the tongue?
1. Circumvallate - ~12 pointing towards oropharynx
2. Filiform - sensitivity to vits.
3. Fungiform - mushroom shape, tastebuds
4. Foliate - irritated by teeth
What are the 2 structures of the floor of the mouth?
1. Lingual frenulum
2. Sublingual papillae/folds
What are oral ulcers?
Break in surface continuity of mucosa with resulting loss of surface epithelium and exposure of underlying CT
Define primary and secondary ulceration
Primary: began as an ulcer
Secondary: began as a blister or vesicle before breaking down
What is RAS?
Recurrent aphthous stomatitis - recurrent ulcers with no obv. cause
What are the 3 types of RAS? Describe the main differences
1. Minor: <5mm, round, shallow; erythematous halo, yellow floor
2. Major: >1cm, deep, irregular; erythematous halo, yellow floor, scars
3. Herpetiform: 1-2mm; >20 present, may coalesce form irregular ulcers, erythematous background
What are the 9 main functions of saliva?
7. Maintenance of tooth integrity
9. Retention of denture
What are the 5 main components of saliva?
What are some inorganic components of saliva?
Na, Cl, K, PO4, HCO3, F, Ca
What is the relationship between flow rate and conc. of saliva components?
Flow rate inc., inc. conc.
Apart from proteins name 8 other organic components of saliva
2. Blood group substances
What are the 9 functions of proteins in salvia?
7. Tissue maintenance
9. Tissue coating
What are the 2 main structures found in salivary glands?
1. Acini: secrete saliva; mucous, serous, myoepithelial
2. Ducts: transport and alter saliva; intercalated, striated, secretory
What is resting secretion?
Saliva that is constantly produced, day and night
Why is resting secretion important?
Saliva breaks down self so more is required to be produced
What is the function of resting secretion?
Keep mouth and oropharynx moist, lubricated and protected
What 5 receptors can stimulate saliva?
1. Olfactory - smell, taste
2. Mechanoceptors - chewing
3. Gustatory - start digestion
4. Nociceptor - lick wounds
5. Higher centres - possibly, control flow
What is whole mouth saliva?
Mixed saliva secretions from all glands
Composition and volume can vary greatly depending on type and length of stimuli
What are the 3 major salivary glands?
Describe the secretions from the 3 major salivary glands
Parotid: serous, high amylase, low Ca
Submandibular: mixed, high Ca
Sublingual: more mucous, high mucins
Describe the secretions from the minor salivary glands
Describe the innervation of the salivary glands
PSNS: H2O release, vasodilation; watery and electrolyte rich
SNS: exocytosis; inc. protein synthesis, thick(?)
What are the 4 functions of mucin?
1. Tissue coating
3. Bacterial aggregation
4. Bacterial adhesion