Clinical Significance of Saliva Flashcards
What happens when Saliva is absent?
Xerostomia
What are symptoms of xerostomia?
teeth/gum damagae, tonsillitis, mastication/swallowing problems
What causes Xerostomia?
1) Autoimmune disease e.g. Sjogrens syndrome
2) Medication
3) Cancer therapies e.g. radio/chemo therapy
What happens in Sjogrens syndrome?
parotid/sub maxillary gladn dysfunction so dry eyes
What happens in radiation therapy?
Serous acinar cells in Parotid are sensitive
What happens in Chemotherapy?
Change in salivary flow rate and composition
What are salivary stimulation treatments?
- Chewing sugar free gum
- Salivary sub. e.g oralube
- Water based gels
- Cholinergic agonists
What do cholinergic agonists do?
provide parasymp. stimulation to exocrine gland so serous secretions
What are Antimicrobial salivary defences?
- Lysozyme
- Immunoglobins
- Lactoferrin
How does saliva protect hard tissues?
- buffers
- Fluoride
- pellicle proteins
- Ca/Phosphate
How does saliva protect soft tissues?
Growth factors and lactoperoxidase
How does saliva maintain airways?
Antibacterials so no microorganisms
How does saliva maintain speech?
Lubrication so no dehydrations
How does saliva maintain swallowing/mastication?
Lubrication so no abrasion
How does saliva maintain control of bacteria?
Antibacterials/Lactoferrin/Lysozyme so no infections
How does saliva maintain digestions
amylase
How does saliva maintain oral mucosa?
Growth Factors/mucin film so no tissue damage
How does saliva maintain dentition?
Ca/(P04)3- / F/ pellicle proteins so no caries/perio. dise
How does saliva maintain GI tract?
Antibacterials
Where does saliva derive from?
Major glands
Minor glands
Crevicular fluid
What has the highest % volume of Saliva?
Submaxillary
What has the lowest % volume of Saliva?
Sublingual `
What are Sialogogues?
Salivary stimulant like NaCl/ Sucrose
What is Salivary flow rhythm?
Circadian
Where is fluoride more retained?
Upper sulcus
How to sample Saliva?
Paper points = very specific
Why do we need immediate analysis of saliva?
Lose enzyme activity loss of c02 pH change Protein denature cell lysis