title: Measuring salivary flow: challenges and opportunities.
abstract: BACKGROUND
  Saliva is being studied extensively and is being used for risk assessment, diagnosis and monitoring high-risk behavior and disease progression. A variety of medical conditions and medications are associated with salivary gland hypofunction. The major disadvantage in the use of saliva for health-related purposes is the lack of standardization in saliva collection methods.
  
  
  METHODS
  The authors provide a brief overview of different methods of saliva collection and the advantages and disadvantages associated with each method, as well as of how to assess the salivary flow rate.
  
  
  RESULTS
  The authors present the complete set up and step-by-step guidelines for the collection of unstimulated and stimulated whole saliva.
  
  
  CONCLUSIONS
  The life expectancy of people will continue to increase with advances in medicine and therapeutic modalities, and the prevalence of salivary gland hypofunction in the elderly population will increase owing to their longevity. The assessment of salivary gland hypo-function will need to be incorporated into everyday clinical practice.
  
  
  CONCLUSIONS
  The saliva collection methods outlined in this article can be used by dentists to assess patients at risk of developing diseases and by scientists for scholarly activities.
authors.affiliation: Division of Diagnostic Sciences, University of Southern California School of Dentistry, 925 W. 34th Street, Los Angeles, CA 90089, USA.
authors.forename: Mahvash
authors.initials: M
authors.lastname: Navazesh
authors.forename: Satish K S
authors.initials: SK
authors.lastname: Kumar
mesh_terms: D006801:Humans; D010812:Physical Stimulation; D012463:Saliva / Q000378:metabolism*; D012469:Salivary Glands / Q000378:metabolism; D012636:Secretory Rate; D013048:Specimen Handling / Q000379:methods*; D013268:Stimulation, Chemical; D014987:Xerostomia / Q000503:physiopathology