Age and Ageing, Vol 28, 557-561, Copyright © 1999 by British Geriatrics Society
D Fischer and JA Ship
BACKGROUND: although several reports indicate that qualitative and
quantitative assessments of parotid salivary function are age-stable in
healthy adults, there have been no studies of the influence of age on the
variability of repeated parotid flow rates. OBJECTIVE: to examine the
influence of age on the variability of repeated parotid flow rates in
unmedicated, healthy adults. MATERIALS AND METHODS: we assessed unilateral
unstimulated and 2% citrate-stimulated parotid flow rates and collected
responses to a five-item subjective xerostomia questionnaire in 14 subjects
aged 20-40 years and 14 subjects aged 60- 80 years. All subjects were
healthy and unmedicated. We collected saliva and asked subjects to complete
the questionnaire at baseline, 1 h and 2 h. RESULTS: unstimulated and
stimulated parotid flow rates were similar at each time point in young and
older subjects, and remained stable over the collection period. There were
no differences in the standard deviations of the three collections of
unstimulated and stimulated flow rates between young and older subjects.
There were no differences between questionnaire responses between the two
groups, and no change in response over time. CONCLUSIONS: there is no
increased age- related variability in parotid salivary flow rates over
repeated measures. Stimulated parotid flow rates are stable over 2 h in
healthy people, and are similar in young and older individuals. These
results suggest that parotid glands have a large secretory reserve.
ARTICLES
Effect of age on variability of parotid salivary gland flow rates over time
Department of Oral Medicine/Pathology/Oncology, University of Michigan School of Dentistry, Ann Arbor 48109-1078, USA.
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