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Impact of aging on human salivary gland function: A community-based study

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Abstract

A comprehensive evaluation of salivary flow rates and composition was undertaken in an age- and community-stratified population. A nonmedicated subpopulation was used to assess the effect of “primary aging” on salivary gland function. Unstimulated whole, parotid and submandibular/sublingual (SMSL) saliva, as well as citrate-stimulated parotid and SMSL saliva were collected from 1006 subjects. Flow rates were determined, and the total protein concentrations measured. Height and caloric intake were documented. Subjects were divided into six age groups from 35 to 75+ years old. Significant age-related decreases in the secretion rates of unstimulated whole (p<0.001), stimulated parotid (p<0.01) and unstimulated and stimulated SMSL (both p<0.0001) saliva were observed in the total popu lation. In the non-medicated subpopulation, agerelated decreases in salivary secretions were observed in unstimulated whole (p<0.01) and unstimulated and stimulated SMSL (p<0.01 and p<0.0001, respectively). Multiple regression analysis revealed that, as well as age, caloric intake was related to unstimulated SMSL and stimulated SMSL saliva in the whole population, and height was a contributor to unstimulated whole saliva and unstimulated parotid saliva flow rate variances. In the non-medicated popu lation, caloric intake was the significant independent variable for unstimulated and stimulated parotid secretion, as was height for unstimulated whole and SMSL flow rates. Age-related increases in the total protein concentration of unstimulated parotid (p<0.001) and unstimulated SMSL (p<0.05) saliva were evident in the whole population, but not in the non-medicated subgroup. These data suggest that there are significant age-related alterations in salivary function.

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Authors and Affiliations

  1. Department of Dental Diagnostic Science, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA

    C. K. Yeh

  2. Department of Community Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, Texas, 7703 Floyd Curl Drive, 78284-7917, USA

    D. A. Johnson & M. W. J. Dodds B.D.S., Ph.D

  3. Geriatric Research, Education and Clinical Center, Audie L. Murphy Division, South Texas Veterans’ Health Care System, San Antonio, Texas, USA

    C. K. Yeh

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  3. M. W. J. Dodds B.D.S., Ph.D
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Yeh, C.K., Johnson, D.A. & Dodds, M.W.J. Impact of aging on human salivary gland function: A community-based study. Aging Clin Exp Res 10, 421–428 (1998). https://doi.org/10.1007/BF03339889

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