Abstract
The aim of this study was to evaluate changes in the concentration of certain components of human unstimulated whole saliva during aging, in order to better understand the role played by aging in oral health. In particular, we studied total protein concentration, alpha-amylase activity, sialic acid content and calcium and phosphorus concentrations in 100 healthy subjects of both genders, aged between 10 and 80 years, who were subdivided into four groups according to their age: 10-25 years, 26-40 years, 41-65 years, and 66-80 years. Other than sialic acid, the concentrations of the components studied were not affected by age. There was a significant negative correlation between sialic acid content and age. Our data indicate the presence of a decreased submandibular/sublingual function with aging, thus suggesting the possibility of a concomitant reduction in the modulating action of unstimulated whole saliva on the oral flora.
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