IADR Abstract Archives
Relationship of Saliva Viscosity and pH at Resting and Stimulation
Objectives: The salivary viscosity was greatly involved in lubrication effects to smooth off tongue and labial movement, and it has been thought about not only being essential to perform functions such as eating, deglutition, the pronunciation smoothly, but also having an influence on the intraoral environment such as caries or periodontal disease. We have reported that a disposable, small amount, convenient EMS viscometer for measuring saliva viscosity can be applied. In this study, we examined the relationship of saliva viscosity and pH at resting and stimulation.
Methods: Subjects are 15 normal adults of 20 - 40 years old. Measurement of saliva viscosity was performed by taking a sitting position and resting the mixed saliva stored at the bottom of the mouth with a pipette. For stimulated saliva, 1 g paraffin pellet was chewed for 5 minutes and collected by spitting method. Immediately after collection, the sample was injected into a glass test tube and inserted into an EMS viscometer. The EMS viscometer was set at a measurement temperature of 36.0 ° C., the number of measurements was 5, and the average value thereof was obtained. The pH measured using an examination for pH paper (Merck company). The statistics used wilcoxon-test and spearman-correlation-test.
Results: The resting saliva viscosity is 3.30 ± 1.25mpa/s. The saliva viscosity at stimulation was 1.42 ± 0.37mpa/s. A significant difference was found in resting and salivary coefficient of viscosity stimulating. There was also a significant difference in pH of saliva at rest and during stimulation. A correlation was found between pH, and there was not the correlation between pH with saliva coefficient of viscosity at stimulation with saliva coefficient of viscosity at rest.
Conclusions: It was found that pH was low so that saliva viscosity was high. As for the measurement of the saliva viscosity, the intraoral environmental likelihood that we could evaluate to assume buffer capacity a representative was suggested.
Methods: Subjects are 15 normal adults of 20 - 40 years old. Measurement of saliva viscosity was performed by taking a sitting position and resting the mixed saliva stored at the bottom of the mouth with a pipette. For stimulated saliva, 1 g paraffin pellet was chewed for 5 minutes and collected by spitting method. Immediately after collection, the sample was injected into a glass test tube and inserted into an EMS viscometer. The EMS viscometer was set at a measurement temperature of 36.0 ° C., the number of measurements was 5, and the average value thereof was obtained. The pH measured using an examination for pH paper (Merck company). The statistics used wilcoxon-test and spearman-correlation-test.
Results: The resting saliva viscosity is 3.30 ± 1.25mpa/s. The saliva viscosity at stimulation was 1.42 ± 0.37mpa/s. A significant difference was found in resting and salivary coefficient of viscosity stimulating. There was also a significant difference in pH of saliva at rest and during stimulation. A correlation was found between pH, and there was not the correlation between pH with saliva coefficient of viscosity at stimulation with saliva coefficient of viscosity at rest.
Conclusions: It was found that pH was low so that saliva viscosity was high. As for the measurement of the saliva viscosity, the intraoral environmental likelihood that we could evaluate to assume buffer capacity a representative was suggested.