The effect of cations and epigallocatechin gallate on in vitro salivary lubrication.

Ionic valency influences oral processing by changing salivary behavior and merits more attention since little is known. In this study, the influence of three ionic valences (monovalent, divalent and trivalent), ionic strength and epigallocatechin gallate (EGCG) on lubricating properties of saliva were investigated. Tribological measurements were used to characterize the lubrication response of KCl, MgCl, FeCl, and AlCl in combination with EGCG to the ex vivo salivary pellicle.

Lubrication behavior of ex-vivo salivary pellicle influenced by tannins, gallic acid and mannoproteins.

The objective of this study was to investigate the influence of tannins and gallic acid on the salivary lubrication behavior. Furthermore, the effects of pH and mannoproteins in combination with gallic acid on the lubrication of saliva were studied. The addition of gallic acid and tannins were found to increase friction caused by the removal of the saliva film.