Fig. 2From: Equine saliva components during mastication, and in vivo pH changes in the oral biofilm of sound and carious tooth surfaces after sucrose exposureMeasurement of plaque pH in situ with the micro-touch method on a carious surface of the infundibulum of the first maxillary premolar tooth. At the end of white plastic holder, there is an ultrathin (0.1 mm in diameter) pH microelectrode, which is connected to reference electrode [7]Back to article page