FIELD: medicine, stomatology. SUBSTANCE: electrode is introduced into mouth cavity to measure local pH in symmetrical points in the following areas: masticatory teeth of right maxillary, maxillary frontal teeth, masticatory teeth of left mandibular, mandibular frontal teeth, masticatory teeth of right mandibular, palate, tongue and hyoid area. At 13% deviation of average local pH value against a norm initial stage of caries is detected. EFFECT: higher accuracy of diagnostics. 2 cl, 2 dwg
