pH measurements with an ion sensitive field effect transistor in the mouth of patients with xerostomia.
A transistor pH electrode (ion sensitive field effect transistor), placed in the upper dentures of eleven xerostomia patients and five healthy volunteers, was used to register pH changes in five-, six- and seven-day-old dental plaque. A mouth rinse with a 10% sucrose solution caused a pH fall of about three decades. A significant difference in duration of critical plaque pH was observed: in xerostomia patients, a 10% longer period of pH less than 5.7 was registered during 60 min following a sucrose rinse. Normal oral functions were not influenced by the denture with an integrated electrode. This method is usable for plaque pH registration in xerostomia patients.
Visch
L L
LL
Dr. Daniel den Hoed Cancer Center, Rotterdam Radio-Therapeutic Institute, The Netherlands.
Bergveld
P
P
Lamprecht
W
W
's-Gravenmade
E J
EJ
D002138:Calibration; D003773:Dental Plaque / Q000378:metabolism*; D003778:Dentures; D004566:Electrodes; D006801:Humans; D006863:Hydrogen-Ion Concentration; D014987:Xerostomia / Q000378:metabolism*