In Vivo Assessment of Plaque Acid Production. A Long-Term Retrospective Study

Measurement of Interdental Plaque pH in Humans with an Indwelling Glass pH Electrode following a Sucrose Rinse: A Long-Term Retrospective Study (Short Communication)

“…Results are pre sented in figures 1 and 2. It would appear that at least until day 5 there are differ ences among the volunteers in plaque pH changes following a sucrose rinse; this is in agreement with results from the earlier retrospective study of Imfeld [1978] and of other investigations of plaque pH changes [Edgar, 1976;Schachtele et al, 1981;Wei et al, 1981], though with older plaques, i.e. after day 5, the differences do not seem as marked.…”

Oral Starch Degradation and Its Influence on Acid Production in Human Dental Plaque

“…Factors contributing both to the rate of starch hydrolysis and to its oral clearance seem to be of equal importance in determin ing the acidogenic potential of a starch-con taining product.Thus, the results of intraoral plaque pH telemetry with starch-containing foods showed a greater variability than those obtained with sucrose [Imfeld, 1978], a substrate which can be metabolized direct ly by plaque bacteria and can diffuse into plaque [Asknes, 1976[Asknes, , 1978. The results of previous experiments on the influence of starch on glycolytic acid formation in saliva and plaque in vitro [Miller, 1890;Morch, 1961;Frostell, 1970Frostell, , 1971Birkhed and Fuchs, 1975;Birkhed and Skude, 1978] and in vivo [Stephan, 1940;Neff, 1967;Graf, 1969;Imfeld, 1977] were confirmed for the wheat starch preparations used in this work.…”

Effect of Dental Plaque Age and Bacterial Composition on the pH of Artificial Fissures in Human Volunteers

“…These results are different from those ob served with telemetry from other sites in the dentition. When the effect of time of accumulation on the acidogenic response of plaque on buccal [Jensen et al, 1981] and proximal [Imfeld, 1979;Schachtele and Jensen, 1982] surfaces was monitored there was no evidence that there was a decrease in acid production. At these two sites the lowest minimum pH is achieved after 2-3 days of plaque accumulation and this mini mum stays the same or is slightly lower with older plaques.…”

“…Teleme try studies using glass pH electrodes attached to buc cal tooth surfaces demonstrated that with 4-day-old plaque on the electrode the minimum pH achieved after a 10% sucrose (w/v) rinse was approximately 4.4 [Jensen et al, 1981]. Studies from two laboratories [Imfeld, 1979;Schachtele and Jensen, 1982] with elec trodes positioned at interproximal sites demonstrated that 4-day-old plaques reached a minimum of 4.2-4.1 after a similar sucrose challenge. As demonstrated in figure 1 and table 1, the plaque pH at the base of fis sures containing 4-day-old plaque dropped to only 5.0.…”