Continuous Monitoring of Salivary Flow Rate and pH at the Surface of the Dentition following Consumption of Acidic Beverages
作者:
A. Millward,
L. Shaw,
E. Harrington,
A.J. Smith,
期刊:
Caries Research
(Karger Available online 1997)
卷期:
Volume 31,
issue 1
页码: 44-49
ISSN:0008-6568
年代: 1997
DOI:10.1159/000262373
出版商: S. Karger AG
关键词: Buffering;Dental erosion;Flow rate;PH;Saliva;Soft drinks
数据来源: Karger
摘要:
Use of a splint-mounted flexible pH electrode has allowed reliable continuous monitoring of pH at the surface of the dentition whilst still enabling subjects to drink normally. pH was monitored at the palatal upper left central incisor and upper right first permanent molar sites after drinking 1% (w/v) citric acid. A maximal decrease in pH to values of 2–3 was observed after 1 min followed by a slower recovery which was above pH 5.5 within 2 min at the former site and in 4–5 min at the latter site. A sharp rise in parotid saliva flow rate was seen at 1 min after drinking the same concentration of citric acid by glass, straw or feeder cup, which returned to resting levels within 6 min although the fall-off of flow rate was slower with the feeder cup. Thus, after dietary acid intake the pH at the surface of the dentition is below the critical pH for enamel dissolution for shorter periods than previously suggested, which is probably a reflection of salivary neutralisation and wash
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