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Related Experiment Videos

The pH value changes in the periodontal pockets

T Watanabe1, W Soeda, K Kobayashi

  • 1Department of Geriatric Dentistry, Faculty of Dentistry, Tokyo Medical and Dental University.

The Bulletin of Tokyo Medical and Dental University
|December 1, 1996
PubMed
Summary

New pH sensors accurately measure periodontal pocket acidity, aiding diagnosis. Pocket pH varies by location and tooth condition, unlike salivary pH.

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Area of Science:

  • Biomedical Engineering
  • Periodontology
  • Sensor Technology

Background:

  • Periodontal pocket pH measurements offer insights into periodontal tissue health.
  • Previous pH sensors had limitations including size, slow response, and instability.
  • Reliable data on periodontal pocket pH has been scarce due to sensor limitations.

Purpose of the Study:

  • To develop and evaluate a novel, miniaturized pH sensor for periodontal pockets.
  • To assess the feasibility of using this sensor for long-term pH monitoring in vivo.
  • To investigate the relationship between periodontal pocket pH and clinical parameters.

Main Methods:

  • Developed a miniaturized iridium oxide pH sensor using D.C. reactive sputtering.
  • Tested sensor performance for response speed, stability, and durability.
  • Measured periodontal pocket pH in 16 subjects over 7-73 weeks.

Main Results:

  • The new sensor demonstrated miniaturization, rapid response, and stability.
  • Periodontal pocket pH varied significantly between measurement sites within subjects.
  • pH levels fluctuated over time and correlated with tooth condition.
  • Salivary pH showed no correlation with periodontal pocket pH.

Conclusions:

  • The developed sensor is effective for measuring periodontal pocket pH.
  • Periodontal pocket pH is dynamic and influenced by local factors.
  • This technology holds potential for improved diagnosis and monitoring of periodontal disease.

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