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[Reactive changes in the periodontal microcirculation under orthodontic forces].

K Hertrich1, W H Raab

  • 1Poliklinik für Kieferorthopädie, Universität Erlangen-Nürnberg.

Fortschritte Der Kieferorthopadie
|October 1, 1990
PubMed
Summary

Intrusive orthodontic forces significantly reduce periodontal blood flow. Lower forces (0.1 N) cause temporary decreases, while higher forces (0.5 N) lead to prolonged, significant reductions in periodontal microcirculation.

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Area of Science:

  • Periodontology
  • Biomedical Engineering
  • Microcirculation Research

Context:

  • Orthodontic treatment involves applying forces to teeth.
  • Understanding the impact of these forces on surrounding tissues is crucial.
  • Periodontal microcirculation plays a vital role in tissue health during tooth movement.

Purpose:

  • To investigate the effects of intrusive orthodontic forces on periodontal microcirculation.
  • To quantify changes in periodontal blood flow in response to varying force levels.
  • To assess the recovery time of periodontal perfusion after force application.

Summary:

  • Laser Doppler flowmetry was used to measure periodontal blood flow in human upper incisors subjected to intrusive forces.
  • A force of 0.1 N resulted in a 20% decrease in perfusion, recovering within 50-80 seconds.

Related Experiment Videos

  • A higher force of 0.5 N caused a 42% perfusion decrease within 2-3 seconds, with no full recovery after 10 minutes.

    • Impact:

    • Demonstrates a dose-dependent relationship between intrusive force magnitude and periodontal perfusion reduction.
    • Highlights the potential for prolonged ischemia with higher intrusive forces, impacting periodontal tissue viability.
    • Provides quantitative data on the immediate and short-term hemodynamic responses to orthodontic forces.