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Related Experiment Videos

Pulpal responses to cooling tooth temperatures.

H E Goodis1, V Winthrop, J M White

  • 1Department of Restorative Dentistry, University of California School of Dentistry, 707 Parnassus Avenue, San Francisco, CA 94143-0758, USA.

Journal of Endodontics
|February 24, 2001
PubMed
Summary

Lowering tooth temperature reduces pulp blood flow and tooth sensitivity. Even when teeth become unresponsive, pulpal blood flow persists, indicating complex responses to cold stimuli.

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Area of Science:

  • Dentistry
  • Physiology

Background:

  • Tooth temperature significantly influences pulpal nerve function.
  • Understanding the relationship between pulpal blood flow and nerve response is crucial for dental diagnostics.

Purpose of the Study:

  • To investigate the effects of reduced tooth temperature on pulpal blood flow and sensory thresholds.
  • To determine if pulpal blood flow cessation is necessary for abolishing tooth sensitivity.

Main Methods:

  • Laser Doppler flowmetry was used to measure pulpal blood flow.
  • Electric pulp testing assessed sensory thresholds.
  • Gingival microcirculation was shielded using dark rubber dams.

Main Results:

  • Decreased tooth temperature led to reduced tooth responsiveness and slowed pulpal blood flow.

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  • Sensory thresholds were altered and, in some cases, abolished.
  • Pulpal blood flow did not cease entirely even when sensitivity was lost.

    • Conclusions:

    • Tooth cooling affects both pulpal blood flow and nerve sensitivity.
    • Complete cessation of pulpal blood flow is not required to eliminate tooth sensitivity to electrical stimulation.