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[Temperature-dependent changes in the microcirculation of the dental pulp]
Deutsche Zahnarztliche Zeitschrift
|July 1, 1989
Summary
Dental pulp blood flow changes with temperature. Cold reduces flow, while heat above 43°C increases it, with temperatures over 49°C causing irreversible damage. This response is mediated by tooth pulp
Area of Science:
- Dental research
- Physiology
- Microcirculation
Context:
- Understanding dental pulp blood flow dynamics is crucial for diagnosing and treating dental conditions.
- Thermal stimuli are common in dental practice and can elicit physiological responses in the pulp.
Purpose:
- To investigate the effects of varying thermal stimuli on dental pulp blood flow using Laser Doppler flowmetry.
- To determine the temperature thresholds for changes in pulp blood flow and identify potential for irreversible damage.
- To elucidate the neural pathways (afferent vs. sympathetic innervation) responsible for the reactive increase in pulp blood flow.
Summary:
- Laser Doppler flowmetry revealed that temperatures below 31°C decrease dental pulp blood flow, while temperatures above 43°C increase it.
- Temperatures exceeding 49°C led to irreversible damage to the pulp's microcirculation.
- Experimental nerve blocks indicated that the heat-induced increase in blood flow is primarily mediated by afferent, not sympathetic, innervation of the tooth pulp.
Impact:
- Provides critical data on the thermal sensitivity and vulnerability of dental pulp microcirculation.
- Informs clinical decisions regarding the use of thermal stimuli in dental diagnostics and treatments.
- Enhances understanding of neurovascular regulation within the dental pulp, aiding in the management of pulpitis and other dental pathologies.