TOOTH CIRCULATION:  Control -- Temperature

TEMPERATURE

1. The pulp has good thermal insulation, due to enamel and dentine covering the crown, and dentine and supporting tissue covering the root; however, sustained tooth surface temperature change will eventually change tooth pulp temperature (few minutes)

2. Normal tooth pulp temperature: 35-37 C

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3. Effect of temperature changes

cool vasoconstrict:  blood flow decrease

heat vasodilate:  blood flow increase

high heat injury vascular stasis
(> 45-50 C) (blood flow stops)

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