The aim of this study is the evaluation of pulpal blood flow effect on the thermal levels measured at the pulpodentin junction in human anesthetized premolars. The value have been recorded as discrepancies between peak temperatures caused by a thermal stimulus applied on the same tooth in two different conditions: with and without pulpal blood supply. Thermal stimuli ranged from 3 to 9 degrees C on a total of twelve teeth giving a mean peak difference of 1.3 degrees C. This result has been interpreted as the effect of thermal dissipation produced by pulpal blood flow. The small magnitude of the value suggests, however, that anesthetized pulp fails to protect itself from injurious heat by increasing pulpal blood flow.
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