Sensory response to thermal stimulation in human teeth

By Trowbridge HO, Franks M, Korostoff E, Emling R.

Date: 01/1980
Journal: JOE

Purpose:

Examined the temporal relationship between the application of heat and cold to teeth, the evoked sensory response, and temperature changes in the region of the pulpodentinal junction.

Materials/Methods:

N= 16 teeth to be extracted for ortho treatment from 8 patients were used. Heat and Endo ice were applied and the time elapsed for a response was recorded. Teeth were extracted and a thermal probe was placed to measure temperature changes occurring at Pulpodentinal junction with the application of heat and ice.

Results:

1.Mean response time for ice was 1.5 seconds and 1.3 seconds for heat.

2.The mean time for a temperature change to occur at the pulpodentinal junction was 3.7 seconds.

3.Mean maximum temperature change at the pulpodentinal junction was 3.9 C for heat.

Clinical Significance:

Sensory response to thermal stimulation occurs before there is a temperature change in the region of the pulpodentinal junction where the sensory nerve endings are located.