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AN EXPERIMENTAL STUDY OF THE EFFECT ON PULP TEMPERATURE DURING ABUTMENT PREPARATION 지대치 형성이 치수온도에 미치는 영향에 관한 실험적 연구
Byong Ki Kim,
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Pulpal temperature is changed in response for various conditions which were mechanical,
thermal, chemical and biological stimuli.
This study was performed to determine the pulpal temperature changes which were using air
turbine with air-water coolant, water coolant, and conventional dental engine with water coolant
and no coolant no 28 canine of dogs.
In order to record pulpal temperature, pulp chamber was opened on the labiocervical area of
canine.
Thermocouple was inserted into pulp chamber and was fixed with filling material(dycal).
Changes of pulpal temperature were recorded on the physiograph, which had been standardized
temperature degree, through thermocouple to thermistor bridge and carrier preamplifier.
The amount of experimental temperature change to that of control was interpreted in the pulpal
cavity.
1.  The mean normal temperature was 33.07 centigrade.
2.  The temperature was decreased than normal pulpal temperature. It was 12.04 centigrade in
reduction by air turbine with air-water coolant, 7.17 centigrade in reduction by air turbine
with air coolant, 5.54 centigrade in reduction by conventional engine with water coolant, and
1.26 centigrade in reduction by conventional engine with no coolant.
3.  The time for maximal temperature change was 53.3 seconds in reduction by air turbine with
air-water coolant, 73.4 seconds in reduction by air turbine with air coolant, and 27.1 seconds
in reduction by conventional engine with no coolant.
4.  After reduction was ceased, the recovery time to normal pulp temperature was 287.1 seconds
in air turbine with air-water coolant, 189.0 seconds in air turbine with air coolant, 86.9
seconds in conventional engine with water coolant, and 52.9 seconds in conventional engine
with no coolant respectively.

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