Article

Safety parameters for pulp temperature during selective ablation of caries by KTP laser in vitro.

Department of Stomatology, University Hospital Saint Pierre, Free University of Brussels, Belgium.
Journal of Clinical Laser Medicine & Surgery 04/2004; 22(2):99-104. DOI:10.1089/104454704774076145 pp.99-104
Source: PubMed

ABSTRACT To define the optimal parameters of KTP laser irradiation during a selective caries removal.
Twelve decayed human teeth, recently extracted were used. Their root canals were prepared for insertion of a thermocouple probe into the pulp chamber. The demineralized tissues were colored by Acid Red 52 before proceeding to different conditions of irradiation.
Pulpal temperature increases (below 3 degrees C) were found under the following parameters with 15 sec of continuous lasing: 400 mWatts, 0.10-msec pulse width, PRR <50 Hz for efficient caries removal. A resting time average of 70 sec was necessary to allow pulp temperature to get back to its baseline.
KTP laser can be used safely and without any pulp over-heating under certain irradiation conditions.

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Keywords

0.10-msec pulse width
 
3 degrees C
 
Acid Red 52
 
certain irradiation conditions
 
continuous lasing
 
decayed human teeth
 
demineralized tissues
 
different conditions
 
efficient caries removal
 
following parameters
 
pulp chamber
 
Pulpal temperature increases
 
resting time average
 
root canals
 
selective caries removal
 
thermocouple probe