Holmium:YAG laser in dentistry: photoconditioning of dentinal surfaces

Raleigh A. Holt; Robert E. Nordquist

doi:10.1117/12.184914

7 September 1994 Holmium:YAG laser in dentistry: photoconditioning of dentinal surfaces

Raleigh A. Holt, Robert E. Nordquist

Proceedings Volume 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV; (1994) https://doi.org/10.1117/12.184914
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

This in vitro study was undertaken to determine energy levels necessary to produce tubule closure and surface smoothing on dentinal surfaces of human teeth and their resultant temperature increases within the pulpal canals with the Holmium:YAG laser. An optimal working spot size and even absorption pattern were produced by defocusing the laser beam and evaluated by images produced on light exposed and developed photographic paper. The surface effects on dentin were examined by scanning electron microscopy. A thermocouple was positioned in the canals of fresh dissected dog jaws and attached to a recorder which produced a graph of the temperature changes. The in vitro research model for intrapulpal temperatures changes was verified by comparing premortem and postmortem temperature readings. The same protocol was used to evaluate temperature changes in fresh human extracted teeth. In vivo histological studies were conducted to evaluate the effects of HO:YAG laser energy on pulpal tissues. The results of these studies indicate the HO:YAG laser at a wavelength of 2.12 microns can be safely and effectively used for photoconditioning of the dentinal surfaces of teeth in clinical conditions.

Citation Download Citation

Raleigh A. Holt and Robert E. Nordquist "Holmium:YAG laser in dentistry: photoconditioning of dentinal surfaces", Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); https://doi.org/10.1117/12.184914

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