Histological and ultrastructural effect of an Nd:YAG pulsed laser beam on dental hard tissue and pulp

Costantino Vignato; Giuseppe Vignato; Antonella Nardelli; Arianna Baldan; Pier Nicola Mason

doi:10.1117/12.184912

7 September 1994 Histological and ultrastructural effect of an Nd:YAG pulsed laser beam on dental hard tissue and pulp

Costantino Vignato, Giuseppe Vignato, Antonella Nardelli, Arianna Baldan, Pier Nicola Mason

Proceedings Volume 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV; (1994) https://doi.org/10.1117/12.184912
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

The purpose of this study was to determine histological and ultrastructural modifications produced by an Nd:YAG pulsed laser beam after an in vivo exposure of human molars. Using a Nd:YAG pulsed laser beam delivered by a 600 micrometers optical fiber and concurrent air and water cooling spray, 14 human third molars with artificial first class cavities were exposed at different power levels (6, 7, and 8 W). All the teeth were extracted at different time periods between 10 and 25 days and prepared for histological examination. The results of the histological examination showed no evidence of degeneration or necrosis of the pulpar tissue. Analysis of the dentinal surfaces after exposure demonstrated that the dentinal tubules are completely closed due to the melted dentin. In conclusion a Nd:YAG pulsed laser beam with an air and water cooling spray is safe for treatments of class I decay and no necrosis or degeneration of the pulp was found for laser powers of 6, 7, and 8 W.

Citation Download Citation

Costantino Vignato, Giuseppe Vignato, Antonella Nardelli, Arianna Baldan, and Pier Nicola Mason "Histological and ultrastructural effect of an Nd:YAG pulsed laser beam on dental hard tissue and pulp", Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); https://doi.org/10.1117/12.184912

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