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Proceedings Paper

Association of Er:YAG and Nd:YAG irradiation for apicoectomy and retrofilling cavity preparation compared to conventional technique: a permeability study
Author(s): Selma Christina Cury Camargo; Giulio Gavini; Carlos de Paula Eduardo; Carlos Eduardo Aun; Luciano W. Ribeiro; Jeffrey M. Coil
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Paper Abstract

The aim of this research was to evaluate dentin permeability effects at the apical cut surface prepared with Er:YAG laser and irradiated with Nd:YAG laser compared to conventional techniques. 62 extracted human teeth were divided into four groups of 7 teeth each. For Group 1 apicoectomy was performed using high speed handpiece and diamond burs. Group 2 was prepared as group 1 and lased with Nd:YAG (1W,15Hz of energy before retrograde cavity filling). For group 3 Er:YAG* laser irradiation (wavelength of 2.94μm, pulse width of 250-500μs)was used in 400mJ of energy, frequency of 6Hz, on focus mode under distilled water refrigeration and group 4 was performed as group 3 and lased with Nd:YAG (1W, 15Hz of energy before retrograde cavity filling). Permeability was evaluated by the extent of methylene blue dye penetration into the tubules. There were statistically significant differences in permeability between groups. Nd:YAG laser irradiation significantly reduced apical dentin permeability when compared to unlased groups. Er:YAG laser by itself showed higher percentage of dye penetration.

Paper Details

Date Published: 19 May 1999
PDF: 5 pages
Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999); doi: 10.1117/12.348325
Show Author Affiliations
Selma Christina Cury Camargo, Univ. of Sao Paulo School of Dentistry (Brazil) and Univ. Cidade de Sao Pa (Brazil)
Giulio Gavini, Univ. of Sao Paulo School of Dentistry (Brazil) and Univ. Cidade de Sao Pa (Brazil)
Carlos de Paula Eduardo, Univ. of Sao Paulo School of Dentistry (Brazil) and Univ. Cidade de Sao Pa (Brazil)
Carlos Eduardo Aun, Univ. of Sao Paulo School of Dentistry (Brazil) and Univ. Cidade de Sao Pa (Brazil)
Luciano W. Ribeiro, Univ. of Sao Paulo School of Dentistry (Brazil) and City Univ. of Sao Paulo (Brazil)
Jeffrey M. Coil, Univ. of British Columbia School of Dentistry (Canada)


Published in SPIE Proceedings Vol. 3593:
Lasers in Dentistry V
John D. B. Featherstone; Peter Rechmann; Daniel Fried, Editor(s)

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