Resumo

CABRALES SALGADO, R.; YAMAZAKI-ARASAKI, A.; MONICA KLEINE, B.  e  PROKOPOWITSCH, I.. Study of the dentin root permeability variation using ^99mTc isotopes, after the application of high intensity laser. Av Odontoestomatol [online]. 2012, vol.28, n.1, pp.39-46. ISSN 2340-3152.

Objective: The objective of this study was to evaluate changes in root dentin permeability of human teeth after chemical-surgical preparation, and laser irradiation with Er: YAG, Nd: YAG, through the use of the radioisotope technetium-99m (^99mTc) free. Materials and methods: thirty Channels palatal roots of human maxillary first premolars were prepared and divided randomly into three experimental groups: G1 (control), G2 (laser irradiation with Er: YAG) and G3 (Nd laser irradiation : YAG). in the samples were deposited ^99mTc free inside the root canal, enough to fill and placed in test tubes containing 1 ml of saline. After 1 hour, the account of the radioactive isotope (^99mTc) was performed. Results: After statistical analysis (ANOVA) found that the best results in terms of decreased permeability were found in Group 3, followed by Group 2 and Group 1. Conclusion: We conclude that irradiation with Nd: YAG caused a significant decrease in the permeability of root canal dentin. Laser Er: YAG and control in relation to the dentin permeability of root canal walls showed no statistically significant differences at 5%.

Palavras-chave : Endodontic; root dentin permeability; Er: YAG; Nd: YAG; radioisotope technetium-99m (MeSH Database).

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