Safety irradiation parameters of Nd:YAP laser beam for endodontic treatments : an in vitro studyReportar como inadecuado

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(2016)BIOMED RESEARCH INTERNATIONAL. Mark abstract Objective: Nd:YAP laser has several potentialities of clinical applications in endodontics. The aim of our study is to determine the safety range of irradiation parameters during endodontic application of Nd:YAP laser that can be used without damaging and overheating the periodontal tissue.Material and Methods: Twenty-seven caries-free single-rooted extracted human teeth were used. Crowns were sectioned to obtain 11mmroot canal length. Temperature increases at root surfaces were measured by a thermocouple during Nd:YAP laser irradiation of root canals at different energy densities. Canal irradiation was accomplished with a circular and retrograde movement from the apex until the cervical part of the canal during 10 seconds with an axial speed of 1 mm/s. Each irradiation was done in a canal irrigated continuously with 2.25% NaOCl solution.Results: Periodontal temperature increase depends on the value of energy density. Means and standard deviations of temperature increases at root surfaces were below 10 degrees C (safe threshold level) when the average energy densities delivered per second were equal to or below 4981 J/cm(2) and 9554 J/cm(2), respectively, for irradiations using a fiber diameter of 320 mu m and 200 mu m.Conclusions: Within the limitations of this study and under specific irradiation conditions, Nd:YAP laser beam may be considered harmless for periodontal tissues during endodontic applications.

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Autor: Amaury Namour, Sabine Geerts, Toni Zeinoun, Roeland De Moor and Samir Namour



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