Dental Caries/therapy; Endodontics; Female; Humans; Male; Root Canal Preparation/instrumentation; Root Canal Preparation/methods; Lasers, Solid-State; Safety; Dental Caries; Root Canal Preparation; Biochemistry, Genetics and Molecular Biology (all); Immunology and Microbiology (all); General Immunology and Microbiology; General Biochemistry, Genetics and Molecular Biology; General Medicine
Abstract :
[en] 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 11 mm root 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°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 μm and 200 μm. 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.
Research Center/Unit :
d‐BRU - Dental Biomaterials Research Unit - ULiège
Disciplines :
Dentistry & oral medicine
Author, co-author :
Namour, Amaury; University of Liège, Belgium > faculté de Médecine > Sciences dentaire
Geerts, Sabine ; Centre Hospitalier Universitaire de Liège - CHU > > Service de dentisterie conservatrice et de pédodontie
Zeinoun, T; Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Lebanese University, Hadath Campus, Beirut, Lebanon
De Moor, R; Department of Operative Dentistry and Endodontology, Ghent Dental Laser Center, Dental School, Ghent University, 9000 Ghent, Belgium
Namour, Samir ; Université de Liège - ULiège > Département des sciences dentaires
Language :
English
Title :
Safety Irradiation Parameters of Nd:YAP Laser Beam for Endodontic Treatments: An In Vitro Study.
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