The influence of the Q-switched and free-running Er:YAG laser beam characteristics on the ablation of root canal dentine

Papagiakoumou, E; Papadopoulos, DN; Khabbaz, MG; Makropoulou, MI; Serafetinides, AA

dc.contributor.author	Papagiakoumou, E	en
dc.contributor.author	Papadopoulos, DN	en
dc.contributor.author	Khabbaz, MG	en
dc.contributor.author	Makropoulou, MI	en
dc.contributor.author	Serafetinides, AA	en
dc.date.accessioned	2014-03-01T01:21:37Z
dc.date.available	2014-03-01T01:21:37Z
dc.date.issued	2004	en
dc.identifier.issn	0169-4332	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16276
dc.subject	Beam profile	en
dc.subject	Dental tissue	en
dc.subject	Q-switched erbium laser	en
dc.subject	SEM images	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Erbium	en
dc.subject.other	Laser ablation	en
dc.subject.other	Laser beams	en
dc.subject.other	Q switched lasers	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Tissue	en
dc.subject.other	Beam profile	en
dc.subject.other	Dental tissues	en
dc.subject.other	Q switched erbium laser	en
dc.subject.other	SEM images	en
dc.subject.other	Surface chemistry	en
dc.title	The influence of the Q-switched and free-running Er:YAG laser beam characteristics on the ablation of root canal dentine	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.apsusc.2004.03.221	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.apsusc.2004.03.221	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Laser based dental treatment is attractive to many researchers. Lasers in the 3 pm region, as the Er:YAG, are suitable especially for endodontic applications. In this study a pulsed free-running and Q-switched laser was used for the ablation experiments of root canal dentine. The laser beam was either directly focused on the dental tissue or delivered to it through an infrared fiber. For different spatial beam distributions, energies, number of pulses and both laser operations the quality characteristics (crater's shape formation, ablation efficiency and surface characteristics modification) were evaluated using scanning electron microscopy (SEM). The craters produced, generally, reflect the relevant beam profile. Inhomogeneous spatial beam profiles and short pulse duration result in cracks formation and lower tissue removal efficiency, while longer pulse durations cause hard dentine fusion. Any beam profile modification, due to laser characteristics variations and the specific delivering system properties, is directly reflected in the ablation crater shape and the tissue removal efficiency. Therefore, the laser parameters, as fluence, pulse repetition rate and number of pulses, have to be carefully adjusted in relation to the desirable result. (C) 2004 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Applied Surface Science	en
dc.identifier.doi	10.1016/j.apsusc.2004.03.221	en
dc.identifier.isi	ISI:000222497700031	en
dc.identifier.volume	233	en
dc.identifier.issue	1-4	en
dc.identifier.spage	234	en
dc.identifier.epage	243	en