Q-switched versus free-running Er:YAG laser efficacy on the root canal walls of human teeth: A SEM study

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

dc.contributor.author	Khabbaz, MG	en
dc.contributor.author	Makropoulou, MI	en
dc.contributor.author	Serafetinides, AA	en
dc.contributor.author	Papadopoulos, D	en
dc.contributor.author	Papagiakoumou, E	en
dc.date.accessioned	2014-03-01T01:21:16Z
dc.date.available	2014-03-01T01:21:16Z
dc.date.issued	2004	en
dc.identifier.issn	0099-2399	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16178
dc.subject	Root Canal	en
dc.subject	Yag Laser	en
dc.subject.classification	Dentistry, Oral Surgery & Medicine	en
dc.subject.other	article	en
dc.subject.other	controlled study	en
dc.subject.other	dental surgery	en
dc.subject.other	dentin	en
dc.subject.other	endodontics	en
dc.subject.other	erbium YAG laser	en
dc.subject.other	human	en
dc.subject.other	human tissue	en
dc.subject.other	scanning electron microscopy	en
dc.subject.other	tooth root canal	en
dc.subject.other	Aluminum Silicates	en
dc.subject.other	Dental Pulp Cavity	en
dc.subject.other	Dentin	en
dc.subject.other	Equipment Design	en
dc.subject.other	Erbium	en
dc.subject.other	Humans	en
dc.subject.other	Laser Surgery	en
dc.subject.other	Lasers	en
dc.subject.other	Microscopy, Electron, Scanning	en
dc.subject.other	Root Canal Preparation	en
dc.subject.other	Smear Layer	en
dc.subject.other	Yttrium	en
dc.title	Q-switched versus free-running Er:YAG laser efficacy on the root canal walls of human teeth: A SEM study	en
heal.type	journalArticle	en
heal.identifier.primary	10.1097/01.DON.0000121612.74269.0D	en
heal.identifier.secondary	http://dx.doi.org/10.1097/01.DON.0000121612.74269.0D	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Twenty-one teeth with one root canal were prepared by the step-back technique, divided into three groups, and split longitudinally. Group A served as a control. In group B, 20 to 150 pulses of 100 mus, 30 to 70 mJ per pulse at 1 to 4 Hz from a free-running Er:YAG laser were applied to the root-canal dentin. In group C, the Q-switched Er:YAG laser, with the same energy parameters and a 190-ns pulse duration was used. Scanning electron microscopy examination revealed that control specimens had debris and smear layer obscuring the dentinal tubules at all levels in the canals without crack formation. Both groups of laser-treated dentin were clean with opened dentinal tubules except around the lased area in which there was an intact smear layer. Cracks were observed in both laser groups with higher frequency in group C. In group B, craters with different depth levels at the root canal walls were produced and the energy apparently was distributed equally, because craters were well-shaped. In contrast, the ablation efficiency in group C was questionable with the parameters used in this study. Consequently, suitable parameters of the free-running Er:YAG laser must be found before its careful use as an adjunct in endodontic therapy.	en
heal.publisher	LIPPINCOTT WILLIAMS & WILKINS	en
heal.journalName	Journal of Endodontics	en
dc.identifier.doi	10.1097/01.DON.0000121612.74269.0D	en
dc.identifier.isi	ISI:000222923700006	en
dc.identifier.volume	30	en
dc.identifier.issue	8	en
dc.identifier.spage	585	en
dc.identifier.epage	588	en