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Influence of lasing parameters on the cleaning efficacy of laser-activated irrigation with pulsed erbium lasers

Maarten Meire UGent, SOPHIE HAVELAERTS and Roeland De Moor UGent (2016) LASERS IN MEDICAL SCIENCE. 31(4). p.653-658
abstract
Laser-activated irrigation (LAI) using erbium lasers is an irrigant agitation technique with great potential for improved cleaning of the root canal system, as shown in many in vitro studies. However, lasing parameters for LAI vary considerably and their influence remains unclear. Therefore, this study sought to investigate the influence of pulse energy, pulse frequency, pulse length, irradiation time and fibre tip shape, position and diameter on the cleaning efficacy of LAI. Transparent resin blocks containing standardized root canals (apical diameter of 0.4 mm, 6 % taper, 15 mm long, with a coronal reservoir) were used as the test model. A standardized groove in the apical part of each canal wall was packed with stained dentin debris. The canals were filled with irrigant, which was activated by an erbium: yttrium aluminium garnet (Er:YAG) laser (2940 nm, AT Fidelis, Fotona, Ljubljana, Slovenia). In each experiment, one laser parameter was varied, while the others remained constant. In this way, the influence of pulse energy (10-40 mJ), pulse length (50-1000 mu s), frequency (5-30 Hz), irradiation time (5-40 s) and fibre tip shape (flat or conical), position (pulp chamber, canal entrance, next to groove) and diameter (300-600 mu m) was determined by treating 20 canals per parameter. The amount of debris remaining in the groove after each LAI procedure was scored and compared among the different treatments. The parameters significantly (P < 0.05, Kruskal-Wallis) affecting debris removal from the groove were fibre tip position, pulse length, pulse energy, irradiation time and frequency. Fibre tip shape and diameter had no significant influence on the cleaning efficacy.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Laser-activated irrigation, Root canal irrigation, Erbium laser, Pulse length, Pulse energy, Fibre tip shape, INDUCED EXPLOSIVE VAPOR, REMOVING SMEAR LAYER, ROOT-CANAL IRRIGANTS, GARNET LASER, ER-YAG, DEBRIS, VISUALIZATION, FIBER, FLOW, ABLATION
journal title
LASERS IN MEDICAL SCIENCE
Lasers Med. Sci.
volume
31
issue
4
pages
653 - 658
Web of Science type
Article
Web of Science id
000375328200008
JCR category
SURGERY
JCR impact factor
2.299 (2016)
JCR rank
67/196 (2016)
JCR quartile
2 (2016)
ISSN
0268-8921
DOI
10.1007/s10103-016-1892-0
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
7239571
handle
http://hdl.handle.net/1854/LU-7239571
date created
2016-05-31 16:06:06
date last changed
2016-12-19 15:45:26
@article{7239571,
  abstract     = {Laser-activated irrigation (LAI) using erbium lasers is an irrigant agitation technique with great potential for improved cleaning of the root canal system, as shown in many in vitro studies. However, lasing parameters for LAI vary considerably and their influence remains unclear. Therefore, this study sought to investigate the influence of pulse energy, pulse frequency, pulse length, irradiation time and fibre tip shape, position and diameter on the cleaning efficacy of LAI. Transparent resin blocks containing standardized root canals (apical diameter of 0.4 mm, 6 \% taper, 15 mm long, with a coronal reservoir) were used as the test model. A standardized groove in the apical part of each canal wall was packed with stained dentin debris. The canals were filled with irrigant, which was activated by an erbium: yttrium aluminium garnet (Er:YAG) laser (2940 nm, AT Fidelis, Fotona, Ljubljana, Slovenia). In each experiment, one laser parameter was varied, while the others remained constant. In this way, the influence of pulse energy (10-40 mJ), pulse length (50-1000 mu s), frequency (5-30 Hz), irradiation time (5-40 s) and fibre tip shape (flat or conical), position (pulp chamber, canal entrance, next to groove) and diameter (300-600 mu m) was determined by treating 20 canals per parameter. The amount of debris remaining in the groove after each LAI procedure was scored and compared among the different treatments. The parameters significantly (P {\textlangle} 0.05, Kruskal-Wallis) affecting debris removal from the groove were fibre tip position, pulse length, pulse energy, irradiation time and frequency. Fibre tip shape and diameter had no significant influence on the cleaning efficacy.},
  author       = {Meire, Maarten and HAVELAERTS, SOPHIE and De Moor, Roeland},
  issn         = {0268-8921},
  journal      = {LASERS IN MEDICAL SCIENCE},
  keyword      = {Laser-activated irrigation,Root canal irrigation,Erbium laser,Pulse length,Pulse energy,Fibre tip shape,INDUCED EXPLOSIVE VAPOR,REMOVING SMEAR LAYER,ROOT-CANAL IRRIGANTS,GARNET LASER,ER-YAG,DEBRIS,VISUALIZATION,FIBER,FLOW,ABLATION},
  language     = {eng},
  number       = {4},
  pages        = {653--658},
  title        = {Influence of lasing parameters on the cleaning efficacy of laser-activated irrigation with pulsed erbium lasers},
  url          = {http://dx.doi.org/10.1007/s10103-016-1892-0},
  volume       = {31},
  year         = {2016},
}

Chicago
Meire, Maarten, SOPHIE HAVELAERTS, and Roeland De Moor. 2016. “Influence of Lasing Parameters on the Cleaning Efficacy of Laser-activated Irrigation with Pulsed Erbium Lasers.” Lasers in Medical Science 31 (4): 653–658.
APA
Meire, Maarten, HAVELAERTS, S., & De Moor, R. (2016). Influence of lasing parameters on the cleaning efficacy of laser-activated irrigation with pulsed erbium lasers. LASERS IN MEDICAL SCIENCE, 31(4), 653–658.
Vancouver
1.
Meire M, HAVELAERTS S, De Moor R. Influence of lasing parameters on the cleaning efficacy of laser-activated irrigation with pulsed erbium lasers. LASERS IN MEDICAL SCIENCE. 2016;31(4):653–8.
MLA
Meire, Maarten, SOPHIE HAVELAERTS, and Roeland De Moor. “Influence of Lasing Parameters on the Cleaning Efficacy of Laser-activated Irrigation with Pulsed Erbium Lasers.” LASERS IN MEDICAL SCIENCE 31.4 (2016): 653–658. Print.