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Effect of Laser-activated Irrigation of 1320-NanometerNd:YAG Laser on Sealer Penetration in Curved Root Canals
Cited 35 time in
Web of Science
Cited 40 time in Scopus
- Authors
- Issue Date
- 2012-04
- Publisher
- ELSEVIER
- Citation
- JOURNAL OF ENDODONTICS Vol.38 No.4, pp. 531-535
- Keywords
- 복합학 ; EDTA ; laser-activated irrigation ; NaOCl ; Nd:YAG laser ; sealer penetration
- Abstract
- The purpose of this study was to investigate
the efficacy of laser-activated irrigation (LAI) of
1320-nm neodymium-doped:yttrium-aluminum-garnet
(Nd:YAG) laser on sealer penetration into dentinal
tubules in the presence of 5.25% sodium hypochlorite
(NaOCl) or 17% ethylenediaminetetraacetic acid
(EDTA). Methods: The curved root canals (>20 ) from
63 extracted human molars (negative control, n = 3)
were prepared to size #30.06 with NaOCl irrigation.
Teeth were divided into 4 groups (n = 15) as follows:
group N, NaOCl irrigation without LAI; group E, EDTA
irrigation without LAI; group NL, LAI with NaOCl; group
EL, LAI with EDTA. In all groups, the laser fiber was inserted
and withdrawn 4 times for 5 seconds each. Teeth
were obturated with gutta-percha and fluorescentlabeled
sealer. Transverse sections at 2 and 5 mm
from root apex were examined with confocal laser scanning
microscopy, and the percentage of sealer penetration
into dentinal tubules was measured. Results:
Groups E, NL, and EL showed higher percentage of
sealer penetration than group N (P < .05). With NaOCl
as irrigant, LAI (group NL) resulted in significantly higher
amount of sealer penetration than nonactivated group
(group N) in both levels (P < .05). However, with
EDTA, no significant differences in sealer penetration
were observed between the laser-activated group
(group EL) and its nonactivated counterpart (group E)
in both levels (P > .05). Conclusions: The 1320-nm
Nd:YAG laser activation with either NaOCl or EDTA
was much better than NaOCl irrigation alone and as
effective as EDTA final flush for sealer penetration into
dentinal tubules. Additional use of laser with EDTA did
not improve the quality of obturation in the curved
canals.
- ISSN
- 0099-2399
- Language
- English
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