Effects of pulsed Nd:YAG laser irradiation on smear layer at the apical stop and apical leakage after obturation

Goya, Claudia; Yamazaki, Reimi; Tomita, Yasuo; Kimura, Yuichi; Matsumoto, Koukichi

doi:10.1046/j.1365-2591.2000.00300.x

Cited by 46 publications

(37 citation statements)

References 27 publications

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“…15 Laser has changeable parameters, so different results can be gained. [46][47][48] Power is one of those parameters. According to the study by Takeda et al the power of 1/2 W is adequate for clearing the smear layer, 11,49,50 moreover, the power of 1/2 W is adequate for disinfecting the canal.…”

Section: Discussionmentioning

confidence: 99%

“…But it should be considered that due to higher absorption of Er:YAG laser's energy by water in comparison with other lasers such as Nd:YAG and CO 2 , the possibility of increasing temperature is minimum. 48 Water or air sprays are some of the efficient factors in preventing thermal damage. [49][50][51] The study by Theodoro et al showed that applying laser for 30 seconds with water spray can decrease temperature (-2.2 ± 2.5°C).…”

Section: Anti-bacterial Effect Of Er:yag Laser On Enterococcus Faecalismentioning

confidence: 99%

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The Effect of Er:YAG Laser on Entroccocus faecalis Bacterium in the Pulpectomy of Anterior Primary Teeth

et al. 2017

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Introduction: Successful root canal therapy depends on the complete elimination of microorganisms such as Entroccocus faecalis, which is impossible to achieve with the traditional methods. Lasers are recently introduced as a new method to solve the problem. The present study is planned and performed to examining the antibacterial effect of Er: YAG laser. Methods: Sixty extracted anterior primary teeth were prepared and sterilized. E. faecalis bacterium was cultured in canals. Samples were randomly divided into two groups. The first group was disinfected by NaOCl 5/25% and Er: YAG laser and the second group just by NaOCl 5/25%. Samples of canal contents were cultured and colony counts were calculated. The results were analyzed statistically by SPSS software and Mann Whitney test. Results: There was no significant difference between colony counts in both groups (P = 0.142). But the number of colonies in the first group was lower than in the second group. Conclusion: Although, Er: YAG laser cannot completely eliminate E. faecalis bacterium, its simultaneous use with NaOCl decreases E. faecalis.

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Section: Discussionmentioning

confidence: 99%

Section: Anti-bacterial Effect Of Er:yag Laser On Enterococcus Faecalismentioning

confidence: 99%

The Effect of Er:YAG Laser on Entroccocus faecalis Bacterium in the Pulpectomy of Anterior Primary Teeth

et al. 2017

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“…[1][2][3][4][5][6][7] In view of ''dentin melting'' 8 and ''reduction of the permeability of dentin'', 3 a number of investigators have attempted to improve the quality of the apical seal and thus to reduce apical leakage after apical filling. [9][10][11][12][13][14][15] It is clear from these studies that morphologic changes after Nd:YAG laser irradiation can influence the marginal sealing of the root-canal obturation. Data evaluating coronal leakage of root fillings after laser irradiation of the root-canal walls remain scarce.…”

mentioning

confidence: 99%

Investigation of Coronal Leakage of Root Fillings After Smear-Layer Removal with EDTA or Nd:YAG Lasing Through Capillary-Flow Porometry

Michiels

Vergauwen

Mavridou

et al. 2010

Photomedicine and Laser Surgery

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Objective: This study investigates the effects of Nd:YAG laser irradiation combined with different irrigation protocols on the marginal seal of root fillings. Background data: Limited information exists regarding the effects of morphologic changes to root canal (RC) walls after Nd:YAG laser irradiation after smear-layer removal with EDTA on the sealing ability of root fillings. Methods: The 75 root-filled teeth (5Â15 teeth) were analyzed for through-and-through leakage by using capillary flow porometry (CFP). The RC cleaning procedure determined the assignment to a group: (1) irrigation with NaOCl 2.5% and EDTA 17% or standard protocol (SP), (2) SP þ Nd:YAG lasing (dried RC), (3) NaOCl 2.5% þ Nd:YAG lasing (dried RC), (4) SP þ Nd:YAG lasing (wet RC), or (5) NaOCl 2.5% þ Nd:YAG lasing (wet RC). Groups 1r to 5r consisted of the same filled teeth with resected apices up to the most apical point of the preparation length. Resection was performed after the first CFP measurement. Roots were filled with cold lateral condensation. CFP was used to assess minimum, mean flow and maximum pore diameters after 48 h, and immediately after these measurements, including root resection. Statistics were performed by using nonparametric tests ( p > 0.05). An additional three roots per group were submitted to SEM of the RC wall. Results: Through-and-through leakage was observed in all groups. Statistically significant differences were observed in maximum pore diameter: 1r > 3r, and 1r > 5r; in mean flow pore diameter: 1r > 2r, 2r < 4r ( p < 0.05). Typical Nd:YAG glazing effects were observed when the smear layer was present and exposed to the laser fiber (i.e., in the groups without use of EDTA) or when the fiber tip made direct contact with a smear-layer free RC wall. Conclusions: The reduction in through-and-through leakage is significantly higher with the Nd:YAG laser as smear-layer modifier than when smear layer is removed with an EDTA rinsing solution.

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“…GOYA et al 27 , em 2000, tiveram como objetivo avaliar a remoção da "smear layer" pelo laser Nd:YAG, quando da utilização de tinta nanquim ou não, e a infiltração apical após a obturação do sistema de canais radiculares.…”

Section: Revisão De Literatura 21unclassified

“…Este resultado está de acordo com o trabalho de GOYA et al 27 , que concluíram que a irradiação das paredes dos canais radiculares com laser Nd:YAG, principalmente com a associação à tinta nanquim, reduziu de forma significativa a infiltração apical de canais obturados. Os autores concluíram ainda, que a parede dos canais irradiada pelo laser, apresentava-se sem "smear layer", evidenciando superfícies com túbulos dentinários abertos e em outra parte a "smear layer" se apresentava derretida e aderida à dentina, obliterando os túbulos dentinários.…”

Section: Grupounclassified

Infiltração apical em obturações de canais realizadas com dois tipos de cimento após aplicação do laser ND:YAG ou solução de EDTA nas paredes do canal radicular

Bassili¹

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Effects of pulsed Nd:YAG laser irradiation on smear layer at the apical stop and apical leakage after obturation

Abstract: These results suggest that pulsed Nd:YAG laser irradiation with black ink increases the removal of smear layer compared with that without black ink, and reduces apical leakage after obturation significantly.

Cited by 46 publications

References 27 publications

The Effect of Er:YAG Laser on Entroccocus faecalis Bacterium in the Pulpectomy of Anterior Primary Teeth

The Effect of Er:YAG Laser on Entroccocus faecalis Bacterium in the Pulpectomy of Anterior Primary Teeth

Investigation of Coronal Leakage of Root Fillings After Smear-Layer Removal with EDTA or Nd:YAG Lasing Through Capillary-Flow Porometry

Infiltração apical em obturações de canais realizadas com dois tipos de cimento após aplicação do laser ND:YAG ou solução de EDTA nas paredes do canal radicular

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