Evaluation of the Bactericidal Effect of Er,Cr:YSGG, and Nd:YAG Lasers in Experimentally Infected Root Canals

Wang, Qianqian; Zhang, Chengfei; Yin, Xing-zhe

doi:10.1016/j.joen.2007.03.017

Cited by 89 publications

(63 citation statements)

References 34 publications

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“…In the present study, there was about a 99.98 % reduction of E. faecalis viability on the root canal walls after being treated with 5 ml 52.5 g l 21 NaOCl for 60 s, which was consistent with a previous study (Wang et al, 2007). However, E. faecalis located at 500 mm inside dentinal tubules could only be reduced by approximately 91.99 %.…”

Section: Discussionsupporting

confidence: 93%

Bactericidal effect of Er:YAG laser combined with sodium hypochlorite irrigation against Enterococcus faecalis deep inside dentinal tubules in experimentally infected root canals

Cheng

Chen

Qiu

et al. 2016

Journal of Medical Microbiology

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This study evaluated the bactericidal effect of Er:YAG laser radiation combined with sodium hypochlorite (NaOCl) irrigation in the treatment of Enterococcus faecalis deep inside dentinal tubules. The Er:YAG laser was activated, respectively, at 0.3, 0.5 and 1.0 W for either 20 or 30 s; 52.5 g l 21 NaOCl and normal saline were used for the control groups. Root canals before and after treatments were examined using scanning electron microscopy (SEM). Bacterial reductions both on the root canal walls and at 100, 200, 300, 400 and 500 mm inside the dentinal tubules were analysed using a one-way analysis of variance. SEM results showed that the Er:YAG laser combined with NaOCl disinfected the dentinal tubules from 200 to over 500 mm depth as irradiation power and time increased. This combination killed significantly more bacteria than both the negative control group at each level tested and the positive control group at 300, 400 and 500 mm inside the dentinal tubules. It reached 100 % in all experimental groups, both on the root canal walls and at 100 and 200 mm inside the dentinal tubules. However, at 300, 400 and 500 mm inside the dentinal tubules, only the groups treated with 0.5 and 1.0 W for 30s exhibited no bacterial growth. Of the two groups in which no bacteria were detected at all tested depths, Er:YAG laser irradiation at 0.5 W for 30 s combined with NaOCl irrigation was preferable because of the lower emission power and shorter irradiation time, and may serve as a new option for effective root canal disinfection.

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Section: Discussionsupporting

confidence: 93%

Bactericidal effect of Er:YAG laser combined with sodium hypochlorite irrigation against Enterococcus faecalis deep inside dentinal tubules in experimentally infected root canals

Cheng

Chen

Qiu

et al. 2016

Journal of Medical Microbiology

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“…[4][5][6] Lasers can be used to activate photosensitizers that have been taken up by bacteria: a mechanism called light-or photoactivated disinfection, 7 or through activating the irrigation solution by the transfer of pulsed energy. 8,9 The Er:YAG laser of 2940 nm wavelength has the highest absorption in water and a high affinity for hydroxyapatite.…”

mentioning

confidence: 99%

Comparison of the Antibacterial Effect and Smear Layer Removal Using Photon-Initiated Photoacoustic Streaming Aided Irrigation Versus a Conventional Irrigation in Single-Rooted Canals: AnIn VitroStudy

Zhu

Yin²,

Chang

et al. 2013

Photomedicine and Laser Surgery

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Objective: The Er:YAG laser with photon-induced photoacoustic streaming (PIPS) technique was reported to be effective in root canal disinfection. This study attempted to further investigate the antibacterial efficacy and smear layer removal ability of PIPS in comparison with conventional syringe irrigation in vitro. Methods: For antibacterial analysis, 48 single-rooted human teeth were prepared and inoculated with Enterococcus faecalis, and then divided into six groups of eight roots each. The colony-forming units (CFUs) per milliliter were determined after infection as the baseline. Then, the teeth were subjected to either PIPS plus 3% sodium hypochlorite (PIPS + NaOCl) or conventional syringe irrigation with 0.9% saline, 3% NaOCl, 17% ethylenediaminetetraacetic acid (EDTA), 0.2% chlorhexidine gluconate (CHX), or 3% NaOCl alternating with 17% EDTA. The reduction of CFUs in the individual group was determined. Additionally, scanning electron microscopy (SEM) examination of the canal walls for E. faecalis colonization was performed. For comparing the smear removal efficacy, another 48 single-rooted teeth, assigned to different groups as mentioned, were irrigated after mechanical instrumentation. The presence of a smear layer at different levels of the root canal was scored by SEM examination. Results: No significant differences were found in CFU reduction. No bacteria could be observed by SEM in the NaOCl, NaOCl + EDTA, and PIPS + NaOCl groups. The scores of smear layer of the NaOCl + EDTA and PIPS + NaOCl groups were significantly lower than those of the other groups in the coronal and middle third of the root canal. None of the methods can effectively remove smear layer in the apical third. Conclusions: PIPS system supplied with NaOCl and conventional syringe irrigation with NaOCl + EDTA are comparable in their ability to remove E. faecalis and smear layer in single-rooted canals.

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“…There were another options for application with Er:YAG combined with Nd:YAG [in Step 5 plus Root-end sterilization with Nd:YAG] or Diode Lasers in apicoectomy [39,40]. The reason for application Nd:YAG laser in root-end sterilization is that the effects of Nd:YAG laser on the permeability of dentine following apicoectomy appear to reduce the permeability of resected roots [41].…”

Section: Discussionmentioning

confidence: 99%

Multiple Applications with Er:YAG Laser in Apicoectomy - A Clinical Case Report

Yu¹

2017

Dentistry

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The setting was 50 mJ/10 Hz with 100% of water for full mouth laser scaling and then ultrasonic scaling tip was used for supragingival scaling. In addition, another laser setting was applied at 50 mJ/30Hz with 100% of water for subgingival sterilization and then ultrasonic round tip was used for subgingival curettage [7,8]. Step 2. Vertical soft tissue incisionThe setting was 100 mJ/40 Hz with 100% of water for incision [in vestibular near apex of #21] (Figure 3). Step 3. Granulation tissues ablationThe setting was 400 mJ/15Hz with 100% of water. Granulation tissues were ablation thoroughly (Figures 4 and 5).

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Evaluation of the Bactericidal Effect of Er,Cr:YSGG, and Nd:YAG Lasers in Experimentally Infected Root Canals

Cited by 89 publications

References 34 publications

Bactericidal effect of Er:YAG laser combined with sodium hypochlorite irrigation against Enterococcus faecalis deep inside dentinal tubules in experimentally infected root canals

Bactericidal effect of Er:YAG laser combined with sodium hypochlorite irrigation against Enterococcus faecalis deep inside dentinal tubules in experimentally infected root canals

Comparison of the Antibacterial Effect and Smear Layer Removal Using Photon-Initiated Photoacoustic Streaming Aided Irrigation Versus a Conventional Irrigation in Single-Rooted Canals: AnIn VitroStudy

Multiple Applications with Er:YAG Laser in Apicoectomy - A Clinical Case Report

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