Morphologic Changes and Removal of Debris on Apical Dentin Surfaces after Nd:YAG Laser and Diode Laser Irradiation

Moura-Netto, Cacio; Moura, Abílio Albuquerque Maranhão de; Davidowicz, Harry; Aun, Carlos Eduardo; Antonio, Miriam Porcel do Santos

doi:10.1089/pho.2007.2180

Cited by 25 publications

(25 citation statements)

References 11 publications

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“…These findings are not to be confused with the study of de Moura-Netto et al 16 in which Nd:YAG lasing improved apical marginal sealing in EDTA-T rinsed canals, as roots with open apices of an ISO size 40 were evaluated. All studies mentioned so far, however, attribute lower leakage rates to the more evident changes in dentin walls with use of the Nd:YAG, as stated by de Mouro-Netto et al 8 The findings of the present study are also in line with those of Gurbuz et al, 32 which reported no significant differences in root canal wall cleanliness between root canals rinsed with EDTA and those lased with the Nd:YAG laser. Furthermore, the latter study supported that EDTA rinsing is not efficient for cleaning the apical third.…”

Section: Meire Et Alsupporting

confidence: 91%

“…1 A variety of studies have shown that direct Nd:YAG laser irradiation on dentin surfaces produces melting and recrystallization which, in turn, causes a reduction in dentin permeability. [2][3][4][5][6][7][8] In view of ''dentin melting'' 9 and ''reduction of the permeability of dentin'' 4 a number of investigators have attempted to improve the quality of the apical seal and thus reduce apical leakage following apical filling. [10][11][12][13][14][15][16] Apparently, morphological changes following Nd:YAG laser irradiation can influence the marginal sealing of the root canal obturations.…”

mentioning

confidence: 99%

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Longitudinal Study on the Influence of Nd:YAG Laser Irradiation on Microleakage Associated with Two Filling Techniques

Meire

Mavridou²,

Dewilde³

et al. 2009

Photomedicine and Laser Surgery

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Objective: This study investigates the effects of Nd:YAG laser irradiation on apical and coronal seals, when used prior to two root canal filling techniques. Background Data: Limited information exists regarding the effects of morphologic changes to dentin walls following Nd:YAG laser irradiation on the sealing ability of root fillings. Methods: Two hundred forty teeth were analyzed by observing coronal and apical leakage of Indian ink (DL), and 60 were analyzed for through-and-through leakage using the fluid transport model (FTM). The Nd:YAG laser parameters were 1.5 W, 100 mJ, and 15 Hz (four times for 5 s at 20 s intervals). Each group consisted of a lased and a nonlased subgroup: each subgroup had root fills done by either cold lateral condensation (CLC) or hybrid condensation (HC). Leakage was assessed after 48 h, and then at 1, 6, and 12 months. The DL group was divided into four groups of 15 teeth for each evaluation point. Through-and-through leakage (L in microliters= day) was measured for 48 h under a pressure of 1.2 atm using FTM, and recorded as L ¼ 0 (L1), 0 < L 10 (L2), or L > 10 (L3). Results: Apical and coronal dye leakage was observed in all groups. Significant differences ( p < 0.05) in apical leakage were found between HC and HC þ Nd after 1, 6, and 12 months, and between CLC and CLC þ Nd at 6 and 12 months. No significant differences were found between laser-irradiated and non-laserirradiated groups with FTM. Conclusion: Pulsed Nd:YAG laser irradiation following root canal preparation may reduce apical leakage in association with hybrid gutta-percha condensation.

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Section: Meire Et Alsupporting

confidence: 91%

mentioning

confidence: 99%

Longitudinal Study on the Influence of Nd:YAG Laser Irradiation on Microleakage Associated with Two Filling Techniques

Meire

Mavridou²,

Dewilde³

et al. 2009

Photomedicine and Laser Surgery

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“…[1][2][3][4][5][6][7]13 These changes are confirmed on the SEM images in this study in Group 3 with Nd:YAG lasing, after the NaOCl supported root-canal preparation (Fig. 3a).…”

Section: S-46supporting

confidence: 75%

“…An abundant number of studies have shown that direct Nd:YAG laser irradiation on dentin surfaces produces melting and recrystallization, which, in turn, causes a reduction in dentin permeability. [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.…”

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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“…[2][3][4][5][6][7] As an adjunct in endodontic treatment, the use of high intensity laser devices has demonstrated significant intracanal disinfection and morphological changes of the dentin surface that interfere with dentin permeability and root canal sealing. 5,6,[8][9][10][11][12][13][14][15][16] The interaction between laser wavelengths and irradiated tissues will assume the level of energy absorbed by the latter and therefore the intensity of tissue alteration. 3,9,11-,15-18 Wavelengths between 800 and 1100 nm (i.e., diode and Nd:YAG lasers) have poor interaction with dental hard tissues like enamel and dentin.…”

Section: Introductionmentioning

confidence: 99%

Adaptation and penetration of resin-based root canal sealers in root canals irradiated with high-intensity lasers

et al. 2015

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Abstract. This research analyzed the quality of resin-based sealer adaptation after intracanal laser irradiation. Extracted teeth (n ¼ 168) were root canal treated and divided into four groups, according to dentin surface treatment: no laser; Nd:YAG laser (1.5 W, 100 mJ, 15 Hz); diode laser (2.5 W in CW), and Er:YAG laser (1 W, 100 mJ, 10 Hz). The teeth were divided into four subgroups according to the sealer used: AH Plus, EndoREZ, Epiphany, and EpiphanySE. For testing the sealing after root canal obturation, the penetration of silver nitrate solution was measured, whereas to evaluate the adaptation and penetration of the sealer into the dentin, environmental scanning electron microscopy (ESEM) was used. The ESEM images were analyzed using a four-grade criteria score by three evaluators. The inter-examiner agreement was confirmed by Kappa test and the scores statistically compared by the Kruskal-Wallis' test (p < 0.05). Both adaptation and sealer penetration in root canals were not affected by the laser irradiation. Nd:YAG and diode laser decreased the tracer penetration for AH Plus, whereas EndoREZ and EpiphanySE performances were affected by Nd:YAG irradiation (p < 0.05). It can be concluded that intracanal laser irradiation can be used as an adjunct in endodontic treatment; however, the use of hydrophilic resin sealers should be avoided when root canals were irradiated with Nd:YAG laser.

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Morphologic Changes and Removal of Debris on Apical Dentin Surfaces after Nd:YAG Laser and Diode Laser Irradiation

Abstract: Both lasers promote morphologic changes and debris removal. These alterations of the dentin surface appeared to be more evident in the Nd:YAG laser group, but the diode laser group showed more uniform changes.

Cited by 25 publications

References 11 publications

Longitudinal Study on the Influence of Nd:YAG Laser Irradiation on Microleakage Associated with Two Filling Techniques

Longitudinal Study on the Influence of Nd:YAG Laser Irradiation on Microleakage Associated with Two Filling Techniques

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

Adaptation and penetration of resin-based root canal sealers in root canals irradiated with high-intensity lasers

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