Effect of Nd:YAG laser irradiation on the apical leakage of obturated root canals: an electrochemical study

Park, D. S.; Lee, H. J.; Yoo, Hyun-Mi; Oh, Tong In

doi:10.1046/j.1365-2591.2001.00397.x

Cited by 35 publications

(21 citation statements)

References 16 publications

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“…[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. Data evaluating coronal leakage of root fillings following laser irradiation of the root canal walls are limited.…”

mentioning

confidence: 99%

“…Data evaluating coronal leakage of root fillings following laser irradiation of the root canal walls are limited. 12 In order to prevent the ingress of new pathogens from the oral cavity and maintain the success of the endodontic procedure, adequate three-dimensional obturation and coronal seal, after meticulous cleaning and shaping of the root canal space, are required. 17,18 In achieving tightly sealed threedimensional fillings, the hybrid gutta-percha condensation (thermocompaction) is superior to cold lateral condensation (CLC) with respect to apical leakage.…”

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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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confidence: 99%

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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“…The copper wire as an experimental electrode was fixed in the canal and extended to the outside of the bottle cap. The stainless steel wire as a standard electrode was located at the center of the bottle as like in Park et al' s study 20) (Figure 1). A 0.9% NaCl solution as an electrolyte was placed in the bottle until the apical 8 ㎜ of the roots was covered.…”

Section: ⅱ Materials and Methodsmentioning

confidence: 99%

The effect of MTAD on the apical leakage of obturated root canals: an electrochemical study

Park

2006

J Korean Acad Conserv Dent

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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%

“…Data evaluating coronal leakage of root fillings after laser irradiation of the root-canal walls remain scarce. 11,16 To prevent the ingress of new pathogens from the oral cavity and to maintain the success of the endodontic procedure, an adequate three-dimensional obturation and coronal seal, after meticulous cleaning and shaping of the root-canal space, are required. 17,18 The removal of the smear layer plays an important role in this success, with the use of EDTA as a determining parameter.…”

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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Effect of Nd:YAG laser irradiation on the apical leakage of obturated root canals: an electrochemical study

Abstract: Laser irradiation following root canal preparation reduced apical leakage following root canal obturation.

Cited by 35 publications

References 16 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

The effect of MTAD on the apical leakage of obturated root canals: an electrochemical study

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

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