A Comparative Study on the Effects of Three Types of Laser Irradiation at the Apical Stop and Apical Leakage after Obturation

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

doi:10.1089/clm.1999.17.261

Cited by 15 publications

(6 citation statements)

References 29 publications

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“…Laser technology has been considered a breakthrough in medicine and in dentistry. It has been used in different fields of dentistry [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], such as oral surgery [6][7][8][9][10], endodontics [11,12], periodontology [13][14][15][16], restorative dentistry [17,18], among others. Lasers can be classified as surgical (high power) and non-surgical (low power) for therapeutic purposes.…”

Section: Introductionmentioning

confidence: 99%

Effect of low‐power laser irradiation on cell growth and procollagen synthesis of cultured fibroblasts

et al. 2002

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Section: Introductionmentioning

confidence: 99%

Effect of low‐power laser irradiation on cell growth and procollagen synthesis of cultured fibroblasts

et al. 2002

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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%

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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“…Differences in power settings do not appear to result in significant differences in efficacy for removing the smear layer [7, 11, 12]. Although Er:YAG laser irradiation is reported to be effective for removing debris and the smear layer [6, 7], a better apical seal is not necessarily achieved [13, 14]. …”

Section: Introductionmentioning

confidence: 99%

Investigation of Coronal Leakage of Root Fillings after Smear Layer Removal with EDTA or Er,Cr:YSGG Laser through Capillary Flow Porometry

Michiels

Vergauwen

Mavridou

et al. 2014

International Journal of Dentistry

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No studies have been performed evaluating the marginal seal of root fillings after direct exposure of root canal (RC) walls to Er,Cr:YSGG laser irradiation. Therefore, 75 root filled teeth (5 × 15–cold lateral condensation) were analyzed for through-and-through leakage (TTL) using capillary flow porometry (CFP). The cleaning protocol determined the experimental groups: (1) irrigation with NaOCl 2.5% and EDTA 17% or standard protocol (SP), (2) SP + Er,Cr:YSGG lasing (dried RC), (3) NaOCl 2.5% + Er,Cr:YSGG lasing (dried RC), (4) SP + Er,Cr:YSGG lasing (wet RC), and (5) NaOCl 2.5% + Er,Cr:YSGG lasing (wet RC). Groups 6 to 10 consisted of the same filled teeth with resected apices. Resection was performed after the first CFP measurement. CFP was used to assess minimum, mean flow, and maximum pore diameters after 48 h. Statistics were performed using nonparametric tests (P > 0.05). Additional three roots per group were submitted to SEM of the RC walls. TTL was observed in all groups without statistically significant differences between the different groups for minimum, mean, and maximum pore diameter (P > 0.05). In this study, the use of EDTA and/or Er,Cr:YSGG laser did not reduce through-and-through leakage in nonresected and resected roots.

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A Comparative Study on the Effects of Three Types of Laser Irradiation at the Apical Stop and Apical Leakage after Obturation

Abstract: These results suggest that pulsed Nd:YAG laser irradiation with black ink at the apical stop is useful for the reduction of apical leakage after obturation.

Cited by 15 publications

References 29 publications

Effect of low‐power laser irradiation on cell growth and procollagen synthesis of cultured fibroblasts

Effect of low‐power laser irradiation on cell growth and procollagen synthesis of cultured fibroblasts

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 Er,Cr:YSGG Laser through Capillary Flow Porometry

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