In vitro evaluation of the temperature increment at the external root surface after Er,Cr:YSGG laser irradiation of the root canal

Abad-Gallegos, M; Arnabat-Domínguez, José; España-Tost, Antonio Jesús; Berini-Aytés, Leonardo; Gay‐Escoda, Cosme

doi:10.4317/medoral.14.e658

Cited by 19 publications

(15 citation statements)

References 17 publications

(17 reference statements)

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“…Also, the ultrastructural features and chemical changes of dentin depend mainly on the laser parameters such as output power, frequency and application mode, because these parameters are directly related to the increase in temperature (Alfredo, Marchesan, Sousa-Neto, Brugnera-Junior, & Silva-Sousa, 2008;Beer et al, 2017;Faria, Souza-Gabriel, Alfredo, Messias, & Silva-Sousa, 2011;Lopes et al, 2016). Accordingly, previous studies have evaluated the thermal, morphological, and chemical effects in dentin irradiated with high power lasers, to determine parameters for a safe clinical application (Abad-Gallegos, Arnabat-Dominguez, Espana-Tost, Berini-Aytes, & -Escoda, 2009;Alfredo et al, 2008;Beer et al, 2017;Lopes et al, 2016;Marchesan, Brugnera-Junior, Souza-Gabriel, Correa-Silva, & Sousa-Neto, 2008;Yamazaki, Goya, Yu, Kimura, & Matsumoto, 2001).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of chemical and morphological changes in radicular dentin after different final surface treatments

Lopes

Roperto

Akkus

et al. 2018

Microscopy Res & Technique

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The aim of this study was to evaluate the chemical and morphological effects of different lasers as a final surface treatment for endodontic therapy through energy dispersive X‐ray spectroscopy (EDS) and scanning electron microscopy (SEM) respectively. Twenty‐five maxillary canines were selected and instrumented with K3 system. Roots were randomly distributed into five groups (n = 5) according to the surface treatment: GI (distilled water), GII (NaOCl + EDTA), GIII (NaOCl + EDTA + 980 nm diode laser), GIV (NaOCl + EDTA+ 1,064 nm Nd:YAG laser), and GV (NaOCl + EDTA+ 2,780 nm Er, Cr:YSGG laser). Lasers were applied for 20 s and samples were bisected, exposing the treated surface and then subjected to elements quantification by EDS and morphological evaluation by scanning electron microscope (SEM). EDS data were submitted to ANOVA‐two way, and SEM scores were submitted to two‐way Kruskal–Wallis and Dunn's tests. The EDS analysis showed no difference for the chemical elements and Ca/P ratio between groups (p > .05). Statistical analysis showed more intense results for GV and less intense results for GI (p < .05). The GIII showed an amorphous organic matrix surface, while GV provided greater removal of intertubular dentin forming craters, and GIV promoted dentin fusion. The EDS method used in this study was not able to verify any chemical changes in root canal dentin; Nd:YAG, Er, Cr:YSGG, and 980 nm diode laser were capable of modifying the dentin morphology, correlating characteristics features for each one, which are essential clinical knowledge to establish the correct indication for each case. Research Highlights EDS was not able to verify any chemical changes in root canal dentin after 980 nm diode, Nd:YAG and Er;Cr:YSGG laser treatments Nd:YAG, Er, Cr:YSGG, and 980 nm diode laser modified dentin morphology, correlating characteristics features for each one.

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Section: Discussionmentioning

confidence: 99%

Evaluation of chemical and morphological changes in radicular dentin after different final surface treatments

Lopes

Roperto

Akkus

et al. 2018

Microscopy Res & Technique

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“…The advantages of laser irradiation in endodontics include elimination of the dentinal smear layer, opening of dentinal tubules and bactericidal action as a result of the laser-induced heat effect. Unfortunately, however, the temperature increment in the dentinal tissues can produce undesirable effects such as cracks or small fissures upon cooling (3). Using a CO 2 laser reduces dentinal permeability after irradiation and can induce the formation of secondary dentin (4).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the morphology and composition of tooth apices apicectomized using three different ablation techniques

Lustosa-Pereira

Pozza²,

Lobo-da-Cunha³

et al. 2011

Med Oral

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Objectives: To investigate apicectomies performed using burs, a CO 2 laser or an Er:YAG laser and to evaluate the following aspects: morphology of apicectomized surfaces, presence of failures at the dentin/obturation material interface (marginal fit) of the apical portions of the root canals, and the proportions of chemical elements in the apicectomized surfaces. Study design: Twenty-four teeth were divided into three groups of eight and each group underwent apicectomy by one of three different ablation techniques: bur, CO 2 laser or Er:YAG laser. The morphology of the apicectomized surfaces was then analyzed using scanning electron microscopy and their chemical composition was analyzed by energy dispersive spectroscopy. Results: Surfaces produced with ablation by bur exhibited less surface irregularities and better marginal fit, while ablation with the CO 2 laser caused intense surface carbonization and failures in obturation material fit. Conclusions: Our results suggest that, taking into consideration their clinical application, ablation of tooth apices using burs proved to be the best option among those tested here.

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“…[8][9][10] It is used for conditioning hard tissue surfaces, including those of teeth and bone. 11 Due to high absorption of Er,Cr:YSGG in both water and hydroxyapatite, it can be used in both oral soft and hard tissues.…”

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confidence: 99%

Er,Cr:YSGG Laser as a Novel Method for Rebonding Failed Ceramic Brackets

Sohrabi

Jafari

Kimyai

et al. 2016

Photomedicine and Laser Surgery

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Objective: Since there is no standard method for rebonding loose ceramic brackets, the aim of this study was to evaluate the possibility of using Er,Cr:YSGG laser to eliminate the remaining composite materials from the base of ceramic brackets and to compare the bond strength of rebonded brackets with the new ones. Materials and methods: Sixty-two extracted human premolars were mounted in acrylic cylinders. Thirty-one ceramic brackets were bonded, and shear bond strength was tested using Hounsfield testing machine. The remnants of the bonding material were removed from the bases of brackets using Er,Cr:YSGG laser. These brackets were rebonded to 31 fresh teeth and again shear bond strength was measured. Pattern of debonding was assessed in both cases under a stereomicroscope and graded according to ARI index. Data were analyzed with independent t-test and Fisher's exact test. Results: Mean shear bond strength of the bond and rebond groups was 12.29 -5.46 and 10.58 -5.16 MPa, respectively. There were no significant differences between the two groups ( p = 0.21). Pattern of bond failure was not statistically different between the two groups. Conclusions: Er,Cr:YSGG laser was effective in removing the remnants of bonding material from the base of ceramic brackets without any interference with the ceramic base itself, demonstrating that it might be a suitable method for rebonding ceramic brackets.

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In vitro evaluation of the temperature increment at the external root surface after Er,Cr:YSGG laser irradiation of the root canal

Cited by 19 publications

References 17 publications

Evaluation of chemical and morphological changes in radicular dentin after different final surface treatments

Evaluation of chemical and morphological changes in radicular dentin after different final surface treatments

Analysis of the morphology and composition of tooth apices apicectomized using three different ablation techniques

Er,Cr:YSGG Laser as a Novel Method for Rebonding Failed Ceramic Brackets

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