Rationale for using a double-wavelength (940 nm + 2780 nm) laser in endodontics: literature overview and proof-of-concept

Martins, Miguel R.; Franzen, René; Depraet, Frederick; Gutknecht, Norbert

doi:10.1007/s41547-017-0017-9

Cited by 11 publications

(6 citation statements)

References 123 publications

(131 reference statements)

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“…The success of endodontic treatment depends ultimately on the elimination of the microorganism, host response, and coronal seal of root canals [ 22 ]. Achieving long-term successful endodontic treatment without toxic chemical irrigants has always been a long-awaited goal of scientists.…”

Section: Discussionmentioning

confidence: 99%

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The efficacy of 2780 nm Er,Cr;YSGG and 940 nm Diode Laser in root canal disinfection: A randomized clinical trial

Fahim,

Ghali,

Hashem

et al. 2024

Clin Oral Invest

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Objectives Effective disinfection of the root canals is the cornerstone of successful endodontic treatment. Diminishing the microbial load within the root canal system is crucial for healing in endodontically treated teeth. The aim of this study was to evaluate the effect of 2780 nm Er,Cr:YSGG and 940 nm diode lasers on the eradication of microorganisms from single-rooted teeth with asymptomatic apical periodontitis. Materials and Methods Thirty participants conforming to the inclusion criteria were randomly divided into 3 groups according to the disinfection protocol used; Conventional group: 2.5% Sodium Hypochlorite (NaOCl) and 17% EDTA solution NaOCl/EDTA, Dual laser group: 2780 nm Erbium, chromium: yttrium scandium-gallium-garnet (Er,Cr:YSGG) laser and 940 nm diode laser Er,CrYSGG/Diode, and Combined group: 17% EDTA and 940 nm diode laser EDTA/Diode. Bacterial samples were collected before and after intervention. The collected data were statistically analyzed using Friedman’s test and Kruskal–Wallis test (P ≤ 0.05). Results The results of the study showed that both dual laser Er,CrYSGG/Diode and combined laser EDTA/Diode groups showed significantly less mean Log10 CFU/ml of aerobic and anaerobic bacterial counts than the conventional NaOCl/EDTA group. Conclusions In this study we evaluated in vivo the bactericidal efficacy of three disinfection protocols for endodontic treatment of single-rooted teeth with apical periodontitis. The results indicated that both dual laser Er,CrYSGG/Diode and combined laser EDTA/Diode groups provide superior bactericidal effect compared to the conventional NaOCl/EDTA group. Clinical relevance The integration of lasers into root canal disinfection protocols has demonstrated significant bacterial reduction which might promote healing and long-term success.

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Section: Discussionmentioning

confidence: 99%

“…further in vivo research used 2780 and 940 nm wavelengths for smear layer removal and achieved deep dentin disinfection respectively on two cases of relatively high endodontic complexity. Their 1-year follow-up supported the effectiveness of this treatment strategy [ 22 ].…”

Section: Introductionmentioning

confidence: 89%

The efficacy of 2780 nm Er,Cr;YSGG and 940 nm Diode Laser in root canal disinfection: A randomized clinical trial

Fahim,

Ghali,

Hashem

et al. 2024

Clin Oral Invest

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“…15,16 In 2018, Martins et al reported the reduction of the bacterial count in deep layers of the infected root canal wall up to 74% by means of the diode laser (810 nm). 19 In 2018, Tilakchand et al performed an in vivo study in order to evaluate the antibacterial effect of the diode laser on the infected root canal wall. The laser used in this study was EZLASE diode laser (940 nm).…”

Section: Discussionmentioning

confidence: 99%

Effect of an 810 nm Diode Laser on the Healing of a Periapical Abscess

et al. 2021

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Introduction: The golden standard of the treatment of radicular cysts is mainly root canal therapy or surgical excision with apicectomy. The root canals are usually disinfected by the mechanical and chemical actions of instruments and chemical irrigating solutions respectively. To improve the efficacy of the root canal disinfection process, many techniques have been used and many researchers are still trying to reach the quickest and most convenient way to achieve this goal. Diode lasers have shown antibacterial activity on dentinal tubules, and they can penetrate more than 1000 μm into the dentin. Case Presentation: Our patient was a 25-year-old female with an infraorbital abscess caused by a non-vital maxillary canine with periapical radiolucency. After completing the conventional treatment, the optical fiber was inserted into the canal according to the working length previously measured. An 810 nm diode laser at the output power of 4 W was used to irradiate the root canals, with a 300 μm fiber. The patient was free of pain within a few days. The lesion was resolved in radiographic follow-ups, 3 and 6 months after the root canal treatment. Conclusion: A combination of conventional root canal therapy and an 810 nm diode laser is an effective treatment for non-vital teeth with periapical lesions.

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“…On the other side, near infrared range diode lasers (810, 940, 980 nm) and Nd: YAG laser (1064 nm) are mostly absorbed by hemoglobin and melanin [28] and their disinfection is even deeper (Gutknecht 2008). Therefore, in a recent study of Martins et al (2018) [29], it is suggested the double-wavelength application (erbium and diode laser) for a better outcome of the endodontic therapy as each laser wavelength has a specific absorption coefficient in every tissue [30].…”

Section: Discussionmentioning

confidence: 99%

Smear Layer Removal by Means of Erbium, Chromium: Yttrium Scandium Gallium Garnet (Er, Cr: YSGG) Laser Irradiation from Apical Third of Mesial Root Canals

Kourti¹,

Strakas²,

Pantelidou-Papadopoulou³

et al. 2021

IJDM

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Aim: This ex-vivo study evaluated the efficiency of an Er, Cr: YSGG laser (2780 nm) at different power settings to remove smear layer from the apical third of mesial roots of first lower molars by using SEM. Materials & Methods: 42 mesial root canals of first mandibular molars (type II Vertucci) were divided into 4 groups of 10 teeth each. The rest 2 teeth were used as control groups. After coronal access, all teeth were instrumented by Protaper Gold rotary files up to size F2 (25/0.08), followed an irrigation protocol with saline. Then, the experimental groups were irradiated by Er, Cr: YSGG laser. Four different output powers were tested, namely 1.25 W, 1.5 W, 2 W, 2.5 W was used to irradiate the roots in Group 1 (G1), Group 2 (G2), Group 3 (G3) and Group 4 (G4) respectively. Control group (n=2) was instrumented as experimental groups but not irradiated. Teeth were sectioned longitudinally and observed under SEM. Results were statistically analyzed with the Kruskal-Wallis Test and Mann-Whitney Test. Results: None of the tested groups succeeded in removing completely the smear layer from apical dentinal walls. The results showed no statistically significant differences between laser groups in removing smear layer from apical third of lower molars. Group 3 (2 W) showed better outcomes but it was not statistically significant. Conclusion:The outcome of the present study showed that laser-assisted smear layer removal with an Er, Cr: YSGG laser with the tested parameters is not predicable for the apical third of root canals. Clinical significance: The presence of chelating factor may play an important role in the mechanism of laser-assisted removal of smear layer in the apical third of root canals. Further research needs to be performed in order to find the optimal irradiation protocol.

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Rationale for using a double-wavelength (940 nm + 2780 nm) laser in endodontics: literature overview and proof-of-concept

Cited by 11 publications

References 123 publications

The efficacy of 2780 nm Er,Cr;YSGG and 940 nm Diode Laser in root canal disinfection: A randomized clinical trial

The efficacy of 2780 nm Er,Cr;YSGG and 940 nm Diode Laser in root canal disinfection: A randomized clinical trial

Effect of an 810 nm Diode Laser on the Healing of a Periapical Abscess

Smear Layer Removal by Means of Erbium, Chromium: Yttrium Scandium Gallium Garnet (Er, Cr: YSGG) Laser Irradiation from Apical Third of Mesial Root Canals

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