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Fakhri E, Samadi Kafil H, Naghizadeh M, Eslami H, Sefidan FY. Antimicrobial effect of grape seed extract as a potential intracanal medicament combined with Nd:YAG laser. AUST ENDOD J 2023; 49 Suppl 1:209-216. [PMID: 36479792 DOI: 10.1111/aej.12718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 09/23/2022] [Accepted: 11/06/2022] [Indexed: 12/12/2022]
Abstract
This study evaluated the antimicrobial efficacy of grape seed extract medicament combined with Nd:YAG laser, against Enterococcus faecalis, Staphylococcus aureus and Candida albicans biofilms. Root canals infected with 4-week-old biofilms were divided into five groups (n = 11): calcium hydroxide, 6.5% GSE, Nd:YAG laser (1064 nm, 1.5 w, 15 Hz and 100 mj) and 6.5% GSE followed by Nd:YAG laser and normal saline (control). Dentin chips were collected using Gates-Glidden and cultured to obtain colony-forming units. Statistical analysis was performed using Kruskal-Wallis and Mann-Whitney U test. GSE showed higher antibacterial activity against all species investigated compared to Ca(OH)2 . However, the lowest microbial count was obtained using a combination of GSE and Nd:YAG laser (p < 0.001). No significant difference in the susceptibility of tested pathogens to each of the protocols was observed (p > 0.05). Application of Nd:YAG laser following GSE medicament is efficient against endodontic biofilms; also, GSE can be considered as an alternative to Ca(OH)2 dressing.
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Affiliation(s)
- Elaheh Fakhri
- Dental and Periodontal Research Center, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Samadi Kafil
- Drug Applied Research Center, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdieh Naghizadeh
- Students' Research Committee, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hosein Eslami
- Department of Oral Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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Olivi M, Raponi G, Palaia G, Berlutti F, Olivi G, Valentini E, Tenore G, Del Vecchio A, Romeo U. Disinfection of Root Canals with Laser-Activated Irrigation, Photoactivated Disinfection, and Combined Laser Techniques: An Ex Vivo Preliminary Study. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2020; 39:62-69. [PMID: 33332214 DOI: 10.1089/photob.2020.4879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Objective: This study aimed to evaluate the efficacy of laser-activated irrigation using photon-induced photoacoustic streaming (PIPS®) and photoactivated disinfection (PAD) techniques and their combination to improve penetration and activation of toluidine blue in the endodontic space of teeth experimentally infected with Enterococcus faecalis. Materials and methods: Twenty-seven extracted single-root teeth were instrumented, sterilized, and infected with E. faecalis and divided into seven groups of three teeth each: Group A [sodium hypochlorite (NaClO) 5% hand irrigation], Group B [NaClO 5% hand irrigation+ethylenediaminetetraacetic acid (EDTA)+NaClO 5% activated by PIPS], Group C (EDTA+NaClO 5% activated by PIPS), Group D (toluidine blue activated by PAD), Group E (toluidine blue activated by PIPS and PAD), Group F (NaClO 5% hand irrigation+toluidine blue activated by PAD), and Group G (NaClO 5% hand irrigation+toluidine blue activated by PIPS and PAD). Finally, positive and negative group controls were prepared. The presence of biofilms after the treatments was assessed by the BioTimer assay. PIPS was performed with an Er:YAG laser (2940 nm, LightWalker, Fotona® d.o.o., Slovenia) at 20 mJ, 15 Hz, 0.3 W, and 50-μs pulse duration. PAD was performed with a 635 nm diode laser (Smart M, Lasotronix®, Poland) at 400 mW in continuous wave (CW). Results: When NaClO was used, significant decontamination (p ≤ 0.05) was obtained in all experimental groups with respect to the positive control, other than Group G. Irrigation with EDTA+NaClO activated by PIPS produced a higher level of decontamination than Group A (p ≤ 0.05). Significant results in reducing biofilm load compared with the control and Group A were observed when NaClO was coupled with toluidine blue activated by PAD (p ≤ 0.05). Conclusions: Disinfection of root canals can be obtained using a combination of different irrigants, photosensitizers, and activation protocols. EDTA+NaClO using the PIPS protocol and toluidine blue activated by PAD (both preceded by NaClO irrigation) can be considered effective tools. The possibility of replacing NaClO with toluidine blue, whatever the method of activation, should be further investigated.
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Affiliation(s)
- Matteo Olivi
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Giammarco Raponi
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University of Rome, Rome, Italy
| | - Gaspare Palaia
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Francesca Berlutti
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University of Rome, Rome, Italy
| | | | - Elisa Valentini
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University of Rome, Rome, Italy
| | - Gianluca Tenore
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Alessandro Del Vecchio
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Rome, Italy
| | - Umberto Romeo
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Rome, Italy
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Xiao B, Zou Z, Bhandari J, Zhang Y, Yan G. Exposure to diode laser (810nm) affects the bacterial adherence and biofilm formation in a E. faecalis biofilm model. Photodiagnosis Photodyn Ther 2020; 31:101772. [DOI: 10.1016/j.pdpdt.2020.101772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/14/2020] [Accepted: 04/02/2020] [Indexed: 10/24/2022]
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Seraj B, Moosavi Garmaroodi Z, Chiniforush N, Ghadimi S. Thermal Changes in Root Surface of Primary Teeth During Root Canal Treatment With Diode Lasers: An In Vitro Study. J Lasers Med Sci 2019; 9:237-242. [PMID: 31119017 DOI: 10.15171/jlms.2018.43] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction: Increased temperature due to the application of laser during root canal disinfection may damage periodontium, alveolar bone, and permanent dental germ. The aim of this study was to evaluate the temperature increase of the external surface of primary roots due to the application of 810 nm and 980 nm diode lasers. Methods: A total of 58 extracted human primary teeth were prepared and randomly divided into two groups: (a) 810 nm diode laser and (b) 980 nm diode laser. Then, each group was divided into 4 subgroups based on the location of the temperature measurement, including subgroup 1: external root surface of primary anterior roots (A); subgroup 2: external root surface of posterior teeth at inter-root space (IS); subgroup 3: external root surface of posterior teeth at outer-root space (OS) and subgroup 4: external surface of furcation area of posterior teeth (F). Results: The mean temperature rise in group a (7.02±2.95ºC) was less than that of group b (10.62±4.59ºC) (P<0.001). Also, a significant difference was found between the laser groups in terms of the mean temperature rise of the external root surface at IS, OS and F, with higher temperature increase occurring in all points in laser b. The comparison of irradiation points in each laser showed a higher mean temperature rise for IS than OS, but this difference was only significant in group b (P<0.001). Conclusion: Within the studied parameters, 810 nm and 980 nm diode lasers should be used cautiously in primary root canals because of their temperature rise during their application.
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Affiliation(s)
- Bahman Seraj
- Dental Research Center, Dentistry Reseach Institute, Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Moosavi Garmaroodi
- Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Nasim Chiniforush
- Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Ghadimi
- Laser Research Center of Dentistry, Dentistry Research Institute and Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Ozbay Y, Erdemir A. Effect of several laser systems on removal of smear layer with a variety of irrigation solutions. Microsc Res Tech 2018; 81:1214-1222. [DOI: 10.1002/jemt.23122] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/10/2018] [Accepted: 08/04/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Yagiz Ozbay
- Department of Endodontics, Faculty of DentistryUniversity of Kyrenia Kyrenia Turkey
| | - Ali Erdemir
- Department of Endodontics, Faculty of DentistryKirikkale University Kirikkale Turkey
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Korkut E, Torlak E, Gezgin O, Özer H, Şener Y. Antibacterial and Smear Layer Removal Efficacy of Er:YAG Laser Irradiation by Photon-Induced Photoacoustic Streaming in Primary Molar Root Canals: A Preliminary Study. Photomed Laser Surg 2018; 36:480-486. [DOI: 10.1089/pho.2017.4369] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Emre Korkut
- Department of Pediatric Dentistry, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
| | - Emrah Torlak
- Department of Molecular Biology and Genetics, Faculty of Science, Necmettin Erbakan University, Konya, Turkey
| | - Onur Gezgin
- Department of Pediatric Dentistry, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
| | - Hazal Özer
- Department of Pediatric Dentistry, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
| | - Yağmur Şener
- Department of Pediatric Dentistry, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
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Pereira DL, Freitas AZ, Bachmann L, Benetti C, Zezell DM, Ana PA. Variation on Molecular Structure, Crystallinity, and Optical Properties of Dentin Due to Nd:YAG Laser and Fluoride Aimed at Tooth Erosion Prevention. Int J Mol Sci 2018; 19:ijms19020433. [PMID: 29389868 PMCID: PMC5855655 DOI: 10.3390/ijms19020433] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 11/16/2022] Open
Abstract
This in vitro study evaluated the compositional, crystalline, and morphological effects promoted by Nd:YAG laser on root dentin, and verified the effects of laser and topical acidulated phosphate fluoride application (APF-gel) on dentin erosion. 180 bovine dentin slabs were randomized into 4 groups (n = 45): G1–untreated, G2–APF-gel (1.23% F−, 4 min), G3–Nd:YAG (1064 nm, 84.9 J/cm2, 10 Hz), and G4–APF-gel application followed by Nd:YAG laser irradiation. The compositional, crystalline, and morphological effects promoted by treatments were investigated on five samples of each experimental group. The other samples were submitted to a 5-day, 10-day, or 15-day erosive and abrasive demineralization and remineralization cycling in order to create erosion lesions. The area and depth of lesions, as well as the optical attenuation coefficient, were assessed, and all data were statistically analysed (p < 0.05). Nd:YAG laser promoted the reduction of carbonate, the formation of tetracalcium phosphate, as well as the melting and recrystallization of the dentin surface. Laser significantly decreased the area and depth of erosion lesions and altered the optical attenuation coefficient when compared to untreated and APF-gel groups, but the association of APF-gel and laser did not promote an additional effect. Nd:YAG laser irradiation can be a promissory treatment to prevent dentin erosion and the abrasion process.
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Affiliation(s)
- Daísa L Pereira
- Center for Engineering, Modeling and Applied Social Sciences, Universidade Federal do ABC, Sao Bernardo do Campo, SP 09606-045, Brazil.
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Sao Paulo, SP 05508-000, Brazil.
| | - Anderson Z Freitas
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Sao Paulo, SP 05508-000, Brazil.
| | - Luciano Bachmann
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de Sao Paulo, Ribeirao Preto, SP 14040-900, Brazil.
| | - Carolina Benetti
- Center for Engineering, Modeling and Applied Social Sciences, Universidade Federal do ABC, Sao Bernardo do Campo, SP 09606-045, Brazil.
| | - Denise M Zezell
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Sao Paulo, SP 05508-000, Brazil.
| | - Patricia A Ana
- Center for Engineering, Modeling and Applied Social Sciences, Universidade Federal do ABC, Sao Bernardo do Campo, SP 09606-045, Brazil.
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Arslan D, Kuştarcı A. The effect of the KTP laser on smear layer and temperature change: an in vitro study. Lasers Med Sci 2017; 33:149-157. [DOI: 10.1007/s10103-017-2374-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/26/2017] [Indexed: 10/18/2022]
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In vitro bond strength of an epoxy resin-based root canal sealer to root dentin irradiated with high-power lasers and adhesive interface analyses. Lasers Med Sci 2017; 33:271-277. [DOI: 10.1007/s10103-017-2362-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 10/12/2017] [Indexed: 01/04/2023]
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Batsukh N, Feng SW, Lee WF, Leu SJ, Tsai PY, Ho KN, Lin CT, Su CH, Chang WJ. Effects of Porphyromonas gingivalis on Titanium Surface by Different Clinical Treatment. J Med Biol Eng 2017. [DOI: 10.1007/s40846-016-0194-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zan R, Hubbezoglu I, Unal M. Evaluation of temperature rises during the application of different power levels of potassium titanyl phosphate and neodymium-doped:yttrium aluminum garnet lasers to external primary root canals. J Dent Sci 2016; 11:365-369. [PMID: 30894999 PMCID: PMC6395280 DOI: 10.1016/j.jds.2016.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 03/15/2016] [Indexed: 11/21/2022] Open
Abstract
Background/purpose Nowadays, laser systems play crucial roles in endodontic treatments. Therefore, these systems should be investigated in terms of parameters that may prevent periodontal tissues damages during laser irradiation. In this context, the purpose of this study was to evaluate temperature rises during the application of different power levels of potassium titanyl phosphate (KTP) and neodymium-doped:yttrium aluminum garnet (Nd:YAG) lasers to external primary root canals. Materials and methods Sixty primary mandibular molars were selected and chemomechanical preparation was performed. KTP laser treatment was applied to 30 of these 60 samples and the remaining 30 received Nd:YAG laser treatment. The teeth samples received laser application (KTP or Nd:YAG) at three different power levels (1 W, 1.5 W, and 2 W, respectively, applied to 10 samples from each group). Nine holes were drilled (1 mm in diameter) through the level of the coronal, middle, and apical third of each tooth canal to provide entry for a Type L thermocouple wire, which was used to measure temperature changes. Data were assessed with two-way analysis of variance and the Tukey test. Results All power levels indicated statistically significant differences between Nd:YAG and KTP laser systems (P < 0.05). Moreover, the same regional (apical, middle, and coronal) comparisons performed between Nd:YAG and KTP laser systems showed statistically significant differences (P < 0.05). Conclusion All parameters of KTP laser indicated lower temperature rises than Nd:YAG laser. Therefore, KTP laser may be preferable to protect the periodontal tissues from harmful thermal effects during the endodontic treatment of primary root canals.
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Affiliation(s)
- Recai Zan
- Department of Endodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
- Corresponding author. Department of Endodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey.
| | - Ihsan Hubbezoglu
- Department of Restorative Dentistry, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
| | - Murat Unal
- Department of Pediatric Dentistry, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
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Effect of Er:YAG and Nd:YAG lasers on the mineral content of root canal dentin. Lasers Med Sci 2013; 30:809-13. [DOI: 10.1007/s10103-013-1438-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 09/03/2013] [Indexed: 10/26/2022]
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Wen X, Zhang L, Liu R, Deng M, Wang Y, Liu L, Nie X. Effects of pulsed Nd:YAG laser on tensile bond strength and caries resistance of human enamel. Oper Dent 2013; 39:273-82. [PMID: 23919623 DOI: 10.2341/12-416-l] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aims to evaluate the effects of pulsed Nd:YAG laser on the tensile bond strength (TBS) of resin to human enamel and caries resistance of human enamel. A total of 201 human premolars were used in this in vitro study. A flat enamel surface greater than 4 × 4 mm in area was prepared on each specimen using a low-speed cutting machine under a water coolant. Twenty-one specimens were divided into seven groups for morphology observations with no treatment, 35% phosphoric acid etching (30 seconds), and laser irradiation (30 seconds) of pulsed Nd:YAG laser with five different laser-parameter combinations. Another 100 specimens were used for TBS testing. They were embedded in self-cured acrylic resin and randomly divided into 10 groups. After enamel surface pretreatments according to the group design, resin was applied. The TBS values were tested using a universal testing machine. The other 80 specimens were randomly divided into eight groups for acid resistance evaluation. Scanning electron microscope (SEM) results showed that the enamel surfaces treated with 1.5 W/20 Hz and 2.0 W/20 Hz showed more etching-like appearance than those with other laser-parameter combinations. The laser-parameter combinations of 1.5 W/15 Hz and 1.5 W/20 Hz were found to be efficient for the TBS test. The mean TBS value of 14.45 ± 1.67 MPa in the laser irradiated group was significantly higher than that in the untreated group (3.48 ± 0.35 MPa) but lower than that in the 35% phosphoric acid group (21.50 ± 3.02 MPa). The highest mean TBS value of 26.64 ± 5.22 MPa was identified in the combination group (laser irradiation and then acid etching). Acid resistance evaluation showed that the pulsed Nd:YAG laser was efficient in preventing enamel demineralization. The SEM results of the fractured enamel surfaces, resin/enamel interfaces, and demineralization depths were consistent with those of the TBS test and the acid resistance evaluation. Pulsed Nd:YAG laser as an enamel surface pretreatment method presents a potential clinical application, especially for the caries-susceptible population or individuals with recently bleached teeth.
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Tosun E, Tasar F, Strauss R, Kıvanc DG, Ungor C. Comparative Evaluation of Antimicrobial Effects of Er:YAG, Diode, and CO2 Lasers on Titanium Discs: An Experimental Study. J Oral Maxillofac Surg 2012; 70:1064-9. [DOI: 10.1016/j.joms.2011.11.021] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Accepted: 11/17/2011] [Indexed: 11/27/2022]
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Bolortuya G, Ebihara A, Ichinose S, Watanabe S, Anjo T, Kokuzawa C, Saegusa H, Kawashima N, Suda H. Effects of dentin surface modifications treated with Er:YAG and Nd:YAG laser irradiation on fibroblast cell adhesion. Photomed Laser Surg 2011; 30:63-70. [PMID: 22107609 DOI: 10.1089/pho.2011.3132] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The purpose of this in vitro study was to evaluate the effect of surface modifications induced by erbium (Er):YAG and neodymium (Nd):YAG laser irradiation on cell adhesion by comparing it to that of conventional methods for surface preparation after root-end resection. BACKGROUND DATA Many studies have been seeking a favorable method to produce a resected root end with optimal conditions for cell response. However, little improvement has been achieved. This study evaluated the biocompatibilities of resected root surfaces after Er:YAG or Nd:YAG laser irradiation on initial cell adhesion. MATERIALS AND METHODS Dentin disks were divided into three groups. Group A was left untreated, Group B was treated with Er:YAG laser irradiation (60 mJ/pulse, 10 pps, 60 sec), and Group C with Nd:YAG laser irradiation (60 mJ/pulse, 10 pps, 60 sec). After laser irradiation, the dentin disks were incubated with NIH/3T3 fibroblasts cultured in Dulbecco's modified Eagle's medium. A morphological analysis of the dentin surface and cell adhesion was observed under a scanning electron microscope. Surface roughness was measured using a confocal laser scanning microscope. The statistical analysis was undertaken using ANOVA at a level of significance of 5% (p<0.05). RESULTS Morphological analysis and roughness measurement showed that dentin surfaces treated with Er:YAG laser irradiation were rougher than those in Groups A and C. Group B (Er:YAG) exhibited the greatest number of attached cells among all groups after 12 and 24 h. CONCLUSIONS Morphological alteration induced by Er:YAG laser irradiation showed a favorable effect on the attachment of fibroblasts to dentin surfaces.
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Affiliation(s)
- Gombo Bolortuya
- Pulp Biology and Endodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Wen X, Liu L, Nie X, Zhang L, Deng M, Chen Y. Effect of pulse Nd:YAG laser on bond strength and microleakage of resin to human dentine. Photomed Laser Surg 2010; 28:741-6. [PMID: 20973737 DOI: 10.1089/pho.2009.2579] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES The purpose of this study was to investigate the effect of pulse Nd:YAG laser on human dentine adhesion by optimizing the laser parameter combination and comparing it with other pretreatment methods for dentine adhesion. BACKGROUND DATA In recent decades, many scholars have been seeking an optimal method to enhance the bond strength of resin to human dentine. However, little improvement has been achieved. In this study, pulse Nd:YAG laser was studied as a pretreatment method for dentine adhesion. MATERIALS AND METHODS Two-hundred ten freshly extracted, caries-free human premolars were used in this study, which was conducted after approval from the IRB. Ninety of them were selected and randomly divided into nine groups, according to parameter combinations of pulse Nd:YAG laser. Tensile-bond strength was tested, and the laser parameter combination was optimized for later experiments. The other teeth were randomly divided into six groups: laser-irradiated, acid-etched, laser + acid, 10-3 solution, laser + 10-3 solution, and negative control (unconditioned). Each group had 20 specimens: 10 for tensile-bond strength tests and the other 10 for microleakage examination. After the bond-strength test, the fractured surfaces were examined under scanning electronic microscopy. RESULTS The bond strengths fluctuated with different laser-parameter combinations applied and showed significant differences in different laser-parameter groups (p < 0.01). The highest mean of tensile-bond strength was found in the group irradiated with the parameter combination of 1 W/15 Hz. In the contrasting experiments, the laser-irradiated group, the 10-3 solution group, and the laser + 10-3 solution groups showed higher tensile-bond strength and lower microleakage than did the other three groups (p < 0.05). CONCLUSIONS Pulse Nd:YAG laser, 10-3 solution, and their combination showed favorable effects on bond strength and adaptation of resin to human dentine and can be used to pretreat dentine surfaces before adhesion. The optimal parameter combination of pulse Nd:YAG laser was determined to be 1 W/15 Hz in this study.
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Affiliation(s)
- Xiujie Wen
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Third Military Medical University, Yuzhong District, Chongqing, China
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Michiels R, Vergauwen TEM, Mavridou A, Meire M, De Bruyne M, De Moor RJG. Investigation of Coronal Leakage of Root Fillings After Smear-Layer Removal with EDTA or Nd:YAG Lasing Through Capillary-Flow Porometry. Photomed Laser Surg 2010; 28 Suppl 2:S43-50. [DOI: 10.1089/pho.2009.2575] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Rafaël Michiels
- Department of Operative Dentistry and Endodontology, Ghent Dental Laser Centre, Dental School, Ghent University, Ghent, Belgium
| | - Tom Edgard Maria Vergauwen
- Department of Operative Dentistry and Endodontology, Ghent Dental Laser Centre, Dental School, Ghent University, Ghent, Belgium
| | - Athina Mavridou
- Department of Operative Dentistry and Endodontology, Ghent Dental Laser Centre, Dental School, Ghent University, Ghent, Belgium
| | - Maarten Meire
- Department of Operative Dentistry and Endodontology, Ghent Dental Laser Centre, Dental School, Ghent University, Ghent, Belgium
| | - Mieke De Bruyne
- Department of Operative Dentistry and Endodontology, Ghent Dental Laser Centre, Dental School, Ghent University, Ghent, Belgium
| | - Roeland Jozef Gentil De Moor
- Department of Operative Dentistry and Endodontology, Ghent Dental Laser Centre, Dental School, Ghent University, Ghent, Belgium
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Hmud R, Kahler WA, Walsh LJ. Temperature Changes Accompanying Near Infrared Diode Laser Endodontic Treatment of Wet Canals. J Endod 2010; 36:908-11. [DOI: 10.1016/j.joen.2010.01.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 01/12/2010] [Accepted: 01/15/2010] [Indexed: 11/29/2022]
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