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Mota ME, Marques MM, Moreira MS, Lascane NADS. Osteoradionecrosis in a Torus Mandibularis Treated by Antimicrobial Photodynamic Therapy: A Case Report. Photobiomodul Photomed Laser Surg 2024; 42:321-323. [PMID: 38536105 DOI: 10.1089/photob.2023.0173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024] Open
Abstract
Background: Osteoradionecrosis (ORN) of the jaws is a late complication after radiotherapy to head and neck cancer. Objective: To describe a rare case of ORN of the torus mandibularis that was successfully managed exclusively with antimicrobial photodynamic therapy (aPDT). Case report: A 72-year-old man presented an exposed necrotic bone observed in the torus mandibularis, extending to the lingual alveolar ridge with no edema nor suppuration. The treatment provided a noninvasive treatment leading to spontaneous sequestrectomy of the torus in 2 weeks with complete mucosal repair in 5 weeks and absence of lesion signs and/or symptoms even after 6 months of follow-up. Conclusions: The aPDT indicated to be a satisfactory treatment for ORN affecting torus mandibularis, a region with surgical limitations, avoiding surgery.
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Affiliation(s)
- Maria Emília Mota
- Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Marcia Martins Marques
- Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
- AALZ, Sigmund Freud University, Wien, Austria
| | - Maria Stella Moreira
- Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
- Department of Stomatology, A.C Camargo Cancer Center, São Paulo, Brazil
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Li X, Ge P, Shen Y, Gao F, Gao F. Gradient-based adaptive wavelet de-noising method for photoacoustic imaging in vivo. J Biophotonics 2024; 17:e202300289. [PMID: 38010284 DOI: 10.1002/jbio.202300289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/12/2023] [Accepted: 11/07/2023] [Indexed: 11/29/2023]
Abstract
Photoacoustic imaging (PAI) has been applied to many biomedical applications over the past decades. However, the received PA signal usually suffers from poor SNR. Conventional solution of employing higher-power laser, or doing long-time signal averaging, may raise the system cost, time consumption, and tissue damage. Another strategy is de-noising algorithm design. In this paper, we propose a gradient-based adaptive wavelet de-noising method, which sets the energy gradient mutation point of low-frequency wavelet components as the threshold. We conducted simulation, ex-vivo and in-vivo experiments using acoustic-resolution PAM. The quality of de-noised PA image/signal by our proposed algorithm has improved by at least 30%, in comparison to the traditional signal denoising algorithms, which produces better contrast and clearer details. Moreover, it produces good results when dealing with multi-layer structures. The proposed de-noising method provides potential to improve the SNR of PA signal under single-shot low-power laser illumination for biomedical applications in vivo.
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Affiliation(s)
- Xinke Li
- Hybrid Imaging System Laboratory, School of Information Science and Technology, ShanghaiTech University, Shanghai, China
| | - Peng Ge
- Hybrid Imaging System Laboratory, School of Information Science and Technology, ShanghaiTech University, Shanghai, China
| | - Yuting Shen
- Hybrid Imaging System Laboratory, School of Information Science and Technology, ShanghaiTech University, Shanghai, China
| | - Feng Gao
- Hybrid Imaging System Laboratory, School of Information Science and Technology, ShanghaiTech University, Shanghai, China
| | - Fei Gao
- Hybrid Imaging System Laboratory, School of Information Science and Technology, ShanghaiTech University, Shanghai, China
- Shanghai Engineering Research Center of Energy Efficient and Custom AI IC, Shanghai, China
- Shanghai Clinical Research and Trial Center, Shanghai, China
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3
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Abbasiazar D, Mollazadehghomi S, Javadi A, Darabi S, Mollazadehghomi S, Abdali H. Low-Level Laser and Bovine Amniotic Fluid-derived Cream Accelerating Skin Neck Wound Healing and Reducing Inflammation and Wound Scar in a Rat Animal Model. J Cutan Aesthet Surg 2022; 15:267-274. [PMID: 36561395 PMCID: PMC9764950 DOI: 10.4103/jcas.jcas_79_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background Nowadays, wound healing is one of the main problems of patients. Therefore, extensive research is underway to discover mechanisms associated with non-scarring of wounds. Using amniotic fluid and laser may potentially play a key role in wound healing and scar reduction due to its presence in tissue growth and repair agents. Aim The present study evaluated the effect of bovine amniotic fluid (BAF)-derived cream and low-power laser (LPL) on accelerating skin wound healing and reducing scarring in an animal model. Materials and Methods Therefore, 72 male Wistar rats were randomly divided into three groups (each group: 24). A wound 6 mm in diameter was then inflicted on the rats' backs. In the first group that was the control group, the wound was only used. Moreover, BAF was implemented for the second group, and in the third group, LPL radiation was utilized. On the 1st, 3rd, 5th, 14th, and 21st days, the healing condition of the wound and scar created were examined. Results Hence, evaluation of wound healing status on days 5 and 14 showed that the wound healing scale in the BAF group and LPL group was significantly better than that of the control group. On the 21st day, the average Scar Scoring Scale in the BAF and LPL groups was significantly lower than that of the control group. Histological images showed a significant repair in the LPL and BAF groups. Conclusion To conclude, considering the positive effect of LPL and BAF on wound healing and less scarring, it seems that LPL and BAF can heal wounds faster. Moreover, they can be used to prevent scarring after wound healing.
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Affiliation(s)
- Davoud Abbasiazar
- Department of Surgery, School of Medicine, Esfahan University of Medical Sciences, Esfahan, Iran
| | - Shamim Mollazadehghomi
- Cellular and Molecular Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Arghavan Javadi
- School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Shahram Darabi
- Cellular and Molecular Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | | | - Hossien Abdali
- Department of Surgery, School of Medicine, Esfahan University of Medical Sciences, Esfahan, Iran,Address for correspondence: Dr. Hossein Abdali, Department of Surgery, School of Medicine, Esfahan University of Medical Sciences, Esfahan, Iran. E-mail:
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Garcez AS, Delgado MGT, Sperandio M, Dantas E Silva FT, de Assis JSR, Suzuki SS. Photodynamic Therapy and Photobiomodulation on Oral Lesion in Patient with Coronavirus Disease 2019: A Case Report. Photobiomodul Photomed Laser Surg 2021; 39:386-389. [PMID: 34009028 DOI: 10.1089/photob.2020.4977] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Objective: This article reports the case of a patient with oral manifestation of coronavirus disease 2019 (COVID-19) treated with photobiomodulation (PBM) and photodynamic therapy (PDT). Background: Some dermatological and oral mucosal lesions have recently been linked to severe acute respiratory syndrome coronavirus 2 infection. Methods: A 65-year-old female patient with a confirmed real-time reverse transcriptase-polymerase chain reaction diagnosis of COVID-19 presented with dry edematous lips, edema with mucosal desquamation, ulceration and blood crust on the inner aspect of the lips, gingival petechiae and erythematous and pseudomembranous lesions on the dorsum of the tongue. The treatment protocol was three sessions of antimicrobial PDT (aPDT) (660 nm diode laser + methylene blue) to the lips and tongue, every 24 h to control contamination, followed by PBM (low-power laser, 100 mW, 2 J/point) to the lips, tongue, and oral mucosa for additional four sessions every 24 h. Results: Therapy association promoted pain control and healing of oral mucosal lesions in 7 days of treatment. Conclusions: PBM and aPDT could be an interesting approach to manage COVID-19 patients.
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Al Musawi MS, Al-Gailani BT. In Vitro Biostimulation of Low-Power Diode Pumping Solid State Laser Irradiation on Human Serum Proteins. Photobiomodul Photomed Laser Surg 2020; 38:667-672. [PMID: 33103965 DOI: 10.1089/photob.2020.4873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Objective: This research is conducted to clarify whether the action of low-power diode pumping solid state (DPSS) laser doses modify proteins of normal human blood serum in vitro. Background data: Low-power laser light is considered to act through biostimulation rather than through thermal effects. It was found that low-power laser light biostimulates various biological processes, such as increasing the blood flow within the microcirculation. Methods: Human blood serum samples were carefully collected and divided into five equal aliquots. One of them served as a control (nonirradiated serum) and the other four aliquots were irradiated by DPSS laser at a wavelength of 589 nm with different doses (50, 70, 90, and 110 J/cm2). The electrophoretic migration speeds of each specific protein were measured immediately after irradiation using protein electrophoresis. A paired Student's t-test was used between variables. Results: The protein concentrations were not significantly (p > 0.05) changed by the various doses of DPSS laser comparing with the nonirradiated counterpart. The electrophoretic migration speed of serum proteins was significantly decreased in almost all tested doses relative to the nonirradiated counterpart. Moreover, the irradiation of serum proteins (albumin, alpha1, alpha 2, beta, and globulin) with a laser dose of 70 J/cm2 was associated with a significant decrease (p < 0.003, 0.02, 0.002, 0.02 and 0.001, respectively) in protein migration speed compared with the protein migration speed of the control nonirradiated counterpart. Conclusions: Laser light at a wavelength of 589 nm induces processes that lead to decreases in serum protein migration speeds. Globulin protein was found to have the lowest migration speed among the other plasma proteins.
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Zhang G, Gou H, Liu Y, Xi K, Jiang D, Jia X. pH-responsive PEG-chitosan/iron oxide hybrid nanoassemblies for low-power assisted PDT/PTT combination therapy. Nanomedicine (Lond) 2020; 15:1097-1112. [PMID: 32326820 DOI: 10.2217/nnm-2020-0022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Aim: To develop a hybrid nanoassembly platform using PEG-chitosan/iron oxide nanoparticles for effective low-power assisted photodynamic/photothermal combination therapy. Materials & methods: The hybrid nanoassemblies (NAs) were firstly fabricated by self-assembling chitosan and iron oxide nanoparticles, following which their surfaces were modified with polyethylene glycolated triphenylphosphine and loaded with methylene blue (MB) photosensitizer. The physical characteristics and phototherapy effects of these NAs were evaluated. Results: The formed MB-loaded NAs could produce both heat and singlet oxygen under low-power near-infrared irradiation, which would damage the cancer cells. Delivered by intravenous injection, the MB-loaded NAs showed high tendency to accumulate at the tumor sites, which would lead to effective cancer treatment under controlled photoexcitation without damaging the normal tissues. Conclusion: The proposed low-power assisted simultaneous photodynamic/photothermal approach effectively improves treatment efficiency and provides safe and precise treatment option.
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Affiliation(s)
- Guiyang Zhang
- School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
| | - Huilin Gou
- School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
| | - Yanfeng Liu
- School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
| | - Kai Xi
- School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
| | - Dechen Jiang
- School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
| | - Xudong Jia
- School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
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de Castro JR, de Souza EMN, Park YJ, de Campos L, Cha S, Arana-Chavez VE, Nicolau J, Simões A. Low-power laser irradiation decreases lipid droplet accumulation in the parotid glands of diabetic rats. J Biophotonics 2018; 11:e201700179. [PMID: 29112328 DOI: 10.1002/jbio.201700179] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 11/03/2017] [Indexed: 06/07/2023]
Abstract
Lipid droplet accumulation has been related to salivary gland hypofunction in diabetes. In this study, the effect of laser irradiation on the parotid glands (PGs) of diabetic rats was analyzed with regard to its effect on lipid droplet accumulation, intracellular calcium concentration and calmodulin expression. The animals were distributed into 6 groups: D0, D5, D20 and C0, C5, C20, for diabetic (D) and control animals (C), respectively. Twenty-nine days following diabetes induction, PGs of groups D5 and C5; D20 and C20 were irradiated with 5 and 20 J/cm2 of a red diode laser at 100 mW, respectively. After 24 hours, PGs were removed for histological, biochemical, and western blotting analysis. The diabetic animals showed lipid droplet accumulation, which was decreased after irradiation. Ultrastructurally, the droplets were nonmembrane bound and appeared irregularly located in the cytoplasm. Moreover, diabetic animals showed an increased intracellular calcium concentration. In contrast, after laser irradiation a progressive decrease in the concentration of this ion was observed, which would be in agreement with the results found in the increased expression of calmodulin in D20. These data are promising for using laser to decrease lipid droplet accumulation in PGs, however, more studies are necessary to better understand its mechanisms. Micrographs showing decreased lipid accumulation after laser irradiation in light micrographs (LM), and morphology of lipid droplet in transmission electron microscopic (TEM). LM: (A) PGs from nondiabetic rats that did not receive Laser irradiation (LI), (B) PGs from nondiabetic rats that received a dose of 20 J/cm2 , (C) lipid accumulation (arrows) in the secretory cells from diabetic rats that did not receive irradiation, (D) reduction of lipid accumulation in the secretory cells from diabetic rats that received a dose of 20 J/cm2 and TEM: (E) scale bar = 5 μm, (F) scale bar = 1 μm, and (G) scale bar = 0.5 μm.
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Affiliation(s)
- Juliana R de Castro
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Eugen M N de Souza
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Yun-Jong Park
- Oral Maxillofacial Diagnostic Sciences, College of Dentistry, University of Florida, Gainesville, Florida
| | - Luana de Campos
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
- Department of Oral Medicine, Brazilian Institute for Cancer Control, São Paulo, Brazil
| | - Seunghee Cha
- Oral Maxillofacial Diagnostic Sciences, College of Dentistry, University of Florida, Gainesville, Florida
| | - Victor E Arana-Chavez
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - José Nicolau
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Alyne Simões
- Laboratory of Oral Biology, Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil
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Pinheiro CCG, de Pinho MC, Aranha AC, Fregnani E, Bueno DF. Low Power Laser Therapy: A Strategy to Promote the Osteogenic Differentiation of Deciduous Dental Pulp Stem Cells from Cleft Lip and Palate Patients. Tissue Eng Part A 2017; 24:569-575. [PMID: 28699387 DOI: 10.1089/ten.tea.2017.0115] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Dental pulp stem cells (DPSCs) can undergo several types of differentiation, including osteogenic differentiation. One osteogenesis-inducing factor that has been previously described is in vitro low-power laser irradiation of cells. Laser irradiation promotes the acceleration of bone matrix mineralization of the cell strain. However, no consensus exists regarding the dose and treatment time. We used DPSC strains from cleft lip and palate patients because new bone tissue engineering strategies have used DPSCs in preclinical and clinical trials for the rehabilitation of alveolar bone clefts. Optimizing bone tissue engineering techniques for cleft and lip palate patients by applying low-power laser therapy (LPLT) to DPSCs obtained from these patients can help improve current strategies to quickly close large alveolar clefts. The aim of this study was to investigate the effects of LPLT at different energy densities in DPSC strains obtained from cleft lip and palate patients during in vitro osteogenic differentiation. Ten DPSC strains were obtained from cleft lip and palate patients and then used in the following study groups: group 1: control, the strains underwent osteogenic differentiation for 21 days; and groups 2, 3, and 4: the strains were irradiated each day with a low-power red laser (660 nm) (5, 10, and 20 J) during 21 days of osteogenic differentiation. Using Bonferroni's test, a statistically significant difference in the mean values was found between the irradiated groups (2, 3, and 4) and the control group (p < 0.001). However, no significant difference in osteogenic potential was found among the irradiated groups. Our findings showed that the osteogenic potential of DPSCs increases with red laser irradiation at 5, 10, and 20 J, and this treatment could be considered a new approach for preconditioning these cells to be used in bone tissue engineering.
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Affiliation(s)
- Carla C G Pinheiro
- Instituto de Ensino e Pesquisa, Hospital Sírio Libanês , São Paulo, São Paulo, Bela Vista, Brazil
| | - Milena C de Pinho
- Instituto de Ensino e Pesquisa, Hospital Sírio Libanês , São Paulo, São Paulo, Bela Vista, Brazil
| | - Ana Cecilia Aranha
- Instituto de Ensino e Pesquisa, Hospital Sírio Libanês , São Paulo, São Paulo, Bela Vista, Brazil
| | - Eduardo Fregnani
- Instituto de Ensino e Pesquisa, Hospital Sírio Libanês , São Paulo, São Paulo, Bela Vista, Brazil
| | - Daniela F Bueno
- Instituto de Ensino e Pesquisa, Hospital Sírio Libanês , São Paulo, São Paulo, Bela Vista, Brazil
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Kikuchi T, Mogi M, Okabe I, Okada K, Goto H, Sasaki Y, Fujimura T, Fukuda M, Mitani A. Adjunctive Application of Antimicrobial Photodynamic Therapy in Nonsurgical Periodontal Treatment: A Review of Literature. Int J Mol Sci 2015; 16:24111-26. [PMID: 26473843 PMCID: PMC4632741 DOI: 10.3390/ijms161024111] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/26/2015] [Accepted: 10/08/2015] [Indexed: 12/14/2022] Open
Abstract
Periodontal disease is caused by dental plaque biofilms, and the removal of these biofilms from the root surface of teeth plays a central part in its treatment. The conventional treatment for periodontal disease fails to remove periodontal infection in a subset of cases, such as those with complicated root morphology. Adjunctive antimicrobial photodynamic therapy (aPDT) has been proposed as an additional treatment for this infectious disease. Many periodontal pathogenic bacteria are susceptible to low-power lasers in the presence of dyes, such as methylene blue, toluidine blue O, malachite green, and indocyanine green. aPDT uses these light-activated photosensitizer that is incorporated selectively by bacteria and absorbs a low-power laser/light with an appropriate wavelength to induce singlet oxygen and free radicals, which are toxic to bacteria. While this technique has been evaluated by many clinical studies, some systematic reviews and meta-analyses have reported controversial results about the benefits of aPDT for periodontal treatment. In the light of these previous reports, the aim of this review is to provide comprehensive information about aPDT and help extend knowledge of advanced laser therapy.
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Affiliation(s)
- Takeshi Kikuchi
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
| | - Makio Mogi
- Department of Medicinal Biochemistry, School of Pharmacy, Aichi Gakuin University, Nagoya, Aichi 464-8650, Japan.
| | - Iichiro Okabe
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
| | - Kosuke Okada
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
| | - Hisashi Goto
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
| | - Yasuyuki Sasaki
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
| | - Takeki Fujimura
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
| | - Mitsuo Fukuda
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
| | - Akio Mitani
- Department of Periodontology, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi 464-8651, Japan.
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Abstract
Low-level laser therapy has become an important tool for bio-modulation process. It can induce stimulatory or inhibitory effects according to cell behavior at specific irradiation. Our objective was to determine L929 cell line response to irradiation at λ 685 and 830 nm, concentrations of 5 and 10% fetal bovine serum and different energy densities of 0.1, 0.5, 1, 2, 3, 5, 7, 10, 20, and 30 J/cm(2). Thus, cells were plated at 1 × 10(5) cells/mL and irradiated with semiconductor laser As-Ga-Al. Twenty-four hours after irradiation, cells were subjected to MTT, neutral red, crystal violet tests, and cell staining was performed using the kit Alexa Fluor 488 Annexin V-FITC and propidium iodide. Our results showed that low-level laser therapy stimulates effect when the energy density is 5 to 3030 J/cm(2) and inhibits effects on energy density 0.1 to 3 J/cm(2). This inhibitory effect was evidenced by the absence of dead cells labeled, decreased cell density, and by the absorption of neutral red in intact cells. The study also demonstrated that fetal bovine serum, at different concentrations, did not affect response of the cells after irradiation.
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Affiliation(s)
- Juliana Mangolin Marques
- Laboratory of Tissue and Cell Biology, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil Laboratory of Dynamics of Cellular Compartments, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil
| | - Cristina Pacheco-Soares
- Laboratory of Dynamics of Cellular Compartments, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil
| | - Newton Soares Da Silva
- Laboratory of Tissue and Cell Biology, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil
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Khalighi HR, Anbari F, Beygom Taheri J, Bakhtiari S, Namazi Z, Pouralibaba F. Effect of Low-power Laser on Treatment of Orofacial Pain. J Dent Res Dent Clin Dent Prospects 2010; 4:75-8. [PMID: 22991602 PMCID: PMC3429981 DOI: 10.5681/joddd.2010.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Accepted: 07/05/2010] [Indexed: 11/17/2022] Open
Abstract
Low-power lasers are a group of lasers with a power less than 250 mW and unlike high-power lasers they have no effect on tissue temperature; they produce light-dependent chemical reactions in tissues. These lasers have analgesic features with their ability to trigger reactions that reduce pain and inflammatory mediators. Low-power lasers can also be used instead of needles in acupuncture to decrease pain. Due to these features they have been used in the treatment of orofacial pain, including tooth hypersensitivity, post-operative flare-ups, mucositis, facial myalgia, temporomandibular joint disorders and neuralgia. In this article we review the effects of low-power lasers and their success rate in different studies. As the name implies (LASER: Light Amplification by the Stimulated Emission of Radiation), laser amplifies light by stimulated and excited radiation; in other words, it is amplification of excited light emission. Such radiation usually has some characteristic features, including mono-chromaticity, coherency, high intensity and polarity. There are various classifications for lasers based on their active material (solid, fluid and gas), wavelength, emission type and power.
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Affiliation(s)
- Hamid Reza Khalighi
- Assistant Professor, Department of Oral Medicine, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fahimeh Anbari
- Postgraduate Student, Department of Oral Medicine, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Jamileh Beygom Taheri
- Associate Professor, Department of Oral Medicine, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sedigheh Bakhtiari
- Assistant Professor, Department of Oral Medicine, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Firoz Pouralibaba
- Assistant Professor, Department of Oral Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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