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Le JRM, Wu JH, Jaw FS, Su CT. The effect of bone remodeling with photobiomodulation in dentistry: a review study. Lasers Med Sci 2023; 38:265. [PMID: 37973668 DOI: 10.1007/s10103-023-03933-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023]
Abstract
Photobiomodulation (PBM) has been emerging as a promising alternative therapy in dentistry. However, various parameters of PBM are used in different studies, and there is limited cumulative data on PBM for improving bone formation in clinical trials. The aim of this review was to evaluate the effectiveness of PBM in the process of bone remodeling in dentistry using randomized controlled trials. Initially, a total of 1,011 articles published from January 2008 to December 2021 were retrieved from five electronic databases (PubMed, Scopus, Cochrane Library, EMBASE, and CINAHL). After a two-step review, nine articles met the inclusion criteria. The parameter of PBM, group, treatment sessions, assessment times and outcomes of the included studies were reviewed. Eighty-nine percent of the studies revealed positive effects on bone formation between the laser group and the control group. Only one article reported that light-emitting diode did not significantly enhance osteogenesis. Additionally, the present study shows that Gallium aluminum arsenide of near infrared (NIR) laser with continuous mode is the most commonly used form of PBM. The biostimulatory effects are dependent on several parameters, with wavelength and dose being more important than others. Based on this review, it is suggested that the NIR range and an appropriate dose of PBM could be used to increase the efficiency of stimulating bone healing and remodeling. However, standardization of treatment protocols is needed to clarify therapeutic strategies in dentistry.
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Affiliation(s)
- Jie-Ren Mi Le
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Jih-Huah Wu
- Department of Biomedical Engineering, Ming Chuan University, Taoyuan, 33348, Taiwan
| | - Fu-Shan Jaw
- Department of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Chuan-Tsung Su
- Department of Healthcare Information and Management, Ming Chuan University, Taoyuan City, 33348, Taiwan.
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Wang X, Liu Q, Peng J, Song W, Zhao J, Chen L. The Effects and Mechanisms of PBM Therapy in Accelerating Orthodontic Tooth Movement. Biomolecules 2023; 13:1140. [PMID: 37509176 PMCID: PMC10377711 DOI: 10.3390/biom13071140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/11/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Malocclusion is one of the three major diseases, the incidence of which could reach 56% of the imperiled oral and systemic health in the world today. Orthodontics is still the primary method to solve the problem. However, it is clear that many orthodontic complications are associated with courses of long-term therapy. Photobiomodulation (PBM) therapy could be used as a popular way to shorten the course of orthodontic treatment by nearly 26% to 40%. In this review, the efficacy in cells and animals, mechanisms, relevant cytokines and signaling, clinical trials and applications, and the future developments of PBM therapy in orthodontics were evaluated to demonstrate its validity. Simultaneously, based on orthodontic mechanisms and present findings, the mechanisms of acceleration of orthodontic tooth movement (OTM) caused by PBM therapy were explored in relation to four aspects, including blood vessels, inflammatory response, collagen and fibers, and mineralized tissues. Also, the cooperative effects and clinical translation of PBM therapy in orthodontics have been explored in a growing numbers of studies. Up to now, PBM therapy has been gaining popularity for its non-invasive nature, easy operation, and painless procedures. However, the validity and exact mechanism of PBM therapy as an adjuvant treatment in orthodontics have not been fully elucidated. Therefore, this review summarizes the efficacy of PBM therapy on the acceleration of OTM comprehensively from various aspects and was designed to provide an evidence-based platform for the research and development of light-related orthodontic tooth movement acceleration devices.
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Affiliation(s)
- Xinyuan Wang
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
| | - Qian Liu
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
| | - Jinfeng Peng
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
| | - Wencheng Song
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
| | - Jiajia Zhao
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
| | - Lili Chen
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
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Xu C, Ji G, Chen X, Yan L, Liang T, Liu J, Wang F. Sclerostin antibody promotes bone formation through the Wnt/β-catenin signaling pathway in femoral trochlear after patellar instability. Connect Tissue Res 2023; 64:148-160. [PMID: 36379907 DOI: 10.1080/03008207.2022.2135507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PURPOSE The molecular mechanism of patellar instability (PI) remains unknown. The purpose of this study was to explore the function of SOST/sclerostin in PI and examine the effect of sclerostin antibody (Scl-Ab). MATERIALS AND METHODS We randomly divided 60 male 3-week-old C57Bl/6 mice into four groups: sham, PI, Scl-Ab intraperitoneal injection (Scl-Ab IP), Scl-Ab intraarticular injection (Scl-Ab IA). PI was established in the latter three groups. The Scl-Ab IP/IA groups were administered with an intraperitoneal/intraarticular Scl-Ab injection (100 mg/kg, 20 µl), respectively, at 5-day intervals. Distal femurs were collected 30 days after the surgery. The SOST/sclerostin, β-catenin, ALP, OPG and RANKL expression in distal femur were determined. Trochlear morphology and structural parameters of the trabecular and cortical bone compartments were determined by micro-CT. Further sub-regional analysis was performed. HE staining and Masson's trichrome staining were performed to evaluate cartilage changes. RESULTS PI increased the expression of SOST/sclerostin and RANKL, and decreased β-catenin, ALP and OPG levels, while Scl-Ab IP reversed these changes. Scl-Ab IP brought trochlear morphology closer to normality. Additionally, Scl-Ab IP significantly improved most of the bone parameters. Importantly, both PI and Scl-Ab IP acted mainly on trabecular bone. Histological analysis showed that Scl-Ab IP protected cartilage from degeneration. However, Scl-Ab IA did not protect against bone loss or cartilage degradation. CONCLUSIONS SOST/sclerostin plays an important role in PI and systemic Scl-Ab use promotes bone formation through the Wnt/β-catenin signaling pathway in the femoral trochlear after PI.
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Affiliation(s)
- Chenyue Xu
- Department of Orthopaedic Surgery, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Gang Ji
- Department of Orthopaedic Surgery, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Xiaobo Chen
- Department of Orthopaedic Surgery, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, Hebei, China
| | - Lirong Yan
- College of Basic Medicine, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Tuwan Liang
- College of Medical, Hubei University of Science and Technology, Xianning, Hubei, China
| | - Junle Liu
- College of Basic Medicine, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Fei Wang
- Department of Orthopaedic Surgery, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, Hebei, China
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Chen J, Sang Y, Li J, Zhao T, Liu B, Xie S, Sun W. Low-level controllable blue LEDs irradiation enhances human dental pulp stem cells osteogenic differentiation via transient receptor potential vanilloid 1. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 233:112472. [PMID: 35660312 DOI: 10.1016/j.jphotobiol.2022.112472] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 05/04/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Human dental pulp stem cells (hDPSCs) have attracted tremendous attention in tissue regeneration engineering due to their excellent multidirectional differentiation potential. Photobiomodulation (PBM) using low-level light-emitting diodes (LEDs) or lasers has been proved to promote the osteogenesis of mesenchymal stem cells. However, the effect of LEDs on osteogenic differentiation of hDPSCs has little published data. In this work, the effect of blue LEDs with different energy densities of 2, 4, 6, 8, 10 J/cm2 on osteogenic differentiation of hDPSCs was examined by using in vitro ALP staining, ALP activity, mineralization, and real-time PCR. The results showed that compared with the control group, osteogenic differentiation was significantly enhanced in blue LEDs treated groups. As the energy density increased, the level of osteogenesis initially increased and then decreased reaching the highest level at 6 J/cm2. Transient receptor potential vanilloid 1 (TRPV1), a Ca2+ ion channel, was believed to be a potential player in osteogenesis by photobiomodulation. By immunofluorescence assay, calcium influx assay, PCR, and ALP staining, it was shown that blue LEDs irradiation can increase the activity of TRPV1 and intracellular calcium levels similarly to the agonist of TRPV1 capsaicin. Additionally, pretreatment with capsazepine, a selective TRPV1 inhibitor, was able to abrogate the osteogenic effect of blue LEDs. In conclusion, these findings proposed that blue LEDs can promote the osteogenesis of hDPSCs within the appropriate range (4-8 J/cm2) during culture of osteogenic medium, and TRPV1/Ca2+ may be an essential signaling pathway involved in blue LEDs-induced osteogenesis, providing new insights for the use of hDPSCs in tissue regeneration engineering.
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Affiliation(s)
- Jiaqi Chen
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China; Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
| | - Yimeng Sang
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Jiaying Li
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China; Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
| | - Tian Zhao
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China; Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
| | - Bin Liu
- Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Sijing Xie
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China.
| | - Weibin Sun
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China.
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5
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Sleep SL, Skelly D, Love RM, George R. Bioenergetics of photobiomodulated osteoblast mitochondrial cells derived from human pulp stem cells: systematic review. Lasers Med Sci 2021; 37:1843-1853. [PMID: 34806122 DOI: 10.1007/s10103-021-03439-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 10/06/2021] [Indexed: 01/17/2023]
Abstract
Dental pulp cells are a source of multipotent mesenchymal stem cells with a high proliferation rate and multilineage differentiation potential. This study investigated the photobiomodulated bioenergetic effects of mitochondria in osteoblasts that differentiated from human pulp stem cells. The systematic review followed PRISMA guidelines. The PICO question was formulated. Criteria for inclusion and exclusion were established prior to searches being performed on the PubMed/MEDLINE, Embase, and Scopus. Articles were identified and included if published in English within last 10 years; photobiomodulation or low-level laser therapy were discussed; the delivery parameters for dose and time were included and the studies focused on bioenergetics of osteoblast mitochondria. Studies excluded were non-human dental pulp tissue and in vivo studies. A total number of 110 articles were collated, 106 were excluded leaving a total of 4 articles. These studies demonstrated that in vitro use of photobiomodulation was performed using different laser and LED types; InGaAlP; InGaN; and InGaAsP with average wavelengths of 630 to 940 nm. Primary human osteoblastic STRO-1 and mesenchymal stem cell lineages were studied. Three out of four articles confirmed positive bioenergetic effects of photobiomodulation on mitochondria of osteoblasts derived from human pulp cells. This systematic review demonstrated a lack of adequate reporting of bioenergetics of osteoblast mitochondria after photobiomodulation treatment.
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Affiliation(s)
- Simone L Sleep
- School of Medicine and Dentistry, Griffith University, Gold Coast, Australia
| | - Deanne Skelly
- Environmental Futures Research Institute, Griffith University, Nathan, QLD, Australia.,School of Environment and Science, Griffith University, Nathan, QLD, Australia.,Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Robert M Love
- School of Medicine and Dentistry, Griffith University, Gold Coast, Australia
| | - Roy George
- School of Medicine and Dentistry, Griffith University, Gold Coast, Australia.
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Bellato CP, de Oliveira DL, Kasaya MVS, Moreira D, Cini MA, Saraiva PP, Gulinelli JL, Santos PL. Effect of S53P4 bioactive glass and low-level laser therapy on calvarial bone repair in rats submitted to zoledronic acid therapy. Acta Cir Bras 2021; 36:e360603. [PMID: 34259788 PMCID: PMC8275060 DOI: 10.1590/acb360603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/18/2021] [Accepted: 05/16/2021] [Indexed: 10/01/2023] Open
Abstract
PURPOSE To evaluate the influence of bioactive glass and photobiomodulation therapy (PBMT) in calvarial bone repair process in rats submitted to zoledronic acid therapy. METHODS Twenty-four rats were selected and treated with the dose of 0.035 mg/kg of zoledronic acid every two weeks, totalizing eight weeks, to induce osteonecrosis. After the drug therapy, surgical procedure was performed to create 5-mm diameter parietal bone defects in the calvarial region. The rats were then randomly assigned to groups according to the following treatments: AZC: control group, treated with blood clot; AZBIO: bone defect filled with bioactive glass; AZL: treated with blood clot and submitted to PBMT; and AZBIOL: treated with bioactive glass S53P4 and submitted to PBMT. Tissue samples were collected and submitted to histomorphometric analysis after 14 and 28 days. RESULTS At 14 days, bone neoformation in the AZBIO (52.15 ± 9.77) and AZBIOL (49.77 ± 13.58) groups presented higher values (p ≤ 0.001) compared to the AZC (23.35 ± 10.15) and AZL groups (23.32 ± 8.75). At 28 days, AZBIO (80.24 ± 5.41)still presented significant higher bone recovery values when compared to AZC (59.59 ± 16.92)and AZL (45.25 ± 5.41) groups (p = 0.048). In the 28-day period, the AZBIOL group didn't show statistically significant difference with the other groups (71.79 ± 29.38). CONCLUSIONS The bioactive glass is an effective protocol to stimulate bone neoformation in critical defects surgically created in rats with drug induced osteonecrosis, in the studied periods of 14 and 28 days.
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Affiliation(s)
- Caio Peres Bellato
- Fellow PhD degree. Postgraduate Program in Oral and Maxillofacial Surgery. Assistant Professor. Department Oral and Maxillofacial Surgery – Dental School – Universidade do Oeste Paulista – Presidente Prudente (SP), Brazil
| | - Danilo Louzada de Oliveira
- PhD, Assistant Professor. Oral and Maxillofacial Surgery – Department Oral and Maxillofacial Surgery – Dental School – Universidade do Oeste Paulista – Presidente Prudene (SP), Brazil
| | - Marcus Vinicius Satoru Kasaya
- PhD. Oral and Maxillofacial Surgery – Department of Postgraduate – Dental School – Centro Universitário Sagrado Coração – Bauru (SP), Brazil
| | - David Moreira
- PhD. Oral and Maxillofacial Surgery – Department of Postgraduate – Dental School – Centro Universitário Sagrado Coração – Bauru (SP), Brazil
| | - Marcelo Augusto Cini
- PhD. Oral and Maxillofacial Surgery – Department of Postgraduate – Dental School – Centro Universitário Sagrado Coração – Bauru (SP), Brazil
| | - Patricia Pinto Saraiva
- PhD, Assistant Professor. Basic Science – Oral Biology – Universidade do Oeste Paulista – Jau (SP), Brazil
| | | | - Pâmela Leticia Santos
- PhD, Assistant Professor. Oral and Maxillofacial Surgery – Department of Health Sciences – Dental School – Universidade de Araraquara – Araraquara (SP), Brazil
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Long M, Liu X, Huang X, Lu M, Wu X, Weng L, Chen Q, Wang X, Zhu L, Chen Z. Alendronate-functionalized hypoxia-responsive polymeric micelles for targeted therapy of bone metastatic prostate cancer. J Control Release 2021; 334:303-317. [PMID: 33933517 DOI: 10.1016/j.jconrel.2021.04.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/20/2021] [Accepted: 04/27/2021] [Indexed: 12/12/2022]
Abstract
Bone metastasis is one of the leading causes of cancer-related death and remains incurable in spite of great efforts. Bone-targeted nanoparticle-based drug carriers can overcome the difficulties in delivering therapeutic agents to metastatic bone and endowing them with a stimuli-responsive feature for controllable drug release can further maximize their therapeutic outcome. In light of hypoxic microenvironment of bone metastasis, we herein reported a bone-targeted and hypoxia-responsive polymeric micelle system for effective treatment of bone metastatic prostate cancer. The micelles were self-assembled from a polyethylene glycol and poly-l-lysine based copolymer using alendronate as a bone-targeted moiety and azobenzene as a hypoxia-responsive linker, showing a high affinity to metastatic bone and a high sensitivity in responding to hypoxia in vitro. In vivo studies further showed that after a selective accumulation in metastatic bone, the micelles could respond to hypoxic bone metastasis for rapid drug release to an effective therapeutic dosage. As a result, the micelles could suppress tumor growth in bone and inhibit bone destruction by inhibiting osteoclast activity and promoting osteoblast activity, achieving an enhanced therapeutic outcome with relieved bone pain and prolonged survival time. Bone-targeted and hypoxia-responsive nanocarriers therefore represent a promising advancement for treating bone metastasis. To our best knowledge, it might be the first example of the application of hypoxia-responsive nanocarriers in treating bone metastasis.
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Affiliation(s)
- Mengmeng Long
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China
| | - Xuemeng Liu
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China
| | - Xu Huang
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China
| | - Min Lu
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China
| | - Xiaomei Wu
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China
| | - Lingyan Weng
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China
| | - Qiuping Chen
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, People's Republic of China
| | - Xueting Wang
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China.
| | - Li Zhu
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China.
| | - Zhongping Chen
- Institute of Special Environmental Medicine, Nantong University, Nantong, People's Republic of China.
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Hanna R, Dalvi S, Amaroli A, De Angelis N, Benedicenti S. Effects of photobiomodulation on bone defects grafted with bone substitutes: A systematic review of in vivo animal studies. JOURNAL OF BIOPHOTONICS 2021; 14:e202000267. [PMID: 32857463 DOI: 10.1002/jbio.202000267] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/23/2020] [Accepted: 08/25/2020] [Indexed: 06/11/2023]
Abstract
A present, photobiomodulation therapy (PBMT) effectiveness in enhancing bone regeneration in bone defects grafted with or without biomaterials is unclear. This systematic review (PROSPERO, ref. CRD 42019148959) aimed to critically appraise animal in vivo published data and present the efficacy of PBMT and its potential synergistic effects on grafted bone defects. MEDLINE, CCCT, Scopus, Science Direct, Google Scholar, EMBASE, EBSCO were searched, utilizing the following keywords: bone repair; low-level laser therapy; LLLT; light emitting diode; LEDs; photobiomodulation therapy; in vivo animal studies, bone substitutes, to identify studies between 1994 and 2019. After applying the eligibility criteria, 38 papers included where the results reported according to "PRISMA." The results revealed insufficient and incomplete PBM parameters, however, the outcomes with or without biomaterials have positive effects on bone healing. In conclusion, in vivo animal studies with a standardized protocol to elucidate the effects of PBMT on biomaterials are required initially prior to clinical studies.
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Affiliation(s)
- Reem Hanna
- Department of Surgical Sciences and Integrated Diagnostics, Laser Therapy Centre, University of Genoa, Genoa, Italy
- Department of Oral Surgery, King's College Hospital NHS Foundation Trust, London, UK
| | - Snehal Dalvi
- Department of Surgical Sciences and Integrated Diagnostics, Laser Therapy Centre, University of Genoa, Genoa, Italy
- Department of Periodontology, Swargiya Dadasaheb Kalmegh Smruti Dental College and Hospital, Nagpur, India
| | - Andrea Amaroli
- Department of Orthopaedic Dentistry, First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
| | - Nicola De Angelis
- Department of Surgical Sciences and Integrated Diagnostics, Laser Therapy Centre, University of Genoa, Genoa, Italy
- Faculty of Dentistry, University of Technology MARA Sungai Buloh, Shah Alam, Malaysia
| | - Stefano Benedicenti
- Department of Surgical Sciences and Integrated Diagnostics, Laser Therapy Centre, University of Genoa, Genoa, Italy
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Photo biostimulatory effect of low dose photodynamic therapy on human mesenchymal stem cells. Photodiagnosis Photodyn Ther 2020; 31:101886. [PMID: 32574798 DOI: 10.1016/j.pdpdt.2020.101886] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/03/2020] [Accepted: 06/12/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND Tissue engineering is one treatment to regenerate bone . Stem cell proliferation or differentiation can be stimulated by adjunctive approaches like photobiomodulation. Some studies suggested that, photodynamic therapy with low concentration of photosensitizers can stimulate cell differentiation as a photobiomodulation approach. METHODS Human bone marrow mesenchymal stem cell was isolated and then cultured in sterile medium. Two photosensitizer drugs as 5- aminolevulenic acid (1 mM) (5-ALA) and Methylene blue (1μM) (MB) were used in incubation culture media. In order to activate the photosensitizers, 630 and 660 nm wavelengths were irradiated with 1 J/cm2 energy density, respectively. Cell viability was assessed using MTT assay before and after laser irradiation, and also Alizarin red histologic test was used for calcium nodule formation. RESULTS performing the MTT test before irradiation showed that, the optimum concentrations were 1 mM for 5-ALA and 1μM for MB that were optimized. After laser irradiation, ALA group showed no osseous differentiation. In contrast, there was a significant calcium nodule formation in MB group compared with the control one. CONCLUSIONS Photodynamic therapy with low photosensitizer concentration and low doses of laser energy density may improve osteogenic differentiation. Accordingly, MB had stimulatory effect on bone marrow derived mesenchymal stem cells. However, 5-ALA did not show this effect.
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Hosseinpour S, Fekrazad R, Arany PR, Ye Q. Molecular impacts of photobiomodulation on bone regeneration: A systematic review. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2019; 149:147-159. [PMID: 31002851 DOI: 10.1016/j.pbiomolbio.2019.04.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/16/2019] [Indexed: 12/13/2022]
Abstract
Photobiomodulation (PBM) encompasses a light application aimed to increase healing process, tissue regeneration, and reducing inflammation and pain. PBM is specifically aimed to modify the expression of cellular molecules; however, PBM impacts on cellular and molecular pathways especially in bone regenerative medicine have been investigated in scattered different studies. The purpose of the current study is to systematically review evidence on molecular impact of PBM on bone regeneration. A comprehensive electronic search in Medline, Scopus, EMBASE, EBSCO, Cochrane library, web of science, and google scholar was conducted from January 1975 to October 2018 limited to English language publications on administrations of photobiomodulation for bone regeneration which evaluated biological factors. In addition, hand search of selected journals was done to retrieve all articles. This systematic review was performed based on PRISMA guideline. Among these studies, five articles reported in vitro results, twelve articles were in vivo, and three of them were clinical trials. The data tabulated according to the type of markers (osteogenic markers, angiogenic markers, growth factors, and inflammation mediators). PBM's effects depend on many parameters which energy density is more important than the others. PBM can significantly enhance expression of osteocalcin, collagen, RUNX-2, vascular endothelial growth factor, bone morphogenic proteins, and COX-2. Although since the heterogeneity of the studies and their limitations, an evidence-based decision for definite therapeutic application of PBM is still unattainable, the findings of our review can help other researchers to ameliorate their study design and elect more efficient approach for their investigation.
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Affiliation(s)
- Sepanta Hosseinpour
- School of Dentistry, The University of Queensland, Brisbane, Queensland 4006, Australia; Department of Periodontology, Dental Faculty - Laser Research Center in Medical Sciences, AJA University of Medical Sciences, 19839, Fatemi, Tehran, Iran.
| | - Reza Fekrazad
- Department of Periodontology, Dental Faculty - Laser Research Center in Medical Sciences, AJA University of Medical Sciences, 19839, Fatemi, Tehran, Iran; International Network for Photo Medicine and Photo Dynamic Therapy (INPMPDT), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Praveen R Arany
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, The State University of New York, NY, 14214, USA.
| | - Qingsong Ye
- School of Dentistry, The University of Queensland, Brisbane, Queensland 4006, Australia.
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Mikhail FF, El-Din M, Ibrahim T, Zekry K, Nemat A, Nasry S. Effect of Laser Therapy on the Osseointegration of Immediately Loaded Dental Implants in Patients under Vitamin C, Omega-3 and Calcium Therapy. Open Access Maced J Med Sci 2018; 6:1468-1474. [PMID: 30159079 PMCID: PMC6108810 DOI: 10.3889/oamjms.2018.291] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/24/2018] [Accepted: 07/03/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND: The use of laser therapy in the biostimulation of bone repair has been growing steadily. AIM: This study aimed to evaluate the radio-densitometric effect of low-intensity laser therapy on the osseointegration of immediately loaded dental implants in patients under vitamin C, omega-3 and calcium therapy. PATIENTS AND METHODS: A single implant was placed in the mandibular first molar region of twenty patients which were equally divided into two groups. In the non-laser group, the healing phase was left to progress spontaneously without any intervention, while in the laser group it was augmented with low-level laser therapy of wavelength 904 nm in contact mode, continuous wave, 20 mW output power and exposure time 30 sec with a dose 4.7 J/cm2. Patients in both groups were given vitamin C, calcium and omega-3 starting one month preoperatively. Postoperative digital panoramas were taken immediately after surgery, 1.5 months and 6 months postoperatively. Changes in bone density along the bone-implant interface at the mesial, distal and apical sides were assessed using the Digora software. RESULTS: Independent student t-test was used to compare means of variables between the laser and the non-laser group while repeated measures ANOVA was used to compare bone densities at different times for the same group. Significant increased differences were observed at the mesial, distal and apical sides surrounding the implants of both groups per time. However, the rate of increase was significantly higher in the laser group. The mean difference at the mesial side after 6 months was 21.99 ± 5.48 in the laser group and 14.21 ± 4.95 in the non-laser group, while it read 21.74 ± 3.56 in the laser group and 10.78 ± 3.90 in non-laser group at the distal side and was 18.90 ± 5.91 in the laser group and 10.39 ± 3.49 in non-laser group at the apical side. Significance was recorded at P = 0.004, P = 0.0001, and 0.001 at the mesial, distal and apical sides respectively. CONCLUSION: The low-intensity laser irradiation significantly promoted bone healing and speeded up the osseointegration process emphasising the laser’s biostimulatory effect.
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Affiliation(s)
- Faten Fawzy Mikhail
- Department of Surgery and Oral Medicine, National Research Centre, Cairo, Egypt
| | - Mouchira El-Din
- Periodontology and Oral Radiology, Department of Oral Medicine, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| | - Tarek Ibrahim
- Department of Medical Laser Application, National Institute of Laser Enhanced Sciences, Cairo University, Cairo, Egypt
| | - Khaled Zekry
- Periodontology and Oral Radiology, Department of Oral Medicine, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| | - Amany Nemat
- Department of Surgery and Oral Medicine, National Research Centre, Cairo, Egypt
| | - Sherine Nasry
- Department of Surgery and Oral Medicine, National Research Centre, Cairo, Egypt
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Merigo E, Cella L, Oppici A, Cristina Arbasi M, Clini F, Fontana M, Fornaini C. Combined Approach to Treat Medication-Related Osteonecrosis of the Jaws. J Lasers Med Sci 2018; 9:92-100. [PMID: 30026893 DOI: 10.15171/jlms.2018.19] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction: The proper therapeutic plan for medication-related osteonecrosis of the Jaw (MRONJ) is still lacking long-term data up to today. They were several high-technological appliances proposed for the different intervention steps, in addition to tissue repair promoters. The reason for proposing an integrated technique is justified, beyond better compliance of the patients associated to the pain and inflammation reduction and bleeding control, there is also achieving better hard and soft tissues healing. Methods: Patients diagnosed with bisphosphonates-related osteonecrosis of the jaws (BRONJ) at the Odontostomatology and Maxillo-Facial Surgery Unit of the Hospital of Piacenza undergone surgical intervention. The intervention was performed by using different devices: Piezosurgery for removing the necrotic bone tissue and for obtaining the bone specimen essential for histological analysis; Er:YAG laser (2940 nm) to vaporize necrotic hard tissue until reaching the bleeding bone; platelet-rich plasma (PRP) to stimulate hard and soft tissue healing; and finally diode laser (808 nm) to perform a biostimulation of the surgical site. Results: All treated patients demonstrated a good postoperative comfort even without using painkillers, no bleeding, and a fast healing process. Most of the patients (92.85%) reached complete healing with a minimum follow up at 6 months. Histological exams demonstrated a good quality without artifacts. Conclusion: Sequential utilization of different high-technologies devices during all the steps of MRONJ treatment allows to perform a faster and less invasive surgery with a more comfortable postoperative healing process and it may represent a new and original approach for treating this severe adverse event.
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Affiliation(s)
- Elisabetta Merigo
- MICORALIS Laboratory EA7354, Faculty of Dentistry, Université "Côte d'Azur", 24 Avenue des Diables Bleus, 06357 Nice, France.,Odontostomatology and Maxillo-Facial Surgery Unit - "Special care dentistry", "Guglielmo da Saliceto" Hospital - Via Taverna, 10 - 29100, Piacenza, Italy
| | - Luigi Cella
- Odontostomatology and Maxillo-Facial Surgery Unit - "Special care dentistry", "Guglielmo da Saliceto" Hospital - Via Taverna, 10 - 29100, Piacenza, Italy
| | - Aldo Oppici
- Odontostomatology and Maxillo-Facial Surgery Unit - "Special care dentistry", "Guglielmo da Saliceto" Hospital - Via Taverna, 10 - 29100, Piacenza, Italy
| | - Maria Cristina Arbasi
- Immunohematology and Transfusion Medicine "Guglielmo da Saliceto" Hospital - via Taverna, 10 - 29100, Piacenza, Italy
| | - Fabio Clini
- Odontostomatology and Maxillo-Facial Surgery Unit - "Special care dentistry", "Guglielmo da Saliceto" Hospital - Via Taverna, 10 - 29100, Piacenza, Italy
| | - Matteo Fontana
- Odontostomatology and Maxillo-Facial Surgery Unit - "Special care dentistry", "Guglielmo da Saliceto" Hospital - Via Taverna, 10 - 29100, Piacenza, Italy
| | - Carlo Fornaini
- MICORALIS Laboratory EA7354, Faculty of Dentistry, Université "Côte d'Azur", 24 Avenue des Diables Bleus, 06357 Nice, France.,Odontostomatology and Maxillo-Facial Surgery Unit - "Special care dentistry", "Guglielmo da Saliceto" Hospital - Via Taverna, 10 - 29100, Piacenza, Italy
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13
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Mikami R, Mizutani K, Aoki A, Tamura Y, Aoki K, Izumi Y. Low-level ultrahigh-frequency and ultrashort-pulse blue laser irradiation enhances osteoblast extracellular calcification by upregulating proliferation and differentiation via transient receptor potential vanilloid 1. Lasers Surg Med 2017; 50:340-352. [PMID: 29214666 DOI: 10.1002/lsm.22775] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2017] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND OBJECTIVE Low-level laser irradiation (LLLI) exerts various biostimulative effects, including promotion of wound healing and bone formation; however, few studies have examined biostimulation using blue lasers. The purpose of this study was to investigate the effects of low-level ultrahigh-frequency (UHF) and ultrashort-pulse (USP) blue laser irradiation on osteoblasts. STUDY DESIGN/ MATERIALS AND METHODS The MC3T3-E1 osteoblast cell line was used in this study. Following LLLI with a 405 nm newly developed UHF-USP blue laser (80 MHz, 100 fs), osteoblast proliferation, and alkaline phosphatase (ALP) activity were assessed. In addition, mRNA levels of the osteoblast differentiation markers, runt-related transcription factor 2 (Runx2), osterix (Osx), alkaline phosphatase (Alp), and osteopontin (Opn) was evaluated, and extracellular calcification was quantified. To clarify the involvement of transient receptor potential (TRP) channels in LLLI-induced biostimulation, cells were treated prior to LLLI with capsazepine (CPZ), a selective inhibitor of TRP vanilloid 1 (TRPV1), and subsequent proliferation and ALP activity were measured. RESULTS LLLI with the 405 nm UHF-USP blue laser significantly enhanced cell proliferation and ALP activity, compared with the non-irradiated control and LLLI using continuous-wave mode, without significant temperature elevation. LLLI promoted osteoblast proliferation in a dose-dependent manner up to 9.4 J/cm2 and significantly accelerated cell proliferation in in vitro wound healing assay. ALP activity was significantly enhanced at doses up to 5.6 J/cm2 , and expression of Osx and Alp mRNAs was significantly increased compared to that of the control on days 3 and 7 following LLLI at 5.6 J/cm2 . The extent of extracellular calcification was also significantly higher as a result of LLLI 3 weeks after the treatment. Measurement of TRPV1 protein expression on 0, 3, and 7 days post-irradiation revealed no differences between the LLLI and control groups; however, promotion of cell proliferation and ALP activity by LLLI was significantly inhibited by CPZ. CONCLUSION LLLI with a 405 nm UHF-USP blue laser enhances extracellular calcification of osteoblasts by upregulating proliferation and differentiation via TRPV1. Lasers Surg. Med. 50:340-352, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Risako Mikami
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Koji Mizutani
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Akira Aoki
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yukihiko Tamura
- Department of Bio-Matrix (Pharmacology), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kazuhiro Aoki
- Department of Basic Oral Health Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Mostafavinia A, Ahadi R, Abdollahifar M, Ghorishi SK, Jalalifirouzkouhi A, Bayat M. Evaluation of the Effects of Photobiomodulation on Biomechanical Properties and Hounsfield Unit of Partial Osteotomy Healing in an Experimental Rat Model of Type I Diabetes and Osteoporosis. Photomed Laser Surg 2017; 35:520-529. [DOI: 10.1089/pho.2016.4191] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Ataroalsadat Mostafavinia
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Ahadi
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammadamin Abdollahifar
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | | | - Mohammad Bayat
- Celluar and Molecular Biology Research Centre, and Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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15
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Zaky AA, El Shenawy HMM, Harhsh TAH, Shalash M, Awad NMI. Can Low Level Laser Therapy Benefit Bone Regeneration in Localized Maxillary Cystic Defects? - A Prospective Randomized Control Trial. Open Access Maced J Med Sci 2016; 4:720-725. [PMID: 28028422 PMCID: PMC5175530 DOI: 10.3889/oamjms.2016.140] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Revised: 11/24/2016] [Accepted: 11/26/2016] [Indexed: 01/15/2023] Open
Abstract
AIM: The aim of the study was to evaluate the effect of Low-Level Laser Therapy (LLLT) on bone formation in cystic defects following cyst enucleation. PATIENTS AND METHODS: The sample was composed of sixteen patients with enucleated maxillary bony cystic lesions. With an age range from 20 - 44 grouped as eight Laser and eight Control patients. Laser group was subjected to low intensity diode laser immediately after surgery and then for three times per week for two weeks using a therapeutic laser irradiation. Group B (control group): patients were not subjected laser therapy. RESULTS: The predictor variable was exposure of bone defect to LLLT or none. The outcome variable was bone density changes measured by digital radiographs at day 1 and days 90 postoperatively. Descriptive and bivariate statistics were computed. There were no statistically significant differences between the 2 groups for the bone density at day 1. There was a statistically significant difference in bone density changes in each group at day 90: Significant at P ≤ 0.05. After adjusting for differences in day 1 for bone density, the estimated mean change in bone density changes at day 90 was significantly larger for Laser compared with control. CONCLUSION: The results of this study suggested that LLLT can enhance bone healing in maxillary cystic defects. This can serve as an adjunct method in preventing possible delayed healing and pathological fractures This also will be helpful for more researchers in early loading in case of dental implants to accelerate osseointegration.
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Affiliation(s)
- Ahmed Abbas Zaky
- National Institute of Laser Enhanced Sciences, Cairo University, Cairo, Egypt
| | | | | | - Mahmoud Shalash
- Oral Surgery and Medicine Department, National Research Center, Cairo, Egypt
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16
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Suzuki SS, Garcez AS, Suzuki H, Ervolino E, Moon W, Ribeiro MS. Low-level laser therapy stimulates bone metabolism and inhibits root resorption during tooth movement in a rodent model. JOURNAL OF BIOPHOTONICS 2016; 9:1222-1235. [PMID: 27647761 DOI: 10.1002/jbio.201600016] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 07/06/2016] [Accepted: 08/22/2016] [Indexed: 05/25/2023]
Abstract
This study evaluated the biological effects of low-level laser therapy (LLLT) on bone remodeling, tooth displacement and root resorption, occurred during the orthodontic tooth movement. Upper first molars of a total of sixty-eight male rats were subjected to orthodontic tooth movement and euthanized on days 3, 6, 9, 14 and 21 days and divided as negative control, control and LLLT group. Tooth displacement and histomorphometric analysis were performed in all animals; scanning electron microscopy analysis was done on days 3, 6 and 9, as well as the immunohistochemistry analysis of RANKL/OPG and TRAP markers. Volumetric changes in alveolar bone were analyzed using MicroCT images on days 14 and 21. LLLT influenced bone resorption by increasing the number of TRAP-positive osteoclasts and the RANKL expression at the compression side. This resulted in less alveolar bone and hyalinization areas on days 6, 9 and 14. LLLT also induced less bone volume and density, facilitating significant acceleration of tooth movement and potential reduction in root resorption besides stimulating bone formation at the tension side by enhancing OPG expression, increasing trabecular thickness and bone volume on day 21. Taken together, our results indicate that LLLT can stimulate bone remodeling reducing root resorption in a rat model. LLLT improves tooth movement via bone formation and bone resorption in a rat model.
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Affiliation(s)
- Selly Sayuri Suzuki
- CLA - Center for Laser and Applications, Nuclear and Energy Research Institute, IPEN-CNEN/SP, Brazil
| | - Aguinaldo Silva Garcez
- Department of Microbiology, São Leopoldo Mandic School and Dental Institute, Campinas, SP, Brazil
| | - Hideo Suzuki
- Department of Orthodontics, São Leopoldo Mandic School and Dental Institute, Campinas, SP, Brazil
| | - Edilson Ervolino
- Department of Basic Science and Embryology and Histology, Dental School of Araçatuba - UNESP, Brazil
| | - Won Moon
- Section of Orthodontics, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Martha Simões Ribeiro
- CLA - Center for Laser and Applications, Nuclear and Energy Research Institute, IPEN-CNEN/SP, Brazil
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17
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Decreased Bone Volume and Bone Mineral Density in the Tibial Trabecular Bone Is Associated with Per2 Gene by 405 nm Laser Stimulation. Int J Mol Sci 2015; 16:27401-10. [PMID: 26580614 PMCID: PMC4661886 DOI: 10.3390/ijms161126028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 11/07/2015] [Accepted: 11/10/2015] [Indexed: 11/18/2022] Open
Abstract
Low-level laser therapy/treatment (LLLT) using a minimally invasive laser needle system (MILNS) might enhance bone formation and suppress bone resorption. In this study, the use of 405 nm LLLT led to decreases in bone volume and bone mineral density (BMD) of tibial trabecular bone in wild-type (WT) and Per2 knockout (KO) mice. Bone volume and bone mineral density of tibial trabecular bone was decreased by 405 nm LLLT in Per2 KO compared to WT mice at two and four weeks. To determine the reduction in tibial bone, mRNA expressions of alkaline phosphatase (ALP) and Per2 were investigated at four weeks after 405 nm laser stimulation using MILNS. ALP gene expression was significantly reduced in the LLLT-stimulated right tibial bone of WT and Per2 KO mice compared to the non-irradiated left tibia (p < 0.001). Per2 mRNA expression in WT mice was significantly reduced in the LLLT-stimulated right tibial bone compared to the non-irradiated left tibia (p < 0.001). To identify the decrease in tibial bone mediated by the Per2 gene, levels of runt-related transcription factor 2 (Runx2) and ALP mRNAs were determined in non-irradiated WT and Per2 KO mice. These results demonstrated significant downregulation of Runx2 and ALP mRNA levels in Per2 KO mice (p < 0.001). Therefore, the reduction in tibial trabecular bone resulting from 405 nm LLLT using MILNS might be associated with Per2 gene expression.
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18
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Porcaro G, Amosso E, Scarpella R, Carini F. Doxycycline fluorescence-guided Er:YAG laser ablation combined with Nd:YAG/diode laser biostimulation for treating bisphosphonate-related osteonecrosis of the jaw. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 119:e6-e12. [DOI: 10.1016/j.oooo.2014.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 04/02/2014] [Accepted: 04/23/2014] [Indexed: 10/25/2022]
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19
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Effect of Frequent Application of Low-Level Laser Therapy on Corticotomized Tooth Movement in Dogs: A Pilot Study. J Oral Maxillofac Surg 2014; 72:1182.e1-12. [DOI: 10.1016/j.joms.2014.02.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 02/14/2014] [Accepted: 02/14/2014] [Indexed: 11/17/2022]
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20
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Marques L, Holgado LA, Francischone LA, Ximenez JPB, Okamoto R, Kinoshita A. New LLLT protocol to speed up the bone healing process—histometric and immunohistochemical analysis in rat calvarial bone defect. Lasers Med Sci 2014; 30:1225-30. [DOI: 10.1007/s10103-014-1580-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 04/11/2014] [Indexed: 10/25/2022]
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21
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Kang H, Son T, Lee A, Youn I, Seo DH, Kim HS, Jung B. The effects of a minimally invasive laser needle system on complete Freund’s adjuvant-induced arthritis. Lasers Med Sci 2014; 29:1599-606. [DOI: 10.1007/s10103-014-1555-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 02/20/2014] [Indexed: 11/30/2022]
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22
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Chang CC, Ku CH, Hsu WC, Hu YA, Shyu JF, Chang ST. Five-day, low-level laser therapy for sports-related lower extremity periostitis in adult men: a randomized, controlled trial. Lasers Med Sci 2014; 29:1485-94. [PMID: 24622816 DOI: 10.1007/s10103-014-1554-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 02/20/2014] [Indexed: 11/24/2022]
Abstract
Periostitis in the lower leg caused by overexercise is a universal problem in athletes and runners. The purpose of this study was to observe the functional improvement of the lower limbs upon rehabilitation low-level laser therapy (LLLT). All medical data were gathered from enrolled adults with sports-related lower leg pain. A total of 54 patients underwent triple-phase bone scans using skeletal nuclear scintigraphy, which confirmed periostitis in their lower limbs. The patients were then randomly divided into two groups: one group received laser therapy (N = 29) and the other group (N = 25) received an equivalent placebo treatment (a drug or physical therapy). Treatment protocol commenced with rehabilitation intervention and LLLT was performed three times daily for 5 days at a dosage of 1.4 J/cm(2). A Likert-type pain scale was used to evaluate the severity of pain. Balance function, including postural stability testing (PST) and limits of stability (LOS), was also performed to evaluate the function outcome. Patients experienced a significant improvement in pain by day 2 or day 5 after starting LLLT, but here was no significant difference in pain scale between the measurements before (baseline) and after LLLT. Comparing the PST, the group differences of dynamic vs. static testings ranged from -18.54 to -50.22 (compared 12, 8, 4, 3, 2, 1 to 0, all p < 0.0001), and the PST after LLLT were 3.73 units (p = 0.0258) lower than those of before LLLT. Comparing the LOS, the group differences of dynamic vs. static testing were similar to those in PST, and the relationship between LOS and groups only varied with the direction control during dynamic testing in direction at backward/right vs. right (p < 0.0001). LLLT had a positive effect on proprioception in patients with lower limb periostitis. Larger, better controlled studies are needed to determine what specific effects LLLT has on the function of proprioception.
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Affiliation(s)
- Cheng-Chiang Chang
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
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23
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Pavone C, Perussi LR, de Oliveira GJPL, Scardueli CR, Cirelli JA, Cerri PS, Junior EM, Spolidorio LC, Marcantonio RAC. Effect of Er,Cr:YSGG laser application in the treatment of experimental periodontitis. Lasers Med Sci 2014; 30:993-9. [PMID: 24477391 DOI: 10.1007/s10103-014-1526-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 01/13/2014] [Indexed: 11/24/2022]
Abstract
The purpose of this study was to evaluate the influence of an erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser in the absence or presence of manual scaling and root planning (SRP) for the treatment of induced periodontitis in rats. Ligatures were placed in the subgingival region of the maxillary first molar. After a 7-day period, the ligatures were removed, and 40 rats were randomly divided into four groups (G), as follows: (GI) no treatment, (GII) scaling and root planning (SRP) with curettes, (GIII) Er,Cr:YSGG laser irradiation and (GIV) SRP with curettes followed by Er,Cr:YSGG laser irradiation. Seven and 30 days after the treatment, the animals were sacrificed and histologic, histometric and immunohistochemistry analyses were performed. All groups showed similar histopathological characteristics during the evaluation period. The histometric analysis was confirmed using Bonferroni and paired t tests. At 7 and 30 days, groups II, III and IV exhibited greater bone formation in the furcation area when compared to group I (p < 0.0001; p < 0.05). During the 7-day period, the groups irradiated with the laser (III and IV) showed a statistically larger new bone area than the group treated with SRP (II) (p < 0.01). Immunohistochemistry analysis revealed that the control group exhibited a higher expression of tartrate-resistant acid phosphatase (TRAP) and the receptor activator of nuclear factor κΒ ligand (RANKL) when compared to groups II, III and IV (p < 0.05). All treatments were able to reduce the inflammatory processes, consequently enabling the repair of periodontal tissues. The results achieved with the application of the Er,Cr:YSGG laser suggest that this laser can stimulate greater bone formation, especially over a shorter period of time.
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Affiliation(s)
- Chaine Pavone
- Araraquara Dental School-São Paulo State University "Júlio de Mesquita Filho", Araraquara, São Paulo, Brazil
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Kim K, Kim IS, Cho TH, Seo YK, Hwang SJ. High-intensity Nd:YAG laser accelerates bone regeneration in calvarial defect models. J Tissue Eng Regen Med 2013; 9:943-51. [DOI: 10.1002/term.1845] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 07/03/2013] [Accepted: 09/26/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Kwansik Kim
- New York Seoul Dental Hospital; Seoul Republic of Korea
| | - In Sook Kim
- Dental Research Institute; Seoul National University; Seoul Republic of Korea
| | - Tae Hyung Cho
- Dental Research Institute; Seoul National University; Seoul Republic of Korea
| | - Young-Kwon Seo
- Department of Chemical and Biochemical Engineering; Dongguk University; Seoul Republic of Korea
| | - Soon Jung Hwang
- Dental Research Institute; Seoul National University; Seoul Republic of Korea
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University; Brain Korea 21 Program for Leading Universities and Students; Seoul Republic of Korea
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Lim HJ, Bang MS, Jung HM, Shin JI, Chun GS, Oh CH. A 635-nm light-emitting diode (LED) therapy inhibits bone resorptive osteoclast formation by regulating the actin cytoskeleton. Lasers Med Sci 2013; 29:659-70. [PMID: 23812848 DOI: 10.1007/s10103-013-1363-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 05/28/2013] [Indexed: 11/26/2022]
Abstract
Bone diseases such as osteoporosis are mainly caused by upregulated activity of osteoclasts. The present study was designed to examine the effects of light-emitting diode (LED) irradiation on the formation and activity of multinucleated osteoclasts, specifically "round-shaped" osteoclast cells (ROC) in different cell types derived from mouse. After 635-nm LED irradiation, the cell viability was evaluated by MTT assay. The amount of total tartrate-resistant acid phosphatase (TRAP) + osteoclast and the number of ROC cells were also estimated by TRAP solution assay and TRAP staining, respectively. Actin rings were stained with rhodamine-conjugated phalloidin, and resorption assay was performed by dentin slices. In addition, gene expression levels between the control and irradiation groups were evaluated by RT-PCR. In a morphological analysis, the formation of ROC was significantly inhibited by 635-nm LED irradiation in the different cell types. Actin rings were seen at cell peripheries in most ROC cells of the control group, but patches containing disorganized actin were found in the irradiation group. Both the number of ROCs and bone resorption activity were much lower in the irradiation group than in the control group. Also, the gene expression levels involved in actin ring formation such as integrin β3 and c-Src decreased in RT-PCR analysis. Overall, 635-nm LED therapy may play a pivotal role in regulating bone remodeling, and it may prove to be a valuable tool to prevent bone loss in osteoporosis and other resorptive bone diseases.
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Affiliation(s)
- Hyun-Ju Lim
- Department of Medical Laser, Graduate school, Dankook University, Cheonan, 330-714, South Korea
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Huertas RM, Luna-Bertos ED, Ramos-Torrecillas J, Leyva FM, Ruiz C, García-Martínez O. Effect and clinical implications of the low-energy diode laser on bone cell proliferation. Biol Res Nurs 2013; 16:191-6. [PMID: 23559459 DOI: 10.1177/1099800413482695] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Laser is a simple, noninvasive technique that has proven useful for treating damaged tissue. However, its effects on bone regeneration and the mechanisms involved are poorly understood. The objective of this study was to evaluate the effects on MG-63 cell proliferation of application of a pulsed diode laser (Ezlase) of 940 nm at low energy levels. After 24 hr of culture, osteoblasts underwent pulsed laser radiation at 0.5, 1, 1.5, and 2 W and fluences of 1-5 J. A control group was not irradiated. After the treatment, cells were incubated for 24 hr, and cell proliferation was analyzed using a spectrophotometric measure of cell respiration (MTT assay). Results were expressed as percentage proliferation versus controls. At 24-hr culture, cell proliferation was increased in laser-treated cells at intensities of 0.5, 1, and 1.5 W/cm(2) versus controls; the energy density was positively correlated with cell growth, which reached a peak at 3 J and decreased at higher fluences. The use of pulsed low-level laser with low-energy density range thus appears to exert a biostimulatory effect on bone tissue. Although the data on cell proliferation are robust, in-depth investigation is required into the effect of these irradiation doses on other cell parameters. The present findings demonstrate that laser therapy could be highly useful in tissue regeneration in different clinical settings, including nursing, physical therapy, dentistry, and traumatology.
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Affiliation(s)
- Rosa Medina Huertas
- 1Biomedical Group (BIO277), Department of Nursing, Faculty of Health Sciences, University of Granada, Granada, Spain
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Koide M, Kobayashi Y, Ninomiya T, Nakamura M, Yasuda H, Arai Y, Okahashi N, Yoshinari N, Takahashi N, Udagawa N. Osteoprotegerin-deficient male mice as a model for severe alveolar bone loss: comparison with RANKL-overexpressing transgenic male mice. Endocrinology 2013; 154:773-82. [PMID: 23291450 DOI: 10.1210/en.2012-1928] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Periodontitis, an inflammatory disease of periodontal tissues, is characterized by excessive alveolar bone resorption. An increase in the receptor activator of nuclear factor-κB ligand (RANKL) to osteoprotegerin (OPG) ratio is thought to reflect the severity of periodontitis. Here, we examined alveolar bone loss in OPG-deficient (OPG(-/-)) mice and RANKL-overexpressing transgenic (RANKL-Tg) mice. Alveolar bone loss in OPG(-/-) mice at 12 weeks was significantly higher than that in RANKL-Tg mice. OPG(-/-) but not RANKL-Tg mice exhibited severe bone resorption especially in cortical areas of the alveolar bone. An increased number of osteoclasts was observed in the cortical areas in OPG(-/-) but not in RANKL-Tg mice. Immunohistochemical analyses showed many OPG-positive signals in osteocytes but not osteoblasts. OPG-positive osteocytes in the cortical area of alveolar bones and long bones were abundant in both wild-type and RANKL-Tg mice. This suggests the resorption in cortical bone areas to be prevented by OPG produced locally. To test the usefulness of OPG(-/-) mice as an animal model for screening drugs to prevent alveolar bone loss, we administered an antimouse RANKL antibody or risedronate, a bisphosphonate, to OPG(-/-) mice. They suppressed alveolar bone resorption effectively. OPG(-/-) mice are useful for screening therapeutic agents against alveolar bone loss.
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Affiliation(s)
- Masanori Koide
- Institute for Oral Science, Matsumoto Dental University, Nagano 399-0781, Japan
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Ko CY, Kang H, Ryu Y, Jung B, Kim H, Jeong D, Shin HI, Lim D, Kim HS. The effects of minimally invasive laser needle system on suppression of trabecular bone loss induced by skeletal unloading. Lasers Med Sci 2013; 28:1495-502. [PMID: 23324954 DOI: 10.1007/s10103-013-1265-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022]
Abstract
This study was aimed to evaluate the effects of low-level laser therapy (LLLT) in the treatment of trabecular bone loss induced by skeletal unloading. Twelve mice have taken denervation operation. At 2 weeks after denervation, LLLT (wavelength, 660 nm; energy, 3 J) was applied to the right tibiae of 6 mice (LASER) for 5 days/week over 2 weeks by using a minimally invasive laser needle system (MILNS) which consists of a 100 μm optical fiber in a fine needle (diameter, 130 μm) [corrected]. Structural parameters and histograms of bone mineralization density distribution (BMDD) were obtained before LLLT and at 2 weeks after LLLT. In addition, osteocyte, osteoblast, and osteoclast populations were counted. Two weeks after LLLT, bone volume fraction, trabeculae number, and trabeculae thickness were significantly increased and trabecular separations, trabecular bone pattern factor, and structure model index were significantly decreased in LASER than SHAM (p < 0.05). BMDD in LASER was maintained while that in SHAM was shifted to lower mineralization. Osteocyte and osteoblast populations were significantly increased but osteoclast population was significantly decreased in LASER when compared with those in SHAM (p < 0.05). The results indicate that LLLT with the MILNS may enhance bone quality and bone homeostasis associated with enhancement of bone formation and suppression of bone resorption.
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Affiliation(s)
- Chang-Yong Ko
- Research Team, Korea Orthopedics and Rehabilitation Engineering Center, Incheon, 403-712, Republic of Korea
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Ko CY, Kang H, Seo DH, Jung B, Schreiber J, Kim HS. Low-level laser therapy using the minimally invasive laser needle system on osteoporotic bone in ovariectomized mice. Med Eng Phys 2012; 35:1015-9. [PMID: 23127900 DOI: 10.1016/j.medengphy.2012.10.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 09/13/2012] [Accepted: 10/03/2012] [Indexed: 11/15/2022]
Abstract
This study tested the effectiveness of low-level laser therapy (LLLT) in preventing and/or treating osteoporotic trabecular bone. Mice were ovariectomized (OVX) to induce osteoporotic bone loss. The tibiae of eight OVX mice were treated for 5 days each week for 2 weeks by LLLT (660 nm, 3 J) using a minimally invasive laser needle system (MILNS) which is designed to minimize loss of laser energy before reaching bone (LASER group). Another eight mice received a sham treatment (SHAM group). Structural parameters of trabecular bone were measured with in vivo micro-computed tomography images before and after laser treatment. After LLLT for 2 weeks, the percentage reduction (%R) was significantly lower in BV/TV (bone volume fraction) and Tb.N (trabecular number, p<0.05 and p<0.05) and significant higher in Tb.Sp (trabecular separation) and SMI (structure model index, p<0.05 and p<0.05) than in the SHAM group. The %R in BV/TV at sites directly treated by LLLT was significantly lower in the LASER group than the SHAM group (p<0.05, p<0.05). These results indicated that LLLT using MILNS may be effective for preventing and/or treating trabecular bone loss and the effect may be site-dependent in the same bone.
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Affiliation(s)
- Chang-Yong Ko
- Department of Biomedical Engineering and Yonsei-Fraunhofer Medical Device Lab, Yonsei University, Wonju, Gangwon 220-710, Republic of Korea
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Habib FAL, Gama SKC, Ramalho LMP, Cangussú MCT, dos Santos Neto FP, Lacerda JA, de Araújo TM, Pinheiro ALB. Effect of Laser Phototherapy on the Hyalinization Following Orthodontic Tooth Movement in Rats. Photomed Laser Surg 2012; 30:179-85. [DOI: 10.1089/pho.2011.3085] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Affiliation(s)
- Fernando A. L. Habib
- Centro de Ortodontia e Ortopedia Facial Prof. José Édimo Soares Martins, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
- Center of Biophotonics, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - Sabrina K. C. Gama
- Centro de Ortodontia e Ortopedia Facial Prof. José Édimo Soares Martins, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
- Center of Biophotonics, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - Luciana M. P. Ramalho
- Center of Biophotonics, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - Maria Cristina T. Cangussú
- Oral Epidemiology and Pediatric Dentistry, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | | | - Juliana A. Lacerda
- Center of Biophotonics, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - Telma M. de Araújo
- Centro de Ortodontia e Ortopedia Facial Prof. José Édimo Soares Martins, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
- Center of Biophotonics, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - Antônio L. B. Pinheiro
- Center of Biophotonics, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
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Kang H, Ko CY, Ryu Y, Seo DH, Kim HS, Jung B. Development of a minimally invasive laser needle system: effects on cortical bone of osteoporotic mice. Lasers Med Sci 2011; 27:965-9. [PMID: 22083368 DOI: 10.1007/s10103-011-1014-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2011] [Accepted: 10/06/2011] [Indexed: 10/15/2022]
Abstract
Many studies have shown the positive effects of low-level laser therapy in the treatment of bone disease. However, laser radiation is scattered in the skin surface which reduces the initial photon density for tissue penetration and consequently the therapeutic efficacy. We developed a minimally invasive laser needle system (MILNS) to avoid laser scattering in tissue and investigated its stimulatory effects in the cortical bone of osteoporotic mice. The MILNS was designed to stimulate cortical bone directly by employing fine hollow needles to guide 100 μm optical fibers. The study animals comprised 12 mice which were subjected to sciatic denervation of the right hind limb and were randomly divided into two groups, a sham group and a laser group which were treated using the MILNS for 2 weeks without and with laser irradiation, respectively. In vivo micro-CT images were taken to analyze the structural parameters and bone mineral density. After 2 weeks of treatment with the MILNS, the relative changes in mean polar moment inertia, cross-section thickness, and periosteal perimeter were significantly higher in the laser group than in the sham group. Moreover, the distribution of bone mineral density index was higher in the laser group. The MILNS was developed as a minimally invasive treatment modality for bone disease and resulted in positive therapeutic efficacy in the cortical bone of osteoporotic mice.
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Affiliation(s)
- Heesung Kang
- Department of Biomedical Engineering, Yonsei University, 234 Maeji-ri, Heungup-myun, Wonju-si, Gangwon-do, 220-710, Korea
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Huang TH, Lu YC, Kao CT. Low-level diode laser therapy reduces lipopolysaccharide (LPS)-induced bone cell inflammation. Lasers Med Sci 2011; 27:621-7. [PMID: 22002329 DOI: 10.1007/s10103-011-1006-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 09/26/2011] [Indexed: 11/26/2022]
Abstract
UNLABELLED In this study, the aim is to investigate the cytologic effects of inflammatory bone cells after in vitro low-level laser therapy (LLLT). A human osteosarcoma cell line (MG63) was cultured, infected with lipopolysaccharide (LPS) and exposed to low-level laser treatment at 5 or 10 J/cm(2) using a 920 nm diode laser. MG63 cell attachment was observed under a microscope, and cell viability was quantified by mitochondrial colorimetric assay (MTT). LPS-treated MG63 cells were irradiated with LLLT, and the inflammatory markers iNOS, TNF-α and IL-1, were analyzed by reverse transcription polymerase chain reaction (RT-PCR) and Western blot. The data were collected and analyzed by one-way analysis of variance (ANOVA); p < 0.05 indicated a statistically significant difference. Low-level laser treatment on MG63 cells increased their ability to attach and survive. After irradiation, the expression levels of iNOS, TNF-α and IL-1 in LPS-infected MG63 cells decreased over time (p < 0.05). CONCLUSIONS low-level diode laser treatment increased the MG63 cell proliferative ability and decreased the expression of inflammatory mediators in MG63 cells.
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Affiliation(s)
- Tsui Hsien Huang
- Graduate School of Dentistry, Chung Shan Medical University Hospital, Chung Shan Medical University, 110, section 1, Chien Kuo N Road, Taichung City, 40201, Taiwan
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Habib FAL, Gama SKC, Ramalho LMP, Cangussú MCT, Santos Neto FP, Lacerda JA, Araújo TM, Pinheiro ALB. Laser-induced alveolar bone changes during orthodontic movement: a histological study on rodents. Photomed Laser Surg 2011; 28:823-30. [PMID: 21142724 DOI: 10.1089/pho.2009.2732] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVE The aim of this study was to assess by light microscopy changes in alveolar bone during orthodontic movement in rats. BACKGROUND Orthodontic movement causes both removal and deposition of bone tissue. The use of laser phototherapy (LPT) is considered an enhancement factor for bone repair. METHODS Thirty Wistar rats were divided into two groups (n = 15) and subdivided according to animal death (7,13, and 19 days). Half of the animals in each group were treated with LPT during orthodontic movement. After animal death, specimens were processed and underwent histological and semi-quantitative analyses (HE and Sirius red). RESULTS LPT-irradiated specimens showed significantly higher numbers of osteoclasts when compared with controls at both 7 (p = 0.015) and 19 (p = 0.007) days, as well as significant increases in the number of osteoblasts (p = 0.015) between days 7 and 13. The amount of collagen matrix was significantly reduced between days 7 and 13 at both pressure and tension sites in controls (p = 0.015) but not in LPT-treated animals. LPT-treated subjects showed significantly greater deposition of collagen matrix at the pressure site at both the thirteenth (p = 0.007) and nineteenth days (p = 0.001). At the tension site, a significant increase in the amount of collagen matrix was observed in non-irradiated specimens (p = 0.048) between days 7 and 19. CONCLUSIONS LPT caused significant histological changes in the alveolar bone during induced tooth movement, including alterations in the number of both osteoclasts and osteoblasts and in collagen deposition in both pressure and tension areas.
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Affiliation(s)
- Fernando A L Habib
- Centro de Ortodontia e Ortopedia Facial Prof. José Edimo Soares Martins, School of Dentistry, Federal University of Bahia (UFBA), Salvador, Brazil
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Vescovi P, Romeo U, Merigo E, Del Vecchio A, Palaia G, Meleti M, Nammour S. L’impiego del laser nelle patologie delle ossa mascellari. DENTAL CADMOS 2011. [DOI: 10.1016/j.cadmos.2010.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ninomiya T, Hosoya A, Hiraga T, Koide M, Yamaguchi K, Oida H, Arai Y, Sahara N, Nakamura H, Ozawa H. Prostaglandin E2 receptor EP4-selective agonist (ONO-4819) increases bone formation by modulating mesenchymal cell differentiation. Eur J Pharmacol 2011; 650:396-402. [DOI: 10.1016/j.ejphar.2010.10.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Revised: 09/18/2010] [Accepted: 10/03/2010] [Indexed: 11/26/2022]
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Kim IS, Cho TH, Kim K, Weber FE, Hwang SJ. High power-pulsed Nd:YAG laser as a new stimulus to induce BMP-2 expression in MC3T3-E1 osteoblasts. Lasers Surg Med 2010; 42:510-8. [PMID: 20127830 DOI: 10.1002/lsm.20870] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVE High-power laser has recently become a physical stimulus for bone regeneration. Little is known about how high-power laser irradiation affects osteoblast differentiation. This study investigated osteoblast responses to high-power laser and combined irradiation with BMP-2 treatment. STUDY DESIGN/MATERIALS AND METHODS MC3T3-E1 pre-osteoblasts were exposed to laser irradiation, 100 ng/ml BMP-2 or both. Cells were irradiated with a Q-switched, pulsed neodymium-doped yttrium aluminum garnet (Nd:YAG) laser, with a 1,064 nm wavelength and 0.75 W output power under 1.5, 3, or 5 J/cm(2) energy densities. Cell proliferation was evaluated using tetrazolium salt, WST-8. To determine the effect of these treatments on in vitro osteogenesis, we examined alkaline phosphatase (ALP) activity, mineral deposition, and expression of genes associated with osteogenesis. Quantitative real time PCR or ELISA was used to examine cytokine expression. In each experiment, either non-irradiated or BMP-2 (100 ng/ml)-treated cells were used as controls. RESULTS High-power, low-level, Nd:YAG laser irradiation significantly increased ALP activity, when combined with BMP-2 or not. Cell proliferation declined in the irradiation and combined irradiation/BMP-2 groups. Interestingly, Nd:YAG laser stimulation resulted in significant induction of endogenous BMP-2 protein and gene expression. The increased expression of upstream regulators cbfa1 by Nd:YAG laser alone was comparable to exogenous BMP-2 treatment (100 ng/ml). Combined laser/BMP-2 treatment was synergistic in the expression of some genes (IGF-1, cbfa1) and ALP activity, compared to both BMP-2 treatment and laser irradiation alone. In vitro matrix mineralization was significantly accelerated by laser stimulation compared to that of the control, more so than with the combined laser/BMP-2 treatment. CONCLUSIONS The present in vitro findings demonstrate that high-power, low-level Nd:YAG laser increased osteoblast activity, very efficiently accelerating mineral deposition. Osteoinductive effect of laser is likely mediated by activation of BMP-2-related signaling pathway.
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Affiliation(s)
- In Sook Kim
- Dental Research Institute, Seoul National University, 28 Yeongun-Dong, Chongro-Gu, Seoul, 110-749, Republic of Korea
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Pires-Oliveira DAA, Oliveira RF, Amadei SU, Pacheco-Soares C, Rocha RF. Laser 904 nm action on bone repair in rats with osteoporosis. Osteoporos Int 2010; 21:2109-14. [PMID: 20204601 DOI: 10.1007/s00198-010-1183-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Accepted: 12/17/2009] [Indexed: 10/19/2022]
Abstract
SUMMARY The aim of the present study was to determine the action of AsGA laser irradiation on bone repair in the tibia of osteopenic rats. The animals were randomly divided into eight experimental groups according to the presence of ovarian hormone (sham group) or the absence of the hormone (OVX group), as well as being irradiated or non-irradiated. Low-level 904-nm laser (50 mJ/cm(2)) accelerated the repair process of osteopenic fractures, especially in the initial phase of bone regeneration. INTRODUCTION The development of new techniques to speed the process of bone repair has provided significant advances in the treatment of fractures. Some attention recently focused on the effects of biostimulation on bone. METHODS Forty-eight adult rats were randomly divided into eight experimental groups (six animals in each group) according to the presence of ovarian hormone (sham group) or absence of the hormone (ovariectomized (OVX) group) as well as being irradiated or non-irradiated. For the application of low-level laser therapy, the animals were anesthetized with one third of the dose sufficient to immobilize the animal and irradiated with AsGa laser (904 nm, 50 mJ/cm(2) for 2 s, point form and in contact). The control animals received the same type of manipulation as the irradiated animals, but with the laser turned off. Half of the animals were killed 7 days following the confection of the bone defect, and the other half were killed 21 days after the surgery. After complete demineralization, the tibias were cut cross-sectionally in the central region of the bone defect and embedded in paraffin blocks. The blocks were then cut in semi-seriated slices and stained with hematoxylin and eosin. RESULTS There was new bone formation in the animals in the OVX group with laser treatment killed after 7 days (p < 0.001). The lowest percentage of bone formation was observed in the OVX without laser killed after 7 days (p > 0.05). All animals killed after 21 days exhibited linear closure of the lesion. CONCLUSION Low-level 904-nm laser (50 mJ/cm(2)) accelerated the repair process of osteopenic fractures, especially in the initial phase of bone regeneration.
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Affiliation(s)
- D A A Pires-Oliveira
- Programa de Pós Graduação-Unicastelo, Departamento Curso de Odontologia, Universidade Camilo Castelo Branco-Unicastelo São Paulo, Rua Carolina Fonseca 584, Itaquera, São Paulo, São Paulo, CEP-08.230-030, Brazil.
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Hirata S, Kitamura C, Fukushima H, Nakamichi I, Abiko Y, Terashita M, Jimi E. Low-level laser irradiation enhances BMP-induced osteoblast differentiation by stimulating the BMP/Smad signaling pathway. J Cell Biochem 2010; 111:1445-52. [DOI: 10.1002/jcb.22872] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Low-level Er:YAG laser irradiation enhances osteoblast proliferation through activation of MAPK/ERK. Lasers Med Sci 2010; 25:559-69. [DOI: 10.1007/s10103-010-0761-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Indexed: 12/17/2022]
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Saracino S, Mozzati M, Martinasso G, Pol R, Canuto RA, Muzio G. Superpulsed laser irradiation increases osteoblast activity via modulation of bone morphogenetic factors. Lasers Surg Med 2009; 41:298-304. [PMID: 19347943 DOI: 10.1002/lsm.20762] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND AND OBJECTIVE Laser therapy is a new approach applicable in different medical fields when bone loss occurs, including orthopedics and dentistry. It has also been used to induce soft-tissue healing, for pain relief, bone, and nerve regeneration. With regard to bone synthesis, laser exposure has been shown to increase osteoblast activity and decrease osteoclast number, by inducing alkaline phosphatase (ALP), osteopontin, and bone sialoprotein expression. Studies have investigated the effects of continuous or pulsed laser irradiation, but no data are yet available on the properties of superpulsed laser irradiation. This study thus aimed to investigate the effect of superpulsed laser irradiation on osteogenic activity of human osteoblast-like cells, paying particular attention to investigating the molecular mechanisms underlying the effects of this type of laser radiation. STUDY DESIGN/MATERIALS AND METHODS Human osteoblast-like MG-63 cells were exposed to 3, 7, or 10 superpulsed laser irradiation (pulse width 200 nanoseconds, minimum peak power 45 W, frequency 30 kHz, total energy 60 J, exposure time 5 minutes). The following parameters were evaluated: cell growth and viability (light microscopy, lactate dehydrogenase release), calcium deposits (Alizarin Red S staining), expression of bone morphogenetic factors (real-time PCR). RESULTS Superpulsed laser irradiation decreases cell growth, induces expression of TGF-beta2, BMP-4, and BMP-7, type I collagen, ALP, and osteocalcin, and increases the size and the number of calcium deposits. The stimulatory effect is maximum on day 10, that is, after seven applications. CONCLUSIONS Reported results show that superpulsed laser irradiation, like the continuous and pulsed counterparts, possesses osteogenic properties, inducing the expression of molecules known to be important mediators of bone formation and, as a consequence, increasing calcium deposits in human MG-63 cells. Moreover, the data suggest a new potential role for PPARgamma as a regulator of osteoblast proliferation.
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Affiliation(s)
- Silvia Saracino
- Department of Experimental Medicine and Oncology, University of Turin, Corso Raffaello 30, 10125 Turin, Italy
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Kazem Shakouri S, Soleimanpour J, Salekzamani Y, Oskuie MR. Effect of low-level laser therapy on the fracture healing process. Lasers Med Sci 2009; 25:73-7. [DOI: 10.1007/s10103-009-0670-7] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Accepted: 03/24/2009] [Indexed: 12/26/2022]
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Pampu AA, Dolanmaz D, Tüz HH, Avunduk MC, Kisşnisşci RŞ. Histomorphometric Evaluation of the Effects of Zoledronic Acid on Mandibular Distraction Osteogenesis in Rabbits. J Oral Maxillofac Surg 2008; 66:905-10. [DOI: 10.1016/j.joms.2007.12.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2007] [Revised: 10/03/2007] [Accepted: 12/05/2007] [Indexed: 10/22/2022]
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Carroll J. Photomedicine and LLLT LiteratureWatch. Photomed Laser Surg 2007; 25:233-4. [PMID: 17603866 DOI: 10.1089/pho.2007.5678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- James Carroll
- THOR Laser Ltd, The Old British Schoolhouse, Chesham, UK.
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