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Sodsook W, Kobayashi Y, Kamimoto H, Niki Y, Yokoo K, Chantarawaratit PO, Moriyama K. Roles of B-cell lymphoma 6 in orthodontic tooth movement of rat molars. Eur J Orthod 2025; 47:cjaf006. [PMID: 39917993 DOI: 10.1093/ejo/cjaf006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2025]
Abstract
INTRODUCTION B-cell lymphoma 6 (Bcl6) inhibits osteoclast differentiation in vitro; however, its role in orthodontic tooth movement (OTM) remains unclear. This study aimed to investigate the role of Bcl6 in OTM of rat molars. MATERIALS AND METHODS OTM was performed on the maxillary first molars of male rats using nickel-titanium coil springs (25 gf) for 14 days with or without local injection of FX1 (50 mg/kg), a Bcl6 inhibitor (n = 10 per group). Micro-computed tomography (CT) images were used to analyse OTM distance and bone morphometric parameters. Immunohistochemistry (IHC) determined Bcl6 expression and tartrate-resistant acid phosphatase staining (TRAP) staining assessed osteoclast differentiation. TRAP staining, and reverse transcription-quantitative polymerase chain reaction determined the effect of FX1 (1 μM) on in vitro rat osteoclast differentiation. The effect of FX1 on cell proliferation and Smad4 expression in periodontal ligament (PDL) cells was determined. RESULTS Administration of FX1 significantly increased OTM distance and decreased the bone/tissue volume compared with vehicle treatment. IHC staining showed that the vehicle-OTM group had higher expression of Bcl6 than the FX1-OTM group. The number of osteoclasts on the compression side was significantly higher in the FX1-OTM group than that in the vehicle-OTM group. FX1 enhanced osteoclast differentiation and expression of Nfatc1, Dc-stamp, and Ctsk mRNA in osteoclasts in vitro. FX1 significantly promotes PDL cell proliferation in vivo and in vitro. LIMITATIONS We evaluated only 14 days of OTM. CONCLUSIONS Bcl6 may play an important role in OTM via modulation of osteoclast differentiation and PDL cell proliferation.
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Affiliation(s)
- Wasupol Sodsook
- Department of Maxillofacial Orthognathics, Division of Maxillofacial and Neck Reconstruction, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45, Yushima, Bunkyo-ku, Tokyo, Japan
- Department of Orthodontics, Faculty of Dentistry, Chulalongkorn University, 34 Henri Dunant Road, Pathum Wan, Bangkok, Thailand
- Institute of Science Tokyo and Chulalongkorn University International Joint Degree Doctor of Philosophy Program in Orthodontics
| | - Yukiho Kobayashi
- Department of Maxillofacial Orthognathics, Division of Maxillofacial and Neck Reconstruction, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Hiroyuki Kamimoto
- Department of Maxillofacial Orthognathics, Division of Maxillofacial and Neck Reconstruction, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Yuki Niki
- Department of Maxillofacial Orthognathics, Division of Maxillofacial and Neck Reconstruction, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45, Yushima, Bunkyo-ku, Tokyo, Japan
| | - Koji Yokoo
- Drug Discovery Research, Astellas Pharma Inc., 21 Miyukigaoka, Tsukuba, Ibaraki 305-8585, Japan
| | - Pintu-On Chantarawaratit
- Department of Orthodontics, Faculty of Dentistry, Chulalongkorn University, 34 Henri Dunant Road, Pathum Wan, Bangkok, Thailand
| | - Keiji Moriyama
- Department of Maxillofacial Orthognathics, Division of Maxillofacial and Neck Reconstruction, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45, Yushima, Bunkyo-ku, Tokyo, Japan
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Abdel-Haffiez SH, Khalil NM. Effect of platelet rich plasma injection on bone formation in the expanded mid-palatal suture in rabbits: a randomized controlled animal study. BMC Oral Health 2024; 24:167. [PMID: 38308245 PMCID: PMC10835953 DOI: 10.1186/s12903-024-03922-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 01/21/2024] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Mid-Palatal suture expansion needs long retention period due to delayed bone formation in the expanded suture. Platelet-rich plasma (PRP) is a concentrated source of growth factors which increase bone formation. The aim of this study was to evaluate the effect of PRP injection on bone formation in expanded mid palatal suture in rabbits. METHODS In this prospective randomized controlled animal study, Twenty male rabbits (8-weeks-old) were subjected to mid-palatal expansion for 5 days. Animals were afterwards randomly divided into control group A & study group B. PRP was prepared and injected in the mid-palatal suture in animals belonging to group B only. After 6 weeks of retention, all animals were euthanized, and premaxillae were prepared for histological, histomorphometric and immunohistochemical analysis. Student t-test and paired t-test were used to compare the means of the two groups and within the same group respectively. Significance level set at p ≤ 0.05. RESULTS Histomorphometric analysis revealed a significant increase (p < 0.001) in the mean percentage of new bone in the study group (14.4%) compared to the control (1.4%). Suture width in study group was significantly wider than the control group (278.8 ± 9μms and 120.4 ± 3.4μms, p < 0.001). There was a significant increase in vascular density in study group than control group (309 ± 65.34 and 243.86 ± 48.1, p = 0.021). Osteopontin immuno-expression revealed a significant increase in optical density in study group than control group (0.21 ± 0.02 & 0.12 ± 0.01, p < 0.001). CONCLUSIONS In rabbit model, PRP injection can accelerate new bone formation in the expanded mid-palatal suture when compared to the control. This could hopefully result in a more stable midpalatal expansion and a reduced retention period.
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Ibrahimi Disha S, Furlani B, Drevensek G, Plut A, Yanagisawa M, Hudoklin S, Prodan Žitnik I, Marc J, Drevensek M. The role of endothelin B receptor in bone modelling during orthodontic tooth movement: a study on ET B knockout rats. Sci Rep 2020; 10:14226. [PMID: 32848199 PMCID: PMC7450079 DOI: 10.1038/s41598-020-71159-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 08/10/2020] [Indexed: 02/06/2023] Open
Abstract
The endothelin system has an important role in bone modelling during orthodontic tooth movement (OTM); however, little is known about the involvement of endothelin B receptors (ETB) in this process. The aim of this study was to evaluate the role of ETB in bone modelling during OTM using ETB knockout rats (ETB-KO). Thirty-two male rats were divided into 4 groups (n = 8 per group): the ETB-KO appliance group, ETB-KO control group, wild type (ETB-WT) appliance group, and ETB-WT control group. The appliance consisted of a super-elastic closed-coil spring placed between the first and second left maxillary molar and the incisors. Tooth movement was measured on days 0 and 35, and maxillary alveolar bone volume, osteoblast, and osteoclast volume were determined histomorphometrically on day 35 of OTM. Next, we determined the serum endothelin 1 (ET-1) level and gene expression levels of the osteoclast activity marker cathepsin K and osteoblast activity markers osteocalcin and dentin matrix acidic phosphoprotein 1 (DMP1) on day 35. The ETB-KO appliance group showed significantly lower osteoblast activity, diminished alveolar bone volume and less OTM than the ETB-WT appliance group. Our results showed that ETB is involved in bone modelling in the late stage of OTM.
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Affiliation(s)
- S Ibrahimi Disha
- Department of Orthodontics, Faculty of Medicine, University of Ljubljana, Hrvatski trg 6, 1000, Ljubljana, Slovenia
| | - B Furlani
- Institute of Pharmacology and Experimental Toxicology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - G Drevensek
- Institute of Pharmacology and Experimental Toxicology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - A Plut
- Department of Orthodontics, University Medical Center Ljubljana, Ljubljana, Slovenia
| | - M Yanagisawa
- International Institute for Integrative Sleep Medicine, University of Tsukuba, Tsukuba, Japan
| | - S Hudoklin
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - I Prodan Žitnik
- Department of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - J Marc
- Department of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - M Drevensek
- Department of Orthodontics, Faculty of Medicine, University of Ljubljana, Hrvatski trg 6, 1000, Ljubljana, Slovenia. .,Department of Orthodontics, University Medical Center Ljubljana, Ljubljana, Slovenia.
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Systematic review of biological therapy to accelerate orthodontic tooth movement in animals: Translational approach. Arch Oral Biol 2019; 110:104597. [PMID: 31739076 DOI: 10.1016/j.archoralbio.2019.104597] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/08/2019] [Accepted: 10/29/2019] [Indexed: 01/10/2023]
Abstract
OBJECTIVES To systematically review and evaluate what is known regarding contemporary biological therapy capable of accelerating orthodontic tooth movement (OTM) in animal model. MATERIALS AND METHODS MedLine, Scopus, Web of Science and OpenGrey were searched without restrictions until June 2019. Following study retrieval and selection, relevant data was extracted using a standardized table. Risk of bias (RoB) assessment was performed using the Systematic Review Centre for Laboratory Animal Experimentation (SYRCLE) tool. RESULTS Fifty-one animal studies were included. Two biological therapies were identified as capable of accelerating the OTM: chemical methods (49 studies) and gene therapy (2 studies). The main substances that increased the OTM rate were cytokines (13 studies), followed by growth factors (6 studies) and hormones (5 studies). Most studies were assessed to be at unclear or high RoB. The application protocols, measurement and reporting of outcomes varied widely and methodologies were not adequately reported. CONCLUSIONS Although biological therapies to accelerate OTM have been widely tested and effective in preclinical studies, the validity of the evidence is flawed to support translational of these results. There is a need for well-designed experimental studies to translate these methods for clinical field.
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Sin A, Tang W, Wen CY, Chung SK, Chiu KY. The emerging role of endothelin-1 in the pathogenesis of subchondral bone disturbance and osteoarthritis. Osteoarthritis Cartilage 2015; 23:516-24. [PMID: 25463446 DOI: 10.1016/j.joca.2014.11.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 10/28/2014] [Accepted: 11/02/2014] [Indexed: 02/02/2023]
Abstract
Mounting evidence suggests reconceptualizing osteoarthritis (OA) as an inflammatory disorder. Trauma and obesity, the common risk factors of OA, could trigger the local or systemic inflammatory cytokines cascade. Inflammatory bone loss has been well documented; yet it remains largely unknown about the link between the inflammation and hypertrophic changes of subchondral bone seen in OA, such as osteophytosis and sclerosis. Amid a cohort of inflammatory cytokines, endothelin-1 (ET-1) could stimulate the osteoblast-mediated bone formation in both physiological (postnatal growth of trabecular bone) and pathological conditions (bone metastasis of prostate or breast cancer). Also, ET-1 is known as a mitogen and contributes to fibrosis in various organs, e.g., skin, liver, lung, kidney heart and etc., as a result of inflammatory or metabolic disorders. Subchondral bone sclerosis shared the similarity with fibrosis in terms of the overproduction of collagen type I. We postulated that ET-1 might have a hand in the subchondral bone sclerosis of OA. Meanwhile, ET-1 was also able to stimulate the production of matrix metalloproteinase (MMP)-1 and 13 by articular chondrocytes and synoviocytes, by which it might trigger the enzymatic degradation of articular cartilage. Taken together, ET-1 signaling may play a role in destruction of bone-cartilage unit in the pathogenesis of OA; it warrants further investigations to potentiate ET-1 as a novel diagnostic biomarker and therapeutic target for rescue of OA.
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Affiliation(s)
- A Sin
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong; Georgetown University Medical Center, Washington, DC 20057, USA
| | - W Tang
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong
| | - C Y Wen
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong.
| | - S K Chung
- Department of Anatomy, The University of Hong Kong, Pokfulam, Hong Kong; Heart, Brain, Hormone and Healthy Aging Center, The University of Hong Kong, Pokfulam, Hong Kong; State Key Laboratory for Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - K Y Chiu
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong
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Kirschneck C, Proff P, Fanghaenel J, Behr M, Wahlmann U, Roemer P. Differentiated analysis of orthodontic tooth movement in rats with an improved rat model and three-dimensional imaging. Ann Anat 2013; 195:539-53. [DOI: 10.1016/j.aanat.2013.08.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 08/26/2013] [Accepted: 08/28/2013] [Indexed: 01/06/2023]
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Effect of LED-mediated-photobiomodulation therapy on orthodontic tooth movement and root resorption in rats. Lasers Med Sci 2013; 30:779-85. [DOI: 10.1007/s10103-013-1405-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 07/17/2013] [Indexed: 11/25/2022]
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Marquezan M, Bolognese AM, Araújo MTDS. Evaluation of two protocols for low-level laser application in patients submitted to orthodontic treatment. Dental Press J Orthod 2013; 18:33.e1-9. [PMID: 23876967 DOI: 10.1590/s2176-94512013000100009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023] Open
Abstract
INTRODUCTION: Different low-level laser (LLL) irradiation protocols have been tested to accelerate orthodontic tooth movement (OTM). Nevertheless, divergent results have been obtained. It was suggested that the stimulatory action of low level laser irradiation occurs during the proliferation and differentiation stages of bone cellular precursors, but not during later stages. OBJECTIVE: The purpose of this study was to determine the effect of two protocols of LLL irradiation on experimental tooth movement: One with daily irradiations and another with irradiations during the early stages. METHODS: Thirty-six rats were divided into control groups (CG1, CG2, CG3) and irradiated groups (IrG1, IrG2, IrG3) according to the presence of: experimental tooth movement, laser irradiation, type of laser irradiation protocol and date of euthanasia (3th or 8th day of experiment). At the end of experimental periods, a quantitative evaluation of the amount of OTM was made and the reactions of the periodontium were analyzed by describing cellular and tissue reactions and by counting blood vessels. RESULTS: The amount of OTM revealed no significant differences between groups in the same experimental period (p < 0.05). Qualitative analysis revealed the strongest resorption activity in irradiated groups after seven days, especially when using the daily irradiation protocol. There was a higher number of blood vessels in irradiated animals than in animals without orthodontic devices and without laser irradiation (p < 0.05). CONCLUSION: Moreover, angiogenesis was verified in some of the irradiated groups. The irradiation protocols tested were not able to accelerate OTM and root resorption was observed while they were applied.
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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: 1.1] [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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Zhao N, Lin J, Kanzaki H, Ni J, Chen Z, Liang W, Liu Y. Local osteoprotegerin gene transfer inhibits relapse of orthodontic tooth movement. Am J Orthod Dentofacial Orthop 2012; 141:30-40. [DOI: 10.1016/j.ajodo.2011.06.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2011] [Revised: 06/01/2011] [Accepted: 06/01/2011] [Indexed: 10/14/2022]
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Meh A, Sprogar Š, Vaupotic T, Cör A, Drevenšek G, Marc J, Drevenšek M. Effect of cetirizine, a histamine (H1) receptor antagonist, on bone modeling during orthodontic tooth movement in rats. Am J Orthod Dentofacial Orthop 2011; 139:e323-9. [DOI: 10.1016/j.ajodo.2009.11.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2009] [Revised: 11/01/2009] [Accepted: 11/01/2009] [Indexed: 01/19/2023]
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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: 2.3] [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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Marquezan M, Bolognese AM, de Souza Araújo MT. Effects of Two Low-Intensity Laser Therapy Protocols on Experimental Tooth Movement. Photomed Laser Surg 2010; 28:757-62. [DOI: 10.1089/pho.2009.2694] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - Ana Maria Bolognese
- Department of Pedodontics and Orthodontics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Gama SKC, Habib FAL, de Carvalho JS, Monteiro, Paraguassú GM, Araújo TM, Cangussú MCT, Pinheiro ALB. Tooth Movement After Infrared Laser Phototherapy: Clinical Study in Rodents. Photomed Laser Surg 2010; 28 Suppl 2:S79-83. [DOI: 10.1089/pho.2009.2618] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- 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
- Laser Center, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - 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
- Laser Center, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | | | - Monteiro
- Laser Center, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - Gardênia M. Paraguassú
- Laser Center, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | - Telma Martins Araújo
- Centro de Ortodontia e Ortopedia Facial Prof. José Édimo Soares Martins, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
| | | | - Antonio Luiz B. Pinheiro
- Laser Center, School of Dentistry, Federal University of Bahia (UFBA), Salvador, BA, Brazil
- Universidade Camilo Castelo Branco, São José dos Campos, SP, Brazil
- Instituto Nacional de Ciência e Tecnologia de Óptica e Fotônica, São Carlos, SP, Brazil
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Sprogar S, Meh A, Vaupotic T, Drevensek G, Drevensek M. Expression levels of endothelin-1, endothelin-2, and endothelin-3 vary during the initial, lag, and late phase of orthodontic tooth movement in rats. Eur J Orthod 2010; 32:324-8. [DOI: 10.1093/ejo/cjp091] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Drevensek M, Volk J, Sprogar S, Drevensek G. Orthodontic force decreases the eruption rate of rat incisors. Eur J Orthod 2008; 31:46-50. [DOI: 10.1093/ejo/cjn078] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Sprogar S, Vaupotic T, Cör A, Drevensek M, Drevensek G. The endothelin system mediates bone modeling in the late stage of orthodontic tooth movement in rats. Bone 2008; 43:740-7. [PMID: 18656564 DOI: 10.1016/j.bone.2008.06.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2008] [Revised: 06/06/2008] [Accepted: 06/16/2008] [Indexed: 01/30/2023]
Abstract
The endothelin system is involved in orthodontic tooth movement (OTM). The aim of the study was to examine the role of ET-1, ET(A) and ET(B) in bone modeling during OTM in rats. Male Wistar rats (n=62) were divided into three groups: control animals (n=10; control group) without appliance, and two groups of experimental animals, which were applied a super-elastic closed-coil spring between the first left maxillary molar and the incisors and were treated daily with either TBC3214 (n=10; TBC3214 group) or with saline (n=42; appliance only group). TBC3214 is a highly selective antagonist on ET(A) receptors. The distance between teeth was measured on days 0 and 42. On days 0, 14, 28 and 42 animals of the appliance only group (n=8) were sacrificed and tissue samples were taken. Total RNA and protein contents were isolated. Gene expression levels of ET-1, ET(A) and ET(B) were assessed by means of relative RT-PCR. Protein levels of ET(A) and ET(B) were examined by immunoblotting. Ten animals of each group were sacrificed on day 42 and tissue samples were prepared for histological analysis. Alveolar bone volume, osteoblast and osteoclast volume were determined histomorphometrically. Gene expression levels of ET-1, ET(A) and ET(B) varied throughout the experiment and were significantly up-regulated on day 42 (p<0.001). The immunoreactivity of ET(A) and ET(B) significantly decreased on day 14 (p<0.001) and increased on day 28 (p<0.001). Alveolar bone volume was significantly higher in the TBC3214 group compared to the appliance only group (p<0.001). Osteoclast volume was significantly lower in the TBC3214 group compared to the appliance only group (p<0.05). Gene and protein expression levels of ET-1, ET(A) and ET(B) varied significantly during OTM, suggesting their different roles in the various stages of OTM. TBC3214 significantly increased alveolar bone volume and significantly decreased osteoclast volume, indicating that it decreased bone resorption in stage three of OTM. These data suggest that ET-1 increases osteoclastic bone resorption via ET(A) in the late stage of OTM.
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Affiliation(s)
- Spela Sprogar
- Institute of Pharmacology and Experimental Toxicology, Faculty of Medicine, University of Ljubljana, Korytkova 2, Ljubljana, Slovenia.
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Abstract
Teeth move through alveolar bone, whether through the normal process of tooth eruption or by strains generated by orthodontic appliances. Both eruption and orthodontics accomplish this feat through similar fundamental biological processes, osteoclastogenesis and osteogenesis, but there are differences that make their mechanisms unique. A better appreciation of the molecular and cellular events that regulate osteoclastogenesis and osteogenesis in eruption and orthodontics is not only central to our understanding of how these processes occur, but also is needed for ultimate development of the means to control them. Possible future studies in these areas are also discussed, with particular emphasis on translation of fundamental knowledge to improve dental treatments.
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Affiliation(s)
- G E Wise
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA.
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