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Hatefi S, Alizargar J, Le Roux F, Hatefi K, Etemadi Sh M, Davids H, Hsieh NC, Smith F, Abou-El-Hossein K. Review of physical stimulation techniques for assisting distraction osteogenesis in maxillofacial reconstruction applications. Med Eng Phys 2021; 91:28-38. [PMID: 34074463 DOI: 10.1016/j.medengphy.2021.03.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 02/17/2021] [Accepted: 03/24/2021] [Indexed: 01/24/2023]
Abstract
Distraction Osteogenesis (DO) is an emerging limb lengthening method for the reconstruction of the hard tissue and the surrounding soft tissue, in different human body zones. DO plays an important role in treating bone defects in Maxillofacial Reconstruction Applications (MRA) due to reduced side effects and better formed bone tissue compared to conventional reconstruction methods i.e. autologous bone graft, and alloplast implantation. Recently, varying techniques have been evaluated to enhance the characteristics of the newly formed tissues and process parameters. Promising results have been shown in assisting DO treatments while benefiting bone formation mechanisms by using physical stimulation techniques, including photonic, electromagnetic, electrical, and mechanical stimulation technique. Using assisted DO techniques has provided superior results in the outcome of the DO procedure compared to a standard DO procedure. However, DO methods, as well as assisting technologies applied during the DO procedure, are still emerging. Studies and experiments on developed solutions related to this field have been limited to animal and clinical trials. In this review paper, recent advances in physical stimulation techniques and their effects on the outcome of the DO treatment in MRA are surveyed. By studying the effects of using assisting techniques during the DO treatment, enabling an ideal assisted DO technique in MRA can be possible. Although mentioned techniques have shown constructive effects during the DO procedure, there is still a need for more research and investigation to be done to fully understand the effects of assisting techniques and advanced technologies for use in an ultimate DO procedure in MRA.
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Affiliation(s)
- Shahrokh Hatefi
- Precision Engineering Laboratory, Nelson Mandela University, Port Elizabeth, South Africa.
| | - Javad Alizargar
- Research Center for Healthcare Industry Innovation, National Taipei University of Nursing and Health Sciences, Taipei 112, Taiwan.
| | - Francis Le Roux
- Department of Mechatronics Engineering, Nelson Mandela University, Port Elizabeth, South Africa.
| | - Katayoun Hatefi
- Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran.
| | - Milad Etemadi Sh
- Department of Oral and Maxillofacial Surgery, Dental Implants Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Hajierah Davids
- Department of Physiology, Nelson Mandela University, Port Elizabeth, South Africa.
| | - Nan-Chen Hsieh
- Department of Information Management, National Taipei University of Nursing and Health Sciences, Taipei 112, Taiwan.
| | - Farouk Smith
- Department of Mechatronics Engineering, Nelson Mandela University, Port Elizabeth, South Africa.
| | - Khaled Abou-El-Hossein
- Precision Engineering Laboratory, Nelson Mandela University, Port Elizabeth, South Africa.
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Sarmadi S, Tanbakuchi B, Hesam Arefi A, Chiniforush N. The Effect of Photobiomodulation on Distraction Osteogenesis. J Lasers Med Sci 2019; 10:330-337. [PMID: 31875127 DOI: 10.15171/jlms.2019.53] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Distraction osteogenesis (DO) is a surgical procedure to increase bone height in different body parts. DO includes a surgical incision, wherein the bone is cut and a device is installed for further separation of the two ends by gradual unscrewing of the device screw. New bone gradually forms and fills the gap, and the bone height increases as such. Photobiomodulation (PBM) or low-level laser therapy (LLLT) enhances the formation of soft and hard tissue such as bone and can, therefore, accelerate the process of DO and shorten the duration of different surgical phases of DO such as latency, activation, and consolidation. Different laser types with variable exposure settings and protocols have been used for this purpose. The gallium-aluminum-arsenide (GaAlAs) diode laser is the most commonly used laser type for LLLT. This study reviews 18 published articles on the effects of LLLT on DO and summarizes their findings to further elucidate this topic.
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Affiliation(s)
- Sarvin Sarmadi
- Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Behrad Tanbakuchi
- Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Nasim Chiniforush
- Laser Research Center of Dentistry (LRCD), Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
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Senel E, Ozkan E, Bereket MC, Onger ME. The assessment of new bone formation induced by unfocused extracorporeal shock wave therapy applied on pre-surgical phase of distraction osteogenesis. Eur Oral Res 2019; 53:125-131. [PMID: 31579893 PMCID: PMC6761485 DOI: 10.26650/eor.20190041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 02/06/2019] [Accepted: 02/08/2019] [Indexed: 11/24/2022] Open
Abstract
Purpose: This study aims to evaluate the effects of extracorporeal shock wave therapy
applied before and/or immediately after the osteotomy on the maturation during
the consolidation phase. Materials and methods: 21 female New Zealand rabbits were used in the study. Subjects were divided
randomly into three groups: Control (Distraction without ESWT), A (Distraction
+ESWT After Osteotomy), AB (Distraction+ESWT After and Before Osteotomy).
ESWT (500 pulses, 5 Hz, 0.19 mJ/mm2 energy flux density) was applied to group
A and group AB after 5, 12 and 19 days after osteotomy and group AB only on
days 7,14 and 21 before osteotomy. On the 28th day of the consolidation period,
all subjects were sacrificed. Dual-energy x-ray absorptiometry (DEXA) was used
to determine bone mineral density (BMD) and bone mineral content (BMC), and
stereological methods were used to determine the new bone, connective tissue
and neovascularization volumes. Results: As a result of DEXA examinations made on the 1st and 4th week of consolidation,
there was no significant difference between groups regarding BMD and BMC
values. According to the results of stereological examination, when the connective
tissue and new bone tissue were evaluated, higher values were observed in AB
when compared to A, and in AB and A compared to the control group, but the
differences are not statistically significant. There was no difference between the
groups in terms of neovascularization. Conclusion: ESWT in these parameters was not positively effective in bone maturation during
consolidation when applied before osteotomy or both before and after osteotomy.
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Affiliation(s)
- Erman Senel
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Pamukkale University, Denizli,Turkey
| | - Enes Ozkan
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul Medeniyet University, Istanbul, Turkey
| | - Mehmet Cihan Bereket
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Mehmet Emin Onger
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayis University,Samsun, Turkey
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Effect of Laser Bio-Stimulation on Mandibular Distraction Osteogenesis: An Experimental Study. J Oral Maxillofac Surg 2018; 76:2411-2421. [PMID: 29856939 DOI: 10.1016/j.joms.2018.04.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Revised: 04/24/2018] [Accepted: 04/24/2018] [Indexed: 11/23/2022]
Abstract
PURPOSE The aim of this study was to evaluate the osseous response to laser bio-stimulation clinically and histologically during distraction osteogenesis (DO) induced in the mandibles of mongrel dogs. MATERIALS AND METHODS Thirty dogs were divided into 3 groups of 10 (5 with and 5 without laser treatment) according to sacrifice periods (2, 4, and 8 weeks after distraction). DO was performed between the mandibular second and third premolars using an internal linear distractor. After a 7-day latency period, the distractor was activated at the rate of 1 mm per day for 10 days followed by a consolidation period during which the right mandibular side was irradiated with a diode laser (wavelength [λ], 970 nm; power, 2 W; spot size, 320 μm; total energy [E], 840 J), whereas the control group was not irradiated, after distraction. Histologic specimens were prepared and histomorphometric analysis of specimens was performed. RESULTS Clinical examinations showed that the low-intensity laser diode had a pronounced effect on the quality and quantity of newly formed bone in the DO regenerate in the laser groups compared with the control groups. Histopathologic sections from laser groups I, II, and III displayed the bio-stimulatory effect of laser on new bone through an increased rate of osteoblast proliferation and differentiation, an accelerated rate of intramembranous ossification, and increased neoangiogenesis compared with the control groups. Moreover, the histomorphometric results showed that mean bone trabecular size, bone trabecular total area, and bony area fraction of the regenerate were larger and statistically significant (P < .05) especially in laser groups I and II (early stages of bone formation) compared with the control groups. CONCLUSION The low-level diode laser had a positive role as a potential bio-stimulator and local inducer in enhancing bone formation during DO and resulted in early stability of the bone regenerate, a shorter total treatment time, and improved new bone quality and quantity.
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Influence of a Magnetic Field and Laser Therapy on the Quality of Mandibular Bone During Distraction Osteogenesis in Rabbits. J Oral Maxillofac Surg 2016; 74:2287.e1-2287.e8. [DOI: 10.1016/j.joms.2016.07.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 07/06/2016] [Accepted: 07/12/2016] [Indexed: 11/21/2022]
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The Radiological and Stereological Analysis of the Effect of Low-Level Laser Therapy on the Mandibular Midline Distraction Osteogenesis. J Craniofac Surg 2015; 26:e595-9. [DOI: 10.1097/scs.0000000000002046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Abd-Elaal A, El-Mekawii H, Saafan A, El Gawad L, El-Hawary Y, Abdelrazik M. Evaluation of the effect of low-level diode laser therapy applied during the bone consolidation period following mandibular distraction osteogenesis in the human. Int J Oral Maxillofac Surg 2015; 44:989-97. [DOI: 10.1016/j.ijom.2015.04.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 04/10/2015] [Accepted: 04/21/2015] [Indexed: 11/26/2022]
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Freddo AL, Hauser EB, de Castro VV, Noritomi PY, de Almeida AS, de Oliveira MG. Finite element analysis of masticatory stress on neoformed bone tissue after distraction osteogenesis and low-level laser therapy: a pilot study. Photomed Laser Surg 2014; 32:429-36. [PMID: 25054426 DOI: 10.1089/pho.2013.3671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE This study aimed to understand the action of masticatory forces on an implant virtually introduced into the sheep mandible after distraction osteogenesis and low-level laser therapy (LLLT) by using finite element analysis. BACKGROUND DATA Distraction osteogenesis as an alternative for bone reconstruction that may be used in the treatment of deformities. METHODS Four ewes underwent distraction osteogenis to elongate the left mandibular body by 15 m, and three of them underwent LLLT with the purpose of improving bone properties. After death, animals were scanned by computed tomography and their mandibles were tridimensionally reconstructed by computer programs. The physical properties related to hardness and modulus of elasticity of each animal were obtained from the dissected mandibles, and data were transferred to Femap software for finite element analysis. RESULTS Animals exposed and not exposed to LLLT irradiation showed remarkably similar values for superficial hardness and modulus of elasticity, without statistically significant difference (p>0.05), between the values observed for the cortical bone and the cancellous bone among the groups. The neoformed mandible, after a brief period for bone healing, was able to promote stability for implant placement and proper distribution of masticatory forces. CONCLUSIONS An implant introduced virtually into the site of bone neoformation did not suffer any micromotions relevant to osteointegration. Furthermore, finite element analysis showed that the neoformed portion of the mandible was able to absorb and distribute masticatory forces throughout its structure, even after a brief period for bone maturation.
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Affiliation(s)
- Angelo Luiz Freddo
- 1 School of Dentistry, Universidade Federal do Rio Grande do Sul , Porto Alegre, Brazil
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Hong P, Boyd D, Beyea SD, Bezuhly M. Enhancement of bone consolidation in mandibular distraction osteogenesis: A contemporary review of experimental studies involving adjuvant therapies. J Plast Reconstr Aesthet Surg 2013; 66:883-95. [DOI: 10.1016/j.bjps.2013.03.030] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 02/14/2013] [Accepted: 03/16/2013] [Indexed: 11/28/2022]
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Kan B, Tasar F, Korkusuz P, Ersoy O, Cetinkaya A, Gur CZ, Celik H, Meral G. Histomorphometrical and radiological comparison of low-level laser therapy effects on distraction osteogenesis: experimental study. Lasers Med Sci 2013; 29:213-20. [DOI: 10.1007/s10103-013-1308-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 03/12/2013] [Indexed: 11/28/2022]
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Vannucci MG, Dreyer J, Kreisner P, Gaião L, Moraes JFD, de Oliveira MG. Histological and physical analysis of bone neoformation by osteogenesis distraction: A preliminary report. Ann Maxillofac Surg 2013; 1:26-31. [PMID: 23482632 PMCID: PMC3591033 DOI: 10.4103/2231-0746.83150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Osteogenesis distraction (OD) is a mainstream technique in maxillofacial surgical reconstruction with varied applications. OD technique employs a distractor with the aim to get new bone in the site of interest. Osseous maturation time is necessary before the device can be removed and few patients' complaint of related discomfort, especially when these devices are external, and induces superficial infections, paresthesia, hypertrophic scars and social relationship difficulties. The use of Low Level Laser Therapy (LLLT) has been proved beneficial to soft tissue and osseous repairs. MATERIALS AND METHOD 12 rabbits were randomly divided in to two groups. In all animals, distractor was placed and one group was exposed to LLLT while the other group served as control. After consolidation, animals were sacrificed, the new bone formed were subjected to investigations including histomorphometric, physical analysis and tomographical analysis. Statistical analyses were performed using SPSS software. RESULT Newly formed bone was significantly different between the groups. The physical properties of the neobone were comparatively better when the animals were exposed to LLLT with varying statistical significance. CONCLUSION The results obtained with smaller sample size in this study need to be interpreted with care. The results of this preliminary pilot study encourage the use of LLLT during healing period. However the histological, tomographical and physical findings need to be ascertained using a larger sample size to study the bio-stimulatory effects with laser therapy from basics to clinical relevance on wound and bone healing.
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Kocyigit ID, Coskunses FM, Pala E, Tugcu F, Onder E, Mocan A. A Comparison of the Low-Level Laser Versus Low Intensity Pulsed Ultrasound on New Bone Formed Through Distraction Osteogenesis. Photomed Laser Surg 2012; 30:438-43. [DOI: 10.1089/pho.2012.3263] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ismail Doruk Kocyigit
- Department of Oral and Maxillofacial Surgery, Kirikkale University Faculty of Dentistry, Kirikkale, Turkey
| | - Fatih Mehmet Coskunses
- Department of Oral and Maxillofacial Surgery, Gumussuyu Military Hospital, Istanbul, Turkey
| | | | - Funda Tugcu
- Department of Oral and Maxillofacial Surgery, Ankara University Faculty of Dentistry, Ankara, Turkey
| | - Ercument Onder
- Medical Center, Middle East Technical University, Ankara, Turkey
| | - Asriye Mocan
- Department of Oral and Maxillofacial Surgery, Ankara University Faculty of Dentistry, Ankara, Turkey
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EFFECT OF LOW-LEVEL LASER (GAAS, 904HM) FOR BONE REPAIR ON FRACTURES IN RATS. REVISTA BRASILEIRA DE ORTOPEDIA (ENGLISH EDITION) 2012; 47:235-40. [PMID: 27042627 PMCID: PMC4799407 DOI: 10.1016/s2255-4971(15)30092-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 07/20/2011] [Indexed: 11/20/2022]
Abstract
Objective: To analyze the effects of low-level laser therapy (GaAs, 904 nm) for bone repair on tibial fractures in rats. Methods: Forty rats were divided into four groups of 10 animals: control group without fracture (CG); fracture group without treatment (EG II); fracture group treated with laser at 10 J/cm2 (EG III); and fracture group treated with laser at 15 J/cm2 (EG IV). The fracture was produced surgically and the treatment lasted 45 days, done on alternate days. After treatment completion, the rats were sacrificed. The tibias were radiographed and subjected to mechanical three-point flexion tests in order to evaluate the maximum force (N) required to break them. Results: The observed maximum force values (N) were: control group (CG) of 51.5 N ± 7.9 N; EG II 17.2 N ± 7.8 N; EG III 16.6 N ± 12.1 N; and EG IV 30.3 N ± 7.8 N. There were statistically significant differences between the control group and the experimental groups and also between experimental group IV and the other experimental groups (II and III). Radiographs showed callus formation in all the fractured groups, thus indicating that they had undergone the normal tissue repair process. Conclusion: EG IV, which underwent laser therapy with a dosage of 15 J/cm2, showed the highest maximum force value (N) among the experimental groups, thus demonstrating the influence of higher laser dosage on bone repair.
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Valiati R, Paes JV, de Moraes AN, Gava A, Agostini M, Masiero AV, de Oliveira MG, Pagnoncelli RM. Effect of low-level laser therapy on incorporation of block allografts. Int J Med Sci 2012; 9:853-61. [PMID: 23155359 PMCID: PMC3498750 DOI: 10.7150/ijms.4440] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 10/30/2012] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To assess the effect of low-level laser therapy (LLLT) on the incorporation of deep-frozen block allografts in a rabbit model. BACKGROUND DATA Studies have shown that LLLT has beneficial effects on tissue repair and new bone formation. METHODS Bone tissue was harvested from two rabbits, processed by deep-freezing and grafted into the calvaria of 12 animals, which were then randomly allocated into two groups: experimental (L) and control (C). Rabbits in group L were irradiated with an aluminum gallium arsenide diode laser (AlGaAs; wavelength 830 nm, 4 J/cm(2)), applied to four sites on the calvaria, for a total dose of 16 J/cm(2) per session. The total treatment dose after eight sessions was 128 J/cm(2). Animals were euthanized at 35 (n = 6) or 70 days (n = 6) postoperatively. RESULTS Deep-freeze-processed block allografts followed by LLLT showed incorporation at the graft-host interface, moderate bone remodeling, partial filling of osteocyte lacunae, less inflammatory infiltrate in the early postoperative period, and higher collagen deposition than the control group. CONCLUSION Optical microscopy and scanning electron microscopy showed that allograft bone processed by deep-freezing plus LLLT is suitable as an alternative for the treatment of bone defects. Use of the deep-freezing method for processing of bone grafts preserves the structural and osteoconductive characteristics of bone tissue.
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Affiliation(s)
- Renato Valiati
- School of Dentistry, Universidade do Planalto Catarinense, Lages, Brazil.
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Freddo AL, Hübler R, de Castro-Beck CA, Heitz C, de Oliveira MG. A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy. Med Oral Patol Oral Cir Bucal 2012; 17:e102-7. [PMID: 21743401 PMCID: PMC3448184 DOI: 10.4317/medoral.17280] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Accepted: 01/31/2011] [Indexed: 11/10/2022] Open
Abstract
Objectives: To investigate the quality of newly formed bone in sheep mandibles submitted to distraction osteogenesis
and low-level laser therapy (LLLT), based on hardness and modulus of elasticity values. The ideal moment for laser application (during the latency/activation period vs. during the bone consolidation period) was also evaluated.
Computed tomography imaging was used to assess relapse as a result of early device removal.
Study design: Extraoral distraction devices were placed in five sheep so as to achieve 1.5 cm of lengthened bone in 60 days. Distraction devices were removed 50, 40, and 33 days after surgery. Four animals were treated with LLLT, at different times, and one was used as control (no LLLT).
Results: When applied during the bone consolidation period, LLLT caused an increase in hardness and modulus of elasticity values. On the other hand, animals irradiated with LLLT during the latency/activation period presented a delay in bone healing. A period of consolidation of 13 days (early device removal) was associated with relapse.
Conclusions: Nanoindentation tests were able to detect slight abnormalities in bone metabolism and proved to be important tools for the assessment of bone quality following distraction osteogenesis. LLLT provided increased benefits when applied during the bone consolidation period, once it promoted an increase in hardness and modulus of elasticity values. According to our results, the bone consolidation period should be of at least 3 weeks, so as to prevent relapse.
Key words: Osteogenesis distraction, low-level laser therapy, elastic modulus, hardness tests.
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Affiliation(s)
- Angelo-Luiz Freddo
- School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
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Feitosa MLT, Fadel L, Beltrão-Braga PCB, Wenceslau CV, Kerkis I, Kerkis A, Birgel Júnior EH, Martins JFP, Martins DDS, Miglino MA, Ambrósio CE. Successful transplant of mesenchymal stem cells in induced osteonecrosis of the ovine femoral head: preliminary results. Acta Cir Bras 2011; 25:416-22. [PMID: 20877951 DOI: 10.1590/s0102-86502010000500006] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Accepted: 05/18/2010] [Indexed: 11/22/2022] Open
Abstract
PURPOSE Evaluate the bone tissue recovery following transplantation of ovine mesenchymal stem cells (MSC) from bone marrow and human immature dental-pulp stem cells (hIDPSC) in ovine model of induced osteonecrosis of femoral head (ONFH). METHODS Eight sheep were divided in three experimental groups. First group was composed by four animals with ONFH induced by ethanol through central decompression (CD), for control group without any treatment. The second and third group were compose by two animals, six weeks after ONFH induction received transplantation of heterologous ovine MSC (CD + oMSC), and hIDPSC (CD + hIDPSC), respectively. In both experiments the cells were transplanted without application of any type of immunosupression protocol. RESULTS Our data indicate that both cell types used in experiments were able to proliferate within injured site providing bone tissue recovery. The histological results obtained from CD+hIDPSC suggested that the bone regeneration in such animals was better than that observed in CD animals. CONCLUSION Mesenchymal stem cell transplant in induced ovine osteonecrosis of femoral head by central decompression technique is safe, and apparently favors bone regeneration of damaged tissues.
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Hübler R, Blando E, Gaião L, Kreisner PE, Post LK, Xavier CB, de Oliveira MG. Effects of low-level laser therapy on bone formed after distraction osteogenesis. Lasers Med Sci 2009; 25:213-9. [DOI: 10.1007/s10103-009-0691-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Accepted: 05/22/2009] [Indexed: 10/20/2022]
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