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Omar O, Rydén L, Wamied AR, Al-Otain I, Alhawaj H, Abuohashish H, Al-Qarni F, Emanuelsson L, Johansson A, Palmquist A, Thomsen P. Molecular mechanisms of poor osseointegration in irradiated bone: In vivo study in a rat tibia model. J Clin Periodontol 2024. [PMID: 38798064 DOI: 10.1111/jcpe.14021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 04/30/2024] [Accepted: 05/15/2024] [Indexed: 05/29/2024]
Abstract
AIM Radiotherapy is associated with cell depletion and loss of blood supply, which are linked to compromised bone healing. However, the molecular events underlying these effects at the tissue-implant interface have not been fully elucidated. This study aimed to determine the major molecular mediators associated with compromised osseointegration due to previous exposure to radiation. MATERIALS AND METHODS Titanium implants were placed in rat tibiae with or without pre-exposure to 20 Gy irradiation. Histomorphometric, biomechanical, quantitative polymerase chain reaction (qPCR) and enzyme-linked immunosorbent assay analyses were performed at 1 and 4 weeks after implantation. RESULTS The detrimental effects of irradiation were characterized by reduced bone-implant contact and removal torque. Furthermore, pre-exposure to radiation induced different molecular dysfunctions such as (i) increased expression of pro-inflammatory (Tnf) and osteoclastic (Ctsk) genes and decreased expression of the bone formation (Alpl) gene in implant-adherent cells; (ii) increased expression of bone formation (Alpl and Bglap) genes in peri-implant bone; and (iii) increased expression of pro-inflammatory (Tnf) and pro-fibrotic (Tgfb1) genes in peri-implant soft tissue. The serum levels of pro-inflammatory, bone formation and bone resorption proteins were greater in the irradiated rats. CONCLUSIONS Irradiation causes the dysregulation of multiple biological activities, among which perturbed inflammation seems to play a common role in hindering osseointegration.
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Affiliation(s)
- Omar Omar
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Louise Rydén
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | | | - Ibrahim Al-Otain
- Radiation Oncology, King Fahad Specialist Hospital, Dammam, Saudi Arabia
| | - Hussain Alhawaj
- Department of Environmental Health Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Hatem Abuohashish
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Faisal Al-Qarni
- Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Lena Emanuelsson
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Johansson
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anders Palmquist
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Peter Thomsen
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Avelino SOM, Neves RM, Sobral-Silva LA, Tango RN, Federico CA, Vegian MRC, de Almeida-Silva LA, Kaminagakura E, Amorim JBO, Vasconcellos LMR. Evaluation of the Effects of Radiation Therapy on Muscle Contractibility and Skin Healing: An Experimental Study of the Cancer Treatment Implications. Life (Basel) 2023; 13:1838. [PMID: 37763242 PMCID: PMC10532574 DOI: 10.3390/life13091838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/21/2023] [Accepted: 07/26/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND Radiotherapy can affect healthy cells, resulting in side effects. This study aimed to assess the impact of radiotherapy on soft tissue in surgical wounds in rats. METHODS The animals were divided into four groups: control (S) group without irradiation, immediate irradiation (S-IIr) group receiving irradiation right after surgery, late irradiation (S-LIr) group receiving irradiation four weeks after surgery, and early irradiation (Ir-S) group receiving irradiation before surgery. The irradiated groups underwent two fractional stages of 15 Gy. Muscle contractibility (EMG) was evaluated at two different time points, and after 2 and 7 weeks, the animals were euthanized for histological analysis of the muscles and skin. RESULTS There was no significant difference between the EMG1 and EMG2 values of the S and S-LIr groups, but both S-IIr and Ir-S groups exhibited a statistically significant difference. The S group demonstrated a larger diameter of muscle fiber compared to other groups, showing a significant difference. In terms of skin analysis, the S-IIr group had the least inflammatory infiltrate and the highest amount of red fibers, differing significantly from the other groups. CONCLUSIONS Regardless of the duration, radiotherapy was found to have effects on the surrounding soft tissues, as concluded by this study.
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Affiliation(s)
- Sarah O. M. Avelino
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - Rafael M. Neves
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - Leonardo A. Sobral-Silva
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - Rubens N. Tango
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - Claudio A. Federico
- Department of Aerospace Science and Technology, Institute of Advanced Studies, Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acacias, São José dos Campos 12228-615, SP, Brazil
| | - Mariana R. C. Vegian
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - Luis Augusto de Almeida-Silva
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - Estela Kaminagakura
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - José Benedito O. Amorim
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
| | - Luana M. R. Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), Avenida Engenheiro Francisco José Longo, 777, Jardim São Dimas, São José dos Campos 12245-001, SP, Brazil
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The Local Release of Teriparatide Incorporated in 45S5 Bioglass Promotes a Beneficial Effect on Osteogenic Cells and Bone Repair in Calvarial Defects in Ovariectomized Rats. J Funct Biomater 2023; 14:jfb14020093. [PMID: 36826892 PMCID: PMC9964758 DOI: 10.3390/jfb14020093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 01/24/2023] [Accepted: 02/01/2023] [Indexed: 02/11/2023] Open
Abstract
With the increase in the population's life expectancy, there has also been an increase in the rate of osteoporosis, which has expanded the search for strategies to regenerate bone tissue. The ultrasonic sonochemical technique was chosen for the functionalization of the 45S5 bioglass. The samples after the sonochemical process were divided into (a) functionalized bioglass (BG) and (b) functionalized bioglass with 10% teriparatide (BGT). Isolated mesenchymal cells (hMSC) from femurs of ovariectomized rats were differentiated into osteoblasts and submitted to in vitro tests. Bilateral ovariectomy (OVX) and sham ovariectomy (Sham) surgeries were performed in fifty-five female Wistar rats. After a period of 60 days, critical bone defects of 5.0 mm were created in the calvaria of these animals. For biomechanical evaluation, critical bone defects of 3.0 mm were performed in the tibias of some of these rats. The groups were divided into the clot (control) group, the BG group, and the BGT group. After the sonochemical process, the samples showed modified chemical topographic and morphological characteristics, indicating that the surface was chemically altered by the functionalization of the particles. The cell environment was conducive to cell adhesion and differentiation, and the BG and BGT groups did not show cytotoxicity. In addition, the experimental groups exhibited characteristics of new bone formation with the presence of bone tissue in both periods, with the BGT group and the OVX group statistically differing from the other groups (p < 0.05) in both periods. Local treatment with the drug teriparatide in ovariectomized animals promoted positive effects on bone tissue, and longitudinal studies should be carried out to provide additional information on the biological performance of the mutual action between the bioglass and the release of the drug teriparatide.
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Machado-Paula MM, Corat MAF, de Vasconcellos LMR, Araújo JCR, Mi G, Ghannadian P, Toniato TV, Marciano FR, Webster TJ, Lobo AO. Rotary Jet-Spun Polycaprolactone/Hydroxyapatite and Carbon Nanotube Scaffolds Seeded with Bone Marrow Mesenchymal Stem Cells Increase Bone Neoformation. ACS APPLIED BIO MATERIALS 2022; 5:1013-1024. [PMID: 35171572 DOI: 10.1021/acsabm.1c00365] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Clinically, bone tissue replacements and/or bone repair are challenging. Strategies based on well-defined combinations of osteoconductive materials and osteogenic cells are promising to improve bone regeneration but still require improvement. Herein, we combined polycaprolactone (PCL) fibers, carbon nanotubes (CNT), and hydroxyapatite (nHap) nanoparticles to develop the next generation of bone regeneration material. Fibers formed by rotary jet spinning (RJS) instead of traditional electrospinning (ES) with embedded bone marrow mesenchymal stem cells (BMMSCs) showed the best outcomes to repair rat calvarial defects after 6 weeks. To understand this, it was observed that different morphologies were formed depending on the manufacturing method used. RJS fibers presented a particular topography with rough fibers, which allowed for better cellular growth and cell spreading in vitro around and into a three-dimensional (3D) mesh, while fibers made by ES were more smooth and cellular growth was only measured on the 3D mesh surface. The fibers with incorporated nHap/CNT nanoparticles enhanced in vitro cell performance as indicated by more cellular proliferation, alkaline phosphatase activity, proliferation, and deposition of calcium. Greater bone neoformation occurred by combining three characteristics: the presence of nHap and CNT nanoparticles, the topography of the RJS fibers, and the addition of BMMSCs. RJS fibers with nanoparticles and seeded with BMMSCs showed 10 136 mm3 of bone neoformation, meaning a 10-fold increase compared to using RJS only and BMMSCs (0.853 mm3) and a 5-fold increase from using ES only (2054 mm3) after 6 weeks of implantation. Conversely, none of these approaches used individually showed any significant difference for in vivo bone neoformation, suggesting that their combination is essential for optimizing bone formation. In summary, our work generated a potential material composed of well-defined combinations of suitable scaffolds seeded with BMMSCs for enhancing numerous orthopedic tissue engineering applications.
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Affiliation(s)
- Mirian M Machado-Paula
- Institute of Research and Development, University of Vale do Paraiba, São José dos Campos, SP 12244 - 000, Brazil.,Nanomedicine Laboratory, Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States.,Multidisciplinary Center for Biological Research, State University of Campinas, Campinas, SP 13083-877, Brazil
| | - Marcus A F Corat
- Multidisciplinary Center for Biological Research, State University of Campinas, Campinas, SP 13083-877, Brazil
| | - Luana M R de Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Sao Paulo State University, Sao Jose dos Campos, Sao Paulo 12245000, Brazil
| | - Juliani C R Araújo
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Sao Paulo State University, Sao Jose dos Campos, Sao Paulo 12245000, Brazil
| | - Gujie Mi
- Nanomedicine Laboratory, Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Paria Ghannadian
- Nanomedicine Laboratory, Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Tatiane V Toniato
- Institute of Research and Development, University of Vale do Paraiba, São José dos Campos, SP 12244 - 000, Brazil
| | - Fernanda R Marciano
- Department of Physics, UFPI - Federal University of Piaui, 64049-550 Teresina, PI, Brazil
| | - Thomas J Webster
- Nanomedicine Laboratory, Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Anderson O Lobo
- Nanomedicine Laboratory, Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States.,LIMAV-Interdisciplinary Laboratory for Advanced Materials, BioMatLab, UFPI - Federal University of Piaui, 64049-550 Teresina, PI, Brazil
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Lilly GL, Petrisor D, Wax MK. Mandibular rehabilitation: From the Andy Gump deformity to jaw-in-a-day. Laryngoscope Investig Otolaryngol 2021; 6:708-720. [PMID: 34401495 PMCID: PMC8356852 DOI: 10.1002/lio2.595] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/25/2021] [Accepted: 04/17/2021] [Indexed: 12/31/2022] Open
Abstract
The mandible is a critical structure of the lower facial skeleton which plays an important role in several vital functions. Segmental resection of the mandible is at times required in patients with advanced oral cavity malignancies, primary mandibular tumors, and radiation or medication induced osteonecrosis. Mandibulectomy can significantly decrease quality of life, and thus mandibular reconstruction is an important aspect of the operative plan. Mandibular reconstruction is challenging due to the complex three-dimensional anatomy of the mandible, and the precision required to restore dental occlusion in dentate patients. Significant advances have been made over the past decade in the ability to reconstruct and rehabilitate patients after a segmental mandibulectomy. This review will highlight these advances and discuss the timing of dental implantation.
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Affiliation(s)
- Gabriela L. Lilly
- Department of Otolaryngology – Head and Neck SurgeryOregon Health and Science UniversityPortlandOregonUSA
| | - Daniel Petrisor
- Department of Oral and Maxillofacial SurgeryOregon Health and Science UniversityPortlandOregonUSA
| | - Mark K. Wax
- Department of Otolaryngology – Head and Neck SurgeryOregon Health and Science UniversityPortlandOregonUSA
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Ozcan M, Salimov F, Temmerman A, Ucak Turer O, Alkaya B, Haytac CM. Evaluation of Different Osteotomy Drilling Speed Protocols on Cortical Bone Temperature, Implant Stability and Bone Healing: An Experimental Animal Study. J ORAL IMPLANTOL 2020; 48:3-8. [PMID: 33270867 DOI: 10.1563/aaid-joi-d-20-00228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of this study was to measure the effect of drilling speed on heat generation in the cortical bone, on primary and secondary implant stability of implants and on early and late bone healing with micro-computed tomography (micro-CT). Sixty implants were placed in the iliac crest of six sheep in order to form 5 different drilling protocols: 50rpm without saline cooling, and 400rpm, 800rpm, 1200rpm and 2000rpm with saline cooling. Simultaneous cortical bone temperature and primary stability at the time of placement; secondary stability and the ratio between relative bone and tissue volume (BV/TV) in 2D and 3D in micro-CT analysis were evaluated after 4 and 8 weeks. The 50rpm group had the highest cortical bone temperature and the longest operation duration with the highest primary stability. Slightly higher values of secondary stability (T2) and subsequent 2D and 3D BV/TV values were found in 1200 rpm with irrigation at 8 weeks. All groups had sufficient ISQ values at 8 weeks for loading although the micro-CT analysis showed varying percentages of bone tissue around implants. The influence of drill speed for implant osteotomy and its irrigation is minimal when it comes to changes in temperature of the cortical bone, primary and secondary implant stability and BV/TV.
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Affiliation(s)
- Mustafa Ozcan
- Cukurova Universitesi Dis Hekimligi Fakultesi Assistant Professor Periodontology Balcali TURKEY Adana Adana 01330 Cukurova Universitesi Dis Hekimligi Fakultesi
| | - Fariz Salimov
- Cukurova University, Faculty of Dentistry, Department of Maxillofacial Surgery, Turkey
| | - Andy Temmerman
- KU Leuven University, Faculty of Dentistry, Department of Oral Health Sciences, Belgium
| | - Onur Ucak Turer
- Cukurova University, Faculty of Dentistry, Department of Periodontology, Turkey
| | - Bahar Alkaya
- Cukurova University, Faculty of Dentistry, Department of Periodontology, Turkey
| | - Cenk Mehmet Haytac
- Cukurova University, Faculty of Dentistry, Department of Periodontology, Turkey
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Soares PBF, Soares CJ, Limirio PHJO, Lara VC, Moura CCG, Zanetta-Barbosa D. Biomechanical and morphological changes produced by ionizing radiation on bone tissue surrounding dental implant. J Appl Oral Sci 2020; 28:e20200191. [PMID: 32997090 PMCID: PMC7521423 DOI: 10.1590/1678-7757-2020-0191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 08/03/2020] [Indexed: 11/21/2022] Open
Abstract
Objective: This study analyzed the effect of ionizing radiation on bone microarchitecture and biomechanical properties in the bone tissue surrounding a dental implant. Methodology: Twenty rabbits received three dental morse taper junction implants: one in the left tibia and two in the right tibia. The animals were randomized into two groups: the nonirradiated group (control group) and the irradiated group, which received 30 Gy in a single dose 2 weeks after the implant procedure. Four weeks after the implant procedure, the animals were sacrificed, and the implant/bone specimens were used for each experiment. The specimens (n=10) of the right tibia were examined by microcomputed tomography to measure the cortical volume (CtV, mm3), cortical thickness (CtTh, mm) and porosity (CtPo, %). The other specimens (n=10) were examined by dynamic indentation to measure the elastic modulus (E, GPa) and Vickers hardness (VHN, N/mm2) in the bone. The specimens of the left tibia (n=10) were subjected to pull-out tests to calculate the failure load (N), displacement (mm) up to the failure point and interface stiffness (N/mm). In the irradiated group, two measurements were performed: close, at 1 mm surrounding the implant surface, and distant, at 2.5 mm from the external limit of the first measurement. Data were analyzed using one-way ANOVA, Tukey’s test and Student’s t-test (α=0.05). Results: The irradiated bone closer to the implant surface had lower elastic modulus (E), Vickers hardness (VHN), Ct.Th, and Ct.V values and a higher Ct.Po value than the bone distant to the implant (P<0.04). The irradiated bone that was distant from the implant surface had lower E, VHN, and Ct.Th values and a higher Ct.Po value than the nonirradiated bone (P<0.04). The nonirradiated bone had higher failure loads, displacements and stiffness values than the irradiated bone (P<0.02). Conclusion: Ionizing radiation in dental implants resulted in negative effects on the microarchitecture and biomechanical properties of bone tissue, mainly near the surface of the implant.
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Affiliation(s)
| | - Carlos José Soares
- Federal University of Uberlândia, School of Dentistry, Department of Operative Dentistry and Dental Materials, Uberlândia, MG, Brasil
| | | | - Vitor Carvalho Lara
- Federal University of Triângulo Mineiro, School of Medicine, Department of Radiology, Uberaba, MG, Brasil
| | | | - Darceny Zanetta-Barbosa
- Federal University of Uberlândia, School of Dentistry, Department of Oral and Maxillofacial Surgery, Uberlândia, MG, Brasil
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