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Sadeghian Dehkord E, De Carvalho B, Ernst M, Albert A, Lambert F, Geris L. Influence of physicochemical characteristics of calcium phosphate-based biomaterials in cranio-maxillofacial bone regeneration. A systematic literature review and meta-analysis of preclinical models. Mater Today Bio 2024; 26:101100. [PMID: 38854953 PMCID: PMC11157282 DOI: 10.1016/j.mtbio.2024.101100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 06/11/2024] Open
Abstract
Objectives Calcium phosphate-based biomaterials (CaP) are the most widely used biomaterials to enhance bone regeneration in the treatment of alveolar bone deficiencies, cranio-maxillofacial and periodontal infrabony defects, with positive preclinical and clinical results reported. This systematic review aimed to assess the influence of the physicochemical properties of CaP biomaterials on the performance of bone regeneration in preclinical animal models. Methods The PubMed, EMBASE and Web of Science databases were searched to retrieve the preclinical studies investigating physicochemical characteristics of CaP biomaterials. The studies were screened for inclusion based on intervention (physicochemical characterization and in vivo evaluation) and reported measurable outcomes. Results A total of 1532 articles were retrieved and 58 studies were ultimately included in the systematic review. A wide range of physicochemical characteristics of CaP biomaterials was found to be assessed in the included studies. Despite a high degree of heterogeneity, the meta-analysis was performed on 39 studies and evidenced significant effects of biomaterial characteristics on their bone regeneration outcomes. The study specifically showed that macropore size, Ca/P ratio, and compressive strength exerted significant influence on the formation of newly regenerated bone. Moreover, factors such as particle size, Ca/P ratio, and surface area were found to impact bone-to-material contact during the regeneration process. In terms of biodegradability, the amount of residual graft was determined by macropore size, particle size, and compressive strength. Conclusion The systematic review showed that the physicochemical characteristics of CaP biomaterials are highly determining for scaffold's performance, emphasizing its usefulness in designing the next generation of bone scaffolds to target higher rates of regeneration.
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Affiliation(s)
- Ehsan Sadeghian Dehkord
- GIGA In Silico Medicine, Biomechanics Research Unit (Biomech), University of Liège, Belgium
- Prometheus, The R&D Division for Skeletal Tissue Engineering, KU Leuven, Belgium
| | - Bruno De Carvalho
- Department of Periodontology, Oral-Dental and Implant Surgery, CHU of Liège, Belgium
- Dental Biomaterials Research Unit (d-BRU), University of Liège, Belgium
| | - Marie Ernst
- Biostatistics and Research Method Center (B-STAT), CHU of Liège and University of Liège, Belgium
| | - Adelin Albert
- Biostatistics and Research Method Center (B-STAT), CHU of Liège and University of Liège, Belgium
- Department of Public Health Sciences, University of Liège, Belgium
| | - France Lambert
- Department of Periodontology, Oral-Dental and Implant Surgery, CHU of Liège, Belgium
- Dental Biomaterials Research Unit (d-BRU), University of Liège, Belgium
| | - Liesbet Geris
- GIGA In Silico Medicine, Biomechanics Research Unit (Biomech), University of Liège, Belgium
- Prometheus, The R&D Division for Skeletal Tissue Engineering, KU Leuven, Belgium
- Department of Mechanical Engineering, Biomechanics Section (BMe), KU Leuven, Belgium
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Ke Re Mu ALM, Liang ZL, Chen L, Tu Xun AKBE, A Bu Li Ke Mu MMTAL, Wu YQ. 3D printed PLGA scaffold with nano-hydroxyapatite carrying linezolid for treatment of infected bone defects. Biomed Pharmacother 2024; 172:116228. [PMID: 38320333 DOI: 10.1016/j.biopha.2024.116228] [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: 11/23/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/08/2024] Open
Abstract
BACKGROUND Linezolid has been reported to protect against chronic bone and joint infection. In this study, linezolid was loaded into the 3D printed poly (lactic-co-glycolic acid) (PLGA) scaffold with nano-hydroxyapatite (HA) to explore the effect of this composite scaffold on infected bone defect (IBD). METHODS PLGA scaffolds were produced using the 3D printing method. Drug release of linezolid was analyzed by elution and high-performance liquid chromatography assay. PLGA, PLGA-HA, and linezolid-loaded PLGA-HA scaffolds, were implanted into the defect site of a rabbit radius defect model. Micro-CT, H&E, and Masson staining, and immunohistochemistry were performed to analyze bone infection and bone healing. Evaluation of viable bacteria was performed. The cytocompatibility of 3D-printed composite scaffolds in vitro was detected using human bone marrow mesenchymal stem cells (BMSCs). Long-term safety of the scaffolds in rabbits was evaluated. RESULTS The linezolid-loaded PLGA-HA scaffolds exhibited a sustained release of linezolid and showed significant antibacterial effects. In the IBD rabbit models implanted with the scaffolds, the linezolid-loaded PLGA-HA scaffolds promoted bone healing and attenuated bone infection. The PLGA-HA scaffolds carrying linezolid upregulated the expression of osteogenic genes including collagen I, runt-related transcription factor 2, and osteocalcin. The linezolid-loaded PLGA-HA scaffolds promoted the proliferation and osteogenesis of BMSCs in vitro via the PI3K/AKT pathway. Moreover, the rabbits implanted with the linezolid-loaded scaffolds showed normal biochemical profiles and normal histology, which suggested the safety of the linezolid-loaded scaffolds. CONCLUSION Overall, the linezolid-loaded PLGA-HA scaffolds fabricated by 3D printing exerts significant bone repair and anti-infection effects.
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Affiliation(s)
- A Li Mu Ke Re Mu
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China
| | - Zhi Lin Liang
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China
| | - Linlin Chen
- Nanjing Genebios Biotechnology Co., Ltd., Nanjing 21100, China
| | - Ai Ke Bai Er Tu Xun
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China
| | | | - Yuan Quan Wu
- Orthopedics Center, First People's Hospital of Kashgar, Kashgar 844000, Xinjiang, China.
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Alsaeed MA, Al-Ghaban NM. Chitosan Nanoparticle/Simvastatin for Experimental Maxillary Bony Defect Healing: A Histological and Histomorphometrical Study. Biomimetics (Basel) 2023; 8:363. [PMID: 37622968 PMCID: PMC10452510 DOI: 10.3390/biomimetics8040363] [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: 06/25/2023] [Revised: 08/05/2023] [Accepted: 08/11/2023] [Indexed: 08/26/2023] Open
Abstract
Biomaterials such as chitosan and simvastatin (Sim) have been introduced to accelerate the extensive and multicellular biological process of bone healing. The aim of this study was to evaluate the bone healing potential of chitosan and Sim, alone or combined. Forty-two male New Zealand rabbits were divided into three groups: chitosan nanoparticles (ChN), Sim and chitosan simvastatin nanoparticles (ChSimN). Two bony defects were created in the maxillary bone. The hole on the right side received one of the experimental materials, while the other side was assigned as the control and left to heal without any intervention. Bone specimens were collected at 2 and 4 weeks and then taken for histological and histomorphometrical analyses. The histological findings revealed that ChN possessed the highest number of osteoblasts and osteoclasts at weeks 2 and osteocytes after 4 weeks. There was a significant difference between the two healing periods regarding all bone parameters across all groups. ChN stood out as the only group that had a significant difference in the count of all bone cells between the two periods, thus having the best potential in promoting bone healing.
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Affiliation(s)
- Muna Alaa Alsaeed
- Department of Oral Diagnosis, College of Dentistry University of Baghdad, Baghdad 10071, Iraq;
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Ewald A, Fuchs A, Boegelein L, Grunz JP, Kneist K, Gbureck U, Hoelscher-Doht S. Degradation and Bone-Contact Biocompatibility of Two Drillable Magnesium Phosphate Bone Cements in an In Vivo Rabbit Bone Defect Model. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4650. [PMID: 37444964 DOI: 10.3390/ma16134650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/15/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023]
Abstract
The use of bone-cement-enforced osteosynthesis is a growing topic in trauma surgery. In this context, drillability is a desirable feature for cements that can improve fracture stability, which most of the available cement systems lack. Therefore, in this study, we evaluated a resorbable and drillable magnesium-phosphate (MgP)-based cement paste considering degradation behavior and biocompatibility in vivo. Two different magnesium-phosphate-based cement (MPC) pastes with different amounts of phytic acid (IP 6) as setting retarder (MPC 22.5 and MPC 25) were implanted in an orthotopic defect model of the lateral femoral condyle of New Zealand white rabbits for 6 weeks. After explantation, their resorption behavior and material characteristics were evaluated by means of X-ray diffraction (XRD), porosimetry measurement, histological staining, peripheral quantitative computed tomography (pQCT), cone-beam computed tomography (CBCT) and biomechanical load-to-failure tests. Both cement pastes displayed comparable results in mechanical strength and resorption kinetics. Bone-contact biocompatibility was excellent without any signs of inflammation. Initial resorption and bone remodeling could be observed. MPC pastes with IP 6 as setting retardant have the potential to be a valuable alternative in distinct fracture patterns. Drillability, promising resorption potential and high mechanical strength confirm their suitability for use in clinical routine.
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Affiliation(s)
- Andrea Ewald
- Department for Functional Materials in Medicine and Dentistry, University Hospital of Wuerzburg, Pleicherwall 2, 97070 Wuerzburg, Germany
| | - Andreas Fuchs
- Department of Oral and Maxillofacial Plastic Surgery, University Hospital of Wuerzburg, Pleicherwall 2, 97070 Wuerzburg, Germany
| | - Lasse Boegelein
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital of Wuerzburg, Oberduerrbacher Street 6, 97080 Wuerzburg, Germany
| | - Jan-Peter Grunz
- Department of Diagnostic and Interventional Radiology, University Hospital of Wuerzburg, Oberduerrbacher Street 6, 97080 Wuerzburg, Germany
| | - Karl Kneist
- Department for Functional Materials in Medicine and Dentistry, University Hospital of Wuerzburg, Pleicherwall 2, 97070 Wuerzburg, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University Hospital of Wuerzburg, Pleicherwall 2, 97070 Wuerzburg, Germany
| | - Stefanie Hoelscher-Doht
- Department of Trauma, Hand, Plastic and Reconstructive Surgery, University Hospital of Wuerzburg, Oberduerrbacher Street 6, 97080 Wuerzburg, Germany
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Jacob RGM, Ervolino da Silva AC, Chaushu L, Lang NP, Borges Duailibe de Deus C, Botticelli D, Rangel Garcia Júnior I. Evaluation of Two Configurations of Hydroxyapatite and Beta-Tricalcium Phosphate in Sinus Grafts with Simultaneous Implant Installation: An Experimental Study in Rabbits. Dent J (Basel) 2023; 11:121. [PMID: 37232771 PMCID: PMC10217008 DOI: 10.3390/dj11050121] [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: 03/08/2023] [Revised: 04/20/2023] [Accepted: 04/28/2023] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND This study aimed to evaluate peri-implant bone formation in rabbits after sinus grafting mediated by hydroxyapatite and beta-tricalcium phosphate (HA + β-TCP) in granule or paste configurations, concomitant with immediate implant installation. MATERIAL & METHODS Thirty-four rabbit maxillary sinuses were grafted with HA + β-TCP, half of which were applied in a granule and half in a paste composition. Implant placement was performed simultaneously. At 7 and 40 days postoperatively, the animals were euthanized, and samples were prepared for tomographic, microtomographic, histological, histometric (hematoxylin and eosin staining, HE), and immunohistochemical (labeling of transcription factor Runx-2 [RUNX2], vascular endothelial growth factor [VEGF], osteocalcin [OCN], and tartrate-resistant acid phosphatase [TRAP]) analysis. Implant removal torque was also measured. RESULTS On tomography, maintenance of sinus membrane integrity was observed in both the groups. Higher values of morphometric parameters evaluated by micro-CT were found in the "paste group" after seven days. At 40 days, there were no significant differences between the groups in most of the microtomographic parameters evaluated. In histological sections stained with HE, a higher percentage of newly formed bone was observed in the "granule group" after 40 days. Similar positive immunolabeling was observed for both RUNX2 and OCN in both the experimental groups. TRAP immunolabeling was similar in both groups as well. VEGF labeling increased in the "granule group", indicating a higher osteoconductive potential in this biomaterial. Similar removal torque values were observed in both groups. Thus, the two HA + β-TCP configurations showed similar healing patterns of simultaneously installed implants adjacent to sinus floor elevation. However, significantly higher bone values were observed for the "granule configuration". CONCLUSIONS The HA + β-TCP granules and paste presentations showed favorable long-term healing results, with bone formation in similar quantities and quality adjacent to the implants.
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Affiliation(s)
- Ricardo Garcia Mureb Jacob
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba 16015-050, SP, Brazil; (R.G.M.J.); (A.C.E.d.S.); (C.B.D.d.D.); (I.R.G.J.)
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba 16015-050, SP, Brazil
| | - Ana Cláudia Ervolino da Silva
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba 16015-050, SP, Brazil; (R.G.M.J.); (A.C.E.d.S.); (C.B.D.d.D.); (I.R.G.J.)
| | - Liat Chaushu
- Department of Periodontology and Implant Dentistry, The Maurice and Gabriela Goldschleger School of Dentistry, Tel Aviv University, Tel Aviv 69978, Israel;
| | - Niklaus Peter Lang
- School of Dental Medicine, University of Berne, CH-3010 Berne, Switzerland
| | - Ciro Borges Duailibe de Deus
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba 16015-050, SP, Brazil; (R.G.M.J.); (A.C.E.d.S.); (C.B.D.d.D.); (I.R.G.J.)
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba 16015-050, SP, Brazil
| | | | - Idelmo Rangel Garcia Júnior
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Araçatuba 16015-050, SP, Brazil; (R.G.M.J.); (A.C.E.d.S.); (C.B.D.d.D.); (I.R.G.J.)
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Fontes J, Martin VZ, Resende M, Colaço B, Gomes PDS, Amarante JM. Effect of Splinting on Orthodontic Mini-Implant Tipping and Bone Histomorphometric Parameters: An In Vivo Animal Model Study. J Funct Biomater 2023; 14:jfb14050239. [PMID: 37233349 DOI: 10.3390/jfb14050239] [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: 03/30/2023] [Revised: 04/17/2023] [Accepted: 04/22/2023] [Indexed: 05/27/2023] Open
Abstract
This study aimed to address the stability of orthodontic mini-implants submitted to an immediate orthodontic functional load, in splinted or unsplinted conditions, further characterizing the histomorphometric parameters of the neighboring bone tissue, in an in vivo experimental model. Mini-implants (1.4 × 6.0 mm) were placed in the proximal tibia of New Zealand White rabbits and immediately loaded with a 150 g force. Tissue healing was characterized within 8 weeks. Microtomography was used to assess the mini-implants' tipping and bone histomorphometric indexes. Loaded implants were evaluated in splinted and unsplinted conditions, with data being compared to that of unloaded mini-implants with the Kruskal-Wallis nonparametric test, followed by Dunn's multiple comparison tests. The splinting of mini-implants submitted to immediate orthodontic loading significantly reduced the tipping to levels similar to those of unloaded mini-implants. Immediate loading further increased the histomorphometric indexes associated with bone formation at the peri-implant region, in both splinted and unsplinted conditions, with no significant differences between the tension and compression regions. Accordingly, within this experimental setting, splinting was found to lessen tipping and mini-implants' displacement, without affecting the increased bone formation at the peri-implant region, induced by a functional orthodontic load.
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Affiliation(s)
- Joana Fontes
- Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal
| | - Victor Zacharias Martin
- BoneLab-Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal
- LAQV/REQUIMTE-Laboratório Associado para a Química Verde/Rede de Química e Tecnologia, University of Porto, 4100-007 Porto, Portugal
| | - Marta Resende
- Faculty of Dental Medicine, University of Porto, 4200-393 Porto, Portugal
| | - Bruno Colaço
- LAQV/REQUIMTE-Laboratório Associado para a Química Verde/Rede de Química e Tecnologia, University of Porto, 4100-007 Porto, Portugal
- Department of Zootechnics, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Center for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), 5000-801 Vila Real, Portugal
| | - Pedro de Sousa Gomes
- BoneLab-Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal
- LAQV/REQUIMTE-Laboratório Associado para a Química Verde/Rede de Química e Tecnologia, University of Porto, 4100-007 Porto, Portugal
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Contact Guidance Mediated by Hybrid Thread Topography Enhances Osseointegration of As-machined Ti6Al4V Dental Implant. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2023. [DOI: 10.1007/s40883-023-00293-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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A comparative histological study of the effect of TheraCal LC and biodentine on direct pulp capping in rabbits: an experimental study. Clin Oral Investig 2023; 27:1013-1022. [PMID: 35947203 PMCID: PMC9985587 DOI: 10.1007/s00784-022-04658-9] [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: 05/03/2022] [Accepted: 07/30/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES This study histologically compared the effect of TheraCal LC and biodentine on direct pulp capping using a rabbit model. MATERIALS AND METHODS A direct pulp capping procedure was performed on 40 mandibular central incisors of 20 healthy, male New Zealand white rabbits. TheraCal LC and biodentine were applied to exposed pulp and 10 randomly selected rabbits were euthanized after the first and second week. Incisors were extracted and prepared for histological processing and examination to check the dentine bridge thickness, continuity, and extent of pulp inflammation. A blinded data analysis was performed, and groups were compared using a Wilcoxon signed-rank test while changes across time within each group were assessed using the Mann-Whitney U test. RESULTS When comparing the dentine bridge thickness, biodentine showed a significantly thicker dentine bridge in the first and second week (mean 28.16 µm, 33.66 µm), while TheraCal LC showed a dentine bridge in the second week only (mean 15.93 µm). Regarding dentine bridge continuity, biodentine showed a significantly better dentine bridge in the first week. Additionally, there was no difference in the second week. Furthermore, there was no statistically significant difference between each of the materials regarding the extent of inflammation. CONCLUSIONS Biodentine in vivo showed better results concerning thickness and continuity of the dentine bridge after direct pulp capping in rabbit incisors. Both biodentine and TheraCal LC had a similar inflammatory effect on the pulp. CLINICAL RELEVANCE Biodentine is more successful as a direct pulp capping material compared to TheraCal LC.
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Zhu F, Liu W, Li P, Zhao H, Deng X, Wang HL. Electric/Magnetic Intervention for Bone Regeneration: A Systematic Review and Network Meta-Analysis. TISSUE ENGINEERING. PART B, REVIEWS 2023. [PMID: 36170583 DOI: 10.1089/ten.teb.2022.0127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Electric/magnetic material or field is a promising strategy for bone regeneration. The aim of this systematic review and network meta-analysis was to analyze the evidence regarding the efficacy of electric and magnetic intervention for bone regeneration and provide directions for further research. A comprehensive search was performed to identify the rats/rabbits/mice research that involved the electric/magnetic treatment with quantitative radiographic assessment of bone formation. Network meta-analyses were also conducted to assess different interventions and outcomes for osteogenesis. In total, there were 51 articles included in the systematic review and 19 articles in the network meta-analyses. The majority used microcomputerized tomography bone volume/tissue volume (BV/TV) to evaluate outcomes in rats. Results showed that placing electric/magnetic materials in situ had more prominent effects than the electric/magnetic field on bone regeneration. For all species, electrical materials with zeta potential of -53 mV proved to be the most effective in increasing BV (mean difference [MD]: 4.20 mm3, 95% confidence interval [CI]: [1.72-6.68]) and bone mineral density (MD: 312 mg/cm3, 95% CI: [172.43-451.57]). Magnetic materials with external magnetic fields topped in BV/TV (MD: 43%, 95% CI: [36.04-49.96]). It also led in trabecular number (MD: 2.00 mm-1, 95% CI: [1.45-2.55]), trabecular thickness (MD: 61.00 μm, 95% CI: [44.31- 77.69]), and trabecular separation (MD: -0.40 mm, 95% CI: [-0.56 to -0.24]) on the condition of lacking electric materials. Biomaterials implantation is the most effective method for stimulating osteogenesis in rats, especially in electrical materials with negative charge. The combination of diverse interventions shows promising effects but needs further research, so does the underlying mechanism. Impact Statement Bone defect, especially for the large defect from aging, trauma, or pathology, which cannot be completely healed, remains a clinical challenge. Mimicking physical microenvironment has emerged as a new strategy for tissue regeneration. Electric and magnetic material and field used as the physical stimulation for bone regeneration have attracted interest due to their potential and facile application in clinic. This article reviewed related animal studies and carried out a network meta-analysis to thoroughly understand how electric and magnetic interventions impacted on tissues and created an osteogenic microenvironment.
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Affiliation(s)
- Fangyu Zhu
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Wenwen Liu
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China.,Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Pei Li
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Han Zhao
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xuliang Deng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, China
| | - Hom-Lay Wang
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
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Hydrothermal Synthesis of Fluorapatite Coatings over Titanium Implants for Enhanced Osseointegration-An In Vivo Study in the Rabbit. J Funct Biomater 2022; 13:jfb13040241. [PMID: 36412882 PMCID: PMC9680447 DOI: 10.3390/jfb13040241] [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: 10/19/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
This work aims at the development and characterization of fluorapatite coatings, innovatively prepared by the hydrothermal method, aiming for enhanced osseointegration of titanium implants. Fluoride-containing coatings were prepared and characterized by scanning and transmission electron microscopy, Fourier-transform infrared spectroscopy-attenuated total reflectance, and X-ray photoelectron spectroscopy. The biological response was characterized by microtomographic evaluation and histomorphometric analysis upon orthotopic implantation in a translational rabbit experimental model. Physic-chemical analysis revealed the inclusion of fluoride in the apatite lattice with fluorapatite formation, associated with the presence of citrate species. The in vivo biological assessment of coated implants revealed an enhanced bone formation process-with increased bone-to-implant contact and bone volume. The attained enhancement of the osteogenic process may be attributable to the conjoined modulatory activity of selected fluoride and citrate levels within the produced coatings. In this regard, the production of fluorapatite coatings with citrate, through the hydrothermal method, entails a promising approach for enhanced osseointegration in implant dentistry and orthopedic applications.
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Özmeriç N, Çakal GÖ, Gökmenoğlu C, Özmeriç A, Oduncuoğlu BF, Hacaloğlu T, Kaftanoğlu B. Histomorphometric and biomechanical evaluation of the osseointegration around micro- and nano-level boron-nitride coated titanium dental implants. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2022; 123:e694-e700. [PMID: 35724866 DOI: 10.1016/j.jormas.2022.06.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/08/2022] [Accepted: 06/16/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Titanium dental implants has been coated with different materials such as polymers and biomimetic agents, bone morphogenetic protein, calcium phosphate to enhance surface properties of the titanium implants for osseointegration. The aim of this study was to evaluate the bone tissue healing around Boron Nitride-coated (BN-coated) titanium implants histomorphometrically and biomechanically and also observe the effect of different coating thicknesses on osseointegration. MATERIALS AND METHODS BN was coated on dental titanium implants with two different coating thicknesses by using RF magnetron sputtering system. Totally fifty-four implants were inserted into the tibias' of 12 New Zealand rabbits bilaterally under general anesthesia. All animals were sacrificed after 4-weeks. Bone-implant contact (BIC) and new bone area/total area ratios (BATA) were calculated. Also, the removal torque (RT) test was performed. RESULTS The highest new bone area in the medullary cavity was around the nano-BN-coated surface with 15.70%. In micro-BN-coated surface and control group, this ratio was determined as 10.48% and 8.23%, respectively. The BIC ratios in upper-side of implants and cortical-associated BIC ratios in lower-side were found significantly higher in control and micro-BN-coated group than nano-BN-coated group (p < 0.05). Similar BIC values were observed between control and micro-BN-coated groups (p > 0.05). BATA values did not show statistically significant differences between all three groups (p > 0.05). The RT values measured in all groups were found comparable and no statistically significant differences were found (p > 0.05). CONCLUSION No inflammatory reaction developed around any implant. Relatively more new bone formation around nano-BN-coated titanium implants indicates the promising osseoinductive effect of BN coating. BN-coated implants showed similar biomechanical and histomorphometrical outcomes to that of the conventional titanium implants through a 4-week evaluation period.
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Affiliation(s)
- Nurdan Özmeriç
- Department of Periodontology, Faculty of Dentistry, Gazi University, Bişkek Caddesi, 06510 Ankara, Turkey
| | - Gaye Özgür Çakal
- Institute of Nuclear Sciences, Ankara University, Tandoğan Campus, 06100 Ankara, Turkey
| | - Ceren Gökmenoğlu
- Department of Periodontology, Faculty of Dentistry, Ordu University, 52100, Ordu, Turkey.
| | - Ahmet Özmeriç
- Department of Orthopedics and Traumatology, SBU Ankara Training and Research Hospital, 06340 Ankara, Turkey
| | - Bahar Füsun Oduncuoğlu
- Department of Periodontology, Faculty of Dentistry, Baskent University, 06590 Ankara, Turkey
| | - Tuğçe Hacaloğlu
- Department of Manufacturing Engineering, Atilim University, Kizilcasar Mah 06836 Ankara, Turkey
| | - Bilgin Kaftanoğlu
- Department of Manufacturing Engineering, Atilim University, Kizilcasar Mah 06836 Ankara, Turkey
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12
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Kim UG, Choi JY, Lee JB, Yeo ISL. Platelet-rich plasma alone is unable to trigger contact osteogenesis on titanium implant surfaces. Int J Implant Dent 2022; 8:25. [PMID: 35666399 PMCID: PMC9170848 DOI: 10.1186/s40729-022-00427-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 05/31/2022] [Indexed: 11/10/2022] Open
Abstract
PURPOSE Osseointegration consists of bidirectional bone formation around modified implant surfaces by contact osteogenesis and distance osteogenesis. This study tested whether contact osteogenesis on the surface of a modified titanium (Ti) implant is stimulated by cytokines in the blood. METHODS In the first two types of experiments, sandblasted, large-grit, acid-etched Ti implants and turned Ti tubes were inserted into rabbit tibiae. To exclude the influence of distance osteogenesis, the tubes were inserted into the tibiae, and implants were placed inside the tubes. In a third type of experiment, the implants and tubes were inserted into the rabbit tibiae, and platelet-rich plasma (PRP) or recombinant human bone morphogenetic protein-2 (rhBMP-2) was applied topically. Four weeks after implantation, undecalcified specimens were prepared for histomorphometry. Bone-to-implant contact (BIC) and bone area per tissue (BA) were measured, and the data were analysed using one-way ANOVA at a significance level of 0.05. RESULTS When the response of bone to Ti tubes with implants was compared to that without implants (first experiment), little bone formation was found inside the tubes. The mean BIC of implant specimens inside the tubes was 21.41 ± 13.81% in a second experiment that evaluated bone responses to implants with or without Ti tubes. This mean BIC value was significantly lower than that in the implant-only group (without tubes) (47.32 ± 12.09%, P = 0.030). The third experiment showed that rhBMP-2 significantly increased contact osteogenesis on the implant surface, whereas PRP had no effect (mean BIC: 66.53 ± 14.06% vs. 16.34 ± 15.98%, P = 0.004). CONCLUSIONS Platelet-rich plasma alone is unable to trigger contact osteogenesis on the modified titanium implant surface.
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Affiliation(s)
- Ung-Gyu Kim
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University, 101 Daehak-ro, Jongro-gu, Seoul, 03080, Korea
| | - Jung-You Choi
- Dental Research Institute, Seoul National University, Seoul, Korea
| | - Jun-Beom Lee
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea
| | - In-Sung Luke Yeo
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University, 101 Daehak-ro, Jongro-gu, Seoul, 03080, Korea. .,Dental Research Institute, Seoul National University, Seoul, Korea.
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Van Erk M, Van Luijk J, Yang F, Leeuwenburgh SCG, Sánchez‐Fernández MJ, Hermans E, Félix Lanao RP, Van Goor H. A systematic review and meta-analyses on animal models used in bone adhesive research. J Orthop Res 2022; 40:624-633. [PMID: 33871061 PMCID: PMC9290478 DOI: 10.1002/jor.25057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 01/19/2021] [Accepted: 04/12/2021] [Indexed: 02/04/2023]
Abstract
Currently, steel implants are used for osteosynthesis of (comminuted) fractures and intra-articular bone defects. These osteosyntheses can sometimes be complicated procedures and can have several drawbacks including stress shielding of the bone. A bone glue might be a safe and effective alternative to current materials. Despite numerous animal studies on bone adhesives, no such material is clinically applied yet. We have conducted a systematic review to summarize the evidence in experimental animal models used in research on bone adhesive materials for trauma and orthopedic surgery. Additionally, we analysed the efficacy of the different bone adhesives for different experimental designs. A heterogeneity in experimental parameters including animal species, defect types, and control measurements resulted in a wide variety in experimental models. In addition, no standard outcome measurements could be identified. Meta-analysis on bone regeneration between adhesive treatment and nonadhesive treatment showed a high heterogeneity and no statistically significant overall effect (M: -0.71, 95% confidence interval [CI]: -1.63-0.21, p = 0.13). Besides, currently there is not enough evidence to draw conclusions based on the effectiveness of the individual types of adhesives or experimental models. A positive statistically significant effect was found for the adhesive treatment in comparison with conventional osteosynthesis materials (M: 2.49, 95% CI: 1.20-3.79, p = 0.0002). To enhance progression in bone adhesive research and provide valuable evidence for clinical application, more standard experimental parameters and a higher reporting quality in animal studies are needed. Statement of Clinical Significance: Current materials restoring anatomical alignments of bones have several drawbacks. A (biodegradable) adhesive for fixating bone defects can be a treatment breakthrough. Although numerous bone adhesives have been researched, most seemed to fail at the preclinical stage. An overview in this field is missing. This systematic review highlights the relevant parameters for design of experimental bone adhesive studies. It demonstrates evidence regarding benefit of bone adhesives but also that the quality of reporting and the risk of bias in studies need to be improved. The results will aid in designing better quality animal studies for bone adhesive research with higher translational value.
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Affiliation(s)
- Machteld Van Erk
- Department of SurgeryRadboud University Medical CentreNijmegenThe Netherlands
| | - Judith Van Luijk
- Department for Health Evidence, SYstematic Review Centre for Laboratory Animal Experimentation (SYRCLE)Radboud University Medical CentreNijmegenThe Netherlands
| | - Fang Yang
- Department of Regenerative BiomaterialsRadboud University Medical CentreNijmegenThe Netherlands
| | | | | | - Erik Hermans
- Department of SurgeryRadboud University Medical CentreNijmegenThe Netherlands
| | - Rosa P. Félix Lanao
- Department of SurgeryRadboud University Medical CentreNijmegenThe Netherlands,GATT Technologies B.V.NijmegenThe Netherlands
| | - Harry Van Goor
- Department of SurgeryRadboud University Medical CentreNijmegenThe Netherlands
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14
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Hapsari NP, Bangun K, Atmodiwirjo P, Ponco B, Dewi TIT, Halim J. The Effect of Perichondrium and Graft Modification on the Viability of Conchal Cartilage Graft: An Experimental Study in Rabbit. Cleft Palate Craniofac J 2022; 59:149-155. [PMID: 33736485 DOI: 10.1177/1055665621998173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE Cartilage grafts are widely used in reconstructing nasal deformity for structural and aesthetic purposes. Despite being immunologically privileged, cartilage grafts are susceptible to volume loss with high risk of resorption over time. Therefore, experts opt for cartilage handling modification to resolve this issue through graft dicing, wrapping, or perichondrium preservation. This study will evaluate the effect cartilage graft preparations on graft viability. DESIGN Single-randomized post-test-only study design. SETTING Animal Hospital at Bogor Agricultural Institute. PARTICIPANTS Six New Zealand, male, Hycole rabbits. INTERVENTION Conchal cartilage grafts were retrieved from 6 experimental rabbits and distributed into 3 treatment groups: diced cartilage graft (DC; control), one-sided perichondrium-attached scored cartilage (OPSC), and tube-shaped perichondrium-wrapped diced cartilage (TPDC). MAIN OUTCOME MEASURES Macroscopic (weight and contour) and microscopic (chondroblast proliferation, graft thickness, apoptotic cells) evaluation through histological measures were recorded on week 12. Statistical analysis was done to compare between groups. RESULTS Diced cartilage and OPSC groups showed significant weight changes on week 12 (P < .05) with OPSC presenting with the biggest difference. Diced cartilage and OPSC group showed moderate cell proliferation on week 12 while TPDC displayed most abundant apoptotic cells (5.8%; P < .05). Diced cartilage group had the highest cartilage thickness ratio (P < .05). DISCUSSION Bare DC technique promoted graft thickness while perichondrium-attached scored cartilage showed the most abundant chondroblast proliferation and the least apoptotic cells. Perichondrium contributes to enhanced new cartilage formation. CONCLUSION Diced cartilage graft is suitable for masking irregularity and volume augmentation, while perichondrium-attached cartilage graft is better for structural support in nasal reconstruction.
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Affiliation(s)
- Nathania Pudya Hapsari
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Cleft and Craniofacial Center, 95338Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Kristaninta Bangun
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Cleft and Craniofacial Center, 95338Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Parintosa Atmodiwirjo
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Cleft and Craniofacial Center, 95338Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Bambang Ponco
- Department of Pathology Anatomy, Faculty of Veterinary Medicine, 360978Bogor Agricultural University, Bogor, Indonesia
| | - Tri Isyani Tungga Dewi
- Faculty of Veterinary Medicine, Veterinary Teaching Hospital, 360978Bogor Agricultural University, Bogor, Indonesia
| | - Jessica Halim
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Cleft and Craniofacial Center, 95338Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
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15
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Gehrke SA, Aramburú Júnior J, Treichel TLE, Rodriguez F, N de Aza P, Dedavid BA. Comparative evaluation of two collagen-based biomaterials with different compositions used for bone graft: An experimental animal study. J Appl Biomater Funct Mater 2022; 20:22808000221119650. [PMID: 35975914 DOI: 10.1177/22808000221119650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A large number of materials with different compositions and shapes have been proposed and studied for the purpose of bone tissue regeneration. Collagen-based materials have shown promising results for this application, with improved physicochemical properties. The aim of the present in vivo animal study was to evaluate and compare two commercially available collagen-based biomaterials for bone regeneration, with these being implanted in circumferential bone defects created in the calvarium of rabbits. Twenty rabbits received bilateral parietal osteotomies, performed with the aid of a 6.5 mm diameter trephine. Two groups were created: the BC group, where the defect was filled with a scaffold composed of 90% bovine bone particles and 10% porcine collagen, and the EG group, where the defect was filled with a scaffold composed of 75% hydroxyapatite particles of bovine origin and 25% bovine collagen. Ten animals were sacrificed at 30 days and another 10 at 45 days after implantation, and the samples were processed and histologically analyzed. In the evaluations of the samples at 30 days, no important differences were found in the results. However, in the samples at 45 days after surgery, the EG group showed better results than the BC group samples, mainly in terms of the amount of bone matrix formation (P < 0.0001) and the volume in area measured in each sample, where the EG group had a value 65% higher than that in the BC group samples. Based on the results obtained, we conclude that the amount of collagen and the particle characteristics present in the composition of the scaffolds can directly influence the amount of neoformation and/or bone regeneration.
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Affiliation(s)
- Sergio Alexandre Gehrke
- Department of Research, Bioface/PgO/UCAM, Montevideo, Uruguay.,Department of Biotechnology. Universidad Católica de Murcia (UCAM), Murcia, Spain.,Instituto de Bioingenieria, Universidad Miguel Hernández, Elche (Alicante), Spain.,Department of Materials Engineering, Pontificia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | | | - Piedad N de Aza
- Instituto de Bioingenieria, Universidad Miguel Hernández, Elche (Alicante), Spain
| | - Berenice Anina Dedavid
- Department of Materials Engineering, Pontificia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
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16
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Gehrke SA, Júnior JA, Eirles Treichel TL, Dedavid BA. Biomechanical and histological evaluation of four different implant macrogeometries in the early osseointegration process: An in vivo animal study. J Mech Behav Biomed Mater 2021; 125:104935. [PMID: 34736028 DOI: 10.1016/j.jmbbm.2021.104935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/16/2021] [Accepted: 10/25/2021] [Indexed: 12/16/2022]
Abstract
This study aims to evaluate the effects of implant macrogeometry on the early period of the osseointegration process, comparing four different implant models through biomechanical and histological analysis after implantation in rabbit tibiae. Twenty New Zealand rabbits were used, evaluated at two different times (21 and 28 days) after installation of the implant. Eighty implants with different macrogeometries were used, forming four groups (n = 20 per group): cylindrical implants Ø4.1 mm and 8 mm in length (STRc group); cylindrical-conical implants Ø4.1 mm and 8 mm in length (STRt group); tapered implants Ø4.3 mm and 8 mm in length (NOBt group); and tapered implants with healing chambers Ø4.0 mm and 8 mm in length (MAEt group). Ten samples from each group were analyzed at each proposed time. The initial implant stability quotient (ISQ) was measured by resonance frequency analysis, both at the time of installation and at the time of sacrifice. In the histological sections, the percentage of bone-implant contact (BIC%), newly formed bone, osteoid matrix, and medullary spaces were measured in the pre-determined cortical and medullary bone portion for each sample. The three tapered implant groups (STRt, NOBt, and MAEt) showed higher values for the analyzed parameters in the early osseointegration period, in comparison with the cylindrical implant group (STRc). In all parameters, the three tapered groups showed no difference (p > 0.05); however, all three tapered groups presented significant differences, when compared to the cylindrical group (p < 0.05). No correlation was detected between the parameters analyzed. Within the limitations of the present study, in all parameters analyzed, the tapered implants demonstrated greater results when compared to the cylindrical implants.
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Affiliation(s)
- Sergio Alexandre Gehrke
- Department of Biotechnology, Universidad Católica de Murcia, 30107, Murcia, Spain; Department of Research, Biotecnos - Technology and Science, 11100, Montevideo, Uruguay.
| | | | | | - Berenice Anina Dedavid
- Department of Materials Engineering, Pontificia Universidade Católica do Rio Grande do Sul, 90619-900, Porto Alegre, Brazil.
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Blanc-Sylvestre N, Bouchard P, Chaussain C, Bardet C. Pre-Clinical Models in Implant Dentistry: Past, Present, Future. Biomedicines 2021; 9:1538. [PMID: 34829765 PMCID: PMC8615291 DOI: 10.3390/biomedicines9111538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/11/2021] [Accepted: 10/15/2021] [Indexed: 12/23/2022] Open
Abstract
Biomedical research seeks to generate experimental results for translation to clinical settings. In order to improve the transition from bench to bedside, researchers must draw justifiable conclusions based on data from an appropriate model. Animal testing, as a prerequisite to human clinical exposure, is performed in a range of species, from laboratory mice to larger animals (such as dogs or non-human primates). Minipigs appear to be the animal of choice for studying bone surgery around intraoral dental implants. Dog models, well-known in the field of dental implant research, tend now to be used for studies conducted under compromised oral conditions (biofilm). Regarding small animal models, research studies mostly use rodents, with interest in rabbit models declining. Mouse models remain a reference for genetic studies. On the other hand, over the last decade, scientific advances and government guidelines have led to the replacement, reduction, and refinement of the use of all animal models in dental implant research. In new development strategies, some in vivo experiments are being progressively replaced by in vitro or biomaterial approaches. In this review, we summarize the key information on the animal models currently available for dental implant research and highlight (i) the pros and cons of each type, (ii) new levels of decisional procedures regarding study objectives, and (iii) the outlook for animal research, discussing possible non-animal options.
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Affiliation(s)
- Nicolas Blanc-Sylvestre
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Philippe Bouchard
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Catherine Chaussain
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Reference Center for Rare Disorders of the Calcium and Phosphate Metabolism, Dental Medicine Department, Bretonneau Hospital, GHN-Université de Paris, 75018 Paris, France
| | - Claire Bardet
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
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18
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Fuchs A, Kreczy D, Brückner T, Gbureck U, Stahlhut P, Bengel M, Hoess A, Nies B, Bator J, Klammert U, Linz C, Ewald A. Bone regeneration capacity of newly developed spherical magnesium phosphate cement granules. Clin Oral Investig 2021; 26:2619-2633. [PMID: 34686919 PMCID: PMC8898248 DOI: 10.1007/s00784-021-04231-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/13/2021] [Indexed: 01/27/2023]
Abstract
OBJECTIVES Magnesium phosphate-based cements begin to catch more attention as bone substitute materials and especially as alternatives for the more commonly used calcium phosphates. In bone substitutes for augmentation purposes, atraumatic materials with good biocompatibility and resorbability are favorable. In the current study, we describe the in vivo testing of novel bone augmentation materials in form of spherical granules based on a calcium-doped magnesium phosphate (CaMgP) cement. MATERIALS AND METHODS Granules with diameters between 500 and 710 μm were fabricated via the emulsification of CaMgP cement pastes in a lipophilic liquid. As basic material, two different CaMgP formulations were used. The obtained granules were implanted into drill hole defects at the distal femoral condyle of 27 New Zealand white rabbits for 6 and 12 weeks. After explantation, the femora were examined via X-ray diffraction analysis, histological staining, radiological examination, and EDX measurement. RESULTS Both granule types display excellent biocompatibility without any signs of inflammation and allow for proper bone healing without the interposition of connective tissue. CaMgP granules show a fast and continuous degradation and enable fully adequate bone regeneration. CONCLUSIONS Due to their biocompatibility, their degradation behavior, and their completely spherical morphology, these CaMgP granules present a promising bone substitute material for bone augmentation procedures, especially in sensitive areas. CLINICAL RELEVANCE The mostly insufficient local bone supply after tooth extractions complicates prosthetic dental restoration or makes it even impossible. Therefore, bone augmentation procedures are oftentimes inevitable. Spherical CaMgP granules may represent a valuable bone replacement material in many situations.
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Affiliation(s)
- Andreas Fuchs
- Department of Oral & Maxillofacial Plastic Surgery, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany.
| | - Dorothea Kreczy
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Theresa Brückner
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Philipp Stahlhut
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Melanie Bengel
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Andreas Hoess
- INNOTERE GmbH, Meissner Strasse 191, 01445, Radebeul, Germany
| | - Berthold Nies
- INNOTERE GmbH, Meissner Strasse 191, 01445, Radebeul, Germany
| | - Julia Bator
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Uwe Klammert
- Department of Oral & Maxillofacial Plastic Surgery, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Christian Linz
- Department of Oral & Maxillofacial Plastic Surgery, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
| | - Andrea Ewald
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
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Abdul-Monem MM, Kamoun EA, Ahmed DM, El-Fakharany EM, Al-Abbassy FH, Aly HM. Light-cured hyaluronic acid composite hydrogels using riboflavin as a photoinitiator for bone regeneration applications. J Taibah Univ Med Sci 2021; 16:529-539. [PMID: 34408610 PMCID: PMC8348264 DOI: 10.1016/j.jtumed.2020.12.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 12/27/2022] Open
Abstract
Objective Self-healing of bone from damage caused by infection, trauma, or surgical removal of cysts is limited. Generally, external intervention is needed to increase bone repair and regeneration. In this study, biocompatible light-cured hyaluronic acid hydrogels loaded with nano-hydroxyapatite and chitosan were prepared using a new photoinitiating system based on riboflavin for bone regeneration applications. Method Four light-cured hydrogel groups were prepared as follows: Group I, a control group with no additions; Group II, loaded with nano-hydroxyapatite; Group III, loaded with chitosan; and Group IV, loaded with both nano-hydroxyapatite and chitosan. The new photoinitiating system consisted of riboflavin as a photoinitiator, dimethylaminoethyl methacrylate (DMAEMA) as a coinitiator (being used with riboflavin for the first time), and diphenyliodonium chloride as an accelerator. For each group, X-ray-diffraction, surface morphology by scanning electron microscope, mechanical properties, water uptake (%), and cell viability (%) were tested. The osteogenic potential was then tested in a rabbit model, and histomorphometric assessment was conducted. Results In the four groups, the light-cured hydrogels were obtained after a short irradiation time of 10 s using a dental light-curing unit. The prepared hydrogels were biocompatible. Simultaneous addition of nano-hydroxyapatite and chitosan increased the mechanical properties threefold and the osteogenic potential, twofold, with a statistically significant difference compared with the control group. Conclusions Light-cured hyaluronic acid composite hydrogels loaded with nano-hydroxyapatite and chitosan—prepared by using the new photoinitiating system—are promising materials that can be used in bone regeneration applications.
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Affiliation(s)
| | - Elbadawy A Kamoun
- Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications, Egypt
| | - Dawlat M Ahmed
- Dental Biomaterials Department, Faculty of Dentistry, Alexandria University, Egypt
| | - Esmail M El-Fakharany
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications, Egypt
| | - Fayza H Al-Abbassy
- Dental Biomaterials Department, Faculty of Dentistry, Alexandria University, Egypt
| | - Hanaa M Aly
- Oral Biology Department, Faculty of Dentistry, Alexandria University, Egypt
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20
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Jun JH, Oh KC, Park KH, Jung N, Li J, Moon HS. Improvement of Osseointegration by Ultraviolet and/or Simvastatin Treatment on Titanium Implants with or without Bone Graft Materials. MATERIALS 2021; 14:ma14133707. [PMID: 34279277 PMCID: PMC8269879 DOI: 10.3390/ma14133707] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/23/2021] [Accepted: 06/26/2021] [Indexed: 12/21/2022]
Abstract
We evaluated and compared ultraviolet (UV) treatment and simvastatin (SIM) immersion effects on the osseointegration of sandblasted, large-grit, acid-etched (SLA) titanium dental implants at two different time points in rabbit tibias, with or without xenogenic bone graft materials. The surface alteration on simvastatin treatment titanium discs was analyzed using an infrared spectrometer. Implants were categorized into four groups according to the surface treatment type. Twelve rabbits received two implants per tibia. A tibial defect model was created using a trephine bur, with implants in contact with the bone surface and bovine bone graft materials for gap filling. The rabbits were sacrificed after 2 or 4 weeks. UV treatment or SIM immersion increased the bone-to-implant contact (BIC) on nongrafted sides, and both increased the BIC and bone area (BA) on grafted sides. The application of both treatments did not result in higher BIC or BA than a single treatment. At two different time points, BIC in the nongrafted sides did not differ significantly among the UV and/or SIM treated groups, whereas BA differed significantly. UV or SIM treatment of SLA titanium implants accelerates osseointegration in tibias with or without xenogenic bone graft materials. The combination of both treatments did not show synergy.
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Affiliation(s)
- Ji Hoon Jun
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.H.J.); (K.C.O.); (J.L.)
- Aeromedical Squadron, Republic of Korea Air Force 8th Fighter Wing, Wonju 26304, Korea
| | - Kyung Chul Oh
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.H.J.); (K.C.O.); (J.L.)
| | - Kyu-Hyung Park
- Oral Science Research Center, BK21 Plus Project, Yonsei University College of Dentistry, Seoul 03722, Korea; (K.-H.P.); (N.J.)
| | - Narae Jung
- Oral Science Research Center, BK21 Plus Project, Yonsei University College of Dentistry, Seoul 03722, Korea; (K.-H.P.); (N.J.)
| | - Jiayi Li
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.H.J.); (K.C.O.); (J.L.)
| | - Hong Seok Moon
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.H.J.); (K.C.O.); (J.L.)
- Correspondence: ; Tel.: +82-2-2228-3155; Fax: +82-2-312-3598
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21
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Kraatz B, Belabbas R, Fostowicz-Frelik Ł, Ge DY, Kuznetsov AN, Lang MM, López-Torres S, Mohammadi Z, Racicot RA, Ravosa MJ, Sharp AC, Sherratt E, Silcox MT, Słowiak J, Winkler AJ, Ruf I. Lagomorpha as a Model Morphological System. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.636402] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Due to their global distribution, invasive history, and unique characteristics, European rabbits are recognizable almost anywhere on our planet. Although they are members of a much larger group of living and extinct mammals [Mammalia, Lagomorpha (rabbits, hares, and pikas)], the group is often characterized by several well-known genera (e.g., Oryctolagus, Sylvilagus, Lepus, and Ochotona). This representation does not capture the extraordinary diversity of behavior and form found throughout the order. Model organisms are commonly used as exemplars for biological research, but there are a limited number of model clades or lineages that have been used to study evolutionary morphology in a more explicitly comparative way. We present this review paper to show that lagomorphs are a strong system in which to study macro- and micro-scale patterns of morphological change within a clade that offers underappreciated levels of diversity. To this end, we offer a summary of the status of relevant aspects of lagomorph biology.
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22
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AlOtaibi NM, Dunne M, Ayoub AF, Naudi KB. A novel surgical model for the preclinical assessment of the osseointegration of dental implants: a surgical protocol and pilot study results. J Transl Med 2021; 19:276. [PMID: 34183031 PMCID: PMC8240288 DOI: 10.1186/s12967-021-02944-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/15/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dental implants are considered the gold standard replacement for missing natural teeth. The successful clinical performance of dental implants is due to their ability to osseointegrate with the surrounding bone. Most dental implants are manufactured from Titanium and it alloys. Titanium does however have some shortcomings so alternative materials are frequently being investigated. Effective preclinical studies are essential to transfer the innovations from the benchtop to the patients. Many preclinical studies are carried out in the extra-oral bones of small animal models to assess the osseointegration of the newly developed materials. This does not simulate the oral environment where the dental implants are subjected to several factors that influence osseointegration; therefore, they can have limited clinical value. AIM This study aimed to develop an appropriate in-vivo model for dental implant research that mimic the clinical setting. The study evaluated the applicability of the new model and investigated the impact of the surgical procedure on animal welfare. MATERIALS AND METHODS The model was developed in male New Zealand white rabbits. The implants were inserted in the extraction sockets of the secondary incisors in the maxilla. The model allows a split-mouth comparative analysis. The implants' osseointegration was assessed clinically, radiographically using micro-computed tomography (µ-CT), and histologically. A randomised, controlled split-mouth design was conducted in 6 rabbits. A total of twelve implants were inserted. In each rabbit, two implants; one experimental implant on one side, and one control implant on the other side were applied. Screw-shaped implants were used with a length of 8 mm and a diameter of 2 mm. RESULTS All the rabbits tolerated the surgical procedure well. The osseointegration was confirmed clinically, histologically and radiographically. Quantitative assessment of bone volume and mineral density was measured in the peri-implant bone tissues. The findings suggest that the new preclinical model is excellent, facilitating a comprehensive evaluation of osseointegration of dental implants in translational research pertaining to the human application. CONCLUSION The presented model proved to be safe, reproducible and required basic surgical skills to perform.
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Affiliation(s)
- Noura M AlOtaibi
- Department of Oral and Maxillofacial Surgery, Glasgow University Dental Hospital and School, 378 Sauchiehall Street, Glasgow, G23JZ, UK.,Oral and Maxillofacial Surgery, King Saud University, Riyadh, 11362, Saudi Arabia
| | - Michael Dunne
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Ashraf F Ayoub
- Department of Oral and Maxillofacial Surgery, Glasgow University Dental Hospital and School, 378 Sauchiehall Street, Glasgow, G23JZ, UK
| | - Kurt B Naudi
- Department of Oral and Maxillofacial Surgery, Glasgow University Dental Hospital and School, 378 Sauchiehall Street, Glasgow, G23JZ, UK.
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23
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Computational biomechanical modelling of the rabbit cranium during mastication. Sci Rep 2021; 11:13196. [PMID: 34162932 PMCID: PMC8222361 DOI: 10.1038/s41598-021-92558-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 06/08/2021] [Indexed: 11/08/2022] Open
Abstract
Although a functional relationship between bone structure and mastication has been shown in some regions of the rabbit skull, the biomechanics of the whole cranium during mastication have yet to be fully explored. In terms of cranial biomechanics, the rabbit is a particularly interesting species due to its uniquely fenestrated rostrum, the mechanical function of which is debated. In addition, the rabbit processes food through incisor and molar biting within a single bite cycle, and the potential influence of these bite modes on skull biomechanics remains unknown. This study combined the in silico methods of multi-body dynamics and finite element analysis to compute musculoskeletal forces associated with a range of incisor and molar biting, and to predict the associated strains. The results show that the majority of the cranium, including the fenestrated rostrum, transmits masticatory strains. The peak strains generated over all bites were found to be attributed to both incisor and molar biting. This could be a consequence of a skull shape adapted to promote an even strain distribution for a combination of infrequent incisor bites and cyclic molar bites. However, some regions, such as the supraorbital process, experienced low peak strain for all masticatory loads considered, suggesting such regions are not designed to resist masticatory forces.
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24
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Brito MA, Mecca LEA, Sedoski TDS, Mroczek T, Claudino M, Araujo MRD. Histological Comparison between Biphasic Calcium Phosphate and Deproteinized Bovine Bone on Critical-Size Bone Defects. Braz Dent J 2021; 32:26-33. [PMID: 33913998 DOI: 10.1590/0103-6440202103583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 07/15/2020] [Indexed: 11/21/2022] Open
Abstract
The limited options for bone repair have led to an extensive research of the field and the development of alloplastic and xenogeneic grafts. The purpose of this study was to evaluate bone repair with two bone substitutes: deproteinized bovine bone (DBB) and biphasic calcium phosphate ceramic (BCP) in critical-size defect. A total of 8-mm defects were made in the parietal bones of rabbits (n=12). The animals were divided into three experimental groups: sham (defect filled with a blood clot), DBB (defect filled with DBB), and BCP (defect filled with BCP). After the experimental periods of 15 and 45 days, the animals were euthanized and submitted to histomorphometric analysis. The total defect area, mineralized tissue area, biomaterial area, and soft tissue area were evaluated. A greater amount of immature bone tissue and biomaterial particles were observed in the BCP group compared to DBB and sham at 45 days (p<0.05). There was no difference in the qualitative pattern of bone deposition between DBB and BCP. However, the sham group did not show osteoid islands along with the defect, presenting a greater amount of collagen fibers as well in relation to the DBB and BCP groups. There was a greater number of inflammatory cells in the DBB at 45 days compared to BCP and sham groups. In conclusion, BCP and DBB are options for optimizing the use of bone grafts for maxillofacial rehabilitation. Bone defects treated with BCP showed greater deposition of bone tissue at 45 days.
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Affiliation(s)
| | | | | | - Tayline Mroczek
- Departament of Pharmaceutical Sciences, UEPG - Universidade Estadual de Ponta Grossa, PR, Brazil
| | - Marcela Claudino
- Departament of Dentistry, UEPG - Universidade Estadual de Ponta Grossa, PR, Brazil
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25
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Berbéri A, Fayyad-Kazan M, Ayoub S, Bou Assaf R, Sabbagh J, Ghassibe-Sabbagh M, Badran B. Osteogenic potential of dental and oral derived stem cells in bone tissue engineering among animal models: An update. Tissue Cell 2021; 71:101515. [PMID: 33657504 DOI: 10.1016/j.tice.2021.101515] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 02/21/2021] [Accepted: 02/21/2021] [Indexed: 12/20/2022]
Abstract
Small bone defects can heal spontaneously through the bone modeling process due to their physiological environmental conditions. The bone modeling cycle preserves the reliability of the skeleton through the well-adjusted activities of its fundamental cell. Stem cells are a source of pluripotent cells with a capacity to differentiate into any tissue in the existence of a suitable medium. The concept of bone engineering is based on stem cells that can differentiate into bone cells. Mesenchymal stromal cells have been evaluated in bone tissue engineering due to their capacity to differentiate in osteoblasts. They can be isolated from bone marrow and from several adults oral and dental tissues such as permanent or deciduous teeth dental pulp, periodontal ligament, apical dental papilla, dental follicle precursor cells usually isolated from the follicle surrounding the third molar, gingival tissue, periosteum-derived cells, dental alveolar socket, and maxillary sinus Schneiderian membrane-derived cells. Therefore, a suitable animal model is a crucial step, as preclinical trials, to study the outcomes of mesenchymal cells on the healing of bone defects. We will discuss, through this paper, the use of mesenchymal stem cells obtained from several oral tissues mixed with different types of scaffolds tested in different animal models for bone tissue engineering. We will explore and link the comparisons between human and animal models and emphasized the factors that we need to take into consideration when choosing animals. The pig is considered as the animal of choice when testing large size and multiple defects for bone tissue engineering.
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Affiliation(s)
- Antoine Berbéri
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Lebanese University, Beirut, Lebanon.
| | - Mohammad Fayyad-Kazan
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Beirut, Lebanon; Laboratory of Cancer Biology and Molecular Immunology, Faculty of Sciences-I, Lebanese University, Hadath- Beirut, Lebanon.
| | - Sara Ayoub
- Department of Prosthodontics, Faculty of Dentistry, Lebanese University, Beirut, Lebanon.
| | - Rita Bou Assaf
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Lebanese University, Beirut, Lebanon.
| | - Joseph Sabbagh
- Department of Restorative Dentistry and Endodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon.
| | - Michella Ghassibe-Sabbagh
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Beirut, Lebanon.
| | - Bassam Badran
- Laboratory of Cancer Biology and Molecular Immunology, Faculty of Sciences-I, Lebanese University, Hadath- Beirut, Lebanon.
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26
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Kanai R, Kuroshima S, Kamo M, Sasaki M, Uto Y, Inaba N, Uchida Y, Hayano H, Tamaki S, Inoue M, Sawase T. Effects of surface sub-micrometer topography following oxalic acid treatment on bone quantity and quality around dental implants in rabbit tibiae. Int J Implant Dent 2020; 6:75. [PMID: 33244653 PMCID: PMC7691415 DOI: 10.1186/s40729-020-00275-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 10/27/2020] [Indexed: 11/26/2022] Open
Abstract
Background To explore the effects of topographical modification of titanium substrates at submicron level by oxalic acid treatment on bone quality and quantity around dental implants in rabbit tibiae. Methods A total of 60 blasted CP-grade IV titanium dental implants were used. Twenty-eight control implant surfaces were treated with a mixture of HCl/H2SO4, whereas 28 other test implant surfaces were treated with oxalic acid following HCl/H2SO4 treatment. Two randomly selected sets of control or test implants were placed in randomly selected proximal tibiae of 14 female Japanese white rabbits. Euthanasia was performed 4 and 8 weeks post-implant placement. Bone to implant contact (BIC), bone area fraction (BAF), ratios of mature and immature bone to total bone, and the amount and types of collagen fibers were evaluated quantitatively. Two control and two test implants were used to analyze surface characteristics. Results Treatment by oxalic acid significantly decreased Sa and increased Ra of test implant surfaces. BIC in test implants was increased without alteration of BAF and collagen contents at 4 and 8 weeks after implant placement when compared with control implants. The ratios of immature and mature bone to total bone differed significantly between groups at 4 weeks post-implantation. Treatment by oxalic acid increased type I collagen and decreased type III collagen in bone matrices around test implants when compared with control implants at 8 weeks after implant placement. The effects of topographical changes of implant surfaces induced by oxalic acid on BAF, mature bone, collagen contents, and type I collagen were significantly promoted with decreased immature bone formation and type III collagen in the later 4 weeks post-implantation. Conclusions Treatment of implant surfaces with oxalic acid rapidly increases osseointegration from the early stages after implantation. Moreover, submicron topographical changes of dental implants induced by oxalic acid improve bone quality based on bone maturation and increased production of type I collagen surrounding dental implants in the late stage after implant placement. Supplementary Information The online version contains supplementary material available at 10.1186/s40729-020-00275-x.
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Affiliation(s)
- Riho Kanai
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Shinichiro Kuroshima
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan.
| | - Michimasa Kamo
- Research Section, Medical Division, KYOCERA Corporation, Yasu, 520-2362, Japan
| | - Muneteru Sasaki
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Yusuke Uto
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Nao Inaba
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Yusuke Uchida
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Hiroki Hayano
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Saki Tamaki
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Maaya Inoue
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
| | - Takashi Sawase
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, 852-8588, Japan
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27
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Shen H, Zhi Y, Zhu F, Si J, Shi J, Shen SG. Experimental and clinical evaluation of BMP2-CPC graft versus deproteinized bovine bone graft for guided bone regeneration: A pilot study. Dent Mater J 2020; 40:191-201. [PMID: 33028786 DOI: 10.4012/dmj.2019-437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this study, we proposed BMP2-incorporated calcium phosphate cement (BMP2-CPC), for application in guided bone regeneration (GBR) and compared the experimental bone restoration performance and clinical alveolar bone reconstruction outcome of BMP2-CPC with those of deproteinized bovine bone (DBB). The animal study indicated that, compared to DBB, which induced the slow ingrowth of new bone, BMP2-CPC induced numerous small growth centers for bone regeneration and facilitated a significant amount of bone regeneration in rabbit calvarial bone defects. Fewer residual graft particles remained in the BMP2-CPC-treated defects than in the DBB-treated defects. The clinical study indicated that BMP2-CPC was similar to DBB in remedying alveolar bone insufficiency and maintaining implant stability. In conclusion, the results of this present study indicate that compared to DBB, BMP2-CPC can significantly enhance in vivo bone regeneration and remodeling in rabbit calvarial bone defects and shows preliminary support on its clinical application in GBR surgeries.
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Affiliation(s)
- Hongzhou Shen
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine.,National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology
| | - Yin Zhi
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine
| | - Fangxing Zhu
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine
| | - Jiawen Si
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine
| | - Jun Shi
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine
| | - Steve Gf Shen
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine.,National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology.,Shanghai University of Medicine & Health Sciences
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28
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Song YW, Rafikov K, Paeng KW, Kim MJ, Cha JK, Thoma DS, Jung RE, Jung UW. Dimensional changes of the maxillary sinus augmented with a collagenated synthetic bone block or synthetic bone particulates: A pre-clinical study in rabbits. J Clin Periodontol 2020; 47:1416-1426. [PMID: 32888335 DOI: 10.1111/jcpe.13363] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/08/2020] [Accepted: 08/27/2020] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To compare the efficacy of a collagenated synthetic bone substitute (C-SBS) to a particulated synthetic bone substitute (P-SBS) in volume maintenance and new bone formations in a rabbit sinus model. MATERIALS AND METHODS Either C-SBS or P-SBS was grafted in both sinuses of 16 rabbits. Four (N = 8) or 12 (N = 8) weeks after the surgery, total augmented volume (TAV) and area (TAA), as well as new bone volume (NBV) and area (NBA), were statistically compared by radiographic and histomorphometric analyses (p < .05). RESULTS The differences in TAV, NBV, TAA and NBA between C-SBS and P-SBS groups at 4 weeks were not statistically significant. The TAV (267.13 ± 62.08 vs. 200.18 ± 40.32 mm3 ) and NBV (103.26 ± 10.50 vs. 71.10 ± 7.58 mm3 ) in group C-SBS were significantly higher than in group P-SBS at 12 weeks (p < .05). The TAA (19.36 ± 2.88 vs. 14.48 ± 2.08 mm2 ) and NBA (5.43 ± 1.20 vs. 3.76 ± 0.78 mm2 ) in group C-SBS were significantly higher than in group P-SBS at 12 weeks (p < .05). CONCLUSIONS Collagenated synthetic bone substitute grafted in rabbit sinuses demonstrated more favourable outcomes across all outcome measures compared to P-SBS at 12 weeks.
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Affiliation(s)
- Young Woo Song
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea
| | - Komoliddin Rafikov
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea.,Department of Oral Surgery and Dental Implantology, Tashkent State Dental Institute, Tashkent, Uzbekistan
| | - Kyeong-Won Paeng
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea
| | - Myong Ji Kim
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea
| | - Jae-Kook Cha
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea
| | - Daniel S Thoma
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea.,Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Ronald E Jung
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Ui-Won Jung
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea
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29
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Rahmati M, Frank MJ, Walter SM, Monjo MC, Satué M, Reseland JE, Lyngstadaas SP, Haugen HJ. Osteoimmunomodulatory Effects of Enamel Matrix Derivate and Strontium Coating Layers: A Short- and Long-Term In Vivo Study. ACS APPLIED BIO MATERIALS 2020; 3:5169-5181. [PMID: 32954227 PMCID: PMC7493216 DOI: 10.1021/acsabm.0c00608] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 07/23/2020] [Indexed: 12/22/2022]
Abstract
Over the past few years, surface modification of implant surfaces has gained substantial attention as a promising solution to avoid the failure of biomaterials after implantation. Although researchers suggest several strategies for surface functionalization of titanium-based implants, only a few studies have compared the osteoimmunomodulatory effects of ionic nanostructures and biofunctionalization in the same biological model. Enamel matrix derivate (EMD) and strontium are both known for their positive influences on bone cell responses. In this study, we functionalized the titanium-zirconium implant surface with EMD and strontium using an electrochemical cathodic polarization method. Afterward, we evaluated the osteoimmunomodulatory effects of EMD or strontium coated titanium-zirconium implants in the tibia of eight Gray Bastard Chinchilla rabbits. We performed 2 and 3D micro-CT, wound fluid, histologic, and histomorphometric analyses on bone tissues after 4- and 8-weeks of implantation. Although the results could indicate some differences between groups regarding the bone quality, there was no difference in bone amount or volume. EMD stimulated higher ALP activity and lower cytotoxicity in wound fluid, as well as a lower expression of inflammatory markers after 8 weeks indicating its osteoimmunomodulatory effects after implantation. Overall, the results suggested that ionic nanostructure modification and biofunctionalization might be useful in regulating the immune responses to implants.
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Affiliation(s)
- Maryam Rahmati
- Department
of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109
Blindern, NO-0317 Oslo, Norway
| | - Matthias Johannes Frank
- Department
of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109
Blindern, NO-0317 Oslo, Norway
- Institute
of Medical and Polymer Engineering, Chair of Medical Engineering, Technische Universität München, Boltzmannstrasse 15, 85748 Garching, Germany
| | - Sebastian Martin Walter
- Department
of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109
Blindern, NO-0317 Oslo, Norway
- Institute
of Medical and Polymer Engineering, Chair of Medical Engineering, Technische Universität München, Boltzmannstrasse 15, 85748 Garching, Germany
| | - Marta Cabrer Monjo
- Department
of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of Balearic
Islands, ES-07122 Palma, Spain
- Balearic
Islands Health Institute (IdISBa), ES-07010 Palma, Spain
| | - Maria Satué
- Department
of Fundamental Biology and Health Sciences, Research Institute on Health Sciences (IUNICS), University of Balearic
Islands, ES-07122 Palma, Spain
- Balearic
Islands Health Institute (IdISBa), ES-07010 Palma, Spain
- Department
of Biomedical Sciences, University of Veterinary
Medicine, 1210 Vienna, Austria
| | - Janne Elin Reseland
- Department
of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109
Blindern, NO-0317 Oslo, Norway
| | - Ståle Petter Lyngstadaas
- Department
of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109
Blindern, NO-0317 Oslo, Norway
| | - Håvard Jostein Haugen
- Department
of Biomaterials, Institute for Clinical Dentistry, University of Oslo, PO Box 1109
Blindern, NO-0317 Oslo, Norway
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30
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Jung J, Park JS, Dard M, Al-Nawas B, Kwon YD. Effect of enamel matrix derivative liquid combined with synthetic bone substitute on bone regeneration in a rabbit calvarial model. Clin Oral Investig 2020; 25:547-554. [PMID: 32740811 DOI: 10.1007/s00784-020-03473-4] [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] [Received: 04/21/2020] [Accepted: 07/24/2020] [Indexed: 11/24/2022]
Abstract
OBJECTIVES This study aimed to verify the effectiveness of EMD-liquid in combination with a synthetic bone substitute in a rabbit calvarial model. MATERIAL AND METHODS Four 7-mm outer diameter circular slits were created in the calvaria of 10 New Zealand white rabbits, and polycarbonate cylinders were inserted into the slits. Two experimental groups were established: (1) EMD-liquid + bone substitute (Osteon III®; biphasic calcium phosphate (BCP), β-TCP/HA = 40:60) and (2) saline + bone substitute (Osteon III®; BCP). The cylinders were filled with saturated graft materials and covered with polycarbonate caps. Micro-CT and histomorphometric evaluation were conducted. RESULTS In the histomorphometric analysis, new bone formation was significantly higher in the bone substitute (BS) + EMD-liquid group than in the BS only group at both 5 and 10 weeks (p < 0.01). There were statistically significant differences in the material area between the bone substitute and bone substitute + EMD-liquid groups at only 5 weeks (p < 0.05). The BS + EMD-liquid group demonstrated reduced material area to a greater extent. In micro-CT analysis, the BS + EMD-liquid group (27.04 ± 8.06 at 5 weeks, 28.49 ± 9.22 at 10 weeks) showed a significantly higher percentage of mineralized tissue volume at both 5 and 10 weeks (p < 0.05) than the BS only group. CONCLUSION EMD-liquid enhances new bone formation when combined with BCP bone substitute in an animal model. Moreover, the EMD-liquid + BS has significantly lesser material area than BS alone, indicating accelerated graft degradation. Further studies on types of graft materials are required to verify the effect of EMD-liquid and to optimize its regenerative potential. CLINICAL RELEVANCE This study suggests that EMD-liquid may have beneficial effect on bone regeneration with synthetic bone substitute.
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Affiliation(s)
- Junho Jung
- Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
| | - Jung Soo Park
- Department of Periodontology, Korea University Anam Hospital, Seoul, Republic of Korea
| | - Michel Dard
- Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University, College of Dental Medicine, New York, NY, USA
| | - Bilal Al-Nawas
- Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea.,Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Yong-Dae Kwon
- Department of Oral & Maxillofacial Surgery, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea.
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31
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Schickert SDL, Jansen JA, Bronkhorst EM, van den Beucken JJJP, Leeuwenburgh SCG. Stabilizing dental implants with a fiber-reinforced calcium phosphate cement: An in vitro and in vivo study. Acta Biomater 2020; 110:280-288. [PMID: 32330608 DOI: 10.1016/j.actbio.2020.03.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 01/30/2023]
Abstract
Stabilization of dental implants by means of biomaterials such as bioceramic granules and cements is currently compromised by the poor mechanical properties of these bioceramics. Recently, our group developed a calcium phosphate cement reinforced with poly(vinyl alcohol) fibers with improved flexural strength and toughness. Herein we evaluated the capacity of these fiber-reinforced calcium phosphate cements to stabilize dental implants in vitro and in vivo using a range of mechanical and biological test methods. In vitro, filling of circumferential crestal peri‑implant bone defects with synthetic bone analogues with fiber-reinforced calcium phosphate cement demonstrated superior implant stability as compared to fiber-free calcium phosphate cement over a 12-week period. Similarly, filling of circumferential crestal peri‑implant bone defects with fiber-reinforced calcium phosphate cement effectively stabilized dental implants installed in a rabbit femoral condyle defect as assessed via both Implant Stability Quotient (ISQ) and torque-out measurements. Moreover, histological and histomorphometric evaluation demonstrated the osteocompatibility of fiber-reinforced calcium phosphate cement, as evidenced by absence of soft tissue ingrowth, direct contact between the bone and cement, and gradual degradation of the biomaterial and replacement by newly-formed bone. These data demonstrate that fiber-reinforced calcium phosphate cement stabilize dental implants during osseointegration. STATEMENT OF SIGNIFICANCE: Dental implants can be placed immediately after a tooth is removed. However, in some cases the implant might not have enough bone surrounding it and becomes loose. To solve this, bioceramics have been used to fill the implant-bone gap. However, these materials have poor mechanical properties and are often not capable to stabilize the implant. Recently, our research group developed a new bone cement that is reinforced with fibers and has, therefore, enhanced mechanical properties. In this study, we have proven that by molding this cement into the implant-bone gap, we stabilize the implant and allow for a direct connection between the implant and the surrounding bone. Using this innovative cement is therefore a safe and efficient way of stabilizing dental implants.
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Rahmati M, Lyngstadaas SP, Reseland JE, Andersbakken I, Haugland HS, López-Peña M, Cantalapiedra AG, Guzon Muñoz FM, Haugen HJ. Coating doxycycline on titanium-based implants: Two in vivo studies. Bioact Mater 2020; 5:787-797. [PMID: 32637743 PMCID: PMC7317637 DOI: 10.1016/j.bioactmat.2020.05.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/22/2020] [Accepted: 05/28/2020] [Indexed: 12/19/2022] Open
Abstract
Regardless of the substantial progress in designing titanium-based dental implants and aseptic techniques, infection remains as the most common complication after implantation surgeries. Although, having a weakened immune system or systematic diseases is not seen as contraindicated for dental implants anymore, controlling the immune system is required to avoid surgical site infections after implantation. These patients have to control the surgical site infections by taking a high daily dose of oral antibiotics after dental implantation. The antibiotics oral administration has many side effects such as gastrointestinal symptoms, skin rashes and thrush. Coating antibiotics on the biomaterials surface could be a promising solution to reduce these disadvantages through locally releasing antibiotics in a controlled manner. The aim of this study was to investigate the effects of doxycycline coating layer on titanium-zirconium alloy surfaces in vitro and in vivo. In our previous studies, we demonstrated the chemical presence of doxycycline layer in vitro. In this study, we examined its physical presence using field emission scanning electron microscope and confocal microscope. We also analyzed its controlled released manner using Nano-Drop UV Vis spectrometer. After in vitro characterization of the coating layer, we evaluated its effects on the implant osseointegration in dogs and rabbits. The histological and histomorphometrical results exhibited no significant difference between doxycycline coated and uncoated groups regarding the implants osseointegration and biocompatibility for dental applications. Therefore, coating a doxycycline layer on TiZr implants could be favorable for reducing or removing the antibiotics oral administration after the implantation surgery.
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Affiliation(s)
- Maryam Rahmati
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317, Oslo, Norway
| | - Ståle Petter Lyngstadaas
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317, Oslo, Norway
| | - Janne E. Reseland
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317, Oslo, Norway
| | - Ingrid Andersbakken
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317, Oslo, Norway
| | - Heidi Straume Haugland
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317, Oslo, Norway
| | - Mónica López-Peña
- Universidade de Santiago de Compostela Facultad de Veterinaria, Campus Universitario, s/n, 27002, Lugo, Spain
| | | | - Fernando Maria Guzon Muñoz
- Universidade de Santiago de Compostela Facultad de Veterinaria, Campus Universitario, s/n, 27002, Lugo, Spain
| | - Håvard Jostein Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317, Oslo, Norway
- Corresponding author.
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Bone Marrow Mesenchymal Stromal Cells (BMMSCs) Augment Osteointegration of Dental Implants in Type 1 Diabetic Rabbits: An X-Ray Micro-Computed Tomographic Evaluation. MEDICINA-LITHUANIA 2020; 56:medicina56040148. [PMID: 32218375 PMCID: PMC7230266 DOI: 10.3390/medicina56040148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/19/2020] [Accepted: 03/19/2020] [Indexed: 01/13/2023]
Abstract
Background and objectives: The study aimed to investigate the effect of bone marrow mesenchymal stromal cells (BMMSCs) on implant-bone osseointegration in type I diabetic New Zealand rabbits. Materials and methods: BMMSCs harvested from healthy rabbits were processed and validated for purity and osteocyte differentiability. Mandibular incisors of diabetic and control rabbits were carefully extracted, and the sockets were plugged with collagen sponges. Platelet-rich plasma (PRP) containing osteoinductive BMMSCs, and plain PRP were injected into the collagen sponge of the right and left sockets respectively. Dental implants of 2.6 mm diameter and 10 mm length were inserted into the collagen sponge of both sockets. All the animals were sacrificed six weeks post surgery to evaluate an early stage of osseointegration; the mandibles scanned by X-ray microcomputed tomography (μCT) and subjected to 3D analysis. The μCT parameters of the right implant were paired against that of the left side of each animal and analyzed by paired T-test. Results: The preclinical evaluation of the viability and osteocyte differentiation of the BMMSCs were consistent between both the donor samples. The osseointegration of dental implants with stem cell therapy (BMMSCs + PRP + collagen) in normal and diabetic rabbits was significantly higher than that of implants with adjunctive PRP + collagen only (p < 0.05). Conclusion: Stem Cell therapy with osteoinductive BMMSCs and PRP can offer a novel approach to enhance the osseointegration of dental implants in uncontrolled diabetic patients.
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Farinas AF, Stephanides M, Kassis S, Keller P, Colazo JM, Thayer WP. Sciatic nerve injury model in rabbits: What to expect. Lab Anim 2020; 54:559-567. [PMID: 32070181 DOI: 10.1177/0023677219898481] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Rabbits are commonly used for sciatic nerve injuries larger than 1.5 cm. This report provides insight into risks and benefits associated with using rabbit models in sciatic nerve injury models and proposes interventions that researchers can use to prevent experimental complications. Fifty-six rabbits from a sciatic nerve injury study that involved a 40 mm sciatic nerve injury were analyzed to examine postoperative complication rates. Autophagy of the phalanges and plantar pressure ulcer development were the most common and serious complications faced. These complications led to 23.2% (n = 13) of rabbits not being used for data in the original experiment due to euthanasia outside of intended postoperative time points. This increased the cost needed to complete the experiment by $25,038.44. It is our recommendation that alternative models be used instead of rabbits for sciatic nerve injuries. If rabbits must be used, a treatment protocol for preventing autophagy and pressure ulcers is outlined below.
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Affiliation(s)
- Angel F Farinas
- Department of Plastic Surgery, 12328Vanderbilt University Medical Center, USA
| | - Michael Stephanides
- Department of Plastic Surgery, 12328Vanderbilt University Medical Center, USA
| | - Salam Kassis
- Department of Plastic Surgery, 12328Vanderbilt University Medical Center, USA
| | - Patrick Keller
- Department of Plastic Surgery, 12328Vanderbilt University Medical Center, USA
| | - Juan M Colazo
- Department of Plastic Surgery, 12328Vanderbilt University Medical Center, USA
| | - Wesley P Thayer
- Department of Plastic Surgery, 12328Vanderbilt University Medical Center, USA
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Awadeen MA, Al-Belasy FA, Ameen LE, Helal ME, Grawish ME. Early therapeutic effect of platelet-rich fibrin combined with allogeneic bone marrow-derived stem cells on rats' critical-sized mandibular defects. World J Stem Cells 2020; 12:55-69. [PMID: 32110275 PMCID: PMC7031757 DOI: 10.4252/wjsc.v12.i1.55] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/13/2019] [Accepted: 12/02/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Critically sized bone defects represent a significant challenge to orthopaedic surgeons worldwide. These defects generally result from severe trauma or resection of a whole large tumour. Autologous bone grafts are the current gold standard for the reconstruction of such defects. However, due to increased patient morbidity and the need for a second operative site, other lines of treatment should be introduced. To find alternative unconventional therapies to manage such defects, bone tissue engineering using a combination of suitable bioactive factors, cells, and biocompatible scaffolds offers a promising new approach for bone regeneration.
AIM To evaluate the healing capacity of platelet-rich fibrin (PRF) membranes seeded with allogeneic mesenchymal bone marrow-derived stem cells (BMSCs) on critically sized mandibular defects in a rat model.
METHODS Sixty-three Sprague Dawley rats were subjected to bilateral bone defects of critical size in the mandibles created by a 5-mm diameter trephine bur. Rats were allocated to three equal groups of 21 rats each. Group I bone defects were irrigated with normal saline and designed as negative controls. Defects of group II were grafted with PRF membranes and served as positive controls, while defects of group III were grafted with PRF membranes seeded with allogeneic BMSCs. Seven rats from each group were killed at 1, 2 and 4 wk. The mandibles were dissected and prepared for routine haematoxylin and eosin (HE) staining, Masson's trichrome staining and CD68 immunohistochemical staining.
RESULTS Four weeks postoperatively, the percentage area of newly formed bone was significantly higher in group III (0.88 ± 0.02) than in groups I (0.02 ± 0.00) and II (0.60 ± 0.02). The amount of granulation tissue formation was lower in group III (0.12 ± 0.02) than in groups I (0.20 ± 0.02) and II (0.40 ± 0.02). The number of inflammatory cells was lower in group III (0.29 ± 0.03) than in groups I (4.82 ± 0.08) and II (3.09 ± 0.07).
CONCLUSION Bone regenerative quality of critically sized mandibular bone defects in rats was better promoted by PRF membranes seeded with BMSCs than with PRF membranes alone.
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Affiliation(s)
- Muhammad A Awadeen
- Department of Oral Biology, Faculty of Oral and Dental Medicine, Delta University for Science and Technology, Mansoura 11152, Egypt
| | - Fouad A Al-Belasy
- Department of Oral Surgery and Anesthesia, Faculty of Oral and Dental Medicine, Delta University for Science and Technology, Mansoura 11152, Egypt
| | - Laila E Ameen
- Department of Oral Biology, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt
| | - Mohamad E Helal
- Department of Oral Biology, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt
| | - Mohammed E Grawish
- Department of Oral Biology, Faculty of Oral and Dental Medicine, Delta University for Science and Technology, Mansoura 11152, Egypt
- Department of Oral Biology, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt
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Porous Titanium Granules in comparison with Autogenous Bone Graft in Femoral Osseous Defects: A Histomorphometric Study of Bone Regeneration and Osseointegration in Rabbits. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8105351. [PMID: 31915704 PMCID: PMC6935454 DOI: 10.1155/2019/8105351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/09/2019] [Indexed: 11/18/2022]
Abstract
Background The high resorption rate of autogenous bone is a well-documented phenomenon that can lead to insufficient bone quality and quantity in an augmented area. Nonresorbable bone substitutes might perform better than autogenous bone in certain applications if they are able to provide adequate bone formation and graft osseointegration. Purpose The aim of this study was to compare the osseous regeneration and graft integration in standardized defects in the rabbit femur treated either with porous titanium granules or autogenous osseous graft. Materials and Methods Standardized femoral osseous defects were surgically induced in 45 New Zealand rabbits. Fifteen were treated with porous titanium granules (TIGRAN™-PTG) and membrane (PTGM), 15 with autogenous graft and membrane (AGM), and 15 with membrane alone (CM, control). At six weeks, the defects were assessed histologically and histomorphometrically. Results PTGM as compared to AGM presented similar percentages of newly formed bone tissue, but a significantly higher fraction of the region of interest was filled with the bone substitute material. Accordingly, the composite of new bone plus bone substitute material showed significantly higher volumes for PTGM. Yet, the smaller amount of remaining autogenous bone was far better osseointegrated than the titanium granules, which in large regions showed no connection to newly formed bone. Both PTGM and AGM as compared to CM presented higher values of newly formed bone. Conclusions This study demonstrated that PTG was similarly effective as autogenous osseous graft in achieving osseous regeneration while PTG performed markedly better in graft volume stability. The resulting higher total percentage of new bone combined with the bone substitute material in PTG could provide a superior foundation for implant placement.
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Titanium fixture implants treated by laser in dentistry: Review article. JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY, MEDICINE, AND PATHOLOGY 2019. [DOI: 10.1016/j.ajoms.2019.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bollman M, Malbrue R, Li C, Yao H, Guo S, Yao S. Improvement of osseointegration by recruiting stem cells to titanium implants fabricated with 3D printing. Ann N Y Acad Sci 2019; 1463:37-44. [PMID: 31603258 DOI: 10.1111/nyas.14251] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/25/2019] [Accepted: 09/16/2019] [Indexed: 01/14/2023]
Abstract
Slow and incomplete osseointegration and loss of osseointegration are major problems in dental and bone implants. We designed implants with interconnected 3D-tubulous structures and hypothesized that such interconnecting 3D (I3D) structures would serve as a repository for chemoattractants to recruit stem cells to promote osseointegration. A concept Laser Mlab-cusing-R laser-powder-bed-fusion (LPBF) 3D printing system was used to produce titanium implants with designed features. The implants were loaded (coated) with stromal cell-derived factor-1 alpha (SDF-1α), and subjected to stem cell recruitment. Implants were then surgically transplanted into the rabbit skull bone. After 12 weeks, osseointegration was analyzed by reverse-torque test and the implants were examined for calcium deposition by Alizarin Red staining. The I3D implants attracted significantly more stem cells than solid implants when coated (loaded) with SDF-1α. Greater torque force was needed to extract the I3D implants with 200 and 300 µm I3D structures than to extract solid implants from the skull. Generally, more calcium deposition was observed on the I3D implants than on the solid counterparts. LPBF 3D printing can be used to fabricate implants with complex structures. I3D-tubulous structures of implants can retain chemoattractant for recruitment of stem cells to enhance osseointegration.
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Affiliation(s)
- Mary Bollman
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
| | - Raphael Malbrue
- Laboratory Animal Medicine, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
| | - Chunhong Li
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
| | - Hong Yao
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, Louisiana
| | - Shengmin Guo
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, Louisiana
| | - Shaomian Yao
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
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Ewald A, Kreczy D, Brückner T, Gbureck U, Bengel M, Hoess A, Nies B, Bator J, Klammert U, Fuchs A. Development and Bone Regeneration Capacity of Premixed Magnesium Phosphate Cement Pastes. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2119. [PMID: 31266228 PMCID: PMC6651064 DOI: 10.3390/ma12132119] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 02/06/2023]
Abstract
Magnesium phosphate cements (MPC) have been demonstrated to have a superior bone regeneration capacity due to their good solubility under in vivo conditions. While in the past only aqueous MPC pastes have been applied, the current study describes the fabrication and in vitro/in vivo testing of an oil-based calcium doped magnesium phosphate (CaMgP) cement paste. Premixed oil-based pastes with CaMgP chemistry combine the advantages of conventional MPC such as high mechanical strength and good resorbability with a prolonged shelf-life and an easier clinical handling. The pastes set in an aqueous environment and predominantly form struvite and achieve a compressive strength of ~8-10 MPa after setting. The implantation into a drill-hole defect at the distal femoral condyle of New Zealand white rabbits over a course of 6 and 12 weeks demonstrated good biocompatibility of the materials without the formation of soft connective tissue or any signs of inflammation. In contrast to a hydroxyapatite forming reference paste, the premixed CaMgP pastes showed subsequent degradation and bony regeneration. The CaMgP cement pastes presented herein are promising bone replacement materials with excellent material properties for an improved and facilitated clinical application.
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Affiliation(s)
- Andrea Ewald
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany.
| | - Dorothea Kreczy
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Theresa Brückner
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Melanie Bengel
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Andreas Hoess
- INNOTERE GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Berthold Nies
- INNOTERE GmbH, Meissner Strasse 191, 01445 Radebeul, Germany
| | - Julia Bator
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Uwe Klammert
- Department of Oral & Maxillofacial Plastic Surgery, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Andreas Fuchs
- Department of Oral & Maxillofacial Plastic Surgery, University Hospital Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
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Fraser D, Mendonca G, Sartori E, Funkenbusch P, Ercoli C, Meirelles L. Bone response to porous tantalum implants in a gap-healing model. Clin Oral Implants Res 2019; 30:156-168. [PMID: 30636059 DOI: 10.1111/clr.13402] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 10/31/2018] [Accepted: 12/22/2018] [Indexed: 01/30/2023]
Abstract
OBJECTIVES The objective of this study was to determine the relative osteogenic behavior of titanium implants with or without a porous tantalum modification when placed with a gap between the implant and existing bone. MATERIALS AND METHODS A gap-healing model in the rabbit tibia was used for placement of titanium implants. Forty-eight rabbits received 96 implants, with 48 of the implants containing a porous tantalum middle section and the remaining 48 implants were composed of solid titanium. After 4, 8, and 12 weeks of healing, biomechanical stability was measured with removal torque testing, implant-adherent cells were isolated for analysis of osteogenic gene expression, and histomorphometric analysis was performed on sections of the implants and surrounding bone. RESULTS Increased osteogenic activity at 4 weeks was demonstrated by upregulation of key osteogenic genes at implants containing porous tantalum which was accompanied by greater bone-implant contact at 4, 8, and 12 weeks and significantly greater removal torque at 8 and 12 weeks. CONCLUSIONS Implants containing porous tantalum demonstrated increased peri-implant bone formation within this gap-healing model as shown by significant differences in biomechanical and histomorphometric outcomes. Such implants may represent an alternative to influence bone healing in surgical sites with an existing gap.
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Affiliation(s)
- David Fraser
- Eastman Institute for Oral Health, University of Rochester, Rochester, New York
| | - Gustavo Mendonca
- Department of Biologic and Material Science, University of Michigan, Ann Arbor, Michigan
| | - Elisa Sartori
- Department of Biologic and Material Science, University of Michigan, Ann Arbor, Michigan
| | - Paul Funkenbusch
- Department of Mechanical Engineering, University of Rochester, Rochester, New York
| | - Carlo Ercoli
- Eastman Institute for Oral Health, University of Rochester, Rochester, New York
| | - Luiz Meirelles
- Eastman Institute for Oral Health, University of Rochester, Rochester, New York
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Promotion of Dental Pulp Wound Healing in New Zealand White Rabbits’ Teeth by Thai Propolis Product. J Vet Dent 2018; 36:17-24. [DOI: 10.1177/0898756418818891] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study examined and compared wound healing between Thai propolis product and calcium hydroxide paste as pulp-capping agents after partial pulpotomy in New Zealand white rabbits. Forty incisor teeth from 10 rabbits were treated. Thirty-six teeth received class V cavity preparations with partial pulpotomy and application of either propolis or calcium hydroxide paste. Similar cavity preparations were performed in 2 teeth without any capping material as a positive control, whereas 2 teeth without the cavity preparation served as a negative control. Histological evaluation showed that both groups had dentin bridge formation. Dentinal tubules in the dentin bridge were more orderly arranged in the Thai propolis group than in the calcium hydroxide group. Wound healing and the median number of hyperemic blood vessels were not statistically significant different between the 2 groups. Thai propolis product may be used as a pulp-capping agent.
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Ding L, Zhang P, Wang X, Kasugai S. A doxycycline-treated hydroxyapatite implant surface attenuates the progression of peri-implantitis: A radiographic and histological study in mice. Clin Implant Dent Relat Res 2018; 21:154-159. [PMID: 30444054 DOI: 10.1111/cid.12695] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/08/2018] [Accepted: 10/14/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND Oral rehabilitation with dental implants has become increasingly common; however, the increase of peri-implantitis is a great concern. Doxycycline (DOX) is a widely used antibiotic that inhibits bacteria growth, inflammation, and bone resorption. OBJECTIVES To evaluate the progression of peri-implantitis of hydroxyapatite (HA)-coated implants with (5 mg/mL, DOX group) or without (HA group) DOX treatment on the surface. MATERIALS AND METHODS The maxillary first molars of 20 male mice were extracted. Eight weeks later, small titanium screw implants coated with thin HA and treated with or without DOX were placed at the extracted sites. Four weeks after implant placement, half of the animals in both groups were sacrificed, and ligatures were placed around the implant necks in the other half. These mice were sacrificed 4 weeks later. The bone around the implants was examined radiologically and histologically. RESULTS Four weeks after the ligature placement, the radiographic measurements revealed that peri-implant bone levels of palatal and mesial sites, and histological measurements showed that bone levels of mesial and distal sites in the DOX group were significantly higher than those in the HA group. CONCLUSIONS The present results indicating that the DOX-treated HA implant surface attenuates the progression of peri-implantitis.
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Affiliation(s)
- Lin Ding
- Foshan Stomatology Hospital, School of Stomatology and Medicine, Foshan University, Foshan, People's Republic of China
| | - Peng Zhang
- Department of Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Xin Wang
- VIP Clinic, Beijing Stomatological Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Shohei Kasugai
- Department of Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Trbakovic A, Hedenqvist P, Mellgren T, Ley C, Hilborn J, Ossipov D, Ekman S, Johansson CB, Jensen-Waern M, Thor A. A new synthetic granular calcium phosphate compound induces new bone in a sinus lift rabbit model. J Dent 2018; 70:31-39. [PMID: 29258851 DOI: 10.1016/j.jdent.2017.12.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 11/29/2017] [Accepted: 12/15/2017] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVES The aim of this study was to investigate if a synthetic granular calcium phosphate compound (CPC) and a composite bisphosphonate-linked hyaluronic acid-calcium phosphate hydrogel (HABP·CaP) induced similar or more amount of bone as bovine mineral in a modified sinus lift rabbit model. MATERIAL AND METHODS Eighteen adult male New Zeeland White rabbits, received randomly one of the two test materials on a random side of the face, and bovine mineral as control on the contralateral side. In a sinus lift, the sinus mucosa was elevated and a titanium mini-implant was placed in the alveolar bone. Augmentation material (CPC, HABP·CaP or bovine bone) was applied in the space around the implant. The rabbits were euthanized three months after surgery and qualitative and histomorphometric evaluation were conducted. Histomorphometric evaluation included three different regions of interest (ROIs) and the bone to implant contact on each installed implant. RESULTS Qualitative assessment (p = <.05), histomorphometric evaluations (p = < .01), and implant incorporation (p = <.05) showed that CPC and bovine mineral induced similar amount of bone and more than the HABP·CaP hydrogel. CONCLUSION CPC induced similar amount of bone as bovine mineral and both materials induced more bone than HABP·CaP hydrogel. CLINICAL SIGNIFICANCE The CPC is suggested as a synthetic alternative for augmentations in the maxillofacial area.
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Affiliation(s)
- Amela Trbakovic
- Department of Surgical Sciences, Plastic & Oral and Maxillofacial Surgery, Uppsala University, 751 85 Uppsala, Sweden.
| | - Patricia Hedenqvist
- Swedish University of Agricultural Sciences, Department of Clinical Sciences, PO Box 7054, 750 07 Uppsala, Sweden.
| | - Torbjörn Mellgren
- Polymer Chemistry, Department of Chemistry, Ångströms Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden.
| | - Cecilia Ley
- Swedish University of Agricultural Sciences, Department of Biomedical Sciences and Veterinary Public Health, Division of Pathology, PO Box 7028, 750 07 Uppsala, Sweden.
| | - Jöns Hilborn
- Polymer Chemistry, Department of Chemistry, Ångströms Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden.
| | - Dmitri Ossipov
- Polymer Chemistry, Department of Chemistry, Ångströms Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden
| | - Stina Ekman
- Swedish University of Agricultural Sciences, Department of Biomedical Sciences and Veterinary Public Health, Division of Pathology, PO Box 7028, 750 07 Uppsala, Sweden.
| | - Carina B Johansson
- University of Gothenburg, The Sahlgrenska Academy, Institute of Odontology, Department of Prosthodontics, Dental Materials Science, P.O. Box 450, 405 30 Gothenburg, Sweden.
| | - Marianne Jensen-Waern
- Swedish University of Agricultural Sciences, Department of Clinical Sciences, PO Box 7054, 750 07 Uppsala, Sweden.
| | - Andreas Thor
- Department of Surgical Sciences, Plastic & Oral and Maxillofacial Surgery, Uppsala University, 751 85 Uppsala, Sweden.
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Shanbhag S, Pandis N, Mustafa K, Nyengaard JR, Stavropoulos A. Alveolar bone tissue engineering in critical-size defects of experimental animal models: a systematic review and meta-analysis. J Tissue Eng Regen Med 2017; 11:2935-2949. [PMID: 27524517 DOI: 10.1002/term.2198] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/07/2016] [Accepted: 03/14/2016] [Indexed: 01/17/2023]
Abstract
Regeneration of large, 'critical-size' bone defects remains a clinical challenge. Bone tissue engineering (BTE) is emerging as a promising alternative to autogenous, allogeneic and biomaterial-based bone grafting. The objective of this systematic review was to answer the focused question: in animal models, do cell-based BTE strategies enhance regeneration in alveolar bone critical-size defects (CSDs), compared with grafting with only biomaterial scaffolds or autogenous bone? Following PRISMA guidelines, electronic databases were searched for controlled animal studies reporting maxillary or mandibular CSD and implantation of mesenchymal stem cells (MSCs) or osteoblasts (OBs) seeded on biomaterial scaffolds. A random effects meta-analysis was performed for the outcome histomorphometric new bone formation (%NBF). Thirty-six studies were included that reported on large- (monkeys, dogs, sheep, minipigs) and small-animal (rabbits, rats) models. On average, studies presented with an unclear-to-high risk of bias and short observation times. In most studies, MSCs or OBs were used in combination with alloplastic mineral-phase scaffolds. In five studies, cells were modified by ex vivo gene transfer of bone morphogenetic proteins (BMPs). The meta-analysis indicated statistically significant benefits in favour of: (1) cell-loaded vs. cell-free scaffolds [weighted mean difference (WMD) 15.59-49.15% and 8.60-13.85% NBF in large- and small-animal models, respectively]; and (2) BMP-gene-modified vs. unmodified cells (WMD 10.06-20.83% NBF in small-animal models). Results of cell-loaded scaffolds vs. autogenous bone were inconclusive. Overall, heterogeneity in the meta-analysis was high (I2 > 90%). In summary, alveolar bone regeneration is enhanced by addition of osteogenic cells to biomaterial scaffolds. The direction and estimates of treatment effect are useful to predict therapeutic efficacy and guide future clinical trials of BTE. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Siddharth Shanbhag
- Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen, Bergen, Norway
- Department of Periodontology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Nikolaos Pandis
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Bern, Switzerland
| | - Kamal Mustafa
- Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen, Bergen, Norway
| | - Jens R Nyengaard
- Stereology and Electron Microscopy Laboratory, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, Malmö University, Malmö, Sweden
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Shanbhag S, Pandis N, Mustafa K, Nyengaard JR, Stavropoulos A. Cell Cotransplantation Strategies for Vascularized Craniofacial Bone Tissue Engineering: A Systematic Review and Meta-Analysis of Preclinical In Vivo Studies. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:101-117. [PMID: 27733094 DOI: 10.1089/ten.teb.2016.0283] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The regenerative potential of tissue-engineered bone constructs may be enhanced by in vitro coculture and in vivo cotransplantation of vasculogenic and osteogenic (progenitor) cells. The objective of this study was to systematically review the literature to answer the focused question: In animal models, does cotransplantation of osteogenic and vasculogenic cells enhance bone regeneration in craniofacial defects, compared with solely osteogenic cell-seeded constructs? Following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines, electronic databases were searched for controlled animal studies reporting cotransplantation of endothelial cells (ECs) with mesenchymal stem cells (MSCs) or osteoblasts in craniofacial critical size defect (CSD) models. Twenty-two studies were included comparing outcomes of MSC/scaffold versus MSC+EC/scaffold (co)transplantation in calvarial (n = 15) or alveolar (n = 7) CSDs of small (rodents, rabbits) and large animal (minipigs, dogs) models. On average, studies presented with an unclear to high risk of bias. MSCs were derived from autologous, allogeneic, xenogeneic, or human (bone marrow, adipose tissue, periosteum) sources; in six studies, ECs were derived from MSCs by endothelial differentiation. In most studies, MSCs and ECs were cocultured in vitro (2-17 days) before implantation. Coculture enhanced MSC osteogenic differentiation and an optimal MSC:EC seeding ratio of 1:1 was identified. Alloplastic copolymer or composite scaffolds were most often used for in vivo implantation. Random effects meta-analyses were performed for histomorphometric and radiographic new bone formation (%NBF) and vessel formation in rodents' calvarial CSDs. A statistically significant benefit in favor of cotransplantation versus MSC-only transplantation for radiographic %NBF was observed in rat calvarial CSDs (weighted mean difference 7.80% [95% confidence interval: 1.39-14.21]); results for histomorphometric %NBF and vessel formation were inconclusive. Overall, heterogeneity in the meta-analyses was high (I2 > 80%). In summary, craniofacial bone regeneration is enhanced by cotransplantation of vasculogenic and osteogenic cells. Although the direction of treatment outcome is in favor of cotransplantation strategies, the magnitude of treatment effect does not seem to be of relevance, unless proven otherwise in clinical studies.
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Affiliation(s)
- Siddharth Shanbhag
- 1 Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen , Bergen, Norway .,2 Department of Periodontology, Faculty of Odontology, Malmö University , Malmö, Sweden
| | - Nikolaos Pandis
- 3 Department of Orthodontics and Dentofacial Orthopedics, School of Dental Medicine, University of Bern , Bern, Switzerland
| | - Kamal Mustafa
- 1 Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen , Bergen, Norway
| | - Jens R Nyengaard
- 4 Stereology and Electron Microscopy Laboratory, Department of Clinical Medicine, Aarhus University , Aarhus, Denmark
| | - Andreas Stavropoulos
- 2 Department of Periodontology, Faculty of Odontology, Malmö University , Malmö, Sweden
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Shah SR, Young S, Goldman JL, Jansen JA, Wong ME, Mikos AG. A composite critical-size rabbit mandibular defect for evaluation of craniofacial tissue regeneration. Nat Protoc 2016; 11:1989-2009. [PMID: 27658014 DOI: 10.1038/nprot.2016.122] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Translational biomaterials targeted toward the regeneration of large bone defects in the mandible require a preclinical model that accurately recapitulates the regenerative challenges present in humans. Computational modeling and in vitro assays do not fully replicate the in vivo environment. Consequently, in vivo models can have specific applications such as those of the mandibular angle defect, which is used to investigate bone regeneration in a nonload-bearing area, and the inferior border mandibular defect, which is a model for composite bone and nerve regeneration, with both models avoiding involvement of soft tissue or teeth. In this protocol, we describe a reproducible load-bearing critical-size composite tissue defect comprising loss of soft tissue, bone and tooth in the mandible of a rabbit. We have previously used this procedure to investigate bone regeneration, vascularization and infection prevention in response to new biomaterial formulations for craniofacial tissue engineering applications. This surgical approach can be adapted to investigate models such as that of regeneration in the context of osteoporosis or irradiation. The procedure can be performed by researchers with basic surgical skills such as dissection and suturing. The procedure takes 1.5-2 h, with ∼2 h of immediate postoperative care, and animals should be monitored daily for the remainder of the study. For bone tissue engineering applications, tissue collection typically occurs 12 weeks after surgery. In this protocol, we will present the necessary steps to ensure reproducibility; tips to minimize complications during and after surgery; and analytical techniques for assessing soft tissue, bone and vessel regeneration by gross evaluation, microcomputed tomography (microCT) and histology.
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Affiliation(s)
- Sarita R Shah
- Department of Bioengineering, Rice University, Houston, Texas, USA
| | - Simon Young
- Department of Oral and Maxillofacial Surgery, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Julia L Goldman
- Center for Laboratory Animal Medicine and Care, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - John A Jansen
- Department of Biomaterials, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Mark E Wong
- Department of Oral and Maxillofacial Surgery, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Antonios G Mikos
- Department of Bioengineering, Rice University, Houston, Texas, USA
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Effect of environmental enrichment and composition of the social group on the behavior, welfare, and relative brain weight of growing rabbits. Appl Anim Behav Sci 2016. [DOI: 10.1016/j.applanim.2016.05.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Carprofen neither reduces postoperative facial expression scores in rabbits treated with buprenorphine nor alters long term bone formation after maxillary sinus grafting. Res Vet Sci 2016; 107:123-131. [PMID: 27473985 DOI: 10.1016/j.rvsc.2016.05.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 05/10/2016] [Accepted: 05/22/2016] [Indexed: 11/24/2022]
Abstract
In connection with bilateral maxillary sinus augmentation, the acute effects of the nonsteroidal anti-inflammatory drug carprofen on facial expressions and long-term effects on bone formation were evaluated in 18 male New Zealand White rabbits. A 10×10mm bone window was drilled in the maxilla, the sinus membrane elevated and a titanium mini-implant inserted. One of two test materials was randomly inserted unilaterally and bovine bone chips (control) on the contralateral side in the created space. Rabbits were randomly allocated to receive buprenorphine plus carprofen (n=9) or buprenorphine plus saline (n=9) postoperatively. Buprenorphine was administered subcutaneously every 6h for 3days in a tapered dose (0.05-0.01mg/kg) and carprofen (5mg/kg) or saline administered subcutaneously 1h before, and daily for 4days postoperatively. To assess pain, clinical examination, body weight recording and scoring of facial expressions from photos taken before, and 6-13h after surgery were performed. Twelve weeks after surgery the rabbits were euthanized and sections of maxillary bones and sinuses were analysed with histomorphometry and by qualitative histology. Carprofen had no effect on mean facial expression scores, which increased from 0.0 to 3.6 (carprofen) and 4.3 (saline), of a maximum of 8.0. Neither did carprofen have an effect on bone formation or implant incorporation, whereas the test materials had. In conclusion, treatment with 5mg/kg carprofen once daily for 5days did not reduce facial expression scores after maxillary sinus augmentation in buprenorphine treated rabbits and did not affect long term bone formation.
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Al-Mahalawy H, Marei HF, Abuohashish H, Alhawaj H, Alrefaee M, Al-Jandan B. Effects of cisplatin chemotherapy on the osseointegration of titanium implants. J Craniomaxillofac Surg 2016; 44:337-46. [PMID: 26895777 DOI: 10.1016/j.jcms.2016.01.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Revised: 12/29/2015] [Accepted: 01/12/2016] [Indexed: 11/28/2022] Open
Abstract
PURPOSE The effect of chemotherapy on the osseointegration of dental implants has received less interest compared with radiotherapy. Thus, the aim of the current study was to investigate the effect of cisplatin chemotherapy on the osseointegration of dental implants in a rabbit model. MATERIALS AND METHODS Sixteen New Zealand White rabbits were randomly assigned to two groups of treatment of either cisplatin at 2.5 mg/kg/week for 4 weeks (n = 8) or placebo (n = 8), in which the first dose was administered 2 days prior to the surgical procedure. Each rabbit received one titanium dental implant inserted in the right distal femoral condyle. Four rabbits from each group were sacrificed 4 and 8 weeks after implant insertion. Osseointegration of the dental implants was analysed using micro-computed tomography and histomorphometric evaluation. RESULTS Analysis of micro-computed tomography data and histomorphometric data showed that the osseointegration parameters, including the ratio of bone volume to total volume (BV/TV) and bone-implant contact (BIC%) for the cisplatin group, were significantly lower compared to the control group at 4 and 8 weeks. (P ≤ 0.05). CONCLUSION Cisplatin chemotherapy had a negative effect on the osseointegration of dental implants when inserted throughout the chemotherapeutic regimens in a rabbit model.
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Affiliation(s)
- Haytham Al-Mahalawy
- Biomedical Dental Sciences Department, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam, 31441, Saudi Arabia.
| | - Hesham F Marei
- Biomedical Dental Sciences Department, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam, 31441, Saudi Arabia.
| | - Hatem Abuohashish
- Biomedical Dental Sciences Department, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam, 31441, Saudi Arabia.
| | - Hussain Alhawaj
- Center of Research and Medical Consultation, University of Dammam, Dammam, 31441, Saudi Arabia.
| | - Munir Alrefaee
- Department of Internal Medicine, Oncology & Hematology, College of Medicine, University of Dammam, Dammam, Saudi Arabia.
| | - Badr Al-Jandan
- Biomedical Dental Sciences Department, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam, 31441, Saudi Arabia.
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Nguyen Vo TN, Hao J, Chou J, Oshima M, Aoki K, Kuroda S, Kaboosaya B, Kasugai S. Ligature induced peri-implantitis: tissue destruction and inflammatory progression in a murine model. Clin Oral Implants Res 2016; 28:129-136. [DOI: 10.1111/clr.12770] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2015] [Indexed: 01/27/2023]
Affiliation(s)
- Trang N. Nguyen Vo
- Department of Oral Implantology and Regenerative Dental Medicine; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - Jia Hao
- Department of Oral Implantology and Regenerative Dental Medicine; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - Josh Chou
- School of Life Sciences; Faculty of Science; University of Technology Sydney; Sydney NSW Australia
| | - Masamitsu Oshima
- Department of Oral Rehabilitation and Regenerative Medicine; Graduate School of Medicine; Dentistry and Pharmaceutical Sciences; Okayama University; Okayama Japan
| | - Kazuhiro Aoki
- Department of Bio-Matrix (Pharmacology); Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - Shinji Kuroda
- Department of Oral Implantology and Regenerative Dental Medicine; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - Boosana Kaboosaya
- Department of Oral Implantology and Regenerative Dental Medicine; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - Shohei Kasugai
- Department of Oral Implantology and Regenerative Dental Medicine; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
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