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Bergamo ETP, de Oliveira PGFP, Campos TMB, Bonfante EA, Tovar N, Boczar D, Nayak VV, Coelho PG, Witek L. Osseointegration of implant surfaces in metabolic syndrome and type-2 diabetes mellitus. J Biomed Mater Res B Appl Biomater 2024; 112:e35382. [PMID: 38355936 PMCID: PMC10883641 DOI: 10.1002/jbm.b.35382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 11/20/2023] [Accepted: 01/27/2024] [Indexed: 02/16/2024]
Abstract
This in vivo study evaluated the bone healing response around endosteal implants with varying surface topography/chemistry in a preclinical, large transitional model induced with metabolic syndrome (MS) and type-2 diabetes mellitus (T2DM). Fifteen Göttingen minipigs were randomly distributed into two groups: (i) control (normal diet, n = 5) and (ii) O/MS (cafeteria diet for obesity induction, n = 10). Following obesity induction, five minipigs from the obese/metabolic syndrome (O/MS) group were further allocated, randomly, into the third experimental group: (iii) T2DM (cafeteria diet + streptozotocin). Implants with different surface topography/chemistry: (i) dual acid-etched (DAE) and (ii) nano-hydroxyapatite coating over the DAE surface (NANO), were placed into the right ilium of the subjects and allowed to heal for 4 weeks. Histomorphometric evaluation of bone-to-implant contact (%BIC) and bone area fraction occupancy (%BAFO) within implant threads were performed using histomicrographs. Implants with NANO surface presented significantly higher %BIC (~26%) and %BAFO (~35%) relative to implants with DAE surface (%BIC = ~14% and %BAFO = ~28%, p < .025). Data as a function of systemic condition presented significantly higher %BIC (~28%) and %BAFO (~42%) in the control group compared with the metabolically compromised groups (O/MS: %BIC = 14.35% and %BAFO = 26.24%, p < .021; T2DM: %BIC = 17.91% and %BAFO = 26.12%, p < .021) with no significant difference between O/MS and T2DM (p > .05). Statistical evaluation considering both factors demonstrated significantly higher %BIC and %BAFO for the NANO surface relative to DAE implant, independent of systemic condition (p < .05). The gain increase of %BIC and %BAFO for the NANO compared with DAE was more pronounced in O/MS and T2DM subjects. Osseointegration parameters were significantly reduced in metabolically compromised subjects compared with healthy subjects. Nanostructured hydroxyapatite-coated surfaces improved osseointegration relative to DAE, regardless of systemic condition.
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Affiliation(s)
- Edmara T P Bergamo
- Biomaterials Division, NYU Dentistry, New York, New York, USA
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Paula G F P de Oliveira
- Biomaterials Division, NYU Dentistry, New York, New York, USA
- CESUPA, Department of Periodontology, University Center of State of Para, Belem, Para, Brazil
| | - Tiago M B Campos
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
- Department of Physics, Technological Institute of Aeronautics, São José dos Campos, São Paulo, Brazil
| | - Estevam A Bonfante
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Nick Tovar
- Biomaterials Division, NYU Dentistry, New York, New York, USA
- Department of Oral and Maxillofacial Surgery, NYU Langone Medical Center and Bellevue, Hospital Center, New York, New York, USA
| | - Daniel Boczar
- Department of Surgery, University of Washington, Seattle, Washington, USA
| | - Vasudev Vivekanand Nayak
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Paulo G Coelho
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida, USA
- DeWitt Daughtry Family Department of Surgery, Division of Plastic Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Lukasz Witek
- Biomaterials Division, NYU Dentistry, New York, New York, USA
- Department of Biomedical Engineering, Tandon School of Engineering, New York University, Brooklyn, New York, USA
- Hansjörg Wyss Department of Plastic Surgery, NYU Grossman School of Medicine, New York, New York, USA
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Matos FG, Stremel ACA, Lipinski LC, Cirelli JA, Dos Santos FA. Dental implants in large animal models with experimental systemic diseases: A systematic review. Lab Anim 2023; 57:489-503. [PMID: 37021606 DOI: 10.1177/00236772221124972] [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] [Indexed: 04/07/2023]
Abstract
This systematic review aims to identify and discuss the most used methodologies in pre-clinical studies for the evaluation of the implementation of dental implants in systemically compromised pigs and sheep. This study provides support and guidance for future research, as well as for the prevention of unnecessary animal wastage and sacrifice. Preferred Reporting for Systematic Reviews and Meta-Analyses (PRISMA) was used as a guideline; electronic searches were performed in PubMed, Scopus, Scielo, Web of Science, Embase, Science Direct, Brazilian Bibliography of Dentistry, Latin American and Caribbean Literature in Health Sciences, Directory of Open Access Journals, Database of Abstracts of Reviews of Effects, and gray literature until January 2022 (PROSPERO/CRD42021270119). Sixty-eight articles were chosen from the 2439 results. Most studies were conducted in pigs, mainly the Göttinger and Domesticus breeds. Healthy animals with implants installed in the jaws were predominant among the pig studies. Of the studies evaluating the effect of systemic diseases on osseointegration, 42% were performed in osteoporotic sheep, 32% in diabetic sheep, and 26% in diabetic pigs. Osteoporosis was primarily induced by bilateral ovariectomy and mainly assessed by X-ray densitometry. Diabetes was induced predominantly by intravenous streptozotocin and was confirmed by blood glucose analysis. Histological and histomorphometric analyses were the most frequently employed in the evaluation of osseointegration. The animal models presented unique methodologies for each species in the studies that evaluated dental implants in the context of systemic diseases. Understanding the most commonly used techniques will help methodological choices and the performance of future studies in implantology.
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Affiliation(s)
| | | | | | - Joni Augusto Cirelli
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, State University of São Paulo (Unesp), Brazil
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Silva BLG, Sánchez-Puetate JC, Pinotti FE, Marcantonio CC, Pedroso GG, Junior EM, Marcantonio RAC. Influence of obesity on osseointegration of implants with different surface treatments: A preclinical study. Clin Implant Dent Relat Res 2023; 25:919-928. [PMID: 37309706 DOI: 10.1111/cid.13234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 05/18/2023] [Accepted: 05/22/2023] [Indexed: 06/14/2023]
Abstract
OBJECTIVE The aim of the present study was to evaluate the effect of obesity on the osseointegration of implants with hydrophobic and hydrophilic surfaces. MATERIALS AND METHODS Sixty-four male rats were distributed among four experimental groups: H-HB (Healthy/Hydrophobic): healthy animals with hydrophobic implants; H-HL (Healthy/Hydrophilic): healthy animals with hydrophilic implants; O-HB (Obese/Hydrophobic): animals with induced obesity and hydrophobic implants; O-HL (Obese/Hydrophilic): animals with induced obesity and hydrophilic implants. One hundred and twenty-eight implants were installed in the tibiae of the animals bilaterally (64 on the left tibiae and 64 on the right one) after 75 days of a specific diet (standard or high-fat diet) and euthanasia was performed in the experimental periods of 15 and 45 days after implant placement. Bone formation was assessed by biomechanical analysis (on the left tibiae of each animal), and microtomographic and histomorphometric analyses (on the right tibiae of each animal). Statistical analysis was performed using the Shapiro-Wilk test for normality and ANOVA followed by Tukey test to observe whether there was a significant difference between groups (p < 0.05); the t-test was used to compare the animals' body weight. RESULTS The biomechanical analysis showed an increase in the removal torque value of animals after 45 days in comparison to after 15 days, with the exception of O-HB groups. The microtomographic analysis demonstrated no significant differences in the mineralized bone tissue volume between the groups. In the histomorphometric analysis, the H-HL/45 day group/period demonstrated higher bone-implant contact, in comparison to H-HL/15 days and the O-HL/45 day group/period showed an increase in bone area between the implant threads, in comparison to O-HL/15 days. CONCLUSION In conclusion, obesity does not interfere with the osseointegration of hydrophobic and hydrophilic implants.
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Affiliation(s)
- Bruno Luís Graciliano Silva
- Department of Diagnosis and Surgery, School of Dentistry of Araraquara, São Paulo State University (Unesp), Araraquara, Brazil
| | - Julio Cesar Sánchez-Puetate
- Department of Diagnosis and Surgery, School of Dentistry of Araraquara, São Paulo State University (Unesp), Araraquara, Brazil
| | - Felipe Eduardo Pinotti
- Department of Diagnosis and Surgery, School of Dentistry of Araraquara, São Paulo State University (Unesp), Araraquara, Brazil
| | - Camila Chierici Marcantonio
- Department of Diagnosis and Surgery, School of Dentistry of Araraquara, São Paulo State University (Unesp), Araraquara, Brazil
| | - Gabriel Gimenez Pedroso
- Department of Diagnosis and Surgery, School of Dentistry of Araraquara, São Paulo State University (Unesp), Araraquara, Brazil
| | - Elcio Marcantonio Junior
- Department of Diagnosis and Surgery, School of Dentistry of Araraquara, São Paulo State University (Unesp), Araraquara, Brazil
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Cheng KJ, Shi ZY, Wang R, Jiang XF, Xiao F, Liu YF. 3D printed PEKK bone analogs with internal porosity and surface modification for mandibular reconstruction: An in vivo rabbit model study. BIOMATERIALS ADVANCES 2023; 151:213455. [PMID: 37148594 DOI: 10.1016/j.bioadv.2023.213455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 04/10/2023] [Accepted: 04/28/2023] [Indexed: 05/08/2023]
Abstract
Polyetheretherketone (PEEK) and its derivative polyetherketoneketone (PEKK) have been used as implant materials for spinal fusing and enjoyed their success for many years because of their mechanical properties similar to bone and their chemical inertness. The osseointegration of PEEKs is datable. Our strategy was to use custom-designed and 3D printed bone analogs with an optimized structure design and a modified PEKK surface to augment bone regeneration for mandibular reconstruction. Those bone analogs had internal porosities and a bioactive titanium oxide surface coating to promote osseointegration between native bone and PEKK analogs. Our workflow was 3D modeling, bone analog designing, structural optimization, mechanical analysis via finite element modeling, 3D printing of bone analogs and subsequently, an in vivo rabbit model study on mandibular reconstruction and histology evaluation. Our results showed the finite element analysis validated that the porous PEKK analogs provided a mechanical-sound structure for functional loadings. The bone analogs offered a perfect replacement for segmented bones in the terms of shape, form and volume for surgical reconstruction. The in vivo results showed that bioactive titanium oxide coating enhanced new bone in-growth into the porous PEKK analogs. We have validated our new approach in surgical mandibular reconstruction and we believe our strategy has a significant potential to improve mechanical and biological outcomes for patients who require mandibular reconstruction procedures.
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Affiliation(s)
- Kang-Jie Cheng
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China; Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National "2011 Plan"), Zhejiang University of Technology, Hangzhou 310023, China
| | - Zhen-Yu Shi
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China; Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National "2011 Plan"), Zhejiang University of Technology, Hangzhou 310023, China
| | - Russell Wang
- Department of Comprehensive Care, Case Western Reserve University School of Dental Medicine, Cleveland, OH 44106-4905, USA
| | - Xian-Feng Jiang
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China
| | - Fan Xiao
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China; Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National "2011 Plan"), Zhejiang University of Technology, Hangzhou 310023, China
| | - Yun-Feng Liu
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China; Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou 310023, China; Collaborative Innovation Center of High-end Laser Manufacturing Equipment (National "2011 Plan"), Zhejiang University of Technology, Hangzhou 310023, China.
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Michels R, Kampleitner C, Dobsak T, Doppelmayer K, Heimel P, Lettner S, Tangl S, Gruber R, Benfatti CAM. Impact of a Static Magnetic Field on Early Osseointegration: A Pilot Study in Canines. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1846. [PMID: 36902964 PMCID: PMC10003792 DOI: 10.3390/ma16051846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/17/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
A static magnetic field generated by neodymium-iron-boron (NdFeB) magnets placed in the inner cavity of dental implants can enhance bone regeneration in rabbits. It is, however, unknown whether static magnetic fields support osseointegration in a canine model. We therefore determined the potential osteogenic effect of implants carrying NdFeB magnets inserted in the tibia of six adult canines in the early stages of osseointegration. Here, we report that after 15 days of healing, magnetic and regular implants showed a high variation with a median new bone-to-implant contact (nBIC) in the cortical (41.3% and 7.3%) and the medullary (28.6% and 44.8%) region, respectively. Consistently, the median new bone volume/tissue volume (nBV/TV) in the cortical (14.9% and 5.4%) and the medullary (22.2% and 22.4%) region were not significantly different. One week of healing only resulted in negligible bone formation. These findings suggest that considering the large variation and the pilot nature of this study, magnetic implants failed to support peri-implant bone formation in a canine model.
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Affiliation(s)
- Roberta Michels
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Universidade Federal de Santa Catarina (UFSC), Florianópolis 88036-020, Brazil
- Robert K. Schenk Laboratory of Oral Histology, Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria
| | - Carina Kampleitner
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria
- Ludwig Boltzmann Institute for Traumatology, The Research Center in Cooperation with AUVA, 1200 Vienna, Austria
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Toni Dobsak
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Kevin Doppelmayer
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Patrick Heimel
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria
- Ludwig Boltzmann Institute for Traumatology, The Research Center in Cooperation with AUVA, 1200 Vienna, Austria
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Stefan Lettner
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Stefan Tangl
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
| | - Reinhard Gruber
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
- Department of Oral Biology, Medical University of Vienna, 1090 Vienna, Austria
| | - César Augusto Magalhães Benfatti
- Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Universidade Federal de Santa Catarina (UFSC), Florianópolis 88036-020, Brazil
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Almeida D, Sartoretto SC, Calasans-Maia JDA, Ghiraldini B, Bezerra FJB, Granjeiro JM, Calasans-Maia MD. In vivo osseointegration evaluation of implants coated with nanostructured hydroxyapatite in low density bone. PLoS One 2023; 18:e0282067. [PMID: 36812287 PMCID: PMC9946243 DOI: 10.1371/journal.pone.0282067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 02/07/2023] [Indexed: 02/24/2023] Open
Abstract
OBJECTIVE This in vivo study, aimed to biomechanically, histomorphometrically and histologically evaluate an implant surface coated with nanostructured hydroxyapatite using the wet chemical process (biomimetic deposition of calcium phosphate coating) when compared to a dual acid-etching surface. MATERIAL AND METHODS Ten sheep (2-4 years old) received 20 implants, 10 with nanostructured hydroxyapatite coating (HAnano), and 10 with dual acid-etching surface (DAA). The surfaces were characterized with scanning electron microscopy and energy dispersive spectroscopy; insertion torque values and resonance frequency analysis were measured to evaluate the primary stability of the implants. Bone-implant contact (BIC) and bone area fraction occupancy (BAFo) were evaluated 14 and 28 days after implant installation. RESULTS The HAnano and DAA groups showed no significant difference in insertion torque and resonance frequency analysis. The BIC and BAFo values increased significantly (p<0.05) over the experimental periods in both groups. This event was also observed in BIC value of HAnano group. The HAnano surface showed superior results compared to DAA after 28 days (BAFo, p = 0.007; BIC, p = 0.01). CONCLUSION The results suggest that the HAnano surface favors bone formation when compared to the DAA surface after 28 days in low-density bone in sheep.
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Affiliation(s)
- Daniel Almeida
- Dentistry School, Universidade Federal Fluminense, Niteroi, RJ, Brazil
| | | | | | - Bruna Ghiraldini
- Dental Research Division, Dentistry School, Universidade Paulista, São Paulo, SP, Brazil
| | | | - Jose Mauro Granjeiro
- Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Niterói, RJ, Brazil
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Magnesium surface-activated 3D printed porous PEEK scaffolds for in vivo osseointegration by promoting angiogenesis and osteogenesis. Bioact Mater 2023; 20:16-28. [PMID: 35633876 PMCID: PMC9123089 DOI: 10.1016/j.bioactmat.2022.05.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/01/2022] [Accepted: 05/07/2022] [Indexed: 12/14/2022] Open
Abstract
Polyetheretherketone (PEEK) has been an alternative material for titanium in bone defect repair, but its clinical application is limited by its poor osseointegration. In this study, a porous structural design and activated surface modification were used to enhance the osseointegration capacity of PEEK materials. Porous PEEK scaffolds were manufactured via fused deposition modeling and a polydopamine (PDA) coating chelated with magnesium ions (Mg2+) was utilized on the surface. After surface modification, the hydrophilicity of PEEK scaffolds was significantly enhanced, and bioactive Mg2+ could be released. In vitro results showed that the activated surface could promote cell proliferation and adhesion and contribute to osteoblast differentiation and mineralization; the released Mg2+ promoted angiogenesis and might contribute to the formation of osteogenic H-type vessels. Furthermore, porous PEEK scaffolds were implanted in rabbit femoral condyles for in vivo evaluation of osseointegration. The results showed that the customized three-dimensional porous structure facilitated vascular ingrowth and bone ingrowth within the PEEK scaffolds. The PDA coating enhanced the interfacial osseointegration of porous PEEK scaffolds and the released Mg2+ accelerated early bone ingrowth by promoting early angiogenesis during the coating degradation process. This study provides an efficient solution for enhancing the osseointegration of PEEK materials, which has high potential for translational clinical applications. PEEK materials were modified by structural porosification and surface activation simultaneously. Bioactive Mg2+ released by surface-activated porous PEEK scaffolds enhanced angiogenesis and osteogenesis. Customized three-dimensional porous structure of PEEK scaffolds facilitated vascular ingrowth and bone ingrowth. Surface-activated porous PEEK scaffolds achieved satisfactory osseointegration in vivo.
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Flavonoids from Dalbergia cochinchinensis: Impact on osteoclastogenesis. J Dent Sci 2023; 18:112-119. [PMID: 36643234 PMCID: PMC9831843 DOI: 10.1016/j.jds.2022.06.026] [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: 06/14/2022] [Revised: 06/29/2022] [Indexed: 01/18/2023] Open
Abstract
Background/purpose Dalbergia cochinchinensi has been widely used in traditional medicine because of its flavonoids. This study examined which components in D. cochinchinensis were capable of reducing or even stimulating the formation of bone-resorbing osteoclasts. Materials and methods We have isolated subfamilies of chalcones (isoliquiritigenin, butein), flavones (7-hydroxy-6-methoxyflavone) and neoflavanoids (5-methoxylatifolin), and performed an in vitro bioassay on osteoclastogenesis. The flavonoids were tested for their potential to change the expression of tartrate-resistant acid phosphatase (TRAP) and cathepsin K (CTSK) in murine bone marrow cultures being exposed to RANKL, M-CSF and TGF-β1 using RT-PCR, histochemistry and immunoassay. Results We could confirm that isoliquiritigenin and butein significantly lower the expression of TRAP and CTSK in this setting. Moreover, histochemistry supported the decrease of TRAP by the chalcones. We further observed a trend towards an increase of osteoclastogenesis in the presence of 5-methoxylatifolin and 7-hydroxy-6-methoxyflavone, particular in bone marrow cultures being exposed to RANKL and M-CSF. Consistently, the anti-inflammatory activity was restricted to isoliquiritigenin and butein in murine RAW 264.7 inflammatory macrophages stimulated by lipopolysaccharide (LPS). With respect to osteoblastogenesis, neither of the flavonoids but butyrate, a short chain fatty acid, increased the osteogenic differentiation marker alkaline phosphatase activity in ST2 murine mesenchymal cells. Conclusion We have identified two flavonoids from D. cochinchinensis with a potential pro-osteoclastogenic activity and confirm the anti-osteoclastogenic activity of isoliquiritigenin and butein.
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Panahipour L, Abbasabadi AO, Kaiser V, Sordi MB, Kargarpour Z, Gruber R. Damaged Mesenchymal Cells Dampen the Inflammatory Response of Macrophages and the Formation of Osteoclasts. J Clin Med 2022; 11:jcm11144061. [PMID: 35887825 PMCID: PMC9319356 DOI: 10.3390/jcm11144061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/29/2022] [Accepted: 07/11/2022] [Indexed: 01/25/2023] Open
Abstract
Damage to mesenchymal cells occurs by dental implant drills as a consequence of shear forces and heat generation. However, how the damaged mesenchymal cells can affect the polarization of macrophages and their differentiation into osteoclastogenesis is not fully understood. To simulate cell damage, we exposed suspended ST2 murine bone marrow stromal cells to freeze/thawing or sonication cycles, followed by centrifugation. We then evaluated the lysates for their capacity to modulate lipopolysaccharide-induced macrophage polarization and RANKL-MCSF-TGF-β-induced osteoclastogenesis. We report that lysates of ST2, particularly when sonicated, greatly diminished the expression of inflammatory IL6 and COX2 as well as moderately increased arginase 1 in primary macrophages. That was confirmed by lysates obtained from the osteocytic cell line IDG-SW3. Moreover, the ST2 lysate lowered the phosphorylation of p65 and p38 as well as the nuclear translocation of p65. We further show herein that lysates of damaged ST2 reduced the formation of osteoclast-like cells characterized by their multinuclearity and the expression of tartrate-resistant phosphatase and cathepsin K. Taken together, our data suggest that thermal and mechanical damage of mesenchymal cells causes the release of as-yet-to-be-defined molecules that dampen an inflammatory response and the formation of osteoclasts in vitro.
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Affiliation(s)
- Layla Panahipour
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.); (V.K.); (M.B.S.); (Z.K.)
| | - Azarakhsh Oladzad Abbasabadi
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.); (V.K.); (M.B.S.); (Z.K.)
| | - Viktoria Kaiser
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.); (V.K.); (M.B.S.); (Z.K.)
| | - Mariane Beatriz Sordi
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.); (V.K.); (M.B.S.); (Z.K.)
- Department of Dentistry, Federal University of Santa Catarina, Florianopolis 88040-900, Brazil
| | - Zahra Kargarpour
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.); (V.K.); (M.B.S.); (Z.K.)
| | - Reinhard Gruber
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, 1090 Vienna, Austria; (L.P.); (A.O.A.); (V.K.); (M.B.S.); (Z.K.)
- Department of Periodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
- Austrian Cluster for Tissue Regeneration, 1200 Vienna, Austria
- Correspondence: ; Tel.: +43-(0)-1-40070-2660
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Musskopf ML, Finger Stadler A, Wikesjö UME, Susin C. The minipig intraoral dental implant model: A systematic review and meta-analysis. PLoS One 2022; 17:e0264475. [PMID: 35226690 PMCID: PMC8884544 DOI: 10.1371/journal.pone.0264475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/10/2022] [Indexed: 12/09/2022] Open
Abstract
OBJECTIVES The objective of this report was to provide a review of the minipig intraoral dental implant model including a meta-analysis to estimate osseointegration and crestal bone remodeling. METHODS A systematic review including PubMed and EMBASE databases through June 2021 was conducted. Two independent examiners screened titles/abstracts and selected full-text articles. Studies evaluating titanium dental implant osseointegration in native alveolar bone were included. A quality assessment of reporting was performed. Random-effects meta-analyses and meta-regressions were produced for bone-implant contact (BIC), first BIC, and crestal bone level. RESULTS 125 out of 249 full-text articles were reviewed, 55 original studies were included. Quality of reporting was generally low, omissions included animal characteristics, examiner masking/calibration, and sample size calculation. The typical minipig model protocol included surgical extraction of the mandibular premolars and first molar, 12±4 wks post-extraction healing, placement of three narrow regular length dental implants per jaw quadrant, submerged implant healing and 8 wks of osseointegration. Approximately 90% of studies reported undecalcified incandescent light microscopy histometrics. Overall, mean BIC was 59.88% (95%CI: 57.43-62.33). BIC increased significantly over time (p<0.001): 40.93 (95%CI: 34.95-46.90) at 2 wks, 58.37% (95%CI: 54.38-62.36) at 4 wks, and 66.33% (95%CI: 63.45-69.21) beyond 4 wks. Variability among studies was mainly explained by differences in observation interval post-extraction and post-implant placement, and implant surface. Heterogeneity was high for all studies (I2 > 90%, p<0.001). CONCLUSIONS The minipig intraoral dental implant model appears to effectively demonstrate osseointegration and alveolar bone remodeling similar to that observed in humans and canine models.
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Affiliation(s)
- Marta Liliana Musskopf
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Amanda Finger Stadler
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Ulf ME Wikesjö
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Cristiano Susin
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
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11
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Zhou Y, Tang C, Deng J, Xu R, Yang Y, Deng F. Micro/nano topography of selective laser melting titanium inhibits osteoclastogenesis via mediation of macrophage polarization. Biochem Biophys Res Commun 2021; 581:53-59. [PMID: 34655976 DOI: 10.1016/j.bbrc.2021.09.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 09/08/2021] [Indexed: 12/16/2022]
Abstract
Selective laser melting (SLM) titanium (Ti) implants have shown good prospects for personalized clinical application, but further research is necessary to develop stabilized long-term properties. Since surface modification has been proven bioactive for osseointegration, conventional Ti surface treatment technologies, including sandblasting/acid-etching (SLA) and sandblasting/alkali-heating (SAH), were applied to construct micro and micro/nano surfaces. The SAH group with netlike nano-structure topography exhibited appropriate surface roughness and high hydrophilicity, and as expected, the osseointegration capacities in vivo of the three groups were in order of SAH > SLA > SLM. Besides, both in vivo and in vitro studies revealed that the SLA- and SAH-treated SLM Ti implants significantly inhibited osteoclast activity of peri-implants. Considering the close associations between osteoclasts and macrophages, the effects of Ti surface topography on macrophage polarization were detected. The results showed that the SLA- and SAH-treated SLM Ti implants, especially the latter, had the capacity to promote macrophage polarization to the M2 phenotype. Moreover, the cell culture supernatants of M2 macrophages and RAW264.7 cells seeded on SLA- and SAH-treated SLM Ti surfaces had an adverse effect on osteoclastogenesis. Collectively, this study demonstrated that micro/nano topographies of SLM Ti implants were effective for osseointegration promotion, and their inhibition of osteoclastogenesis might be attributed to macrophage polarization. Our findings shed some light on clinical application of SLM Ti implants and also prove a specific association between macrophage polarization and osteoclastogenesis.
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Affiliation(s)
- Yi Zhou
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, China
| | - Cuizhu Tang
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, China
| | - Jiali Deng
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, China
| | - Ruogu Xu
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, China
| | - Yang Yang
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, China
| | - Feilong Deng
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong, China; Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, China.
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12
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Booth MA, Pope L, Sherrell PC, Stacey A, Tran PA, Fox KE. Polycrystalline diamond coating on 3D printed titanium scaffolds: Surface characterisation and foreign body response. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 130:112467. [PMID: 34702542 DOI: 10.1016/j.msec.2021.112467] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/10/2021] [Accepted: 09/27/2021] [Indexed: 11/16/2022]
Abstract
Titanium-based implants are the leading material for orthopaedic surgery, due to their strength, versatility, fabrication via additive manufacturing and invoked biological response. However, the interface between the implant and the host tissue requires improvement to better integrate the implant material and mitigate foreign body response. The interface can be manipulated by changing the surface energy, chemistry, and topography of the Titanium-based implant. Recently, polycrystalline diamond (PCD) has emerged as an exciting coating material for 3D printed titanium scaffolds showing enhanced mammalian cell functions while inhibiting bacterial attachment in vitro. In this study, we performed in-depth characterisation of PCD coatings investigating the surface topography, thickness, surface energy, and compared its foreign body response in vivo with uncoated titanium scaffold. Coating PCD onto titanium scaffolds resulted in a similar microscale surface roughness (RMS(PCD-coated) = 24 μm; RMS(SLM-Ti) = 28 μm), increased nanoscale roughness (RMS(PCD-coated) = 35 nm; RMS(SLM-Ti) = 66 nm) and a considerable decrease in surface free energy (E(PCD-coated) = 4 mN m-1; E(SLM-Ti) = 16 mN m-1). These surface property changes were supported by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy as corresponding to observed surface chemistry changes induced by the coating. The underlying mechanism of how the diamond coatings chemical and physical properties changes the wettability of implants was examined. In vivo, the coated scaffolds induced similar level of fibrous encapsulation with uncoated scaffolds. This study thus provides further insight into the physicochemical characteristics of PCD coatings, adding evidence to the promising potential of PCD-coatings of medical implants.
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Affiliation(s)
- Marsilea A Booth
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia
| | - Leon Pope
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia
| | - Peter C Sherrell
- Department of Chemical Engineering, The Faculty of Engineering and Information Technology, University of Melbourne, Australia
| | - Alastair Stacey
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia; ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, VIC 3000, Australia
| | - Phong A Tran
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia; Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Kate E Fox
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia.
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13
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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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14
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Rifai A, Tran N, Leitch V, Booth MA, Williams R, Fox K. Osteoblast Cell Response on Polycrystalline Diamond-Coated Additively Manufactured Scaffolds. ACS APPLIED BIO MATERIALS 2021; 4:7509-7516. [PMID: 35006692 DOI: 10.1021/acsabm.1c00757] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Additive manufacturing of metals using selective laser melting can create customized parts with various degrees of complexity and geometry for medical implants. However, challenges remain in accepting orthopedic implants due to the bio-inert surface of metal scaffolds, resulting in a lack of osseointegration. Here, we show that polycrystalline diamond (PCD) coatings on selective laser melted titanium (SLM-Ti) scaffolds can improve the cell-to-material interaction of osteoblasts. The results show that by controlling the uniformity of the diamond coatings, we can mediate the biological response of osteoblasts, such as cell adhesion, proliferation, and spreading. The osteoblasts show favorable cell adhesion and spreading on non-planar PCD-coated scaffolds compared to the un-coated SLM-Ti scaffold. This study plays an important role in understanding the key physicochemical behavior of bone cell growth on customized orthopedic implant materials.
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Affiliation(s)
- Aaqil Rifai
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia.,School of Medicine, Deakin University, Waurn Ponds, VIC 3216, Australia
| | - Nhiem Tran
- School of Science, RMIT University, Melbourne, VIC 3001, Australia
| | - Victoria Leitch
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
| | - Marsilea A Booth
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
| | - Richard Williams
- School of Medicine, Deakin University, Waurn Ponds, VIC 3216, Australia
| | - Kate Fox
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia.,Centre for Additive Manufacturing, RMIT University, Melbourne, VIC 3001, Australia
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15
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Mello-Machado RC, Sartoretto SC, Granjeiro JM, Calasans-Maia JDA, de Uzeda MJPG, Mourão CFDAB, Ghiraldini B, Bezerra FJB, Senna PM, Calasans-Maia MD. Osseodensification enables bone healing chambers with improved low-density bone site primary stability: an in vivo study. Sci Rep 2021; 11:15436. [PMID: 34326400 PMCID: PMC8322171 DOI: 10.1038/s41598-021-94886-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 07/18/2021] [Indexed: 11/19/2022] Open
Abstract
Primary implant stability is a prerequisite for successful implant osseointegration. The osseodensification technique (OD) is a non-subtractive drilling technique that preserves the bone tissue, increases osteotomy wall density, and improves the primary stability. This study aimed to investigate the hypothesis that OD, through a wider osteotomy, produces healing chambers (HCs) at the implant-bone interface without impacting low-density bone primary stability. Twenty implants (3.5 × 10 mm) with a nanohydroxyapatite (nHA) surface were inserted in the ilium of ten sheep. Implant beds were prepared as follows: (i) 2.7-mm-wide using subtractive conventional drilling (SCD) technique (n = 10); (ii) 3.8-mm-wide using an OD bur system (n = 10). The sheep were randomized to two groups, with samples collected at either 14-(n = 5) or 28-days (n = 5) post-surgery and processed for histological and histomorphometric evaluation of bone-implant contact (BIC) and bone area fraction occupancy (BAFO). No significant group differences were found with respect to final insertion torque and implant stability quotient (p > 0.050). BIC values were higher for SCD after 14 and 28 days (p < 0.050); however, BAFO values were similar (p > 0.050). It was possible to conclude that the OD technique allowed a wider implant bed preparation without prejudice on primary stability and bone remodeling.
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Affiliation(s)
- Rafael Coutinho Mello-Machado
- Graduate Program, Dentistry School, Universidade Federal Fluminense, Niterói, Brazil.,Implantology Department, Universidade Iguaçu, Nova Iguaçu, RJ, Brazil
| | - Suelen Cristina Sartoretto
- Oral Surgery Department, Universidade Iguaçu, Nova Iguaçu, RJ, Brazil.,Post-Graduation Program in Dentistry, Universidade Veiga de Almeida, Rio de Janeiro, RJ, Brazil.,Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Rua Mario Santos Braga, 28/4 Floor, Niterói, RJ, Brazil
| | - Jose Mauro Granjeiro
- Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Rua Mario Santos Braga, 28/4 Floor, Niterói, RJ, Brazil.,National Institute of Metrology, Quality and Technology (INMETRO), Duque de Caxias, RJ, Brazil
| | | | - Marcelo Jose Pinheiro Guedes de Uzeda
- Oral Surgery Department, Universidade Iguaçu, Nova Iguaçu, RJ, Brazil.,Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Rua Mario Santos Braga, 28/4 Floor, Niterói, RJ, Brazil
| | | | - Bruna Ghiraldini
- Dental Research Division, Dentistry School, Universidade Paulista, São Paulo, SP, Brazil
| | | | | | - Mônica Diuana Calasans-Maia
- Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Rua Mario Santos Braga, 28/4 Floor, Niterói, RJ, Brazil.
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16
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Talebian R, Kampleitner C, Sagl B, Kuchler U, Dehpour AR, Gruber R. Bone healing around titanium implants in a preclinical model of bile duct ligation-induced liver injury. Clin Oral Implants Res 2021; 32:980-988. [PMID: 34114694 PMCID: PMC8453542 DOI: 10.1111/clr.13792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/12/2021] [Accepted: 05/20/2021] [Indexed: 12/27/2022]
Abstract
Objectives Chronic liver disease increases the risk for periodontal disease and osteoporotic fractures, but its impacts on bone regeneration remain unknown. Herein, we studied the impact of liver cirrhosis on peri‐implant bone formation. Material and Methods A total of 20 male Wistar rats were randomly divided into two groups: one with the common bile duct ligated (BDL) and the respective sham‐treated control group (SHAM). After four weeks of disease induction, titanium mini‐screws were inserted into the tibia. Successful induction of liver cirrhosis was confirmed by the presence of clinical symptoms. Another four weeks later, peri‐implant bone volume per tissue volume (BV/TV) and bone‐to‐implant contact (BIC) were determined by histomorphometric analysis. Results Peri‐implant bone formation was not significantly different between the SHAM and BDL groups. In the cortical compartment, the median percentage of peri‐implant new bone was 10.1% (95% CI of mean 4.0–35.7) and 22.5% (13.8–30.6) in the SHAM and BDL groups, respectively (p = .26). Consistently, the new bone in direct contact with the implant was 18.1% (0.4–37.8) and 23.3% (9.2–32.8) in SHAM and BDL groups, respectively (p = .38). When measuring the medullary compartment, the new bone area was 7.1% (4.8–10.4) and 10.4% (7.2–13.5) in the SHAM and BDL groups, respectively (p = .17). Medullary new bone in direct contact with the implant was 10.0% (1.2–50.4) and 20.6% (16.8–35.3) in SHAM and BDL groups, respectively, and thus comparable between the two groups (p = .46). Conclusions Bile duct ligation has no significant impact on the early stages of peri‐implant bone formation.
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Affiliation(s)
- Reza Talebian
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Experimental Medicine Research Center, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Carina Kampleitner
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Benedikt Sagl
- Department of Prosthodontics, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Ulrike Kuchler
- Department of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Ahmad Reza Dehpour
- Experimental Medicine Research Center, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Reinhard Gruber
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
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17
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Apaza Alccayhuaman KA, Heimel P, Lee JS, Tangl S, Strauss FJ, Stähli A, Matalová E, Gruber R. FasL Is Required for Osseous Healing in Extraction Sockets in Mice. Front Immunol 2021; 12:678873. [PMID: 34135904 PMCID: PMC8200669 DOI: 10.3389/fimmu.2021.678873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/10/2021] [Indexed: 01/15/2023] Open
Abstract
Fas ligand (FasL) is a member of the tumor necrosis factor (TNF) superfamily involved in the activation of apoptosis. Assuming that apoptosis is initiated after tooth extraction it is reasonable to suggest that FasL may play a pivotal role in the healing of extraction sockets. Herein, we tested the hypothesis of whether the lack of FasL impairs the healing of extraction sockets. To this end, we extracted upper right incisors of FasL knockout (KO) mice and their wildtype (WT) littermates. After a healing period of two weeks, bone volume over total volume (BV/TV) via µCT and descriptive histological analyses were performed. µCT revealed that BV/TV in the coronal region of the socket amounted to 39.4% in WT and 21.8% in KO, with a significant difference between the groups (p=0.002). Likewise, in the middle region of the socket, BV/TV amounted to 50.3% in WT and 40.8% in KO (p<0.001). In the apical part, however, no difference was noticed. Consistently, WT mice displayed a significantly higher median trabecular thickness and a lower trabecular separation when compared to the KO group at the coronal and central region of the socket. There was the overall tendency that in both, female and male mice, FasL affects bone regeneration. Taken together, these findings suggest that FasL deficiency may reduce bone regeneration during the healing process of extraction sockets.
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Affiliation(s)
- Karol Alí Apaza Alccayhuaman
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria.,Karl Donath Laboratory for Hard Tissue and Biomaterial Research, School of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Patrick Heimel
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, School of Dentistry, Medical University of Vienna, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria
| | - Jung-Seok Lee
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria.,Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Stefan Tangl
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, School of Dentistry, Medical University of Vienna, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria
| | - Franz J Strauss
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria.,Clinic of Reconstructive Dentistry, University of Zurich, Zurich, Switzerland.,Department of Conservative Dentistry, School of Dentistry, University of Chile, Santiago, Chile
| | - Alexandra Stähli
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Eva Matalová
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czechia
| | - Reinhard Gruber
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria.,Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
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18
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Innovative Surface Modification Procedures to Achieve Micro/Nano-Graded Ti-Based Biomedical Alloys and Implants. COATINGS 2021. [DOI: 10.3390/coatings11060647] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Due to the growing aging population of the world, and as a result of the increasing need for dental implants and prostheses, the use of titanium and its alloys as implant materials has spread rapidly. Although titanium and its alloys are considered the best metallic materials for biomedical applications, the need for innovative technologies is necessary due to the sensitivity of medical applications and to eliminate any potentially harmful reactions, enhancing the implant-to-bone integration and preventing infection. In this regard, the implant’s surface as the substrate for any reaction is of crucial importance, and it is accurately addressed in this review paper. For constructing this review paper, an internet search was performed on the web of science with these keywords: surface modification techniques, titanium implant, biomedical applications, surface functionalization, etc. Numerous recent papers about titanium and its alloys were selected and reviewed, except for the section on forthcoming modern implants, in which extended research was performed. This review paper aimed to briefly introduce the necessary surface characteristics for biomedical applications and the numerous surface treatment techniques. Specific emphasis was given to micro/nano-structured topographies, biocompatibility, osteogenesis, and bactericidal effects. Additionally, gradient, multi-scale, and hierarchical surfaces with multifunctional properties were discussed. Finally, special attention was paid to modern implants and forthcoming surface modification strategies such as four-dimensional printing, metamaterials, and metasurfaces. This review paper, including traditional and novel surface modification strategies, will pave the way toward designing the next generation of more efficient implants.
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19
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Jinno Y, Stocchero M, Galli S, Toia M, Becktor JP. Impact of a Hydrophilic Dental Implant Surface on Osseointegration: Biomechanical Results in Rabbit. J ORAL IMPLANTOL 2021; 47:163-168. [PMID: 32663272 DOI: 10.1563/aaid-joi-d-19-00217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study aimed to evaluate the effect of surface hydrophilicity on the biomechanical aspects of osseointegration of dental implants in the tibia and femur of rabbits. Forty-eight mature female New Zealand White rabbits were included, and 96 commercially pure, Grade 4, titanium dental implants (control group), and 96 implants of same macro geometry with the hydrophilic surface (test group) were used in this study. One osteotomy was performed in each tibia and femur on both sides of the rabbit, and four implants were placed in each rabbit. Control and test groups were randomly allocated on the left and right sides. During surgery, insertion torque (ITQ) value of the complete implant placement was recorded. After healing periods of 0, 2, 4, and 8 weeks after surgery, implant stability quotient (ISQ) value, and removal torque (RTQ) values were measured. No statistical difference was observed for ITQ, for ISQ and for RTQ between the control group and test group in tibia/femur for all time periods. The effect of hydrophilic properties on moderately roughened surfaces has no impact in terms of biomechanical outcomes (ISQ values and RTQ values) after a healing period of 2 to 8 weeks in rabbit tibias /femurs.
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Affiliation(s)
- Yohei Jinno
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Michele Stocchero
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Silvia Galli
- Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Marco Toia
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Jonas P Becktor
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, Malmö, Sweden
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20
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Rousseau N, Msolli I, Chabrand P, Destainville A, Richart O, Milan JL. Local tissue effects and peri-implant bone healing induced by implant surface treatment: an in vivo study in the sheep. J Periodontal Res 2021; 56:789-803. [PMID: 33788298 DOI: 10.1111/jre.12878] [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: 09/02/2020] [Revised: 02/16/2021] [Accepted: 03/03/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of this study was to assess, through biological analysis, the local effects and osseointegration of dental implants incorporating surface micro/nanofeatures compared with implants of identical design without surface treatment. BACKGROUND Known to impact bone cell behavior, surface chemical and topography modifications target improved osseointegration and long-term success of dental implants. Very few studies assess the performance of implants presenting both micro- and nanofeatures in vivo on the animal models used in preclinical studies for medical device certification. METHODS Implant surfaces were characterized in terms of topography and surface chemical composition. After 4 weeks and 13 weeks of implantation in sheep femoral condyles, forty implants were evaluated through micro-computed tomography, histopathologic, and histomorphometric analyses. RESULTS No local adverse effects were observed around implants. Histomorphometric analyses showed significantly higher bone-to-implant contact in the coronal region of the surface-treated implant at week 4 and week 13, respectively, was 79.3 ± 11.2% and 86.4 ± 6.7%, compared with the untreated implants (68.3 ± 8.8% and 74.8 ± 13%). Micro-computed tomography analyses revealed that healing patterns differed between coronal and apical regions, with higher coronal bone-to-implant contact at week 13. Histopathologic results showed, at week 13, bone healing around the surface-treated implant with undistinguishable defect margins, while the untreated implant still presented bone condensation and traces of the initial drill defect. CONCLUSION Our results suggest that the surface-treated implant not only shows no deleterious effects on local tissues but also promotes faster bone healing around the implant.
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Affiliation(s)
- Nicolas Rousseau
- CNRS, ISM, Aix Marseille Univ, Marseille, France.,Selenium Medical, La Rochelle, France
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21
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Zhang Z, Xu R, Yang Y, Liang C, Yu X, Liu Y, Wang T, Yu Y, Deng F. Micro/nano-textured hierarchical titanium topography promotes exosome biogenesis and secretion to improve osseointegration. J Nanobiotechnology 2021; 19:78. [PMID: 33741002 PMCID: PMC7980346 DOI: 10.1186/s12951-021-00826-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/09/2021] [Indexed: 01/03/2023] Open
Abstract
Background Micro/nano-textured hierarchical titanium topography is more bioactive and biomimetic than smooth, micro-textured or nano-textured titanium topographies. Bone marrow mesenchymal stem cells (BMSCs) and exosomes derived from BMSCs play important roles in the osseointegration of titanium implants, but the effects and mechanisms of titanium topography on BMSCs-derived exosome secretion are still unclear. This study determined whether the secretion behavior of exosomes derived from BMSCs is differently affected by different titanium topographies both in vitro and in vivo. Results We found that both micro/nanonet-textured hierarchical titanium topography and micro/nanotube-textured hierarchical titanium topography showed favorable roughness and hydrophilicity. These two micro/nano-textured hierarchical titanium topographies enhanced the spreading areas of BMSCs on the titanium surface with stronger promotion of BMSCs proliferation in vitro. Compared to micro-textured titanium topography, micro/nano-textured hierarchical titanium topography significantly enhanced osseointegration in vivo and promoted BMSCs to synthesize and transport exosomes and then release these exosomes into the extracellular environment both in vitro and in vivo. Moreover, micro/nanonet-textured hierarchical titanium topography promoted exosome secretion by upregulating RAB27B and SMPD3 gene expression and micro/nanotube-textured hierarchical titanium topography promoted exosome secretion due to the strongest enhancement in cell proliferation. Conclusions These findings provide evidence that micro/nano-textured hierarchical titanium topography promotes exosome biogenesis and extracellular secretion for enhanced osseointegration. Our findings also highlight that the optimized titanium topography can increase exosome secretion from BMSCs, which may promote osseointegration of titanium implants. ![]()
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Affiliation(s)
- Zhengchuan Zhang
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Ruogu Xu
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Yang Yang
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Chaoan Liang
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Xiaolin Yu
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Yun Liu
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Tianlu Wang
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Yi Yu
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China
| | - Feilong Deng
- Department of Oral Implantology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, No.56 of LingYuanXiLu, Guangzhou, 510055, Guangdong, People's Republic of China. .,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, People's Republic of China.
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22
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Zhu Y, Goh C, Shrestha A. Biomaterial Properties Modulating Bone Regeneration. Macromol Biosci 2021; 21:e2000365. [PMID: 33615702 DOI: 10.1002/mabi.202000365] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 01/17/2021] [Indexed: 12/19/2022]
Abstract
Biomaterial scaffolds have been gaining momentum in the past several decades for their potential applications in the area of tissue engineering. They function as three-dimensional porous constructs to temporarily support the attachment of cells, subsequently influencing cell behaviors such as proliferation and differentiation to repair or regenerate defective tissues. In addition, scaffolds can also serve as delivery vehicles to achieve sustained release of encapsulated growth factors or therapeutic agents to further modulate the regeneration process. Given the limitations of current bone grafts used clinically in bone repair, alternatives such as biomaterial scaffolds have emerged as potential bone graft substitutes. This review summarizes how physicochemical properties of biomaterial scaffolds can influence cell behavior and its downstream effect, particularly in its application to bone regeneration.
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Affiliation(s)
- Yi Zhu
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, Ontario, M5G 1G6, Canada
| | - Cynthia Goh
- Department of Chemistry, University of Toronto, 80 George Street, Toronto, Ontario, M5S 3H6, Canada.,Department of Materials Science and Engineering, University of Toronto, 84 College Street, Suite 140, Toronto, Ontario, M5S 3E4, Canada
| | - Annie Shrestha
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, Ontario, M5G 1G6, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
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23
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TGF-β Activity of a Demineralized Bone Matrix. Int J Mol Sci 2021; 22:ijms22020664. [PMID: 33440877 PMCID: PMC7827646 DOI: 10.3390/ijms22020664] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 12/25/2022] Open
Abstract
Allografts consisting of demineralized bone matrix (DBM) are supposed to retain the growth factors of native bone. However, it is not clear if transforming growth factor β1 (TGF-β1) is maintained in the acid-extracted human bone. To this aim, the aqueous solutions of supernatants and acid lysates of OraGRAFT® Demineralized Cortical Particulate and OraGRAFT® Prime were prepared. Exposing fibroblasts to the aqueous solution caused a TGF-β receptor type I kinase-inhibitor SB431542-dependent increase in interleukin 11 (IL11), NADPH oxidase 4 (NOX4), and proteoglycan 4 (PRG4) expression. Interleukin 11 expression and the presence of TGF-β1 in the aqueous solutions were confirmed by immunoassay. Immunofluorescence further confirmed the nuclear translocation of Smad2/3 when fibroblasts were exposed to the aqueous solutions of both allografts. Moreover, allografts released matrix metalloprotease-2 activity and blocking proteases diminished the cellular TGF-β response to the supernatant. These results suggest that TGF-β is preserved upon the processing of OraGRAFT® and released by proteolytic activity into the aqueous solution.
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24
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Sartoretto SC, Calasans-Maia J, Resende R, Câmara E, Ghiraldini B, Barbosa Bezerra FJ, Granjeiro JM, Calasans-Maia MD. The Influence of Nanostructured Hydroxyapatite Surface in the Early Stages of Osseointegration: A Multiparameter Animal Study in Low-Density Bone. Int J Nanomedicine 2020; 15:8803-8817. [PMID: 33204089 PMCID: PMC7667590 DOI: 10.2147/ijn.s280957] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 10/10/2020] [Indexed: 01/09/2023] Open
Abstract
Background and Objective The success rates of dental implants in low-density bone have been reported as a challenge, especially for early or immediate loading in the maxilla posterior area. Nanoscale architecture affects the roughness, surface area, surface energy of the implant and can enhance osseointegration. This study aimed to evaluate the implant-surface topography and biomechanical, histomorphometric, and histological bone responses to a new nanostructured hydroxyapatite surface placed in the iliac crest of sheep. Methods Ten female sheep (2–4 years) received 30 implants (n=10/group): HAnano® coated (Epikut Plus®, S.I.N. Implant System, Sao Paulo, SP, Brazil), SLActive (BLX®, Straumann, Basel, Switzerland), and TiUnite (NobelActive®, Nobel Biocare, Göteborg, Sweden) surfaces. Scanning electron microscopy with energy-dispersive spectroscopy evaluated the implant surface topography, the insertion torque value, and resonance frequency analysis evaluated the primary stability, bone-implant contact, and bone-area fraction occupancy were evaluated after 14 and 28 days after implant placement. Results The surface morphology was considerably comparable between the implant groups’; however, the TiUnite® group presented a remarkable different surface. The SLActive® and TiUnite® groups presented an insertion torque average of 74 (±8.9) N/cm that was similar to that of HAnano® 72 (±8.3) N/cm (p >0.05). The resonance frequency evaluated with Osstell®/SmartPeg® or Penguin®/MulTipeg® showed similar results when assessing implants from the same group. BIC and BAFO significantly increased (p<0.05) throughout the experimental periods to all groups, but BIC and BAFO values were similar among the implants at the same time point. After 4 weeks, bone-implant contact was higher than 80% of the total length analyzed. New bone occupies around 60% of analyzed area around the implants. Conclusion HAnano® coated surface promoted comparable osseointegration as SLActive and TiUnite in the sheep model. The three tested surfaces showed comparable osseointegration at the early stages of low-density bone repair in the sheep model.
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Affiliation(s)
- Suelen Cristina Sartoretto
- Oral Surgery Department, Universidade Veiga de Almeida, Rio de Janeiro, RJ, Brazil.,Oral Surgery Department, Universidade Iguaçu, Nova Iguaçu, RJ, Brazil.,Post-Graduation Program in Dentistry, Universidade Veiga de Almeida, Rio de Janeiro, RJ, Brazil.,Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Niteroi, RJ, Brazil
| | - Jose Calasans-Maia
- Orthodontics Department, Dentistry School, Universidade Federal Fluminense, Niteroi, RJ, Brazil
| | - Rodrigo Resende
- Oral Surgery Department, Universidade Iguaçu, Nova Iguaçu, RJ, Brazil.,Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Niteroi, RJ, Brazil.,Oral Surgery Department, Universidade Federal Fluminense, Niteroi, RJ, Brazil
| | - Eduardo Câmara
- Post-Graduation Program in Dentistry, Universidade Veiga de Almeida, Rio de Janeiro, RJ, Brazil
| | - Bruna Ghiraldini
- Dental Research Division, Dentistry School, Universidade Paulista, São Paulo, SP, Brazil
| | | | - Jose Mauro Granjeiro
- Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Niteroi, RJ, Brazil.,National Institute of Metrology, Quality and Technology (INMETRO), Duque de Caxias, RJ, Brazil
| | - Monica Diuana Calasans-Maia
- Clinical Research Laboratory, Dentistry School, Universidade Federal Fluminense, Niteroi, RJ, Brazil.,Oral Surgery Department, Universidade Federal Fluminense, Niteroi, RJ, Brazil
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25
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Wang Q, Zhou P, Liu S, Attarilar S, Ma RLW, Zhong Y, Wang L. Multi-Scale Surface Treatments of Titanium Implants for Rapid Osseointegration: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1244. [PMID: 32604854 PMCID: PMC7353126 DOI: 10.3390/nano10061244] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 05/30/2020] [Accepted: 06/22/2020] [Indexed: 02/06/2023]
Abstract
The propose of this review was to summarize the advances in multi-scale surface technology of titanium implants to accelerate the osseointegration process. The several multi-scaled methods used for improving wettability, roughness, and bioactivity of implant surfaces are reviewed. In addition, macro-scale methods (e.g., 3D printing (3DP) and laser surface texturing (LST)), micro-scale (e.g., grit-blasting, acid-etching, and Sand-blasted, Large-grit, and Acid-etching (SLA)) and nano-scale methods (e.g., plasma-spraying and anodization) are also discussed, and these surfaces are known to have favorable properties in clinical applications. Functionalized coatings with organic and non-organic loadings suggest good prospects for the future of modern biotechnology. Nevertheless, because of high cost and low clinical validation, these partial coatings have not been commercially available so far. A large number of in vitro and in vivo investigations are necessary in order to obtain in-depth exploration about the efficiency of functional implant surfaces. The prospective titanium implants should possess the optimum chemistry, bionic characteristics, and standardized modern topographies to achieve rapid osseointegration.
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Affiliation(s)
- Qingge Wang
- School of Metallurgical Engineering, Xi’an University of Architecture and Technology, No.13 Yanta Road, Xi’an 710055, China;
| | - Peng Zhou
- School of Aeronautical Materials Engineering, Xi’an Aeronautical Polytechnic Institute, Xi’an 710089, China;
| | - Shifeng Liu
- School of Metallurgical Engineering, Xi’an University of Architecture and Technology, No.13 Yanta Road, Xi’an 710055, China;
| | - Shokouh Attarilar
- State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
| | - Robin Lok-Wang Ma
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China; (R.L.-W.M.); (Y.Z.)
| | - Yinsheng Zhong
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China; (R.L.-W.M.); (Y.Z.)
| | - Liqiang Wang
- State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
- National Engineering Research Center for Nanotechnology (NERCN), 28 East JiangChuan Road, Shanghai 200241, China
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26
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Hoornaert A, Vidal L, Besnier R, Morlock JF, Louarn G, Layrolle P. Biocompatibility and osseointegration of nanostructured titanium dental implants in minipigs. Clin Oral Implants Res 2020; 31:526-535. [PMID: 32058629 DOI: 10.1111/clr.13589] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 10/31/2019] [Accepted: 12/22/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVES It is well known that surface treatments of dental implants have a great impact on their rate of osseointegration. The aim of this study was to compare the biocompatibility and the bone-implant contact (BIC) of titanium dental implants with different surface treatments. MATERIAL AND METHODS Test implants (Biotech Dental) had a nanostructured surface and control implants (Anthogyr) were grit-blasted with biphasic calcium phosphate and acid-etched surface. Both titanium implants were inserted in mandible and maxillary bones of 6 Yucatan minipigs for 4 and 12 weeks (n = 10 implants/group). Biocompatibility and osseointegration were evaluated by non-decalcified histology and back-scattered electron microscopy images. RESULTS The reading of histology sections by an antomo-pathologist indicated that the test implants were considered non-irritating to the surrounding tissues and thus biocompatible compared with control implants. The BIC values were higher for test than for control dental implants at both 4 and 12 weeks. CONCLUSIONS In summary, the new nanostructured titanium dental implant is considered biocompatible and showed a better osseointegration than the control implant at both 4 and 12 weeks.
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Affiliation(s)
- Alain Hoornaert
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France.,Inserm, UMR 1238, PHY-OS, Bone Sarcomas and Remodeling of Calcified Tissues, Faculty of Medicine, University of Nantes, Nantes, France
| | - Luciano Vidal
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France
| | - Romain Besnier
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France
| | - Jean-Francois Morlock
- Department of Oral Implantology, Faculty of Dental Surgery, CHU Nantes, Nantes, France
| | - Guy Louarn
- Institut des Matériaux Jean Rouxel (IMN), CNRS, University of Nantes, Nantes, France
| | - Pierre Layrolle
- Inserm, UMR 1238, PHY-OS, Bone Sarcomas and Remodeling of Calcified Tissues, Faculty of Medicine, University of Nantes, Nantes, France
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27
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Pachimalla PR, Mishra SK, Chowdhary R. Evaluation of hydrophilic gel made from Acemannan and Moringa oleifera in enhancing osseointegration of dental implants. A preliminary study in rabbits. J Oral Biol Craniofac Res 2020; 10:13-19. [PMID: 32025481 DOI: 10.1016/j.jobcr.2020.01.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 01/11/2020] [Accepted: 01/19/2020] [Indexed: 02/07/2023] Open
Abstract
Background Hydrophilic implant surface has gained increasing interest as a factor to stimulate osseointegration. Purpose The study was done to formulate hydrophilic gel to be applied on to the dental implant surface, to enhance bone to implant contact (BIC). Materials and methods In first part of study, Acemannan and Moringa oleifera hydro gel formulated in different proportions were coated on the titanium disk and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) assay was done to evaluate cell viability.Cytotoxicity of aqueous extracts of two plants were tested against UMR106 cells. In second part of study, the prototype titanium implants were placed in tibia and femur of 8 male rabbits. Hydrophilic gel formulated from Acemannan and Moringa oleifera were coated on the study groups of implants. Histomorphometric analysis was carried out of the enbloc sections specimens. Student's unpaired t-test was used to compare mean values between the two groups. Results The alkaline phosphatase assay showed least cell inhibition for Acemannan and Moringa oleifera (2:1) as 4.45% and osteoblastic differentiation as 0.328 at 540 nm. Titamium disc coated with hydrogel of Acemannan and Moringa oliefera and seeded with Human MSC shows increased proliferation of osteoblast cells.Compare to study group implants, control group showed no new bone formation. Conclusions Hydrophilic implant surface showed new bone formation with increased bone to implant contact.There was absent of degenerative changes, necrotic changes, fibrosis, and inflammation at the new BIC.
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Affiliation(s)
- Praneeth Raj Pachimalla
- Department of Prosthodontics, Rajarajeswari Dental College and Hospital, Bengaluru, 560074, India
| | - Sunil Kumar Mishra
- Department of Prosthodontics, Peoples College of Dental Sciences & Research Centre, Bhopal, 462037, India
| | - Ramesh Chowdhary
- Department of Prosthodontics, Rajarajeswari Dental College and Hospital, Bengaluru, 560074, India
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Trento GDS, Spin-Neto R, Bassi APF, Okamoto R, Gabrielli MAC, Pereira-Filho VA. Bone tissue formation around two titanium implant surfaces placed in bone defects filled with bone substitute material or blood clot: A pilot study. Clin Implant Dent Relat Res 2019; 21:1175-1180. [PMID: 31691471 DOI: 10.1111/cid.12855] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 09/18/2019] [Accepted: 09/19/2019] [Indexed: 01/07/2023]
Abstract
OBJECTIVES The objective of this study was to evaluate the peri-implant bone tissue formation around titanium implants with different surface treatments, placed in bone defects filled or not with bone substitute material (BSM). MATERIALS AND METHODS Ten animals were divided into two groups according to implant surface treatment. In each tibia, a bone defect was created followed by the placement of one implant. On the left tibia, the defect was filled with blood clot (BC), and on the right tibia, the defect was filled with biphasic hydroxyapatite/β-tricalcium-phosphate (HA/TCP) generating four subgroups: BC-N: blood clot and porous surface; BC-A: blood clot and porous-hydrophilic surface; HA/TCP-N: BSM and porous surface; HA/TCP-A: BSM and porous-hydrophilic surface. The animals were submitted to euthanasia 60 days after implant installation. After light-curing resin inclusion, the blocks containing the implant and the bone tissue were stained and evaluated by means of histomorphometry to assess the percentages of bone implant contact (% BIC). Data was normally distributed and the group differences were examined using the parametric tests of Two-Way ANOVA. RESULTS The BC-A group presented the higher mean value of BIC (46.43%). The HA/TCP-A group presented the higher mean value of BIC. The porous-hydrophilic surfaces presented better results of BIC when compared to the porous surface in both conditions of defect filling. No statistically significant differences were found among all groups (95% confidence interval and P < .05). CONCLUSION According to histomorphometric analysis, after 60-days in a rabbit model, hydrophilic and hydrophobic surfaces have the same behavior in the presence or absence of HA/TCP.
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Affiliation(s)
| | - Rubens Spin-Neto
- Department of Dentistry and Oral Health, Section of Oral Radiology, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Ana Paula Farnezi Bassi
- Department of Oral and Maxillofacial Surgery, School of Dentistry, São Paulo State University, Araçatuba, Brazil
| | - Roberta Okamoto
- Department of Basic Sciences, School of Dentistry, Sao Paulo State University, Araçatuba, Brazil
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Nano-scale modification of titanium implant surfaces to enhance osseointegration. Acta Biomater 2019; 94:112-131. [PMID: 31128320 DOI: 10.1016/j.actbio.2019.05.045] [Citation(s) in RCA: 222] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 12/16/2022]
Abstract
The main aim of this review study was to report the state of art on the nano-scale technological advancements of titanium implant surfaces to enhance the osseointegration process. Several methods of surface modification are chronologically described bridging ordinary methods (e.g. grit blasting and etching) and advanced physicochemical approaches such as 3D-laser texturing and biomimetic modification. Functionalization procedures by using proteins, peptides, and bioactive ceramics have provided an enhancement in wettability and bioactivity of implant surfaces. Furthermore, recent findings have revealed a combined beneficial effect of micro- and nano-scale modification and biomimetic functionalization of titanium surfaces. However, some technological developments of implant surfaces are not commercially available yet due to costs and a lack of clinical validation for such recent surfaces. Further in vitro and in vivo studies are required to endorse the use of enhanced biomimetic implant surfaces. STATEMENT OF SIGNIFICANCE: Grit-blasting followed by acid-etching is currently used for titanium implant modifications, although recent technological biomimetic physicochemical methods have revealed enhanced osteoconductive and anti-microbial outcomes. An improvement in wettability and bioactivity of titanium implant surfaces has been accomplished by combining micro and nano-scale modification and functionalization with protein, peptides, and bioactive compounds. Such morphological and chemical modification of the titanium surfaces induce the migration and differentiation of osteogenic cells followed by an enhancement of the mineral matrix formation that accelerate the osseointegration process. Additionally, the incorporation of bioactive molecules into the nanostructured surfaces is a promising strategy to avoid early and late implant failures induced by the biofilm accumulation.
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30
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Giannobile WV, Berglundh T, Al-Nawas B, Araujo M, Bartold PM, Bouchard P, Chapple I, Gruber R, Lundberg P, Sculean A, Lang NP, Lyngstadaas P, Kebschull M, Galindo-Moreno P, Schwartz Z, Shapira L, Stavropoulos A, Reseland J. Biological factors involved in alveolar bone regeneration: Consensus report of Working Group 1 of the 15 th European Workshop on Periodontology on Bone Regeneration. J Clin Periodontol 2019; 46 Suppl 21:6-11. [PMID: 31215113 DOI: 10.1111/jcpe.13130] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 05/06/2019] [Accepted: 05/07/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIMS To describe the biology of alveolar bone regeneration. MATERIAL AND METHODS Four comprehensive reviews were performed on (a) mesenchymal cells and differentiation factors leading to bone formation; (b) the critical interplay between bone resorbing and formative cells; (c) the role of osteoimmunology in the formation and maintenance of alveolar bone; and (d) the self-regenerative capacity following bone injury or tooth extraction were prepared prior to the workshop. RESULTS AND CONCLUSIONS This summary information adds to the fuller understanding of the alveolar bone regenerative response with implications to reconstructive procedures for patient oral rehabilitation. The group collectively formulated and addressed critical questions based on each of the reviews in this consensus report to advance the field. The report concludes with identified areas of future research.
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Affiliation(s)
- William V Giannobile
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Tord Berglundh
- Department of Periodontology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Bilal Al-Nawas
- Department of Oral, Maxillofacial and Plastic Surgery, J. Gutenberg University of Mainz, Mainz, Germany
| | | | - P Mark Bartold
- School of Dentistry, University of Adelaide, Adelaide, South Australia, Australia
| | | | - Iain Chapple
- School of Dentistry, Institute of Clinical Sciences, College of Medical & Dental Sciences, University of Birmingham, Birmingham, UK
| | - Reinhard Gruber
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria
| | - Pernilla Lundberg
- Department of Odontology, Division of Molecular Periodontology, Umeå University, Umeå, Sweden
| | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | | | | | - Moritz Kebschull
- School of Dentistry, Institute of Clinical Sciences, College of Medical & Dental Sciences, University of Birmingham, Birmingham, UK
| | | | | | - Lior Shapira
- Department of Periodontology, Hebrew University of Jerusalem, Jerusalem, Israel
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31
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Lin G, Zhou C, Lin M, Xu A, He F. Strontium‐incorporated titanium implant surface treated by hydrothermal reactions promotes early bone osseointegration in osteoporotic rabbits. Clin Oral Implants Res 2019; 30:777-790. [PMID: 31104360 DOI: 10.1111/clr.13460] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 04/27/2019] [Accepted: 05/07/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Guofen Lin
- Department of General Dentistry, The Affiliated Stomatology Hospital, School of Medicine Zhejiang University Hangzhou China
| | - Chuan Zhou
- Department of Prosthodontics, The Affiliated Stomatology Hospital, School of Medicine Zhejiang University Hangzhou China
| | - Mengna Lin
- Department of Prosthodontics, The Affiliated Stomatology Hospital, School of Medicine Zhejiang University Hangzhou China
| | - Antian Xu
- Department of Prosthodontics, The Affiliated Stomatology Hospital, School of Medicine Zhejiang University Hangzhou China
| | - Fuming He
- Department of Prosthodontics, The Affiliated Stomatology Hospital, School of Medicine Zhejiang University Hangzhou China
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Strauss FJ, Di Summa F, Stähli A, Matos L, Vaca F, Schuldt G, Gruber R. TGF-β activity in acid bone lysate adsorbs to titanium surface. Clin Implant Dent Relat Res 2019; 21:336-343. [PMID: 30817088 PMCID: PMC6593995 DOI: 10.1111/cid.12734] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/19/2019] [Accepted: 01/22/2019] [Indexed: 11/29/2022]
Abstract
Objectives Osteoblasts lay down new bone on implant surfaces. The underlying cellular mechanism and the spatio‐temporal mode of action, however, remain unclear. It can be proposed that growth factors released upon acidification by osteoclasts adsorb to the implant surface and control the early stages of osseointegration. Methods To simulate bone lysis by osteoclasts, titanium discs were exposed to acid bone lysate (ABL) followed by vigorous washing and seeding of oral fibroblasts. The expression of TGF‐β target genes interleukin 11 (IL11) and NADPH oxidase 4 (NOX4) was evaluated by reverse transcriptase polymerase chain reaction and IL11 ELISA. TGF‐β signaling activation was assessed via Smad2/3 immunofluorescence. The impact of ABL on osteogenic differentiation was determined with murine ST2 mesenchymal stromal cells. Results We report here that ABL‐conditioned titanium discs, independent of turned or rough surface, increased the expression of IL11 and NOX4. This increase was blocked by the TGF‐β receptor 1 antagonist SB431542. Further support for the TGF‐β signaling activation came from the translocation of Smad2/3 into the nucleus of oral fibroblasts. Moreover, titanium discs exposed to ABL decreased alkaline phosphatase and osteopontin in ST2 cells. Conclusions These in vitro findings suggest that titanium can adsorb TGF‐β from ABLs. The data provide a strong impetus for studies on the protein adsorption on implant surfaces in vitro and in vivo, specifically for growth factors including bone‐derived TGF‐β during successful and failed osseointegration.
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Affiliation(s)
- Franz Josef Strauss
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria.,Department of Conservative Dentistry, School of Dentistry, University of Chile, Santiago, Chile
| | - Francesca Di Summa
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria
| | - Alexandra Stähli
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria.,Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Luiza Matos
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria
| | - Fabiola Vaca
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria
| | - Guenther Schuldt
- Department of Periodontics, University of Southern Santa Catarina, Grande Florianopolis, Brazil
| | - Reinhard Gruber
- Department of Oral Biology, Medical University of Vienna, Vienna, Austria
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de Jesus RNR, Carrilho E, Antunes PV, Ramalho A, Moura CCG, Stavropoulos A, Zanetta-Barbosa D. Interfacial biomechanical properties of a dual acid-etched versus a chemically modified hydrophilic dual acid-etched implant surface: an experimental study in Beagles. Int J Implant Dent 2018; 4:28. [PMID: 30259224 PMCID: PMC6158147 DOI: 10.1186/s40729-018-0139-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/29/2018] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND The high survival clinical success rates of osseointegration are requisites for establishing a long-term biomechanical fixation and load-bearing potential of endosseous oral implants. The objective of this preclinical animal study was to evaluate the effect of surface microtopography and chemistry on the early stages of biomechanical rigidity with a sandblasted, dual acid-etched surface, with or without an additional chemical modification (SAE-HD and SAE, respectively), in the tibia of Beagle dogs. METHODS Two pairs of implants, with the same macrogeometry but different surface technology ((a) dual acid-etched surface treatment with hydrochloric and sulfuric acid followed by microwave treatment and insertion in isotonic saline solution to increase hydrophilicity (SAE-HD) (test, n = 12) and (b) dual acid-etched surface (SAE) (control, n = 12)), were installed bilaterally in the proximal tibia of six Beagle dogs. In order to determine the effect of surface modification on biomechanical fixation, a test protocol was established to assess the torque and a complete set of intrinsic properties. Maximum removal torque (in N cm) was the primary outcome measure, while connection stiffness (N cm/rad) and removal energy (× 10-2J) were the secondary outcome measures and were assessed after 2 and 4 weeks in vivo. A general linear statistical model was used and performed for significant differences with the one-way ANOVA followed by Tukey post hoc test (P < 0.05). RESULTS The removal torque values did not reveal significant statistical differences between SAE-HD and SAE implants at any observation times (P = 0.06). Although a slight increase over time could be observed in both test and control groups. SAE-HD showed higher removal energy at 4 weeks (999.35 ± 924.94 × 10- 2 J) compared to that at 2 weeks (421.94 ± 450.58 × 10- 2 J), while SAE displayed lower values at the respective healing periods (P = 0.16). Regarding connection stiffness, there were no significant statistical differences neither within the groups nor over time. There was a strong, positive monotonic correlation between removal torque and removal energy (=0.722, n = 19, P < 0.001). CONCLUSIONS In this study, no significant differences were observed between the specific hydrophilic (SAE-HD) and hydrophobic (SAE) surfaces evaluated, in terms of biomechanical properties during the early osseointegration period.
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Affiliation(s)
- Rainde Naiara Rezende de Jesus
- Department of Periodontology, Faculty of Odontology, Malmö University, Carl Gustafs väg 34, 205-06, Malmö, Sweden.,IBILI, Faculty of Medicine, University of Coimbra, Av. Bissaya Barreto, Bloco de Celas, 3000-075, Coimbra, Portugal
| | - Eunice Carrilho
- IBILI, Faculty of Medicine, University of Coimbra, Av. Bissaya Barreto, Bloco de Celas, 3000-075, Coimbra, Portugal
| | - Pedro V Antunes
- CEMUC, Mechanical Engineering Department, University of Coimbra, Pinhal de Marrocos, 3030-788, Coimbra, Portugal
| | - Amílcar Ramalho
- CEMUC, Mechanical Engineering Department, University of Coimbra, Pinhal de Marrocos, 3030-788, Coimbra, Portugal
| | - Camilla Christian Gomes Moura
- Department of Endodontics, Faculty of Odontology, Federal University of Uberlândia, Av Pará 1720, Bloco4LB, Campus Umuarama, Uberlândia, Minas Gerais, 38405-900, Brazil
| | - Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, Malmö University, Carl Gustafs väg 34, 205-06, Malmö, Sweden.
| | - Darceny Zanetta-Barbosa
- Department of Oral and Maxillofacial Surgery and Implantology, Faculty of Odontology, Federal University of Uberlândia, Av Pará 1720, Bloco4LB, Campus Umuarama, Uberlândia, Minas Gerais, 38405-900, Brazil
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34
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Pinotti FE, de Oliveira GJPL, Aroni MAT, Marcantonio RAC, Marcantonio E. Analysis of osseointegration of implants with hydrophilic surfaces in grafted areas: A Preclinical study. Clin Oral Implants Res 2018; 29:963-972. [DOI: 10.1111/clr.13361] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 06/07/2018] [Accepted: 06/13/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Felipe E. Pinotti
- School of Dentistry; São Paulo State University (Unesp); Araraquara Brazil
| | | | | | | | - Elcio Marcantonio
- School of Dentistry; São Paulo State University (Unesp); Araraquara Brazil
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35
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Burkhardt MA, Gerber I, Moshfegh C, Lucas MS, Waser J, Emmert MY, Hoerstrup SP, Schlottig F, Vogel V. Clot-entrapped blood cells in synergy with human mesenchymal stem cells create a pro-angiogenic healing response. Biomater Sci 2018; 5:2009-2023. [PMID: 28809406 DOI: 10.1039/c7bm00276a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Blood clots stop bleeding and provide cell-instructive microenvironments. Still, in vitro models used to study implant performance typically neglect any possible interactions of recruited cells with surface-adhering blood clots. Here we study the interaction and synergies of bone marrow derived human mesenchymal stem cells (hMSCs) with surface-induced blood clots in an in vitro model by fluorescence microscopy, scanning and correlative light and electron microscopy, ELISA assays and zymography. The clinically used alkali-treated rough titanium (Ti) surfaces investigated here are known to enhance blood clotting compared to native Ti and to improve the healing response, but the underlying mechanisms remain elusive. Here we show that the presence of blood clots synergistically increased hMSC proliferation, extracellular matrix (ECM) remodelling and the release of matrix fragments and angiogenic VEGF, but did not increase the osteogenic differentiation of hMSCs. While many biomaterials are nowadays engineered to release pro-angiogenic factors, we show here that clot-entrapped blood cells on conventional materials in synergy with hMSCs are potent producers of pro-angiogenic factors. Our data might thus not only explain why alkali-treatment is beneficial for Ti implant integration, but they suggest that the physiological importance of blood clots to create pro-angiogenic environments on implants has been greatly underestimated. The importance of blood clots might have been missed because the pro-angiogenic functions get activated only upon stimulation by synergistic interactions with the invading cells.
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Affiliation(s)
- Melanie A Burkhardt
- Department of Health Sciences and Technology, Institute of Translational Medicine, Laboratory of Applied Mechanobiology, ETH Zurich, Vladimir-Prelog-Weg 4, Zurich, 8093, Switzerland.
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36
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Rifai A, Tran N, Lau DW, Elbourne A, Zhan H, Stacey AD, Mayes ELH, Sarker A, Ivanova EP, Crawford RJ, Tran PA, Gibson BC, Greentree AD, Pirogova E, Fox K. Polycrystalline Diamond Coating of Additively Manufactured Titanium for Biomedical Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:8474-8484. [PMID: 29470044 DOI: 10.1021/acsami.7b18596] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Additive manufacturing using selective laser melted titanium (SLM-Ti) is used to create bespoke items across many diverse fields such as medicine, defense, and aerospace. Despite great progress in orthopedic implant applications, such as for "just in time" implants, significant challenges remain with regards to material osseointegration and the susceptibility to bacterial colonization on the implant. Here, we show that polycrystalline diamond coatings on these titanium samples can enhance biological scaffold interaction improving medical implant applicability. The highly conformable coating exhibited excellent bonding to the substrate. Relative to uncoated SLM-Ti, the diamond coated samples showed enhanced mammalian cell growth, enriched apatite deposition, and reduced microbial S. aureus activity. These results open new opportunities for novel coatings on SLM-Ti devices in general and especially show promise for improved biomedical implants.
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Affiliation(s)
| | | | | | | | - Hualin Zhan
- School of Physics , University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Alastair D Stacey
- School of Physics , University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Edwin L H Mayes
- RMIT Microscopy and Microanalysis Facility (RMMF) , RMIT University , Melbourne , Victoria 3001 , Australia
| | | | - Elena P Ivanova
- School of Science , Swinburne University of Technology , Hawthorn , Victoria 3122 , Australia
| | | | - Phong A Tran
- Institute of Health and Biomedical Innovation , Queensland University of Technology , Kelvin Grove , Queensland 4059 , Australia
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37
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Sartoretto SC, Calasans-Maia JDA, Costa YOD, Louro RS, Granjeiro JM, Calasans-Maia MD. Accelerated Healing Period with Hydrophilic Implant Placed in Sheep Tibia. Braz Dent J 2017; 28:559-565. [DOI: 10.1590/0103-6440201601559] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/26/2017] [Indexed: 11/22/2022] Open
Abstract
Abstract The objective of this study was to evaluate the early osseointegration of two different implants surfaces, a sandblasted and acid-etched surface (TN) compared with same geometry and surface roughness modified to be hydrophilic/wettable by conditioning in an isotonic solution of 0.9% sodium-chloride (TA) through histological and histomorphometric analysis after sheep tibia implantation. Forty dental implants, divided in two groups (TN and TA) were placed in the left tibia of twenty healthy, skeletally mature Santa Ines sheep (n=5/experimental period). After 7, 14, 21 and 28 days post-implantation, the samples were removed and the sheep were kept alive. Analysis of resin sections (30 μm) allowed the quantification of bone area (BA) and bone-to-implant contact (BIC). TA group presented nearly 50% increase in BA at 14 days (p<0.001, ANOVA - Tukey’s post test) compared with 7 days. The TA presented higher values than the TN for BA and BIC at 14, 21, and 28 days after placement, stabilizing bone healing. TA hydrophilic surface promoted early osseointegration at 14 and 21 days compared to TN, accelerating bone healing period post-implant placement in sheep tibia.
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Affiliation(s)
| | | | | | | | - José Mauro Granjeiro
- Universidade Federal Fluminense, Brazil; Instituto Nacional de Metrologia, Brazil
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38
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Makowiecki A, Botzenhart U, Seeliger J, Heinemann F, Biocev P, Dominiak M. A comparative study of the effectiveness of early and delayed loading of short tissue-level dental implants with hydrophilic surfaces placed in the posterior section of the mandible—A preliminary study. Ann Anat 2017; 212:61-68. [DOI: 10.1016/j.aanat.2017.02.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 02/22/2017] [Accepted: 02/24/2017] [Indexed: 11/17/2022]
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39
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Gong J, Yang L, He Q, Jiao T. In vitro
evaluation of the biological compatibility and antibacterial activity of a bone substitute material consisting of silver-doped hydroxyapatite and Bio-Oss®. J Biomed Mater Res B Appl Biomater 2017; 106:410-420. [PMID: 28186709 DOI: 10.1002/jbm.b.33843] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Revised: 12/10/2016] [Accepted: 12/19/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Jingjue Gong
- Department of Prosthodontics; Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology; Shanghai 200011 China
| | - Lei Yang
- Department of Prosthodontics; Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology; Shanghai 200011 China
| | - Qi He
- Department of Prosthodontics; Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology; Shanghai 200011 China
| | - Ting Jiao
- Department of Prosthodontics; Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology; Shanghai 200011 China
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40
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Seidling R, Lehmann LJ, Lingner M, Mauermann E, Obertacke U, Schwarz MLR. Analysis of the osseointegrative force of a hyperhydrophilic and nanostructured surface refinement for TPS surfaces in a gap healing model with the Göttingen minipig. J Orthop Surg Res 2016; 11:119. [PMID: 27751181 PMCID: PMC5067893 DOI: 10.1186/s13018-016-0434-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 08/31/2016] [Indexed: 12/02/2022] Open
Abstract
Background A lot of advantages can result in a high wettability as well as a nanostructure at a titanium surface on bone implants. Thus, the aim of this study was to evaluate the osseointegrative potential of a titan plasma-sprayed (TPS) surface refinement by acid-etching with chromosulfuric acid. This results in a hyperhydrophilic surface with a nanostructure and an extreme high wetting rate. Methods In total, 72 dumbbell shape titan implants were inserted in the spongy bone of the femora of 18 Göttingen minipigs in a conservative gap model. Thirty-six titan implants were coated with a standard TPS surface and 36 with the hyperhydrophilic chromosulfuric acid (CSA) surface. After a healing period of 4, 8, and 12 weeks, the animals were killed. The chronological healing process was histomorphometrically analyzed. Results The de novo bone formation, represented by the bone area (BA), is increased by approximately 1.5 times after 12 weeks with little additional benefit by use of the CSA surface. The bone-to-implant contact (BIC), which represents osseoconductive forces, shows results with a highly increased osteoid production in the CSA implants beginning at 8 and 12 weeks compared to TPS. This culminates in a 17-fold increase in BIC after a healing period of 12 weeks. After 4 weeks, significantly more osteoid was seen in the gap as de novo formation in the CSA group (p = 0.0062). Osteoid was also found more frequently after 12 weeks at the CSA-treated surface (p = 0.0355). The site of implantation, intertrochanteric or intercondylar, may influence on the de novo bone formation in the gap. Conclusions There is a benefit by the CSA surface treatment of the TPS layer for osseointegration over an observation time up to 12 weeks. Significant differences were able to be shown in two direct comparisons between the CSA and the TPS surface for osteoid formation in the gap model. Further trials may reveal the benefit of the CSA treatment of the TPS layer involving mechanical tests if possible. Electronic supplementary material The online version of this article (doi:10.1186/s13018-016-0434-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Roland Seidling
- Department for Experimental Orthopaedics and Trauma Surgery, Orthopaedic and Trauma Surgery Centre (OUZ), University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.,Department of Anesthesia and Intensive Care Medicine, Asklepios Südpfalzklinik Kandel, Luitpoldstr. 14, 76870, Kandel, Germany
| | - Lars J Lehmann
- Department for Experimental Orthopaedics and Trauma Surgery, Orthopaedic and Trauma Surgery Centre (OUZ), University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.,Clinic of Trauma and Hand Surgery, Vincentius-Kliniken gAG Karlsruhe, Südendstr. 32, 76137, Karlsruhe, Germany
| | - Manuel Lingner
- Department for Experimental Orthopaedics and Trauma Surgery, Orthopaedic and Trauma Surgery Centre (OUZ), University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.,Clinic for Anaesthesia, Intensive Care and Pain Therapy, BG Trauma Centre, Ludwig-Guttmann-Str. 13, 67071, Ludwigshafen, Germany
| | - Eckhard Mauermann
- Department for Experimental Orthopaedics and Trauma Surgery, Orthopaedic and Trauma Surgery Centre (OUZ), University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.,Department for Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, Spitalstrasse 21, 4031, Basel, Switzerland
| | - Udo Obertacke
- Department for Experimental Orthopaedics and Trauma Surgery, Orthopaedic and Trauma Surgery Centre (OUZ), University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Markus L R Schwarz
- Department for Experimental Orthopaedics and Trauma Surgery, Orthopaedic and Trauma Surgery Centre (OUZ), University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.
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41
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Sartoretto SC, Alves ATNN, Zarranz L, Jorge MZ, Granjeiro JM, Calasans-Maia MD. Hydrophilic surface of Ti6Al4V-ELI alloy improves the early bone apposition of sheep tibia. Clin Oral Implants Res 2016; 28:893-901. [DOI: 10.1111/clr.12894] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2016] [Indexed: 01/05/2023]
Affiliation(s)
| | | | - Laila Zarranz
- Department of Prosthesis; Fluminense Federal University; Niterói RJ Brazil
| | - Mônica Z. Jorge
- Department of Prosthesis; Fluminense Federal University; Niterói RJ Brazil
| | - José M. Granjeiro
- Department of Oral Surgery; Fluminense Federal University; Niterói RJ Brazil
- Department of Oral Surgery; Fluminense Federal University; Niterói, RJ, Brazil and Bioengineering Division; National Institute of Metrology; Quality and Technology; Duque de Caxias RJ Brazil
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42
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Synergistic interactions of blood-borne immune cells, fibroblasts and extracellular matrix drive repair in an in vitro peri-implant wound healing model. Sci Rep 2016; 6:21071. [PMID: 26883175 PMCID: PMC4756324 DOI: 10.1038/srep21071] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 01/18/2016] [Indexed: 01/18/2023] Open
Abstract
Low correlations of cell culture data with clinical outcomes pose major medical challenges with costly consequences. While the majority of biomaterials are tested using in vitro cell monocultures, the importance of synergistic interactions between different cell types on paracrine signalling has recently been highlighted. In this proof-of-concept study, we asked whether the first contact of surfaces with whole human blood could steer the tissue healing response. This hypothesis was tested using alkali-treatment of rough titanium (Ti) surfaces since they have clinically been shown to improve early implant integration and stability, yet blood-free in vitro cell cultures poorly correlated with in vivo tissue healing. We show that alkali-treatment, compared to native Ti surfaces, increased blood clot thickness, including platelet adhesion. Strikingly, blood clots with entrapped blood cells in synergistic interactions with fibroblasts, but not fibroblasts alone, upregulated the secretion of major factors associated with fast healing. This includes matrix metalloproteinases (MMPs) to break down extracellular matrix and the growth factor VEGF, known for its angiogenic potential. Consequently, in vitro test platforms, which consider whole blood-implant interactions, might be superior in predicting wound healing in response to biomaterial properties.
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43
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Sartoretto SC, Alves ATNN, Resende RFB, Calasans-Maia J, Granjeiro JM, Calasans-Maia MD. Early osseointegration driven by the surface chemistry and wettability of dental implants. J Appl Oral Sci 2015. [PMID: 26221922 PMCID: PMC4510662 DOI: 10.1590/1678-775720140483] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Objective The objective of this study was to investigate the impact of two different commercially available dental implants on osseointegration. The surfaces were sandblasting and acid etching (Group 1) and sandblasting and acid etching, then maintained in an isotonic solution of 0.9% sodium chloride (Group 2). Material and Methods X-ray photoelectron spectroscopy (XPS) was employed for surface chemistry analysis. Surface morphology and topography was investigated by scanning electron microscopy (SEM) and confocal microscopy (CM), respectively. Contact angle analysis (CAA) was employed for wetting evaluation. Bone-implant-contact (BIC) and bone area fraction occupied (BAFO) analysis were performed on thin sections (30 μm) 14 and 28 days after the installation of 10 implants from each group (n=20) in rabbits’ tibias. Statistical analysis was performed by ANOVA at the 95% level of significance considering implantation time and implant surface as independent variables. Results Group 2 showed 3-fold less carbon on the surface and a markedly enhanced hydrophilicity compared to Group 1 but a similar surface roughness (p>0.05). BIC and BAFO levels in Group 2 at 14 days were similar to those in Group 1 at 28 days. After 28 days of installation, BIC and BAFO measurements of Group 2 were approximately 1.5-fold greater than in Group 1 (p<0.05). Conclusion The surface chemistry and wettability implants of Group 2 accelerate osseointegration and increase the area of the bone-to-implant interface when compared to those of Group 1.
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Affiliation(s)
| | | | | | - José Calasans-Maia
- Orthodontics Department, Fluminense Federal University, Niteroi, RJ, Brazil
| | - José Mauro Granjeiro
- Instituto Nacional de Metrologia, Normalização e Qualidade Industrial, Duque de Caxias, RJ, Brazil
| | - Mônica Diuana Calasans-Maia
- Dental Clinical Research Center, Dentistry School, Fluminense Federal University, Nitero, Rio de Janeiro, Brazil
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44
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Wen B, Kuhn L, Charles L, Pendrys D, Shafer D, Freilich M. Comparison of bone morphogenetic protein-2 delivery systems to induce supracrestal bone guided by titanium implants in the rabbit mandible. Clin Oral Implants Res 2015; 27:676-85. [DOI: 10.1111/clr.12645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Bo Wen
- Department of Oral and Maxillofacial Surgery; Division of Implant Dentistry; Affiliated Stomatology Hospital of Medical School; Nanjing University; Nanjing China
| | - Liisa Kuhn
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - Lyndon Charles
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - David Pendrys
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - David Shafer
- Department of Craniofacial Sciences; Division of Oral and Maxillofacial Surgery; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - Martin Freilich
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
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Caballé-Serrano J, Schuldt Filho G, Bosshardt DD, Gargallo-Albiol J, Buser D, Gruber R. Conditioned medium from fresh and demineralized bone enhances osteoclastogenesis in murine bone marrow cultures. Clin Oral Implants Res 2015; 27:226-32. [PMID: 25754222 DOI: 10.1111/clr.12573] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2015] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Osteoclasts rapidly form on the surface of bone chips at augmentation sites. The underlying molecular mechanism, however, is unclear. Soluble factors released from bone chips in vitro have a robust impact on mesenchymal cell differentiation. Whether these soluble factors change the differentiation of hematopoietic cells into osteoclasts remains unknown. METHODS Osteoclastogenesis, the formation of tartrate-resistant acid phosphatase-positive multinucleated cells, was studied with murine bone marrow cultures exposed to RANKL and M-CSF, and conditioned medium from fresh (BCM) and demineralized bone matrix (DCM). Histochemical staining, gene and protein expression, as well as viability assays were performed. RESULTS This study shows that BCM had no impact on osteoclastogenesis. However, when BCM was heated to 85°C (BCMh), the number of tartrate-resistant acid phosphatase-positive multinucleated cells that developed in the presence of RANKL and M-CSF approximately doubled. In line with the histochemical observations, there was a trend that BCMh increased expression of osteoclast marker genes, in particular the transcription factor c-fos. The expression of c-fos was significantly reduced by the TGF-β receptor I antagonist SB431542. DCM significantly stimulated osteoclastogenesis, independent of thermal processing. CONCLUSIONS These data demonstrate that activated BCM by heat and DBM are able to stimulate osteoclastogenesis in vitro. These in vitro results support the notion that the resorption of autografts may be supported by as yet less defined paracrine mechanisms.
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Affiliation(s)
- Jordi Caballé-Serrano
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Laboratory of Oral Cell Biology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Guenther Schuldt Filho
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Laboratory of Oral Cell Biology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Department of Implant Dentistry, School of Dentistry, Universidade Federal de Santa Catarina Florianopolis, Florianópolis, Brazil
| | - Dieter D Bosshardt
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Robert K. Schenk Laboratory of Oral Histology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Jordi Gargallo-Albiol
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Daniel Buser
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Reinhard Gruber
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Laboratory of Oral Cell Biology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Department of Oral Biology, Medical University of Vienna, Vienna, Austria
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Gittens RA, Scheideler L, Rupp F, Hyzy SL, Geis-Gerstorfer J, Schwartz Z, Boyan BD. A review on the wettability of dental implant surfaces II: Biological and clinical aspects. Acta Biomater 2014; 10:2907-18. [PMID: 24709541 DOI: 10.1016/j.actbio.2014.03.032] [Citation(s) in RCA: 387] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/26/2014] [Accepted: 03/30/2014] [Indexed: 01/10/2023]
Abstract
Dental and orthopedic implants have been under continuous advancement to improve their interactions with bone and ensure a successful outcome for patients. Surface characteristics such as surface topography and surface chemistry can serve as design tools to enhance the biological response around the implant, with in vitro, in vivo and clinical studies confirming their effects. However, the comprehensive design of implants to promote early and long-term osseointegration requires a better understanding of the role of surface wettability and the mechanisms by which it affects the surrounding biological environment. This review provides a general overview of the available information about the contact angle values of experimental and of marketed implant surfaces, some of the techniques used to modify surface wettability of implants, and results from in vitro and clinical studies. We aim to expand the current understanding on the role of wettability of metallic implants at their interface with blood and the biological milieu, as well as with bacteria, and hard and soft tissues.
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