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Megha M, Mohan CC, Joy A, Unnikrishnan G, Thomas J, Haris M, Bhatt SG, Kolanthai E, Senthilkumar M. Vanadium and strontium co-doped hydroxyapatite enriched polycaprolactone matrices for effective bone tissue engineering: A synergistic approach. Int J Pharm 2024; 659:124266. [PMID: 38788971 DOI: 10.1016/j.ijpharm.2024.124266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/12/2024] [Accepted: 05/21/2024] [Indexed: 05/26/2024]
Abstract
Scientific research targeted at enhancing scaffold qualities has increased significantly during the last few decades. This emphasis frequently centres on adding different functions to scaffolds in order to increase their usefulness as instruments in the field of regenerative medicine. This study aims to investigate the efficacy of a multifunctional sustainable polymer scaffold, specifically Polycaprolactone (PCL) embedded with hydroxyapatite co-doped with vanadium and strontium (HVS), for bone tissue engineering applications. Polycaprolactone was used to fabricate the scaffold, while hydroxyapatite co-doped with vanadium and strontium (HVS) served as the nanofiller. A thorough investigation of the physicochemical and biological characteristics of the HVS nanofiller was carried out using cutting-edge techniques including Dynamic Light Scattering (DLS), and X-ray Photoelectron Spectroscopy (XPS) and in vitro cell studies. A cell viability rate of more than 70 % demonstrated that the synthesised nanofiller was cytotoxic, but in an acceptable range. The mechanical, biological, and physicochemical properties of the scaffold were extensively evaluated after the nanofiller was integrated. The water absorption characteristics of scaffold were enhanced by the addition of HVS nanofillers, leading to increased swelling, porosity, and hydrophilicity. These improvements speed up the flow of nutrients and the infiltration of cells into the scaffold. The scaffold has been shown to have important properties that stimulate bone cell activity, including better biodegradability and improved mechanical strength, which increased from 5.30 ± 0.37 to 10.58 ± 0.42 MPa. Further, its considerable antimicrobial qualities, blood-compatible nature, and capacity to promote biomineralization strengthen its appropriateness for usage in biomedical applications. Mainly, enhanced Alkaline phosphatase (ALP) activity, Alizarin Red Staining (ARS) activity, and excellent cell adhesive properties, indicating the outstanding osteogenic potential observed in rat bone marrow-derived stromal cells (rBMSC). These combined attributes highlight the pivotal role of these nanocomposite scaffolds in the field of bone tissue engineering.
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Affiliation(s)
- M Megha
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India
| | - Chandni C Mohan
- Department of Biotechnology, Cochin University of Science and Technology, Kochi, India
| | - Anjumol Joy
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India; College of Arts and Sciences, Abu Dhabi University, Abu Dhabi, United Arab Emirates
| | - Gayathri Unnikrishnan
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India
| | - Jibu Thomas
- Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, India
| | - M Haris
- Department of Physics, Karunya Institute of Technology and Sciences, Coimbatore, India
| | - Sarita G Bhatt
- Department of Biotechnology, Cochin University of Science and Technology, Kochi, India; Inter University Centre for Nanomaterials and Devices, Cochin University of Science and Technology, Kochi, India
| | - Elayaraja Kolanthai
- Department of Materials Sciences and Engineering, Advanced Materials Processing and Analysis Centre, University of Central Florida, Orlando, FL, USA.
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Saxena K, Ann CM, Azwar MABM, Banavar SR, Matinlinna J, Peters OA, Daood U. Effect of strontium fluoride on mechanical and remineralization properties of enamel: An in-vitro study on a modified orthodontic adhesive. Dent Mater 2024; 40:811-823. [PMID: 38490919 DOI: 10.1016/j.dental.2024.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 01/05/2024] [Accepted: 02/12/2024] [Indexed: 03/17/2024]
Abstract
OBJECTIVES Evaluate the ability of strontium fluoride on bond strength and enamel integrity after incorporation within orthodontic adhesive system as a delivery vehicle. METHODS Experimental orthodontic adhesive system Transbond™ XT were modified with 1% Sr2+, 0.5% SrF2, 1% strontium, 0.5% Sr2+, 1% F-, 0.5% F-, and no additions were control. Mixing of formulation was monitored using Fourier transform infrared spectroscopy. Small-molecule drug-discovery suite was used to gain insights into Sr2+, F-, and SrF2 binding. Shear bond testing was performed after 6-months of ageing. Enamel blocks were cut, and STEM pictures were recorded. Specimens were indented to evaluate elastic modulus. Raman microscope was used to collect Raman spectra and inspected using a scanning electron microscope. Crystal structural analysis was performed using X-ray diffraction. Effect of material on cellular proliferation was determined. Confocal was performed to evaluate the effect of formulation on biofilms. RESULTS FTIR of modified adhesives depicted peak changes within range due to various functional groups existing within samples. TEM represented structurally optimized hexagonal unit-cell of hydroxyapatite. Mean shear bond strength is recorded highest for Transbond XT with 1% SrF2. Dead bacterial percentage appeared higher in 0.5% SrF2 and 1% F- specimens. Crystal lengths showed an increase in 0.5% and 1% SrF2 specimens. Phase contrast within TEM images showed a union of 0.5% SrF2 crystal with enamel crystal with higher elastic modulus and highly mineralized crystalline hydroxyapatite. Intensity of ν1 PO43- and ν1 CO32- along with carbonate - / ν1PO43- ratio displayed good association with strontium fluoride. The formulation showed acceptable cell biocompatibility (p < 0.353). All specimens displayed characteristic diffraction maxima of different apatite angles within XRD. SIGNIFICANCE Experimental results suggested good biocompatibility, adequate mechanical strength, and far-ranging crystallization ability. This would provide a new strategy to overcome the two major challenges of fixed orthodontics, biofilm growth, and demineralization of enamel.
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Affiliation(s)
- Kirti Saxena
- Children and Community Oral Health, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia
| | - Chew Ming Ann
- Restorative Dentistry Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, Wilayah Persekutuan, Kuala Lumpur 57000, Malaysia
| | - Masturina Anati Binti Mohd Azwar
- Restorative Dentistry Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, Wilayah Persekutuan, Kuala Lumpur 57000, Malaysia
| | - Spoorthi Ravi Banavar
- Children and Community Oral Health, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia
| | - Jukka Matinlinna
- Dental Materials Science, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, 34 Hospital Road, Sai Ying Pun, Special Administrative Regions of China; Biomaterials Science, Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Ove A Peters
- Department of Endodontics, Arthur A Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA; School of Dentistry, The University of Queensland, Herston, Qld 4006, Australia
| | - Umer Daood
- Restorative Dentistry Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, Wilayah Persekutuan, Kuala Lumpur 57000, Malaysia; Dental Materials Science, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, 34 Hospital Road, Sai Ying Pun, Special Administrative Regions of China.
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3
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Li CJ, Park JH, Jin GS, Mandakhbayar N, Yeo D, Lee JH, Lee JH, Kim HS, Kim HW. Strontium/Silicon/Calcium-Releasing Hierarchically Structured 3D-Printed Scaffolds Accelerate Osteochondral Defect Repair. Adv Healthc Mater 2024:e2400154. [PMID: 38647029 DOI: 10.1002/adhm.202400154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/24/2024] [Indexed: 04/25/2024]
Abstract
Articular cartilage defects are a global challenge, causing substantial disability. Repairing large defects is problematic, often exceeding cartilage's self-healing capacity and damaging bone structures. To tackle this problem, a scaffold-mediated therapeutic ion delivery system is developed. These scaffolds are constructed from poly(ε-caprolactone) and strontium (Sr)-doped bioactive nanoglasses (SrBGn), creating a unique hierarchical structure featuring macropores from 3D printing, micropores, and nanotopologies due to SrBGn integration. The SrBGn-embedded scaffolds (SrBGn-µCh) release Sr, silicon (Si), and calcium (Ca) ions, which improve chondrocyte activation, adhesion, proliferation, and maturation-related gene expression. This multiple ion delivery significantly affects metabolic activity and maturation of chondrocytes. Importantly, Sr ions may play a role in chondrocyte regulation through the Notch signaling pathway. Notably, the scaffold's structure and topological cues expedite the recruitment, adhesion, spreading, and proliferation of chondrocytes and bone marrow-derived mesenchymal stem cells. Si and Ca ions accelerate osteogenic differentiation and blood vessel formation, while Sr ions enhance the polarization of M2 macrophages. The findings show that SrBGn-µCh scaffolds accelerate osteochondral defect repair by delivering multiple ions and providing structural/topological cues, ultimately supporting host cell functions and defect healing. This scaffold holds great promise for osteochondral repair applications.
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Affiliation(s)
- Cheng Ji Li
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jeong-Hui Park
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
| | - Gang Shi Jin
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
| | - Nandin Mandakhbayar
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
| | - Donghyeon Yeo
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jun Hee Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheongnam-do, 31116, Republic of Korea
- Cell and Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jung-Hwan Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheongnam-do, 31116, Republic of Korea
- Cell and Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hye Sung Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheongnam-do, 31116, Republic of Korea
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheongnam-do, 31116, Republic of Korea
- Cell and Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea
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Wu Y, Huo S, Liu S, Hong Q, Wang Y, Lyu Z. Cu-Sr Bilayer Bioactive Glass Nanoparticles/Polydopamine Functionalized Polyetheretherketone Enhances Osteogenic Activity and Prevents Implant-Associated Infections through Spatiotemporal Immunomodulation. Adv Healthc Mater 2023; 12:e2301772. [PMID: 37723927 DOI: 10.1002/adhm.202301772] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 09/03/2023] [Indexed: 09/20/2023]
Abstract
Key factors contributing to implantation failures include implant-associated infections (IAIs) and insufficient osseointegration of the implants. Polyetheretherketone (PEEK) is widely used in orthopedics, yet its clinical applications are restricted due to its poor osteogenic and antibacterial properties as well as inadequate immune responses. To overcome these drawbacks, a novel spatiotemporal immunomodulation approach is proposed, chelating Cu-Sr bilayer bioactive glass nanoparticles (CS-BGNs) onto the PEEK surface via polydopamine (PDA). The CS-BGNs possess a bilayer core-shell structure where copper is distributed in the outer layer and strontium is clustered in the inner layer. The results show that CS-BGNs/PDA functionalized PEEK demonstrates a controlled and sequential release of Cu2+ and Sr2+ . In the early stage, Cu2+ from the outer layer releases rapidly, while Sr2+ from the inner layer releases in the late stage. This well-ordered release pattern modulates the phenotypic transition of macrophages, which induces M1 polarization in the early stage and M2 polarization in the late stage. Combined with the direct effects of Cu2+ and Sr2+ , the spatiotemporal immunomodulation not only benefits the early antibacterial and tissue-healing process, but also promotes the long-term process of osseointegration, providing new perspectives on the design of novel immunomodulatory biomaterials.
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Affiliation(s)
- Yuezhou Wu
- Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 145 Middle Shandong Road, Shanghai, 200001, China
| | - Shicheng Huo
- Department of Orthopedic Surgery, Spine Center, Changzheng Hospital, Navy Medical University, Shanghai, 200003, China
| | - Shu Liu
- Department of Orthopedic Surgery, Changhai Hospital, The Second Military Medical University, 168 Changhai Road, Shanghai, 200433, China
| | - Qimin Hong
- Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 145 Middle Shandong Road, Shanghai, 200001, China
| | - You Wang
- Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 145 Middle Shandong Road, Shanghai, 200001, China
| | - Zhuocheng Lyu
- Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 145 Middle Shandong Road, Shanghai, 200001, China
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5
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Skalny AV, Aschner M, Silina EV, Stupin VA, Zaitsev ON, Sotnikova TI, Tazina SI, Zhang F, Guo X, Tinkov AA. The Role of Trace Elements and Minerals in Osteoporosis: A Review of Epidemiological and Laboratory Findings. Biomolecules 2023; 13:1006. [PMID: 37371586 DOI: 10.3390/biom13061006] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/07/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
The objective of the present study was to review recent epidemiological and clinical data on the association between selected minerals and trace elements and osteoporosis, as well as to discuss the molecular mechanisms underlying these associations. We have performed a search in the PubMed-Medline and Google Scholar databases using the MeSH terms "osteoporosis", "osteogenesis", "osteoblast", "osteoclast", and "osteocyte" in association with the names of particular trace elements and minerals through 21 March 2023. The data demonstrate that physiological and nutritional levels of trace elements and minerals promote osteogenic differentiation through the up-regulation of BMP-2 and Wnt/β-catenin signaling, as well as other pathways. miRNA and epigenetic effects were also involved in the regulation of the osteogenic effects of trace minerals. The antiresorptive effect of trace elements and minerals was associated with the inhibition of osteoclastogenesis. At the same time, the effect of trace elements and minerals on bone health appeared to be dose-dependent with low doses promoting an osteogenic effect, whereas high doses exerted opposite effects which promoted bone resorption and impaired bone formation. Concomitant with the results of the laboratory studies, several clinical trials and epidemiological studies demonstrated that supplementation with Zn, Mg, F, and Sr may improve bone quality, thus inducing antiosteoporotic effects.
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Affiliation(s)
- Anatoly V Skalny
- Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003 Yaroslavl, Russia
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Ekaterina V Silina
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
| | - Victor A Stupin
- Department of Hospital Surgery No. 1, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Oleg N Zaitsev
- Department of Physical Education, Yaroslavl State Technical University, 150023 Yaroslavl, Russia
| | - Tatiana I Sotnikova
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
- City Clinical Hospital n. a. S.P. Botkin of the Moscow City Health Department, 125284 Moscow, Russia
| | - Serafima Ia Tazina
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
| | - Feng Zhang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, Health Science Center, School of Public Health, Xi'an Jiaotong University, Xi'an 710061, China
| | - Xiong Guo
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, Health Science Center, School of Public Health, Xi'an Jiaotong University, Xi'an 710061, China
| | - Alexey A Tinkov
- Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003 Yaroslavl, Russia
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
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6
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Influence of strontium containing fluorophosphate glass onto structural and mechanical behavior of MTA network. J Mech Behav Biomed Mater 2023; 140:105750. [PMID: 36878080 DOI: 10.1016/j.jmbbm.2023.105750] [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: 12/21/2022] [Revised: 02/26/2023] [Accepted: 02/28/2023] [Indexed: 03/04/2023]
Abstract
OBJECTIVE This study aimed to evaluate the effect of incorporation of strontium based fluoro phosphate glass (SrFPG) 48P2O5-29CaO-14NaO-3CaF2-6SrO on physico chemical and biological properties of mineral trioxide aggregate (MTA). METHODS Optimized SrFPG glass powder were prepared using planetary ball mill and incorporated into MTA in varying proportion (1, 5, 10 wt%) to obtain SrMT1, SrMT5, SrMT10 bio-composite respectively. The bio-composites were characterized using XRD, FTIR and SEM-EDAX before and after soaking for 28 days in stimulated body fluid (SBF) solution. To assess the mechanical properties and biocompatibility of the prepared bio-composite, density, pH analysis, compressive strength and cytotoxicity evaluation using MTT assay were done before and after soaking for 28 days in SBF solution. RESULTS A nonlinear variation in compressive strength and pH values was noted. Of the bio-composites, SrMT10 was evidenced with rich apatite formation in XRD, FTIR and SEM with EDAX analysis. MTT assay showed increased cell viability in all the samples before and after in vitro studies.
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7
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Matos FG, Santana LCL, Cominotte MA, da Silva FS, Vaz LG, de Oliveira DP, Cirelli JA. Strontium-loaded titanium-15molybdenum surface improves physicochemical and biological properties in vitro. Biomed Phys Eng Express 2022; 8. [PMID: 35594845 DOI: 10.1088/2057-1976/ac71cf] [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: 12/22/2021] [Accepted: 05/20/2022] [Indexed: 11/11/2022]
Abstract
The titanium alloy composition and microdesign affect the dynamic interplay between the bone cells and titanium surface in the osseointegration process. The current study aimed to evaluate the surface physicochemical properties, electrochemical stability, and the metabolic response of the MC3T3-E1 cells (pre-osteoblast cell line) cultured onto titanium-15molybdenum (Ti-15Mo) discs treated with phosphoric acid (H3PO4) and sodium hydroxide (NaOH) and/or strontium-loading by the hydrothermal method. The x-ray dispersive energy spectroscopy (EDS) and x-ray diffraction (XRD) analysis showed no trace of impurities and the possible formation of hydrated strontium oxide (H2O2Sr), respectively. The confocal laser microscopy (CLSM) analysis indicated that titanium samples treated with strontium (Sr) showed greater surface roughness. The acid/alkali treatment prior to the hydrothermal Sr deposition improved the surface free energy and resistance to corrosion of the Ti-15Mo alloy. The acid/alkali treatment also provided greater retention of the Sr particles on the Ti-15Mo surfaces accordingly with inductively coupled plasma optical emission spectrometry (ICP-OES) analysis. The AlamarBlue and fluorescence analysis indicated noncytotoxic effects against the MC3T3-E1 cells, which allowed cells' adhesion and proliferation, with greater cells' spreading in the Sr-loaded Ti-15Mo samples. These findings suggest that Sr deposition by the hydrothermal method has the potential to enhance the physicochemical properties of the Ti-15Mo previously etched with H3PO4and NaOH, and also improve the initial events related to cell-mediated bone deposition.
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Affiliation(s)
- Flávia Gomes Matos
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, Sao Paulo State University-UNESP, Araraquara, SP, Brazil
| | - Luís Carlos Leal Santana
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, Sao Paulo State University-UNESP, Araraquara, SP, Brazil
| | - Mariana Aline Cominotte
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, Sao Paulo State University-UNESP, Araraquara, SP, Brazil
| | | | - Luís Geraldo Vaz
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Sao Paulo State University-UNESP, Araraquara, SP, Brazil
| | - Diego Pedreira de Oliveira
- Department of Materials Engineering-DEMa, Federal University of São Carlos-UFSCar, São Carlos, SP, Brazil
| | - Joni Augusto Cirelli
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, Sao Paulo State University-UNESP, Araraquara, SP, Brazil
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8
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Christensen TEK, Berglund Davidsen M, Van Malderen S, Garrevoet J, Offermanns V, Andersen OZ, Foss M, Birkedal H. Local Release of Strontium from Sputter-Deposited Coatings at Implants Increases the Strontium-to-Calcium Ratio in Peri-implant Bone. ACS Biomater Sci Eng 2022; 8:620-625. [PMID: 35099935 DOI: 10.1021/acsbiomaterials.1c01004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It is well known that strontium (Sr) has a significant effect on peri-implant bone healing when administered systemically. Due to the risk of adverse effects of such treatments, new routes focusing on the local, sustained release of Sr from bone-implant contact surfaces have been explored, with success in in vivo experiments. However, the increase of Sr concentrations in the peri-implant bone has not been described in depth yet. Here, we show that a local, sustained Sr release from Ti-Sr-O physical vapor deposition (PVD) coatings by magnetron sputter coating increases the Sr/Ca ratio close to the implant in a rabbit model and that the Sr/Ca background level is reached approximately 500 μm from the implant.
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Affiliation(s)
- Thorbjørn Erik Køppen Christensen
- Department of Chemistry and iNANO, Faculty of Natural Sciences, Aarhus University, 14 Gustav Wieds Vej, 8000 Aarhus, Denmark.,Sino-Danish College (SDC), University of Chinese Academy of Sciences
| | - Maiken Berglund Davidsen
- Department of Chemistry and iNANO, Faculty of Natural Sciences, Aarhus University, 14 Gustav Wieds Vej, 8000 Aarhus, Denmark
| | - Stijn Van Malderen
- Deutsches Elektronen Synchrotron DESY, Notkestr. 85, D-22607 Hamburg, Germany
| | - Jan Garrevoet
- Deutsches Elektronen Synchrotron DESY, Notkestr. 85, D-22607 Hamburg, Germany
| | | | | | - Morten Foss
- Sino-Danish College (SDC), University of Chinese Academy of Sciences.,iNANO and Department of Physics and Astronomy, Faculty of Natural Sciences, Aarhus University, 14 Gustav Wieds Vej, 8000 Aarhus, Denmark
| | - Henrik Birkedal
- Department of Chemistry and iNANO, Faculty of Natural Sciences, Aarhus University, 14 Gustav Wieds Vej, 8000 Aarhus, Denmark
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9
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Grazioli G, Silva AF, Souza JF, David C, Diehl L, Sousa-Neto MD, Cava SS, Fajardo AR, Moraes RR. Synthesis and characterization of poly(vinyl alcohol)/chondroitin sulfate composite hydrogels containing strontium-doped hydroxyapatite as promising biomaterials. J Biomed Mater Res A 2020; 109:1160-1172. [PMID: 32985092 DOI: 10.1002/jbm.a.37108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/21/2020] [Accepted: 09/26/2020] [Indexed: 01/20/2023]
Abstract
Novel poly(vinyl alcohol)/chondroitin sulfate (PVA/CS) composite hydrogels containing hydroxyapatite (HA) or Sr-doped HA (HASr) particles were synthesized by a freeze/thaw method and characterized aiming towards biomedical applications. HA and HASr were synthesized by a wet-precipitation method and added to the composite hydrogels in fractions up to 15 wt%. Physical-chemical characterizations of particles and hydrogels included scanning electron microscopy, energy-dispersive spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetry, porosity, compressive strength/elastic modulus, swelling degree, and cell viability. Particles were irregular in shape and appeared to have narrow size variation. The thermal behavior of composite hydrogels was altered compared to the control (bare) hydrogel. All hydrogels exhibited high porosity. HA/HASr particles reduced total porosity without reducing pore size. The mechanical strength was improved as the fraction of HA or HASr was increased. HASr particles led to a faster water uptake but did not interfere with the total hydrogel swelling capacity. In cell viability essay, increased cell growth (above 120%) was observed in all groups including the control hydrogel, suggesting a bioactive effect. In conclusion, PVA/CS hydrogels containing HA or HASr particles were successfully synthesized and showed promising morphological, mechanical, and swelling properties, which are particularly required for scaffolding.
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Affiliation(s)
- Guillermo Grazioli
- Department of Dental Materials, University of the Republic, Montevideo, Uruguay.,Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - Adriana F Silva
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - Jaqueline F Souza
- Laboratory of Technology and Development of Composites and Polymeric Materials - LaCoPol, Federal University of Pelotas, Pelotas, Brazil
| | - Carla David
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - Lisiane Diehl
- Advanced Crystal Growth and Photonics - CCAF, Federal University of Pelotas, Pelotas, Brazil
| | - Manoel D Sousa-Neto
- Department of Restorative Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Sergio S Cava
- Advanced Crystal Growth and Photonics - CCAF, Federal University of Pelotas, Pelotas, Brazil
| | - André R Fajardo
- Laboratory of Technology and Development of Composites and Polymeric Materials - LaCoPol, Federal University of Pelotas, Pelotas, Brazil
| | - Rafael R Moraes
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
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10
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Kruppke B, Heinemann C, Gebert A, Rohnke M, Weiß M, Henß A, Wiesmann HP, Hanke T. Strontium substitution of gelatin modified calcium hydrogen phosphates as porous hard tissue substitutes. J Biomed Mater Res A 2020; 109:722-732. [PMID: 32654374 DOI: 10.1002/jbm.a.37057] [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] [Received: 10/28/2019] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 12/27/2022]
Abstract
Aiming at the generation of a high strontium-containing degradable bone substitute, the exchange of calcium with strontium in gelatin-modified brushite was investigated. The ion substitution showed two mineral groups, the high-calcium containing minerals with a maximum measured molar Ca/Sr ratio of 80%/20% (mass ratio 63%/37%) and the high-strontium containing ones with a maximum measured molar Ca/Sr ratio of 21%/79% (mass ratio 10%/90%). In contrast to the high-strontium mineral phases, a high mass loss was observed for the calcium-based minerals during incubation in cell culture medium (alpha-MEM), but also an increase in strength owing to dissolution and re-precipitation. This resulted for the former in a decrease of cation concentration (Ca + Sr) in the medium, while the pH value decreased and the phosphate ion concentration rose significantly. The latter group of materials, the high-strontium containing ones, showed only a moderate change in mass and a decrease in strength, but the Ca + Sr concentration remained permanently above the initial calcium concentration in the medium. This might be advantageous for a future planned application by supporting bone regeneration on the cellular level.
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Affiliation(s)
- Benjamin Kruppke
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Christiane Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Annett Gebert
- Institute for Complex Materials, Leibniz-Institute for Solid State and Materials Research Dresden (IFW Dresden), Dresden, Germany
| | - Marcus Rohnke
- Institute of Physical Chemistry, Justus-Liebig-Universität Gießen, Gießen, Germany
| | - Manuel Weiß
- Institute of Physical Chemistry, Justus-Liebig-Universität Gießen, Gießen, Germany
| | - Anja Henß
- Institute of Physical Chemistry, Justus-Liebig-Universität Gießen, Gießen, Germany
| | - Hans-Peter Wiesmann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
| | - Thomas Hanke
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Dresden, Germany
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11
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Prabha RD, Ding M, Bollen P, Ditzel N, Varma HK, Nair PD, Kassem M. Strontium ion reinforced bioceramic scaffold for load bearing bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 109:110427. [PMID: 32228983 DOI: 10.1016/j.msec.2019.110427] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/10/2019] [Accepted: 11/12/2019] [Indexed: 12/16/2022]
Abstract
Bone defects in load bearing areas require bone reconstruction with strong biomaterial having mechanical characteristics like cortical bone. Bioceramics are biomaterials that support bone formation as well as provide adequate mechanical properties. A strontium substitution of the bioceramic is expected to further increase its bioactivity by enhancing osteogenesis and protect the bone from osteoclastic resorption. The study involves development, characterization and in vivo testing of a newly developed strontium substituted hydroxyapatite based bioceramic scaffold (SrHAB) with sufficient biomechanical properties. Optimal concentration of strontium ion required for enhanced osteogenic differentiation was identified by comparing three compositions of SrHAB scaffold; namely Sr10HAB, Sr30HAB and Sr50 HAB for their Alkaline phosphatase activity in vitro. The selected Sr10HAB scaffold demonstrated in vivo bone formation with osteogenic differentiation of stromal derived mesenchymal stem cells (MSC) from human and ovine sources in ectopic and ovine models. Thus, Sr10HAB scaffold has a potential for application in load bearing bone requirements of orthopaedics and dentistry.
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Affiliation(s)
- R D Prabha
- Molecular Endocrinology Laboratory (KMEB), Department of Endocrinology, Odense University Hospital & University of Southern Denmark, Odense, Denmark; Department of Orthodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, India.
| | - Ming Ding
- Orthopaedic Research Laboratory, Department of Orthopaedic Surgery & Traumatology, Odense University Hospital, Institute of Clinical Research, University of Southern Denmark, Denmark
| | - P Bollen
- Biomedical Laboratory, Faculty of Health Science, University of Southern Denmark, Denmark
| | - N Ditzel
- Molecular Endocrinology Laboratory (KMEB), Department of Endocrinology, Odense University Hospital & University of Southern Denmark, Odense, Denmark
| | - H K Varma
- Bioceramic Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, India
| | - P D Nair
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, India
| | - M Kassem
- Molecular Endocrinology Laboratory (KMEB), Department of Endocrinology, Odense University Hospital & University of Southern Denmark, Odense, Denmark; DanStem (Danish Stem Cell Center), Panum Institute, University of Copenhagen, Copenhagen, Denmark
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12
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Bizelli-Silveira C, Abildtrup LA, Spin-Neto R, Foss M, Søballe K, Kraft DCE. Strontium enhances proliferation and osteogenic behavior of bone marrow stromal cells of mesenchymal and ectomesenchymal origins in vitro. Clin Exp Dent Res 2019; 5:541-550. [PMID: 31687189 PMCID: PMC6820574 DOI: 10.1002/cre2.221] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/02/2019] [Accepted: 06/04/2019] [Indexed: 12/19/2022] Open
Abstract
Obejective To investigate the effect of increasing Strontium (Sr) concentrations on the growth and osteogenic behavior of human bone marrow stromal cells (BMSCs) from mesenchymal (i.e., fibula) and ectomesenchymal (i.e., mandible) embryonic origins. Materials and methods Fibula and mandible BMSCs were cultured in media without (Ctrl) or with Sr in four diverse concentrations: Sr1, 11.3 × 10−3 mg/L, human seric physiological level; Sr2, 13 mg/L, human seric level after strontium ranelate treatment; Sr3, 130 mg/L, and Sr4, 360 mg/L. Proliferation rate (1, 3, and 7 days), osteogenic behavior (alkaline phosphatase [ALP] activity, 7 and 14 days; expression of osteogenic genes (ALP, osteopontin, and osteocalcin at 7, 14, and 21 days), and formation of mineralized nodules (14 and 21 days) of the BMSCs were assessed. Data was compared group‐ and period‐wise using analysis of variance tests. Results Fibula and mandible BMSCs cultured with Sr4 showed increased proliferation rate, and osteocalcin and osteopontin gene expression together with more evident formation of mineralized nodules, compared all other Sr concentrations. For both cell populations, Sr4 led to lower ALP activity, and ALP gene expression, compared with the other Sr concentrations. Conclusion BMSCs from mesenchymal (i.e., fibula) and ectomesenchymal (i.e., mandible) embryonic origins showed increased cellular proliferation and osteogenic behavior when cultured with Sr4, in vitro.
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Affiliation(s)
- Carolina Bizelli-Silveira
- Department of Dentistry and Oral Health, Faculty of Health Aarhus University Aarhus Denmark.,Department of Orthopaedic Surgery Aarhus University Hospital Aarhus Denmark
| | - Lisbeth Ann Abildtrup
- Department of Dentistry and Oral Health, Faculty of Health Aarhus University Aarhus Denmark
| | - Rubens Spin-Neto
- Department of Dentistry and Oral Health, Faculty of Health Aarhus University Aarhus Denmark
| | - Morten Foss
- Interdisciplinary Nanoscience Center (iNANO), Department of Physics and Astronomy, Faculty of Science and Technology Aarhus University Aarhus Denmark
| | - Kjeld Søballe
- Department of Orthopaedic Surgery Aarhus University Hospital Aarhus Denmark
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