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Wang H, Xu X, Wang X, Qu W, Qing Y, Li S, Chen B, Ying B, Li R, Qin Y. Performance optimization of biomimetic ant-nest silver nanoparticle coatings for antibacterial and osseointegration of implant surfaces. BIOMATERIALS ADVANCES 2023; 149:213394. [PMID: 37001309 DOI: 10.1016/j.bioadv.2023.213394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/27/2023] [Accepted: 03/15/2023] [Indexed: 05/02/2023]
Abstract
Infection prevention and bone-implant integration remain major clinical challenges. Silver nanoparticle (AgNPs) bone-implant coatings have received extensive attention. Balancing the toxicity and antibacterial properties of AgNP coatings has become a significant problem. In this study, inspired by the structure of the ant-nest, a polyetherimide (PEI) coating with ant-nest structure was prepared, aiming to realize the structural modification of the AgNPs coating. AgNPs were loaded in the inner porous area of the PEI ant-nest coating, avoiding direct contact between AgNPs and cells. The nanopores on the surface of the coating ensured the orderly release of silver ions. SEM, FTIR, XPS, and XRD experiments confirmed that the PEI ant-nest coating was successfully prepared. Interestingly, in the PEI ant-nest coating, Ag+ showed a steady increase in the release trend within 28 days, and there was no early burst release phenomenon. In -vivo experiments showed a good control effect for local infection. In order to improve the osteogenic properties of the materials, 45S5 bioactive glasses (BG) were loaded to achieve further osseointegration. In general, this natural ant-nest-inspired surface modification coating for orthopedic prostheses provides a new strategy for balancing the antibacterial and toxic effects of AgNP coatings.
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Affiliation(s)
- Hao Wang
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Xinyu Xu
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Xingyue Wang
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Wenrui Qu
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Yunan Qing
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Shihuai Li
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Bo Chen
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Boda Ying
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China
| | - Ruiyan Li
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China.
| | - Yanguo Qin
- Department of Orthopaedics, The Second Hospital of Jilin University, Jilin University, Changchun 130041, China.
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Jackson CE, Ramos-Rodriguez DH, Farr NTH, English WR, Green NH, Claeyssens F. Development of PCL PolyHIPE Substrates for 3D Breast Cancer Cell Culture. Bioengineering (Basel) 2023; 10:bioengineering10050522. [PMID: 37237592 DOI: 10.3390/bioengineering10050522] [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: 03/03/2023] [Revised: 04/12/2023] [Accepted: 04/23/2023] [Indexed: 05/28/2023] Open
Abstract
Cancer is a becoming a huge social and economic burden on society, becoming one of the most significant barriers to life expectancy in the 21st century. In particular, breast cancer is one of the leading causes of death for women. One of the most significant difficulties to finding efficient therapies for specific cancers, such as breast cancer, is the efficiency and ease of drug development and testing. Tissue-engineered (TE) in vitro models are rapidly developing as an alternative to animal testing for pharmaceuticals. Additionally, porosity included within these structures overcomes the diffusional mass transfer limit whilst enabling cell infiltration and integration with surrounding tissue. Within this study, we investigated the use of high-molecular-weight polycaprolactone methacrylate (PCL-M) polymerised high-internal-phase emulsions (polyHIPEs) as a scaffold to support 3D breast cancer (MDA-MB-231) cell culture. We assessed the porosity, interconnectivity, and morphology of the polyHIPEs when varying mixing speed during formation of the emulsion, successfully demonstrating the tunability of these polyHIPEs. An ex ovo chick chorioallantoic membrane assay identified the scaffolds as bioinert, with biocompatible properties within a vascularised tissue. Furthermore, in vitro assessment of cell attachment and proliferation showed promising potential for the use of PCL polyHIPEs to support cell growth. Our results demonstrate that PCL polyHIPEs are a promising material to support cancer cell growth with tuneable porosity and interconnectivity for the fabrication of perfusable 3D cancer models.
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Affiliation(s)
- Caitlin E Jackson
- Materials Science and Engineering, The Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
- Insigneo Institute for In Silico Medicine, The Pam Liversidge Building, University of Sheffield, Sheffield S1 3JD, UK
| | | | - Nicholas T H Farr
- Materials Science and Engineering, The Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
- Insigneo Institute for In Silico Medicine, The Pam Liversidge Building, University of Sheffield, Sheffield S1 3JD, UK
| | - William R English
- Norwich Medical School, University of East Anglia, Norwich NR3 7TJ, UK
| | - Nicola H Green
- Materials Science and Engineering, The Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
- Insigneo Institute for In Silico Medicine, The Pam Liversidge Building, University of Sheffield, Sheffield S1 3JD, UK
| | - Frederik Claeyssens
- Materials Science and Engineering, The Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
- Insigneo Institute for In Silico Medicine, The Pam Liversidge Building, University of Sheffield, Sheffield S1 3JD, UK
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Wang H, Zheng TX, Yang NY, Li Y, Sun H, Dong W, Feng LF, Deng JP, Qi MC. Osteogenic and long-term antibacterial properties of Sr/Ag-containing TiO 2 microporous coating in vitro and in vivo. J Mater Chem B 2023; 11:2972-2988. [PMID: 36919628 DOI: 10.1039/d2tb01658c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Bacterial infection and poor osseointegration are two critical issues that need to be solved for long-term use of titanium implants. As such, Sr/Ag-containing TiO2 microporous coatings were prepared on a Ti alloy surface in the current study via a single-step microarc oxidation technique. The coatings showed both good cytocompatibility in vitro and biosafety in vivo. Sr/Ag incorporation brought no significant change in the surface micromorphology and physicochemical properties, but endowed the coating with strong osteogenic activity and long-term antibacterial capability in vitro. Furthermore, the osteogenic and antibacterial capability of the coating was also confirmed in vivo. In a rat osseointegration model, new bone formation, implant-bone contact, removal torque and bone mineralization were all significantly increased in the M-Sr/Ag group when compared with those in group M, although they were slightly lower than those in group M-Sr. In a periimplantitis model, no rats suffered infection in the M-Sr/Ag group after 3 months of osseointegration and 5 weeks of bacterial inoculation period, when compared to 100% and 75% infection rates in M and M-Sr groups, respectively. In addition, active bone remodeling and many mesenchymal cells were observed in the M-Sr group, suggesting good bone regeneration potential in Sr-containing coatings in the case of controlled periimplantitis. Overall, the Sr/Ag-containing TiO2 microporous coating is valuable for preventing periimplantitis and improving implant reosseointegration, and is therefore promising for long-term and high quality use of titanium implants.
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Affiliation(s)
- Huan Wang
- Department of Oral & Maxillofacial Surgery, College of Stomatology, North China University of Science and Technology, 21, Bohai Road, District of Caofeidian (063210), Tangshan City, Hebei Province, P. R. China.
| | - Tian-Xia Zheng
- Department of Oral & Maxillofacial Surgery, College of Stomatology, North China University of Science and Technology, 21, Bohai Road, District of Caofeidian (063210), Tangshan City, Hebei Province, P. R. China.
| | - Nuo-Ya Yang
- Department of Oral & Maxillofacial Surgery, College of Stomatology, North China University of Science and Technology, 21, Bohai Road, District of Caofeidian (063210), Tangshan City, Hebei Province, P. R. China.
| | - Ying Li
- Department of Stomatology, First Hospital of Qinhuangdao, Qinhuangdao City, Hebei Province, China
| | - Hong Sun
- Department of Pathology, College of Basic Medicine, North China University of Science and Technology, Tangshan, Hebei Province, China
| | - Wei Dong
- Department of Oral & Maxillofacial Surgery, College of Stomatology, North China University of Science and Technology, 21, Bohai Road, District of Caofeidian (063210), Tangshan City, Hebei Province, P. R. China.
| | - Li-Fang Feng
- Department of Oral & Maxillofacial Surgery, College of Stomatology, North China University of Science and Technology, 21, Bohai Road, District of Caofeidian (063210), Tangshan City, Hebei Province, P. R. China.
| | - Jiu-Peng Deng
- Department of Oral & Maxillofacial Surgery, College of Stomatology, North China University of Science and Technology, 21, Bohai Road, District of Caofeidian (063210), Tangshan City, Hebei Province, P. R. China.
| | - Meng-Chun Qi
- Department of Oral & Maxillofacial Surgery, College of Stomatology, North China University of Science and Technology, 21, Bohai Road, District of Caofeidian (063210), Tangshan City, Hebei Province, P. R. China.
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Zhai D, Qiu T, Shen J, Feng K. Mechanism of tetraborate and silicate ions on the growth kinetics of microarc oxidation coating on a Ti6Al4V alloy. RSC Adv 2023; 13:5382-5392. [PMID: 36793295 PMCID: PMC9923455 DOI: 10.1039/d2ra07755h] [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: 12/05/2022] [Accepted: 01/31/2023] [Indexed: 02/15/2023] Open
Abstract
The growth kinetics mechanism of microarc oxidation (MAO) coatings on Ti6Al4V alloy was studied by designing a binary mixed electrolyte with various SiO3 2- and B4O7 2- ion ratios via scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and potentiodynamic polarization. When the ratio of B4O7 2- in the electrolyte is 100%, B4O7 2- dissolves molten TiO2 at a high temperature, exposing nano-scale filamentary channels in the barrier layer of MAO coating, resulting in the repeated nucleation of microarc in the same area. When the ratio of SiO3 2- in the binary mixed electrolyte reaches 10%, the amorphous SiO2 formed by SiO3 2- at high temperatures from discharge blocks discharge channels and induces microarc nucleation in other regions, thus inhabiting the discharge cascade phenomenon. When the ratio of SiO3 2- in the binary mixed electrolyte increases from 15% to 50%, the amounts of molten oxides cover some of the pores formed by the primary microarc discharge, so part of the secondary discharge preferentially generates in the uncovered pores. Finally, the discharge cascade phenomenon occurs. Moreover, the thickness of the MAO coating obtained in the binary mixed electrolyte containing B4O7 2- and SiO3 2- shows a power function with time.
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Affiliation(s)
- Dajun Zhai
- College of Materials Science and Engineering, Chongqing University Chongqing 400044 China
| | - Tao Qiu
- College of Materials Science and Engineering, Chongqing University Chongqing 400044 China
| | - Jun Shen
- College of Materials Science and Engineering, Chongqing University Chongqing 400044 China
| | - Keqin Feng
- College of Mechanical Engineering, Sichuan University Chengdu 610065 China
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Geng T, Wang Y, Lin K, Zhang C, Wang J, Liu Y, Yuan C, Wang P. Strontium-doping promotes bone bonding of titanium implants in osteoporotic microenvironment. Front Bioeng Biotechnol 2022; 10:1011482. [PMID: 36185426 PMCID: PMC9520299 DOI: 10.3389/fbioe.2022.1011482] [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: 08/04/2022] [Accepted: 08/19/2022] [Indexed: 11/13/2022] Open
Abstract
Osteoporosis is a major challenge to oral implants, and this study focused on improving the osseointegration ability of titanium (Ti) implants in osteoporosis environment via surface modification, including doping of strontium ion and preparation of nanoscale surface feature. Our previous studies have shown that strontium (Sr) ions can enhance osteogenic activity. Therefore, we aimed to comprehensively evaluate the effect of hydrothermal treatment of Sr-doped titanium implant coating on bone-binding properties in the microenvironment of osteoporosis in this study. We fabricated Sr-doped nanocoating (AHT-Sr) onto the surface of titanium implants via hydrothermal reaction. The rough Sr-doping had good biological functions and could apparently promote osteogenic differentiation of osteoporotic bone marrow mesenchymal stem cells (OVX-BMSCs). Most importantly, AHT-Sr significantly promoted bone integration in the osteoporosis environment. This study provides an effective approach to implant surface modification for better osseointegration in an osteoporotic environment.
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Affiliation(s)
- Tengyu Geng
- School of Stomatology, Xuzhou Medical University, Xuzhou, China
- Department of Dental Implant, The Affiliated Stomatological Hospital of Xuzhou Medical University, Xuzhou, China
| | - Yiru Wang
- School of Stomatology, Xuzhou Medical University, Xuzhou, China
- Department of Dental Implant, The Affiliated Stomatological Hospital of Xuzhou Medical University, Xuzhou, China
| | - Kaili Lin
- Department of Oral & Cranio-Maxillofacial Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, China
| | - Cheng Zhang
- School of Stomatology, Xuzhou Medical University, Xuzhou, China
| | - Jing Wang
- School of Stomatology, Xuzhou Medical University, Xuzhou, China
| | - Ya Liu
- School of Stomatology, Xuzhou Medical University, Xuzhou, China
| | - Changyong Yuan
- School of Stomatology, Xuzhou Medical University, Xuzhou, China
- Department of Dental Implant, The Affiliated Stomatological Hospital of Xuzhou Medical University, Xuzhou, China
- *Correspondence: Penglai Wang, ; Changyong Yuan,
| | - Penglai Wang
- School of Stomatology, Xuzhou Medical University, Xuzhou, China
- Department of Dental Implant, The Affiliated Stomatological Hospital of Xuzhou Medical University, Xuzhou, China
- *Correspondence: Penglai Wang, ; Changyong Yuan,
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Ma Y, You Y, Cao L, Liang B, Tian B, Dong J, Lin H. Improved Osteogenesis by Mineralization Combined With Double-Crosslinked Hydrogel Coating for Proliferation and Differentiation of Mesenchymal Stem Cells. Front Bioeng Biotechnol 2021; 9:706423. [PMID: 34917593 PMCID: PMC8670089 DOI: 10.3389/fbioe.2021.706423] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 10/06/2021] [Indexed: 11/23/2022] Open
Abstract
In consideration of improving the interface problems of poly-L-lactic acid (PLLA) that hindered biomedical use, surface coatings have been explored as an appealing strategy in establishing a multi-functional coating for osteogenesis. Though the layer-by-layer (LBL) coating developed, a few studies have applied double-crosslinked hydrogels in this technique. In this research, we established a bilayer coating with double-crosslinked hydrogels [alginate–gelatin methacrylate (GelMA)] containing bone morphogenic protein (BMP)-2 [alginate-GelMA/hydroxyapatite (HA)/BMP-2], which displayed great biocompatibility and osteogenesis. The characterization of the coating showed improved properties and enhanced wettability of the native PLLA. To evaluate the biosafety and inductive ability of osteogenesis, the behavior (viability, adherence, and proliferation) and morphology of human bone mesenchymal stem cells (hBMSCs) on the bilayer coatings were tested by multiple exams. The satisfactory function of osteogenesis was verified in bilayer coatings. We found the best ratios between GelMA and alginate for biological applications. The Alg70-Gel30 and Alg50-Gel50 groups facilitated the osteogenic transformation of hBMSCs. In brief, alginate-GelMA/HA/BMP-2 could increase the hBMSCs’ early transformation of osteoblast lineage and promote the osteogenesis of bone defect, especially the outer hydrogel layer such as Alg70-Gel30 and Alg50-Gel50.
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Affiliation(s)
- Yiqun Ma
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yuwang You
- Hospital Infection Management Department, Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Lu Cao
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Bing Liang
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University (Xiamen Branch), Xiamen, China
| | - Bo Tian
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jian Dong
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hong Lin
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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Li X, Yi D, Wu X, Zhang J, Yang X, Zhao Z, Wang J, Liu B, Bai P. Study on Mechanism of Structure Angle on Microstructure and Properties of SLM-Fabricated 316L Stainless Steel. Front Bioeng Biotechnol 2021; 9:778332. [PMID: 34805125 PMCID: PMC8595114 DOI: 10.3389/fbioe.2021.778332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 09/23/2021] [Indexed: 11/13/2022] Open
Abstract
In this study, seven 316L stainless steel (316L SS) bulks with different angles (0°, 15°, 30°, 45°, 60°, 75°, and 90°) relative to a build substrate were built via selective laser melting (SLM). The influences of different angles on the metallography, microstructure evolution, tensile properties, and corrosion resistance of 316L SS were studied. The 0° sample showed the morphology of corrugated columnar grains, while the 90° sample exhibited equiaxed grains but with a strong <101> texture. The 60° sample had a good strength and plasticity: the tensile strength with 708 MPa, the yield strength with 588 MPa, and the elongation with 54.51%. The dislocation strengthening and grain refinement play a vital role in the mechanical properties for different anisotropy of the SLM-fabricated 316L SS. The 90° sample had greater toughness and corrosion resistance, owing to the higher volume fraction of low-angle grain boundaries and finer grains.
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Affiliation(s)
- Xiaofeng Li
- School of Materials Science and Engineering, North University of China, Taiyuan, China
- The State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
| | - Denghao Yi
- School of Materials Science and Engineering, North University of China, Taiyuan, China
- Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China
| | - Xiaoyu Wu
- School of Materials Science and Engineering, North University of China, Taiyuan, China
| | - Jinfang Zhang
- School of Materials Science and Engineering, North University of China, Taiyuan, China
- The State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
| | - Xiaohui Yang
- Instrumental Analysis Center, Taiyuan University of Science and Technology, Taiyuan, China
| | - Zixuan Zhao
- The State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
| | - Jianhong Wang
- School of Materials Science and Engineering, North University of China, Taiyuan, China
| | - Bin Liu
- The State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China
| | - Peikang Bai
- School of Materials Science and Engineering, North University of China, Taiyuan, China
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Evaluation of fluorohydroxyapatite/strontium coating on titanium implants fabricated by hydrothermal treatment. Prog Biomater 2021; 10:185-194. [PMID: 34370267 DOI: 10.1007/s40204-021-00162-7] [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] [Received: 04/13/2021] [Accepted: 08/03/2021] [Indexed: 10/20/2022] Open
Abstract
Titanium and its alloys are considered as appropriate replacements for the irreparable bone. Calcium phosphate coatings are widely used to improve the osteoinduction and osseointegration ability of titanium alloys. To further improve the performance of the calcium phosphate-coated implants, strontium (Sr) was introduced to partially replace the calcium ions. In this study, the effect of Sr ion addition on the fluorohydroxyapatite (FHA)-coated Ti6Al4V alloy was investigated and all the coatings were treated under hydrothermal condition. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to investigate the phases and microstructures, respectively. Shear tests were done to evaluate the bond strength of the coating layer. MTT, adhesion, and alkaline phosphatase tests were performed to evaluate the biocompatibility and osteogenic behavior of the samples. Results showed that the average crystallite size for the strontium-doped FHA samples was 48 nm and the bond strength had increased 13.15% in comparison with FHA-coated samples. Analysis of variance showed p value for all MTT tests at more than 0.322 and there was not any evidence of cell death after 7 days. The results of the ALP test showed that the increase of the cell activity in Sr samples from day 7 to 14 is three times higher than the FHA ones.
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Chen W, Zhu WQ, Qiu J. Impact of exogenous metal ions on peri-implant bone metabolism: a review. RSC Adv 2021; 11:13152-13163. [PMID: 35423842 PMCID: PMC8697588 DOI: 10.1039/d0ra09395e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 03/25/2021] [Indexed: 11/21/2022] Open
Abstract
The development of effective methods to promote the osseointegration of dental implants by surface modification is an area of intense research in dental materials science. Exogenous metal ions present in the implant and surface modifications are closely related to the bone metabolism around the implant. In the complex oral microenvironment, the release of metal ions caused by continuous corrosion of dental implants has an unfavorable impact on the surrounding tissue, and then affects osseointegration, leading to bad results such as loosening and falling off in the late stage of the implant. Besides, these ions can even be distributed in distant tissues and organs. Currently, surface modification techniques are being developed that involve different processing technologies including the introduction of exogenous metal ions with different properties onto the surface of implants to improve performance. However, most metal elements have some level of biological toxicity and can only be used within a safe concentration range to exert the optimum biological effects on recipients. In this paper, we review the adverse effects of metal ions on osseointegration and highlight the emerging applications for metal elements in improving the performance of dental implants.
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Affiliation(s)
- Wei Chen
- Department of Oral Implantology, Affiliated Hospital of Stomatology, Nanjing Medical University Nanjing 210029 PR China +86 25 69593085
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University Nanjing 210029 PR China
| | - Wen-Qing Zhu
- Department of Oral Implantology, Affiliated Hospital of Stomatology, Nanjing Medical University Nanjing 210029 PR China +86 25 69593085
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University Nanjing 210029 PR China
| | - Jing Qiu
- Department of Oral Implantology, Affiliated Hospital of Stomatology, Nanjing Medical University Nanjing 210029 PR China +86 25 69593085
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University Nanjing 210029 PR China
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Osteoconductive and Osteoinductive Surface Modifications of Biomaterials for Bone Regeneration: A Concise Review. COATINGS 2020. [DOI: 10.3390/coatings10100971] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The main aim of bone tissue engineering is to fabricate highly biocompatible, osteoconductive and/or osteoinductive biomaterials for tissue regeneration. Bone implants should support bone growth at the implantation site via promotion of osteoblast adhesion, proliferation, and formation of bone extracellular matrix. Moreover, a very desired feature of biomaterials for clinical applications is their osteoinductivity, which means the ability of the material to induce osteogenic differentiation of mesenchymal stem cells toward bone-building cells (osteoblasts). Nevertheless, the development of completely biocompatible biomaterials with appropriate physicochemical and mechanical properties poses a great challenge for the researchers. Thus, the current trend in the engineering of biomaterials focuses on the surface modifications to improve biological properties of bone implants. This review presents the most recent findings concerning surface modifications of biomaterials to improve their osteoconductivity and osteoinductivity. The article describes two types of surface modifications: (1) Additive and (2) subtractive, indicating biological effects of the resultant surfaces in vitro and/or in vivo. The review article summarizes known additive modifications, such as plasma treatment, magnetron sputtering, and preparation of inorganic, organic, and composite coatings on the implants. It also presents some common subtractive processes applied for surface modifications of the biomaterials (i.e., acid etching, sand blasting, grit blasting, sand-blasted large-grit acid etched (SLA), anodizing, and laser methods). In summary, the article is an excellent compendium on the surface modifications and development of advanced osteoconductive and/or osteoinductive coatings on biomaterials for bone regeneration.
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11
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Tissue Integration and Biological Cellular Response of SLM-Manufactured Titanium Scaffolds. METALS 2020. [DOI: 10.3390/met10091192] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Background: SLM (Selective Laser Melting)–manufactured Titanium (Ti) scaffolds have a significant value for bone reconstructions in the oral and maxillofacial surgery field. While their mechanical properties and biocompatibility have been analysed, there is still no adequate information regarding tissue integration. Therefore, the aim of this study is a comprehensive systematic assessment of the essential parameters (porosity, pore dimension, surface treatment, shape) required to provide the long-term performance of Ti SLM medical implants. Materials and methods: A systematic literature search was conducted via electronic databases PubMed, Medline and Cochrane, using a selection of relevant search MeSH terms. The literature review was conducted using the preferred reporting items for systematic reviews and meta-analysis (PRISMA). Results: Within the total of 11 in vitro design studies, 9 in vivo studies, and 4 that had both in vitro and in vivo designs, the results indicated that SLM-generated Ti scaffolds presented no cytotoxicity, their tissue integration being assured by pore dimensions of 400 to 600 µm, high porosity (75–88%), hydroxyapatite or SiO2–TiO2 coating, and bioactive treatment. The shape of the scaffold did not seem to have significant importance. Conclusions: The SLM technique used to fabricate the implants offers exceptional control over the structure of the base. It is anticipated that with this technique, and a better understanding of the physical interaction between the scaffold and bone tissue, porous bases can be tailored to optimize the graft’s integrative and mechanical properties in order to obtain structures able to sustain osseous tissue on Ti.
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