1
|
Qiao D, Cheng S, Xing Z, Zhang Q, Song S, Yan F, Zhang Y. Bio-inspired glycosylated nano-hydroxyapatites enhance endogenous bone regeneration by modulating macrophage M2 polarization. Acta Biomater 2023; 162:135-148. [PMID: 36967053 DOI: 10.1016/j.actbio.2023.03.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 03/16/2023] [Accepted: 03/20/2023] [Indexed: 04/08/2023]
Abstract
A macrophage-associated immune response is vital in bone regeneration. Mannose receptor (MR), a macrophage pattern-recognition receptor, is crucial for the maintenance of immune homeostasis. Here, we designed MR-targeted glycosylated nano-hydroxyapatites (GHANPs) to reprogram macrophages into polarized M2s, promoting bone regeneration by improving the osteoimmune microenvironment. The prepared GHANPs induced macrophage M2 polarization, which then promoted osteoblastic differentiation of stem cells. Further, the mechanistic study showed that GHANPs might influence macrophage polarization by modulating cell metabolism, including enhancing mitochondrial oxidative phosphorylation and activating autophagy. Finally, a rat cranial defect model was used to verify the effect of GHANPs on endogenous bone regeneration in vivo, revealing that GHANPs promoted bone regeneration within the defect and increased the ratio of M2/M1 macrophages in early bone repair. Our results indicate that the MR-targeted macrophage M2 polarization strategy is promising in endogenous bone regeneration. STATEMENT OF SIGNIFICANCE: Macrophage is a pivotal immunity component for bone regeneration. A switch to M2 macrophage has been considered to contribute to osteogenesis. For inducing macrophage M2 polarization, an effective strategy to overcome off-target effects and insufficient specificity is a critical challenge. The mannose receptor on the surface of macrophages has been involved in regulating macrophage directional polarization. The glucomannan presented on the nano-hydroxyapatite rods acts as ligands targeting macrophage mannose receptors to promote their M2 polarization, improving the immunomicroenvironment and achieving bone regeneration. This approach has the advantage of easy preparation, specific regulation, and safety.
Collapse
Affiliation(s)
- Dan Qiao
- Nanjing Stomatological Hospital, Medical School of Nanjing University, 30 Zhongyang Road, Nanjing, Jiangsu 210008, People's Republic of China
| | - Shuyu Cheng
- Nanjing Stomatological Hospital, Medical School of Nanjing University, 30 Zhongyang Road, Nanjing, Jiangsu 210008, People's Republic of China
| | - Zhen Xing
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210093, People's Republic of China
| | - Qian Zhang
- Nanjing Stomatological Hospital, Medical School of Nanjing University, 30 Zhongyang Road, Nanjing, Jiangsu 210008, People's Republic of China
| | - Shiyuan Song
- Nanjing Stomatological Hospital, Medical School of Nanjing University, 30 Zhongyang Road, Nanjing, Jiangsu 210008, People's Republic of China
| | - Fuhua Yan
- Nanjing Stomatological Hospital, Medical School of Nanjing University, 30 Zhongyang Road, Nanjing, Jiangsu 210008, People's Republic of China.
| | - Yangheng Zhang
- Nanjing Stomatological Hospital, Medical School of Nanjing University, 30 Zhongyang Road, Nanjing, Jiangsu 210008, People's Republic of China.
| |
Collapse
|
2
|
Calcium Phosphate-Based Biomaterials for Bone Repair. J Funct Biomater 2022; 13:jfb13040187. [PMID: 36278657 PMCID: PMC9589993 DOI: 10.3390/jfb13040187] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/03/2022] [Accepted: 10/10/2022] [Indexed: 11/07/2022] Open
Abstract
Traumatic, tumoral, and infectious bone defects are common in clinics, and create a big burden on patient's families and society. Calcium phosphate (CaP)-based biomaterials have superior properties and have been widely used for bone defect repair, due to their similarities to the inorganic components of human bones. The biological performance of CaPs, as a determining factor for their applications, are dependent on their physicochemical properties. Hydroxyapatite (HAP) as the most thermally stable crystalline phase of CaP is mostly used in the form of ceramics or composites scaffolds with polymers. Nanostructured CaPs with large surface areas are suitable for drug/gene delivery systems. Additionally, CaP scaffolds with hierarchical nano-/microstructures have demonstrated excellent ability in promoting bone regeneration. This review focuses on the relationships and interactions between the physicochemical/biological properties of CaP biomaterials and their species, sizes, and morphologies in bone regeneration, including synthesis strategies, structure control, biological behavior, and the mechanisms of CaP in promoting osteogenesis. This review will be helpful for scientists and engineers to further understand CaP-based biomaterials (CaPs), and be useful in developing new high-performance biomaterials for bone repair.
Collapse
|
3
|
The Synthesis of Hydroxyapatite by Hydrothermal Process with Calcium Lactate Pentahydrate: The Effect of Reagent Concentrations, pH, Temperature, and Pressure. Bioinorg Chem Appl 2022; 2022:3481677. [PMID: 35371193 PMCID: PMC8975640 DOI: 10.1155/2022/3481677] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/07/2022] [Indexed: 12/21/2022] Open
Abstract
Hydroxyapatite and other calcium phosphates in the form of whiskers are lately widely considered as fillers for biocomposites due to their special biological and reinforcing properties. Depending on the method of synthesis, apatite whiskers of various sizes and phase composition can be obtained. In our work, hydroxyapatite (HAp) whiskers were successfully prepared in reaction between calcium lactate pentahydrate and orthophosphoric acid. The advantage of the proposed technique is the simple but precise control of the HAp crystal morphology and high product purity which is necessary for biomedical applications. The effect of reagent concentrations, pH, reaction temperature, and pressure on HAp whiskers' morphology and composition was investigated. In the result, we obtained hydroxyapatite of different morphology such as whiskers, hexagonal rods, and nanorods. The products were characterized by SEM, XRD, and FTIR. In this work, the synthesis of HAp whiskers by direct decomposition of calcium lactate pentahydrate chelates under hydrothermal conditions was showed for the first time.
Collapse
|
4
|
Petre DG, Leeuwenburgh SCG. The Use of Fibers in Bone Tissue Engineering. TISSUE ENGINEERING. PART B, REVIEWS 2022; 28:141-159. [PMID: 33375900 DOI: 10.1089/ten.teb.2020.0252] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Bone tissue engineering aims to restore and maintain the function of bone by means of biomaterial-based scaffolds. This review specifically focuses on the use of fibers in biomaterials used for bone tissue engineering as suitable environment for bone tissue repair and regeneration. We present a bioinspired rationale behind the use of fibers in bone tissue engineering and provide an overview of the most common fiber fabrication methods, including solution, melt, and microfluidic spinning. Subsequently, we provide a brief overview of the composition of fibers that are used in bone tissue engineering, including fibers composed of (i) natural polymers (e.g., cellulose, collagen, gelatin, alginate, chitosan, and silk, (ii) synthetic polymers (e.g., polylactic acid [PLA], polycaprolactone, polyglycolic acid [PGA], polyethylene glycol, and polymer blends of PLA and PGA), (iii) ceramic fibers (e.g., aluminium oxide, titanium oxide, and zinc oxide), (iv) metallic fibers (e.g., titanium and its alloys, copper and magnesium), and (v) composite fibers. In addition, we review the most relevant fiber modification strategies that are used to enhance the (bio)functionality of these fibers. Finally, we provide an overview of the applicability of fibers in biomaterials for bone tissue engineering, with a specific focus on mechanical, pharmaceutical, and biological properties of fiber-functionalized biomaterials for bone tissue engineering. Impact statement Natural bone is a complex composite material composed of an extracellular matrix of mineralized fibers containing living cells and bioactive molecules. Consequently, the use of fibers in biomaterial-based scaffolds offers a wide variety of opportunities to replicate the functional performance of bone. This review provides an overview of the use of fibers in biomaterials for bone tissue engineering, thereby contributing to the design of novel fiber-functionalized bone-substituting biomaterials of improved functionality regarding their mechanical, pharmaceutical, and biological properties.
Collapse
Affiliation(s)
- Daniela Geta Petre
- Department of Dentistry-Regenerative Biomaterials, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Sander C G Leeuwenburgh
- Department of Dentistry-Regenerative Biomaterials, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| |
Collapse
|
5
|
Development of Arabinoxylan-Reinforced Apple Pectin/Graphene Oxide/Nano-Hydroxyapatite Based Nanocomposite Scaffolds with Controlled Release of Drug for Bone Tissue Engineering: In-Vitro Evaluation of Biocompatibility and Cytotoxicity against MC3T3-E1. COATINGS 2020. [DOI: 10.3390/coatings10111120] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Fabrication of reinforced scaffolds to repair and regenerate defected bone is still a major challenge. Bone tissue engineering is an advanced medical strategy to restore or regenerate damaged bone. The excellent biocompatibility and osteogenesis behavior of porous scaffolds play a critical role in bone regeneration. In current studies, we synthesized polymeric nanocomposite material through free-radical polymerization to fabricate porous nanocomposite scaffolds by freeze drying. Functional group, surface morphology, porosity, pore size, and mechanical strength were examined through Fourier Transform Infrared Spectroscopy (FTIR), Single-Electron Microscopy (SEM), Brunauer-Emmet-Teller (BET), and Universal Testing Machine (UTM), respectively. These nanocomposites exhibit enhanced compressive strength (from 4.1 to 16.90 MPa), Young’s modulus (from 13.27 to 29.65 MPa) with well appropriate porosity and pore size (from 63.72 ± 1.9 to 45.75 ± 6.7 µm), and a foam-like morphology. The increasing amount of graphene oxide (GO) regulates the porosity and mechanical behavior of the nanocomposite scaffolds. The loading and sustained release of silver-sulfadiazine was observed to be 90.6% after 260 min. The in-vitro analysis was performed using mouse pre-osteoblast (MC3T3-E1) cell lines. The developed nanocomposite scaffolds exhibited excellent biocompatibility. Based on the results, we propose these novel nanocomposites can serve as potential future biomaterials to repair defected bone with the load-bearing application, and in bone tissue engineering.
Collapse
|
6
|
Antibacterial calcium phosphate composite cements reinforced with silver-doped magnesium phosphate (newberyite) micro-platelets. J Mech Behav Biomed Mater 2020; 110:103934. [DOI: 10.1016/j.jmbbm.2020.103934] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 06/04/2020] [Accepted: 06/13/2020] [Indexed: 11/23/2022]
|
7
|
Wang X, Peng X, Yue P, Qi H, Liu J, Li L, Guo C, Xie H, Zhou X, Yu X. A novel CPC composite cement reinforced by dopamine coated SCPP fibers with improved physicochemical and biological properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110544. [PMID: 32228928 DOI: 10.1016/j.msec.2019.110544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 11/13/2019] [Accepted: 12/11/2019] [Indexed: 02/05/2023]
Abstract
Traditional CPC cements have attracted wide attentions in repairing bone defects for injectability, easy plasticity and good osseointegration. However, its further application was limited by poor mechanical properties, long setting time and unsatisfactory biocompatibility. To solve these problems, polydopamine (DOPA) coated strontium-doped calcium polyphosphate (SCPP) fibers were added into CPC cements for the first time. A doping amount at fiber weight fraction of 0%, 1%, 2% and 5% was designed to develop a multifunctional composite fitting for bone tissues' regeneration and reconstruction and the optimum amount was selected through subsequent physicochemical and biological characterizations. The results implied DOPA coating successfully formed stable connections between SCPP fibers and CPC matrix, which simultaneously reinforced biomechanical strength and tenacity (5% SCPP/D/CPC samples exhibited more prominent mechanical property than others). In addition, 5% D/SCPP fibers doped composite cements were characterized as markedly-improved cytocompatibility: Sr2+ introduction induced cytoactive and significantly accelerated proliferation, attachment and spreading of osteoblasts. Besides, it also stimulated the secretion of OT, Col-I and ALP from seeded MG63, which was a critical character for further inducing osteogenic process, mineralization and bone tissues formation. The promoted cytocompatibility and improved osteogenesis-related growth factors' secretion could be attributed to constant and controllable release of Sr2+ and this deduction was approved by ICP analysis. In addition, Sr doping made this novel cement had a potential efficacy to inhibit aseptic loosening. In a word, present studies all demonstrated 5% SCPP/D/CPC composites could be a potential candidate material employed in bone regeneration and reconstruction for excellent mechanical property and cytocompatibility.
Collapse
Affiliation(s)
- Xu Wang
- Sichuan University, College of Polymer Science and Engineering, Chengdu, Sichuan province, 610065, PR China; Chengdu University of TCM, College of Acupuncture and Massage College,No. 37, Twelve Bridge Road, Chengdu,Sichuan province,610075,PR China
| | - Xu Peng
- Sichuan University, College of Polymer Science and Engineering, Chengdu, Sichuan province, 610065, PR China; Sichuan University,Laboratory animal center, No.24 South Section 1, Yihuan Road, Chengdu ,Sichuan province,610065, PR China
| | - Pengfei Yue
- West China Hospital of Sichuan University, Department of Biotherapy, Cancer Center, State Key Laboratory of Biotherapy, No.17 People's South Road,Chengdu,Sichuan province,610041, PR China
| | - Hao Qi
- Sichuan University, College of Polymer Science and Engineering, Chengdu, Sichuan province, 610065, PR China
| | - Jingwang Liu
- Sichuan University, College of Polymer Science and Engineering, Chengdu, Sichuan province, 610065, PR China
| | - Li Li
- The 452 Hospital of Chinese PLA, Department of Oncology, No.317 Jiuyanqiao shunjiang Road,Chengdu, Sichuan province, 610021, PR China
| | - Chengrui Guo
- Sichuan University, College of Polymer Science and Engineering, Chengdu, Sichuan province, 610065, PR China
| | - Huixu Xie
- West China Hospital of Sichuan University, Department of Head and neck oncology, No.17 People's South Road,Chengdu, Sichuan province, 610021, PR China
| | - Xiong Zhou
- Sichuan University, College of Polymer Science and Engineering, Chengdu, Sichuan province, 610065, PR China
| | - Xixun Yu
- Sichuan University, College of Polymer Science and Engineering, Chengdu, Sichuan province, 610065, PR China.
| |
Collapse
|
8
|
Bu S, Yan S, Wang R, Xia P, Zhang K, Li G, Yin J. In Situ Precipitation of Cluster and Acicular Hydroxyapatite onto Porous Poly(γ-benzyl-l-glutamate) Microcarriers for Bone Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12468-12477. [PMID: 32091198 DOI: 10.1021/acsami.9b22559] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Bone tissue engineering scaffold based on microcarriers provides an effective approach for the repair of irregular bone defects. The implantation of microcarriers by injection can reduce surgical trauma and fill various irregular shaped bone defects. Microcarriers with porous structure and osteogenic properties have shown great potential in promoting the repair of bone defects. In this study, two kinds of hydroxyapatite/poly-(γ-benzyl-l-glutamate) (HA/PBLG) microcarriers were constructed by emulsion/in situ precipitation method and their structures and properties were studied. First, PBLG porous microcarriers were prepared by an emulsion method. Surface carboxylation of PBLG microcarriers was performed to promote the deposition of HA on PBLG microcarriers. Next, the modified porous PBLG microcarriers were used as the matrix, combined with the in situ precipitation method; the cluster HA and acicular HA were precipitated onto the surface of porous microcarriers in the presence of ammonia water and tri(hydroxymethyl)aminomethane (Tris) solution, respectively. The micromorphology, composition, and element distribution of the two kinds of microcarriers were characterized by TEM, SEM, and AFM. Adipose stem cells (ADSCs) were cultured on the cluster HA/PBLG and acicular HA/PBLG microcarriers, respectively. ADSCs could grow and proliferate normally on both kinds of microcarriers wherein the acicular HA/PBLG microcarriers were more favorable for early cell adhesion and showed a beneficial effect on mineralization and osteogenic differentiation of ADSCs. Successful healing of a rabbit femur defect verified the bone regeneration ability of acicular HA/PBLG microcarriers.
Collapse
Affiliation(s)
- Shuai Bu
- Department of Polymer Materials, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China
| | - Shifeng Yan
- Department of Polymer Materials, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China
| | - Ruanfeng Wang
- Department of Polymer Materials, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China
| | - Pengfei Xia
- Department of Polymer Materials, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China
| | - Kunxi Zhang
- Department of Polymer Materials, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China
| | - Guifei Li
- Department of Polymer Materials, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China
| | - Jingbo Yin
- Department of Polymer Materials, Shanghai University, 99 Shangda Road, Shanghai 200444, People's Republic of China
| |
Collapse
|
9
|
Li TT, Ling L, Lin MC, Jiang Q, Lin Q, Lou CW, Lin JH. Effects of ultrasonic treatment and current density on the properties of hydroxyapatite coating via electrodeposition and its in vitro biomineralization behavior. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110062. [DOI: 10.1016/j.msec.2019.110062] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 07/29/2019] [Accepted: 08/07/2019] [Indexed: 12/13/2022]
|
10
|
Pinto KNZ, Tim CR, Crovace MC, Rossi BRO, Kido HW, Parizotto NA, Zanotto ED, Peitl O, Rennó AC. Scaffolds of bioactive glass-ceramic (Biosilicate®) and bone healing: A biological evaluation in an experimental model of tibial bone defect in rats. Biomed Mater Eng 2018; 29:665-683. [PMID: 30400079 DOI: 10.3233/bme-181016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This study aimed to investigate the in vivo tissue response of the Biosilicate® scaffolds in a model of tibial bone defect. Sixty male Wistar rats were distributed into bone defect control group (CG) and Biosilicate® scaffold group (BG). Animals were euthanized 15, 30 and 45 days post-surgery. Stereomicroscopy, scanning electron microscopy, histopathological, immunohistochemistry and biomechanical analysis were used. Scaffolds had a total porosity of 44%, macroporosity of 15% with pore diameter of 230 μm. Higher amount of newly formed bone was observed on days 30 and 45 in BG. Immunohistochemistry analysis showed that the COX-2 expression was significantly higher on days 15 and 30 in BG compared with the CG. RUNX-2 immunoexpression was significantly higher in BG on days 15 and 45. No statistically significant difference was observed in RANKL immunoexpression in all experimental groups. BMP-9 immunoexpression was significantly upregulated in the BG on day 45. Biomechanical analysis showed a decrease in the biomechanical properties of the bone callus on days 30 and 45. The implantation of the Biosilicate® scaffolds was effective in stimulating newly bone formation and produced an increased immunoexpression of markers related to the bone repair.
Collapse
Affiliation(s)
| | - Carla Roberta Tim
- Technological and Scientific Institute, Brazil University (UnBr), São Paulo, SP, Brazil.,Department of Bioscience, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - Murilo Camuri Crovace
- Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | | | - Hueliton Wilian Kido
- Department of Bioscience, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil.,Nove de Julho University (UNINOVE), Bauru, Brazil
| | - Nivaldo Antonio Parizotto
- Technological and Scientific Institute, Brazil University (UnBr), São Paulo, SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Oscar Peitl
- Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Ana Claudia Rennó
- Department of Bioscience, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| |
Collapse
|
11
|
Jing L, Chen L, Peng H, Ji M, Xiong Y, Lv G. Employing the cyclophosphate to accelerate the degradation of nano-hydroxyapatite/poly(amino acid) (n-HA/PAA) composite materials. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:2154-2170. [PMID: 28950766 DOI: 10.1080/09205063.2017.1386030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Owing to the good degradability and biocompatibility of polyphosphoesters (PPEs), the aim of the current study was to investigate a novel degradable composite of nano-hydroxyapatite/poly(amino acid) (n-HA/PAA) with cyclophosphate (CPE) via in situ melting polymerization to improve the degradation of n-HA/PAA. The structure of each composite was characterized via Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The degradation properties were studied in terms of the weight loss and pH in a phosphate-buffered saline (PBS) solution, while the surface morphology was examined using a scanning electron microscope-energy dispersive spectrometer (SEM-EDS) after soaking the surface in simulated body fluid (SBF). The cell proliferation, cell adhesion, and alkaline phosphatase (ALP) activity were used for the analysis of cytocompatibility. The weight loss results showed that the n-HA/PAA composite was 9.98 wt%, weighed after soaking in the PBS solution for 12 weeks, whereas the nano-hydroxyapatite/polyphosphoester-amino acid (n-HA/PPE-AA) composite was 46.94 wt%. The pH of the composites was in a suitable range between 6.64 to 7.06 and finally stabilized at 7.39. The SEM and EDS results revealed the formation of an apatite-like layer on the surface of the n-HA/PPE-AA composites after soaking in SBF for one week. The cell counting Kit 8 (CCK-8) assay of the cell culture in the leaching liquid of the n-HA/PPE-AA composites exhibited non-cytotoxicity and high-proliferation, and the cell adhesion showed the well spreading and normal phenotype extension of the cells on the n-HA/PPE-AA composites surface. Concurrently, the co-culture results of the composites and cells confirmed that the n-HA/PPE-AA composites exhibited a higher ALP activity. In summary, the results demonstrated that the n-HA/PPE-AA composites had a controllable degradation property, good bioactivity, and cytocompatibility.
Collapse
Affiliation(s)
- Linjing Jing
- a College of Physical Science and Technology , Sichuan University , Chengdu , China
| | - Li Chen
- a College of Physical Science and Technology , Sichuan University , Chengdu , China
| | - Haitao Peng
- a College of Physical Science and Technology , Sichuan University , Chengdu , China
| | - Mizhi Ji
- a College of Physical Science and Technology , Sichuan University , Chengdu , China
| | - Yi Xiong
- a College of Physical Science and Technology , Sichuan University , Chengdu , China
| | - Guoyu Lv
- a College of Physical Science and Technology , Sichuan University , Chengdu , China
| |
Collapse
|
12
|
Mao D, Li Q, Bai N, Dong H, Li D. Porous stable poly(lactic acid)/ethyl cellulose/hydroxyapatite composite scaffolds prepared by a combined method for bone regeneration. Carbohydr Polym 2017; 180:104-111. [PMID: 29103485 DOI: 10.1016/j.carbpol.2017.10.031] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/04/2017] [Accepted: 10/06/2017] [Indexed: 01/13/2023]
Abstract
A major challenge in bone tissue engineering is the development of biomimetic scaffolds which should simultaneously meet mechanical strength and pore structure requirements. Herein, we combined technologies of high concentration solvent casting, particulate leaching, and room temperature compression molding to prepare a novel poly(lactic acid)/ethyl cellulose/hydroxyapatite (PLA/EC/HA) scaffold. The functional, structural and mechanical properties of the obtained porous scaffolds were characterized. The results indicated that the PLA/EC/HA scaffolds at the 20wt% HA loading level showed optimal mechanical properties and desired porous structure. Its porosity, contact angle, compressive yield strength and weight loss after 56days were 84.28±7.04%, 45.13±2.40°, 1.57±0.09MPa and 4.77±0.32%, respectively, which could satisfy the physiological demands to guide bone regeneration. Thus, the developed scaffolds have potential to be used as a bone substitute material for bone tissue engineering application.
Collapse
Affiliation(s)
- Daoyong Mao
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Qing Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Ningning Bai
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Hongzhou Dong
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Daikun Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| |
Collapse
|
13
|
Schamel M, Barralet JE, Gelinsky M, Groll J, Gbureck U. Intrinsic 3D Prestressing: A New Route for Increasing Strength and Improving Toughness of Hybrid Inorganic Biocements. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1701035. [PMID: 28714141 DOI: 10.1002/adma.201701035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/22/2017] [Indexed: 06/07/2023]
Abstract
Cement is the most consumed resource and is the most widely used material globally. The ability to extrinsically prestress cementitious materials with tendons usually made from steel allows the creation of high-strength bridges and floors from this otherwise brittle material. Here, a dual setting cement system based on the combination of hydraulic cement powder with an aqueous silk fibroin solution that intrinsically generates a 3D prestressing during setting, dramatically toughening the cement to the point it can be cut with scissors, is reported. Changes of both ionic concentration and pH during cement setting are shown to create an interpenetrating silk fibroin inorganic composite with the combined properties of the elastic polymer and the rigid cement. These hybrid cements are self-densifying and show typical ductile fracture behavior when dry and a high elasticity under wet conditions with mechanical properties (bending and compressive strength) nearly an order of magnitude higher than the fibroin-free cement reference.
Collapse
Affiliation(s)
- Martha Schamel
- Department of Functional Materials in Medicine and Dentistry, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Jake E Barralet
- Department of Surgery, Faculty of Medicine, Faculty of Dentistry, McGill University, 1650 Cedar Ave., Montréal, Québec, H3G 1A4, Canada
| | - Michael Gelinsky
- Centre for Translational Bone, Joint and Soft Tissue Research, Technische Universität Dresden, Fetscherstr. 74, Dresden, 01307, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| | - Uwe Gbureck
- Department of Functional Materials in Medicine and Dentistry, University Hospital of Würzburg, Pleicherwall 2, Würzburg, 97070, Germany
| |
Collapse
|
14
|
Echazú MIA, Tuttolomondo MV, Foglia ML, Mebert AM, Alvarez GS, Desimone MF. Advances in collagen, chitosan and silica biomaterials for oral tissue regeneration: from basics to clinical trials. J Mater Chem B 2016; 4:6913-6929. [DOI: 10.1039/c6tb02108e] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Different materials have distinct surface and bulk characteristics; each of them potentially useful for the treatment of a particular wound or disease.
Collapse
Affiliation(s)
- Maria Inés Alvarez Echazú
- Universidad de Buenos Aires
- Instituto de Química y Metabolismo del Fármaco (IQUIMEFA)
- Facultad de Farmacia y Bioquímica
- Ciudad Autónoma de Buenos Aires
- Argentina
| | - Maria Victoria Tuttolomondo
- Universidad de Buenos Aires
- Instituto de Química y Metabolismo del Fármaco (IQUIMEFA)
- Facultad de Farmacia y Bioquímica
- Ciudad Autónoma de Buenos Aires
- Argentina
| | - Maria Lucia Foglia
- Universidad de Buenos Aires
- Instituto de Química y Metabolismo del Fármaco (IQUIMEFA)
- Facultad de Farmacia y Bioquímica
- Ciudad Autónoma de Buenos Aires
- Argentina
| | - Andrea Mathilde Mebert
- Universidad de Buenos Aires
- Instituto de Química y Metabolismo del Fármaco (IQUIMEFA)
- Facultad de Farmacia y Bioquímica
- Ciudad Autónoma de Buenos Aires
- Argentina
| | - Gisela Solange Alvarez
- Universidad de Buenos Aires
- Instituto de Química y Metabolismo del Fármaco (IQUIMEFA)
- Facultad de Farmacia y Bioquímica
- Ciudad Autónoma de Buenos Aires
- Argentina
| | - Martin Federico Desimone
- Universidad de Buenos Aires
- Instituto de Química y Metabolismo del Fármaco (IQUIMEFA)
- Facultad de Farmacia y Bioquímica
- Ciudad Autónoma de Buenos Aires
- Argentina
| |
Collapse
|
15
|
Biswas S, Vinnakota S, Roy S. Soft-matter led hardening of concrete: enhancement of compressive and thermal strength of concrete by polymers and nanoparticles. RSC Adv 2016. [DOI: 10.1039/c5ra24834e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Supramolecularly bound polyacrylic acid & urea based scaffolds & nanoparticles in form of defects improve strength and thermal resistivity of concrete.
Collapse
Affiliation(s)
- Subharanjan Biswas
- Eco-Friendly Applied Materials Laboratory (EFAML)
- Materials Science Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research-Kolkata (IISER-Kolkata)
- Mohanpur-741246
| | - Sumanjani Vinnakota
- Eco-Friendly Applied Materials Laboratory (EFAML)
- Materials Science Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research-Kolkata (IISER-Kolkata)
- Mohanpur-741246
| | - Soumyajit Roy
- Eco-Friendly Applied Materials Laboratory (EFAML)
- Materials Science Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research-Kolkata (IISER-Kolkata)
- Mohanpur-741246
| |
Collapse
|
16
|
Liu J, Li L, Yang X, Huang C, Guo C, Gu Z, Yu X. Reinforcement of a new calcium phosphate cement with dopamine-mediated strontium-doped calcium polyphosphate-modified polycaprolactone fibers. RSC Adv 2016. [DOI: 10.1039/c6ra19698e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To improve the performance of calcium phosphate cement, dopamine/PCL fibers and strontium-doped calcium polyphosphate/D/PCL fibers were respectively incorporated into Sr-containing calcium phosphate cement to develop a novel bone cement.
Collapse
Affiliation(s)
- Jingwang Liu
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Li Li
- Department of Oncology
- Chengdu
- P. R. China
| | - Xu Yang
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - ChengCheng Huang
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Chengrui Guo
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Zhipeng Gu
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
- Department of Biomedical Engineering
| | - Xixun Yu
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| |
Collapse
|
17
|
Wu Y, Tang X, Chen J, Tang T, Guo H, Tang S, Zhao L, Ma X, Hong H, Wei J. Improvement of bioactivity, degradability, and cytocompatibility of biocement by addition of mesoporous magnesium silicate into sodium-magnesium phosphate cement. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:238. [PMID: 26395363 DOI: 10.1007/s10856-015-5579-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 09/18/2015] [Indexed: 06/05/2023]
Abstract
A novel mesoporous magnesium-based cement (MBC) was fabricated by using the mixed powders of magnesium oxide, sodium dihydrogen phosphate, and mesoporous magnesium silicate (m-MS). The results indicate that the setting time and water absorption of the MBC increased as a function of increasing m-MS content, while compressive strength decreased. In addition, the degradability of the MBC in a solution of Tris-HCl and the ability of apatite formation on the MBC were significantly improved with the increase in m-MS content. In cell culture experiments, the results show that the attachment, proliferation, and alkaline phosphatase activity of the MC3T3-E1 cells on the MBC were significantly enhanced with the increase of the content of m-MS. It can be suggested that the MBC with good cytocompatibility could promote the proliferation and differentiation of the MC3T3-E1 cells. In short, our findings indicate that the MBC containing m-MS had promising potential as a new biocement for bone regeneration and repair applications.
Collapse
Affiliation(s)
- Yingyang Wu
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
| | - Xiaofeng Tang
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Jie Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Tingting Tang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, People's Republic of China
| | - Han Guo
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, People's Republic of China
| | - Songchao Tang
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Liming Zhao
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, People's Republic of China
| | - Xuhui Ma
- Polymer Science (Shenzhen) New Materials Co., Ltd., Shenzhen, 518101, People's Republic of China
| | - Hua Hong
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
| |
Collapse
|
18
|
Liu H, Guan Y, Wei D, Gao C, Yang H, Yang L. Reinforcement of injectable calcium phosphate cement by gelatinized starches. J Biomed Mater Res B Appl Biomater 2015; 104:615-25. [PMID: 25953516 DOI: 10.1002/jbm.b.33434] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 03/23/2015] [Accepted: 04/14/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Huiling Liu
- Department of Orthopaedics; Orthopaedic Institute, The First Affiliated Hospital, Soochow University; Suzhou Jiangsu 215006 People's Republic of China
| | - Ying Guan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University; Suzhou Jiangsu 215123 People's Republic of China
| | - Donglei Wei
- Department of Orthopaedics; Orthopaedic Institute, The First Affiliated Hospital, Soochow University; Suzhou Jiangsu 215006 People's Republic of China
| | - Chunxia Gao
- Department of Orthopaedics; Orthopaedic Institute, The First Affiliated Hospital, Soochow University; Suzhou Jiangsu 215006 People's Republic of China
| | - Huilin Yang
- Department of Orthopaedics; Orthopaedic Institute, The First Affiliated Hospital, Soochow University; Suzhou Jiangsu 215006 People's Republic of China
| | - Lei Yang
- Department of Orthopaedics; Orthopaedic Institute, The First Affiliated Hospital, Soochow University; Suzhou Jiangsu 215006 People's Republic of China
- The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| |
Collapse
|
19
|
Perez RA, Shin SH, Han CM, Kim HW. Bioactive injectables based on calcium phosphates for hard tissues: A recent update. Tissue Eng Regen Med 2015. [DOI: 10.1007/s13770-015-0096-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
|
20
|
Dual-setting brushite-silica gel cements. Acta Biomater 2015; 11:467-76. [PMID: 25263032 DOI: 10.1016/j.actbio.2014.09.036] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/19/2014] [Accepted: 09/21/2014] [Indexed: 11/21/2022]
Abstract
The current study describes a dual-mechanism-setting cement that combines a brushite-forming cement paste with a second inorganic silica-based precursor. Materials were obtained by pre-hydrolyzing tetraethyl orthosilicate (TEOS) under acidic conditions following the addition of a calcium phosphate cement (CPC) powder mixed of β-tricalcium phosphate and monocalcium phosphate. Cement setting occurred by a dissolution-precipitation process, while changes in pH during setting simultaneously initiated the condensation reaction of the hydrolyzed TEOS. This resulted in an interpenetrating phase composite material in which the macropores of the CPC were infiltrated by the microporous silica gel, leading to a higher density and a compressive strength ∼5-10 times higher than the CPC reference. This also altered the release of vancomycin as a model drug, whereby in contrast to the quantitative release from the CPC reference, 25% of the immobilized drug remained in the composite matrix. By varying the TEOS content in the composite, the cement phase composition could be controlled to form either brushite, anhydrous monetite or a biphasic mixture of both. The composites with the highest silicate content showed a cell proliferation similar to a hydroxyapatite reference with a significantly higher activity per cell. Surprisingly, the biological response did not seem to be attributed to the released silicate ions, but to the release of phosphate and the adsorption of magnesium ions from the cell culture medium.
Collapse
|
21
|
Lin K, Wu C, Chang J. Advances in synthesis of calcium phosphate crystals with controlled size and shape. Acta Biomater 2014; 10:4071-102. [PMID: 24954909 DOI: 10.1016/j.actbio.2014.06.017] [Citation(s) in RCA: 196] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 06/06/2014] [Accepted: 06/11/2014] [Indexed: 01/02/2023]
Abstract
Calcium phosphate (CaP) materials have a wide range of applications, including biomaterials, adsorbents, chemical engineering materials, catalysts and catalyst supports and mechanical reinforcements. The size and shape of CaP crystals and aggregates play critical roles in their applications. The main inorganic building blocks of human bones and teeth are nanocrystalline CaPs; recently, much progress has been made in the application of CaP nanocrystals and their composites for clinical repair of damaged bone and tooth. For example, CaPs with special micro- and nanostructures can better imitate the biomimetic features of human bone and tooth, and this offers significantly enhanced biological performances. Therefore, the design of CaP nano-/microcrystals, and the shape and hierarchical structures of CaPs, have great potential to revolutionize the field of hard tissue engineering, starting from bone/tooth repair and augmentation to controlled drug delivery devices. Previously, a number of reviews have reported the synthesis and properties of CaP materials, especially for hydroxyapatite (HAp). However, most of them mainly focused on the characterizations and physicochemical and biological properties of HAp particles. There are few reviews about the control of particle size and size distribution of CaPs, and in particular the control of nano-/microstructures on bulk CaP ceramic surfaces, which is a big challenge technically and may have great potential in tissue engineering applications. This review summarizes the current state of the art for the synthesis of CaP crystals with controlled sizes from the nano- to the macroscale, and the diverse shapes including the zero-dimensional shapes of particles and spheres, the one-dimensional shapes of rods, fibers, wires and whiskers, the two-dimensional shapes of sheets, disks, plates, belts, ribbons and flakes and the three-dimensional (3-D) shapes of porous, hollow, and biomimetic structures similar to biological bone and tooth. In addition, this review will also summarize studies on the controlled formation of nano-/microstructures on the surface of bulk ceramics, and the preparation of macroscopical bone grafts with 3-D architecture nano-/microstructured surfaces. Moreover, the possible directions of future research and development in this field, such as the detailed mechanisms behind the size and shape control in various strategies, the importance of theoretical simulation, self-assembly, biomineralization and sacrificial precursor strategies in the fabrication of biomimetic bone-like and enamel-like CaP materials are proposed.
Collapse
Affiliation(s)
- Kaili Lin
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China.
| | - Chengtie Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Jiang Chang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China.
| |
Collapse
|
22
|
Kido HW, Ribeiro DA, de Oliveira P, Parizotto NA, Camilo CC, Fortulan CA, Marcantonio E, da Silva VHP, Renno ACM. Biocompatibility of a porous alumina ceramic scaffold coated with hydroxyapatite and bioglass. J Biomed Mater Res A 2013; 102:2072-8. [PMID: 23894045 DOI: 10.1002/jbm.a.34877] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 06/21/2013] [Accepted: 07/12/2013] [Indexed: 11/08/2022]
Abstract
This study aimed to evaluate the osteointegration and genotoxic potential of a bioactive scaffold, composed of alumina and coated with hydroxyapatite and bioglass, after their implantation in tibias of rats. For this purpose, Wistar rats underwent surgery to induce a tibial bone defect, which was filled with the bioactive scaffolds. Histology analysis (descriptive and morphometry) of the bone tissue and the single-cell gel assay (comet) in multiple organs (blood, liver, and kidney) were used to reach this aim after a period of 30, 60, 90, and 180 days of material implantation. The main findings showed that the incorporation of hydroxyapatite and bioglass in the alumina scaffolds produced a suitable environment for bone ingrowth in the tibial defects and did not demonstrate any genotoxicity in the organs evaluated in all experimental periods. These results clearly indicate that the bioactive scaffolds used in this study present osteogenic potential and still exhibit local and systemic biocompatibility. These findings are promising once they convey important information about the behavior of this novel biomaterial in biological system and highlight its possible clinical application.
Collapse
Affiliation(s)
- Hueliton Wilian Kido
- Department of Physiotherapy, Post-Graduate Program of Biotechnology, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Renno ACM, Nejadnik MR, van de Watering FCJ, Crovace MC, Zanotto ED, Hoefnagels JPM, Wolke JGC, Jansen JA, van den Beucken JJJP. Incorporation of bioactive glass in calcium phosphate cement: Material characterization andin vitrodegradation. J Biomed Mater Res A 2013; 101:2365-73. [DOI: 10.1002/jbm.a.34531] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 11/05/2012] [Accepted: 11/05/2012] [Indexed: 01/12/2023]
|
24
|
Fiber reinforced calcium phosphate cements – On the way to degradable load bearing bone substitutes? Biomaterials 2012; 33:5887-900. [DOI: 10.1016/j.biomaterials.2012.04.053] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 04/23/2012] [Indexed: 11/22/2022]
|
25
|
Costa DO, Dixon SJ, Rizkalla AS. One- and three-dimensional growth of hydroxyapatite nanowires during sol-gel-hydrothermal synthesis. ACS APPLIED MATERIALS & INTERFACES 2012; 4:1490-1499. [PMID: 22296410 DOI: 10.1021/am201735k] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nanoscale hydroxyapatite (HA) is an optimal candidate biomaterial for bone tissue engineering because of its bioactive and osteoconductive properties. In this study, micro- and nanoscale HA particles with rod- and wirelike morphology were synthesized by a novel sol-gel-hydrothermal process. Sol-gel chemistry was used to produce a dry gel containing amorphous calcium phosphate (ACP), which was used as a precursor material in a hydrothermal process. The sol-gel-hydrothermal products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) to determine particle morphology, crystal structure, and the presence of chemical functional groups. A pure HA crystal was synthesized, which underwent both one- and three-dimensional growth, resulting in tunable microrod and nanorod, and wire morphologies. The effects of solution pH and reaction time on particle diameter and length were assessed. Particle diameter ranged from 25 to 800 nm and decreased with an increase in solution pH, whereas both particle length and diameter increased as the hydrothermal process was prolonged. Nanowire HA powders (10-50 wt %) were mixed with poly(ε-caprolactone) (PCL) to produce PCL/HA composites. Fracture surfaces of PCL/HA composites showed a well-dispersed and homogeneous distribution of HA nanowires within the PCL matrix. Mechanical testing revealed a significant (p < 0.05) increase in the Young's and compressive moduli of PCL/HA composites compared to PCL alone, with 50 wt % HA producing a 3-fold increase in Young's modulus from 193 to 665 MPa and 2-fold increase in compressive modulus from 230 to 487 MPa. These HA nanowires can be used to reinforce polymer composites and are excellent biomaterials for tissue engineering of bone.
Collapse
Affiliation(s)
- Daniel O Costa
- Department of Chemical and Biochemical Engineering, Faculty of Engineering, The University of Western Ontario, London, Ontario, Canada N6A 5B9
| | | | | |
Collapse
|