1
|
Milovanovic S, Pajnik J, Lukic I. Tailoring of advanced poly(lactic acid)‐based materials: A review. J Appl Polym Sci 2022. [DOI: 10.1002/app.51839] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Stoja Milovanovic
- University of Belgrade Faculty of Technology and Metallurgy Belgrade Serbia
- New Chemical Syntheses Institute Łukasiewicz Research Network Puławy Poland
| | - Jelena Pajnik
- University of Belgrade Innovation Center of the Faculty of Technology and Metallurgy Belgrade Serbia
| | - Ivana Lukic
- University of Belgrade Faculty of Technology and Metallurgy Belgrade Serbia
| |
Collapse
|
2
|
Sun X, Liu Y, Wei Y, Wang Y. Chirality-induced bionic scaffolds in bone defects repair-a review. Macromol Biosci 2022; 22:e2100502. [PMID: 35246939 DOI: 10.1002/mabi.202100502] [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: 12/09/2021] [Revised: 01/27/2022] [Indexed: 11/12/2022]
Abstract
Due to lack of amino sugar with aging, people will suffer from various epidemic bone diseases called "undead cancer" by the World Health Organization. The key problem in bone tissue engineering that has not been completely resolved is the repair of critical large-scale bone and cartilage defects. The chirality of the extracellular matrix plays a decisive role in the physiological activity of bone cells and the occurrence of bone tissue, but the mechanism of chirality in regulating cell adhesion and growth is still in the early stage of exploration. This paper reviews the application progress of chirality-induced bionic scaffolds in bone defects repair based on "soft" and "hard" scaffolds. The aim is to summarize the effects of different chiral structures (L-shaped and D-shaped) in the process of inducing bionic scaffolds in bone defects repair. In addition, many technologies and methods as well as issues worthy of special consideration for preparing chirality-induced bionic scaffolds are also introduced. We expect that this work can provide inspiring ideas for designing new chirality-induced bionic scaffolds and promote the development of chirality in bone tissue engineering. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Xinyue Sun
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 300354, P. R. China
| | - Yue Liu
- Department of Spinal Surgery, Tianjin Hospital, Tianjin, 300211, P. R. China
| | - Yuping Wei
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 300354, P. R. China
| | - Yong Wang
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 300354, P. R. China
| |
Collapse
|
3
|
High-Strength GO/PA66 Nanocomposite Fibers via In Situ Precipitation and Polymerization. Polymers (Basel) 2021; 13:polym13111688. [PMID: 34067259 PMCID: PMC8196895 DOI: 10.3390/polym13111688] [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: 05/08/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 12/27/2022] Open
Abstract
The uniform dispersion of graphene oxide (GO) and strong interfacial bonding are the key factors in achieving the high mechanical strength of GO/polymer composites. It is still challenging to prepare GO/PA66 composites with uniform GO dispersion by the in situ polymerization method. In this paper, we prepare GO/PA66 salt nanocomposite by in situ precipitating PA66 salt with GO in ethanol. The GO/PA66 nanocomposite fibers are then fabricated using the as-prepared GO/PA66 salt by in situ polymerizing and melt spinning. By tuning the GO content, the tensile strength and Young's modulus of the GO/PA66 fibers are increased from 265 ± 18 to 710 ± 14 MPa (containing 0.3 wt% GO) and from 1.1 ± 0.08 to 3.8 ± 0.19 GPa (containing 0.5 wt% GO), respectively. The remarkable improvements are attributed to the uniform dispersion of GO in the GO/PA66 salt nanocomposite via ionic bonding and hydrogen bonding in the in situ precipitation process, and the covalent interfacial bonding between the GO and PA66 during the in situ polymerization process. This work sheds light on the easy fabrication of high-performance PA66-based nanocomposites.
Collapse
|
4
|
Biomimetic Aspects of Oral and Dentofacial Regeneration. Biomimetics (Basel) 2020; 5:biomimetics5040051. [PMID: 33053903 PMCID: PMC7709662 DOI: 10.3390/biomimetics5040051] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 12/12/2022] Open
Abstract
Biomimetic materials for hard and soft tissues have advanced in the fields of tissue engineering and regenerative medicine in dentistry. To examine these recent advances, we searched Medline (OVID) with the key terms “biomimetics”, “biomaterials”, and “biomimicry” combined with MeSH terms for “dentistry” and limited the date of publication between 2010–2020. Over 500 articles were obtained under clinical trials, randomized clinical trials, metanalysis, and systematic reviews developed in the past 10 years in three major areas of dentistry: restorative, orofacial surgery, and periodontics. Clinical studies and systematic reviews along with hand-searched preclinical studies as potential therapies have been included. They support the proof-of-concept that novel treatments are in the pipeline towards ground-breaking clinical therapies for orofacial bone regeneration, tooth regeneration, repair of the oral mucosa, periodontal tissue engineering, and dental implants. Biomimicry enhances the clinical outcomes and calls for an interdisciplinary approach integrating medicine, bioengineering, biotechnology, and computational sciences to advance the current research to clinics. We conclude that dentistry has come a long way apropos of regenerative medicine; still, there are vast avenues to endeavour, seeking inspiration from other facets in biomedical research.
Collapse
|
5
|
Tuoya AD, Wang DX, Xing YS, Liu RJ, Hu YX, Zhang MD, Bai TY, Lv XL, Li J, Chang FH. Relationship between Methylation of FHIT and CDH13 Gene Promoter Region and Liver Cancer. Curr Med Sci 2020; 40:502-509. [PMID: 32474857 DOI: 10.1007/s11596-020-2202-4] [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: 09/09/2019] [Revised: 04/04/2020] [Indexed: 01/27/2023]
Abstract
In order to demonstrate the relationship between methylation of fragile histidine triad (FHIT) and T-cadherin/H-cadherin (CDH13) genes and liver cancer, the methylation status of FHIT and CDH13 was detected in healthy individuals and in Mongolian and Han patients with liver cancer. The phenol-chloroform method was used to extract genomic DNA. The methylation specific polymerase chain reaction method was applied to detect the methylation status of FHIT and CDH13. The relationship between smoking and alcohol consumption and gene (FHIT and CDH13) methylation was analyzed. There was significant difference in methylation rate of FHIT (72.67%, 34.67%) and CDH13 (72.0%, 28.0%) between liver cancer patients and healthy individuals of Mongolian descent (P<0.05), as well as that of FHIT (68%, 30.67%) and CDH13 (64%, 26%) between liver cancer patients and healthy individuals of Han individuals (P<0.05). There was also a relationship between smoking and drinking and the methylation of FHIT and CDH13 (P<0.05). Thus, the methylation of FHIT and CDH13 had a relationship with liver cancer incidence. Smoking and alcohol ingestion may promote the methylation of FHIT and CDH13.
Collapse
Affiliation(s)
- Ao-Dun Tuoya
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010010, China
| | - Dong-Xue Wang
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, 010010, China
| | - Yu-Shu Xing
- The Center for New Drug Safety Evaluation and Research of Inner Mongolia Medical University, Hohhot, 010010, China.,Inner Mongolia Research Center for Drug Screening, Hohhot, 010110, China
| | - Rui-Jun Liu
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, 010010, China
| | - Yu-Xia Hu
- The Center for New Drug Safety Evaluation and Research of Inner Mongolia Medical University, Hohhot, 010010, China.,Inner Mongolia Research Center for Drug Screening, Hohhot, 010110, China
| | - Meng-di Zhang
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, 010010, China.,Inner Mongolia Research Center for Drug Screening, Hohhot, 010110, China
| | - Tu-Ya Bai
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, 010010, China.,Inner Mongolia Research Center for Drug Screening, Hohhot, 010110, China
| | - Xiao-Li Lv
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, 010010, China.,Inner Mongolia Research Center for Drug Screening, Hohhot, 010110, China
| | - Jun Li
- Inner Mongolia Research Center for Drug Screening, Hohhot, 010110, China
| | - Fu-Hou Chang
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, 010010, China. .,The Center for New Drug Safety Evaluation and Research of Inner Mongolia Medical University, Hohhot, 010010, China. .,Inner Mongolia Research Center for Drug Screening, Hohhot, 010110, China.
| |
Collapse
|
6
|
Characterization of Mechanical and Micro-Architectural Properties of Porous Hydroxyapatite Bone Scaffold Using Green MicroAlgae as Binder. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/s13369-019-03877-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
7
|
Production of hydroxyapatite-bacterial nanocellulose scaffold with assist of cellulose nanocrystals. Carbohydr Polym 2019; 205:159-166. [DOI: 10.1016/j.carbpol.2018.10.034] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 09/25/2018] [Accepted: 10/11/2018] [Indexed: 12/22/2022]
|
8
|
Li G, Qin S, Liu X, Zhang D, He M. Structure and properties of nano-hydroxyapatite/poly(butylene succinate) porous scaffold for bone tissue engineering prepared by using ethanol as porogen. J Biomater Appl 2018; 33:776-791. [PMID: 30482129 DOI: 10.1177/0885328218812486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Biodegradable polymers, because their degradation products are small molecules that do not cause immune system rejection, have been increasingly used by researchers to explore the preparation of scaffold with excellent mechanical properties, biocompatibility and biodegradability. In this study, nano-hydroxyapatite and polybutylene succinate were mixed by solution-blending to prepare a porous scaffold that could be used in the biomedical industry. Based on the viewpoint of bionics, porous scaffold with well pore structure and uniform dispersion of nano-hydroxyapatite particles was prepared using ethanol as a porogen. When ethanol was used as a porogen to prepare the porous scaffold, the effects of different mass ratios of nano-hydroxyapatite and polybutylene succinate on the porosity and pore structure of the porous scaffold were investigated under the same amount of ethanol. The mercury intrusion tests showed that the porosity of the 30 nano-hydroxyapatite/polybutylene succinate porous scaffold was 38.987%. The experiment results of in vitro mineralization and cell culture showed that the porous scaffolds have good osteogenic capacity and cell compatibility, including attachment and proliferation. All experiment results indicated that ethanol can be used as a porogen to prepare nano-hydroxyapatite/polybutylene succinate porous scaffold, and it has great potential as a scaffold for bone tissue engineering.
Collapse
Affiliation(s)
- Gang Li
- College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang, China
- National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang, China
| | - Shuhao Qin
- College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang, China
- National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang, China
| | - Xiaonan Liu
- The Hospital Infection Management Section, The Affiliated Baiyun Hospital of Guizhou Medical University, Guiyang, China
| | - Daohai Zhang
- College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang, China
- National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang, China
| | - Min He
- College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang, China
| |
Collapse
|
9
|
Poly(l-lactide)/cyclodextrin/citrate networks modified hydroxyapatite and its role as filler in the promotion to the properties of poly(l-lactide) biomaterials. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.04.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Nano-hydroxyapatite/collagen film as a favorable substrate to maintain the phenotype and promote the growth of chondrocytes cultured in vitro. Int J Mol Med 2018; 41:2150-2158. [PMID: 29393382 PMCID: PMC5810202 DOI: 10.3892/ijmm.2018.3431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 01/18/2018] [Indexed: 11/05/2022] Open
Abstract
Autologous chondrocyte implantation (ACI) has emerged as a novel approach to cartilage repair through the use of harvested chondrocytes. However, the expansion of the chondrocytes from the donor tissue in vitro is restricted by the limited cell numbers and the dedifferentiation of the chondrocytes. The present study investigated the effect of collagen-based films, including collagen, hydroxyapatite (HA)/collagen (HC) and in situ synthesis of nano‑HC (nHC), on monolayer cultures of chondrocytes. As a substrate for the chondrocytes monolayer culture in vitro, nHC was able to restrain the dedifferentiation of chondrocytes and facilitate cell expansion, which was detected by methyl thiazolyl tetrazolium assay, scanning electron microscopy, calcein‑acetoxymethyl/propidium iodide staining, hematoxylin and eosin staining, Safranin O staining, immunohistochemical staining and reverse transcription‑quantitative polymerase chain reaction. Furthermore, the nHC films significantly facilitated cell growth and enhanced the expression of cartilage‑specific extracellular matrix (ECM) components, including aggrecan and type II collagen. In addition, nHC films markedly downregulated the expression of collagen type I, an indicator of dedifferentiation. The results indicated that nHC, a collagen‑based substrate optimized by nanoparticles, was able to better support cell growth and preserve cell phenotype compared with collagen alone or HC. The nHC film, which favors cell growth and prevents the dedifferentiation of chondrocytes, may therefore serve as a useful cartilage‑like ECM for chondrocytes. In conclusion, nHC film is a promising substrate for the culture of chondrocytes in cell-based therapy.
Collapse
|
11
|
Cicciù M, Cervino G, Herford AS, Famà F, Bramanti E, Fiorillo L, Lauritano F, Sambataro S, Troiano G, Laino L. Facial Bone Reconstruction Using both Marine or Non-Marine Bone Substitutes: Evaluation of Current Outcomes in a Systematic Literature Review. Mar Drugs 2018; 16:E27. [PMID: 29342834 PMCID: PMC5793075 DOI: 10.3390/md16010027] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/12/2017] [Accepted: 12/22/2017] [Indexed: 12/25/2022] Open
Abstract
The aim of the present investigation was to systematically analyse the literature on the facial bone reconstruction defect using marine collagen or not and to evaluate a predictable treatment for their clinical management. The revision has been performed by searched MEDLINE and EMBASE databases from 2007 to 2017. Clinical trials and animal in vitro studies that had reported the application of bone substitutes or not for bone reconstruction defect and using marine collagen or other bone substitute material were recorded following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The first selection involved 1201 citations. After screening and evaluation of suitability, 39 articles were added at the revision process. Numerous discrepancies among the papers about bone defects morphology, surgical protocols, and selection of biomaterials were found. All selected manuscripts considered the final clinical success after the facial bone reconstruction applying bone substitutes. However, the scientific evidence regarding the vantage of the appliance of a biomaterial versus autologous bone still remains debated. Marine collagen seems to favor the dimensional stability of the graft and it could be an excellent carrier for growth factors.
Collapse
Affiliation(s)
- Marco Cicciù
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina of University, 98100 Messina, Italy.
| | - Gabriele Cervino
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina of University, 98100 Messina, Italy.
| | - Alan Scott Herford
- Department of Maxillofacial Surgery, Loma Linda University, Loma Linda, CA 92354, USA.
| | - Fausto Famà
- Department of Human Pathology, University of Messina, 98100 Messina, Italy.
| | - Ennio Bramanti
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina of University, 98100 Messina, Italy.
| | - Luca Fiorillo
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina of University, 98100 Messina, Italy.
| | - Floriana Lauritano
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina of University, 98100 Messina, Italy.
| | | | - Giuseppe Troiano
- Department of Clinical and Experimental Medicine, University of Foggia, 71121 Foggia, Italy.
| | - Luigi Laino
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialties, University of Campania "Luigi Vanvitelli", 80121 Naples, Italy.
| |
Collapse
|
12
|
Ye P, Yu B, Deng J, She RF, Huang WL. Application of silk fibroin/chitosan/nano-hydroxyapatite composite scaffold in the repair of rabbit radial bone defect. Exp Ther Med 2017; 14:5547-5553. [PMID: 29285090 DOI: 10.3892/etm.2017.5231] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 05/05/2017] [Indexed: 01/07/2023] Open
Abstract
Silk fibroin (SF), chitosan (CS) and nano-hydroxyapatite (nHA) possess excellent biocompatibility, thus, these were used to construct a SF/CS/nHA composite scaffold. Previously published results identified that this material exhibited satisfactory physical and chemical properties, and therefore qualified as a repair material in bone tissue engineering. The aim of the present study was to investigate the capacity and mechanism of this composite scaffold in repairing bone defects. In total, 45 New Zealand white rabbits were used to model defect in the right radial bone. A radial bone defect was induced, and rabbits were divided into the following treatment groups (n=15 in each): Group A, in which the SF/CS/nHA scaffold was implanted; group B, in which the SF/CS scaffold was implanted; and group C, in which rabbits did not receive subsequent treatment. X-ray scanning, specimen observation and histopathological examination were implemented at 1, 2, 3 and 4 months after modeling, in order to evaluate the osteogenic capacity and mechanism. At 1 month after modeling, the bone density shadow in the X-ray scan was darker in group A as compared with that in group B. Observation of the pathological specimens indicated that normal bone tissues partially replaced the scaffold. At 2 months, the bone density shadow of group A was similar to normal bone tissues, and normal tissue began to replace the scaffold. At 3-4 months after modeling, the X-ray scan and histopathological observation indicated that the normal bone tissues completely replaced the scaffold in group A, with an unobstructed marrow cavity. However, the bone mass of group B was lower in comparison with that of group A. The bone defect induced in group C was filled with fibrous connective tissues. Therefore, it was concluded that the SF/CS/nHA composite scaffold may be a promising material for bone tissue engineering.
Collapse
Affiliation(s)
- Peng Ye
- Department of Orthopaedics, Nanfang Hospital, First School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Bin Yu
- Department of Orthopaedic Trauma, The Southern Hospital Affiliated to Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Jiang Deng
- Department of Orthopaedics, The Third Hospital Affiliated to Zunyi Medical College, Zunyi, Guizhou 563000, P.R. China
| | - Rong-Feng She
- Department of Orthopaedics, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
| | - Wen-Liang Huang
- Department of Orthopaedics, The Third Hospital Affiliated to Zunyi Medical College, Guizhou, Zunyi 563000, P.R. China
| |
Collapse
|
13
|
Uth N, Mueller J, Smucker B, Yousefi AM. Validation of scaffold design optimization in bone tissue engineering: finite element modeling versus designed experiments. Biofabrication 2017; 9:015023. [DOI: 10.1088/1758-5090/9/1/015023] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
14
|
Yan W, Zhang CY, Xia LL, Zhang T, Fang QF. In vitro investigation of nanohydroxyapatite/poly(L-lactic acid) spindle composites used for bone tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:130. [PMID: 27379628 DOI: 10.1007/s10856-016-5738-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 06/14/2016] [Indexed: 06/06/2023]
Abstract
Calcium phosphate ceramics such as synthetic hydroxyapatite and tricalcium phosphate are widely used in the clinic, but they stimulate less bone regeneration. In this paper, nano-hydroxyapatite/poly(L-lactic acid) (nano-HA/PLLA) spindle composites with good mechanical performance were fabricated by a modified in situ precipitation method. The HA part of composite, distributing homogenously in PLLA matrix, is spindle shape with size of 10-30 nm in diameter and 60-100 nm in length. The molar ratio of Ca/P in the synthesized nano-HA spindles was deduced as 1.52 from the EDS spectra, which is close to the stoichiometric composition of HA (Ca/P & 1.67). The compress strength is up to 150 MPa when the HA content increase to 20 %. The in vitro tests indicate that HA/PLLA bio-composites have good biodegradability and bioactivity when immersed in simulated body fluid solutions. All the results suggested that HA/PLLA nano-biocomposites are appropriate to be applied as bone substitute in bone tissue engineering.
Collapse
Affiliation(s)
- W Yan
- School of Nursing, Anhui San Lian University, Hefei, 230601, China
| | - C Y Zhang
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei, China.
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China.
| | - L L Xia
- Armor Forces Department, Army Officer Academy of PLA, Hefei, China
| | - T Zhang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
| | - Q F Fang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
| |
Collapse
|
15
|
Zhang S, Yang Q, Zhao W, Qiao B, Cui H, Fan J, Li H, Tu X, Jiang D. In vitro and in vivo biocompatibility and osteogenesis of graphene-reinforced nanohydroxyapatite polyamide66 ternary biocomposite as orthopedic implant material. Int J Nanomedicine 2016; 11:3179-89. [PMID: 27471385 PMCID: PMC4948937 DOI: 10.2147/ijn.s105794] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Graphene and its derivatives have been receiving increasing attention regarding their application in bone tissue engineering because of their excellent characteristics, such as a vast specific surface area and excellent mechanical properties. In this study, graphene-reinforced nanohydroxyapatite/polyamide66 (nHA/PA66) bone screws were prepared. The results of scanning electron microscopy observation and X-ray diffraction data showed that both graphene and nHA had good dispersion in the PA66 matrix. In addition, the tensile strength and elastic modulus of the composites were significantly improved by 49.14% and 21.2%, respectively. The murine bone marrow mesenchymal stem cell line C3H10T1/2 exhibited better adhesion and proliferation in graphene reinforced nHA/PA66 composite material compared to the nHA/PA66 composites. The cells developed more pseudopods, with greater cell density and a more distinguishable cytoskeletal structure. These results were confirmed by fluorescent staining and cell viability assays. After C3H10T1/2 cells were cultured in osteogenic differentiation medium for 7 and 14 days, the bone differentiation-related gene expression, alkaline phosphatase, and osteocalcin were significantly increased in the cells cocultured with graphene reinforced nHA/PA66. This result demonstrated the bone-inducing characteristics of this composite material, a finding that was further supported by alizarin red staining results. In addition, graphene reinforced nHA/PA66 bone screws were implanted in canine femoral condyles, and postoperative histology revealed no obvious damage to the liver, spleen, kidneys, brain, or other major organs. The bone tissue around the implant grew well and was directly connected to the implant. The soft tissues showed no obvious inflammatory reaction, which demonstrated the good biocompatibility of the screws. These observations indicate that graphene-reinforced nHA/PA66 composites have great potential for application in bone tissue engineering.
Collapse
Affiliation(s)
- Shiyang Zhang
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University
| | - Qiming Yang
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University
| | - Weikang Zhao
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University
| | - Bo Qiao
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University
| | - Hongwang Cui
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University
| | - Jianjun Fan
- Molecular Medicine and Cancer Research Centre, Chongqing Medical University, Chongqing
| | - Hong Li
- College of Physical Science and Technology, Sichuan University, Chengdu
| | - Xiaolin Tu
- Institutes of Life Sciences, Chongqing Medical University, Chongqing, People’s Republic of China
| | - Dianming Jiang
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University
| |
Collapse
|
16
|
Heimbach B, Grassie K, Shaw MT, Olson JR, Wei M. Effect of hydroxyapatite concentration on high-modulus composite for biodegradable bone-fixation devices. J Biomed Mater Res B Appl Biomater 2016; 105:1963-1971. [PMID: 27300308 DOI: 10.1002/jbm.b.33713] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/27/2016] [Accepted: 05/01/2016] [Indexed: 11/06/2022]
Abstract
There are over 3 million bone fractures in the United States annually; over 30% of which require internal mechanical fixation devices to aid in the healing process. The current standard material used is a metal plate that is implanted onto the bone. However, metal fixation devices have many disadvantages, namely stress shielding and metal ion leaching. This study aims to fix these problems of metal implants by making a completely biodegradable material that will have a high modulus and exhibit great toughness. To accomplish this, long-fiber poly-l-lactic acid (PLLA) was utilized in combination with a matrix composed of polycaprolactone (PCL) and hydroxyapatite (HA) nano-rods. Through single fibril tensile tests, it was found that the PLLA fibers have a Young's modulus of 8.09 GPa. Synthesized HA nanorods have dimensions in the nanometer range with an aspect ratio over 6. By dip coating PLLA fibers in a suspension of PCL and HA and hot pressing the resulting coated fibers, dense fiber-reinforced samples were made having a flexural modulus up to 9.2 GPa and a flexural strength up to 187 MPa. The flexural modulus of cortical bone ranges from 7 to 25 GPa, so the modulus of the composite material falls into the range of bone. The typical flextural strength of bone is 130 MPa, and the samples here greatly exceed that with a strength of 187 MPa. After mechanical testing to failure the samples retained their shape, showing toughness with no catastrophic failure, indicating the possibility for use as a fixation material. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1963-1971, 2017.
Collapse
Affiliation(s)
- Bryant Heimbach
- Department of Biomedical Engineering, University of Connecticut, Connecticut
| | - Kevin Grassie
- Department of Biomedical Engineering, University of Connecticut, Connecticut
| | - Montgomery T Shaw
- Institute of Material Science (IMS), 97 North Eagleville Road, University of Connecticut, Storrs CT 06269-3136 Connecticut
| | - James R Olson
- Teleflex Medical, 1295 Main Street, Coventry, Connecticut, 06238
| | - Mei Wei
- Department of Biomedical Engineering, University of Connecticut, Connecticut.,Institute of Material Science (IMS), 97 North Eagleville Road, University of Connecticut, Storrs CT 06269-3136 Connecticut.,Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut, 06269
| |
Collapse
|
17
|
Wei CK, Ding SJ. Acid-resistant calcium silicate-based composite implants with high-strength as load-bearing bone graft substitutes and fracture fixation devices. J Mech Behav Biomed Mater 2016; 62:366-383. [PMID: 27254281 DOI: 10.1016/j.jmbbm.2016.05.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 05/12/2016] [Accepted: 05/15/2016] [Indexed: 12/11/2022]
Abstract
To achieve the excellent mechanical properties of biodegradable materials used for cortical bone graft substitutes and fracture fixation devices remains a challenge. To this end, the biomimetic calcium silicate/gelatin/chitosan oligosaccharide composite implants were developed, with an aim of achieving high strength, controlled degradation, and superior osteogenic activity. The work focused on the effect of gelatin on mechanical properties of the composites under four different kinds of mechanical stresses including compression, tensile, bending, and impact. The evaluation of in vitro degradability and fatigue at two simulated body fluid (SBF) of pH 7.4 and 5.0 was also performed, in which the pH 5.0 condition simulated clinical conditions caused by bacterial induced local metabolic acidosis or tissue inflammation. In addition, human mesenchymal stem cells (hMSCs) were sued to examine osteogenic activity. Experimental results showed that the appropriate amount of gelatin positively contributed to failure enhancement in compressive and impact modes. The 10wt% gelatin-containing composite exhibits the maximum value of the compressive strength (166.1MPa), which is within the reported compressive strength for cortical bone. The stability of the bone implants was apparently affected by the in vitro fatigue, but not by the initial pH environments (7.4 or 5.0). The gelatin not only greatly enhanced the degradation of the composite when soaked in the dynamic SBF solution, but effectively promoted attachment, proliferation, differentiation, and formation of mineralization of hMSCs. The 10wt%-gelatin composite with high initial strength may be a potential implant candidate for cortical bone repair and fracture fixation applications.
Collapse
Affiliation(s)
- Chung-Kai Wei
- Institute of Oral Science, Chung Shan Medical University, Taichung City 402, Taiwan
| | - Shinn-Jyh Ding
- Institute of Oral Science, Chung Shan Medical University, Taichung City 402, Taiwan; Department of Dentistry, Chung Shan Medical University Hospital, Taichung City 402, Taiwan.
| |
Collapse
|
18
|
Guarino V, Veronesi F, Marrese M, Giavaresi G, Ronca A, Sandri M, Tampieri A, Fini M, Ambrosio L. Needle-like ion-doped hydroxyapatite crystals influence osteogenic properties of PCL composite scaffolds. ACTA ACUST UNITED AC 2016; 11:015018. [PMID: 26928781 DOI: 10.1088/1748-6041/11/1/015018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Surface topography and chemistry both play a crucial role on influencing cell response in 3D porous scaffolds in terms of osteogenesis. Inorganic materials with peculiar morphology and chemical functionalities may be proficiently used to improve scaffold properties-in the bulk and along pore surface-promoting in vitro and in vivo osseous tissue in-growth. The present study is aimed at investigating how bone regenerative properties of composite scaffolds made of poly(Ɛ-caprolactone) (PCL) can be augmented by the peculiar properties of Mg(2+) ion doped hydroxyapatite (dHA) crystals, mainly emphasizing the role of crystal shape on cell activities mediated by microstructural properties. At the first stage, the study of mechanical response by crossing experimental compression tests and theoretical simulation via empirical models, allow recognizing a significant contribution of dHA shape factor on scaffold elastic moduli variation as a function of the relative volume fraction. Secondly, the peculiar needle-like shape of dHA crystals also influences microscopic (i.e. crystallinity, adhesion forces) and macroscopic (i.e. roughness) properties with relevant effects on biological response of the composite scaffold: differential scanning calorimetry (DSC) analyses clearly indicate a reduction of crystallization heat-from 66.75 to 43.05 J g(-1)-while atomic force microscopy (AFM) ones show a significant increase of roughness-from (78.15 ± 32.71) to (136.13 ± 63.21) nm-and of pull-off forces-from 33.7% to 48.7%. Accordingly, experimental studies with MG-63 osteoblast-like cells show a more efficient in vitro secretion of alkaline phosphatase (ALP) and collagen I and a more copious in vivo formation of new bone trabeculae, thus suggesting a relevant role of dHA to support the main mechanisms involved in bone regeneration.
Collapse
Affiliation(s)
- V Guarino
- Institute of Polymers, Composites and Biomaterials, Department of Chemical Sciences & Materials Technology National Research Council of Italy, Mostra D'Oltremare, Pad.20, V. le Kennedy 54, 80125, Naples, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Kumar A, Negi YS, Choudhary V, Bhardwaj NK. Fabrication of poly (vinyl alcohol)/ovalbumin/cellulose nanocrystals/nanohydroxyapatite based biocomposite scaffolds. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2015.1099102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
20
|
Peng W, Zheng W, Shi K, Wang W, Shao Y, Zhang D. An
in vivo
evaluation of PLLA/PLLA-gHA nano-composite for internal fixation of mandibular bone fractures. Biomed Mater 2015; 10:065007. [DOI: 10.1088/1748-6041/10/6/065007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
21
|
Abstract
In recent years, a significant achievement has been made in developing biomaterials, in particular the design of bioceramics, from natural sources for various biomedical applications. In this review, we discuss the fundamentals of structure, function and characteristics of human bone, its calcium and phosphate composition, role and importance of bioceramics for bone repairing or regeneration. This review also outlines various isolation techniques and the application of novel marine-derived hydroxyapatite (HA) and tri-calcium phosphate (TCP) for biocomposites engineering, and their potentials for bone substitute and bone regeneration.
Collapse
|
22
|
Zheng L, Jiang X, Chen X, Fan H, Zhang X. Evaluation of novel in situ synthesized nano-hydroxyapatite/collagen/alginate hydrogels for osteochondral tissue engineering. ACTA ACUST UNITED AC 2014; 9:065004. [PMID: 25358331 DOI: 10.1088/1748-6041/9/6/065004] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Collagen hydrogel has been widely used for osteochondral repair, but its mechanical properties cannot meet the requirements of clinical application. Previous studies have shown that the addition of either polysaccharide or inorganic particles could reinforce the polymer matrix. However, their synergic effects on collagen-based hydrogel have seldom been studied, and the potential application of triple-phased composite gel in osteochondral regeneration has not been reported. In this study, nano-hydroxyapatite (nano-HA) reinforced collagen-alginate hydrogel (nHCA) was prepared by the in situ synthesis of nano-HA in collagen gel followed by the addition of alginate and Ca(2+). The properties of triple-phased nHCA hydrogel were studied and compared with pure collagen and biphasic gels, and the triple-phased composite of collagen-alginate-HA gels showed a superiority in not only mechanical but also biological features, as evidenced by the enhanced tensile and compressive modulus, higher cell viability, faster cell proliferation and upregulated hyaline cartilage markers. In addition, it was found that the synthesis process could also affect the properties of the triple-phased composite, compared to blend-mixing HCA. The in situ-synthesized nHCA hydrogel showed an enhanced tensile modulus, as well as enhanced biological features compared with HCA. Our study demonstrated that the nHCA composite hydrogel holds promise in osteochondral regeneration. The addition of alginate and nano-HA contribute to the increase in both mechanical and biological properties. This study may provide a valuable reference for the design of an appropriate composite scaffold for osteochondral tissue engineering.
Collapse
Affiliation(s)
- Li Zheng
- The Medical and Scientific Research Center of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi 530021, People's Republic of China. Research Center for Regenerative Medicine, Guangxi Medical University, Nanning, Guangxi 530021, People's Republic of China
| | | | | | | | | |
Collapse
|
23
|
Minton J, Janney C, Akbarzadeh R, Focke C, Subramanian A, Smith T, McKinney J, Liu J, Schmitz J, James PF, Yousefi AM. Solvent-free polymer/bioceramic scaffolds for bone tissue engineering: fabrication, analysis, and cell growth. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:1856-74. [PMID: 25178801 DOI: 10.1080/09205063.2014.953016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This study examines the potential use of porous polycaprolactone (PCL) and polycaprolocatone/hydroxyapatite (PCL/HA) scaffolds fabricated through melt molding and porogen leaching for bone tissue engineering. While eliminating organic solvents is desirable, the process steps proposed in this study for uniformly dispersing HA particles (~5 μm in size) within the scaffold can also contribute to homogeneous properties for these porous composites. Poly(ethylene oxide) (PEO) was chosen as a porogen due to its similar density and melting point as PCL. Pore size of the scaffold was controlled by limiting the size of PCL and PEO particles used in fabrication. The percent of HA in the fabricated scaffolds was quantified by thermogravimetric analysis (TGA). Mechanical testing was used to compare the modulus of the scaffolds to that of bone, and the pore size distribution was examined with microcomputed tomography (μCT). Scanning electron microscopy (SEM) was used to examine the effect on scaffold morphology caused by the addition of HA particles. Both μCT and SEM results showed that HA could be incorporated into PCL scaffolds without negatively affecting scaffold morphology or pore formation. Energy-dispersive X-ray spectroscopy (EDS) and elemental mapping demonstrated a uniform distribution of HA within PCL/HA scaffolds. Murine calvaria-derived MC3T3-E1 cells were used to determine whether cells could attach on scaffolds and grow for up to 21 days. SEM images revealed an increase in cell attachment with the incorporation of HA into the scaffolds. Similarly, DNA content analysis showed a higher cell adhesion to PCL/HA scaffolds.
Collapse
Affiliation(s)
- Joshua Minton
- a Department of Chemical, Paper and Biomedical Engineering , Miami University , 650 E High Street, Oxford , OH 45056 , USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
In vivo degradation behavior of porous composite scaffolds of poly(lactide-co-glycolide) and nano-hydroxyapatite surface grafted with poly(L-lactide). CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1454-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
25
|
Liu Y, Huang Q, Feng Q. 3D scaffold of PLLA/pearl and PLLA/nacre powder for bone regeneration. Biomed Mater 2013; 8:065001. [DOI: 10.1088/1748-6041/8/6/065001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
26
|
Petrauskaite O, Gomes PDS, Fernandes MH, Juodzbalys G, Stumbras A, Maminskas J, Liesiene J, Cicciù M. Biomimetic mineralization on a macroporous cellulose-based matrix for bone regeneration. BIOMED RESEARCH INTERNATIONAL 2013; 2013:452750. [PMID: 24163816 PMCID: PMC3791641 DOI: 10.1155/2013/452750] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 08/15/2013] [Accepted: 08/21/2013] [Indexed: 11/25/2022]
Abstract
The aim of this study is to investigate the biomimetic mineralization on a cellulose-based porous matrix with an improved biological profile. The cellulose matrix was precalcified using three methods: (i) cellulose samples were treated with a solution of calcium chloride and diammonium hydrogen phosphate; (ii) the carboxymethylated cellulose matrix was stored in a saturated calcium hydroxide solution; (iii) the cellulose matrix was mixed with a calcium silicate solution in order to introduce silanol groups and to combine them with calcium ions. All the methods resulted in a mineralization of the cellulose surfaces after immersion in a simulated body fluid solution. Over a period of 14 days, the matrix was completely covered with hydroxyapatite crystals. Hydroxyapatite formation depended on functional groups on the matrix surface as well as on the precalcification method. The largest hydroxyapatite crystals were obtained on the carboxymethylated cellulose matrix treated with calcium hydroxide solution. The porous cellulose matrix was not cytotoxic, allowing the adhesion and proliferation of human osteoblastic cells. Comparatively, improved cell adhesion and growth rate were achieved on the mineralized cellulose matrices.
Collapse
Affiliation(s)
- Odeta Petrauskaite
- Department of Organic Technology, Kaunas University of Technology, Radvilenu pl. 19, 50254 Kaunas, Lithuania
| | - Pedro de Sousa Gomes
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Rua Dr. Manuel Pereira da Silva, 4200-392 Porto, Portugal
| | - Maria Helena Fernandes
- Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Rua Dr. Manuel Pereira da Silva, 4200-392 Porto, Portugal
| | - Gintaras Juodzbalys
- Department of Oral and Maxillofacial Surgery, Lithuanian University of Health Sciences, Eiveniu str. 2, 50009 Kaunas, Lithuania
| | - Arturas Stumbras
- Department of Oral and Maxillofacial Surgery, Lithuanian University of Health Sciences, Eiveniu str. 2, 50009 Kaunas, Lithuania
| | - Julius Maminskas
- Department of Oral and Maxillofacial Surgery, Lithuanian University of Health Sciences, Eiveniu str. 2, 50009 Kaunas, Lithuania
| | - Jolanta Liesiene
- Department of Organic Technology, Kaunas University of Technology, Radvilenu pl. 19, 50254 Kaunas, Lithuania
| | - Marco Cicciù
- Human Pathology Department, Dental School, University of Messina, Messina IT, Policlinico G. Martino, Via Consolare Valeria, 98100 Messina, Italy
| |
Collapse
|
27
|
Development of composite scaffolds for load-bearing segmental bone defects. BIOMED RESEARCH INTERNATIONAL 2013; 2013:458253. [PMID: 23984363 PMCID: PMC3745947 DOI: 10.1155/2013/458253] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 07/02/2013] [Indexed: 11/25/2022]
Abstract
The need for a suitable tissue-engineered scaffold that can be used to heal load-bearing segmental bone defects (SBDs) is both immediate and increasing. During the past 30 years, various ceramic and polymer scaffolds have been investigated for this application. More recently, while composite scaffolds built using a combination of ceramics and polymeric materials are being investigated in a greater number, very few products have progressed from laboratory benchtop studies to preclinical testing in animals. This review is based on an exhaustive literature search of various composite scaffolds designed to serve as bone regenerative therapies. We analyzed the benefits and drawbacks of different composite scaffold manufacturing techniques, the properties of commonly used ceramics and polymers, and the properties of currently investigated synthetic composite grafts. To follow, a comprehensive review of in vivo models used to test composite scaffolds in SBDs is detailed to serve as a guide to design appropriate translational studies and to identify the challenges that need to be overcome in scaffold design for successful translation. This includes selecting the animal type, determining the anatomical location within the animals, choosing the correct study duration, and finally, an overview of scaffold performance assessment.
Collapse
|
28
|
Abstract
Abatract: The poly (L-lactide)/laponite composite films are prepared by the method of solution blending with polylactide (PLA) and laponite. The results show that when laponite content was lower than 0.2 %( mass w/w), laponite can be uniform dispersed in PLA and the composed material had good stability. Fourier transform infrared spectroscopy (FTIR) study demonstrates that PLA was successfully incorporated with laponite by Si-O bond. The mechanical measurement reveals that the tensile strength of PLA/laponite composite film has been increased with compared to pure PLA. The water contact angle (WCA) tests indicate that the hydrophobicity of the laponite modified PLA films can be improved. The present study reveals that the laponite as a complexing agent can improve the mechanical properties and hydrophilicity of PLA.
Collapse
|
29
|
Dou Y, Wu C, Chang J. Preparation, mechanical property and cytocompatibility of poly(L-lactic acid)/calcium silicate nanocomposites with controllable distribution of calcium silicate nanowires. Acta Biomater 2012; 8:4139-50. [PMID: 22813849 DOI: 10.1016/j.actbio.2012.07.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 07/09/2012] [Accepted: 07/10/2012] [Indexed: 01/17/2023]
Abstract
How to accurately control the microstructure of bioactive inorganic/organic nanocomposites still remains a significant challenge, which is of great importance in influencing their mechanical strength and biological properties. In this study, using a combined method of electrospinning and hot press processing, calcium silicate hydrate (CSH) nanowire/poly(L-lactide) (PLLA) nanocomposites with controllable microstructures and tailored mechanical properties were successfully prepared as potential bone graft substitutes. The electrospun hybrid nanofibers with various degrees of alignment were stacked together in a predetermined manner and hot pressed into hierarchically structured nanocomposites. The relationship between the microstructure and mechanical properties of the as-prepared nanocomposites were systematically evaluated. The results showed that CSH nanowires in a PLLA matrix were able to be controlled from completely randomly oriented to uniaxially aligned, and then hierarchically organized with different interlayer angles, leading to corresponding nanocomposites with improved mechanical properties and varied anisotropies. It was also found that the bending strength of nanocomposites with 5 wt.% CSH nanowires (130 MPa) was significantly higher than that of pure PLLA (86 MPa) and other composites. The addition of CSH nanowires greatly enhanced the hydrophilicity and apatite-forming ability of PLLA films, as well as the attachment and proliferation of bone marrow stromal cells. The study suggested that a combination of electrospinning and hot pressing is a viable means to control the microstructure and mechanical properties, and improve the mineralization ability and cellular responses, of CSH/PLLA nanocomposites for potential bone repair applications.
Collapse
|
30
|
Iafisco M, Palazzo B, Ito T, Otsuka M, Senna M, Delgado-Lopez JM, Gomez-Morales J, Tampieri A, Prat M, Rimondini L. Preparation of core-shell poly(L-lactic) acid-nanocrystalline apatite hollow microspheres for bone repairing applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:2659-2669. [PMID: 22864504 DOI: 10.1007/s10856-012-4732-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Accepted: 07/23/2012] [Indexed: 06/01/2023]
Abstract
In this paper, hybrid inorganic-organic core-shell hollow microspheres, made of poly(L-lactic acid) (PLLA) and biomimetic nano apatites (HA), were prepared from biodegradable and biocompatible substances, suitable for bone tissue applications. Preparation is started from Pickering emulsification, i.e., solid particle-stabilized emulsions in the absence of any molecular surfactant, where solid particles adsorbed to an oil-water interface. Stable oil-in-water emulsions were produced using biomimetic 20 nm sized HA nanocrystals as particulate emulsifier and a dichloromethane (CH(2)Cl(2)) solution of PLLA as oil phase. Hybrid hollow PLLA microspheres at three different HA nanocrystals surface coverage, ranging from 10 to 50 μm, were produced. The resulting materials were completely characterized with spectroscopic, calorimetric and microscopic techniques and the cytocompatibility was established by indirect contact tests with both fibroblasts and osteoblasts and direct contact with these latter. They displayed a high level of cytocompatibility and thus represent promising materials for drug delivery systems, cell carriers and scaffolds for regeneration of bone useful in the treatment of orthopaedic, maxillofacial and dental fields.
Collapse
Affiliation(s)
- Michele Iafisco
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale, Novara, Italy.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Wang Z, Li M, Yu B, Cao L, Yang Q, Su J. Nanocalcium-deficient hydroxyapatite-poly (e-caprolactone)-polyethylene glycol-poly (e-caprolactone) composite scaffolds. Int J Nanomedicine 2012; 7:3123-31. [PMID: 22848159 PMCID: PMC3405873 DOI: 10.2147/ijn.s31162] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
A bioactive composite of nano calcium-deficient apatite (n-CDAP) with an atom molar ratio of calcium to phosphate (Ca/P) of 1.50 and poly(ɛ-caprolactone)–poly(ethylene glycol)–poly(ɛ-caprolactone) (PCL–PEG–PCL) was synthesized, and a composite scaffold was fabricated. The composite scaffolds with 40 wt% n-CDAP contained well interconnected macropores around 400 μm, and exhibited a porosity of 75%. The weight-loss ratio of the n-CDAP/PCL–PEG–PCL was significantly greater than nano hydroxyapatite (n-HA, Ca/P = 1.67)/PCL–PEG–PCL composite scaffolds during soaking into phosphate-buffered saline (pH 7.4) for 70 days, indicating that n-CDAP-based composite had good degradability compared with n-HA. The viability ratio of MG-63 cells was significantly higher on n-CDAP than n-HA-based composite scaffolds at 3 and 5 days. In addition, the alkaline phosphatase activity of the MG-63 cells cultured on n-CDAP was higher than n-HA-based composite scaffolds at 7 days. Histological evaluation showed that the introduction of n-CDAP into PCL–PEG–PCL enhanced the efficiency of new bone formation when the composite scaffolds were implanted into rabbit bone defects. The results suggested that the n-CDAP-based composite exhibits good biocompatibility, biodegradation, and osteogenesis in vivo.
Collapse
Affiliation(s)
- Zhiwei Wang
- Department of Orthopedics, Shanghai Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | | | | | | | | | | |
Collapse
|
32
|
Zhang CY, Zhang CL, Wang JF, Lu CH, Zhuang Z, Wang XP, Fang QF. Fabrication andin vitroinvestigation of nanohydroxyapatite, chitosan, poly(L-lactic acid) ternary biocomposite. J Appl Polym Sci 2012. [DOI: 10.1002/app.37795] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|