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Zhanbassynova A, Mukasheva F, Abilev M, Berillo D, Trifonov A, Akilbekova D. Impact of Hydroxyapatite on Gelatin/Oxidized Alginate 3D-Printed Cryogel Scaffolds. Gels 2024; 10:406. [PMID: 38920952 PMCID: PMC11203254 DOI: 10.3390/gels10060406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/12/2024] [Accepted: 06/14/2024] [Indexed: 06/27/2024] Open
Abstract
Fabrication of scaffolds via 3D printing is a promising approach for tissue engineering. In this study, we combined 3D printing with cryogenic crosslinking to create biocompatible gelatin/oxidized alginate (Gel/OxAlg) scaffolds with large pore sizes, beneficial for bone tissue regeneration. To enhance the osteogenic effects and mechanical properties of these scaffolds, we evaluated the impact of hydroxyapatite (HAp) on the rheological characteristics of the 2.86% (1:1) Gel/OxAlg ink. We investigated the morphological and mechanical properties of scaffolds with low, 5%, and high 10% HAp content, as well as the resulting bio- and osteogenic effects. Scanning electron microscopy revealed a reduction in pore sizes from 160 to 180 µm (HAp-free) and from 120 to 140 µm for both HAp-containing scaffolds. Increased stability and higher Young's moduli were measured for 5% and 10% HAp (18 and 21 kPa, respectively) compared to 11 kPa for HAp-free constructs. Biological assessments with mesenchymal stem cells indicated excellent cytocompatibility and osteogenic differentiation in all scaffolds, with high degree of mineralization in HAp-containing constructs. Scaffolds with 5% HAp exhibited improved mechanical characteristics and shape fidelity, demonstrated positive osteogenic impact, and enhanced bone tissue formation. Increasing the HAp content to 10% did not show any advantages in osteogenesis, offering a minor increase in mechanical strength at the cost of significantly compromised shape fidelity.
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Affiliation(s)
- Ainur Zhanbassynova
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan; (A.Z.)
| | - Fariza Mukasheva
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan; (A.Z.)
| | - Madi Abilev
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan; (A.Z.)
| | - Dmitriy Berillo
- Department of Chemistry and Biochemical Engineering, Satbayev University, Almaty 050013, Kazakhstan
| | - Alexander Trifonov
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan; (A.Z.)
| | - Dana Akilbekova
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan; (A.Z.)
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2
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Lun DX, Li SY, Li NN, Mou LM, Li HQ, Zhu WP, Li HF, Hu YC. Limitations and modifications in the clinical application of calcium sulfate. Front Surg 2024; 11:1278421. [PMID: 38486794 PMCID: PMC10937423 DOI: 10.3389/fsurg.2024.1278421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 01/29/2024] [Indexed: 03/17/2024] Open
Abstract
Calcium sulfate and calcium sulfate-based biomaterials have been widely used in non-load-bearing bone defects for hundreds of years due to their superior biocompatibility, biodegradability, and non-toxicity. However, lower compressive strength and rapid degradation rate are the main limitations in clinical applications. Excessive absorption causes a sharp increase in sulfate ion and calcium ion concentrations around the bone defect site, resulting in delayed wound healing and hypercalcemia. In addition, the space between calcium sulfate and the host bone, resulting from excessively rapid absorption, has adverse effects on bone healing or fusion techniques. This issue has been recognized and addressed. The lack of sufficient mechanical strength makes it challenging to use calcium sulfate and calcium sulfate-based biomaterials in load-bearing areas. To overcome these defects, the introduction of various inorganic additives, such as calcium carbonate, calcium phosphate, and calcium silicate, into calcium sulfate is an effective measure. Inorganic materials with different physical and chemical properties can greatly improve the properties of calcium sulfate composites. For example, the hydrolysis products of calcium carbonate are alkaline substances that can buffer the acidic environment caused by the degradation of calcium sulfate; calcium phosphate has poor degradation, which can effectively avoid the excessive absorption of calcium sulfate; and calcium silicate can promote the compressive strength and stimulate new bone formation. The purpose of this review is to review the poor properties of calcium sulfate and its complications in clinical application and to explore the effect of various inorganic additives on the physicochemical properties and biological properties of calcium sulfate.
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Affiliation(s)
- Deng-xing Lun
- Department of Spinal Degeneration and Oncology, Weifang People’s Hospital, Weifang City, Shandong, China
| | - Si-ying Li
- Department of Spinal Degeneration and Oncology, Weifang People’s Hospital, Weifang City, Shandong, China
| | - Nian-nian Li
- Department of Spinal Degeneration and Oncology, Weifang People’s Hospital, Weifang City, Shandong, China
| | - Le-ming Mou
- Department of Spinal Degeneration and Oncology, Weifang People’s Hospital, Weifang City, Shandong, China
| | - Hui-quan Li
- Department of Spinal Degeneration and Oncology, Weifang People’s Hospital, Weifang City, Shandong, China
| | - Wan-ping Zhu
- Department of Spinal Degeneration and Oncology, Weifang People’s Hospital, Weifang City, Shandong, China
| | - Hong-fei Li
- Department of Spinal Degeneration and Oncology, Weifang People’s Hospital, Weifang City, Shandong, China
| | - Yong-cheng Hu
- Department of Bone Oncology, Tianjin Hospital, Tianjin, China
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Xue W, Dai B, Zhai K, Song H, Wen W, Zhai S. Temperature-dependent Raman spectra and thermal expansion of MgP 2O 6. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123239. [PMID: 37562214 DOI: 10.1016/j.saa.2023.123239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 07/28/2023] [Accepted: 08/04/2023] [Indexed: 08/12/2023]
Abstract
The Raman spectra and thermal expansion of MgP2O6 metaphosphate were investigated at various temperatures up to 1073 K at ambient pressure. No temperature-induced phase transition was observed in this study. The effect of temperature on the Raman active vibrations and unit cell parameters was determined. All the observed Raman active bands of MgP2O6 showed linear temperature dependences in the range of -2.61 × 10-2 ∼ -0.49 × 10-2 cm-1 K-1. The thermal expansion coefficient of MgP2O6 was estimated to be 3.21(2) × 10-5 K-1. An axial anisotropic thermal expansion exists and the c-axis shows the smallest thermal expansion. The isobaric mode Grüneisen parameters of MgP2O6 were calculated. The obtained results were compared with other compounds in the MgO-P2O5 system.
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Affiliation(s)
- Weihong Xue
- Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Bo Dai
- Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kuan Zhai
- Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haipeng Song
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
| | - Wen Wen
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Shuangmeng Zhai
- Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.
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4
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Chen H, Shen M, Shen J, Li Y, Wang R, Ye M, Li J, Zhong C, Bao Z, Yang X, Li X, Gou Z, Xu S. A new injectable quick hardening anti-collapse bone cement allows for improving biodegradation and bone repair. BIOMATERIALS ADVANCES 2022; 141:213098. [PMID: 36063576 DOI: 10.1016/j.bioadv.2022.213098] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/26/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
The development of injectable cement-like biomaterials via a minimally invasive approach has always attracted considerable clinical interest for modern bone regeneration and repair. Although α-tricalcium phosphate (α-TCP) powders may readily react with water to form hydraulic calcium-deficient hydroxyapatite (CDHA) cement, its long setting time, poor anti-collapse properties, and low biodegradability are suboptimal for a variety of clinical applications. This study aimed to develop new injectable α-TCP-based bone cements via strontium doping, α-calcium sulfate hemihydrate (CSH) addition and liquid phase optimization. A combination of citric acid and chitosan was identified to facilitate the injectable and anti-washout properties, enabling higher resistance to structure collapse. Furthermore, CSH addition (5 %-15 %) was favorable for shortening the setting time (5-20 min) and maintaining the compressive strength (10-14 MPa) during incubation in an aqueous buffer medium. These α-TCP-based composites could also accelerate the biodegradation rate and new bone regeneration in rabbit lateral femoral bone defect models in vivo. Our studies demonstrate that foreign ion doping, secondary phase addition and liquid medium optimization could synergistically improve the physicochemical properties and biological performance of α-TCP-based bone cements, which will be promising biomaterials for repairing bone defects in situations of trauma and diseased bone.
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Affiliation(s)
- Huaizhi Chen
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Miaoda Shen
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Jian Shen
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Yifan Li
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Ruo Wang
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Meihan Ye
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Jiafeng Li
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Cheng Zhong
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Zhaonan Bao
- Bio-nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University, Hangzhou 310058, China
| | - Xianyan Yang
- Bio-nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University, Hangzhou 310058, China
| | - Xigong Li
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China
| | - Zhongru Gou
- Bio-nanomaterials and Regenerative Medicine Research Division, Zhejiang-California International Nanosystem Institute, Zhejiang University, Hangzhou 310058, China.
| | - Sanzhong Xu
- Department of Orthopedics, the First Affiliated Hospital, School of Medicine of Zhejiang University, Hangzhou 310003, China.
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5
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Mistry S, Roy R, Jha AK, Pandit N, Das S, Burman S, Joy M. Treatment of long bone infection by a biodegradable bone cement releasing antibiotics in human. J Control Release 2022; 346:180-192. [PMID: 35447299 DOI: 10.1016/j.jconrel.2022.04.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 03/30/2022] [Accepted: 04/11/2022] [Indexed: 11/15/2022]
Abstract
Repair of methicillin-resistant Staphylococcal (MRSA) chronic osteomyelitis and resulting bone defect is one of the major challenges in orthopaedics. Previous study has shown the effectiveness of antibiotic loaded biodegradable composite bone cement with in vitro tests and in the treatment of experimental osteomyelitis. The cement is composed of poly(lactide-co-glycolide) encapsulated antibiotic-biphasic calcium phosphate granule complex and additive antibiotic powder in gypsum binder. In this study, the cement was studied further to evaluate its in vitro biological properties (cytocompatibility, platelet activation), anti-infective, and bone regenerative potential in comparison to poly(methyl methacrylate) (PMMA) cement and parenteral therapy in 43 patients (age 5-57 years) with chronic MRSA osteomyelitis by analyzing the results of histopathology, radiographs, magnetic resonance imaging, scanning electron microscopy, and serum drug concentrations for 1 year. The composite cement showed superior cytocompatibility and coagulant activity compared to PMMA cement. Moreover, the results of different postoperative clinical and radiological examinations also proved the supremacy of composite cement over the other treatment modalities in terms of success rate, faster sepsis control and bone regeneration. Low serum antibiotic concentrations and normal serum calcium levels indicate that the calcium-rich composite cement is safe for application in human. Therefore, we conclude that the composite bone cement is a promising candidate for the treatment of chronic osteomyelitis.
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Affiliation(s)
- Surajit Mistry
- Department of Periodontics, Burdwan Dental College & Hospital, Powerhouse Para, West Bengal 713101, India.
| | - Rajiv Roy
- Department of Orthopaedics, Calcutta National Medical College & Hospital, Kolkata, West Bengal 700014, India
| | - Amit Kumar Jha
- Department of Orthopaedics, Apex Hospital, Varanasi, Uttar Pradesh 221004, India
| | - Narayan Pandit
- Department of Radiodiagnosis, North Bengal Medical College & Hospital, Siliguri, West Bengal 734012, India
| | - Sabyasachi Das
- Department of Anaesthesiology, Medical College Kolkata, 88-College Street, Kolkata, West Bengal 700073, India
| | - Subhasish Burman
- Department of Oral & Maxillofacial Surgery, Burdwan Dental College & Hospital, Powerhouse Para, West Bengal 713101, India
| | - Mathew Joy
- Department of Chemistry, T.I.M.E., Erode, Tamil Nadu 638003, India
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6
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Liu Y, Cheng X, Wang X, Sun Q, Wang C, Di P, Lin Y. Micro-arc oxidation-assisted sol-gel preparation of calcium metaphosphate coatings on magnesium alloys for bone repair. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 131:112491. [PMID: 34857277 DOI: 10.1016/j.msec.2021.112491] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/07/2021] [Accepted: 10/10/2021] [Indexed: 10/20/2022]
Abstract
Calcium phosphate coating is an attractive surface modification strategy for magnesium alloys, since it can increase their corrosion resistance and endow them with osteogenic function simultaneously. Herein, a calcium metaphosphate (CMP) coating was fabricated on magnesium alloy by using sol-gel approach assisted with micro-arc oxidation pre-treatment. Scanning electron microscopy showed that the micro-pores and cracks in micro-arc oxidation inner layer generated during the pre-treatment process were sealed by the grainy sol-gel outer layer. Energy dispersive spectrometry and X-ray diffraction results demonstrated the identity of the coating as CMP. The cross-cut test showed that the adhesion of CMP coating was strong. Applying bare magnesium alloy substrate as a control, the CMP coating surface was rougher and more hydrophilic. The potentiodynamic polarization test demonstrated that the corrosion resistance was significantly improved by using CMP coating. Hydrogen evolution in immersion test further confirmed that the degradation rate was decelerated within 14 days. Moreover, CMP coating facilitated the adhesion speed, spreading area, and focal adhesion formation of bone marrow stem cells. The number of cells in the active proliferating state and proliferated cells present on the CMP coating also increased. Additionally, CMP coating upregulated alkaline phosphatase activity and osteogenic gene expression in cells. In summary, the micro-arc oxidation assisted sol-gel CMP coatings increased the corrosion resistance and promoted the interfacial cell behavior for magnesium alloy implants, which might inform the further development of surface modifications on magnesium alloys for bone related applications.
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Affiliation(s)
- Yanping Liu
- Department of Oral Implantology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Xian Cheng
- Xiangya Hospital Stomatological Hospital, Central South University, Changsha, Hunan 410000, China; Department of Dentistry-Biomaterials, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, the Netherlands
| | - Xiyuan Wang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Qiu Sun
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Chenxi Wang
- Department of Oral Implantology, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Ping Di
- Department of Oral Implantology, Peking University School and Hospital of Stomatology, Beijing 100081, China.
| | - Ye Lin
- Department of Oral Implantology, Peking University School and Hospital of Stomatology, Beijing 100081, China.
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7
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Chen KJ, Hung FY, Wang YT, Yen CW. Mechanical properties and biomedical application characteristics of degradable polylactic acid-Mg-Ca 3(PO 4) 2 three-phase composite. J Mech Behav Biomed Mater 2021; 125:104949. [PMID: 34736029 DOI: 10.1016/j.jmbbm.2021.104949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/21/2021] [Accepted: 10/25/2021] [Indexed: 11/29/2022]
Abstract
Polylactic acid (PLA), pure magnesium powder, and calcium phosphate powder were used to form a three-phase degradable biomedical composite. The effects of various powder proportions in polylactic acid-Mg-Ca3(PO4)2 composites were analyzed through mechanical and biological tests, which revealed that both the tensile and impact strength of the composite increased. Additionally, ductility presented only after a small proportion of powder was added. Hardness slightly increased because of dispersion strengthening. Furthermore, the addition of pure magnesium and calcium phosphate accelerated the degradation rate, and biocompatible salts were generated after degradation, which can improve healing and renewal in bone tissue. None of the composites exhibited cytotoxicity, meeting biological safety requirements. Overall, PLA10M10C (10 wt.% Mg, 10 wt.% Ca3(PO4)2) exhibited superior performance. Accordingly, PLA10M10C can serve as a reference for degradable biomedical material applications in orthopedic implants.
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Affiliation(s)
- Kuan-Jen Chen
- Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan, 710, Taiwan.
| | - Fei-Yi Hung
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan.
| | - Yun-Ting Wang
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan
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8
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Chang HY, Tuan WH, Lai PL. Biphasic ceramic bone graft with biphasic degradation rates. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111421. [PMID: 33255022 DOI: 10.1016/j.msec.2020.111421] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/04/2020] [Accepted: 08/16/2020] [Indexed: 11/28/2022]
Abstract
In this study, the characteristics of a novel biphasic bone graft are reported. The bone graft is a physical mixture of calcium sulfate (CS) and hydroxyapatite (HA). This biphasic bone graft was prepared by sintering at 1100 °C. Since the degradation rate of CS is much faster than that of HA, the CS/HA biphasic bone graft exhibits two degradation rates. The degradation rate is rapid (~10 wt%/week) in the first stage and then slow (~1 wt%/week) in the second stage. The biphasic bone graft has been implanted into the distal femur of rat. Most the bone graft was degraded 13 weeks postoperatively. Instead, trabecular bone and vascular tissue are observed at the location of implant. The bone graft is unique for its burst of calcium ions at the start and its ability to remain stable throughout the degradation process. Its stable porous structure serves as an ideal scaffold for the formation of new bone as well as vascularization.
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Affiliation(s)
- Hao-Yu Chang
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Wei-Hsing Tuan
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
| | - Po-Liang Lai
- Department of Orthopedic Surgery, Bone and Joint Research Center, Chang Gung Memorial Hospital at Linkou, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
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Verma S, Murugavel R. Di- tert-butylphosphate Derived Thermolabile Calcium Organophosphates: Precursors for Ca(H 2PO 4) 2, Ca(HPO 4), α-/β-Ca(PO 3) 2, and Nanocrystalline Ca 10(PO 4) 6(OH) 2. Inorg Chem 2020; 59:13233-13244. [PMID: 32892621 DOI: 10.1021/acs.inorgchem.0c01591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thermally and hydrolytically unstable di-tert-butyl phosphate (dtbp-H) has been used as synthon to prepare discrete and polymeric calcium phosphates that are convenient single-source precursors for a range of calcium phosphate ceramic biomaterials. The reactivity of dtbp-H toward two different calcium sources has been found to vary significantly, e.g., the reaction of Ca(OMe)2 with dtbp-H in a 1:6 molar ratio in petroleum ether forms a mononuclear calcium hexa-phosphate complex [Ca(dtbp)2(dtbp-H)4] (1), whereas the change of calcium source to CaH2, in a 1:2 molar ratio under otherwise similar reaction conditions, yields the calcium phosphate polymer, [Ca(μ-dtbp)2(H2O)2·H2O]n(2). Compounds 1 and 2 have been extensively characterized by various spectroscopic and analytical techniques. The solid-state structures of both 1 and 2 have been determined by single-crystal X-ray diffraction studies. In discrete molecule 1, the central calcium ion is surrounded by two anionic dtbp and four neutral dtbp-H ligands in an octahedral coordination environment. Compound 2 is a one-dimensional polymer in which adjacent calcium ions are connected through double dtbp bridges. Solid-state thermolysis of bulk 1 in air leads to the exclusive formation of calcium metaphosphate β-Ca(PO3)2 in the entire temperature range of 400-800 °C. Thermal decomposition of polymer 2, however, can be fine-tuned to produce either α-Ca(PO3)2 or β-Ca(PO3)2 depending on the thermolysis conditions employed. Although the sample sintered at 600 °C produces exclusively α-form of Ca(PO3)2, the sample annealed at 800 °C or above produces β-form. Both α- and β-forms can also be successively formed one after other by a slow heating of a freshly prepared 2 on the powder diffractometer sample holder. Additional forms of ceramic phosphates have been prepared by solvothermal conditions because of the highly labile nature of the tert-butoxy groups of dtbp in 1 and 2. Solution decomposition of either 1 or 2 in boiling toluene at 140 °C in a sealed tube produces calcium dihydrogen phosphate [Ca(H2PO4)2·H2O] as the only product in the form of single crystals. Solution thermolysis of 2 in protic solvents such as water and methanol can be biased to produce other calcium phosphate biomaterials such as hydroxyapatite [Ca10(PO4)6(OH)2]and calcium monohydrogen phosphate [Ca(HPO4)] in the presence of additional calcium precursors such as CaO and Ca(OMe)2, respectively.
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Affiliation(s)
- Sonam Verma
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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10
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Magnesium phosphate ceramics incorporating a novel indene compound promote osteoblast differentiation in vitro and bone regeneration in vivo. Biomaterials 2017; 157:51-61. [PMID: 29245051 DOI: 10.1016/j.biomaterials.2017.11.032] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/15/2017] [Accepted: 11/21/2017] [Indexed: 02/04/2023]
Abstract
Incorporating bioactive molecules into synthetic ceramic scaffolds is challenging. In this study, to enhance bone regeneration, a magnesium phosphate (MgP) ceramic scaffold was incorporated with a novel indene compound, KR-34893. KR-34893 induced the deposition of minerals and expression of osteoblast marker genes in primary human bone marrow mesenchymal stem cells (BMSCs) and a mouse osteoblastic MC3T3-E1 cell line. Analysis of the mode of action showed that KR-34893 induced the phosphorylation of MAPK/extracellular signal-regulated kinase and extracellular signal-regulated kinase, and subsequently the expression of bone morphogenetic protein 7, accompanied by SMAD1/5/8 phosphorylation. Accordingly, KR-34893 was incorporated into an MgP scaffold prepared by 3D printing at room temperature, followed by cement reaction. KR-34893-incorporated MgP (KR-MgP) induced the expression of osteoblast differentiation marker genes in vitro. In a rat calvaria defect model, KR-MgP scaffolds enhanced bone regeneration and increased bone volume compared with MgP scaffolds, as assessed by micro-computed tomography and histological analyses. In conclusion, we developed a method for producing osteoinductive MgP scaffolds incorporating a bioactive organic compound, without high temperature sintering. The KR-MgP scaffolds enhanced osteoblast activation in vitro and bone regeneration in vivo.
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11
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Xie H, Wang J, He Y, Gu Z, Xu J, Li L, Ye Q. Biocompatibility and safety evaluation of a silk fibroin-doped calcium polyphosphate scaffold copolymer in vitro and in vivo. RSC Adv 2017. [DOI: 10.1039/c7ra04999d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
For the reconstruction of cartilage and bone defects, bone repair scaffolds with porous network structures have been extensively studied.
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Affiliation(s)
- Huixu Xie
- JCU-WMU Joint Research Group of Tissue Engineering
- Wenzhou Medical University
- Wenzhou
- China
- West China School of Stomatology
| | - Jianyun Wang
- Department of Orthopaedics and Traumatology
- The University of Hong Kong
- China
- Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma
- The University of Hong Kong Shenzhen Hospital
| | - Yan He
- JCU-WMU Joint Research Group of Tissue Engineering
- Wenzhou Medical University
- Wenzhou
- China
- Regenerative Dentistry
| | - Zhipeng Gu
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510006
- China
| | - Jia Xu
- JCU-WMU Joint Research Group of Tissue Engineering
- Wenzhou Medical University
- Wenzhou
- China
| | - Longjiang Li
- West China School of Stomatology
- Sichuan University
- Chengdu 610041
- China
- State Key Laboratory of Oral Diseases
| | - Qingsong Ye
- JCU-WMU Joint Research Group of Tissue Engineering
- Wenzhou Medical University
- Wenzhou
- China
- Regenerative Dentistry
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12
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Queiroz TP, de Molon RS, Souza FÁ, Margonar R, Thomazini AHA, Guastaldi AC, Hochuli-Vieira E. In vivo evaluation of cp Ti implants with modified surfaces by laser beam with and without hydroxyapatite chemical deposition and without and with thermal treatment: topographic characterization and histomorphometric analysis in rabbits. Clin Oral Investig 2016; 21:685-699. [DOI: 10.1007/s00784-016-1936-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 08/05/2016] [Indexed: 11/24/2022]
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13
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Mello ASDS, dos Santos PL, Marquesi A, Queiroz TP, Margonar R, de Souza Faloni AP. Some aspects of bone remodeling around dental implants. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.piro.2015.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Sun M, Liu A, Ma C, Shao H, Yu M, Liu Y, Yan S, Gou Z. Systematic investigation of β-dicalcium silicate-based bone cements in vitro and in vivo in comparison with clinically applied calcium phosphate cement and Bio-Oss®. RSC Adv 2016. [DOI: 10.1039/c5ra21340a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Herein we systematically investigated the biological performance of a β-dicalcium silicate (β-C2S)-based bone cement in comparison with the clinically used calcium phosphate cement (CPC) and Bio-Oss®.
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Affiliation(s)
- Miao Sun
- Department of Oral and Maxillofacial Surgery
- Second Affiliated Hospital
- School of Medicine
- Zhejiang University
- Hangzhou 310009
| | - An Liu
- Department of Orthopaedic Surgery
- Second Affiliated Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Chiyuan Ma
- Department of Orthopaedic Surgery
- Second Affiliated Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Huifeng Shao
- The State Key Lab of Fluid Power Transmission and Control Systems
- College of Mechanical Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Menghua Yu
- Department of Oral and Maxillofacial Surgery
- Second Affiliated Hospital
- School of Medicine
- Zhejiang University
- Hangzhou 310009
| | - Yanming Liu
- Department of Oral and Maxillofacial Surgery
- Second Affiliated Hospital
- School of Medicine
- Zhejiang University
- Hangzhou 310009
| | - Shigui Yan
- Department of Orthopaedic Surgery
- Second Affiliated Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Zhongru Gou
- Zhejiang-California International Nanosystems Institute
- Zhejiang University
- Hangzhou 310029
- China
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15
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NEVAREZ-RASCON A, GONZÁLEZ-LOPEZ S, ACOSTA-TORRES LS, NEVAREZ-RASCON MM, ORRANTIA- BORUNDA E. Synthesis, biocompatibility and mechanical properties of ZrO 2-Al 2O 3 ceramics composites. Dent Mater J 2016; 35:392-8. [DOI: 10.4012/dmj.2015-028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Extracellular calcium-binding peptide-modified ceramics stimulate regeneration of calvarial bone defects. Tissue Eng Regen Med 2015; 13:57-65. [PMID: 30603385 DOI: 10.1007/s13770-015-9066-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 08/24/2015] [Accepted: 08/27/2015] [Indexed: 12/26/2022] Open
Abstract
Secreted protein, acidic, cysteine-rich (SPARC)-related modular calcium binding 1 (SMOC1) has been implicated in the regulation of osteogenic differentiation of human bone marrow mesenchymal stem cells (BMSCs). In this study, we found that a peptide (16 amino acids in length), which is located in the extracellular calcium (EC) binding domain of SMOC1, stimulated osteogenic differentiation of human BMSCs in vitro and calvarial bone regeneration in vivo. Treatment of BMSCs with SMOC1-EC peptide significantly stimulated their mineralization in a dose-dependent manner without changing their rate of proliferation. The expression of osteogenic differentiation marker genes, including type 1 collagen and osteocalcin, also increased in a dose-dependent manner. To examine the effect of the SMOC1-EC peptide on bone formation in vivo, the peptide was covalently immobilized onto hydroxyapatite/β-tricalcium phosphate (HA/β-TCP) particles. X-ray photoelectron spectroscopy analysis showed that the peptide was successfully immobilized onto the surface of HA/β-TCP. Implantation of the SMOC1-EC peptide-immobilized HA/β-TCP particles into mouse calvarial defects and subsequent analyses using microcomputed tomography and histology showed significant bone regeneration compared with that of calvarial defects implanted with unmodified HA/β-TCP particles. Collectively, our data suggest that a peptide derived from the EC domain of SMOC1 induces osteogenic differentiation of human BMSCs in vitro and efficiently enhances bone regeneration in vivo.
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17
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Chen L, Song W, Markel DC, Shi T, Muzik O, Matthew H, Ren W. Flow perfusion culture of MC3T3-E1 osteogenic cells on gradient calcium polyphosphate scaffolds with different pore sizes. J Biomater Appl 2015; 30:908-18. [DOI: 10.1177/0885328215608335] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Calcium polyphosphate is a biodegradable bone substitute. It remains a challenge to prepare porous calcium polyphosphate with desired gradient porous structures. In this study, a modified one-step gravity sintering method was used to prepare calcium polyphosphate scaffolds with desired-gradient-pore-size distribution. The differences of porous structure, mechanical strength, and degradation rate between gradient and homogenous calcium polyphosphate scaffolds were evaluated by micro-computed tomography, scanning electron microscopy, and mechanical testing. Preosteoblastic MC3T3-E1 cells were seeded onto gradient and homogenous calcium polyphosphate scaffolds and cultured in a flow perfusion bioreactor. The distribution, proliferation, and differentiation of the MC3T3-E1 cells were compared to that of homogenous calcium polyphosphate scaffolds. Though no significant difference of cell proliferation was found between the gradient and the homogenous calcium polyphosphate scaffolds, a much higher cell differentiation and mineralization were observed in the gradient calcium polyphosphate scaffolds than that of the homogenous calcium polyphosphate scaffolds, as manifested by increased alkaline phosphatase activity ( p < 0.05). The improved distribution and differentiation of cultured cells within gradient scaffolds were further supported by both 18F-fluorine micro-positron emission tomography scanning and in vitro tetracycline labeling. We conclude that the calcium polyphosphate scaffold with gradient pore sizes enhances osteogenic cell differentiation as well as mineralization. The in vivo performance of gradient calcium polyphosphate scaffolds warrants further investigation in animal bone defect models.
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Affiliation(s)
- Liang Chen
- Department of Biomedical Engineering, Wayne State University, USA
| | - Wei Song
- Department of Biomedical Engineering, Wayne State University, USA
| | - David C Markel
- Detroit Medical Center & Providence Hospital Orthopaedic Residency, USA
- Department of Orthopaedic Surgery, Providence Hospital and Medical Centers, USA
| | - Tong Shi
- Department of Biomedical Engineering, Wayne State University, USA
| | | | - Howard Matthew
- Department of Biomedical Engineering, Wayne State University, USA
| | - Weiping Ren
- Department of Biomedical Engineering, Wayne State University, USA
- Department of Orthopaedic Surgery, Providence Hospital and Medical Centers, USA
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18
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Musa M, Mohd Ali K, Kannan TP, Azlina A, Omar NS, Chatterji A, Mokhtar KI. Effects of Perivitelline Fluid Obtained from Horseshoe Crab on The Proliferation and Genotoxicity of Dental Pulp Stem Cells. CELL JOURNAL 2015. [PMID: 26199904 PMCID: PMC4503839 DOI: 10.22074/cellj.2016.3726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Objective Perivitelline fluid (PVF) of the horseshoe crab embryo has been reported to
possess an important role during embryogenesis by promoting cell proliferation. This
study aims to evaluate the effect of PVF on the proliferation, chromosome aberration (CA)
and mutagenicity of the dental pulp stem cells (DPSCs).
Materials and Methods This is an in vitro experimental study. PVF samples were
collected from horseshoe crabs from beaches in Malaysia and the crude extract was
prepared. DPSCs were treated with different concentrations of PVF crude extract in
an 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay (cytotoxicity test). We choose two inhibitory concentrations (IC50 and IC25) and two PVF
concentrations which produced more cell viability compared to a negative control
(100%) for further tests. Quantitative analysis of the proliferation activity of PVF was
studied using the AlamarBlue®assay for 10 days. Population doubling times (PDTs)
of the treatment groups were calculated from this assay. Genotoxicity was evaluated
based on the CA and Ames tests. Statistical analysis was carried out using independent t test to calculate significant differences in the PDT and mitotic indices in the CA
test between the treatment and negative control groups. Significant differences in the
data were P<0.05.
Results A total of four PVF concentrations retrieved from the MTT assay were
26.887 mg/ml (IC50), 14.093 mg/ml (IC25), 0.278 mg/ml (102% cell viability) and 0.019
mg/ml (102.5% cell viability). According to the AlamarBlue®assay, these PVF groups
produced comparable proliferation activities compared to the negative (untreated)
control. PDTs between PVF groups and the negative control were insignificantly different (P>0.05). No significant aberrations in chromosomes were observed in the
PVF groups and the Ames test on the PVF showed the absence of significant positive
results.
Conclusion PVF from horseshoe crabs produced insignificant proliferative activity on
treated DPSCs. The PVF was non-genotoxic based on the CA and Ames tests.
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Affiliation(s)
- Marahaini Musa
- School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Khadijah Mohd Ali
- School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Thirumulu Ponnuraj Kannan
- School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia ; Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Ahmad Azlina
- School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
| | - Nor Shamsuria Omar
- School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia ; Institute of Tropical Aquaculture (AQUATROP), University Malaysia Terengganu, Terengganu, Malaysia
| | - Anil Chatterji
- National Institute of Oceanography (NIO), Dona Paula, India
| | - Khairani Idah Mokhtar
- Kulliyah of Dentistry, International Islamic University of Malaysia, Jalan Sultan Ahmad Shah, Pahang, Malaysia
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19
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Uskoković V. Nanostructured platforms for the sustained and local delivery of antibiotics in the treatment of osteomyelitis. Crit Rev Ther Drug Carrier Syst 2015; 32:1-59. [PMID: 25746204 PMCID: PMC4406243 DOI: 10.1615/critrevtherdrugcarriersyst.2014010920] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This article provides a critical view of the current state of the development of nanoparticulate and other solid-state carriers for the local delivery of antibiotics in the treatment of osteomyelitis. Mentioned are the downsides of traditional means for treating bone infection, which involve systemic administration of antibiotics and surgical debridement, along with the rather imperfect local delivery options currently available in the clinic. Envisaged are more sophisticated carriers for the local and sustained delivery of antimicrobials, including bioresorbable polymeric, collagenous, liquid crystalline, and bioglass- and nanotube-based carriers, as well as those composed of calcium phosphate, the mineral component of bone and teeth. A special emphasis is placed on composite multifunctional antibiotic carriers of a nanoparticulate nature and on their ability to induce osteogenesis of hard tissues demineralized due to disease. An ideal carrier of this type would prevent the long-term, repetitive, and systemic administration of antibiotics and either minimize or completely eliminate the need for surgical debridement of necrotic tissue. Potential problems faced by even hypothetically "perfect" antibiotic delivery vehicles are mentioned too, including (i) intracellular bacterial colonies involved in recurrent, chronic osteomyelitis; (ii) the need for mechanical and release properties to be adjusted to the area of surgical placement; (iii) different environments in which in vitro and in vivo testings are carried out; (iv) unpredictable synergies between drug delivery system components; and (v) experimental sensitivity issues entailing the increasing subtlety of the design of nanoplatforms for the controlled delivery of therapeutics.
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Affiliation(s)
- Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, Richard and Loan Hill Department of Bioengineering, College of Medicine, University of Illinois at Chicago, 851 South Morgan St, #205 Chicago, Illinois, 60607-7052
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20
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Uskoković V, Desai TA. Nanoparticulate drug delivery platforms for advancing bone infection therapies. Expert Opin Drug Deliv 2014; 11:1899-912. [PMID: 25109804 PMCID: PMC4393954 DOI: 10.1517/17425247.2014.944860] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
INTRODUCTION The ongoing surge of resistance of bacterial pathogens to antibiotic therapies and the consistently aging median member of the human race signal an impending increase in the incidence of chronic bone infection. Nanotechnological platforms for local and sustained delivery of therapeutics hold the greatest potential for providing minimally invasive and maximally regenerative therapies for this rare but persistent condition. AREAS COVERED Shortcomings of the clinically available treatment options, including poly(methyl methacrylate) beads and calcium sulfate cements, are discussed and their transcending using calcium-phosphate/polymeric nanoparticulate composites is foreseen. Bone is a composite wherein the weakness of each component alone is compensated for by the strength of its complement and an ideal bone substitute should be fundamentally the same. EXPERT OPINION Discrepancy between in vitro and in vivo bioactivity assessments is highlighted, alongside the inherent imperfectness of the former. Challenges entailing the cross-disciplinary nature of engineering a new generation of drug delivery vehicles are delineated and it is concluded that the future for the nanoparticulate therapeutic carriers belongs to multifunctional, synergistic and theranostic composites capable of simultaneously targeting, monitoring and treating internal organismic disturbances in a smart, feedback fashion and in direct response to the demands of the local environment.
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Affiliation(s)
- Vuk Uskoković
- University of Illinois, Department of Bioengineering, Advanced Materials and Bionanotechnology Laboratory, Chicago, IL 60607-7052, USA
| | - Tejal A Desai
- University of California, Therapeutic Micro and Nanotechnology Laboratory, Department of Bioengineering and Therapeutic Sciences, San Francisco, CA 94158-2330, USA
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21
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Inhibitory effects of triptolide on titanium particle-induced osteolysis and receptor activator of nuclear factor-κB ligand-mediated osteoclast differentiation. INTERNATIONAL ORTHOPAEDICS 2014; 39:173-82. [DOI: 10.1007/s00264-014-2596-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 11/04/2014] [Indexed: 12/14/2022]
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22
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Wang J, Zhang L, Sun X, Chen X, Xie K, Lin M, Yang G, Xu S, Xia W, Gou Z. Preparation and in vitro evaluation of strontium-doped calcium silicate/gypsum bioactive bone cement. Biomed Mater 2014; 9:045002. [PMID: 24945787 DOI: 10.1088/1748-6041/9/4/045002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The combination of two or more bioactive components with different biodegradability could cooperatively improve the physicochemical and biological performances of the biomaterials. Here we explore the use of α-calcium sulfate hemihydrate (α-CSH) and calcium silicate with and without strontium doping (Sr-CSi, CSi) to fabricate new bioactive cements with appropriate biodegradability as bone implants. The cements were fabricated by adding different amounts (0-35 wt%) of Sr-CSi (or CSi) into the α-CSH-based pastes at a liquid-to-solid ratio of 0.4. The addition of Sr-CSi into α-CSH cements not only led to a pH rise in the immersion medium, but also changed the surface reactivity of cements, making them more bioactive and therefore promoting apatite mineralization in simulated body fluid (SBF). The impact of additives on long-term in vitro degradation was evaluated by soaking the cements in Tris buffer, SBF, and α-minimal essential medium (α-MEM) for a period of five weeks. An addition of 20% Sr-CSi to α-CSH cement retarded the weight loss of the samples to 36% (in Tris buffer), 43% (in SBF) and 54% (in α-MEM) as compared with the pure α-CSH cement. However, the addition of CSi resulted in a slightly faster degradation in comparison with Sr-CSi in these media. Finally, the in vitro cell-ion dissolution products interaction study using human fetal osteoblast cells demonstrated that the addition of Sr-CSi improved cell viability and proliferation. These results indicate that tailorable bioactivity and biodegradation behavior can be achieved in gypsum cement by adding Sr-CSi, and such biocements will be of benefit for enhancing bone defect repair.
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Affiliation(s)
- Juncheng Wang
- Department of Orthopedics, Rui'an People's Hospital & the 3rd Hospital Affiliated to Wenzhou Medical University, Rui'an 325200, People's Republic of China
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23
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Nilsson M, Zheng MH, Tägil M. The composite of hydroxyapatite and calcium sulphate: a review of preclinical evaluation and clinical applications. Expert Rev Med Devices 2014; 10:675-84. [PMID: 24053255 DOI: 10.1586/17434440.2013.827529] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Recent publications have shown that the combination of α-calcium sulfate hemihydrate, the densest form of hydrates and hydroxyapatite (HA) particles gives good clinical outcome in various applications. It has large potential as bone substitute since the material transforms to bone throughout the entire volume and not only by creeping substitution, from the surface toward the inside. Release of important proteins for osteogenesis has been observed around implanted material and is speculated to be due to fast dissolution of the calcium sulfate phase in combination with the osteoconductive and bioactive nature of HA. In diabetic foot infection, the osteoconductive HA/calcium sulfate material has been successfully used loaded with antibiotics and since it is injectable, the application is minimally invasive, easy and precise. It is a bone substitute for the future.
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Affiliation(s)
- Malin Nilsson
- Department of Orthopedics, Clinical Sciences Lund, Lund University, Lund, Sweden
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24
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Choi YA, Seol MY, Shin HI, Park EK. Bobby Sox homology regulates odontoblast differentiation of human dental pulp stem cells/progenitors. Cell Commun Signal 2014; 12:35. [PMID: 24885382 PMCID: PMC4062286 DOI: 10.1186/1478-811x-12-35] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 05/23/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Transcription factors have been implicated in regulating the differentiation of odontoblasts from dental pulp stem cells/progenitors (DPSCs/progenitors), but their regulatory network is not completely understood. RESULT New transcription factors that control the odontoblast differentiation of human DPSCs/progenitors were analyzed using a microarray. The result revealed bobby sox homolog (BBX) to be expressed most strongly during odontoblast differentiation. Validation using RT-PCR also revealed the strong expression of BBX during the odontoblast differentiation of DPSCs/progenitors. BBX expression was also detected in adult molar odontoblasts and other tissues, including the heart, kidney, testis, and bone marrow. To understand the role of BBX in odontoblast differentiation, BBX variant 1 and 2 cDNA were cloned and overexpressed in DPSCs/progenitors. The results showed that the overexpression of BBX cDNA in DPSCs/progenitors induced substantial mineralization and expression of the odontoblast marker genes, such as ALP, OPN, BSP, DMP1, and DSPP. The knockdown of BBX using shRNA, however, did not affect mineralization, but the expression of ALP and DSPP was decreased substantially. Meanwhile overexpression or knockdown of BBX did not modulate proliferation of DPSCs/progenitors. CONCLUSION Our results suggest that BBX plays an important role during the odontoblast differentiation of human DPSCs/progenitors.
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Affiliation(s)
| | | | | | - Eui Kyun Park
- Department of Oral Pathology and Regenerative Medicine, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-daero, Jung-gu, Daegu 700-412, Korea.
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25
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Zhang Y, Yao N, Wang F, Li W, Jiang S. A novel in situ self foaming method for the synthesis of porous calcium metaphosphate biomaterials. RSC Adv 2014. [DOI: 10.1039/c4ra11097h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Porous ceramics were synthesized using an in situ self-foaming method. The method can be fabricated a porous biomaterials without pore-forming agents. The method can overcome the shortcomings of the pore-forming agent method.
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Affiliation(s)
- Yin Zhang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009, China
- Nanjing Haoqi Advanced Materials Co., Ltd
- Nanjing, China
| | - Nengjian Yao
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009, China
| | - Fei Wang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009, China
| | - Wenda Li
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009, China
| | - Shengxiang Jiang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing 210009, China
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26
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Alfotawi R, Naudi K, Dalby MJ, Tanner KE, McMahon JD, Ayoub A. Assessment of cellular viability on calcium sulphate/hydroxyapatite injectable scaffolds. J Tissue Eng 2013; 4:2041731413509645. [PMID: 24555009 PMCID: PMC3927750 DOI: 10.1177/2041731413509645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 09/30/2013] [Indexed: 12/23/2022] Open
Abstract
Cements for maxillofacial reconstruction of jaw defects through calcification of rotated muscle have been tested. The objective of this study was to investigate the visibility of loading of two types of commercially available cements, Cerament(™) Spine Support and Cerament Bone Void Filler with mesenchymal cells and cytokines (bone morphogenetic protein) to act as a biomimetic scaffolding for future clinical application. Determination of basic biocompatibility (cell viability) using methyl thiazolyl tetrazolium and live/dead assay was carried out using MG-63 cells at various time points. Next, in order to inform potential subsequent in vivo experiments, a collagen tissue mimic was used for characterization of rabbit mesenchymal stromal cells using immunofluorescent cytoskeleton staining, and simultaneous and then sequential injection of Cerament Spine Support cement and cells into collagen gels. Results indicated that Cerament Spine Support was more biocompatible and that sequential injection of cement and then rabbit mesenchymal stromal cells into the tissue mimics is an optimal approach for clinical applications.
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Affiliation(s)
- Randa Alfotawi
- Glasgow Dental Hospital & School, University of Glasgow, Glasgow, UK
| | - Kurt Naudi
- Glasgow Dental Hospital & School, University of Glasgow, Glasgow, UK
| | - Matthew J Dalby
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | | | - Jeremy D McMahon
- Regional Maxillofacial Unit, Southern General Hospital, Glasgow, UK
| | - Ashraf Ayoub
- Glasgow Dental Hospital & School, University of Glasgow, Glasgow, UK
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27
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Cho IH, Lee JH, Song YG, Kim YM, Jeon SY. Evaluation on the efficacy and safety of calcium metaphosphate coated fixture. J Adv Prosthodont 2013; 5:172-8. [PMID: 23755344 PMCID: PMC3675291 DOI: 10.4047/jap.2013.5.2.172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 04/24/2013] [Accepted: 04/25/2013] [Indexed: 12/02/2022] Open
Abstract
PURPOSE The purpose of this study was to assess the difference in efficacy between calcium metaphosphate (CMP)-coated implant fixtures and conventional resorbable blasted media (RBM) processed implant fixtures. MATERIALS AND METHODS This study targeted 50 implants from 44 patients who visited Dankook University Dental Hospital. Implantations were done separately for RBM treated and CMP-coated implants, although their design was the same. Calcium metaphosphate has a quicker biodegradation process through hydrolysis compared to other phosphate calcium groups. For the first year of the implantation, the resorption volume of marginal bone analyzed via radiography and perio-test value were measured, under the check plan. Their analyses were composed of a non-inferiority trials test. A 95% level of reliability was used. RESULTS In the comparative analysis of the resorption volume of marginal bone and the perio-test value, no statistically significant difference was found between the CMP-coated implants and RBM implants. CONCLUSION One year after the implant placement, CMP-coated implants were found not to be inferior to the conventional RBM implants.
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Affiliation(s)
- In-Ho Cho
- Department of Prosthodontics, College of Dentistry, Dankook University, Cheonan, Republic of Korea
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28
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Xie H, Wang Q, Ye Q, Wan C, Li L. Application of K/Sr co-doped calcium polyphosphate bioceramic as scaffolds for bone substitutes. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1033-44. [PMID: 22311075 DOI: 10.1007/s10856-012-4556-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 01/11/2012] [Indexed: 02/05/2023]
Abstract
Ion doping is one of the most important methods to modify the properties of bioceramics for better biodegrade abilities, biomechanical properties, and biocompatibilities. This paper presents a novel ion doping method applied in calcium polyphosphate (CPP)-based bioceramic scaffolds substituted by potassium and strontium ions (K/Sr) to form (K/Sr-CPP) scaffolds for bone tissue regeneration. The microstructure and crystallization of the scaffolds were detected by scanning electron microscopy and X-ray diffraction. Compressive strength and degradation tests were assessed to evaluate the mechanical and chemical stabilities of K/Sr-CPP in vitro. The cell biocompatibility was measured with respect to the cytotoxicity of the extractions of scaffolds. Muscle pouches and bone implantation were performed to evaluate the biodegradability and osteoconductivity of the scaffolds. The results indicated that the obtained K/Sr-CPP scaffolds had a single beta-CPP phase. The unit cell volume and average grain size increased but the crystallization decreased after the ions were doped into the CPP structure. The K/Sr-CPP scaffolds yielded a higher compressive strength and a better degradation property than the pure CPP scaffold. The MTT assay and in vivo results reveal that the K/Sr-CPP scaffolds exhibited a better cell biocompatibility and a tissue biocompatibility than CPP and hydroxyapatite scaffolds. This study proves the potential applications of K/Sr-CPP scaffolds in bone repair.
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Affiliation(s)
- Huixu Xie
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
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29
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Acharya B, Chun SY, Kim SY, Moon C, Shin HI, Park EK. Surface immobilization of MEPE peptide onto HA/β-TCP ceramic particles enhances bone regeneration and remodeling. J Biomed Mater Res B Appl Biomater 2012; 100:841-9. [DOI: 10.1002/jbm.b.32648] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 10/03/2011] [Accepted: 10/09/2011] [Indexed: 01/18/2023]
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30
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Chun SY, Lee HJ, Choi YA, Kim KM, Baek SH, Park HS, Kim JY, Ahn JM, Cho JY, Cho DW, Shin HI, Park EK. Analysis of the Soluble Human Tooth Proteome and Its Ability to Induce Dentin/Tooth Regeneration. Tissue Eng Part A 2011; 17:181-91. [DOI: 10.1089/ten.tea.2010.0121] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- So Young Chun
- Department of Pathology and Regenerative Medicine, IHBR, JIRM, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Hyo Jung Lee
- Department of Pathology and Regenerative Medicine, IHBR, JIRM, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Young Ae Choi
- Department of Pathology and Regenerative Medicine, IHBR, JIRM, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Kyung Min Kim
- Department of Pathology and Regenerative Medicine, IHBR, JIRM, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Sang Heum Baek
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Hyo Sang Park
- Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Young Kim
- Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Jung-Mo Ahn
- Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Je-Yeol Cho
- Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Dong-Woo Cho
- Department of Mechanical Engineering, POSTECH, Pohang, Republic of Korea
| | - Hong-In Shin
- Department of Pathology and Regenerative Medicine, IHBR, JIRM, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Eui Kyun Park
- Department of Pathology and Regenerative Medicine, IHBR, JIRM, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
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Pak HS, Yeo IS, Yang JH. A histomorphometric study of dental implants with different surface characteristics. J Adv Prosthodont 2010; 2:142-7. [PMID: 21264193 PMCID: PMC3024504 DOI: 10.4047/jap.2010.2.4.142] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 11/15/2010] [Accepted: 12/16/2010] [Indexed: 11/08/2022] Open
Abstract
PURPOSE One of the major keys to achieve successful osseointegration of the implant is its surface properties. The aim of this study was to investigate the bone response to dental implants with different surface characteristics using the rabbit tibia model. Tricalcium phosphate (TCP) coated, anodic oxidized and turned (control) surfaces were compared. MATERIALS AND METHODS Seventy two implants were placed in the tibia of eighteen rabbits. Nine rabbits were sacrificed at 3 weeks of healing and the remaining nine were sacrificed at 6 weeks of healing. The bone-to-implant contact (BIC) and the bone volume density (BVD) were assessed by light microscope after 3 and 6 weeks of healing. RESULTS Statistical analysis showed that no significant differences in the BIC and BVD were observed between the different implant surfaces and the control group at 3 weeks and 6 weeks of healing. Data also suggested that the BVD of all the surfaces showed significant difference at 3 and 6 weeks. CONCLUSION The present study has showed that osseointegration occurred in all investigated types of surface-treated implants. In the current study all of the threads of the implants were observed to calculate BIC and BVD values (instead of choosing some of the threads from the bone cortex for example), which didn't make BIC or BVD percentage values better than in the control group, therefore the clinical relevance of these results remains to be shown.
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Affiliation(s)
- Hyun-Soon Pak
- Department of Prosthodontics, Graduate School, Seoul National University, Seoul, Korea
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Choi YA, Lim J, Kim KM, Acharya B, Cho JY, Bae YC, Shin HI, Kim SY, Park EK. Secretome Analysis of Human BMSCs and Identification of SMOC1 as an Important ECM Protein in Osteoblast Differentiation. J Proteome Res 2010; 9:2946-56. [DOI: 10.1021/pr901110q] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Young-Ae Choi
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Jiwon Lim
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Kyung Min Kim
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Bodhraj Acharya
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Je-Yoel Cho
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Yong-Chul Bae
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Hong-In Shin
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Shin-Yoon Kim
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
| | - Eui Kyun Park
- Department of Oral Pathology, School of Dentistry, BK21, IHBR, Kyungpook National University, Daegu, Korea, Department of Oral Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea, Department of Oral Anatomy and Neurobiology, School of Dentistry, Kyungpook National University Hospital, Daegu, Korea, and Department of Orthopaedic Surgery, Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Daegu, Korea
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Marinucci L, Balloni S, Becchetti E, Bistoni G, Calvi EM, Lumare E, Ederli F, Locci P. Effects of Hydroxyapatite and Biostite® on Osteogenic Induction of hMSC. Ann Biomed Eng 2010; 38:640-8. [DOI: 10.1007/s10439-009-9898-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Accepted: 12/30/2009] [Indexed: 10/20/2022]
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Thomas MV, Puleo DA. Calcium sulfate: Properties and clinical applications. J Biomed Mater Res B Appl Biomater 2009; 88:597-610. [DOI: 10.1002/jbm.b.31269] [Citation(s) in RCA: 211] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yeo IS, Han JS, Yang JH. Biomechanical and histomorphometric study of dental implants with different surface characteristics. J Biomed Mater Res B Appl Biomater 2009; 87:303-11. [PMID: 18435399 DOI: 10.1002/jbm.b.31104] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The aim of this study was to investigate the early bone response to the titanium dental implants with different surface characteristics using the rabbit tibia model. Calcium metaphosphate coated, anodic oxidized, hydroxyapatite particle-blasted, and turned (control) surfaces were compared. Surface topography was evaluated by field emission scanning electron microscope and optical interferometer. Eighteen rabbits received 72 implants in the tibia. Resonance frequency was analyzed every week for 6 weeks. Removal torque values were measured 2 and 6 weeks after placement. The implant-bone interfaces were directly observed by light microscope and bone-to-implant contact ratios were measured 2 and 6 weeks after insertion. All the surface-modified implants showed superior initial bone responses to the control. No significant differences were found among the surface-modified groups. Data suggest that various surface modification methods can provide favorable bone responses for early functioning and healing of dental implants.
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Affiliation(s)
- In-Sung Yeo
- Department of Dentistry, Seoul National University Bundang Hospital, Gyeonggi-do, South Korea
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Guillot PV, De Bari C, Dell'Accio F, Kurata H, Polak J, Fisk NM. Comparative osteogenic transcription profiling of various fetal and adult mesenchymal stem cell sources. Differentiation 2008; 76:946-57. [PMID: 18557767 DOI: 10.1111/j.1432-0436.2008.00279.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Human mesenchymal stem cells (MSC) from adult and fetal tissues are promising candidates for cell therapy but there is a need to identify the optimal source for bone regeneration. We have previously characterized MSC populations in first trimester fetal blood, liver, and bone marrow and we now evaluate their osteogenic differentiation potential in comparison to adult bone marrow MSC. Using quantitative real-time RT-PCR, we demonstrated that 16 osteogenic-specific genes (OC, ON, BSP, OP, Col1, PCE, Met2A, OPG, PHOS1, SORT, ALP, BMP2, CBFA1, OSX, NOG, IGFII) were expressed in both fetal and adult MSC under basal conditions and were up-regulated under osteogenic conditions both in vivo and during an in vitro 21-day time-course. However, under basal conditions, fetal MSC had higher levels of osteogenic gene expression than adult MSC. Upon osteogenic differentiation, fetal MSC produced more calcium in vitro and reached higher levels of osteogenic gene up-regulation in vivo and in vitro. Second, we observed a hierarchy within fetal samples, with fetal bone marrow MSC having greater osteogenic potential than fetal blood MSC, which in turn had greater osteogenic potential than fetal liver MSC. Finally, we found that the level of gene expression under basal conditions was positively correlated with both calcium secretion and gene expression after 21 days in osteogenic conditions. Our findings suggest that stem cell therapy for bone dysplasias such as osteogenesis imperfecta may benefit from preferentially using first trimester fetal blood or bone marrow MSC over fetal liver or adult bone marrow MSC.
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Affiliation(s)
- Pascale V Guillot
- Institute of Reproductive and Developmental Biology, Imperial College London, London, UK.
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Negroiu G, Piticescu RM, Chitanu GC, Mihailescu IN, Zdrentu L, Miroiu M. Biocompatibility evaluation of a novel hydroxyapatite-polymer coating for medical implants (in vitro tests). JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:1537-1544. [PMID: 17990076 DOI: 10.1007/s10856-007-3300-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2007] [Accepted: 10/02/2007] [Indexed: 05/25/2023]
Abstract
Nanocomposites consisting of hydroxyapatite (HA) and a sodium maleate copolymer (maleic polyelectrolyte), synthesized by hydrothermal method and deposited on titanium substrates by Matrix Assisted Pulsed Laser Evaporation (MAPLE) technique were tested for the biological properties. Coating bioanalysis was carried out by triple staining of actin, microtubules and nuclei followed by immunofluorescence microscopy. Within 24 h cells that occupied the biomaterial surface displayed the morphology and cytoskeleton pattern similar to the controls. Cells grown on nanocomposite coated surfaces had a higher proliferation rate than their counterparts grown on Ti coated with HA alone, indicating that maleic polyelectrolyte improved surface bio-adhesive characteristics. The capacity to induce cell attachment, spreading and proliferation demonstrated the potential of Ti coated with HA-polymer nanocomposites to be used as scaffolds in dental or orthopedic implantology.
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Affiliation(s)
- Gabriela Negroiu
- Institute of Biochemistry, Romanian Academy, Sector 6, Bucharest, Romania.
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Harris M, Doraiswamy A, Narayan R, Patz T, Chrisey D. Recent progress in CAD/CAM laser direct-writing of biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008. [DOI: 10.1016/j.msec.2007.04.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Fully Interconnected Globular Porous Biphasic Calcium Phosphate Ceramic Scaffold Facilitates Osteogenic Repair. ACTA ACUST UNITED AC 2007. [DOI: 10.4028/www.scientific.net/kem.361-363.119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An appropriate scaffold, which provides structural support for transplanted cells and acts as a vehicle for the delivery of biologically active molecules, is critical for tissue engineering. We developed a fully interconnected globular porous biphasic calcium phosphate ceramic scaffold by adopting a foaming method, and evaluated its efficiency as a bone substitute and a scaffold for bone tissue engineering by in vitro and in vivo biocompatible analysis and its osteogenic healing capacity in rat tibial bone defects. They have spherical pores averaging 400um in diameter and interconnecting interpores averaging 70um in diameter with average 85% porosity. They elicited no cytotoxicity and noxious effect on cellular proliferation and osteoblastic differentiation during the cell-scaffold construct formation. Also the bone defects grafted with fully interconnected globular porous biphasic calcium phosphate ceramic blocks revealed excellent bone healing within 3 weeks. These findings suggest that the fully interconnected porous biphasic calcium phosphate scaffold formed by the foaming method can be a promising bone substitute and a scaffold for bone tissue engineering.
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Wang FM, Qiu K, Hu T, Wan CX, Zhou XD, Gutmann JL. Biodegradable porous calcium polyphosphate scaffolds for the three-dimensional culture of dental pulp cells. Int Endod J 2006; 39:477-83. [PMID: 16674743 DOI: 10.1111/j.1365-2591.2006.01114.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
AIM To develop a three-dimensional culture model of human dental pulp cells (DPCs) with biodegradable porous calcium polyphosphate (CPP) scaffolds. METHODOLOGY Human DPCs were isolated from three donors. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay was used to evaluate the cytotoxicity of CPP compared with hydroxyapatite (HA) and beta-tricalcium phosphate (beta-TCP). Values were analysed using unpaired t-tests. Cells were seeded onto porous CPP scaffolds with pore sizes in the range of 200-300 microm. The nature of cellular adaptation in the three-dimensional culture model was then evaluated visually by scanning electronic microscopy (SEM) and confocal laser scanning microscopy (CLSM). The apoptotic property of cells on the scaffolds was also assessed by DNA staining with CLSM. RESULTS The cytotoxicity assay indicated that there was no significant difference between CPP and HA for each donor's original cells (P>0.05). Calcium polyphosphate had no cytotoxic effect on DPCs, whilst SEMs showed that cells successfully adhered to CPP scaffolds and spread amongst pores. On the cell surface, fine processes and matrix secretory granules were found. Confocal laser scanning microscopy showed that cells took on a three-dimensional structure with signs of vitality. CONCLUSION Porous CPP scaffolds are promising for the establishment of a three-dimensional culture model of DPCs.
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Affiliation(s)
- F-M Wang
- Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Shichuan University, Chengdu, China
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Whited BM, Skrtic D, Love BJ, Goldstein AS. Osteoblast response to zirconia-hybridized pyrophosphate-stabilized amorphous calcium phosphate. J Biomed Mater Res A 2006; 76:596-604. [PMID: 16278876 PMCID: PMC1477539 DOI: 10.1002/jbm.a.30573] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Calcium phosphate bioceramics, such as hydroxyapatite, have long been used as bone substitutes because of their proven biocompatibility and bone binding properties in vivo. Recently, a zirconia-hybridized pyrophosphate-stabilized amorphous calcium phosphate (Zr-ACP) has been synthesized, which is more soluble than hydroxyapatite and allows for controlled release of calcium and phosphate ions. These ions have been postulated to increase osteoblast differentiation and mineralization in vitro. The focus of this work is to elucidate the physicochemical properties of Zr-ACP and to measure cell response to Zr-ACP in vitro using a MC3T3-E1 mouse calvarial-derived osteoprogenitor cell line. Cells were cultured in osteogenic medium and mineral was added to culture at different stages in cell maturation. Culture in the presence of Zr-ACP showed significant increases in cell proliferation, alkaline phosphatase activity (ALP), and osteopontin (OPN) synthesis, whereas collagen synthesis was unaffected. In addition, calcium and phosphate ion concentrations and medium pH were found to transiently increase with the addition of Zr-ACP, and are hypothesized to be responsible for the osteogenic effect of Zr-ACP.
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Affiliation(s)
- Bryce M Whited
- School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0298, USA
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