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Hou W, Liu J, Wei W, Zhao Y, Wu X, Dai H. All-in-one strategy to develop a near-infrared triggered multifunctional bioactive magnesium phosphate bone cement for bone repair. Acta Biomater 2024; 182:111-125. [PMID: 38763407 DOI: 10.1016/j.actbio.2024.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/18/2024] [Accepted: 05/14/2024] [Indexed: 05/21/2024]
Abstract
Bone cement is widely used in clinical with optimistic filling and mechanical properties. However, the setting time of bone cement is difficult to accurately control, and the existing bone cements exhibit limited therapeutic functionalities. In response to these challenges, we designed and synthesized Nd-doped whitlockite (Nd-WH), endowing bone cement with photothermal-responsive and fluorescence imaging capabilities. The doping amount and photothermal properties of Nd-doped whitlockite were studied, and the composite bone cement was prepared. The results showed that the setting time of bone cement could be regulated by near infrared irradiation, and the multiple functions of promoting osteogenic differentiation, antibacterial and anti-tumor could be realized by adjusting the power and irradiation time of near infrared. By incorporating Nd-doped whitlockite and bone cement, we developed an all-in-one strategy to achieve setting time control, enhanced osteogenic ability, tumor cell clearance, bacterial clearance, and bone tissue regeneration. The optimized physical and mechanical properties of composite bone cement ensure adaptability and plasticity. In vitro and in vivo experiments validated the effectiveness of this bone cement platform for bone repair, tumor cell clearance and bacterial clearance. The universal methods to regulate the setting time and function of bone cement by photothermal effect has potential in orthopedic surgery and is expected to be a breakthrough in the field of bone defect repair. Further research and clinical validation are needed to ensure its safety, efficacy and sustainability. STATEMENT OF SIGNIFICANCE: Bone cement is a valuable clinical material. However, the setting time of bone cement is difficult to control, and the therapeutic function of existing bone cement is limited. Various studies have shown that the bone repair capacity of bone cements can be enhanced by synergistic stimulatory effects in vivo and ex vivo. Unfortunately, most of the existing photothermal conversion materials are non-degradable and poorly biocompatible. This study provides a bone-like photothermal conversion material with photothermal response and fluorescence imaging properties, and constructed a platform for integrated regulation of the setting time of bone cement and diversification of its functions. Therefore, it helps to design multi-functional bone repair materials that are more convenient and effective in clinical operation.
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Affiliation(s)
- Wen Hou
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan University of Technology, Wuhan 430070, China
| | - Jiawei Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan University of Technology, Wuhan 430070, China
| | - Wenying Wei
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan University of Technology, Wuhan 430070, China
| | - Yanan Zhao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan University of Technology, Wuhan 430070, China
| | - Xiaopei Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan University of Technology, Wuhan 430070, China; National energy key laboratory for new hydrogen-ammonia energy technologies, Foshan Xianhu Laboratory, Foshan 528200, China.
| | - Honglian Dai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Biomedical Materials and Engineering Research Center of Hubei Province, Wuhan University of Technology, Wuhan 430070, China; National energy key laboratory for new hydrogen-ammonia energy technologies, Foshan Xianhu Laboratory, Foshan 528200, China.
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2
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Hemmerlein E, Vorndran E, Schmitt AM, Feichtner F, Waselau AC, Meyer-Lindenberg A. In Vivo Investigation of 3D-Printed Calcium Magnesium Phosphate Wedges in Partial Load Defects. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2136. [PMID: 38730942 PMCID: PMC11085615 DOI: 10.3390/ma17092136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/26/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024]
Abstract
Bone substitutes are ideally biocompatible, osteoconductive, degradable and defect-specific and provide mechanical stability. Magnesium phosphate cements (MPCs) offer high initial stability and faster degradation compared to the well-researched calcium phosphate cements (CPCs). Calcium magnesium phosphate cements (CMPCs) should combine the properties of both and have so far shown promising results. The present study aimed to investigate and compare the degradation and osseointegration behavior of 3D powder-printed wedges of CMPC and MPC in vivo. The wedges were post-treated with phosphoric acid (CMPC) and diammonium hydrogen phosphate (MPC) and implanted in a partially loaded defect model in the proximal rabbit tibia. The evaluation included clinical, in vivo µ-CT and X-ray examinations, histology, energy dispersive X-ray analysis (EDX) and scanning electron microscopy (SEM) for up to 30 weeks. SEM analysis revealed a zone of unreacted material in the MPC, indicating the need to optimize the manufacturing and post-treatment process. However, all materials showed excellent biocompatibility and mechanical stability. After 24 weeks, they were almost completely degraded. The slower degradation rate of the CMPC corresponded more favorably to the bone growth rate compared to the MPC. Due to the promising results of the CMPC in this study, it should be further investigated, for example in defect models with higher load.
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Affiliation(s)
- Elke Hemmerlein
- Clinic for Small Animal Surgery and Reproduction, Ludwig Maximilians University Munich, 80539 Munich, Germany (A.-C.W.); (A.M.-L.)
| | - Elke Vorndran
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, 97070 Würzburg, Germany (A.-M.S.)
| | - Anna-Maria Schmitt
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, 97070 Würzburg, Germany (A.-M.S.)
| | - Franziska Feichtner
- Clinic for Small Animal Surgery and Reproduction, Ludwig Maximilians University Munich, 80539 Munich, Germany (A.-C.W.); (A.M.-L.)
| | - Anja-Christina Waselau
- Clinic for Small Animal Surgery and Reproduction, Ludwig Maximilians University Munich, 80539 Munich, Germany (A.-C.W.); (A.M.-L.)
| | - Andrea Meyer-Lindenberg
- Clinic for Small Animal Surgery and Reproduction, Ludwig Maximilians University Munich, 80539 Munich, Germany (A.-C.W.); (A.M.-L.)
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Zhao X, Zhuang Y, Cao Y, Cai F, Lv Y, Zheng Y, Yang J, Shi X. Electrospun Biomimetic Periosteum Capable of Controlled Release of Multiple Agents for Programmed Promoting Bone Regeneration. Adv Healthc Mater 2024; 13:e2303134. [PMID: 38348511 DOI: 10.1002/adhm.202303134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 01/29/2024] [Indexed: 05/08/2024]
Abstract
The effective repair of large bone defects remains a major challenge due to its limited self-healing capacity. Inspired by the structure and function of the natural periosteum, an electrospun biomimetic periosteum is constructed to programmatically promote bone regeneration using natural bone healing mechanisms. The biomimetic periosteum is composed of a bilayer with an asymmetric structure in which an aligned electrospun poly(ε-caprolactone)/gelatin/deferoxamine (PCL/GEL/DFO) layer mimics the outer fibrous layer of the periosteum, while a random coaxial electrospun PCL/GEL/aspirin (ASP) shell and PCL/silicon nanoparticles (SiNPs) core layer mimics the inner cambial layer. The bilayer controls the release of ASP, DFO, and SiNPs to precisely regulate the inflammatory, angiogenic, and osteogenic phases of bone repair. The random coaxial inner layer can effectively antioxidize, promoting cell recruitment, proliferation, differentiation, and mineralization, while the aligned outer layer can promote angiogenesis and prevent fibroblast infiltration. In particular, different stages of bone repair are modulated in a rat skull defect model to achieve faster and better bone regeneration. The proposed biomimetic periosteum is expected to be a promising candidate for bone defect healing.
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Affiliation(s)
- Xingkai Zhao
- College of Biological Science and Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
| | - Yu Zhuang
- College of Biological Science and Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
| | - Yongjian Cao
- Fujian Key Laboratory of Medical Instrument and Pharmaceutical Technology, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
| | - Fengying Cai
- College of Biological Science and Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
| | - Yicheng Lv
- College of Biological Science and Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
| | - Yunquan Zheng
- Fujian Key Laboratory of Medical Instrument and Pharmaceutical Technology, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
| | - Jianmin Yang
- College of Biological Science and Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
- Fujian Key Laboratory of Medical Instrument and Pharmaceutical Technology, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
| | - Xianai Shi
- College of Biological Science and Engineering, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
- Fujian Key Laboratory of Medical Instrument and Pharmaceutical Technology, Fuzhou University, No. 2 Xueyuan Road, Fuzhou, 350108, China
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4
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Zhang Z, Huang C, Guan S, Wang L, Yin H, Yin J, Liu J, Wu J. Hybrid gelatin-ascorbyl phosphate scaffolds accelerate diabetic wound healing via ROS scavenging, angiogenesis and collagen remodeling. BIOMATERIALS ADVANCES 2024; 158:213779. [PMID: 38277902 DOI: 10.1016/j.bioadv.2024.213779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/26/2023] [Accepted: 01/17/2024] [Indexed: 01/28/2024]
Abstract
Skin wound healing, particularly diabetic wound healing, is challenging in clinical management. Impaired wound healing is associated with persistent oxidative stress, altered inflammatory responses, unsatisfactory angiogenesis and epithelialization. Magnesium ascorbyl phosphate (MAP), which is an ascorbic acid derivative and active ingredient in cosmetics, has been reported to scavenge reactive oxygen species (ROS), and is considered a potential therapeutic agent for diabetic wounds. Herein, we report a hybrid gelatin-MAP scaffolds that can reduces oxidative stress damage, enhances angiogenesis and collagen remodeling to accelerate diabetic wound repair. Preliminary insights based on network pharmacology indicate that MAP may accelerate wound repair through multiple biological pathways, including extracellular matrix remodeling and anti-apoptosis. In vitro studies showed that the hybrid hydrogel scaffold had suitable mechanical properties, excellent biocompatibility and bioactivity. Further animal experiments demonstrated that the hydrogel accelerated full-thickness wound repair in diabetic mice (repair rate MAP vs Control=91.791±3.306 % vs 62.962±6.758 %) through antioxidant, neuroangiogenesis, collagen remodeling, and up-regulated the expression of the related factors COL-1, CD31, VEGF, and CGRP. Overall, we developed a bioactive hybrid hydrogel encapsulating MAP that synergistically promotes diabetic wound repair through multiple biological effects. This potentially integrated therapeutic scaffold may enrich future surgical approaches for treating diabetic wounds.
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Affiliation(s)
- Zhen Zhang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Chunlin Huang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Shiyao Guan
- Bioscience and Biomedical Engineering Thrust, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511400, China
| | - Liying Wang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Hanxiao Yin
- Department of Musculoskeletal Oncology, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Junqiang Yin
- Department of Musculoskeletal Oncology, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China.
| | - Jie Liu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
| | - Jun Wu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China; Bioscience and Biomedical Engineering Thrust, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511400, China; Division of Life Science, The Hong Kong University of Science and Technology, 999077, Hong Kong.
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Leng D, Fu Q, Ge Y, He C, Lv Y, Li X. Effect of K + Diffusion on Hydration of Magnesium Potassium Phosphate Cement with Different Mg/P Ratios: Experiments and Molecular Dynamics Simulation Calculations. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1151. [PMID: 38473622 DOI: 10.3390/ma17051151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 02/20/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024]
Abstract
Magnesium potassium phosphate cement (MKPC) is formed on the basis of acid-base reaction between dead burnt MgO and KH2PO4 in aqueous solution with K-struvite as the main cementitious phase. Due to the unique characteristics of these cements, they are suitable for special applications, especially the immobilization of radioactive metal cations and road repair projects at low temperature. However, there are few articles about the hydration mechanism of MKPC. In this study, the types, proportions and formation mechanism of MKPC crystalline phases under different magnesium to phosphorus (Mg/P) ratios were studied by means of AAS, ICP-OES, SEM, EDS and XRD refinement methods. Corresponding MD simulation works were used to explain the hydration mechanism. This study highlights the fact that crystalline phases distribution of MKPC could be adjusted and controlled by different Mg/P ratios for the design of the MKPC, and the key factor is the kinetic of K+.
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Affiliation(s)
- Difei Leng
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122 at Luoshi Road, Wuhan 430070, China
| | - Qiuyan Fu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122 at Luoshi Road, Wuhan 430070, China
| | - Yunlu Ge
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122 at Luoshi Road, Wuhan 430070, China
| | - Chenhao He
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122 at Luoshi Road, Wuhan 430070, China
| | - Yang Lv
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122 at Luoshi Road, Wuhan 430070, China
| | - Xiangguo Li
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122 at Luoshi Road, Wuhan 430070, China
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Schröter L, Kaiser F, Küppers O, Stein S, Krüger B, Wohlfahrt P, Geroneit I, Stahlhut P, Gbureck U, Ignatius A. Improving bone defect healing using magnesium phosphate granules with tailored degradation characteristics. Dent Mater 2024; 40:508-519. [PMID: 38199893 DOI: 10.1016/j.dental.2023.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 12/17/2023] [Accepted: 12/19/2023] [Indexed: 01/12/2024]
Abstract
OBJECTIVES Dental implant placement frequently requires preceding bone augmentation, for example, with hydroxyapatite (HA) or β-tricalcium phosphate (β-TCP) granules. However, HA is degraded very slowly in vivo and for β-TCP inconsistent degradation profiles from too rapid to rather slow are reported. To shorten the healing time before implant placement, rapidly resorbing synthetic materials are of great interest. In this study, we investigated the potential of magnesium phosphates in granular form as bone replacement materials. METHODS Spherical granules of four different materials were prepared via an emulsion process and investigated in trabecular bone defects in sheep: struvite (MgNH4PO4·6H2O), K-struvite (MgKPO4·6H2O), farringtonite (Mg3(PO4)2) and β-TCP. RESULTS All materials except K-struvite exhibited promising support of bone regeneration, biomechanical properties and degradation. Struvite and β-TCP granules degraded at a similar rate, with a relative granules area of 29% and 30% of the defect area 4 months after implantation, respectively, whereas 18% was found for farringtonite. Only the K-struvite granules degraded too rapidly, with a relative granules area of 2% remaining, resulting in initial fibrous tissue formation and intermediate impairment of biomechanical properties. SIGNIFICANCE We demonstrated that the magnesium phosphates struvite and farringtonite have a comparable or even improved degradation behavior in vivo compared to β-TCP. This emphasizes that magnesium phosphates may be a promising alternative to established calcium phosphate bone substitute materials.
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Affiliation(s)
- Lena Schröter
- Institute for Orthopaedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081 Ulm, Germany
| | - Friederike Kaiser
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, D-97070 Würzburg, Germany
| | - Oliver Küppers
- Institute for Orthopaedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081 Ulm, Germany
| | - Svenja Stein
- Institute for Orthopaedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081 Ulm, Germany
| | - Benjamin Krüger
- Institute for Orthopaedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081 Ulm, Germany
| | - Philipp Wohlfahrt
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, D-97070 Würzburg, Germany
| | - Isabel Geroneit
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, D-97070 Würzburg, Germany
| | - Philipp Stahlhut
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, D-97070 Würzburg, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, D-97070 Würzburg, Germany.
| | - Anita Ignatius
- Institute for Orthopaedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081 Ulm, Germany
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Tian Y, Sun R, Li Y, Liu P, Fan B, Xue Y. Research progress on the application of magnesium phosphate bone cement in bone defect repair: A review. Biomed Mater Eng 2024; 35:265-278. [PMID: 38728179 DOI: 10.3233/bme-230164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
BACKGROUND Bone defects arising from diverse causes, such as traffic accidents, contemporary weapon usage, and bone-related disorders, present significant challenges in clinical treatment. Prolonged treatment cycles for bone defects can result in complications, impacting patients' overall quality of life. Efficient and timely repair of bone defects is thus a critical concern in clinical practice. OBJECTIVE This study aims to assess the scientific progress and achievements of magnesium phosphate bone cement (MPC) as an artificial bone substitute material. Additionally, the research seeks to explore the future development path and clinical potential of MPC bone cement in addressing challenges associated with bone defects. METHODS The study comprehensively reviews MPC's performance, encompassing e.g. mechanical properties, biocompatibility, porosity, adhesion and injectability. Various modifiers are also considered to broaden MPC's applications in bone tissue engineering, emphasizing drug-loading performance and antibacterial capabilities, which meet clinical diversification requirements. RESULTS In comparison to alternatives such as autogenous bone transplantation, allograft, polymethyl methacrylate (PMMA), and calcium phosphate cement (CPC), MPC emerges as a promising solution for bone defects. It addresses limitations associated with these alternatives, such as immunological rejection and long-term harm to patients. MPC can control heat release during the curing process, exhibits superior mechanical strength, and has the capacity to stimulate new bone growth. CONCLUSION MPC stands out as an artificial bone substitute with appropriate mechanical strength, rapid degradation, non-toxicity, and good biocompatibility, facilitating bone repair and regeneration. Modification agents can enhance its clinical versatility. Future research should delve into its mechanical properties and formulations, expanding clinical applications to create higher-performing and more medically valuable alternatives in bone defect repair.
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Affiliation(s)
- Yongzheng Tian
- 940 Hospital of People's Liberation Army Joint Service Support Force, Lanzhou, China
- Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Ruilong Sun
- 940 Hospital of People's Liberation Army Joint Service Support Force, Lanzhou, China
- Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Yunfei Li
- 940 Hospital of People's Liberation Army Joint Service Support Force, Lanzhou, China
- Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Peng Liu
- 940 Hospital of People's Liberation Army Joint Service Support Force, Lanzhou, China
- Gansu University of Traditional Chinese Medicine, Lanzhou, China
| | - Bo Fan
- 940 Hospital of People's Liberation Army Joint Service Support Force, Lanzhou, China
| | - Yun Xue
- 940 Hospital of People's Liberation Army Joint Service Support Force, Lanzhou, China
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Gelli R, Tonelli M, Ridi F, Terefinko D, Dzimitrowicz A, Pohl P, Bielawska-Pohl A, Jamroz P, Klimczak A, Bonini M. Effect of Atmospheric Pressure Plasma Jet Treatments on Magnesium Phosphate Cements: Performance, Characterization, and Applications. ACS Biomater Sci Eng 2023; 9:6632-6643. [PMID: 37982239 PMCID: PMC10716815 DOI: 10.1021/acsbiomaterials.3c00817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/12/2023] [Accepted: 10/27/2023] [Indexed: 11/21/2023]
Abstract
Atmospheric pressure plasma treatments are nowadays gaining importance to improve the performance of biomaterials in the orthopedic field. Among those, magnesium phosphate-based cements (MPCs) have recently shown attractive features as bone repair materials. The effect of plasma treatments on such cements, which has not been investigated so far, could represent an innovative strategy to modify MPCs' physicochemical properties and to tune their interaction with cells. MPCs were prepared and treated for 5, 7.5, and 10 min with a cold atmospheric pressure plasma jet. The reactive nitrogen and oxygen species formed during the treatment were characterized. The surfaces of MPCs were studied in terms of the phase composition, morphology, and topography. After a preliminary test in simulated body fluid, the proliferation, adhesion, and osteogenic differentiation of human mesenchymal cells on MPCs were assessed. Plasma treatments induce modifications in the relative amounts of struvite, newberyite, and farringtonite on the surfaces on MPCs in a time-dependent fashion. Nonetheless, all investigated scaffolds show a good biocompatibility and cell adhesion, also supporting osteogenic differentiation of mesenchymal cells.
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Affiliation(s)
- Rita Gelli
- Department
of Chemistry “Ugo Schiff” and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
| | - Monica Tonelli
- Department
of Chemistry “Ugo Schiff” and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
| | - Francesca Ridi
- Department
of Chemistry “Ugo Schiff” and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
| | - Dominik Terefinko
- Department
of Analytical Chemistry and Chemical Metallurgy, Wroclaw University of Science and Technology, Faculty of Chemistry, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
| | - Anna Dzimitrowicz
- Department
of Analytical Chemistry and Chemical Metallurgy, Wroclaw University of Science and Technology, Faculty of Chemistry, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
| | - Pawel Pohl
- Department
of Analytical Chemistry and Chemical Metallurgy, Wroclaw University of Science and Technology, Faculty of Chemistry, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
| | - Aleksandra Bielawska-Pohl
- Hirszfeld
Institute of Immunology and Experimental Therapy, Polish Academy of
Sciences, The Laboratory of Biology of Stem
and Neoplastic Cells, 12 R. Weigla, 53-114 Wroclaw, Poland
| | - Piotr Jamroz
- Department
of Analytical Chemistry and Chemical Metallurgy, Wroclaw University of Science and Technology, Faculty of Chemistry, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
| | - Aleksandra Klimczak
- Hirszfeld
Institute of Immunology and Experimental Therapy, Polish Academy of
Sciences, The Laboratory of Biology of Stem
and Neoplastic Cells, 12 R. Weigla, 53-114 Wroclaw, Poland
| | - Massimo Bonini
- Department
of Chemistry “Ugo Schiff” and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
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Wekwejt M, Khamenka M, Ronowska A, Gbureck U. Dual-Setting Bone Cement Based On Magnesium Phosphate Modified with Glycol Methacrylate Designed for Biomedical Applications. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55533-55544. [PMID: 38058111 DOI: 10.1021/acsami.3c14491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Magnesium phosphate cement (MPC) is a suitable alternative for the currently used calcium phosphates, owing to beneficial properties like favorable resorption rate, fast hardening, and higher compressive strength. However, due to insufficient mechanical properties and high brittleness, further improvement is still expected. In this paper, we reported the preparation of a novel type of dual-setting cement based on MPC with poly(2-hydroxyethyl methacrylate) (pHEMA). The aim of our study was to evaluate the effect of HEMA addition, especially its concentration and premix time, on the selected properties of the composite. Several beneficial effects were found: better formability, shortened setting time, and improvement of mechanical strengths. The developed cements were hardening in ∼16-21 min, consisted of well-crystallized phases and polymerized HEMA, had porosity between ∼2-11%, degraded slowly by ∼0.1-4%/18 days, their wettability was ∼20-30°, they showed compressive and bending strength between ∼45-73 and 13-20 MPa, respectively, and, finally, their Young's Modulus was close to ∼2.5-3.0 GPa. The results showed that the optimal cement composition is MPC+15%HEMA and 4 min of polymer premixing time. Overall, our research suggested that this developed cement may be used in various biomedical applications.
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Affiliation(s)
- Marcin Wekwejt
- Biomaterials Technology Department, Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, G. Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
| | - Maryia Khamenka
- Scientific Club "Materials in Medicine", Advanced Materials Centre, Gdańsk University of Technology, G. Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
| | - Anna Ronowska
- Chair of Clinical Biochemistry, Department of Laboratory Medicine, Medical University of Gdańsk, 2x, M. Skłodowskiej-Curie 3a Street, 80-210 Gdańsk, Poland
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2 Street, D-97070 Würzburg, Germany
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10
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Schröter L, Kaiser F, Preißler AL, Wohlfahrt P, Küppers O, Gbureck U, Ignatius A. Ready-To-Use and Rapidly Biodegradable Magnesium Phosphate Bone Cement: In Vivo Evaluation in Sheep. Adv Healthc Mater 2023; 12:e2300914. [PMID: 37224104 DOI: 10.1002/adhm.202300914] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/16/2023] [Indexed: 05/26/2023]
Abstract
In clinical practice, hydroxyapatite (HA) cements for bone defect treatment are frequently prepared by mixing a powder component and a liquid component shortly before implantation in the operation theater, which is time-consuming and error-prone. In addition, HA cements are only slightly resorbed, that is, cement residues can still be found in the bone years after implantation. Here, these challenges are addressed by a prefabricated magnesium phosphate cement paste based on glycerol, which is ready-to-use and can be directly applied during surgery. By using a trimodal particle size distribution (PSD), the paste is readily injectable and exhibits a compressive strength of 9-14 MPa after setting. Struvite (MgNH4 PO4 ·6H2 O), dittmarite (MgNH4 PO4 ·H2 O), farringtonite (Mg3 (PO4 )2 ), and newberyite (MgHPO4 ·3H2 O) are the mineral phases present in the set cement. The paste developed here features a promising degradation of 37% after four months in an ovine implantation model, with 25% of the implant area being newly formed bone. It is concluded that the novel prefabricated paste improves application during surgery, has a suitable degradation rate, and supports bone regeneration.
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Affiliation(s)
- Lena Schröter
- Institute for Orthopedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081, Ulm, Germany
| | - Friederike Kaiser
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, D-97070, Würzburg, Germany
| | - Anna-Lena Preißler
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, D-97070, Würzburg, Germany
| | - Philipp Wohlfahrt
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, D-97070, Würzburg, Germany
| | - Oliver Küppers
- Institute for Orthopedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081, Ulm, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Pleicherwall 2, D-97070, Würzburg, Germany
| | - Anita Ignatius
- Institute for Orthopedic Research and Biomechanics, Ulm University Medical Center, Helmholtzstraße 14, D-89081, Ulm, Germany
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11
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He F, Yuan X, Fu W, Huang W, Chen T, Feng S, Wang H, Ye J. Preparation of lithium-containing magnesium phosphate-based composite ceramics having high compressive strength, osteostimulation and proangiogenic effects. Biomed Mater 2023; 18:065008. [PMID: 37703901 DOI: 10.1088/1748-605x/acf985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/13/2023] [Indexed: 09/15/2023]
Abstract
Fairly high concentrations of magnesium and lithium are conducive to improving the osteogenic and angiogenic capacities. In the current study, lithium-containing magnesium phosphate-based ceramics (AMP/LMPGs) were prepared from amorphous magnesium phosphate (AMP) at a low sintering temperature (650 °C), and the lithium/magnesium-containing phosphate glasses (LMPGs) were utilized as sintering additives. During the sintering procedure of AMP/LMPGs, the AMP reacted with LMPGs, producing new compounds. The AMP/LMPGs displayed nano-size grains and plentiful micropores. The addition of LMPGs noticeably increased the porosity as well as compressive strength of the AMP/LMPGs ceramics. The AMP/LMPGs sustainedly released Mg, P and Li ions, forming Mg-rich ionic microenvironment, which ameliorated cellular proliferation, osteogenic differentiation and proangiogenic capacities. The AMP/LMPGs ceramics with considerably high compressive strength, osteostimulation and proangiogenic effects were expected to efficiently regenerate the bone defects.
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Affiliation(s)
- Fupo He
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
| | - Xinyuan Yuan
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Wenhao Fu
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
| | - Wenhao Huang
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
| | - Tengyun Chen
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
| | - Songheng Feng
- School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
| | - Huaiyu Wang
- Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, People's Republic of China
| | - Jiandong Ye
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
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12
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Kaiser F, Schröter L, Wohlfahrt P, Geroneit I, Murek J, Stahlhut P, Weichhold J, Ignatius A, Gbureck U. Exploring the potential of magnesium oxychloride, an amorphous magnesium phosphate, and newberyite as possible bone cement candidates. J Biomater Appl 2023; 38:438-454. [PMID: 37525613 PMCID: PMC10494481 DOI: 10.1177/08853282231190908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Magnesium phosphate-based bone cements, particularly struvite (MgNH4PO4∙6H2O)-forming cements, have attracted increased scientific interest in recent years because they exhibit similar biocompatibility to hydroxyapatite while degrading much more rapidly in vivo. However, other magnesium-based minerals which might be promising are, to date, little studied. Therefore, in this study, we investigated three magnesium-based bone cements: a magnesium oxychloride cement (Mg3(OH)5Cl∙4H2O), an amorphous magnesium phosphate cement based on Mg3(PO4)2, MgO, and NaH2PO4, and a newberyite cement (MgHPO4·3H2O). Because it is not sufficiently clear from the literature to what extent these cements are suitable for clinical use, all of them were characterized and optimized regarding setting time, setting temperature, compressive strength and passive degradation in phosphate-buffered saline. Because the in vitro properties of the newberyite cement were most promising, it was orthotopically implanted into a partially weight-bearing tibial bone defect in sheep. The cement exhibited excellent biocompatibility and degraded more rapidly compared to a hydroxyapatite reference cement; after 4 months, 18% of the cement was degraded. We conclude that the newberyite cement was the most promising candidate of the investigated cements and has clear advantages over calcium phosphate cements, especially in terms of setting time and degradation behavior.
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Affiliation(s)
- Friederike Kaiser
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Lena Schröter
- Institute of Orthopedic Research and Biomechanics, Ulm University Medical Center, Ulm, Germany
| | - Philipp Wohlfahrt
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Isabel Geroneit
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Jérôme Murek
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Philipp Stahlhut
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Jan Weichhold
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
| | - Anita Ignatius
- Institute of Orthopedic Research and Biomechanics, Ulm University Medical Center, Ulm, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University Hospital Würzburg, Würzburg, Germany
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13
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Gelli R, Ridi F. An Overview of Magnesium-Phosphate-Based Cements as Bone Repair Materials. J Funct Biomater 2023; 14:424. [PMID: 37623668 PMCID: PMC10455751 DOI: 10.3390/jfb14080424] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/09/2023] [Accepted: 08/11/2023] [Indexed: 08/26/2023] Open
Abstract
In the search for effective biomaterials for bone repair, magnesium phosphate cements (MPCs) are nowadays gaining importance as bone void fillers thanks to their many attractive features that overcome some of the limitations of the well-investigated calcium-phosphate-based cements. The goal of this review was to highlight the main properties and applications of MPCs in the orthopedic field, focusing on the different types of formulations that have been described in the literature, their main features, and the in vivo and in vitro response towards them. The presented results will be useful to showcase the potential of MPCs in the orthopedic field and will suggest novel strategies to further boost their clinical application.
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Affiliation(s)
| | - Francesca Ridi
- Department of Chemistry “Ugo Schiff” and CSGI Consortium, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy;
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14
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Krokhicheva PA, Goldberg MA, Fomin AS, Khayrutdinova DR, Antonova OS, Baikin AS, Leonov AV, Merzlyak EM, Mikheev IV, Kirsanova VA, Sviridova IK, Akhmedova SA, Sergeeva NS, Barinov SM, Komlev VS. Zn-Doped Calcium Magnesium Phosphate Bone Cement Based on Struvite and Its Antibacterial Properties. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4824. [PMID: 37445137 DOI: 10.3390/ma16134824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/24/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023]
Abstract
The development of magnesium calcium phosphate bone cements (MCPCs) has garnered substantial attention. MCPCs are bioactive and biodegradable and have appropriate mechanical and antimicrobial properties for use in reconstructive surgery. In this study, the cement powders based on a (Ca + Mg)/P = 2 system doped with Zn2+ at 0.5 and 1.0 wt.% were obtained and investigated. After mixing with a cement liquid, the structural and phase composition, morphology, chemical structure, setting time, compressive strength, degradation behavior, solubility, antibacterial activities, and in vitro behavior of the cement materials were examined. A high compressive strength of 48 ± 5 MPa (mean ± SD) was achieved for the cement made from Zn2+ 1.0 wt.%-substituted powders. Zn2+ introduction led to antibacterial activity against Staphylococcus aureus and Escherichia coli strains, with an inhibition zone diameter of up to 8 mm. Biological assays confirmed that the developed cement is cytocompatible and promising as a potential bone substitute in reconstructive surgery.
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Affiliation(s)
- Polina A Krokhicheva
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Margarita A Goldberg
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Alexander S Fomin
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Dinara R Khayrutdinova
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Olga S Antonova
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Alexander S Baikin
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Aleksander V Leonov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Ekaterina M Merzlyak
- Department of Molecular Technologies, Pirogov Russian National Research Medical University, Moscow 117997, Russia
| | - Ivan V Mikheev
- Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Valentina A Kirsanova
- P.A. Hertsen Moscow Oncology Research Institute-Branch of National Medical Research Radiological Centre Affiliated with Ministry of Health of Russian Federation, 2nd Botkinsky Pr. 3, Moscow 125284, Russia
| | - Irina K Sviridova
- P.A. Hertsen Moscow Oncology Research Institute-Branch of National Medical Research Radiological Centre Affiliated with Ministry of Health of Russian Federation, 2nd Botkinsky Pr. 3, Moscow 125284, Russia
| | - Suraya A Akhmedova
- P.A. Hertsen Moscow Oncology Research Institute-Branch of National Medical Research Radiological Centre Affiliated with Ministry of Health of Russian Federation, 2nd Botkinsky Pr. 3, Moscow 125284, Russia
| | - Natalia S Sergeeva
- P.A. Hertsen Moscow Oncology Research Institute-Branch of National Medical Research Radiological Centre Affiliated with Ministry of Health of Russian Federation, 2nd Botkinsky Pr. 3, Moscow 125284, Russia
| | - Sergey M Barinov
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
| | - Vladimir S Komlev
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow 119334, Russia
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15
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Zhang R, Hou Y, Sun L, Liu X, Zhao Y, Zhang Q, Zhang Y, Wang L, Li R, Wang C, Wu X, Li B. Recent advances in carbon dots: synthesis and applications in bone tissue engineering. NANOSCALE 2023; 15:3106-3119. [PMID: 36723029 DOI: 10.1039/d2nr05951g] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Bone tissue engineering (BTE), based on the perfect combination of seed cells, scaffold materials and growth factors, has shown unparalleled potential in the treatment of bone defects and related diseases. As the site of cell attachment, proliferation and differentiation, scaffolds composed of biomaterials play a crucial role in BTE. Over the past years, carbon dots (CDs), a new type of carbon-based nanomaterial, have attracted extensive research attention due to their good biocompatibility, unique optical properties, and abundant functional groups. This paper reviews recent research progress in the use of CDs in the field of BTE. Firstly, different preparation methods of CDs are summarized. Then, the properties and categories of CDs applied in BTE are described in detail. Subsequently, the applications of CDs in BTE, including osteogenesis, fluorescence tracing, phototherapy and antibacterial activity, are presented. Finally, the challenges and future perspectives of CDs in BTE are briefly discussed to give a comprehensive picture of CDs. This review provides a theoretical basis and advanced design strategies for the application of CDs in BTE.
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Affiliation(s)
- Ran Zhang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Yuxi Hou
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Lingxiang Sun
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Xiaoming Liu
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Yifan Zhao
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Qingmei Zhang
- Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, China
| | - Yanjie Zhang
- Research Institute of Photonics, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Lu Wang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Ran Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Chunfang Wang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Xiuping Wu
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
| | - Bing Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, Shanxi, China.
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan 030001, Shanxi, China
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16
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Kowalewicz K, Waselau AC, Feichtner F, Schmitt AM, Brückner M, Vorndran E, Meyer-Lindenberg A. Comparison of degradation behavior and osseointegration of 3D powder-printed calcium magnesium phosphate cement scaffolds with alkaline or acid post-treatment. Front Bioeng Biotechnol 2022; 10:998254. [PMID: 36246367 PMCID: PMC9554004 DOI: 10.3389/fbioe.2022.998254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
Due to the positive effects of magnesium substitution on the mechanical properties and the degradation rate of the clinically well-established calcium phosphate cements (CPCs), calcium magnesium phosphate cements (CMPCs) are increasingly being researched as bone substitutes. A post-treatment alters the materials’ physical properties and chemical composition, reinforcing the structure and modifying the degradation rate. By alkaline post-treatment with diammonium hydrogen phosphate (DAHP, (NH4)2HPO4), the precipitation product struvite is formed, while post-treatment with an acidic phosphate solution [e.g., phosphoric acid (PA, H3PO4)] results in precipitation of newberyite and brushite. However, little research has yet been conducted on newberyite as a bone substitute and PA post-treatment of CMPCs has not been described in the accessible literature so far. Therefore, in the present study, the influence of an alkaline (DAHP) or acid (PA) post-treatment on the biocompatibility, degradation behavior, and osseointegration of cylindrical scaffolds (h = 5.1 mm, Ø = 4.2 mm) produced from the ceramic cement powder Ca0.75Mg2.25(PO4)2 by the advantageous manufacturing technique of three-dimensional (3D) powder printing was investigated in vivo. Scaffolds of the material groups Mg225d (DAHP post-treatment) and Mg225p (PA post-treatment) were implanted into the cancellous part of the lateral femoral condyles in rabbits. They were evaluated up to 24 weeks by regular clinical, X-ray, micro-computed tomographic (µCT), and histological examinations as well as scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) analysis and compared with tricalcium phosphate (TCP). All materials showed excellent biocompatibility and rapid osseointegration. While TCP degraded only slightly, the CMPCs showed almost complete degradation. Mg225d demonstrated significantly faster loss of form and demarcability from surrounding bone, scaffold volume reduction, and significantly greater degradation on the side towards the bone marrow than to the cortex than Mg225p. Simultaneously, numerous bone trabeculae have grown into the implantation site. While these were mostly located on the side towards the cortex in Mg225d, they were more evenly distributed in Mg225p and showed almost the same structural characteristics as physiological bone after 24 weeks in Mg225p. Based on these results, the acid post-treated 3D powder-printed Mg225p is a promising degradable bone substitute that should be further investigated.
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Affiliation(s)
- Katharina Kowalewicz
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Anja-Christina Waselau
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Franziska Feichtner
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Anna-Maria Schmitt
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Manuel Brückner
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Elke Vorndran
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Andrea Meyer-Lindenberg
- Clinic for Small Animal Surgery and Reproduction, Ludwig-Maximilians-University of Munich, Munich, Germany
- *Correspondence: Andrea Meyer-Lindenberg,
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