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Mangia LHR, Ferraz HC, Pinto JC. Stabilization of Aqueous MMA Emulsions Using Mixtures of Surfactants and Implications on MMA Miniemulsion Polymerizations. MACROMOL REACT ENG 2022. [DOI: 10.1002/mren.202200036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lys Hamond Regua Mangia
- Universidade Federal do Rio de Janeiro, Programa de Engenharia Química / COPPE, Cidade Universitária CP:68502 Rio de Janeiro RJ 21941‐972 Brazil
| | - Helen Conceição Ferraz
- Universidade Federal do Rio de Janeiro, Programa de Engenharia Química / COPPE, Cidade Universitária CP:68502 Rio de Janeiro RJ 21941‐972 Brazil
| | - José Carlos Pinto
- Universidade Federal do Rio de Janeiro, Programa de Engenharia Química / COPPE, Cidade Universitária CP:68502 Rio de Janeiro RJ 21941‐972 Brazil
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Robo C, Wenner D, Ubhayasekera SJKA, Hilborn J, Öhman-Mägi C, Persson C. Functional Properties of Low-Modulus PMMA Bone Cements Containing Linoleic Acid. J Funct Biomater 2021; 12:5. [PMID: 33477310 PMCID: PMC7839050 DOI: 10.3390/jfb12010005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 11/16/2022] Open
Abstract
Acrylic bone cements modified with linoleic acid are a promising low-modulus alternative to traditional high-modulus bone cements. However, several key properties remain unexplored, including the effect of autoclave sterilization and the potential use of low-modulus cements in other applications than vertebral augmentation. In this work, we evaluate the effect of sterilization on the structure and stability of linoleic acid, as well as in the handling properties, glass transition temperature, mechanical properties, and screw augmentation potential of low-modulus cement containing the fatty acid. Neither 1H NMR nor SFC-MS/MS analysis showed any detectable differences in autoclaved linoleic acid compared to fresh one. The peak polymerization temperature of the low-modulus cement was much lower (28-30 °C) than that of the high-modulus cement (67 °C), whereas the setting time remained comparable (20-25 min). The Tg of the low-modulus cement was lower (75-78 °C) than that of the high-stiffness cement (103 °C). It was shown that sterilization of linoleic acid by autoclaving did not significantly affect the functional properties of low-modulus PMMA bone cement, making the component suitable for sterile production. Ultimately, the low-modulus cement exhibited handling and mechanical properties that more closely match those of osteoporotic vertebral bone with a screw holding capacity of under 2000 N, making it a promising alternative for use in combination with orthopedic hardware in applications where high-stiffness augmentation materials can result in undesired effects.
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Affiliation(s)
- Céline Robo
- Department of Materials Science and Engineering, Division of Applied Materials Science, Uppsala University, 751 21 Uppsala, Sweden; (C.R.); (D.W.); (C.Ö.-M.)
| | - David Wenner
- Department of Materials Science and Engineering, Division of Applied Materials Science, Uppsala University, 751 21 Uppsala, Sweden; (C.R.); (D.W.); (C.Ö.-M.)
| | | | - Jöns Hilborn
- Department of Chemistry, Division of Polymer Chemistry, Uppsala University, 751 21 Uppsala, Sweden;
| | - Caroline Öhman-Mägi
- Department of Materials Science and Engineering, Division of Applied Materials Science, Uppsala University, 751 21 Uppsala, Sweden; (C.R.); (D.W.); (C.Ö.-M.)
| | - Cecilia Persson
- Department of Materials Science and Engineering, Division of Applied Materials Science, Uppsala University, 751 21 Uppsala, Sweden; (C.R.); (D.W.); (C.Ö.-M.)
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Wekwejt M, Michalska-Sionkowska M, Bartmański M, Nadolska M, Łukowicz K, Pałubicka A, Osyczka AM, Zieliński A. Influence of several biodegradable components added to pure and nanosilver-doped PMMA bone cements on its biological and mechanical properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 117:111286. [PMID: 32919647 DOI: 10.1016/j.msec.2020.111286] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 07/09/2020] [Accepted: 07/21/2020] [Indexed: 01/11/2023]
Abstract
Acrylic bone cements (BC) are wildly used in medicine. Despite favorable mechanical properties, processability and inject capability, BC lack bioactivity. To overcome this, we investigated the effects of selected biodegradable additives to create a partially-degradable BC and also we evaluated its combination with nanosilver (AgNp). We hypothesized that using above strategies it would be possible to obtain bioactive BC. The Cemex was used as the base material, modified at 2.5, 5 or 10 wt% with either cellulose, chitosan, magnesium, polydioxanone or tricalcium-phosphate. The resulted modified BC was examined for surface morphology, wettability, porosity, mechanical and nanomechanical properties and cytocompatibility. The composite BC doped with AgNp was also examined for its release and antibacterial properties. The results showed that it is possible to create modified cement and all studied modifiers increased its porosity. Applying the additives slightly decreased BC wettability and mechanical properties, but the positive effect of the additives was observed in nanomechanical research. The relatively poor cytocompatibility of modified BC was attributed to the unreacted monomer release, except for polydioxanone modification which increased cells viability. Furthermore, all additives facilitated AgNp release and increased BC antibacterial effectiveness. Our present studies suggest the optimal content of biodegradable component for BC is 5 wt%. At this content, an improvement in BC porosity is achieved without significant deterioration of BC physical and mechanical properties. Polydioxanone and cellulose seem to be the most promising additives that improve porosity and antibacterial properties of antibiotic or nanosilver-loaded BC. Partially-degradable BC may be a good strategy to improve their antibacterial effectiveness, but some caution is still required regarding their cytocompatibility. STATEMENT OF SIGNIFICANCE: The lack of bone cement bioactivity is the main limitation of its effectiveness in medicine. To overcome this, we have created composite cements with partially-degradable properties. We also modified these cements with nanosilver to provide antibacterial properties. We examined five various additives at three different contents to modify a selected bone cement. Our results broaden the knowledge about potential modifiers and properties of composite cements. We selected the optimal content and the most promising additives, and showed that the combination of these additives with nanosilver would increase cements` antibacterial effectiveness. Such modified cements may be a new solution for medical applications.
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Affiliation(s)
- M Wekwejt
- Biomaterials Division, Department of Materials Engineering and Bonding, Gdańsk University of Technology, Gdańsk, Poland.
| | - M Michalska-Sionkowska
- Faculty of Biological and Veterinary Sciences, Department of Environmental Microbiology and Biotechnology, Nicolaus Copernicus University in Toruń, Toruń, Poland
| | - M Bartmański
- Biomaterials Division, Department of Materials Engineering and Bonding, Gdańsk University of Technology, Gdańsk, Poland
| | - M Nadolska
- Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gdańsk, Poland
| | - K Łukowicz
- Institute of Zoology and Biomedical Research, Department of Biology and Cell Imaging, Faculty of Biology, Jagiellonian University, Kraków, Poland
| | - A Pałubicka
- Department of Surgical Oncologic, Medical University of Gdańsk, Gdańsk, Poland; Department of Laboratory Diagnostics and Microbiology with Blood Bank, Specialist Hospital in Kościerzyna, Kościerzyna, Poland
| | - A M Osyczka
- Institute of Zoology and Biomedical Research, Department of Biology and Cell Imaging, Faculty of Biology, Jagiellonian University, Kraków, Poland
| | - A Zieliński
- Biomaterials Division, Department of Materials Engineering and Bonding, Gdańsk University of Technology, Gdańsk, Poland
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Torres ÉMD, Valladares-Neto J, Bernades KDO, Naldi LF, Torres HMD, Carvalho AL, Estrela C. Facial profile changes due to bone cement graft to manage the hyperactive muscles of the gingival smile. Dental Press J Orthod 2020; 25:44-51. [PMID: 32490926 PMCID: PMC7265667 DOI: 10.1590/2177-6709.25.2.044-051.oar] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 02/20/2019] [Indexed: 11/30/2022] Open
Abstract
Objective: To evaluate facial profile changes promoted by polymethyl methacrylate (PMMA) cement graft to reduce excessive gingival display due to hyperactivity of the elevator muscles of the upper lip during smiling. Methods: Eleven patients (all females, age range: 20 to 43 years) presenting gingival smile that were treated with PMMA cement grafts in a private clinic were selected for this retrospective study. Three angular and ten linear cephalometric facial profile measurements were performed preoperatively (baseline, T1) and at least 6 months postoperatively (T2). Differences between T1 and T2 were verified by Wilcoxon test, and the correlation between the thickness of the graft and facial profile changes was statistically evaluated by Spearman’s Coefficient test. The significance level was set at p< 0.05. Results: The nasolabial angle (p= 0.03) and the labial component of the nasolabial angle showed statistically significant differences (p= 0.04), with higher values in T2. No correlations were found between the graft thickness and the statistically significant facial profile changes (p> 0.05). Conclusions: The PMMA bone cement graft projected the upper lip forward, thereby increasing the nasolabial angle without affecting the nasal component. No correlations between the graft thickness and the facial profile changes were detected.
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Affiliation(s)
- Érica Miranda de Torres
- Divisão de Reabilitação Oral, Faculdade de Odontologia, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - José Valladares-Neto
- Divisão de Ortodontia, Faculdade de Odontologia, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Karina de Oliveira Bernades
- Programa de Pós-graduação em Odontologia, Faculdade de Odontologia, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Luis Fernando Naldi
- Divisão de Periodontia, Faculdade de Odontologia, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Hianne Miranda de Torres
- Programa de Pós-graduação em Odontologia, Faculdade de Odontologia, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Alexandre Leite Carvalho
- Programa de Pós-graduação em Odontologia, Faculdade de Odontologia, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Carlos Estrela
- Divisão de Endodontia, Faculdade de Odontologia, Universidade Federal de Goiás, Goiânia, GO, Brazil
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Hulsart-Billström G, Stelzl C, Procter P, Pujari-Palmer M, Insley G, Engqvist H, Larsson S. In vivo safety assessment of a bio-inspired bone adhesive. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:24. [PMID: 32036502 PMCID: PMC7007900 DOI: 10.1007/s10856-020-6362-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 01/08/2020] [Indexed: 05/14/2023]
Abstract
A new class of materials, bone adhesives, could revolutionise the treatment of highly fragmented fractures. We present the first biological safety investigation of a bio-inspired bone adhesive. The formulation was based upon a modified calcium phosphate cement that included the amino acid phosphoserine. This material has recently been described as substantially stronger than other bioresorbable calcium phosphate cements. Four adhesive groups with the active substance (phosphoserine) and two control groups without phosphoserine were selected for in vitro and in vivo biocompatibility testing. The test groups were subject for cell viability assay and subcutaneous implantation in rats that was followed by gene expression analysis and histology assessment after 6 and 12 weeks. All adhesive groups supported the same rate of cell proliferation compared to the α-TCP control and had viability between 45-64% when compared to cell control. There was no evidence of an increased immune response or ectopic bone formation in vivo. To conclude, this bio-inspired bone adhesive has been proven to be safe, in the present study, without any harmful effects on the surrounding soft tissue.
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Affiliation(s)
- Gry Hulsart-Billström
- Division of Orthopaedics, Department of Surgical Sciences, Uppsala University, Uppsala, 751 85, Sweden.
| | - Christina Stelzl
- Division of Orthopaedics, Department of Surgical Sciences, Uppsala University, Uppsala, 751 85, Sweden
| | - Philip Procter
- Division of Applied Material Science, Department of Engineering Sciences, Uppsala University, Uppsala, 751 21, Sweden
| | - Michael Pujari-Palmer
- Division of Applied Material Science, Department of Engineering Sciences, Uppsala University, Uppsala, 751 21, Sweden
| | - Gerard Insley
- GPBio Ltd, Unit 4D, Western Business Park, Shannnon, Co. Clare, Ireland
| | - Håkan Engqvist
- Division of Applied Material Science, Department of Engineering Sciences, Uppsala University, Uppsala, 751 21, Sweden
| | - Sune Larsson
- Division of Orthopaedics, Department of Surgical Sciences, Uppsala University, Uppsala, 751 85, Sweden
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Buck E, Li H, Cerruti M. Surface Modification Strategies to Improve the Osseointegration of Poly(etheretherketone) and Its Composites. Macromol Biosci 2019; 20:e1900271. [DOI: 10.1002/mabi.201900271] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 10/18/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Emily Buck
- Department of Mining and Materials EngineeringMcGill University 3610 University Street Montreal QC H3A 0C5 Canada
| | - Hao Li
- Department of Mining and Materials EngineeringMcGill University 3610 University Street Montreal QC H3A 0C5 Canada
| | - Marta Cerruti
- Department of Mining and Materials EngineeringMcGill University 3610 University Street Montreal QC H3A 0C5 Canada
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Owji N, Aldaadaa A, Cha JR, Shakouri T, García-Gareta E, Kim HW, Knowles JC. Synthesis, Characterization, and 3D Printing of an Isosorbide-Based, Light-Curable, Degradable Polymer for Potential Application in Maxillofacial Reconstruction. ACS Biomater Sci Eng 2019; 6:2578-2587. [DOI: 10.1021/acsbiomaterials.9b00884] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Nazanin Owji
- RAFT, Regenerative Biomaterials Group, The RAFT Institute, Mount Vernon Hospital, Northwood HA6 2RN, U.K
| | | | - Jae-Ryung Cha
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
| | | | - Elena García-Gareta
- RAFT, Regenerative Biomaterials Group, The RAFT Institute, Mount Vernon Hospital, Northwood HA6 2RN, U.K
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, Republic of Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31114, Republic of Korea
- UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan 31114, Republic of Korea
| | - Jonathan C. Knowles
- The Discoveries Centre for Regenerative and Precision Medicine, University College London, UCL Campus, London WC1E 6BT, U.K
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31114, Republic of Korea
- UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan 31114, Republic of Korea
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Robo C, Hulsart-Billström G, Nilsson M, Persson C. In vivo response to a low-modulus PMMA bone cement in an ovine model. Acta Biomater 2018; 72:362-370. [PMID: 29559365 DOI: 10.1016/j.actbio.2018.03.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 03/03/2018] [Accepted: 03/06/2018] [Indexed: 02/08/2023]
Abstract
Poly(methyl methacrylate) (PMMA) is the most commonly used material for the treatment of osteoporosis-induced vertebral compression fractures. However, its high stiffness may introduce an increased risk of adjacent vertebral fractures post-surgery. One alternative in overcoming this concern is the use of additives. This presents its own challenge in maintaining an adequate biocompatibility when modifying the base cement. The aim of this study was to evaluate the in vivo biocompatibility of linoleic acid (LA)-modified acrylic bone cement using a large animal model for the first time, in order to further advance towards clinical use. A worst-case approach was used, choosing a slow-setting base cement. The in vitro monomer release from the cements was also assessed. Additional material characterization, including mechanical tests, are summarized in Appendix A. Unmodified and LA-modified cements were injected into a total of 56 bone defects created in the femur and humerus of sheep. Histopathologic and histomorphometric analysis indicated that LA-modified cement showed a harmless tissue response similar to that of the unmodified cement. Adjacent bone remodeling was observed microscopically 4 weeks after implantation, suggesting a normal healing process of the bone tissues surrounding the implant. LA-modified cement exhibited lower mechanical properties, with a reduction in the elastic modulus of up to 65%. The handling properties were slightly modified without negatively affecting the injectability of the base cement. LA-modified bone cement showed good biocompatibility as well as bone compliant mechanical properties and may therefore be a promising material for the treatment of osteoporotic vertebral fractures. STATEMENT OF SIGNIFICANCE The benefits of using linoleic acid to reduce the stiffness of poly(methyl methacrylate) bone cement has been demonstrated previously, with the in vitro and in vivo response of the modified cement in small animals reported as comparable to the base cement. However, biocompatibility evaluation of modified cement in large animal models for future clinical use has yet to be performed. In this study, modified and unmodified cements were injected into bone defects created in sheep. We showed that the inflammatory response of the modified cement was similar to the base cement, allowing remodelling of the bone surrounding the implant. This demonstrates the potential of low-modulus PMMA cement in the field of bone augmentation.
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Goñi I, Rodríguez R, García-Arnáez I, Parra J, Gurruchaga M. Preparation and characterization of injectable PMMA-strontium-substituted bioactive glass bone cement composites. J Biomed Mater Res B Appl Biomater 2017; 106:1245-1257. [PMID: 28580716 DOI: 10.1002/jbm.b.33935] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 05/15/2017] [Accepted: 05/16/2017] [Indexed: 12/31/2022]
Abstract
In most minimally-invasive procedures used to address severe pain arising from compression fractures of the vertebral bodies, such as percutaneous vertebroplasty (PVP), a poly(methyl methacrylate) (PMMA) bone cement is used. Shortcomings of this type of cement, such as high exotherm temperature and lack of bioactivity, are well known. We prepared different formulations of a composite bone cement, whose solid constituents consisted of PMMA beads and particles of a bioactive glass (BG), where 0-20%(w/w) of the calcium component was substituted by strontium. The difference between the formulations was in the relative amounts of the solid phase constituents and in the Sr-content of BG. We determined the influence of the mixture of solid phase constituents of the cement formulation on a collection of properties, such as maximum exotherm temperature (Tmax ), setting time (tset ), and injectability (I). The selection of the PMMA beads was crucial to obtain cement composite formulations capable to be efficiently injected. Results allowed to select nine solid phase mixtures to be further tested. Then, we determined the influence of the composition of these composite bone cements on Tmax , tset , I, and cell proliferation. The results showed that the performance of various of the selected composite cements was better than that of PMMA cement reference, with lower Tmax , lower tset , and higher I. We found that incorporation of Sr-substituted BGs into these materials bestows bioactivity properties associated with the role of Sr in bone formation, leading to some composite cement formulations that may be suitable for use in PVP. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1245-1257, 2018.
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Affiliation(s)
- I Goñi
- Department of Science and Technology of Polymers, POLYMAT (Institute of Polymeric Materials), Faculty of Chemistry, University of The Basque Country (UPV/EHU), P°Manuel de Lardizabal, 3., 20018, San Sebastián, Spain
| | - R Rodríguez
- Department of Science and Technology of Polymers, POLYMAT (Institute of Polymeric Materials), Faculty of Chemistry, University of The Basque Country (UPV/EHU), P°Manuel de Lardizabal, 3., 20018, San Sebastián, Spain
| | - I García-Arnáez
- Department of Science and Technology of Polymers, POLYMAT (Institute of Polymeric Materials), Faculty of Chemistry, University of The Basque Country (UPV/EHU), P°Manuel de Lardizabal, 3., 20018, San Sebastián, Spain
| | - J Parra
- Unidad Asociada CAA-CSIC. Biomedical Research Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN). Complejo Asistencial de Ávila. Hospital Provincial., 05071, Ávila, Spain
| | - M Gurruchaga
- Department of Science and Technology of Polymers, POLYMAT (Institute of Polymeric Materials), Faculty of Chemistry, University of The Basque Country (UPV/EHU), P°Manuel de Lardizabal, 3., 20018, San Sebastián, Spain
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