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Nitschke BM, Beltran FO, Hahn MS, Grunlan MA. Trends in bioactivity: inducing and detecting mineralization of regenerative polymeric scaffolds. J Mater Chem B 2024; 12:2720-2736. [PMID: 38410921 PMCID: PMC10935659 DOI: 10.1039/d3tb02674d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/14/2024] [Indexed: 02/28/2024]
Abstract
Due to limitations of biological and alloplastic grafts, regenerative engineering has emerged as a promising alternative to treat bone defects. Bioactive polymeric scaffolds are an integral part of such an approach. Bioactivity importantly induces hydroxyapatite mineralization that promotes osteoinductivity and osseointegration with surrounding bone tissue. Strategies to confer bioactivity to polymeric scaffolds utilize bioceramic fillers, coatings and surface treatments, and additives. These approaches can also favorably impact mechanical and degradation properties. A variety of fabrication methods are utilized to prepare scaffolds with requisite morphological features. The bioactivity of scaffolds may be evaluated with a broad set of techniques, including in vitro (acellular and cellular) and in vivo methods. Herein, we highlight contemporary and emerging approaches to prepare and assess scaffold bioactivity, as well as existing challenges.
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Affiliation(s)
- Brandon M Nitschke
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Felipe O Beltran
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Mariah S Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX 77843, USA
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
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Anup A, Dieterich S, Oreffo ROC, Dailey HL, Lang A, Haffner-Luntzer M, Hixon KR. Embracing ethical research: Implementing the 3R principles into fracture healing research for sustainable scientific progress. J Orthop Res 2024; 42:568-577. [PMID: 38124294 DOI: 10.1002/jor.25741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 10/26/2023] [Accepted: 11/14/2023] [Indexed: 12/23/2023]
Abstract
As scientific advancements continue to reshape the world, it becomes increasingly crucial to uphold ethical standards and minimize the potentially adverse impact of research activities. In this context, the implementation of the 3R principles-Replacement, Reduction, and Refinement-has emerged as a prominent framework for promoting ethical research practices in the use of animals. This article aims to explore recent advances in integrating the 3R principles into fracture healing research, highlighting their potential to enhance animal welfare, scientific validity, and societal trust. The review focuses on in vitro, in silico, ex vivo, and refined in vivo methods, which have the potential to replace, reduce, and refine animal experiments in musculoskeletal, bone, and fracture healing research. Here, we review material that was presented at the workshop "Implementing 3R Principles into Fracture Healing Research" at the 2023 Orthopedic Research Society (ORS) Annual Meeting in Dallas, Texas.
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Affiliation(s)
- Amritha Anup
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, USA
| | - Sandra Dieterich
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany
| | - Richard O C Oreffo
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Institute of Developmental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Hannah L Dailey
- Departments of Orthopaedic Surgery and Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Annemarie Lang
- Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pennsylvania, USA
| | - Melanie Haffner-Luntzer
- Institute of Orthopaedic Research and Biomechanics, University Medical Center Ulm, Ulm, Germany
| | - Katherine R Hixon
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, USA
- Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire, USA
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Tong L, Yang Z, Dai W, Sun Z, Yang J, Xue Q, Li Y. Experimental study on determining the degree of bone healing by wall thickness ratio analysis. J Orthop Surg Res 2024; 19:79. [PMID: 38243260 PMCID: PMC10799492 DOI: 10.1186/s13018-024-04565-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 01/16/2024] [Indexed: 01/21/2024] Open
Abstract
To verify the reliability and accuracy of wall thickness ratio analysis to determine the degree of bone healing, fracture models were established with 6 beagles. X-ray, micro-CT, and CT scans were performed at 24 weeks. The healthy side and the affected side were used to simulate the three-dimensional geometric model after internal fixation, and the mesh was divided. The mean and median CT wall thickness values were obtained through the wall thickness analysis. X-ray, CT, micro-CT, and gross appearance were used to determine the degree of bone healing, which was compared with wall thickness analysis. There was a positive correlation between the average CT value and the median wall thickness. The correlation coefficient analysis of the median wall thickness ratio (R2) and healing index ratio (R3) showed a positive correlation. The results of the wall thickness ratio (R2) and the healing index ratio (R3) were used to determine bone healing, and the results were consistent with the results of the actual mechanical test and image analysis. The results of wall thickness ratio analysis were significantly correlated with the degree of bone healing. This method is simple, rapid, and practical to analyze and judge the degree of bone healing.
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Affiliation(s)
- Liangcheng Tong
- Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Anhui Medical University, No. 1 Malu Road, Nanjing, 210002, Jiangsu, China
| | - Zhiwei Yang
- Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Anhui Medical University, No. 1 Malu Road, Nanjing, 210002, Jiangsu, China
| | - Wei Dai
- Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Anhui Medical University, No. 1 Malu Road, Nanjing, 210002, Jiangsu, China
| | - Zhongyang Sun
- Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Anhui Medical University, No. 1 Malu Road, Nanjing, 210002, Jiangsu, China
| | - Junsheng Yang
- Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Anhui Medical University, No. 1 Malu Road, Nanjing, 210002, Jiangsu, China
| | - Qing Xue
- Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Anhui Medical University, No. 1 Malu Road, Nanjing, 210002, Jiangsu, China
| | - Ying Li
- Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Anhui Medical University, No. 1 Malu Road, Nanjing, 210002, Jiangsu, China.
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Gu F, Zhang K, Zhu WA, Sui Z, Li J, Xie X, Yu T. Silicone rubber sealed channel induced self-healing of large bone defects: Where is the limit of self-healing of bone? J Orthop Translat 2023; 43:21-35. [PMID: 37965195 PMCID: PMC10641457 DOI: 10.1016/j.jot.2023.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 08/02/2023] [Accepted: 09/12/2023] [Indexed: 11/16/2023] Open
Abstract
Background Large defects of long tubular bones due to severe trauma, bone tumor resection, or osteomyelitis debridement are challenging in orthopedics. Bone non-union and other complications often lead to serious consequences. At present, autologous bone graft is still the gold standard for the treatment of large bone defects. However, autologous bone graft sources are limited. Silicon rubber (SR) materials are widely used in biomedical fields, due to their safety and biocompatibility, and even shown to induce nerve regeneration. Materials and methods We extracted rat bone marrow mesenchymal stem cells (BMMSCs) in vitro and verified the biocompatibility of silicone rubber through cell experiments. Then we designed a rabbit radius critical sized bone defect model to verify the effect of silicone rubber sealed channel inducing bone repair in vivo. Results SR sealed channel could prevent the fibrous tissue from entering the fracture end and forming bone nonunion, thereby inducing self-healing of long tubular bone through endochondral osteogenesis. The hematoma tissue formed in the early stage was rich in osteogenesis and angiogenesis related proteins, and gradually turned into vascularization and endochondral osteogenesis, and finally realized bone regeneration. Conclusions In summary, our study proved that SR sealed channel could prevent the fibrous tissue from entering the fracture end and induce self-healing of long tubular bone through endochondral osteogenesis. In this process, the sealed environment provided by the SR channel was key, and this might indicate that the limit of self-healing of bone exceeded the previously thought. The translational potential of this article This study investigated a new concept to induce the self-healing of large bone defects. It could avoid trauma caused by autologous bone extraction and possible rejection reactions caused by bone graft materials. Further research based on this study, including the innovation of induction materials, might invent a new type of bone inducing production, which could bring convenience to patients. We believed that this study had significant meaning for the treatment of large bone defects in clinical practice.
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Affiliation(s)
- Feng Gu
- Department of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
| | - Ke Zhang
- Department of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
| | - Wan-an Zhu
- Department of Radiology, First Hospital of Jilin University, Changchun, 130021, China
| | - Zhenjiang Sui
- Department of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
| | - Jiangbi Li
- Department of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
| | - Xiaoping Xie
- Department of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
| | - Tiecheng Yu
- Department of Orthopedics, First Hospital of Jilin University, Changchun, 130021, China
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Wang Y, Wang Z, Yu X, Zhang M, Wang X, Zhou Y, Yao Q, Wu C. 3D-Printing of succulent plant-like scaffolds with beneficial cell microenvironments for bone regeneration. J Mater Chem B 2023. [PMID: 36779236 DOI: 10.1039/d2tb02056d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Biomimetic materials with complicated structures inspired by natural plants play a critical role in tissue engineering. The succulent plants, with complicated morphologies, show tenacious vitality in extreme conditions due to the physiological functions endowed by their unique anatomical structures. Herein, inspired by the macroscopic structure of succulent plants, succulent plant-like bioceramic scaffolds were fabricated via digital laser processing 3D printing of MgSiO3. Compared with conventional scaffolds with interlaced columns, the structures could prevent cells from leaking from the scaffolds and enhance cell adhesion. The scaffold morphology could be well regulated by changing leaf sizes, shapes, and interlacing methods. The succulent plant-like scaffolds show excellent properties for cell loading as well as cell distribution, promoting cellular interplay, and further enhancing the osteogenic differentiation of bone marrow stem cells. The in vivo study further illustrated that the succulent plant-like scaffolds could accelerate bone regeneration by inducing the formation of new bone tissues. The study suggests that the obtained succulent plant-like scaffold featuring the plant macroscopic structure is a promising biomaterial for regulating cell distribution, enhancing cellular interactions, and further improving bone regeneration.
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Affiliation(s)
- Yufeng Wang
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, 210006, Nanjing, China. .,State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
| | - Zikang Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
| | - Xiaopeng Yu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
| | - Meng Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
| | - Xin Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
| | - Yanling Zhou
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
| | - Qingqiang Yao
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, 210006, Nanjing, China.
| | - Chengtie Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
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Kajabi AW, Zbýň Š, Johnson CP, Tompkins MA, Nelson BJ, Takahashi T, Shea KG, Marette S, Carlson CS, Ellermann JM. Longitudinal 3T MRI T 2 * mapping of Juvenile osteochondritis dissecans (JOCD) lesions differentiates operative from non-operative patients-Pilot study. J Orthop Res 2023; 41:150-160. [PMID: 35430743 PMCID: PMC9573934 DOI: 10.1002/jor.25343] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/21/2022] [Accepted: 04/13/2022] [Indexed: 02/04/2023]
Abstract
Juvenile osteochondritis dissecans (JOCD) is an orthopedic joint disorder of children and adolescents that can lead to premature osteoarthritis. Thirteen patients (mean age: 12.3 years, 4 females), 15 JOCD-affected and five contralateral healthy knees, that had a baseline and a follow-up magnetic resonance imaging (MRI) (mean interval of 8.9 months) and were treated nonoperatively during this interval were included. Retrospectively, patients were assigned to operative or nonoperative groups based on their electronic medical records. Volumetric mean T2 * values were calculated within regions of interest (progeny lesion, interface, parent bone) and region matched control bone in healthy contralateral knees and condyles. The normalized percentage difference of T2 * between baseline and follow up MRI in nonoperative patients significantly increased in progeny lesion (-47.8%, p < 0.001), parent bone (-13.9%, p < 0.001), and interface (-32.3%, p = 0.011), whereas the differences in operative patients were nonsignificant and below 11%. In nonoperative patients, the progeny lesion (p < 0.001) and interface T2 * values (p = 0.012) were significantly higher than control bone T2 * at baseline, but not at follow-up (p = 0.219, p = 1.000, respectively). In operative patients, the progeny lesion and interface T2 * values remained significantly elevated compared to the control bone both at baseline (p < 0.001, p < 0.001) and follow-up (p < 0.001, p < 0.001), respectively. Clinical Significance: Longitudinal T2 * mapping differentiated nonhealing from healing JOCD lesions following initial nonoperative treatment, which may assist in prognosis and improve the ability of surgeons to make recommendations regarding operative versus nonoperative treatment.
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Affiliation(s)
- Abdul Wahed Kajabi
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
- Department of Radiology, University of Minnesota, Minneapolis, MN, USA
| | - Štefan Zbýň
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
- Department of Radiology, University of Minnesota, Minneapolis, MN, USA
| | - Casey P. Johnson
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
- Department of Veterinary Clinical Sciences, University of Minnesota, St. Paul, MN, USA
| | - Marc A. Tompkins
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN, USA
| | - Bradley J. Nelson
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN, USA
| | - Takashi Takahashi
- Department of Radiology, University of Minnesota, Minneapolis, MN, USA
| | | | - Shelly Marette
- Department of Radiology, University of Minnesota, Minneapolis, MN, USA
| | - Cathy S. Carlson
- Department of Veterinary Clinical Sciences, University of Minnesota, St. Paul, MN, USA
| | - Jutta M. Ellermann
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
- Department of Radiology, University of Minnesota, Minneapolis, MN, USA
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