Volume 18, Issue 36 2203003
Research Article

Development of Biodegradable Osteopromotive Citrate-Based Bone Putty

Xinyu Tan

Xinyu Tan

Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong Province, 510515 China

Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802 USA

Academy of Orthopedics, Provincial Key Laboratory of Bone and Joint Degenerative Diseases, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province, 510280 China

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Ethan Gerhard

Ethan Gerhard

Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802 USA

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Yuqi Wang

Yuqi Wang

Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802 USA

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Richard T. Tran

Richard T. Tran

Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802 USA

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Hui Xu

Hui Xu

Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802 USA

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Su Yan

Su Yan

Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802 USA

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Elias B. Rizk

Elias B. Rizk

Department of Neurosurgery, College of Medicine, The Pennsylvania State University, Hershey, PA, 17033 USA

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April D. Armstrong

April D. Armstrong

Department of Orthopaedics and Rehabilitation, College of Medicine, The Pennsylvania State University, Hershey, PA, 17033 USA

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Yuxiao Zhou

Yuxiao Zhou

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA, 16802 USA

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Jing Du

Jing Du

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA, 16802 USA

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Xiaochun Bai

Corresponding Author

Xiaochun Bai

Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong Province, 510515 China

Academy of Orthopedics, Provincial Key Laboratory of Bone and Joint Degenerative Diseases, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong Province, 510280 China

E-mail: [email protected], [email protected]

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Jian Yang

Corresponding Author

Jian Yang

Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802 USA

E-mail: [email protected], [email protected]

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First published: 19 June 2022
Citations: 11

Abstract

The burden of bone fractures demands development of effective biomaterial solutions, while additional acute events such as noncompressible bleeding further motivate the search for multi-functional implants to avoid complications including osseous hemorrhage, infection, and nonunion. Bone wax has been widely used in orthopedic bleeding control due to its simplicity of use and conformation to irregular defects; however, its nondegradability results in impaired bone healing, risk of infection, and significant inflammatory responses. Herein, a class of intrinsically fluorescent, osteopromotive citrate-based polymer/hydroxyapatite (HA) composites (BPLP-Ser/HA) as a highly malleable press-fit putty is designed. BPLP-Ser/HA putty displays mechanics replicating early nonmineralized bone (initial moduli from ≈2–500 kPa), hydration induced mechanical strengthening in physiological conditions, tunable degradation rates (over 2 months), low swelling ratios (<10%), clotting and hemostatic sealing potential (resistant to blood pressure for >24 h) and significant adhesion to bone (≈350–550 kPa). Simultaneously, citrate's bioactive properties result in antimicrobial (≈100% and 55% inhibition of S. aureus and E. coli) and osteopromotive effects. Finally, BPLP-Ser/HA putty demonstrates in vivo regeneration in a critical-sized rat calvaria model equivalent to gold standard autograft. BPLP-Ser/HA putty represents a simple, off-the-shelf solution to the combined challenges of acute wound management and subsequent bone regeneration.

Conflict of Interest

Dr. Jian Yang and The Pennsylvania State University have a financial interest in Acuitive Technologies, Inc. and Aleo BME, Inc. These interests have been reviewed by the University's Institutional and Individual Conflict of Interest Committees and are currently being managed by the University.

Data Availability Statement

Research data are not shared.

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