Load‐bearing biodegradable PCL‐PGA ‐beta TCP scaffolds for bone tissue regeneration
| Autor: | Ibrahim Aldulijan, Amalia Terracciano, Tsan-Liang Su, Carlos H. Leon, Aneela Anwar, Xiaojun Yu, Alok Kumar, Sangamesh G. Kumbar, Dilhan M. Kalyon, Seyed Mohammad Mir, Xiao Zhao, Agrim Mahajan |
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| Rok vydání: | 2020 |
| Předmět: |
Calcium Phosphates
Materials science Compressive Strength Polyesters Biomedical Engineering Compression molding 02 engineering and technology 010402 general chemistry Bone tissue 01 natural sciences Weight-Bearing Biomaterials chemistry.chemical_compound Absorbable Implants medicine Dissolution Glycolic acid Biodegradation 021001 nanoscience & nanotechnology Compression (physics) 0104 chemical sciences medicine.anatomical_structure Compressive strength chemistry Bone Substitutes 0210 nano-technology Caprolactone Polyglycolic Acid Biomedical engineering |
| Zdroj: | Journal of Biomedical Materials Research Part B: Applied Biomaterials. 109:193-200 |
| ISSN: | 1552-4981 1552-4973 |
| DOI: | 10.1002/jbm.b.34691 |
| Popis: | A biocompatible and biodegradable scaffold with load-bearing ability is required to enhance the repair of bone defects by facilitating the attachment, and proliferation of cells, and vascularization during new bone formation. However, it is challenging to maintain the porosity and biodegradability, as well as mechanical properties (especially compressive strength), at the same time. Therefore, in the present work, a biodegradable composite structure of poly(caprolactone) (PCL) was designed using compression molding with varying amounts of poly(glycolic acid) (PGA) (25, 50, 75 wt%) and fixed amount (20 wt%) of beta tricalcium phosphate (beta TCP). It was hypothesized that the fabricated composite structure will develop porosity during the degradation of the PGA and that the corresponding decrease in mechanical properties will be compensated by new bone formation and ingrowth, in vivo. Accordingly, we have systematically studied the effects of sample composition on time-dependent dissolution and mechanical properties of the PGA/beta TCP scaffolds. The compressive strength increased up to ~92 MPa at 50% compression of the designed PCL-PGA samples. Furthermore, the dissolution rate, as well as weight loss, was observed to increase with an increase in the PGA amount in PCL. Based on the mechanical properties and dissolution data, it is concluded that the PCL-PGA scaffolds with beta TCP can be suitable candidates for bone tissue engineering applications, specifically for the reconstruction of bone defects, where strength and biodegradation are both important characteristics. |
| Databáze: | OpenAIRE |
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