Degradation in vitro and in vivo of β-TCP/MCPM-based premixed calcium phosphate cement
| Autor: | Cheng Ge, Junjie Li, Rongjian Lu, Yao Shu, Yuji Yin, Yu Zhou, Chunge Li, Xuan Zou, Qihong Li, Kaitao Yu, Wang Ying, Pengwei Ma |
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| Rok vydání: | 2019 |
| Předmět: |
Calcium Phosphates
Biomedical Engineering chemistry.chemical_element 02 engineering and technology Polyethylene glycol Calcium Biomaterials 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine In vivo Materials Testing PEG ratio Glycerol Monocalcium phosphate Mechanical Phenomena Bone Cements Water 030206 dentistry 021001 nanoscience & nanotechnology Phosphate Molecular Weight Solvent chemistry Chemical engineering Mechanics of Materials 0210 nano-technology |
| Zdroj: | Journal of the Mechanical Behavior of Biomedical Materials. 90:86-95 |
| ISSN: | 1751-6161 |
| Popis: | Premixed calcium phosphate cements (CPCs) have been developed to shorten the surgical time of conventional CPCs. However, there is lack of investigation on degradation behavior of premixed CPCs in vitro and in vivo. In this study, the premixed CPCs are prepared by mixing glycerol or polyethylene glycol (PEG) with the CPC power (β-tricalcium phosphate (β-TCP) and monocalcium phosphate monohydrate (MCPM)), and their degradation performances including the microstructure, chemical composition and mechanical properties are systematically evaluated both in vitro and in vivo (subcutaneous implantations in rabbits). When the premixed CPCs aged in PBS or FBS, results show weight loss of the specimens, decreased pH value and increased calcium ion concentration of aging media. Meanwhile, the setting products convert from dicalcium phosphate dihydrate (DCPD) to dicalcium phosphate anhydrous (DCPA), and no hydroxyapatite deposit. The specimen size and the molecular weight of non-aqueous solvent can modulate the setting product of premixed CPCs. For the larger specimens, DCPA is the main setting product, for the smaller ones, the composite contained DCPD and DCPA. With the decrease of the molecular weight of the non-aqueous solvent PEG, the setting product change from both DCPD and DCPA to DCPA due to the quicker exchange rate of PEG with water. After a period of subcutaneous implantation, the surface of the grafts obviously disintegrated with the formation of porous structures, but their internal morphology do not obviously change. |
| Databáze: | OpenAIRE |
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