Experimental and Analytical Characterization of β-Tricalcium Phosphate Particle Reinforced Poly-L-Lactide Composites(<Special Issue>Macro-, Micro-, Meso-, and Nano-scopic Strength of Materials Relating to Microstructures)
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概要
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Bioactive ceramics, β-tricalcium phosphate (β-TCP), particles reinforced bioabsorbable plastics poly-L lactide (PLLA) composites have been expected to apply for the fracture fixations which have more biocompatibility than monolithic PLLA. In this study, β-TCP/PLLA composites containing three different β-TCP contents (4.8, 9.5, 14.3 wt%) were prepared by injection molding. The results of bending tests show bending strength decreases with increasing β-TCP contents. On the other hand, bending modulus increases with increasing β-TCP contents. After immersion tests in PBS at 37℃ up to 8 weeks, the mechanical properties were hardly degraded in all specimens. The results of fracture surface observation by scanning electron microscopy indicated that microscopic damage such as debonding between β-TCP and PLLA initiates at β-TCP agglomeration and grows with increasing loading. Analytical predictions of the relationship between stress and strain based on micromechanics considering the progress of debonding between β-TCP and PLLA were in good agreement with experimental results.
- 一般社団法人日本機械学会の論文
- 2006-07-15
著者
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Kobayashi Satoshi
Department of Aging Medicine and Geriatrics, Shinshu University, Graduate School of Medicine
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林 司
海洋大院
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SAKAMOTO Kazuki
Department of Mechanical Engineering, Graduate School of Engineering, Tokyo Metropolitan University
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Sakamoto Kazuki
Department Of Mechanical Engineering Graduate School Of Engineering Tokyo Metropolitan University
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Sakamoto Kazuki
Department Of Experimental Therapeutics Cancer Research Institute Kanazawa University
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小林 訓史
首都大学東京 大学院理工学研究科
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Kobayashi S
Department Of Mechanical Engineering Tokyo Metropolitan University
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小林 訓史
首都大学東京
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