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- Title
Analysis of mineralized-crystallization collagen-hydroxyapaptide bone substitute's ultra-microstructure and its mechanical property.
- Authors
Zhang Li-hai; Hu Min; Gao Fei; Xiao Hong-xi; Liang Jun; Niu Yu; Wen Wei-sheng
- Abstract
PURPOSE: To construct bionic collagen-hydroxpapite bobe substitute materials through mineralized crystallization, and then assess its structure, physical and chemical performance for explaining its shortcoming in mechanical property. METHODS: Collagen-hydroxyapatite scaffolds with HA on the fibre surface of Col were prepared using a phase-separation technique and mineralized crystallization. The structure characteristics were investigated by SEM, the mechanics properties were analyzed by DSC and tensile test, and the surface elements were determined through ESCA and XRD. RESULTS: In this material, the hydroxyapatite crystallized around the polar groups on collagen fiber surface, the material was loosely organized, and the shape was irregular. The mechanical strength of matrices was decreased by the process of mineralized crystallization. Compared with Col matrix (0.78 MPa), the tension strength of MC bone matrix decreased significantly (0.21 MPa). The rupture length also decreased from 3.86% to 1.13%. And the transition temperature in DSC reduced from 109 °C to 102 °C. CONCLUSSIONS: It is indicated that this bone substitute material has inferior mechanical properties. The mineralized crystallization process destroys the ultra-microstructure of the collagen fiber, and caused the shortcoming of material's mechanics performance.
- Subjects
CRYSTALLIZATION; COLLAGEN; MICROSTRUCTURE; BIONICS; BONES
- Publication
China Journal of Oral & Maxillofacial Surgery, 2008, Vol 6, Issue 5, p356
- ISSN
1672-3244
- Publication type
Article