J. Mater. Sci. Technol. ›› 2016, Vol. 32 ›› Issue (9): 827-834.DOI: 10.1016/j.jmst.2016.05.003
Special Issue: 2016腐蚀与防护专辑
• Orginal Article • Previous Articles Next Articles
Received:
2015-11-02
Accepted:
2015-12-18
Online:
2016-09-20
Published:
2016-11-02
Contact:
Yang Ke
Wan Peng,Tan Lili,Yang Ke. Surface Modification on Biodegradable Magnesium Alloys as Orthopedic Implant Materials to Improve the Bio-adaptability: A Review[J]. J. Mater. Sci. Technol., 2016, 32(9): 827-834.
Fig. 3. 2D slice and 3D reconstruction morphologies of (a) the uncoated and (b) coated samples at implantation periods of 4, 8, and 12 weeks by HRTXRT[24].
Fig. 5. A model explaining the improvements due to the presence of bioactive calcium orthophosphate coatings on Mg and its alloys. (A) A relatively rapid degradation rate of Mg might lead to formation of gaps at the interface. (B) A typical tetracycline label taken 14 weeks post-operation. (C) Protective calcium orthophosphate coatings can reduce the degradation rate and simultaneously ameliorate biocompatibility. (D) Corrosion-protective effects of calcium orthophosphate coatings measured via the H2 release rate and the change in pH value[31].
Fig. 7. Post-op X-ray images after implantation of (a) 4 and (b) 8 weeks for (1) as-cast alloy, (2) as-extruded alloy and (3) as-cast alloy with coating[47].
Fig. 9. Results of extraction torque measurements on non-coated AZ31B, coated AZ31B, PLLA and Ti6Al4V implanted in vivo for 1, 4, 12 and 21 weeks, respectively [52].
Fig. 10. Variations of the one-point bending loads of non-coated AZ31B, coated AZ31B and PLLA screws when extracted from the bones after 1, 4, 12 and 21 weeks of implantation[52].
Fig. 11. The magnesium-based metallic devices with different coatings application, (a) MAO coating on pure magnesium screw (courtesy of EON Co., Ltd), (b) DCPD coating on JDBM alloys[57], (c) AZ31B screw with Si-containing coating[34], (d, e) chemical conversion coated screw and plate for animal test (courtesy of Trauson Holdings Company Ltd).
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