Gd Added Mg Alloy for Biodegradable Implant Applications.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39215555.
- Also identified by DOI 10.1002/jbm.b.35474.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Microstructure, mechanical, in vitro and in vivo behavior of extruded Mg alloys with varying Zn/Gd ratios, Mg-2Gd-2Zn-0.5Zr (Zn/Gd = 1), Mg-2Gd-6Zn-0.5Zr (Zn/Gd = 3), and Mg-10Gd-1Zn-0.5Zr (Zn/Gd = 0.1) were investigated. The results revealed that the major secondary phases such as W (Mg<sub>3</sub>Zn<sub>3</sub>Gd<sub>2</sub>), (Mg,Zn)<sub>3</sub>Gd, LPSO (Long period stacking order) and I (Mg<sub>3</sub>Zn<sub>6</sub>Gd) phase in alloys depended on Zn/Gd ratio. These second phases influenced the mechanical as well as biological characteristics of the alloys. Among studied alloys, Mg-10Gd-1Zn-0.5Zr alloy showed the highest yield strength and tensile strength of 270 (±9.29) and 330 MPa (±15.8), respectively, with a reasonably good elongation of 12% (±2.36). The presence of Gd<sub>2</sub>O<sub>3</sub> in the degradation film of Mg-10Gd-1Zn-0.5Zr enhanced the resistance offered by the film, which resulted in its lowest biodegradation, better viability, and cell proliferation under in vitro condition. The short term (subcutaneous implantation in rats for 1 month) in vivo studies showed that the alloy Mg-10Gd-1Zn-0.5Zr degraded at a rate of 0.35 mm/y (±0.02) and did not induce any toxicity to the vital organs.
Medical subject headings
- Alloys
- Absorbable Implants
- Magnesium
- Materials Testing
- Gadolinium