MAGNESIUM BASED ALLOYS FOR ORTHOPEDIC APPLICATION

Abstract

Biodegradable orthopaedic applications employ metals that include trace elements found in human bodies. These temporary implants give mechanical support to broken or diseased tissues while they recover. Because magnesium alloys are predicted to dissolve entirely in a physiological environment and the breakdown products may be digested and absorbed by the body, no more operations are necessary to remove these implants after the tissue has fully recovered. Magnesium characteristics, such as density, Young's modulus, tensile strength, yield strength, and so on, are closer to those of real bone. Magnesium also has the benefit of being non-toxic and biodegradable in nature. . This is the main reason why magnesium is widely used in biodegradable applications. These are the main reasons why researchers are more attracted towards Mg in biodegradable implants. But its rapid degradation are the main disadvantage and limits its use in pure Metal. In this paper conventionally used Mg plate used in orthopedic application is modified. By using Ansys Workbench structural analysis is done on conventionally used Mg alloy plate and modified Mg alloy plate used biodegradable implants. Results shows that equivalent stress (Von- Mises) value (average) is lower in modified Mg alloy plate under the tensile and compressive loading. Also the value of equivalent strain and total deformation is lower in modified Mg alloy plate. Mg alloy plate is used to give support to fractured bone during healing process. And smaller value of deformation is desired when external load is applied.