FATIGUE BASED DESIGN OF BIOMEDICAL IMPLANT MATERIALS
Due to evolving medical knowledge and increase in wealth,annually over amillion of dental and orthopaedic joint replacement procedures are performedworldwide.As a result,the biomaterials industry has witnessed enormous growthrates in both materials research and clinical applications.An ideal bone and teethsubstitute material should be tolerated by the host tissue,without any adversereaction; it should promote bone and tooth formation,have appropriate mechanicalstrength,be malleable and resorb after it has fulfilled its function.Materialproperties such as fatigue,toughness and fracture behavior play an important role inthe material selection because it must be taken into account in implant design andwill affect the implant viability after implantation.The mechanical properties offatigue,creep and stress relaxation,are all time dependent material behavior,inaddition to their dependence on the environment and are the most importantparameters for the material selection from mechanical point of view. As all the different categories of conventional biomaterials are prone to fatigue,in which the crack initiates at defect/interface and propagates on subsequentloadings leading to catastrophic failure.The purpose of this paper is to focus onthese phenomena under various in-vivo conditions and identify the design criteriafor future biomedical implant design and to look into possibilities of adaptingbiomimetic strategies to limit crack growth and or regenerate tissue.
A.Srivastav
Professor & Director,College of Engineering & Technology,IFTM,Moradabad,India
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
624
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）