Doina Drǎgulescu +, Camelia Demian, Lucian Rusu, Aurel Rǎduţǎ, Mihaela Pepescu, Laurenţiu Roland Cucuruz, Radu Prejbeanu, Ioan Vida Simiti
May 28, 2013
The aim of the paper is to analyze a very common orthopedic implant fractured during its use and removed from the human body. The implant was analyzed by using optical and electronical metallography. The results of this study revealed the existence of nonmetallic inclusions which could promote the fracture initiation. The microstructural aspect indicates significant plastic deformations near the holes and the presence in the same places of crevice corrosion. In order to develop new types of plate implants, a Finite Element Analysis was performed on a similar plate. The optimal conditions for fixture were established by studying the stresses and strains distributions in the modeled plate. The three dimensional design of the surgical implants and the mechanical behaviour simulation under the external load will be useful to avoid the implant fracture and to better solve any problem concerning long bones implantation.