A comparative mechanical study of two types of femur bone implant using the finite element method. (12th April 2021)

• Record Type: Journal Article
• Authors: Hamidi, Saeideh; Khosravifard, Amir; Hematiyan, Mohammad Rahim; Dehghani, Javad
• Is Part Of: International journal for numerical methods in biomedical engineering. Volume 37:Number 6(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-04-12
• Subjects: femoral bone -- femoral neck -- finite element analysis -- implant -- intertrochanteric -- subtrochanteric; Biomedical engineering -- Periodicals; Imaging systems in medicine -- Periodicals; Numerical analysis -- Periodicals; Engineering mathematics -- Periodicals; 610.28
• DOI: 10.1002/cnm.3459
• Languages: English
• ISSNs: 2040-7939

Abstract

Abstract: The femoral bone fracture is one of the most common fractures that orthopedic surgeons deal with. These fractures are associated with a significant percentage of death due to non‐orthopedic complications. For this reason, it is necessary that the surgeon be well‐aware of the condition of the patient and also of the biomechanical conditions of the bone and implant before surgery, in order to use the best surgical technique. Nowadays, the use of implants is a popular technique among the available methods for the treatment of femoral fractures. In the present study, two patients with different ages, three types of femoral bone fractures, that is, oblique, reverse oblique, and neck fracture, and two types of implants, namely, the dynamic hip screw (DHS) and the Gamma nail have been investigated. The behavior of the implants has been investigated at the two stages of treatment, that is, before and after bone union. The analysis of implants was based on the amount of stress and displacement induced in different parts of the bone and the implant. From the viewpoint of the stresses induced in the bone, all models are quite similar and in terms of the implant stresses, the Gamma nail is more reliable than the DHS. Additionally, the relative displacement of the fractured bone segments at the fracture planes was calculated. According to the obtained results, it can be concluded that the relative displacement of the fracture planes with the use of Gamma nail is somewhat less than the DHS, but this difference is not significant. Abstract : Two different implants for treatment of various fractures of femoral bone for different ages are compared in terms of biomechanical parameters. The stress distribution in the bone as well as the implant is compared for determination of the safety of implant and bone. Also, for assessing the fixity provided by the implant, the bone deformations and relative motion of the fractured planes are obtained.