Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
Intramedullary nail fixation is one of the useful treatments for subtrochanteric fracture. In many cases, long type of intramedullary nail is applied to treatment of subtrochanteric fractures. A middle intramedullary nail, which has an intermediate length between long type and short type, was developed because of the viewpoint of minimally invasive. It is important to examine biomechanical influences on length and diameter of the intramedullary nail systems subjected to various loads. The aim of this study was to investigate the influence of length and diameter of intramedullary nail for subtrochanteric fracture models with Seinsheimer classification IIB using finite element analysis (FEA). Four types of intramedullary nail were considered: nail diameter 10mm and 12mm in long type, and nail diameter 10mm and 12mm in middle type. Subtrochanteric fracture finite element (FE) models with fracture type IIB that each nail was implanted were developed. A 1-mm-thick callus layer was set in the gap between bone fragments of the femur. As a result of FE analysis, the effectiveness of nail diameter increase was indicated from the viewpoint of bone union.
