The Effct Of Mechanical Excitation On Bone Growth In Children

Femoral head necrosis is a common bone and joint disease,which often leads to severe hip dysfunction.Femoral head necrosis is one of the common and refractory diseases.The reasons of femoral head necrosis are mainly attributed to the fracture of the femoral neck fracture reduction,bone tissue lesions itself and teenagers’ femoral head epiphyseal necrosis in the growth and development and so on.At present,the analysis of etiology of femoral head necrosis is mainly from the patient’s physiological factors and clinical conditions,but also some articles from the mechanical factors on the adults’ location of the lesion.This paper is based on the application of biomechanics to study growth process of children’s bone from the perspective of mechanics,and analyze mechanical factors that leads to femoral head necrosis of children’s bone growth process at the same time.In view of the necrosis of femoral head in children,this paper presents a study on the problem of bone growth in children.This paper analyzes the material characteristics and structural characteristics of the femur in children,and uses the modeling software to model the femur morphology of children and carry out the gait load analysis of the normal walking state of children.Therefore,this paper designed a set of cycle load conditions when children walk.According to the bone control equation and the bone growth control equation,combined with the theory of bone mechanics,a set of control equations of bone growth external structure and internal property change at the same time is compiled.The feasibility of the scheme is verified by ABAQUS finite element analysis.Based on the simulation results of bone growth process,this paper analyzes the mechanical factors of the femoral head necrosis in children by simulating the initial elastic modulus of each part of the femoral head and the value of the gait load acting on the femoral head.It was found that the change of bone and cancellous bone in the femoral head could affect the size of bone deformity,which was suggested that the bone tissue mechanical parameters could affect necrosis of the femoral head.The greater the gait load is,the greater impact on the deformation of the femoral head in children is,which indicates that the gait load is also the factor of femoral head necrosis.The significance of this topic is to achieve the simultaneous simulation of entire femoral head of the external shape and internal material characteristics based on bone reconstruction and bone growth theory.Then analyze the reason of femoral head necrosis in the material properties and structural characteristics of two aspects by the simulation,explaining the pathogenesis of necrosis of the femoral head in children in mechanics,to provide available data support for the prevention and treatment of the disease.