Comparative Characteristic of Strength of Different Approaches to Cement Fixation of Therapeutic Component of Hip Joint in Endoprosthesis from Computer Modeling Positions
Izmalkov Sergey N.1, Bratiychuk Aleksandr N.1, Galeev Farid Sh.2, Usov Aleksey K.2,*, Kuropatkin Gennadij V.2
1Department of Traumatology, Orthopedics and Outpatient Surgery, Institute of Professional Education, Samara State Medical University, 89, Chapaevskaya Str., Samara, 443099, Russian Federation
2Department of Pediatric Traumatology, State Budgetary Healthcare Institution "Samara Regional Clinical Hospital Named after V. D. Seredina", 159, Tashkent Str., Samara, 443095, Russian Federation
*Corresponding Author E-mail:
Online published on 26 March, 2018.
Improvement of cement consolidation technologies of the components of the hip joint endoprosthesis is carried out not only based on the analysis of clinical and X-ray data, but also by computer modeling. The purpose of the study was to study the stress-strain state of the virtual endoprosthetized hip joint with various variants of the acetabular cement anchoring. The finite element method was used as a theoretical basis. The ANSYS computer program was used to construct the desired model. For calculations, a version of the model, this includes three segments: the acetabular component, the cement mantle and the spongy bone was created.
It is specified that in the acetabular component the stresses were equivalent and did not exceed 8.9 MPa for both six and two holes in the wall of the acetabulum. In the cement mantle, the stresses developed were divided radially and tangentially and did not exceed 2 MPa and 3 MPa, respectively. In terms of severity, they were similar for both six and two holes. In the spongy bone, the stresses also differentiated along the radial and tangential directions. However, here the magnitude of the stresses was greater at six holes than with two. According to the radial direction, this was 4 MPa and 1 MPa and 4.4 MPa and 2.2 MPa, respectively. In real orthopedic practice, among other equal conditions, during the cementation of the acetabular component, it is expedient to resort to the formation of only two blind holes, but in the most loaded zone of the acetabulum-in its tectum.
Cement fixation, Strength, Hip joint, Computer modeling, Endoprosthesis.