Найдено научных статей и публикаций: 2, для научной тематики: Intramedullary nail
1.
Dmitry Ivanov, Anatoly Barabash, Yuri Barabash
- Russian Open Medical Journal , 2016
This article reviews studies of Fixion expandable nail biomechanical properties in case of long bones fractures osteosynthesis. The purpose of this study was to systematize biomechanical researches dedicated to the expandable nail. There were found seven biomechanical studies published between 2005 ...
This article reviews studies of Fixion expandable nail biomechanical properties in case of long bones fractures osteosynthesis. The purpose of this study was to systematize biomechanical researches dedicated to the expandable nail. There were found seven biomechanical studies published between 2005 and 2008. Among them, six studies are devoted to mechanical experiments, and one is a comment to the published study. In four papers, the authors compared biomechanical properties of expandable and locked nails.
Expandable nail proved to be a highly effective device for fixation of long bone fractures. However, in case of mid-shaft fractures Fixion nail was significantly less stable than standard locked nails. This conclusion was obtained for humeri, tibia and femur. Stiffness of bone-implant system for expandable nail in case of torsional loads was significantly lower than the similar parameter of standard implant in case of transverse fracture models.
Expandable Fixion nail rod should be used with great caution for osteosynthesis of long bones transverse shaft fractures. In contrast, in the case of oblique and spiral fractures, when contact area between fragments is sufficiently high and can share loads between nail and bone fragments, the expandable nail should be used.
Dmitry Ivanov, Anatoly Barabash, Yuri Barabash Expandable intramedullary nail: review of biomechanical studies // Russian Open Medical Journal, Vol. 5, Issue 2, 2016, pp. 0-0
2.
Dmitry Ivanov, Anatoly Barabash, Yuri Barabash
- Russian Open Medical Journal , 2015
This article presents new intramedullary (IM) nail design for femur diaphyseal fractures osteosynthesis. Biomechanical comparison of the two IM nails (standard locking and new developed) was conducted. Femur medullary canal architectonics was studied with the help of computer tomography (CT) data. T...
This article presents new intramedullary (IM) nail design for femur diaphyseal fractures osteosynthesis. Biomechanical comparison of the two IM nails (standard locking and new developed) was conducted. Femur medullary canal architectonics was studied with the help of computer tomography (CT) data. Three-dimensional (3D) models of the femur, its transverse fracture, standard locking nail and new developed nail were constructed as well as the bone-implant system models. Stress-strain state of the bone-implant systems under three types of loads (axial, lateral and torsional) was studied using finite-element method in commercial software Ansys 14.0.
Numerical results showed that new nail allows proximal fragment of the bone to move in an axial direction. New nail provides necessary compression at fragments junction. It was revealed that the highest values of effective stress (ES) for the standard nail were concentrated at contact area between locking screws and nail for all investigated loads. For the new nail the highest values of ES were concentrated on its body and blades at proximal region. Moreover, stresses occurred in the new nail were smaller than stresses appeared in the standard nail. This conclusion is valid for three investigated types of loads. So the new nail does not have serious disadvantages of standard nails.
From the biomechanical point of view the new nail is more preferable for diaphyseal femur fractures osteosynthesis.
Dmitry Ivanov, Anatoly Barabash, Yuri Barabash Preclinical biomechanics of a new intramedullary nail for femoral diaphyseal fractures // Russian Open Medical Journal, Vol. 4, Issue 2, 2015, pp. 0-0