Modelling of a Stress-Strain State of Screws of Transpedicular Spine Fixation System

For maintenance of a spine stability during the postoperative period a transpedicular fixing of its elements is often used. Usually the transpedicular systems are formed of rods which as a result form a design of the frame type, fastening by screws to vertebras. Such design should be rigid and perceive loadings operating from the spine without essential deformations. From the perfection point of view of known designs their stress whole, and each of elements, in particular is of interest. In this study the modeling of the transpedicular screw is performed and estimation of its deformations taking into account interaction with a vertebra body having variable structure is made.

Authors:

• Oleksandr Poliakov
• Genadiy Olinichenko
• Yevgen Pashkov
• Vadym Kramar
• Mykhaylo Kalinin

Keywords:

• Spine
• screw
• stress-strain state
• transpedicular fixation system
• vertebra

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