Лунев Юрий Константинович (RU),Грамолин Константин Витальевич (RU)
申请号：
RU2014128693/14
公开号：
RU00151639U1
申请日:
2014.07.11
申请国别(地区):
RU
年份:
2015
代理人:
摘要：
The invention relates to medicine, namely to the Spine, neurosurgery, orthopedics, traumatology, in particular to the field of monoaxial pedicle screws and nuts that make up the spinal fixation devices. Summary of the utility model is that the device monoaxial pedicle screw comprises a screw and a nut. The screw has a working part with a thread and a head having a blind hole with internal thread and abutment groove for insertion therein of the longitudinal rod. The nut includes an external thread corresponding abutment thread on the screw head and an element which allows to apply torque to screw the nut in the screw head in the form of an internal hexagon. At the end of the nut, which may come into contact with the longitudinal rod, an annular rib performed. For a better fit of the annular rib to the longitudinal rod surface roughness of the annular rib may be formed into two classes lower than the surface roughness of the other nut, and an annular rib may have an angle of 90 °. The angle of the male buttress thread nut and the internal thread in the screw head may be 3 °, that will ensure the impossibility of spontaneous unscrewing and loosening fixing nut longitudinal rod. The thread profile of the working part of the screw is variable and a non-isosceles trapezoid, and the trapezoid base decrease from the screw head to its tip. Angles scalene trapezium thread profile of the working part of the screw may be 10 ° and 40 °. The thread profile of the working part of the screw can vary from moment trapezoidal to triangular screw head at its tip. The outer diameter of the working part of the screw is constant, but decreases from the inner to the tip of the head. For ease of installation devices monoaxial pedicle screws at the screw head formed two parallel flattenings. All parts of the device monoaxial pedicle screws are made of biocompatible titanium alloy.Полезная модель относится к медицине, а именно к вертебрологии, нейрохирургии, ортопедии, травматологии, в частно
