Combined type percutaneous zygopophysis pedicle screw internal fixation system
A technology of pedicle screw and fixing system, applied in the field of medical devices, can solve the problems of poor effect, high production cost, many special equipment and the like
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[0022] Such as Figure 1 to Figure 6 As shown, the composite percutaneous facet pedicle screw internal fixation system includes a positioning sheath for determining the screw placement angle and body surface position and a corresponding inner core, a guide pin for determining the screw placement depth, and a Dilators for enlarging the channel for placing nails on the body surface, medical hollow drills and drilling tools for drilling bones, tapping screws, screw sets and pedicle screws;
[0023] Wherein the expander includes a first long tube and a second middle tube sleeved outside the first long tube, the second middle tube is positioned on the first long tube through a lock pin; A fan-shaped leaf on the body surface, the fan-shaped leaf is formed by sliding fit of several fan-shaped units;
[0024] The drilling tool is a hollow rod, which is divided into a first threaded section, a second threaded section, a limit ball head and a smooth rod section from the front end to th...
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