Femoral neck bidirectional pressurizing distance-limiting sliding screw and screwdriver

A two-way compression, femoral neck technology, applied in the field of medical devices, can solve problems such as insufficient internal fixation for femoral neck fractures, and achieve the effect of strong practicability

Pending Publication Date: 2021-05-14
SOUTHERN MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hip-preserving treatment of femoral neck fractures is still controversial. Different internal fixation devices for femoral neck fractures have emerged in the domestic and foreign markets, which is enough to show that the internal fixation devices for femoral neck fractures are still not perfect.

Method used

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  • Femoral neck bidirectional pressurizing distance-limiting sliding screw and screwdriver
  • Femoral neck bidirectional pressurizing distance-limiting sliding screw and screwdriver
  • Femoral neck bidirectional pressurizing distance-limiting sliding screw and screwdriver

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The femoral neck two-way compression distance-limited sliding screw of embodiment one:

[0032] Such as figure 1 and figure 2 As shown, the femoral neck bidirectional compression distance-limited sliding screw according to the embodiment of the present invention includes an inner core 11 , an outer sleeve 21 and a connection part arranged at the tail of the outer sleeve 21 . Wherein, the head of the inner core 11 is provided with a first external thread 13, and the tail of the outer sleeve 21 is provided with a second external thread 22, and the pitch of the second external thread 22 is different from that of the first external thread 13. It should be noted that the head and tail orientation It is based on the orientation or positional relationship shown in the drawings, and should not be construed as limiting the present invention.

[0033] Such as figure 2 As shown, the tail of the inner core 11 is connected to the head of the outer sleeve 21 through a connection...

Embodiment 2

[0039] The femoral neck two-way compressive limited-distance sliding screw of embodiment two:

[0040] refer to Figure 3 to Figure 6 , showing the femoral neck two-way compression distance-limiting sliding screw of embodiment two, the difference from embodiment one lies in the specific mechanism of the restricted assembly, the restricted assembly of embodiment two includes an inner tail cap 31 that is limited to move in the accommodation cavity 23 , the inner tail cap 31 is screwed to the tail of the sliding rod 12, and the first limiting surface 24 and the second limiting surface are respectively used to limit the two ends of the inner tail cap 31. It can be understood that the inner tail cap 31 is a hexagon socket head bolt, and the outer diameter of the head of the inner tail cap 31 is not smaller than the diameter of the circumscribed circle of the shaft hole, thereby forming the first limiting surface 24 of the accommodation cavity 23 for the inner tail cap 31 to abut ag...

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PUM

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Abstract

The invention discloses a femoral neck bidirectional pressurizing distance-limiting sliding screw and a screwdriver, and relates to the technical field of medical instruments. The femoral neck bidirectional pressurizing distance-limiting sliding screw comprises an inner core, wherein the head of the inner core is provided with a first external thread; an outer sleeve, wherein the tail of the outer sleeve is provided with a second external thread, the thread pitch of the second external thread is different from that of the first external thread, the tail of the inner core is connected with the head of the outer sleeve through a connecting structure and can slide relative to the axial direction, and the outer sleeve is provided with a distance limiting structure to limit the relative sliding distance between the inner core and the outer sleeve; and a connecting part, which is arranged at the tail of the outer sleeve. The first external thread of the inner core and the second external thread of the outer sleeve can enable the fracture end of the femoral neck to play a bidirectional pressurizing role in the process of entering the proximal femur through the double-thread structure, and the stability of the fracture end is improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a femoral neck two-way compressive distance-limited sliding screw, and also relates to a screwdriver. Background technique [0002] Currently, femoral neck fractures account for 3.85% of adult fractures. It is a common fracture that can occur in all age groups. Nonunion and avascular necrosis of the femoral head after femoral neck fractures have always been difficult in trauma orthopedic treatment. At present, the hip-preserving treatment of femoral neck fractures is still controversial. Different internal fixation devices for femoral neck fractures have emerged in the domestic and foreign markets, which is enough to show that the internal fixation devices for femoral neck fractures are still not perfect. [0003] In recent years, the complication of femoral neck shortening after femoral neck fracture has aroused everyone's attention and thinking. Excessive shortenin...

Claims

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Application Information

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IPC IPC(8): A61B17/76A61B17/88
CPCA61B17/74A61B17/8875
Inventor 黄海欧阳钧冯正宽
Owner SOUTHERN MEDICAL UNIVERSITY
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