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Distal femur cutting assembly and valgus positioning device

A positioning device and distal technology, which are applied in medical science, surgery and other directions, can solve the problems of large space required for intramedullary rod instruments, time-consuming and laborious processing, and high production costs, and achieve low production costs, convenient and reliable use and maintenance, and high reliability. Easy to disassemble and assemble

Active Publication Date: 2018-10-02
BEIJING NATON TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This valgus positioning structure is time-consuming and labor-intensive to process, which greatly increases the production cost. In addition, the spring structure makes it very difficult to thoroughly clean the instrument. Finally, the existing valgus positioning structure requires intramedullary rod instruments to operate. The space is larger, which increases the difficulty of the operation, so it needs to be improved

Method used

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  • Distal femur cutting assembly and valgus positioning device
  • Distal femur cutting assembly and valgus positioning device
  • Distal femur cutting assembly and valgus positioning device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0032] Such as figure 1 , figure 2 and image 3 As shown, the valgus positioning device in this embodiment includes a rotating plate 1 , a fixed plate 2 and an operating member 3 .

[0033] Wherein, the rotating plate 1 is a flat plate structure, and a through hole 13 is arranged at the center of the rotating plate 1, and two ear plates 14 are arranged on the upper and lower sides of the through hole 13, and each ear plate 14 is provided with a through hole. 140 , the centerlines of the two through holes 140 coincide, and the two through holes 140 are provided with a notch 141 at the same position, and the notch 141 is smaller than the inner diameter of the circular hole 140 and becomes the entrance of the circular hole 140 . A first adjustment part 11 and a second adjustment part 12 are respectively provided on the left and right sides of the through hole 13 , and both the first adjustment part 11 and the second adjustment part 12 extend along the vertical direction of the...

no. 2 example

[0042] The main structure of this embodiment is the same as that of the first embodiment, and the differences will be described below.

[0043] Such as Figure 7 and Figure 8 As shown, in this embodiment, both the first adjusting part 11 and the second adjusting part 12 are half convex and half concave, and the convex part and the concave part transition smoothly to form a slope. The unevenness of the first adjusting part 11 and the second adjusting part 12 relative to the inner surface of the rotating plate 1 is symmetrical with respect to the intersection of the center line of the through hole 13 and the inner surface of the rotating plate 1 . Both the first abutting portion 31 and the second abutting portion 32 are protrusions protruding from the operation member 3 .

[0044] In this embodiment, when the boss of the first abutment part 31 is located at the middle plane of the first adjustment part 11, the protrusion of the second abutment part 32 is located at the middle...

no. 3 example

[0052] In the above two embodiments, the operating member 3 is rotatably installed between the fixed plate 2 and the rotating plate 1 , but other implementations are also possible. For example, the first adjustment part 11 and the second adjustment part 12 on the rotating plate 1 are still designed to be convex or concave relative to the plane, but they are not arc-shaped, but linear. The way of sliding linear guide rail is to slide up and down between the fixed plate 2 and the rotating plate 1, and the sliding track is parallel to the turning line of the fixed plate 2 and the rotating plate 1. A positioning groove 22 is provided on the surface of the fixed plate 2 relative to the rotating plate 1 for adjustment and positioning of the operating member 3 . The first abutting part 31 of the operating member 3 cooperates with the first adjustment part 11 and the second abutment part 32 cooperates with the second adjustment part 12, and the projections of the first adjustment part...

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PUM

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Abstract

The invention discloses a distal femur cutting assembly and an ectropion positioning device. The ectropion positioning device comprises a rotation plate, a fixing plate, and an operation piece. An overturn axis is rotatably connected between the rotation plate and the fixing plate. The operation piece is clamped and abutted between the rotation plate and the fixing plate. An adjusting portion which is protruded or recessed relative to a plane is arranged in an extending manner on the rotation plane of the rotation plate, opposite to the fixing plate. The operation piece is provided with an abutting portion. throuGh the abutting portion cooperating with the adjusting portion, angle overturn between the rotation plate and the fixing plate is realized. When the operation piece rotates, through cooperation of a first abutting portion and a first adjusting portion and cooperation of a second abutting portion and a second adjusting portion, the fixing plate turns over relative to the rotation plate, and an included angle is formed between the two plates, so as to form an ectropion angle.

Description

technical field [0001] The invention relates to a distal femoral cutting assembly, in particular to the structure of a valgus positioning device in the distal femoral cutting assembly. Background technique [0002] The knee is the largest and most complex joint in the human body, and a total knee replacement is used for badly damaged knees. In total knee replacement surgery, articulating femoral and tibial components are implanted in the distal and proximal femur. In the human body, the femur protrudes distally in a medial manner at a valgus angle relative to the anatomical axis of the body, and the distal face of the femur has an intercondylar notch that is not planar, so the femur must be cut to conform to the corresponding prosthetic component. Size and shape to properly attach to prosthetic components. Wherein, "valgus angle" refers to the angle between the axis of the body and the channel under consideration, with respect to the femur, "valgus angle" refers to the ang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/56
Inventor 李文钊杨斌黄巨飞
Owner BEIJING NATON TECH GRP CO LTD
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