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Soft tissue balancing device in knee replacement and using method thereof

A technology of knee joint replacement and balance device, applied in the directions of knee joints, joint implants, joint implants, etc., can solve problems such as femoral injury, and achieve the effect of reducing injury

Pending Publication Date: 2020-08-18
BEIJING CHUNLIZHENGDA MEDICAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The first purpose of the invention is to solve the problem of excessive damage to the femur caused by multiple adjustments to the position of the prosthesis in knee arthroplasty

Method used

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  • Soft tissue balancing device in knee replacement and using method thereof
  • Soft tissue balancing device in knee replacement and using method thereof
  • Soft tissue balancing device in knee replacement and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as figure 1 and figure 2 As shown, a soft tissue balance device in knee joint replacement surgery includes a femoral fixation plate 1 that fits with the femur, an adjustment and positioning assembly 2 for positioning the drilling position, and a Two adjusting shims 3. figure 1 A schematic diagram of the balance device from the perspective of the direction of the knee joint viewed from the sole side of the human foot lying flat, with figure 1 The up, down, left, and right directions of the balance device are the up, down, left, and right directions in the full-text expression, and the side facing the reader in the figure is the front in the expression.

[0060] Such as figure 2 and image 3 As shown, the femoral fixation plate 1 is in the shape of a plate, and the back of the femoral fixation plate 1 is formed with waist-shaped grooves 4 near the left and right ends, and the length direction of the waist-shaped grooves 4 is along the up-down direction. The bo...

Embodiment 2

[0065] Such as Figure 6 As shown, a soft tissue balancing device for knee replacement surgery differs from Embodiment 1 in that an annular groove 29 is formed at the lower end of the adjusting bolt 31 . The two cylinders 27 are arc-shaped and snap into the annular groove 29 , and the radius of the arc surface of the two cylinders 27 facing each other is equal to the radius of the bottom surface of the annular groove 29 . The distance between the ends of the two cylinders 27 away from the adjusting gasket 3 is slightly smaller than the diameter of the bottom surface of the annular groove 29 .

Embodiment 3

[0067] A method for using a soft tissue balance device in knee joint replacement, comprising:

[0068] S1. Place the balance device

[0069] The femoral fixation piece 1 is attached to the cut end face of the femur, and the support adjustment piece 24 abuts against the side surface of the femur.

[0070] S2. Connect the balance device with the femur

[0071] Insert the screw 30 into the femur after passing through the perforation 7 on the femoral fixation plate 1, and connect the balance device with the femur.

[0072] S3, adjust the position of positioning block 9

[0073] Such as Figure 7 and Figure 8 As shown, by rotating the adjusting bolt 31, the adjusting gasket 3 is driven to move up and down. Since the adjusting gasket 3 has a certain plastic deformation capacity, when the original straight part of the adjusting gasket 3 moves downward to the transitional connection position between the standing abutment 11 and the curved leg abutment 12, the adjustment gasket 3...

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PUM

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Abstract

The invention relates to the technical field of medical instruments, in particular to a soft tissue balancing device in knee replacement and a using method thereof. The invention discloses a soft tissue balancing device in knee replacement. The device comprises a thighbone fixing sheet and an adjusting and positioning assembly, a kidney-shaped groove is formed in the surface of the thighbone fixing piece, a waist-shaped hole of which the size is smaller than that of each waist-shaped groove is formed in the bottom surface of each waist-shaped groove; the adjusting and positioning assembly comprises a positioning block with a bionic appearance and a connecting column connected to the positioning block, the diameter of the connecting column is smaller than the width of the kidney-shaped hole, a limiting piece is formed at the end, penetrating through the kidney-shaped hole, of the connecting column, the diameter of the limiting piece is larger than the width of the kidney-shaped hole andsmaller than the width of the kidney-shaped groove, and a positioning hole penetrating through the connecting column and the positioning block is formed in the middle of the connecting column. The position of the positioning block is adjustable, and when the condition that the pressure value of the knee joint is within a proper range is detected, a hole is drilled in the femur corresponding to the positioning hole. The repeated bone repairing and drilling are not needed, so that the injury to the thighbone can be reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a soft tissue balancing device for knee joint replacement and a method for using the device. Background technique [0002] Knee replacement is an artificial knee prosthesis made according to the shape, structure and function of human joints, which is surgically implanted into the human body to relieve joint pain and restore joint function. After knee replacement, if the medial and lateral collateral ligaments are loose or too tight, the knee can become unstable and can also lead to limited range of motion, poor tracking of the patella, uneven wear of the femur and tibia, arthritis, pain, and more. [0003] Therefore, the balance of soft tissue in knee arthroplasty directly affects the function of the knee joint after surgery. One technique that has been used in the past to balance collateral ligament tension in knee replacements is "ligament release," which cuts the fibe...

Claims

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Application Information

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IPC IPC(8): A61B17/17A61F2/46
CPCA61B17/1764A61F2/461A61F2/4657A61F2002/4666
Inventor 解凤宝史春宝石守娟
Owner BEIJING CHUNLIZHENGDA MEDICAL INSTR