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Metal bone needle

A technology of bone needles and metals, applied in internal bone synthesis, medical science, internal fixators, etc., can solve problems such as easy movement into joints, poor fixation effect, and limited screw holding force, so as to shorten the time of fracture fixation and facilitate surgery. Effects of cost reduction and shortened operation time

Pending Publication Date: 2021-04-06
ZHEJIANG KANGCI MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Kirschner wire is easy to operate, it has the following disadvantages: bone fragments are not firmly fixed, easy to slide and rotate; strong toughness, easy to bend and cause bone fragments to move; after fixation, they are easy to move into joints or go out of the skin to cause infection
Although ordinary screws have a certain holding force, they still have the following disadvantages: the operation process is complicated, pre-drilling is required, and bone fragments are pressed in advance, which will lose a certain amount of bone. Limited, especially poor fixation in cancellous bone; may cause comminution of bone fragments; not suitable for smaller bone fragments

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] see Figure 1-Figure 2 , the present embodiment includes a stem part 1, a threaded part 2 and a head 3 of an integral structure, the thread of the threaded part 2 is a single-thread thread, the head 3 is a self-tapping drill bit, and the self-tapping drill bit is a triangular pyramid-shaped tip, and the stem part 1 The diameter is greater than the diameter of the threaded part 2, and a frustum-shaped shoulder 4 is provided between the rod part 1 and the threaded part 2, and the inclination angle of the shoulder 4 is 68°.

[0024] The shoulder 4 between the shank 1 and the threaded part 2 is similar to the screw tail of an ordinary screw, and if necessary, the size of the shoulder 4 can be increased by using a washer to facilitate compression. The threads of the threaded part 2 can be provided with lengths and diameters of different specifications, so as to be suitable for bone blocks of different parts and sizes.

[0025] see Figure 3-Figure 4 When used in this embod...

Embodiment 2

[0027] see Figure 5-Figure 6 , the present embodiment includes a stem part 1, a threaded part 2 and a head 3 of an integral structure, the thread of the threaded part 2 is a double-thread thread, the head 3 is a self-tapping drill bit, and the self-tapping drill bit is a triangular pyramid-shaped tip, and the stem part The diameter of 1 is larger than the diameter of the threaded part 2, and a frustum-shaped shoulder 4 is provided between the rod part 1 and the threaded part 2, and the inclination angle of the shoulder 4 is 68°. The diameter of the threaded part 2 gradually decreases from the stem part 1 to the head 3, and the threads on the threaded part 2 gradually increase from the stem 1 to the head 3.

[0028] The shoulder 4 between the shank 1 and the threaded part 2 is similar to the screw tail of an ordinary screw, and if necessary, the size of the shoulder 4 can be increased by using a washer to facilitate compression. The threads of the threaded part 2 can be provi...

Embodiment 3

[0031] see Figure 9-Figure 10 , this embodiment This embodiment includes a rod part 1, a threaded part 2 and a head 3 with an integral structure, the thread of the threaded part 2 is a double thread thread, the head 3 is a self-tapping drill bit, and the self-tapping drill bit is a triangular pyramid-shaped tip , The diameter of the rod part 1 is greater than the diameter of the threaded part 2, a frustum-shaped shoulder 4 is provided between the rod part 1 and the threaded part 2, and the inclination angle of the shoulder 4 is 68°. A cutting edge 5 is provided on the threaded part 2 and the head 3, and a chip removal groove 6 is provided at the cutting edge 5, and the threads on the threaded part 2 gradually increase from the rod part 1 to the head 3.

[0032] The shoulder 4 between the shank 1 and the threaded part 2 is similar to the screw tail of an ordinary screw, and if necessary, the size of the shoulder 4 can be increased by using a washer to facilitate compression. ...

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Abstract

The invention discloses a metal bone needle for the orthopedics department. The metal bone needle comprises a rod part, a threaded part and a head part which are of an integrated structure, and is structurally characterized in that the head part is a self-tapping drill bit, the diameter of the rod part is greater than that of the threaded part, and a circular-truncated-cone-shaped shoulder part is arranged between the rod part and the threaded part; the diameter of the threaded part is gradually reduced from the rod part to the head part, and the thread on the threaded part is gradually increased from the rod part to the head part; and cutting edges are arranged on the threaded part and the head part, chip grooves are formed in the cutting edges, and the thread on the threaded part is gradually increased in the direction from the rod part to the head part. The metal bone needle has the advantages of no need of drilling in advance, no bone tissue loss, soft tissue protection, simplicity and convenience in operation and reliability in fixation.

Description

technical field [0001] The invention relates to a metal bone needle for orthopedics. Background technique [0002] When the fracture is reduced, Kirschner wires or ordinary screws are usually implanted into the human body for traction or internal fixation during orthopedic surgery. Although the Kirschner wire is easy to operate, it has the following disadvantages: the bone fragments are not firmly fixed, and are easy to slide and rotate; they are tough and easy to bend to cause the movement of the bone fragments; Although ordinary screws have a certain holding force, they still have the following disadvantages: the operation process is complicated, pre-drilling is required, and bone fragments are pressed in advance, which will lose a certain amount of bone. The screw thread spacing is relatively large, so the holding force of the screw Limited, especially poor fixation in cancellous bone; possible comminution of bone fragments; not suitable for smaller bone fragments. Con...

Claims

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Application Information

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IPC IPC(8): A61B17/68A61B17/16
CPCA61B17/1615A61B17/683A61B2017/564
Inventor 周建明
Owner ZHEJIANG KANGCI MEDICAL TECH
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