CN210009112U - A blunt-tipped metal bone needle - Google Patents

Abstract

The utility model discloses a metal spicule for orthopedics, in particular to a blunt-end metal spicule. The metal spicule comprises a tail part, a rod part, a thread part and a head part which are of an integral structure, and is structurally characterized in that the head part is a blunt head, cutting edges are arranged on the thread part and the head part, chip grooves are formed in the cutting edges, and a plurality of anti-skidding grooves which are arranged at intervals are formed in the rod part. The utility model has the advantages of blunt head and good protection of soft tissue.

Description

A blunt-tipped metal bone needle

technical field

The utility model relates to a metal bone needle for orthopedics, in particular to a metal bone needle with a blunt head.

Background technique

Metal bone pins are partially implanted into the human body for traction during fracture reduction or to play an internal fixation role in orthopaedic surgery. The head of the existing metal bone needle is pointed, which is easy to cause damage to the soft tissue when inserted into the bone and flesh, and is not suitable for use in hard cortical bone or areas where fractures have occurred before.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is to provide a metal bone needle with a blunt head, which can well protect the soft tissue.

The technical solution adopted by the present invention to solve the above problems is: the metal bone needle comprises a tail part, a rod part, a threaded part and a head part of an integrated structure, and its structural feature is that the head part is a blunt head, and the threaded part and the head part are blunt. There is a cutting edge, a chip removal groove is arranged at the cutting edge, and a number of anti-skid grooves arranged at intervals are arranged on the rod.

The thread on the thread part of the utility model is a single helical thread, and the bottom of the thread is arc-shaped.

The thread on the thread part of the utility model is a double helix thread, and the thread bottom is linear; and the diameter of the thread part gradually decreases from the rod part to the head direction.

The tail part of the utility model is provided with a plane groove.

Compared with the prior art, the utility model has the following beneficial effects: 1. The head of the metal bone needle is a blunt tip, which can well protect the soft tissue during use, and is suitable for hard cortical bone or areas where fractures have occurred before. , can be used for the fixation of the pelvis; 2. The arc-shaped design of the thread bottom on the thread part increases the contact area between the spicul and the bone, and reduces the radial cortical tension to make the stress in the bone optimally Because the stress distribution is all, it reduces the risk of damage to the cortical bone, which can effectively improve the anchorage of the bone needle, so that the bone needle is suitable for long-term indwelling in the body and avoid loosening; 3. Threaded teeth on the threaded part The linear design of the bottom and the double helical thread design allow bone fragments to be discharged from the bottom of the double helical thread, thereby improving the cutting ability of the thread.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a front view of Embodiment 1 of the present invention.

FIG. 3 is a top view of Embodiment 1 of the present invention.

FIG. 4 is a schematic structural diagram of Embodiment 2 of the present invention.

FIG. 5 is a front view of Embodiment 2 of the present invention.

FIG. 6 is a top view of Embodiment 2 of the present invention.

Detailed ways

Example 1:

Referring to FIG. 1 to FIG. 3 , this embodiment includes a tail portion 1 , a rod portion 2 , a threaded portion 3 and a head portion 4 of an integral structure. The head 4 is a blunt head, a cutting edge 5 is provided on the thread part 3 and the head 4, two chip removal grooves 8 are symmetrically opened at the cutting edge 5, and a number of anti-skid grooves 6 arranged at intervals are arranged on the rod part 2 , there is a flat groove 9 on the tail 1. The thread on the threaded portion 3 is a single helical thread, and the root 7 of the thread is arc-shaped.

This embodiment is used for cortical bone. When using it, drill holes with a bone drill first, and then install and fix metal bone pins. The chip flutes 8 are used to remove bone chips generated by the cutting edge 5 during cutting and provide a larger heat dissipation area for heat dissipation, and the anti-skid grooves 6 are used for anti-skid. The arc-shaped design of the thread bottom 7 on the thread part 3 increases the contact area between the spicules and the bone, and reduces the radial cortical tension to make the stress have the best distribution in the bone. Because the stress distribution is all, Therefore, the risk of damage to the cortical bone is reduced, and the anchorage of the bone pin fixation can be effectively improved.

Example 2:

4-6, this embodiment includes a tail portion 1, a rod portion 2, a threaded portion 3 and a head portion 4 of an integral structure, the head portion 4 is a blunt head, and the threaded portion 3 and the head portion 4 are provided with a cutting edge 5, The rod part 2 is provided with a number of anti-skid grooves 6 arranged at intervals, and a plane groove 9 is opened on the tail part 1 . The thread on the threaded portion 3 is a double helix thread, and the root 7 of the thread is linear; and the diameter of the threaded portion 3 gradually decreases from the rod portion 2 to the head portion 4 .

This example is used for cancellous bone, and the use method is the same as that of Example 1. The chip flutes 8 are used to remove bone chips generated by the cutting edge 5 during cutting and provide a larger heat dissipation area for heat dissipation, and the anti-skid grooves 6 are used for anti-skid. With the linear design and double-helix thread design of the thread bottom 7 on the threaded portion 3, bone fragments can be discharged from the double-helix thread bottom 7, thereby improving the cutting ability of the thread.

Claims (4)

1. The utility model provides a blunt metal spicule, includes afterbody (1), pole portion (2) and screw thread portion (3) and head (4) of integrative structure, characterized by: the head (4) is blunt, the cutting edges (5) are arranged on the thread part (3) and the head (4), the chip grooves (8) are arranged at the cutting edges (5), and the anti-skid grooves (6) which are arranged at intervals are arranged on the rod part (2).

2. The blunt metal needle of claim 1, wherein: the thread on the thread part (3) is a single spiral thread, and the tooth bottom (7) of the thread is arc-shaped.

3. The blunt metal needle of claim 1, wherein: the threads on the thread part (3) are double-helix threads, and the tooth bottoms (7) of the threads are linear; and the diameter of the thread part (3) is gradually reduced from the rod part (2) to the head part (4).

4. The blunt metal needle of claim 1, wherein: the tail part (1) is provided with a plane groove (9).

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