CN210009112U

CN210009112U - Blunt metal spicule

Info

Publication number: CN210009112U
Application number: CN201822241264.2U
Authority: CN
Inventors: 周建明
Original assignee: ZHEJIANG KANGCI MEDICAL TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG KANGCI MEDICAL TECHNOLOGY Co Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-02-04
Anticipated expiration: 2028-12-28

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

Blunt metal spicule

Technical Field

The utility model relates to a metal spicule for orthopedics, in particular to a blunt metal spicule.

Background

The metal spicules are partially implanted into a human body for traction when the fracture is reduced or play a role in internal fixation when the bone surgery is performed. The head of the existing metal spicule is a pointed end, so that the existing metal spicule is easy to damage soft tissues when being inserted into bone flesh, and is not suitable for being used in hard cortical bones or areas which are fractured before.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a metal spicule with a blunt head and capable of well protecting soft tissues.

The utility model provides a technical scheme that above-mentioned problem adopted is: 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 thread on the thread part of the utility model is a single spiral thread, and the bottom of the thread is arc-shaped.

The threads on the thread part of the utility model are double-helix threads, and the tooth bottom of the threads is in a straight line shape; and the diameter of the thread part is gradually reduced from the rod part to the head part.

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

Compared with the prior art, the utility model, following beneficial effect has: 1. the head of the metal spicule is blunt, so that soft tissues can be well protected when the metal spicule is used, the metal spicule is suitable for hard cortical bones or areas which have been fractured before, and can be used for fixing pelvic parts; 2. the arc-shaped design of the thread root on the thread part increases the contact area between the spicule and the bone, and the stress is optimally distributed in the bone by reducing the radial cortical tension, so that the risk of damage to the cortex of the bone is reduced, the anchoring property of the fixation of the spicule can be effectively improved, and the spicule is suitable for being detained in the body for a long time and is prevented from being loosened; 3. the linear design and the double-helix thread design of the thread root on the thread part can discharge bone fragments from the thread root of the double-helix thread, thereby improving the cutting capacity of the thread.

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 plan 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 plan view of embodiment 2 of the present invention.

Detailed Description

Example 1:

referring to fig. 1-3, the present embodiment includes a tail portion 1, a shank portion 2, and a threaded portion 3 and a head portion 4 of a unitary construction. The head part 4 is blunt, the thread part 3 and the head part 4 are provided with cutting edges 5, the cutting edges 5 are symmetrically provided with two chip grooves 8, the rod part 2 is provided with a plurality of anti-skid grooves 6 which are arranged at intervals, and the tail part 1 is provided with a plane groove 9. The thread on the thread part 3 is a single spiral thread, and the thread root 7 is arc-shaped.

The embodiment is used for cortical bone, and when the bone drill is used, a hole is drilled by the bone drill, and then the fixed metal bone needle is installed. The chip grooves 8 are used for removing bone chips generated by the cutting edges 5 during cutting and providing a large heat dissipation area for heat dissipation, and the anti-slip grooves 6 are used for preventing slip. The arc-shaped design of thread root 7 on screw thread portion 3 has increased the area of contact of spicule with the bone, makes stress have the best distribution in the bone through reducing radial cortex tension, because stress distribution is homogeneous, so reduced the danger to the bone cortex damage, can effectively improve the fixed anchoring nature of spicule.

Example 2:

referring to fig. 4-6, the present embodiment includes a tail portion 1, a shaft portion 2, a threaded portion 3 and a head portion 4, the head portion 4 is a blunt end, cutting edges 5 are disposed on the threaded portion 3 and the head portion 4, a plurality of anti-slip grooves 6 are disposed on the shaft portion 2 at intervals, and a planar groove 9 is disposed on the tail portion 1. The thread on the thread part 3 is a double-helix thread, and the tooth bottom 7 of the thread is linear; and the diameter of the threaded portion 3 gradually decreases from the shank portion 2 toward the head portion 4.

This example was used for cancellous bone in the same manner as in example 1. The chip grooves 8 are used for removing bone chips generated by the cutting edges 5 during cutting and providing a large heat dissipation area for heat dissipation, and the anti-slip grooves 6 are used for preventing slip. The rectilinear design and the double helical thread design of the thread root 7 on the threaded portion 3, bone fragments can be discharged from the root 7 of the double helical thread, thereby improving the cutting capacity of the thread.

Claims

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).