Bone nail and preparation method thereof

A bone nail and nail head technology, applied in the direction of nails, mechanical equipment, internal bone synthesis, etc., can solve problems such as inconsistent healing of degradation speed, loose fixation, and impact on firmness, and achieve good biomechanical properties, enhanced strength, and good organization. compatibility effect

Pending Publication Date: 2020-03-31
GENERAL HOSPITAL OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they all have problems such as long-term retention of fixation materials that lead to difficulty in reoperation, large differences in elastic modulus leading to bone resorption, and asynchronous process of material resorption and bone ingrowth leading to loosening of fixation.
For example, metal screws are used, because the elastic modulus of the metal screw is difficult to be consistent with the elastic modulus of the bone tissue at the bone graft. Once the bone is absorbed and the metal screw is exposed, the humeral head will be worn away, osteoarthritis will occur, and the postoperative efficacy will be affected. ;The threaded anchor is elastic fixation, and its fixation strength is lower than that of direct fixation with screws and absorba...

Method used

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  • Bone nail and preparation method thereof

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preparation example Construction

[0056] The specific embodiment part of the present invention provides the preparation method of the aforementioned bone nail, and the preparation method comprises the following steps:

[0057] (1) cutting the aggregate to be processed into broken bones;

[0058] (2) cutting it into longitudinal bone strips along the longitudinal axis of the broken bone described in step (1);

[0059] (3) Process the bone strip described in step (2) to make a bone nail.

[0060] As a preferred embodiment of the present invention, the length of the broken bone in step (1) is 28-40mm, preferably 28mm, 30mm, 32mm, 34mm, 36mm, 38mm or 40mm.

[0061] Preferably, the width of the bone strip in step (2) is 4mm.

[0062] Preferably, the processing described in step (3) is processing with a numerically controlled lathe.

[0063] Preferably, the bone nail in step (3) includes a nail body and a nail head, the nail body and the nail head are an integral structure, the nail body is in a cylindrical struc...

Embodiment 1

[0074] This embodiment provides a bone nail, such as figure 1 As shown, the bone nail includes a nail body 1 and a nail head 2, and a through hole 3 radially penetrating through the nail body is opened on the nail body 1 on the side of the nail head 2, and the material of the bone nail is For the allograft bone, the nail body and the nail head have an integral structure, and the nail body 1 and the nail head 2 do not have threads.

[0075] Wherein, the allogeneic bone comes from a bone bank, the nail body 1 has a cylindrical structure, its length is 28 mm, and the diameter of the nail body is 3.3 mm; the nail head 2 has a vertebral structure; the through hole 3 is a round hole, Its diameter is 1.5mm, and the center of the through hole is 7mm from the position of the nail head.

Embodiment 2

[0077] This embodiment provides a bone nail, the structure of which is the same as that in Embodiment 1 except that the length of the nail body is 32 mm, and the distance between the center of the through hole and the nail head is 6 mm.

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Abstract

The invention provides a bone nail and a preparation method thereof, the bone nail comprises a nail body and a nail head, a through hole penetrating through the nail body in the radial direction is formed in one side of the nail head on the nail body, and the bone nail is made of allogeneic bone. The allogeneic bone nail disclosed by the invention has good histocompatibility, bone conductivity andbone inductivity; and fusion of transplanted bone blocks and glenoid cavities and bone ingrowth are facilitated. The allogeneic bone nail has good biomechanical properties, the elasticity modulus isclose to that of a normal human skeleton, the influence on imaging examination is small, a receiving area and a supply area can be completely creeped and replaced, and the bone nail and the bone blockhave good osteogenesis activity.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a bone nail and a preparation method thereof, in particular to a bone nail used for repairing and repairing shoulder joint injuries and a preparation method thereof. Background technique [0002] The shoulder joint is the joint with the largest range of motion in the human body. The humeral head is larger and the labrum fossa is smaller, so the shoulder joint has a greater range of motion but also has greater instability. The shoulder joint diseases of middle-aged and elderly people are mostly rotator cuff injuries, Bankart injuries, SLAP injuries, and Hill-Sachs injuries, accounting for about 30% of orthopedic outpatient visits. They are common diseases that seriously affect the daily work and quality of life of middle-aged and elderly people. [0003] Bankart injury refers to the anterior inferior structure of the glenohumeral joint, including the anterior inferior part of the glen...

Claims

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Application Information

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IPC IPC(8): A61B17/86B21G3/00
CPCA61B17/861A61B17/864A61B2017/00526A61B2017/00831B21G3/00
Inventor 鹿鸣刘玉杰
Owner GENERAL HOSPITAL OF PLA
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