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Intramedullary fixing device for radial head fractures

A fixation device and technology of radius, applied in the field of radial head fracture fixation device, can solve problems such as elbow joint mismatch, bone fragment displacement, failure, etc., and achieve the effects of avoiding joint replacement, simple operation, and firm fixation

Pending Publication Date: 2020-11-10
陈聚伍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the comminution of some radial head fractures, some Mason type 3 and Mason type 4 radial head fractures or combined radial neck fractures could not be fixed with conventional internal fixation, and were eventually discarded, thus losing the integrity of the radial head and humerioradial articular surface, affecting the The stability of the elbow joint and the matching degree of the humeroradial joint, while the conventional internal fixation device still fails after fixation, and the bone fragments shift during and after the operation, which increases the incidence of heterotopic ossification and traumatic arthritis
If the operation fails, radial head replacement is required, which will increase the cost of the operation, and may cause problems such as secondary revision, elbow stiffness, and elbow mismatch in the future

Method used

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  • Intramedullary fixing device for radial head fractures
  • Intramedullary fixing device for radial head fractures
  • Intramedullary fixing device for radial head fractures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: a kind of as Figure 5-Figure 9 The shown intramedullary fixation device for radial head fractures includes a mandrel 1 , a mandrel fixing screw 7 and a small head radial fixing screw 6 , which are sleeved in the bone cavity of the radial body 8 . In this embodiment, the core rod 1 is a cylindrical structure such as Figure 5 shown.

[0025] Figure 1-Figure 4 It can be seen that the rod body of the mandrel 1 is provided with a mandrel fixing hole 2 and is fixed at a corresponding position in the bone cavity of the radial main body 8 by the mandrel fixing screw 7 . image 3 , the outer end of the mandrel 1 is inserted into the bone cavity of the radial head 9 . Small-head radial fixing holes 4 are distributed on the plug peripheral surface at the outer end of the core rod 1 . In this embodiment, three small-head radial fixing holes are distributed along the radial direction and at intervals of 120 degrees. Such as Figure 4 , the small head radial fix...

Embodiment 2

[0029] Embodiment 2: On the basis of Embodiment 1, compared with Embodiment 1, the core rod plug is set in a cylindrical or approximately cylindrical shape, and the radial fixing holes of each small head are distributed on the peripheral surface of the cylinder. In this embodiment, the plug is located at the position of the plug of the core rod, and the plug is set in a spherical shape, and there are small radial fixing holes at different angles on the spherical surface, so as to meet the selection requirements for the combination of multiple bone fragments.

Embodiment 3

[0030] Embodiment 3: On the basis of Embodiment 2, relative to the spherical plug described in Embodiment 2, in this embodiment, the plug of the core rod is smaller than the main body of the core rod, and a spherical plug is installed at the outer end of the core rod, that is, the core rod body is smaller than the spherical plug. The plug is installed in combination, and there are two processing methods for the spherical plug in this embodiment. The first processing method has small radial fixing holes at different angles on the spherical surface as shown in Embodiment 2; the second processing method is Using hard materials that can be tapped by self-tapping screws, the front section of each small-head radial fixed screw is a self-tapping section, which penetrates the bone from the outside of the radial head to the inside and is connected to the spherical plug to meet the requirements Selection requirements for multi-skeleton combinations.

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Abstract

The invention discloses an intramedullary fixing device for radial head fractures. The intramedullary fixing device comprises a core rod sleeved with a radius main body bone cavity, a rod body of thecore rod is provided with a core rod fixing hole and is fixed to the corresponding position in the radius main body bone cavity through a core rod fixing lead screw, and the outer end of the core rodis inserted into a radius head bone cavity; and small head radial fixing holes are distributed in the circumferential face of a plug at the outer end of the core rod, and small head radial fixing leadscrews penetrate through sclerotin inwards from the outer side of a radial head and then are connected into the small head radial fixing holes. The device belongs to intramedullary fixation, is simple to operate and firm in fixation, is particularly suitable for fixation of radial head comminuted fractures, can respectively perform convergent fixation on bone pieces from different angles, avoidsunnecessary joint replacement, and reserves and recovers the radial head of a patient as much as possible.

Description

technical field [0001] The invention belongs to the field of fixation devices for radial head fractures, in particular to an intramedullary fixation device for radial head fractures. Background technique [0002] Fracture of the radial head is a clinically frequent injury. The axial and lateral forces that cause the fracture of the radial head are high-energy violence, resulting in invagination, fragmentation and separation of the articular surface, comminution of metaphyseal bone, and often combined with fractures in other parts of the forearm. The prognosis is poor. Fractures of the radial head (comminuted or very short proximal end) are difficult to fix, often resected, affect the function of the forearm, and plate fixation is difficult. Traditional treatment of such fractures includes: closed reduction, plaster external fixation, internal fixation with gram needles, radial head resection, radial head replacement, etc., but there are poor reduction of the articular surfa...

Claims

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Application Information

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IPC IPC(8): A61B17/72
CPCA61B17/7233A61B17/72A61B2017/564
Inventor 陈聚伍
Owner 陈聚伍
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