KR20130094921A

KR20130094921A - Spine fixator by shape memory alloy

Info

Publication number: KR20130094921A
Application number: KR1020120016185A
Authority: KR
Inventors: 오승환
Original assignee: (주)유어엠지
Priority date: 2012-02-17
Filing date: 2012-02-17
Publication date: 2013-08-27

Abstract

PURPOSE: A spinal fixation instrument using a shape memory alloy is provided to prevent an unnecessary damage in the spine, thereby speeding a recovery of spinal function. CONSTITUTION: A spinal fixation instrument is provided for fixing the spine of a human body. The spinal fixation instrument is made of a shape memory alloy having a plate structure. The spinal fixation instrument includes a body portion at the both ends, in which hooks are prepared for being hung on a surgical site. The spinal fixation instrument is transformed by changes of a body temperature.

Description

Spinal fixator by shape memory alloy

The purpose of the present invention is to provide a spinal fixation mechanism that prevents unnecessary vertebral damage by fixing the vertebrae using shape memory alloys, to simplify the procedure, shorten the procedure time, and maintain normal human tissue.

The present invention relates to a spinal fixation mechanism, and more particularly to a spinal fixation mechanism to perform a spinal fixation procedure using the characteristics of the shape memory alloy.

Spinal fixation device is a medical device commonly used in orthopedic or neurosurgery for the correction of the spine or fixation of the damaged part, and it is a rod connecting between a pair of screws fixed to the spine and both screws. A mechanism consisting of) is widely used.

Spinal fixation device having the configuration as described above is to cut the broken or malformed parts (vertebral scoliosis, spinal vertosis, etc.) of the vertebral disc, or in the wrong alignment of the spine, drilling on both sides around the site (Drilling) After the operation, the screw is driven and the rods are connected to each other using the rod. Therefore, the conventional spinal fixation mechanism is dangerous because the procedure itself is very complicated, it takes not only a lot of procedure time but also it is not easy to properly adjust the tightening force between the screw using the rod to cause a twisting phenomenon. In addition, a lot of bone damage occurs during the procedure

There is a problem

The present invention has been made to solve the above problems, by fixing the spine by using a shape memory alloy to prevent unnecessary vertebral damage, the procedure is simple, shorten the procedure time and maintain the normal human tissue to the maximum maintain the spine The purpose is to provide a mechanism.

Spinal fixation mechanism according to the present invention, the hook is applied to the corresponding treatment site of the spine is provided at both ends, the shape of the "C" shape, made of a shape memory alloy to provide a tightening force while transformed by the body temperature It is characterized by having a body.

The two hook portions have a pair of rounded portions that are substantially semicircularly curved.

It is designed to be fixed to pedicles, transverse processes, and lamina.

Alternatively, the two hooks may be configured to have a "C 'shaped bend in one or several according to size (Wave shape).

As another alternative, the instrument body may be of substantially "C" shape.

The hooks on both sides may be configured to be twisted at an angle of 80 to 130 °, and may be formed to be bent on the same plane.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 and 2).

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Fig. Figure 2 shows the appearance of the spinal fixation mechanism according to the first embodiment of the present invention.

Referring to Figure 1, the spinal fixation mechanism according to the first embodiment of the present invention is provided with a hook (Hook) at each end of the instrument body made of a shape memory alloy, between the two hooks

It is a structure that forms a shape similar to the shape of the “C” shape.

1 to 1 and 2 to 2 of FIG.

Here, the hook end of Figure 1 is made in the form of a concave-convex hook shape to be easily hooked to the pedicle (Pedicle) and the hook end of Figure 2 in a round shape, lamina or transverse process, spinous process (Spinous) It is designed to be easy to hang on the process.

In addition, the hooks on both sides may be formed in a bent structure while being substantially opposed to each other on the same plane, there may be various modifications.

The hook may be formed in a bent structure while substantially facing each other on the same plane, there may be a variety of modifications.

The surgical site fixed to each other by locking the hook, there is an advantage that can be performed according to the condition of the patient in a variety of spine.

Preferably, the mechanism body (part 3 of Figs. 1 and 2) between the hooks (1 to 1 in Fig. 1 and 2 to 2 in Fig. 1) has a substantially “C” shape or wave shape in order to increase the amount of deformation. Or Ω type, spring type, etc.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

By making the hook shape at both ends similar to the bone shape,

Designed to be fixed without damage

According to the present invention, the spine can be quickly recovered due to the minimal damage to the spine, and the procedure is provided by the internal temperature of the body within about 1 to 2 minutes, even if the instrument is placed on the site. Not only is it simple, but also the procedure time can be shortened compared with the prior art.

In addition, since the fixed part is fixed to the flat plate part (Fig. 1 and 4 part of Fig. 2) instead of the circular shape, it can prevent the phenomenon of digging into the bones of the fixed material of the circular shape little by little. It also has advantages.

Fig. 1

[Figure 2]

(Fig. 1, 2, 1,2): pedicle, pedicle (Lamian), transverse (transverse
digging into processes, spinous processes, etc.
Area to be fixed
(No. 3 in Fig. 1 and Fig. 2): The portion to be increased and decreased with temperature change during the procedure
(No. 4 in Fig. 1 and Fig. 2): It is treated by the tightening force,
Part to be clamped

The instrument body is made of, for example, a shape memory alloy composed mainly of a titanium nickel (TiNi) alloy is deformed in response to temperature changes. To this end, the instrument body is subjected to a shape memory process, which is bent by heating a wire or strip of a forming memory alloy or a plate of a predetermined length and bending at a temperature of 400 to 900 ° C. for 1 hour. During the shape memory heat treatment, or by performing shape memory heat treatment for 10 minutes or more at a temperature of 350 to 700 ° C. while restraining a wire or strip or plate to a jig corresponding to the shape to be stored. Here, the size and shape of the instrument body may have a variety of modifications corresponding to the size of the surgical site or tightening force.

The apparatus body manufactured as described above is easily separated by the distance between the two hooks (1 to 1 in FIGS. 1 and 2 to 2 in FIG. 2) in a martensite state of about 15 ° C. or less at a transformation temperature (Ms or Rs). The distance between the hooks is greater than the distance corresponding to the area to be fixed.

Subsequently, after about 1 to 2 minutes after the procedure, the temperature of the instrument body is increased by body temperature, and when the temperature is 30 ° C. or higher, the transformation body (Astenite) is transformed into an austenite state. As shown in Figure 1, Figure 2, the original shape, that is, to restore the shape before opening the mechanism body to provide a tightening force to the portion between the two hooks (1 to 1, 2 to 2 of Figure 2).

Claims

Fixing device for fixing the spine of the human body, consisting of a wire, a shape memory alloy of the plate structure, not in the form, both ends are provided with a mechanism body is provided with a hook to the corresponding surgical site of the spine, and transformed by the body temperature Spinal fixation apparatus characterized by providing a tightening force

The method of claim 1,
Spinal fixing mechanism is characterized in that between the two hooks are curled and the body is configured in a spring shape.

Spinal fixation mechanism in which the vertebrae of the vertebrae to be fixed and the fixing surface of the fixing device are in a flat plate shape rather than a circular shape

According to claim 2, Between the two hooks, a pair of first round portion is curved in a semi-circular extending from the hook; And a semicircular curved second round portion connecting the first round portions to each other while being perpendicular to the first round portion therebetween.

The method of claim 2,
Spinal locking mechanism, characterized in that between the two hooks are curled in a "C" shape or wave shape

The method of claim 1,
Spinal fixing device, characterized in that the instrument body is made of "C" shape

The method according to any one of claims 1 to 4,
Spinal fixing mechanism, characterized in that the hooks on both sides are twisted to form an angle of 80 ~ 130 °

The method according to any one of claims 1 to 4,
Spinal fixing mechanism characterized in that the hooks on both sides are bent while facing each other