JP3056479B1 - Implant connection wire-rod - Google Patents

Abstract

The present invention provides a wire rod for connecting an implant, which can be easily attached to an implant during surgery and has a cushioning function after surgery. A pipe for receiving a set screw for connection to an implant or another related member is inserted into a rod body having a wire structure composed of wire strands, and the implant is connected to the pipe by a connecting means. Move to enable positioning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod mainly used for connecting a plurality of implants implanted in a plurality of vertebral bodies .

[0002]

2. Description of the Related Art Rods of this kind are used, for example, to connect implants implanted in a plurality of vertebral bodies, which have been damaged or lesioned, and to maintain a fixed positional relationship. However, in actual surgery, it is rare that all of the implants are oriented exactly in a certain direction, and it is necessary to perform difficult bending during the operation to attach a solid rod rod to it. became. For this reason, conventionally, it has often been troublesome to attach the rod, and there has been a problem that the bone is cracked when an excessive force is applied to the implant.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and an object of the present invention is to provide an implant connecting wire rod which can be easily attached to an implant during operation.

Another object of the present invention is to provide a rod for connecting an implant which can be referred to as a rod having a function of bending a wire or a wire having a rod function.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and the like, the present invention provides a rod body having a wire structure composed of a stranded wire of a wire, which is provided with a set screw for coupling with an implant or other related members. Insert the pipe to be received, move the implant on the pipe by connecting means to enable positioning , and further use the pipes to wire the rod cut end.
To cover and configure .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The implant connecting wire rod according to the present invention is used for connecting a plurality of implants implanted in a plurality of vertebral bodies . An implant is, for example, a screw-type pedicle, which has a threaded portion at one end for screwing into the bone and a coupling means at the other end for connection with a rod or other related member. Related members include a plate called an osteosynthesis plate, a connector, and an eye screw.

[0007] These implants are implanted by screwing into respective constituent bones such as cervical vertebra, thoracic vertebra, and lumbar vertebra. For this reason, it is rare that the connecting means of a plurality of implants implanted in each constituent bone are arranged in a straight line or two-dimensionally, and in most cases, they are in an irregular state.

In the present invention, a rod having a wire structure made of a stranded wire is used as a rod for connecting the connecting means of each implant. For the wire, a metal wire that does not harm the body tissue and does not deteriorate for a long time is used. The rod is flexible by having a wire structure, so that any irregularities in the position of the connecting means of the implant can be absorbed by the bending. Not only does it have the required rigidity as a rod, but also a plurality of implants can be fixed in their respective positional relations.

The flexible wire rod significantly reduces the time required to attach each implant during the procedure. On the other hand, the flexibility of being a wire rod allows some, if not very slight, movement of the implant and therefore of each bone. This movement is three-dimensional, but it can be seen that there is no axial stretching.

Since the implant or other related member is connected to the wire rod using a set screw, a pipe for receiving the set screw is inserted into the wire rod to secure the connection. Therefore, the pipe provides a connection portion with the implant, and a fastening force equivalent to that of the conventional rod can be obtained. It is desirable that such a pipe has a strength that is not easily deformed by the fastening force of the screw. Therefore, pipes can be caulked to the wire rod in advance by using an instrument, and an appropriate number of pipes can be arranged at required positions on the wire rod.

Since the wire rod is made of a stranded wire, there is a risk of acne due to the cut end. Therefore, it is effective to cover the wire at the cut end with the pipe. In this case, the pipe can use a cap having a previously closed end. Therefore, since the end cap is also used as one type of pipe, the pipe and the cap covering the cut end are referred to as pipes.
Call. The pipes and end caps have the same outer diameter as conventional rods, allowing them to fit into the coupling means of the implant as in the rods and to receive set screws. With the coupling means fitted to the pipe, the implant is movable in the axial direction of the pipe.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 shows a rod body 11 having a wire structure,
The end caps 13, 1 as pipes attached to both ends of the pipe 12 and the rod body 11 fitted therein.
3 ′, a wire rod 1 for implant connection
An example of 0 is shown.

The rod body 11 has a wire structure made of a stranded stainless steel wire. End cap 13, 1
3 'is a pipe closed at one end. These are all made of a metal material that is safe for body tissues. Since the end caps 13, 13 'are also used to receive set screws, just like pipes, the pipe 12 and end caps 13, 13' are attached to the rod body 11 by swaging as indicated at 14. Fixed. The caulking deformation 14 does not have to be on the entire circumference of the pipe as shown. Pipe 12
Also, a slightly widened insertion port 15 is provided in the end caps 13 and 13 ′ to facilitate insertion of the wire rod 11.

As shown in FIG. 3, such a wire rod 10 is fitted into a connecting means 18 at the other end of an implant 17 implanted in each vertebral body 16 and tightened by a set screw 19. The wire rod 10 absorbs the irregularity of the position of the connecting means 18 of the implant 17 by bending, and connects all the implants 17.

[0015] The wire rod 10 of the present invention to which the implant 17 is connected in this manner follows the movement of the spine well due to the flexibility of the wire. For example, the vertebrae expands and contracts or moves in a sine curve due to sneezing, coughing or yawning, and such a kind of cushioning movement can be ensured by the wire rod 10 of the present invention. The conventional solid rod-shaped rod does not have such a buffer function.

[0016]

Since the present invention is constructed and operates as described above, the implant can be easily attached during the operation, the time required for the operation can be reduced, and the burden on the patient can be reduced. After the operation, there is an effect that a plurality of vertebral bodies are not forced by the flexibility of the wire rod.

[Brief description of the drawings]

FIG. 1 is a perspective view of three examples of a wire rod for connecting an implant according to the present invention.

FIG. 2 is a sectional view of a main part of the above.

FIG. 3 is an explanatory diagram showing a use state.

Claims (4)

(57) [Claims] A rod for connecting a plurality of implants implanted in a plurality of vertebral bodies , the rod body having a wire structure composed of a wire strand of a wire connected to an implant or other related members. Insert the pipe that receives the set screw for the implant, move the implant on the pipe with the connecting means to enable positioning , and furthermore with pipes
A wire rod for connecting an implant , wherein the wire at the cut end of the rod is covered . 2. The implant connecting wire rod according to claim 1, wherein the pipe is caulked in advance to the wire rod using an instrument, and an appropriate number of pipes are arranged at required positions on the wire rod. 3. The implant connecting wire rod according to claim 1, wherein the rod body has a cap attached to an end, and the end cap has a pipe structure closed at one end. 4. The wire rod for connecting an implant according to claim 1, wherein the pipe and the end cap are provided with a slightly widened insertion port to facilitate insertion of the wire rod.