KR100859746B1 - Implant - Google Patents

Abstract

A medical prosthesis is provided to improve operation stability and a prosthetic support power by preventing filled hardening liquid from falling from an operation part to the outside and increasing the strength of the filled hardening liquid. A medical prosthesis includes: a prosthetic filling material(2) for prosthesis of a fracture part(G); and a reinforcing wire structure(4) having a filling space(6) filled with the prosthetic filling material, and an external surface with fastening gaps between wires formed by winding or weaving the wires in the state of wrapping around the filling space. The prosthetic filling material is medical bone cement.

Description

Medical implants {implant}

1 is a view for explaining the state of use of the medical implant according to an embodiment of the present invention.

2A is a view for explaining the overall structure of the medical implant according to an embodiment of the present invention.

FIG. 2B is a side cross-sectional view of FIG. 2A.

3 is a view for explaining the structure of the reinforcing wire structure of FIG.

4 is a view for explaining another structure of the binding gap formed on the outer surface of the reinforcing wire structure of FIG.

5 is a view for schematically explaining a process of inserting the reinforcing wire structure in the fracture site of the spine in FIG.

FIG. 6 is a view for schematically explaining a process of injecting the prosthetic filler in the fracture site of the spine in FIG. 1.

7 is a view for explaining another embodiment of the reinforcing wire structure of a medical implant according to an embodiment of the present invention.

8 is a view for explaining the cover member structure of the medical implant according to an embodiment of the present invention.

9 is a view for explaining a state of use of the cover member of FIG.

The present invention relates to a medical implant, and more particularly, to a spinal restoration procedure for correcting a damaged area (fracture site) of a vertebral bone, and more particularly, to a medical implant that can secure improved surgical stability and corrective support. .

In general, bone cement is one of the medical implants used as a filling hardening liquid in the restoration procedure to correct fractures of the spine.

The cement is applied to the fracture site of the spine by a tubular insertion device such as a conventional balloon catheter.

That is, after opening the fractured portion of the vertebral bone with the balloon member of the balloon catheter in its original state, the bone cement is injected through the inner passage of the catheter to fill the fractured portion of the vertebral bone.

Thus, the bone cement is hardened in a state filled inside the fracture site of the vertebral bone so that the fracture site of the vertebral bone remains corrected.

However, since the bone cement implants may easily flow to the outside in the state of filling the fracture site of the vertebral bone during the restoration of the spine, it is difficult to perform the procedure.

In particular, when the present cement is discharged outside the fracture site of the vertebral bone, it may be a factor causing serious side effects on the human body. For example, it can cause nerve and spinal cord compression, myocardial infarction, cardiac arrest, and cerebrovascular disorders.

In addition, it is difficult to secure satisfactory prosthetic support force only by the bone cement filled and cured at the fracture site of the vertebral bone.

Thus, the bone cement filled and cured inside the fracture site can be easily cracked and broken by continuous pressure or load, thereby causing the fracture symptoms of the spine to recur.

The present invention has been made to solve the conventional problems as described above, an object of the present invention, while preventing the phenomenon that the filling cured liquid flows to the outside at the spine surgery site while increasing the strength of the filling cured liquid It is to provide a medical implant that can be provided with a means that can be improved to obtain improved surgical stability and prosthetic support.

In order to realize the object of the present invention as described above,

Implants that are filled in the fractured areas of the vertebral bone so that the fracture site remains in its original form,

Prosthetic filling material for prosthesis of fracture site;

A reinforcing wire structure having a filling space for filling the prosthetic filling material and having an outer surface formed with binding gaps between the wires by winding or weaving wires in a state surrounding the filling space;

To provide a medical implant comprising a.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention are described to the extent that those of ordinary skill in the art can practice the present invention.

Therefore, since the embodiments of the present invention may be modified in various other forms, the claims of the present invention are not limited to the embodiments described below.

1 and 2a, 2b is a view for explaining the state of use and overall structure of the medical implant according to an embodiment of the present invention, 2 denotes the filling material for the prosthesis, 4 is a reinforcing wire Refers to a structure.

The prosthetic filler 2 is filled in the fractured area (G, hereinafter, "fracture site") of the body vertebral bone, as shown in Figure 1, using a medical bone cement.

The medical bone cement is a conventional prosthetic filling hardener for use in a procedure for correcting a damaged portion (fracture site) of the spinal system or for a procedure for reinforcing a portion where bone strength becomes weak due to osteoporosis.

The medical bone cement is a liquid mixture in which various additives are mixed in a predetermined ratio in a polymethyl methacrylate (PMMA) or calcium phosphate polymer powder substrate, and have a viscosity similar to that of a conventional water glue and harden after curing. It is suitable as the prosthetic filler (2).

On the other hand, the reinforcing wire structure 4 is made of a polygonal or cylindrical enclosure having a size that can be wound or woven wire in a conventional manner and inserted into the fracture site (G). (See Fig. 1)

That is, the reinforcing wire structure 4 is wound or woven the wire (W) as shown in Figure 3 to form an outer surface by the wires (W), the interior of the filling space 6 of a certain size It is formed in the form of a cylindrical wire structure provided. According to this structure, the filling space 6 is provided in a state surrounded by the outer surface of the reinforcing wire structure 4 formed by the winding or weaving of the wire (W).

In addition, binding gaps H are formed on an outer surface of the reinforcing wire structure 4, and the binding gaps H are formed between the wires W when the wires W are wound or woven. do. That is, the outer surface of the reinforcing wire structure 4 is in the form of a conventional metal mesh (see FIGS. 2B and 3).

The binding gaps H may be formed to have a circumference of a polygon or a circle according to a method of winding or weaving the wire W.

The wire W may be a metal material that does not cause human side effects, for example, a wire member used to manufacture a conventional medical stent.

As described above, a method of making the reinforcing wire structure 4 so as to have a binding gap H of a polygonal or circular shape on the outer surface by winding or weaving the wire W is easy for those skilled in the art. Since it can be implemented, further detailed description is omitted.

As shown in FIG. 3, the reinforcing wire structure 4 is not limited to a structure in which the wire W is wound or woven in an unfolded state.

For example, as shown in FIG. 4, the wire structure 4 may be formed while winding or weaving the wires W connected in a bent state.

Since the structure of the prosthetic filler 2 and the wire W is increased in contact with the structure, the durability may be further increased when the prosthetic filler 2 is cured while being injected into the filling space 6. Can be.

The reinforcing wire structure 4 may be formed so that some of the outer surfaces of the reinforcing wire structure 4 may be prevented from passing through the prosthetic filler 2, and the remaining surface may be prevented from passing through the prosthetic filler 2.

That is, when the reinforcing wire structure (4) is located inside the fracture site (G) as shown in Figure 1, the side portion of the entire outer surface is formed to suppress the passage of the prosthetic filler (2) do.

This structure prevents the prosthetic filler 2 from flowing from the inside of the fracture site G to the outside while being discharged through the side of the reinforcing wire structure 4 while being injected into the filling space 6. You can prevent it.

In addition, the upper and lower surfaces are formed to allow the prosthetic filler 2 to pass through the entire outer surface of the reinforcing wire structure 4 based on FIG. 1.

Thus, the prosthetic filler 2 can be hardened in a state where it sticks to the upper and lower surfaces of the fracture site G while penetrating into the upper and lower surfaces of the reinforcing wire structure 4.

These actions can be achieved, for example, by forming the binding gaps H in a substantially blocked or open state when the reinforcing wire structure 4 is made while winding or weaving the wire W. It can be realized.

For example, when the binding gaps H formed on the side of the reinforcing wire structure 4 are formed in a closed state, the prosthetic filler 2 having a viscosity such as water pool is difficult to pass.

As shown in Fig. 3, the reinforcing wire structure 4 is formed to have a generally wedge-shaped end portion that gradually narrows while both opposing end portions move outward when formed in a cylindrical shape.

This structure is because the inside of the fracture site (G) of the vertebral bone is not crushed or diminished is formed mostly in the middle and wide at both ends, the cylindrical reinforcing wire structure (4) inside the fracture site (G) It can be positioned smoothly without departing from the space (see Fig. 1).

Although the reinforcing wire structure 4 is not shown in the drawings in addition to the cylindrical shape, the reinforcing wire structure 4 may be formed of various types of enclosures corresponding to the fracture site G.

In the above, the wire W is wound or woven to form the reinforcing wire structure 4 as an example in the description and drawings, but is not limited thereto.

For example, although not shown in the drawing, it may be formed into a housing corresponding to the fracture site G by processing by normal laser cutting so as to have a binding gap on the outer surface of a polygonal cylinder or a cylinder made of a thin metal plate.

In addition, the reinforcing wire structure 4 and the prosthetic filler 2 may be inserted and injected into the bent portion G using a conventional medical catheter T as shown in FIG. 5.

That is, the reinforcing wire structure 4 is inserted into the retracted state inside the insertion tube T1 of the medical catheter T, and the bent portion (4) through the discharge side end of the insertion tube T1. Can be inserted into G).

As shown in FIG. 6, the prosthetic filler 2 may be supplied to the filling space 6 of the reinforcing wire structure 4 through an inner passage of the insertion tube T1.

The prosthetic filler 2 is supplied through the passage of the insertion tube T1 to the filling space 6 through the binding gaps H formed on the outer surface of the reinforcing wire structure 4. This is filled.

As described above, the catheter T structure, which enables insertion and injection of the reinforcing wire structure 4 and the prosthetic filler 2, can be easily performed by those skilled in the art. Description is omitted.

Then, the reinforcing wire structure 4 is inserted after the crushed or sunk portion of the fracture site (G) to open the original state.

As such, the operation of opening the fracture site G may be performed by expanding the balloon pressure of the balloon catheter.

Therefore, in the medical implant according to the embodiment of the present invention, the reinforcing wire structure 4 is inserted into the fracture site G as shown in FIG. 1 during the spinal restoration procedure, and the reinforcing wire structure 4 It is performed in a state in which the implant filling material (2) is injected in a predetermined amount into the filling space (6).

Thus, while the prosthetic filler 2 is hardened in a state filled in the reinforcing wire structure 4, the fracture portion G may be supported to be maintained in its original state.

In particular, the prosthetic filler 2 is injected into the filling space 6 inside the reinforcing wire structure 4 so that the prosthetic filler 2 flows out of the fracture site G during spinal restoration. Can be prevented.

Further, when the reinforcing wire structure 4 is cured in a state in which the prosthetic filler 2 is contained in the filling space 6, as shown in FIG. 2B, each wire W is a kind of rebar. It will function.

Therefore, the prosthetic filler 2 has further improved resistance to various impacts, pressures, and loads after the restoration of the fracture site G.

The reinforcing wire structure 4 may be composed of two wire structures 4a and 4b, as shown in FIG.

That is, the outer surface of any one of the two wire structures 4a and 4b is wrapped in another wire structure 4b and formed in the form of a double structure having two outer surfaces.

Such a structure can further prevent the falling phenomenon of the prosthetic filler 2 by the two wire structures 4a and 4b, and further improve strength and resistance.

The reinforcing wire structure 4 may be formed to have three or more outer surfaces by, for example, three wire structures or more wire structures, although not shown in the drawings in addition to the double structure described above.

Medical implants according to an embodiment of the present invention, as shown in Figure 8 may be made further comprising a cover member (8).

The cover member 8 is used in a state of being attached to surround the outer surface of the reinforcing wire structure 4 (see FIG. 9).

The cover member 8 may use a conventional woven paper, more preferably a woven paper of polyester material having a brushed layer.

In particular, the polyester textile paper can prevent the prosthetic filler 2 from penetrating into the outside in a state in which the prosthetic filler 2 penetrates but does not apply a large pressure.

In addition to the polyester fabric paper, the cover member 8 may use, for example, a thin sheet (tape) made of one of polyurethane, silicone, collagen, and polytetrafluoroethylene (PTFE) materials.

In addition, the cover member 8 may be attached to surround a portion (side) for blocking the prosthetic filler 2 from the entire outer surface of the reinforcing wire structure 4.

That is, the cover member 8 is attached to surround the outer surface of the reinforcing wire structure 4 so that the prosthetic filler 2 flows down through the outer surface of the reinforcing wire structure 4. The discharge to the outside can be blocked once more.

As described above, the present invention can support the surgical site (fracture site) in a stable prosthetic state by using the prosthetic filler and the reinforcing wire structure.

In particular, since the prosthetic filler is cured in the state injected into the reinforcing wire structure, various medical side effects that may occur while the prosthetic filler flows out of the treatment site (for example, pressure of the nerve and the spinal cord) Symptoms, myocardial infarction, cardiac arrest, cerebrovascular disorders can be prevented as much as possible.

In addition, since the reinforcing wire structure serves as a kind of reinforcing bar when the prosthetic filler is cured, the strength after curing of the prosthetic filler is improved, as well as against various impacts, pressures, and loads. More resistance can be secured.

Therefore, the medical prosthesis according to the embodiment of the present invention can obtain satisfactory surgical stability and prosthetic support when performing the restoration of the body spine.

Claims (8)

Implants that are filled in the fractured areas of the vertebral bone so that the fracture site remains in its original form, Prosthetic filling material for prosthesis of fracture site; A reinforcing wire structure having an outer surface where binding gaps are formed between the wires by winding or weaving wires, and a filling space for filling the prosthetic filler by the outer surface is formed therein; Medical implants comprising a. The method according to claim 1, The prosthetic filler, Medical implants, characterized in that the medical bone cement (bone cement). The method according to claim 1, The reinforcing wire structure, Medical implants, characterized in that formed into a housing having an outer surface of a polygonal or cylindrical shape. The method according to claim 1, The binding gaps, Medical implant formed to have a circumference of a circle or polygon. The method according to claim 1, The reinforcing wire structure, Medical prosthesis, characterized in that the opposite ends are formed in a polygonal or cylindrical shape gradually formed narrower while proceeding to the outside. The method according to claim 1, The medical implant further includes a cover member, The cover member, Medical implants are attached to surround the entire or part of the outer surface of the reinforcing wire structure. The method according to claim 6, The cover member, Medical prosthesis using polyester fabric paper or thin sheet (tape) made of any one of polyurethane, silicone, collagen, and polytetrafluoroethylene (PTFE). The method according to claim 1, The reinforcing wire structure, Consists of one wire structure, Medical implants are formed to have at least one outer surface by combining a plurality of wire structure in a state surrounding the outer surface.

Images