WO2006013624A1

WO2006013624A1 - External fixation device

Info

Publication number: WO2006013624A1
Application number: PCT/JP2004/011093
Authority: WO
Inventors: Koichi Yoshino
Original assignee: Yoshino Industry, Co., Ltd.
Priority date: 2004-08-03
Filing date: 2004-08-03
Publication date: 2006-02-09
Also published as: WO2006013670A1

Abstract

A hybrid type external fixation device that can realize early social rehabilitation, preventing any regressive arthropathy type changes and that can facilitate craft of surgery. There is provided an external fixation device comprising a proximal pin capable of piercing the radius; a distal pin capable of piercing the ossa digitorum (metacarpal bone); a fracture portion pin capable of piercing any bone piece resulting from fracture of the wrist joint; a proximal pin clamp capable of holding and immobilizing the proximal pin; a distal pin clamp capable of holding and immobilizing the distal pin; a plate member capable of disposing and immobilizing a multiplicity of fracture portion pins; and a rod-like member capable of interlocking and immobilizing the proximal pin clamp, the distal pin clamp and the plate member, wherein in the course of therapy, the distal pin can be removed.

Description

Specification

External fixator

Technical field

TECHNICAL FIELD [0001] The present invention relates to an external fixator used for fixing a fractured part, and more particularly to an external fixator suitable for a wrist joint fracture.

Background art

[0002] Fractures in the wrist joints can be treated with manual reduction and cast fixation before! / In the case of unstable fractures and intra-articular fractures, even if they have been reduced, casts etc. Then, there are many cases in which rearrangement is performed again and the daily operation is immediately disturbed.

Therefore, surgical treatment is desired for severe fractures, but the typical treatment is external fixator. In recent years, it has become clear that adequate functional recovery can be obtained by using an external fixator appropriately for severe fractures. Currently, external fixators used for wrist joint fractures include the Bridge Type, which reduces and fixes bone fragments by pulling across the wrist joint, as shown in Fig. 12, and external fixation. There are two types, Non Bridge Type, which fix bone fragments with small diameter pins without the cervix straddling the wrist joint.

[0003] Further, Patent Document 1 discloses a non-bridge type external fixator that allows pin insertion from a plurality of directions.

Patent Document 1: Japanese Patent Laid-Open No. 2003-305049

Patent Document 2: JP 2002-172119 A

Special literary reference 1: http://www.keiseimed.com/ seihin_flame.htm

Disclosure of the invention

Problems to be solved by the invention

[0004] Conventional external and external bridge type non-bridge type external fixators have the following advantages and disadvantages.

In other words, the advantage of the Bridge Type is that it does not apply pressure to the joint surface damaged by traction in consideration of damage to the joint surface of the wrist joint caused by fracture. And the cartilage on the joint surface By protecting, future degenerative arthritic changes can be prevented. The disadvantage is that it requires a long towing period (about 6 to 18 weeks), and to restrict the movement of the wrist joint, the joint contracture of the wrist joint due to insect muscle ischemia etc. There was a problem of declining motor function and bone atrophy.

The advantage of the Non Bridge Type is that the bone fragment can be fixed with a pin and the joint surface of the wrist joint can be reduced, and the range of motion of the joint can be moved earlier. The disadvantage is that the surgical assistant pulls the wrist joint by hand and fixes the bone fragment using a pin in the reduced position, so it cannot be pulled continuously. Therefore, there is a problem that pressure is applied to the damaged joint surface and the cartilage on the joint surface cannot be protected, so that there is no problem in the short term, but degenerative arthritic changes may occur in the long term.

[0005] Therefore, the present invention has been made in view of the problems of the above-described conventional two types of external fixators, and enables early rehabilitation while preventing degenerative arthritic changes. In addition, it aims to provide a hybrid type external fixator with a simple surgical technique.

Means for solving the problem

[0006] In order to solve the above problem, the external fixator according to claim 1 includes a proximal pin that can be inserted into a rib,

A distal pin that can be inserted into the phalange (metacarpal bone);

A fracture pin that can be inserted into a bone fragment caused by a fracture of a wrist joint,

Means for connecting and securing the proximal pin, the distal pin, and the fracture pin;

Means for arranging and fixing a large number of the fracture pin,

The gist is that the distal pin is configured to be removable in the course of treatment.

[0007] Further, the external fixator according to claim 2, wherein the proximal pin that can be inserted into the radius,

A distal pin that can be inserted into the phalange (metacarpal bone);

A fracture pin that can be inserted into a bone fragment caused by a fracture of a wrist joint;

A proximal pin clamp capable of pinching and fixing the proximal pin;

A distal pin clamp capable of pinching and fixing the distal pin;

A plate-like member capable of arranging and fixing a number of the fracture portion pins;

The proximal pin clamp, the distal pin clamp, and a rod for connecting and fixing the plate-like member And having a member

[0008] Further, the external fixator according to claim 3, wherein the proximal pin that can be inserted into the rib,

A distal pin that can be inserted into the phalange (metacarpal bone);

A distal pin clamp capable of pinching and fixing the distal pin;

The plate-like member has a protruding portion that is extended and can fix and fix the proximal pin, the distal pin clamp, and a rod-like member that connects and fixes the plate-like member. It is essential that the distal pin and the rod-like member are configured to be removable.

[0009] Further, the external fixator according to claim 4 has the structure according to claim 2, and the plate-like member has a large number of screw holes or scissors for inserting the fracture pin. The gist is that a number of the fracture pin can be arranged and fixed by providing a groove.

[0010] Further, the external fixator according to claim 5 has the structure according to claim 3, and the plate-like member has a large number of screw holes or scissors for inserting the fracture pin. By providing a groove, it is possible to arrange and fix a large number of the fracture pin,

The gist of the invention is that the protruding portion is provided with a screw hole or an insertion groove for inserting the proximal pin so that the proximal pin can be disposed and fixed.

[0011] Further, the external fixator according to claim 6 is the external fixator according to claim 4, wherein a number of screw holes for inserting the fracture pin are provided in the plate-like member. Forms a taper on the side of the pin head of the fracture pin,

A taper part having the same shape as the taper part is formed in the screw hole of the plate-like member, and the pin head of the fracture part pin is screwed into the screw hole of the plate-like member, so that the pin head of the fracture part pin is plate-like The gist is that it does not protrude from the upper surface of the member.

[0012] Further, the external fixator according to claim 7 is provided with a number of screw holes for inserting the fracture pin into the plate-like member, in addition to the external fixator according to claim 5. Installed and popping part When providing a screw hole for inserting a proximal pin,

A tapered part is formed on the pin head side surface of the fracture pin and the proximal pin,

A taper part having the same shape as the taper part is formed in the screw hole of the plate-like member and the protruding part,

By pinching the pin head of the fracture pin and the proximal pin to the plate-like member and the screw hole of the protruding part, respectively,

The gist is that the pin heads of the fracture pin and the proximal pin do not protrude from the upper surfaces of the plate-like member and the protruding portion, respectively.

The invention's effect

[0013] According to the present invention, since the proximal pin that can be inserted into the radius and the distal pin that can be inserted into the phalange (metacarpal bone) are provided, it is possible to apply pressure to the joint surface damaged by traction. Protecting the articular cartilage can prevent future degenerative arthritic changes. And since it has the fracture | rupture part pin which can be inserted in the bone fragment produced by the fracture of a wrist joint, long-term traction becomes unnecessary. Therefore, by removing the distal pin during the course of treatment, it is possible to move within the range of motion at an early stage, preventing joint contracture of the wrist joint due to worm-like muscle ischemia, lowering of the movement function of the fingers, and bone atrophy. be able to.

[0014] Further, according to the present invention, since a number of fracture portion pins are arranged and fixed, the fracture portion pins can be inserted from a plurality of directions into a bone fragment caused by a fracture of the wrist joint portion. Therefore, it can be effectively used even when it is desired to use a large number of fracture pin pins for grinding fracture or the like.

Furthermore, according to the present invention, the bone fragment can be reduced by towing, and the fracture pin can be easily driven in the bone reduction position.

Brief Description of Drawings

FIG. 1 is a perspective view of an external fixator according to a first embodiment.

FIG. 2 (a) is a front view of a clamp and a support. (B) It is a rear view of a clamp and a support body. (C) It is a side view of a clamp and a support body. (D) It is a top view of a clamp and a support body.

FIG. 3 is a side view of an arched plate and a support. FIG. 4 (a) is a cross-sectional view of a fracture pin and an arched plate. (B) It is a figure which shows the attachment condition of a fracture part pin.

FIG. 5 is a view showing a usage state of the external fixator according to the first embodiment.

FIG. 6 is a perspective view of an external fixator according to a second embodiment.

FIG. 7 is a view showing a usage situation of the external fixator according to the second embodiment.

FIG. 8 is a perspective view of an external fixator according to a third embodiment.

FIG. 9 is a top view of an arched plate.

FIG. 10 is a diagram showing a state of insertion of a fracture pin.

FIG. 11 is a view showing a modification of the external fixator according to the first embodiment.

FIG. 12 is a diagram showing a prior art.

Explanation of symbols

1 External fixator

2 Proximal pin

3 Distal pin

4 Fracture pin

5, 5 'arched plate

6 Proximal pin clamp

7 Distal pin clamp

8, 9, 10 support

11 Rod member

12 Screw hole

20, 21 Holding plate

20, sandwich plate

20 "clamping plate

22, 23 Fastening screw

22 'Fastening screw

24, 24, 24, Fastening part 27, 27 'Fastening screw

27, 'Fastening screw

27a Screw hole

28 Fastening screw

30 pin head

31, 32 Taper 咅 1

33 Pin tip

40 ribs

41 phalanges (metacarpal bones)

42 Ulna

50 Jumping out part

51 Screw hole

60, 61

62, 64 Tightening screw

63, 65 nut

66, 66 'screw hole

67, 67 'screw hole

BEST MODE FOR CARRYING OUT THE INVENTION

The external fixator according to the present invention has a proximal pin and a distal pin, and is mounted across a fractured portion of the wrist joint (distal radius end). They are inserted into the ribs and phalanges (metacarpal bones). Two to three proximal and distal pins are provided.

The proximal pin and the distal pin are each held and fixed by a member such as a clamp, and further connected by a rod-like member. This makes it possible to reduce and fix the bone fragment of the fractured part by towing.

As will be described later, at least the distal pin is configured to be removable during the treatment process. Furthermore, in the present invention, a “fracture pin” is disposed at a position intermediate between the proximal pin and the distal pin, that is, at the position of the fracture portion of the wrist joint, and inserted into the bone fragment generated by the fracture. . Considering cases such as fractures of ribs and ulna fractures, many pins can be inserted, and preferably about 2 to 10 pins can be placed. For this purpose, in the present invention, a plate-like member having a certain area is used, and means for inserting and fixing a large number of fracture pin pins such as screw holes and attachment grooves is provided on the member. Further, if the plate-like member is formed as an arch-type plate that conforms to the shape of the wrist, it is preferable that a number of fracture pin can be inserted from a plurality of directions at different angles.

The plate-like member that holds and fixes the fracture pin is connected and fixed to the rod-like member, which eliminates the need for long-term traction, and about 2 to 3 weeks have passed since the fracture bone can be formed in the treatment process. Later, the distal pin inserted into the phalange (metacarpal bone) can be removed.

[0019] Further, all or part of the plate-like member may be extended to the palm side, and a means for disposing and fixing the proximal pin to the extended portion may be provided. By rubbing in this way, it becomes possible to perform traction without connecting the proximal pin to the rod-shaped member via a member such as a clamp, and it is possible to remove the rod-shaped member together with the distal pin after the traction period has elapsed. Become.

[0020] For the proximal pin, the distal pin, and the fracture pin, a durable material that has little influence on the human body such as titanium alloy and stainless steel is used. The size (diameter) of each pin is preferably 3 to 4 mm for the proximal pin, 2 to 3 mm for the distal pin, and 1 to 4 mm for the fracture pin, taking into account the strength and location used. The tip of the pin should be shaped like a screw to improve the fixation to the bone.

In addition, plate-like members are preferably formed using X-ray transparent materials such as carbon fiber and plastic.

The rod-shaped member, clamp, and other members may be of any material and shape as long as they can exhibit the function of the external fixator according to the present invention.

Example 1

[0021] A first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the external fixator (1) according to the present embodiment has two proximal pins (2) and a distal end at both ends of the rod-like member (11). Two pins (3) are arranged via clamps (6) (7) and supports (8) (9), respectively, and a desired number of fracture pins (4 ) Is disposed via the arched plate (5) and the support (10).

[0022] As shown in Figs. 2 (a)-(d), the support (8) (9) is formed by a pair of clamping plates (21), and by fastening the fastening screw (23), It is fixed to the rod-shaped member (11). Similarly, the clamps (6) and (7) are also formed by a pair of clamping plates (20), and the fastening screws (22) are screwed to hold the pins (2) and (3) while holding the pins (2) and (3). ) Fixed to (9). Grooves having a semicircular cross section are formed on the opposing surfaces of the clamping plates (20) and (21) so that the pin (2) (3) and the rod-shaped member (11) can be stably clamped. ing.

The supports (8) and (9) can be fixed at an arbitrary rotation angle with respect to the axial direction of the rod-shaped member (11), and the clamps (6) and (7) are fixed to the axial direction of the rod-shaped member (11). It can be fixed at an arbitrary rotation angle with respect to the vertical direction (axial direction of the fastening screw (22)). For this reason, the proximal pin (2) or the distal pin (3) can be inserted at various angles.

As shown in FIG. 1, the arched plate (5) is a plate-like member having an arc shape with a central angle (0) within 180 ° and having a certain width and thickness. The reason why the central angle (0) is set within 180 ° is that an angle larger than 180 ° is not necessary as a sufficient angle for inserting the pin from the back side in the wrist joint.

As shown in FIG. 1, both ends of the arched plate (5) are bent to form fastening portions (24) and (24 ′), and as shown in FIG. 3, through the backing plate (25). The arched plate (5) is fixed to the support (10) by screwing the fastening screw (27). The support (10) is formed by a pair of clamping plates (26). The fastening part (24) can be fixed at any rotation angle with respect to the direction perpendicular to the axial direction of the rod-like member (11) (axial direction of the fastening screw (27)). The fracture pin (4) can be inserted. The arched plate (5) may be screwed directly to the sandwiching plate (26) without going through the receiving plate (25).

The clamping plate (20) constituting the clamp (6) (7) and the receiving plate (25) of the arched plate (5), or the clamping plate (21) constituting the support body (8) (9) are supported. It is preferable to use a common member for the clamping plate (26) constituting the body (10) because the number of members can be reduced. As shown in FIG. 1, the arched plate (5) is provided with a plurality of screw holes (12) for fastening and fixing the fracture pin (4). In this embodiment, four rows of screw holes (12) are formed at equal intervals in a concentric manner.

As shown in FIG. 4 (a), a tapered portion (31) is formed on the side surface of the pin head (30) of the fracture pin (4), and a male screw is engraved on the tapered portion (31). . The screw hole (12) that is drilled in the arched plate (5) is also formed with a tapered portion (32) having the same shape as the tapered portion (31) on the side surface of the pin head (30), so that the female screw is When the fracture pin (4) is inserted and screwed, the pin head (30) is flush with the top surface of the arched plate (5) as shown in Fig. 4 (b). To form a flat surface.

As shown in FIG. 1, the pin head (30) is provided with a wrench groove (30a) so that it can be attached to and detached from the screw hole (12) using a dedicated wrench or the like.

Next, a usage example of the external fixator according to the present embodiment will be described. As shown in Fig. 5, an arched plate (5) is placed at the position of the wrist joint, and the fracture pin (4) is inserted into the rib (40) fragment caused by the fracture, and the arched plate is inserted. Fix it to the plate (5). The necessary number of fracture pins (4) can be inserted into a desired position of the screw hole (12) of the arched plate (5) according to the fracture condition.

The rib (40) (proximal) and phalange (metacarpal) (41) (distal) are held by the clamp (6) (7) via the support (8) (9), respectively. Insert the proximal pin (2) and the distal pin (3), and reduce and fix them while pulling the hand joint. Approximately 2-3 weeks after the external fixator (1) was attached, callus formation at the fracture started and the bone fragment began to stabilize. The position pin (3), the clamp (7) holding it, and the support (9) can be removed.

The arrangement positions of the clamps (6), (7), the arched plate (5) and the like can be appropriately adjusted according to the patient's case.

The proximal pin (2) and the distal pin (3) in this embodiment may be arranged and fixed by the arched plate (5 '), like the distal pin in the second embodiment. ! ヽ (see Figure 6).

[0026] As described above, according to this embodiment, each of the clamp (6) (7) and the arched plate (5) 1S The support (8), (9) and (10) can be fixed at a desired rotation angle, and the support (8), (9) and (10) can be fixed with respect to the rod-shaped member (11). The proximal pin (2), distal pin (3), and fracture pin (4) can be inserted at various angles and can be reduced from various directions. . In particular, since the arched plate (5) is provided with a large number of screw holes (12), it is possible to dispose the necessary number of fracture pins at the necessary positions. In addition, since the pin head (30) of the fracture pin (4) is screwed in without protruding from the upper surface of the arched plate (5), the safety of daily operations of the patient is improved.

[0027] As shown in Fig. 11 as a modified example of the present embodiment, two to four fastening screws (22 ') are screwed together so that a pair of clamping plates (20') (20 '') Fracture pin (4) 2—Also hold and fix 3 pins. The holding plate (20 ′) is formed in an L shape, and is fixed to the support (10) by screwing a fastening screw (27 ′ ′).

Even when the external fixator (1) is configured in this way, the fracture piece can be reduced and fixed by traction with the proximal pin (2) and the distal pin (3), and the fracture portion can be fixed. Since the pin (4) is inserted into the bone fragment of the fracture and fixed, long-term traction is not required, and the distal pin (3) inserted into the phalange (metacarpal bone), clamp (7) The support (9) can be removed during the treatment process!

Example 2

[0028] A second embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 6, the external fixator (1) according to the present embodiment has two distal pins (3) attached to one end of a rod-shaped member (11), an arched plate (5 ′), and a support ( 9), the proximal end of the rod-shaped member (11), 3 proximal pins (2), and a desired number of fracture pin (4), arched plate (5), support (10) is provided.

[0029] As shown in FIG. 6, the external fixator (1) according to the present embodiment is configured such that a part of the arched plate (5) is partly parallel to the rod-like member (11) on the back side. The projecting portion (50) is formed by extending to. In the protruding part (50), three screw holes (51) are drilled in parallel with the rod-shaped member (11), and the pin head of the proximal pin (2) protrudes in the same manner as in FIG. It is configured to be screwable so as to be flush with the upper surface of the portion (50).

In this embodiment, the distal pin (3) is disposed and fixed using an arched plate (5 '). As with the fracture pin (4) and the proximal pin (2), the distal pin (3) is configured so that the pin head does not protrude.

The arched plate (5) (5 ') is formed by screwing the fastening part (24) (24 ") to the support (10) (9) by the fastening screw (27) (27'), respectively. The rod-like member (11) is fixed.

[0030] FIG. 7 is a diagram illustrating a usage example of the external fixator (1) according to the present embodiment. Also in this example, the proximal pin (2) and the distal pin (3) were inserted into the radius (40) and the phalange (metacarpal) (41), respectively, to the wrist joint. Reduce and fix while towing. After about 2 to 3 weeks, the distal pin (3) inserted into the phalange (metacarpal) (41), the arched plate (5 ') holding it, and the support (9) are removed. Since the proximal pin (2) is fixed integrally with the arched plate (5), the rod-shaped member (11), the support (10) of the arched plate (5), the receiver The plate (25) can also be removed.

In addition, the arched plate (5) according to the present embodiment is provided with fastening portions (24) and (24 ') at both ends, and a protruding portion (50) is formed at the center, which is symmetrical. Because it is configured, it can be used by wearing even if it is a left or right hand.

[0031] As described above, according to the present embodiment, the distal pin (3), the arched plate (5 '), the backing plate (25'), about 2-3 weeks after the external fixator (1) is mounted, The support (9), backing plate (25), and rod (11) can be removed, and the patient can do the remaining weeks for the arched plate (5) and the proximal pin (2) that is clamped to it. Since it is sufficient to wear only the fracture pin (4), the troublesomeness is reduced. And since the pin head of any of the proximal pin (2), the distal pin (3), and the fracture pin (4) does not protrude, the convenience and safety of daily operation of the patient are markedly improved. Will be up.

Further, according to the present embodiment, an external fixator that can be attached to either the left or right hand with the same member can be provided, which is very convenient.

Example 3

[0032] A third embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 8, the external fixator (1) according to the present embodiment has two distal pins (3) clamped at one end of a rod-like member (11) (7) and a support (9). And place the desired number of proximal pins (2) on the other end of the rod-shaped member (11). The fracture pin (4) is disposed through the arched plate (5) and the support (10).

[0033] The external fixator (1) according to the present embodiment replaces the screw hole (12) (51) of the arched plate (5) and the protruding portion (50) with the fastening groove (60) ( 61).

The grooving groove (60) through which the fracture pin (4) can be passed is a notch of the arched plate (5) with a width approximately equal to the diameter of the fracture pin (4), as shown in Fig. 8. These are arranged in a direction perpendicular to the rod-like member (11). Similarly, the fitting groove (61) through which the proximal pin (2) can pass is a bar-like member having a notch in the protruding portion (50) with a width corresponding to the diameter of the proximal pin (2). (11) are arranged in parallel.

[0034] As shown in FIG. 9, the fracture pin (4) inserted into the attachment groove (60) is provided with a screw provided on the side surface of the arched plate (5) and the inner surface of the attachment groove (60). It is fixed by a tightening force generated by screwing a tightening screw (62) and a nut (63) disposed through the holes (66) (66 '). That is, the arched plate (5) is elastically deformed by the tightening force, and the fracture pin (4) is clamped and fixed in the fastening groove (60).

Similarly, the proximal pin (2) is also fastened by being threaded through the screw holes (67) (67 ') provided in the side surface of the protruding portion (50) and the inner surface of the fitting groove (61). It is clamped and fixed in the fitting groove (61) by the tightening force generated by the screwing of the screw (64) and the nut (65).

Therefore, in the present embodiment, the arched plate (5) and the protruding portion (50) are elastic as described above by the tightening force of the tightening screws (62) (64) and nuts (63) (65). A material (eg, carbon fiber or plastic) that deforms and can be used to clamp and fix the fracture pin (4) and proximal pin (2) is used.

Further, since the fracture pin (4) and the proximal pin (2) are fixed as described above, the fracture pins (60) (61) in the perforation grooves (60) (61) that do not interfere with the tightening screws (62) (64) are provided. If it is a position, it can be placed at any position.

Furthermore, as shown in FIG. 10, the insertion angle can be varied for each pin.

[0035] As described above, according to the present embodiment, the fracture pin (4) and the proximal pin (2) are respectively connected to the fixation groove (60).

It becomes possible to arrange the required number at a desired position in (61).

In addition, since the insertion angle can be changed for each pin, it can be adjusted according to the patient's symptoms. Correspondence becomes possible.

Industrial applicability

The present invention solves the problems of the conventional external fixator of the Bridge Type and Non Bridge Type wrist joints, enables early reintegration, prevents degenerative arthritic changes, and is a surgical technique. Provides a simple external fixator and has industrial applicability.

Claims

The scope of the claims

[1] a proximal pin that can be inserted into the rib,

A distal pin that can be inserted into the phalange (metacarpal bone);

Means for arranging and fixing a large number of the fracture pin,

External fixation characterized in that the distal pin is configured to be removable in the course of treatment

[2] a proximal pin that can be inserted into the rib,

A distal pin that can be inserted into the phalange (metacarpal bone);

A proximal pin clamp capable of pinching and fixing the proximal pin;

A distal pin clamp capable of pinching and fixing the distal pin;

The proximal pin clamp, the distal pin clamp, and a rod-like member for connecting and fixing the plate-like member;

[3] a proximal pin that can be inserted into the rib,

A distal pin that can be inserted into the phalange (metacarpal bone);

A distal pin clamp capable of pinching and fixing the distal pin;

The plate-like member force has a protruding portion that is extended and can fix the proximal pin, the distal pin clamp, and a rod-like member that connects and fixes the plate-like member. An external fixator characterized in that the distal pin and the rod-like member are detachable.

[4] The plate-like member has a large number of screw holes or insertions for inserting the fracture pin. 3. The external fixator according to claim 2, wherein a number of said fracture pin is arranged and fixed by providing a groove.

[5] The plate-like member is provided with a large number of screw holes or insertion grooves for inserting the fracture portion pins so that a large number of the fracture portion pins can be arranged and fixed.

4. The protruding portion according to claim 3, further comprising: a screw hole or an insertion groove for inserting the proximal pin in the protruding portion so that the proximal pin can be disposed and fixed. External wound furniture.

[6] When the external fixator according to claim 4 is provided with a number of screw holes for inserting the fracture pin into the plate-like member,

A taper part is formed on the pin head side surface of the fracture pin,

A taper part having the same shape as the taper part is formed in the screw hole of the plate-like member, and the pin head of the fracture part pin is screwed into the screw hole of the plate-like member, so that the pin head of the fracture part pin is plate-like An external fixator characterized in that it does not protrude from the upper surface of the member.

[7] The external fixator according to claim 5 is provided with a number of screw holes for inserting the fracture pin in the plate-like member, and a proximal pin is inserted in the protruding portion. When providing a screw hole for wearing,

A taper portion having the same shape as the tapered portion is formed in the screw hole of the plate-like member and the protruding portion,

An external fixator characterized in that the pin heads of the fracture pin and the proximal pin do not protrude from the upper surface of the plate-like member and the protruding part, respectively.