JP2600599Y2 - Osteosynthesis - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an osteosynthesis device for fixing a fractured portion, which is used by being attached to a bone surface with a screw or the like so as to cross the fractured portion, and is particularly suitable for joining a skull. To a small osteosynthesis plate.

[0002]

2. Description of the Related Art Conventionally, as a osteosynthesis device for fixing a fractured portion in an aligned state, a bone plate or a ladder-shaped body provided with a plurality of fixing holes for inserting buried screws is used. . These are generally formed from an inert material such as Ti and are embedded in the body for a long time or permanently. To attach the osteosynthesis, first, the osteosynthesis is positioned on the bone surface so as to straddle the fracture line with the fracture portion aligned, and the positions of the screw holes for screw embedding are determined. Next, a screw hole is formed at a predetermined position. Finally, the osteosynthesis is positioned on the bone surface again, and the embedded screw is inserted through the fixing hole and screwed into the screw hole, thereby fixing the osteosynthesis to the bone.

[0003]

However, in the above-mentioned conventional osteosynthesis device, it is difficult to position the osteosynthesis itself while maintaining the fractured portion in an aligned state by itself, and also determine the position of the screw hole. Work was required, and the workability was very poor. In particular, when the skull is repaired, there is a problem that a quick and appropriate operation cannot be performed because the skull is a site where it is difficult to support the bone.

In view of the above problems, the present invention improves the workability during actual osteosynthesis, in particular, the handleability in positioning and fixing the skull of the head, so that a quick and appropriate operation can be performed. It is intended to provide an osteosynthesis.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the osteosynthesis of the present invention is formed at least two apart from each other on a body fixed on a bone surface across a fracture. With fixed holes for fixing bearings, on both sides of the fracture
An osteosynthesis device attached to a surface portion on the opposite side of a bone to perform joint fixation, wherein the body has a relatively smooth surface and a bottom surface to face the bone surface, wherein the body has A bent portion bent in a direction having an angle with respect to the bottom surface at a portion other than the end portion, and extending substantially parallel to each other at both side portions of the bent portion , each including the bottom surface. A pair of supports
Holding portion is formed on the pair of support portions.
The bottom surface is formed on the front and back opposite sides, the pair of supporting
A driving portion projecting from at least one of the bottom surfaces of the holding portion
It is characterized by having a material .

In the present invention, the driving member has a shaft
The support portion is configured to be rotatable about the line with respect to the support portion.
That it is preferable.

[0007]

According to such means, the separated portion of the skull is fixed to one side of the bent portion and the other side of the bent portion is fixed to the separated portion of the skull because the main body has a shape provided with the bent portion. Can be mounted on the surrounding bone, so that there is no danger that the resected part will come off from the bone connector when positioning the resected skull or the like, and the operation can be performed with confidence.

[0008] Here, by driving the driving member into the bone to be bonded, the osteosynthesis is temporarily fixed to the bone, so that the positioning operation is facilitated, and the re-drive can be easily performed. Further, even when the osteosynthesis device is once removed when drilling the burial screw hole or the like, the bone fastener can be attached again at the same position with the mark of the implantation. Further, even during mounting with an embedded screw or the like, the operability is improved because the bone connector is positioned and fixed by the haken.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 shows a connector 21 made of a material such as pure titanium or a titanium alloy according to an embodiment of the present invention. In this embodiment, the main body 22 has a bending portion 24 at its center.
And the support portions 23,
Reference numeral 25 denotes bottom surfaces 23b and 25 formed opposite to each other.
with b.

In response to the formation of the bottom surface, screw holes 2
Each of 3a and 25a has a tapered surface inclined in a direction opposite to the top and bottom directions, and further has Hakens 26 and 27 (Hakens 26 and 2).
7 may not be provided. ) Is mounted so as to protrude upside down.

The support portions 23 and 25 are basically formed so as to extend in parallel with each other, but may be formed as a whole or slightly displaced from the parallel shape depending on the shape of the bone at the joint. is there.

The bases of the harkens 26 and 27 are inserted into holes in the main body and fixed by welding. The haken may be basically provided only at one end, and may be of any shape as long as it has the required strength and can be driven into bone.

In the joint surgery using the above embodiment, for example, one haken is driven into the surface of one bone to be joined so as not to come off, and then the alignment with the other bone is adjusted to adjust the position of the joint. Check. Here, if there is no problem in the position, the haken is completely driven and fixed, and after matching with the other bone, in some cases, another haken is also driven. Then, a screw hole is drilled from the bone surface as it is, and fixed with an embedded screw as before.

Here, if there is a problem in the mounting position of the connector, it can be easily removed and driven again to another position. In addition, it is also possible to drill a screw hole after removing the joining tool once, in this case, after forming the screw hole, if you drive the Haken again into the previous driving mark,
Can be accurately mounted in the same position. And even at the time of the permanent fixing with the buried screw, the work can be easily performed since the joining tool is attached by the haken.

In this embodiment, the harken is provided at both ends of the main body 22, but the above-described improvement in workability can be obtained even when the haken is provided only at one end. However, in this case, the fractured portion cannot be held in alignment by hammering. The length, diameter, cross-sectional shape, etc. of the harken are not particularly limited as long as they can be cast into the bone, and should be appropriately selected depending on the thickness and shape of the bone of the repaired portion.

FIG. 2 is an explanatory view showing the case where the skull is joined using this embodiment. For example, after a part B of the skull A is resected and an operation is performed, the resection part B is joined as follows. First, with the cut portion B removed, a haken 26 of the joint 21 (a plurality of joints may be used as shown in FIG. 2) is driven into the back surface and temporarily fixed.

Then, the resected portion B is aligned with the skull together with the temporarily fixed connector 21, and the supporting portion 2 is fixed as shown in FIG.
5 is brought into contact with the surface of skull A. In this state, while adjusting the position of the cutout B, it is examined whether the position of the connector 21 is appropriate. If there is no problem here, the resection portion B is taken out again, fixed with screws using the screw holes 23a, aligned with the skull again, and fixed to the skull A with the screw holes 25a. Further, when the position of the joint 21 is not good or when the temporary joint 21 is removed for drilling a screw hole, the same operation as in the first embodiment may be performed.

In this embodiment, the cutout portion B is supported by the surrounding skull A by the support portion 25 based on the refraction shape of the main body 22, so that the state shown in FIG. Workability is improved. This embodiment is a connector particularly suitable for permanent fixation of the skull, and can greatly reduce the physical and psychological burden on the operator.

In addition, there is an advantage that there is no danger that the haken will come off during the positioning operation and the resection portion B will fall into the skull when the temporary fixing with the haken is performed. further,
Since the harken 26 is driven from the direction in which the resection portion B falls, there is also an effect that the operation can be performed with psychological security.

FIG. 3 shows another example of the haken used in the above embodiment. The haken 30 has a base 30a.
Are inserted into the mounting holes provided in the main body of the connector from the bottom side, the fixing members 32 are fitted from the front side, and are fixed to each other by welding or the like. At this time,
The harken 30 is rotatable around the axis with respect to the body of the connector. Therefore, since the joint can be rotated with respect to the bone around the haken that has been driven in when the joint is temporarily fixed, the positioning of the joint and the positioning of the screw hole become extremely easy, and The removal of the haken by rotating the tool is prevented.

The haken 30 has a plurality of surface grooves 31 between the base portion 30a and the distal end portion 30b. These surface grooves 31 are buried in the bone in a driven state. The connector is strongly fixed by the bone being cut into the groove.

[0023]

[Effects of the Invention] As described above, according to the present invention,
Due to the shape having the bent portion, in positioning work for joining the resected skull and the like, there is no danger that the resected portion will come off the bone connector, and the operation can be performed with confidence.

[Brief description of the drawings]

FIG. 1 is a side view showing a structure of an embodiment of a bone connector according to the present invention.

FIG. 2 is a sectional view showing a state where the embodiment is used for joining a skull.

FIG. 3 is a side view showing another example of the harken in the embodiment.

[Explanation of symbols]

 22 Body 23a, 25a Screw hole 26, 27, 30 Haken 23, 25 Supporting part 24 Refracting part 31 Surface groove 32 Fixing member

────────────────────────────────────────────────── ─── Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A61B 17/56-17/60

Claims (2)

(57) [Scope of request for utility model registration] 1. A front and back side of a bone on both sides of a fracture, wherein the body is fixed on the bone surface across the fracture with at least two spaced-apart fixing holes for fixing bearings.
An osteosynthesis attached to an opposing surface portion for effecting joint fixation, wherein the body has a relatively smooth surface and a bottom surface to face the bone surface, the body having an end. A bent portion bent in a direction having an angle to the bottom surface in a portion other than the portion, and extends substantially parallel to each other on both side portions of the bent portion ,
A pair of support portions having the bottom surface are formed, and the bottom surfaces formed on the pair of support portions are formed on opposite sides of each other, and are provided in front of at least one of the pair of support portions.
An osteosynthesis, comprising a driving member projecting from the bottom surface . 2. The driving member according to claim 1, wherein
Is configured to be rotatable about the axis with respect to the support portion.
Osteosynthesis device, characterized by that.