JPH06245941A - Barrel plate for redressing and fixing fracture - Google Patents

Abstract

PURPOSE:To stably fix a fracture lesion by integrally providing the head part of a flat and slender handle with an upper barrel part extending with inclination and a lower barrel part extending in parallel therewith and providing these barrel parts with screw means in such a manner that these means can freely advance and retreat and be freely locked. CONSTITUTION:The fracture lesion is first redressed and thereafter, two pieces of guide pins 4, 5 are inserted along center lines A, B so as to pass the lesion in parallel with each other by using an angle guide 3 at the time of redressing a part of the neck 1 of the femur (the section shown by a fracture line 2) in case this part is fractured. After the insertion depth of the guide pins 4, 5 is measured, the respective points A, b are exactly reamed by reamers to form a circular hole in the bone head. The respective holes are then tapped and a lug screw 6 and cannulated screw 9 of suitable length are respectively inserted into these holes. A valve plate 7 are mounted to the base parts of these screws and is fixed by fastening. This plate 7 is fixed by means of a cortical screw 10 to the cortical bone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrel plate for reducing and fixing a fracture, and more particularly to a barrel plate for reducing and fixing a fracture of a femoral neck or a trochanter bone.

[0002]

2. Description of the Related Art A conventional orthopedic treatment method for a femoral neck fracture is, for example, as shown in FIG.
As shown in 0, using a barrel plate of a single barrel, one lag screw is passed through the fractured surface of the affected area from the femoral neck and further screwed into the head of the head to tighten or fix the affected area. Depending on the situation, three canulated screws were screwed into the femoral head from the femoral neck and fixed.

However, in these methods, since the strength of the bone is weak, the lag screw or the cannulated screw moves up and down to cause so-called varus, or pivots to cause so-called rotation and corrective fixation is properly performed. There was an unavoidable drawback. Since the canned screw has a smaller thread than the lag screw, it is convenient for screwing and fixing even if the bone to be fixed in the affected area is small, but it has the disadvantage that the fixing force for the bone is small. On the other hand, when the bone to be fixed in the affected area is large, the lag screw having a large-diameter threaded portion is more advantageous because the fixing force is larger than the canned screw having a small-diameter threaded portion. If it is small, it has a drawback that it is difficult to use.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to overcome the above-mentioned conventional drawbacks and reduce and fix a femoral neck or a trochanteric fracture affected area by using a fixing tool of which the size of the affected bone is large. It is an object of the present invention to provide a femoral neck or trochanteric bone fracture reduction device having a novel structure that does not easily cause varus and / or rotation in the bone.

[0005]

SUMMARY OF THE INVENTION A fracture reduction device according to the present invention comprises a flat and elongated handle head, an upper barrel portion having a predetermined obtuse angle with the handle, and a lower barrel portion parallel to the upper barrel portion. A barrel plate provided in the upper and lower barrel portions, both a lag screw and a cantilevered screw are engaged with each other so that they can be moved forward and backward, locked, and detachable. Is provided with a plurality of cortical screw locking holes, and the upper and lower barrel portions are integrally provided with the handle, so that the lag screw or the canilated engaged with them. Screws are less prone to varus or convolution within the trochanteric bone or head.
Depending on the size of the affected bone, either a lag screw or a canulated screw can be appropriately selected to penetrate into the affected bone, and the bases of these screws can be installed in the two barrel portions of the barrel plate.

[0006]

In the use of the fracture reducing / fixing device according to the present invention, after reducing the affected bone due to a fracture of the femoral neck or trochanter, the femoral neck or the trochanter bone penetrates through the affected area to reach the head of the bone. Insert two parallel guide pins,
In addition, two parallel circular holes obtained by threading the reamer through each guide pin to the head of the bone using a reamer,
A female screw is formed in the circular hole with a tap, and a lag screw or a canilated screw is screwed into the female screw formed in one of the two circular holes, and the base is integrated with the barrel plate. Attach it to the barrel that is formed on the. A canned screw or a lag screw is screwed into the female screw formed in the other circular hole, and the base portion is attached to another barrel portion formed integrally with the barrel plate. And fix the barrel plate to the cortical bone with multiple cortical screws,
Completely tighten the lag screw or canned screw in each barrel part to the barrel plate with the compression screw. In this way, the lag screw and the cannulated screw bring the femoral head into close contact with the femoral neck or the fractured part of the trochanteric bone and fuse them together.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional view of an affected part fracture line 2 of a femoral neck 1. FIG. 2 is an explanatory diagram of a bone fracture reduction surgery sequence using one embodiment of the present invention. Further, FIG. 3 is an explanatory diagram of the operation sequence after FIG. In the operation sequence, (1) first, after reducing the affected area of the fracture, use the angle guide 3 to insert the two guide pins 4 and 5 into the A center line and the B center line of FIG. Insert along. At this time, the guide pin is at least 10 from the upper part of the neck and 8 from the lower part.
Insert so that there is a distance of 5 pieces. (2) Next, the depth of each of the guide pins 4 and 5 is measured using a depth gauge (not shown). (3) A reamer (not shown) is used to accurately pass the reamer through the reamer at both points A and B to form circular holes. (4) Tap the A side (tapping), and then tap the B side.
(5) Insert the lag screw 6 of appropriate length into the A side. (6) The barrel plate 7 is attached to the base of the lag screw 6. (7) Fix the lag screw 6 with the compression screw 8 tightly, but be careful not to overtighten at this time and lightly tighten. (8) Insert the canned screw 9 on the B side, but do not tighten it too much. (9) Cortical screw 10
Fix barrel plate 7 with respect to cortical bone. (1
0) Fully tighten the canned screw 9,
Then tighten the compression screw to the handle completely.

The ridge of the lag screw 6 on the A side has a diameter of, for example, 10 grits and a valley has a diameter of 6 grits, but the base has a diameter of 7 grits. On the other hand, the diameter of the base portion of the B side canned screw 9 is the same as that of the lag screw 6, and the diameter of the mountain portion is the same as that of the base portion.
It is gruel, and the diameter of the valley is 4.6 gruel. Since both the lag screw and the canned screw have a diameter of 7 grits, they can be inserted in the barrel on the A side and the barrel on the B side interchangeably with either the lag screw or the canned screw. You can wear it. The bases of both the lag screw and the canned screw are hollow as shown in FIGS. 4 and 5, and internal threads are engraved inside. It is tightened by a compression screw 11 from the outside of the barrel plate 7. As shown in FIG. 9, in the present embodiment, the outer diameter of the barrel is, for example, 10.2 mm on both the A side and B side, and the distance between the A side barrel and B side barrel is 3.2 mm, and as shown in FIG. As described above, the axis line 14 connecting the hole centers of the A-side barrel end hole 12 and the B-side barrel end hole 13 provided in the barrel plate 7 is deviated from the longitudinal axis 15 of the barrel plate by, for example, 15 °. Further, as shown in FIG. 1, a plurality of cortical screw holes 17 are provided in the barrel plate to further strengthen the fixation between the barrel plate 7 and the bone by penetrating the cortical bone by the cortical screw 10. In this embodiment, the dimensions and angles are as described above, but these can be changed as required.

[0009]

The fracture reducing device according to the present invention is constructed as described above, and in particular, a lag screw or a barrel plate is integrally formed with the barrel plate, and a lug screw or Since any of the cannulated screws can be attached interchangeably, it can be inserted and fixed according to the shape of the affected bone, and there are two barrels, and each insertion screw is firmly fixed and supported. Due to the presence of these screws, these screws do not rotate and reverse in the bone during reduction and fixation. Therefore, there is an effect that the healing of the fractured part is accelerated.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram showing application of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a bone fracture reduction and fixation surgery sequence according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a surgery order after FIG.

FIG. 4 is a detailed view of the lag screw 6 in FIG.

5 is a detailed view of a canned screw 9 in FIG.

6 is a detailed view of the compression screw 8 in FIG.

FIG. 7 is a detailed view of the cortical screw 10 in FIG.

8 is a front view of the barrel plate 7 in FIG. 1. FIG.

9 is a side view of the barrel plate 7 in FIG. 1. FIG.

FIG. 10 is a schematic explanatory view showing a conventional example.

[Explanation of symbols]

 1 Femoral neck 2 Fracture line of affected area 3 Angle guide 4 Guide pin 5 Guide pin 6 Lag screw 7 Barrel plate 8 Barrel 9 Canulated screw 10 Cortical screw 11 Compression screw 12 A side barrel end hole 13 B side barrel End hole 14 Barrel plate AB hole axis 15 Barrel plate longitudinal axis

Claims (1)

[Claims] 1. A barrel plate in which a flat elongated handle has an upper barrel portion at a predetermined obtuse angle with the handle, and a lower barrel portion parallel to the upper barrel portion integrally with the handle, the barrel plate comprising: Both the lag screw and the cantilevered screw are engaged with the lower barrel part and the lower barrel part so that they can be moved forward and backward, locked, and detachable, and a plurality of cortical screw locking holes are further below the handle. A barrel plate for reducing and fixing fractures, characterized by being provided with.