JP2002360598A - Synostosis promoting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synostosis promoting device of a vibration stimulation system which is capable of promoting the synostosis after fracture and bone extension by a simple structure. SOLUTION: This device has vibration generating means, means for transmitting the vibration by the vibration generating means to the pins of an external fixation device and imparting vibration stimuli to the bone through the pins and means for controlling the vibration conditions of the vibration generating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bone fusion promoting device, and more particularly to a vibration stimulation type bone fusion promoting device.

[0002]

2. Description of the Related Art In order to promote bone fusion after a fracture or after bone lengthening, conservative treatment such as casting, fixation with splint, percutaneous steel wire fixation, and external fixation An external fixation method using a vessel has been used.However, the external fixation method is widely used because it can be reduced without expanding the fractured part, and the fixation force is excellent and early automatic movement is possible. I have.

Means for external fixation (external fixator)
There are various types, but in general, a plurality of pairs of pins are inserted into the bone at right angles to the bone axis near the fracture, and multiple bones are inserted into the bone at right angles to the bone axis at a site far from the fracture. A set of pins was inserted into the set, and a pin clamp was attached to each set of pins, and the pin clamps were connected with a bar.

[0004]

However, the conventional external fixation is a natural healing method in which the fracture is fixed so as not to move and the bone healing is promoted by natural regeneration of the bone tissue. Healing effect could not be expected, and there was a limit to realizing early nail removal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vibration-stimulating method capable of promoting bone union after a fracture or a distraction by a simple structure. To provide a bone fusion promoting device.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vibration generating means, and transmits vibration by the vibration generating means to a pin of an external fixator and applies vibration stimulation to a bone via the pin. And a means for controlling a vibration condition of the vibration generating means.

More specifically, the device of the present invention comprises a vibrator main body having a vibrator, a support member having the vibrator main body fixed to an intermediate portion, and an external fixator attached to an outer portion of the support member. The vibrator body includes a controller including a battery and a circuit for controlling the operation time and operation interval of the vibrator. The connection member includes a screw that penetrates the support member, and a clamp nut that is screwed into the support member and presses the pin against the support member. Preferably, the position of the connection member is variable along the support member. I have.

Further, the present invention comprises a vibrator main body having a vibrator, and a fixing member for detachably fixing the vibrator main body to a bar connecting a pin clamp of an external fixator, wherein the vibrator main body is provided. It has a built-in controller including a circuit for controlling the operation time and operation interval of the battery and the vibrator. This embodiment has an advantage that the number of parts can be reduced because the supporting member and the connecting member can be omitted.

Further, the present invention comprises a vibrator, a fixing member for detachably fixing the vibrator to a bar connecting a pin clamp of an external fixator, and a vibrator main body electrically connected to the vibrator. The vibrator body has a built-in controller including a battery and a circuit for controlling the operation time and operation interval of the vibrator. In this embodiment, since the supporting member and the connecting member can be omitted, the number of parts can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an example in which a first embodiment of a bone fusion promoting device according to the present invention is applied, wherein A is an external fixator, and in the illustrated case, two pins a, a and A pin clamp or a main body (hereinafter, referred to as a pin clamp) b, b attached to the upper end of each set of pins a, a, and a bar c that connects the pin clamps b, b and extends in parallel with the bone axis. Have. B is a bone fusion promoting device according to the present invention.

2 to 6 show an embodiment of a bone fusion promoting device according to the present invention, wherein 1 is a vibrator body,
It has a box-shaped casing 10 and a lid 11, and is fixed to a substantially central portion in the longitudinal direction of the strip-shaped support member 2 by an appropriate method such as a screw or an adhesive. Reference numeral 3 denotes a vibrator. In this example, a small vibration motor is used, and the vibrator main body 1 constitutes a vibration generator. As the vibration motor, for example, a rotation speed of 6000 to 9000 rpm, a vibration amount of 1.0
G and the like are used. In this example, the vibrator 3 is fixed to the outside of the casing 10 by an appropriate method such as adhesion.

The casing 10 contains batteries 1a, 1a as power sources and a controller 1b including a circuit for controlling the vibration operation time t and the operation interval T. The controller 1b
Is connected to the vibrator 3. A start / stop switch 1c for the vibrator 3 is provided outside the casing.

As shown in FIG. 4A, the control circuit synthesizes an oscillating circuit, a frequency dividing circuit for dividing an oscillating frequency signal to determine an operation time, and a signal from the frequency dividing circuit. A time signal generating circuit for generating a timing for causing the vibrator 3 to vibrate, and a driver for ionizing and amplifying a signal from the time signal generator and sending a drive signal to the vibrator 3.

FIG. 5 shows an example of the vibration conditions set by the control circuit.
It may be set at time intervals, and the crystal oscillator is 32.76.
In the case of 8 Hz, assuming that the time is set by dividing the oscillation frequency n times by １ ／, the vibration time t is 64 seconds. Within this time, an intermittent pulse t0 of 0.5 seconds interval is about 100 times.
Hz oscillations are produced. This vibration condition is the same in each embodiment described later.

Reference numerals 4 and 4 denote connecting members for pins a and a of the external fixator, which are arranged on the left and right of the vibrator body 1 of the support member 2 as a center. The connecting members 4 and 4
Clamp nuts 4a, 4a that abut against the ends of the pins a, a that protrude from the pin clamps of the external fixator from a perpendicular direction and are clamped between the support member 2 and the shaft portion that penetrates the support member 2 and The clamp nut 4a has a screw 4b that is screwed together with the clamp nut 4a and draws it toward the support member. The clamp nut 4a has a groove 40 that engages with the pins a.

The support member 2 is provided with an elongated hole 20 so that the connecting members 4 and 4 can move in accordance with the distance between the left and right sets of pins a and a of the external fixator A. 20
, The screw shaft portion is penetrated. The number of the connecting members 4 may be three or more in some cases. When there are three pins, two screws 4b are used to correspond between the pins, and penetrate through the support member 2 so that two screws 4b of the clamp nut 4a are formed.
Screwed into one female screw. FIG. 6 shows an example in which the first embodiment is applied to one-side fixing on both sides.

FIGS. 7 and 8 show a second embodiment of the present invention. In this second embodiment, a vibrator main body 1 having a vibrator 3
Is directly fixed to the bar b of the external fixator A. For this reason, the casing 10 of the vibrator main body 1 is provided with the fixing member 6 for the bar b. The fixing member 6 has a configuration corresponding to the cross-sectional shape of the bar b so as to hold the bar b so as not to move.

In FIG. 7A, since the bar b has a circular cross section, it has a band shape, and is fastened to the casing 10 by screws 6a with the bar b fitted.
In FIG. 7B, since the bar b has a rectangular cross section, it has a bifurcated plate shape, and is fastened to the side wall of the bar b by screws 6a with the bar b fitted. The fixing member 6 may be detachable from the bar b, or may be a bar with a unique, that is, a vibrating means that does not detach from the bar b. Since the configurations of the vibrator 3 and the vibrator main body 1 are the same as those of the first embodiment, the same portions are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 9 shows a third embodiment of the present invention.
In this embodiment, the vibrator 3 and the vibrator body 1 are separated, the vibrator 3 is directly fixed to the bar b of the external fixator A, and the vibrator 3 is And is suitable when the external fixator A has a relatively large size. In the third embodiment, a fixing member 6 for a bar b is provided on a base 30 of the vibrator 3. The fixing member 6 has the same configuration as that of the second embodiment. Since the configurations of the vibrator 3 and the vibrator main body 1 are the same as those in the first embodiment, the same portions are denoted by the same reference numerals, and description thereof will be omitted.

Since what is shown is only a few examples of the present invention,
Needless to say, the present invention is not limited to this. 1) In the first embodiment and the second embodiment, the vibrator 3 is not limited to being attached to the outside of the casing 10 of the vibrator body 1, but may be fixed to the inner wall of the casing 10 as shown in FIG.

2) The vibrator 3 is not limited to a vibration motor, but may be an electromagnetic vibrator or a piezoelectric element such as a piezo stack type piezoelectric element as shown in FIG. In the case of a piezoelectric element, a configuration in which the piezoelectric element is interposed at the center of the support member 2 or the bar b may be employed. 3) The device of the present invention can be applied not only to one-way one-side fixing but also to one-way both-side fixing as shown in FIG. 6, and is applied to one-way four-side fixing, two-way fixing and the like. Further, the device of the present invention is effective at the time of a finger fracture, but is not limited to this case, and can be applied to various fracture sites such as a toe fracture, a forearm or upper arm fracture, a lower leg fracture, and a femur fracture.

[0022]

The operation and operation of the embodiment will now be described. In the first embodiment, the pins a, a of the external fixator A are inserted into a fracture site, for example, a fracture site of a finger. And
In a state where the pin clamps b, b are fixed to the upper end portion and the pin clamps b, b are connected by the bar c, the device B of the present invention is mounted so that the support member 2 is positioned parallel to the bar c. A, and the grooves 40, 40 of the clamp nuts 4a, 4a of the connecting members 4, 4 are brought into contact with the upper ends of the pins a, a projecting from the pin clamps b, b.
4b is rotated. Thus, the pins a, a are held between the clamp nuts 4, 4a and the support member 2.

Since the operation time t and the operation interval T are set in advance in the controller 1b, when the power switch 1c is turned on, the control circuit is energized and the vibrator 3 is energized via the driver. For example, 6
Vibration of about 100 Hz is generated by intermittent pulses at 0.5 second intervals for 4 seconds. The vibration is transmitted from the casing 10 to the strip-shaped support member 2, and the support member 2 vibrates in the longitudinal direction.
Through the pins a, a, and to the bone C via the pins a, a.

When vibration is applied for a certain period of time, the driving of the vibrator 3 is stopped, and after a set interval, for example, about 9 hours, the vibrator 3 is driven again, and the pins a, a Vibration is applied to the bone C via. The impact of vibration in the longitudinal direction of the bone as described above generates a piezo-electric current in the bone, which stimulates collagen fibers and activates metabolism, thereby promoting callus formation.
Therefore, bone fusion is effectively promoted.

At the time of needle removal, the connection with the pins a, a is released by loosening the connecting members 4, 4, so that it can be easily removed from the external fixator A and used repeatedly for another diseased part.

In the second embodiment, since the vibrator body 1 having the vibrator 3 is fixed to the bar b of the external fixator A by the fixing member 6, the pin a of the external fixator A is located at the fracture point. , A are inserted, the pin clamps b, b are fixed to the upper end, and these pin clamps b, b need only be connected with the bar c. When the power switch 1c is turned on, the control circuit is energized, Electric power is supplied to the vibrator 3 via the driver, and the bar c vibrates in the longitudinal direction, so that the bar c is transmitted to the pins a, a through the pin clamps b, b and transmitted to the bone C via the pins a, a.

In the third embodiment, since the vibrator 3 is fixed to the bar b of the external fixator A by the fixing member 6, the pins a, a of the external fixator A are inserted into the fracture. It is only necessary to fix the pin clamps b, b at the upper end and connect the pin clamps b, b with the bar c. When the power switch 1c of the external vibrator body 1 is turned on, the control circuit is energized. The vibrator 3 is energized via a driver, and the bar c vibrates in the longitudinal direction, so that the bar c is transmitted to the pins a, a via the pin clamps b, b, and transmitted to the bone C via the pins a, a.

[0028]

According to the first aspect of the present invention, vibration generating means, means for transmitting the vibration generated by the vibration generating means to the pin of the external fixator, and providing vibration stimulation to the bone via the pin; Since the apparatus is provided with means for controlling the vibration conditions of the vibration generating means, an excellent effect that bone fusion after fracture or bone extension can be promoted under optimum conditions with a simple structure can be obtained.

According to the second aspect, a vibrator main body 1 having a vibrator 3, a support member 2 having the vibrator main body 1 fixed to an intermediate portion, and an external fixation mounted on an outer portion of the support member 2 Connecting members 4 and 4 for the ends of the pins of the container A,
Since the vibrator main body 1 has a built-in controller 4b including a battery 4a and a control circuit, a small and simple structure provides appropriate stimulation at an optimal vibration time and interval for a bone after a fracture or a distraction. An excellent effect that bone fusion can be promoted is obtained.

According to the third aspect, since the connecting member 4 is provided with the screw 4b penetrating through the support member and the clamp nut 4a screwed into the screw 4b and pressing the pins a, a against the support member 2, the connecting member 4 is surely provided. An excellent effect that vibration can be transmitted to the pins a, a can be obtained. According to claim 4,
Since the position of the connecting member 4 is variable along the supporting member 2, an excellent effect that one device can cope with a change in the insertion position of the left and right pins a, a is obtained.

According to the fifth aspect, there is provided a vibrator main body 1 having a vibrator 3 and a fixing member 6 for fixing the vibrator main body 1 to a bar c connecting the pin clamps b of the external fixator A, Since the vibrator body 1 has a built-in controller 1b including a battery 1a and a circuit for controlling the operation time and operation interval of the vibrator 3, the number of parts is small and the configuration can be simplified. The effect is obtained.

According to the sixth aspect, the vibrator 3 and the bar c connecting the pin clamps b, b of the external fixator A to the vibrator 3
And a controller 1b including a vibrator main body 1 electrically connected to the vibrator 3, the vibrator main body 1 including a battery 1a and a circuit for controlling the operation time and operation interval of the vibrator 3. The excellent effect that the additional load to the external fixator A can be reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a bone fusion promoting device according to the present invention in a used state.

FIG. 2 is a rear view of the first embodiment of the bone fusion promoting device according to the present invention.

FIG. 3A is a partially cutaway plan view of the first embodiment, and FIG.
Is a partially enlarged view of FIG.

4A is a diagram of a control system according to the present invention, and FIG. 4B is a power supply circuit diagram.

FIG. 5A is an explanatory diagram showing an example of a vibration condition of the present invention,
(B) is a partial enlarged view of (a).

FIG. 6 is an explanatory diagram showing another application example of the first embodiment.

FIGS. 7A and 7B are partially cutaway side views showing a second embodiment of the present invention.

FIG. 8 is a perspective view showing a use state of the second embodiment.

FIG. 9 is a side view showing a third embodiment of the present invention.

FIG. 10 is a partial side view showing another embodiment of the driving means of the present invention.

FIG. 11 is a side view showing another embodiment of the present invention.

[Description of Signs] 1 Vibrator main unit 1a Battery 1b Controller 2 Support member 3 Vibrator 4 Connecting member 4a Clamp nut 4b Screw 6 Fixing member A External fixator a, a pin b, b Pink lamp c bar

Claims (6)

[Claims] 1. Vibration generating means, means for transmitting vibration by said vibration generating means to a pin of an external fixator, providing vibration stimulation to a bone via the pin, and means for controlling vibration conditions of said vibration generating means. A bone fusion promoting device comprising: 2. A vibrator body 1 having a vibrator 3, a support member 2 having the vibrator body 1 fixed at an intermediate portion, and a support member 2.
Attached to the outer part of the external fixator A,
The vibrator body 1 has a built-in controller 1b including a battery 1a and a circuit for controlling the operation time and operation interval of the vibrator 3. The bone fusion promoting device according to claim 1. 3. The bone according to claim 2, wherein the connecting member 4 includes a screw 4b penetrating the support member 2, and a clamp nut 4a screwed into the screw 4b to press the pins a, a against the support member 2. Healing promoting device. 4. The bone fusion promoting device according to claim 2, wherein the position of the connecting member is variable along the supporting member. 5. A vibrator main body 1 having a vibrator 3 and a fixing member 6 for fixing a bar c connecting the pin clamps b of the external fixator A to the vibrator main body 1.
2. The bone fusion promoting device according to claim 1, wherein the device incorporates a controller 1b including a circuit for controlling the operation time and operation interval of the battery 1a and the vibrator 3. 6. A fixing member 6 for a vibrator 3 and a bar c connecting the vibrator 3 to pin clamps b of the external fixator A.
And a vibrator main body 1 electrically connected to the vibrator 3. The vibrator main body 1 has a built-in controller 1 b including a battery 1 a and a circuit for controlling the operation time and operation interval of the vibrator 3. The bone fusion promoting device according to claim 1, wherein: