JP3338944B2 - Spinal deformity correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a correction device for use in correcting a congenital or acquired spinal deformity.

[0002]

2. Description of the Related Art Scoliosis, kyphosis, which are common in adolescence,
Congenital or acquired spinal deformities such as caries deformities, spondylolisthesis, and spinal injury
s) Orthodontic surgery has long used Harrington instruments (Har
a hook member called a Rington instrument), the correction device comprising a rod member for locking this is, or, as an improvement of such Harrington instrument, the Kokoku No. 6-20466 in accordance with the present applicant filed There are devices for correcting spinal deformities.

The above-mentioned Harrington device and Japanese Patent Publication No. 6-2
The device for correcting spinal deformity of No. 0466 hooks two hook members provided on a rod member on a lateral process or a vertebral arch of a spine, stretches a rod member between the two hook members, and fixes the deformed spine. This is achieved by straightening and straightening and fixing the straightened state.

[0004]

Although these known devices for correcting spinal deformities can generally perform an effective correction for an adult patient whose bone growth has subsided and is in a stable state ,
For patients of spinal deformity disease in the growth phase of the bone, such as young Shoko, not necessarily advantageous. In other words, if the spine is corrected for a growing patient and this condition is kept fixed for a long time, not only will the growth of the spine be hindered, but also the progress of rotation deformation will increase with the growth after surgery because there is a tendency, in accordance with the growth of the hands of post-operative spinal column, from 1 to 6 months
Requires a surgery to change the length of the rod members constituting the correction device at every year, be carried out repeatedly surgery This effort, not easy from such time and economic, Patient distress is also an issue.

In view of the above situation, the present invention allows a rod member of a correction device, which is mounted inside the body by surgery, to be extended by remote control from outside the body while watching the degree of growth and deformation correction of the spinal column. It is intended to provide a device for correcting spinal deformity.

[0006]

In order to achieve this object, according to the first aspect of the present invention, there is provided a fixing member having a hook member having a hook for hooking on a spine, which is slidably provided. a cylindrical case body formed by providing at one end of the rod, with forward and reverse rotation is fixed a reduction gear with a motor capable, fitted with a cylindrical rotating member that rotates in conjunction with the speed reducer with the motor In the rotating member, a base member of a movable rod, which is provided with a hook member slidably provided at a distal end thereof for hooking on a spine, is provided with a sealing member for closing an opening of the case body. The rotating rod is rotated in the case body by the operation of the motor with the speed reducer, and the movable rod is substantially moved along the cylinder axis direction of the case body in synchronization with the rotation of the rotating member. Transfer It is allowed to freely adjustable the length of the movable rod, connecting the motor with the reduction gear, via a line
Radio control receiver
A device for correcting spinal deformity, wherein the device is operated by controlling the spine.

According to a fourth aspect of the present invention, a fixing rod having a hook member having a hook for hooking on a spine is slidably provided in a cylindrical sheath member. The inside of the opening side of the cylindrical case body provided in the part is provided, and a motor with a speed reducer and a cylindrical rotating member that rotates in conjunction with the motor with the speed reducer are provided in the case body. Within the member, the base end of the movable rod, which is provided with a hook member slidably provided with a hook for hooking to the spine at the distal end, the opening of the case body and one opening of the sheath member. The sealing member to be closed is penetrated and inserted, and the rotating member is rotated by the operation of the motor with the speed reducer.In synchronization with the rotation of the rotating member, the case body and the movable rod are moved in the cylinder axis direction of the sheath member. Substantially moved me, and freely adjustable length between the fixing rod and movable rod, the
A radio controller that links a motor with a speed reducer
Controlling the troll receiver with a radio controller
A device for correcting spinal deformity, wherein the device is operated by:

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a correction device capable of freely extending the length of a rod constituting a correction device fixed to a spine in accordance with a growth degree of a spine in correcting a spinal deformity. Te, correction device according to claim 1, the same other rod provided with a hook member to one of the rods provided with a hook member so as to expand and contract, a correction device of a so-called single direction.

The straightening device according to the fourth aspect is a so-called multiple straightening device for extending and contracting one of the rods provided with the hook members and the other rod also provided with the hook members.

[0010] In the invention of claim 1, the rotating member is threaded is formed in the inner circumferential surface, a screw formed on the outer peripheral surface of the proximal end portion of the movable rod to the screw is engaged, with the speed reducer The movable rod moves substantially along the cylinder axis of the case body in synchronization with a rotating member that rotates in conjunction with the rotation of the motor.

Further, the movable rod forms a flat surface by cutting a part of the upper surface of the round bar, and the flat surface engages with an engagement piece provided on a seal member for closing an opening of the case body. By doing so, the movable rod is configured to move substantially along the cylinder axis direction of the case main body without rotating.

The motor with a speed reducer used in the motor is capable of rotating forward and backward, and operates a radio control receiver that is linked to the motor with the speed reducer via a lead by controlling the radio controller. .

[0013] On the other hand, in the invention according to claim 4 , the case main body has a screw formed on an inner peripheral surface thereof, the screw is engaged with a screw provided on an outer peripheral surface of the rotating member, and the rotating member is provided with a screw. The screw formed on the inner peripheral surface of the movable rod engages with the screw formed on the outer peripheral surface of the base end of the movable rod, and synchronizes with the rotating member that rotates in conjunction with the rotation of the motor with the speed reducer, The case body and the movable rod substantially move along the cylinder axis direction of the sheath member.

Further, the movable rod forms a flat surface by cutting a part of the upper surface of the round bar, and the flat surface engages with an engaging piece provided on a seal member for closing an opening of the case body. By doing so, the movable rod is configured to move substantially along the cylinder axis direction of the sheath member without rotating.

[0015] The motor with a reduction gear to be used is the above-mentioned claim 1.
In the same manner as in the apparatus described above, the apparatus can rotate forward and backward, and operates a radio control receiver that operates in conjunction with the motor with a reduction gear via a conductor by controlling the radio controller.

Further, the case body has a slit formed in a part of the upper surface thereof along the cylinder axis direction, and a ring member for penetrating and holding a drive shaft of a motor with a speed reducer is provided in the case body. In integrating the ring member and the sheath member covering the case body with screws,
The shaft portion of the screw is positioned in the slit to prevent rotation of the case member and to move only along the cylinder axis direction of the sheath member.

Each of the members constituting the straightening device of the present invention is made of a metal material having high strength and harmless to the human body, such as stainless steel, a titanium alloy, and molybdenum-nickel chrome steel. It is desirable that the outer surface portion be as smooth and rounded as possible so as not to damage the human body. In addition, the motor with a speed reducer incorporates a gear head having a predetermined reduction ratio in a DC motor, and satisfactorily satisfies the output required for the expansion and contraction drive of the rod, and can easily perform an operation capable of providing a predetermined rotation speed. It is a high-performance ultra-compact device.

[0018]

According to the spinal deformity correcting apparatus of the present invention, the length of the rod of the correcting apparatus provided between the vertebrae to be corrected is connected to a motor with a speed reducer according to the degree of growth of the vertebral column.
The radio control receiver linked via the
By controlling with a geocontroller, it is possible to freely adjust from outside the human body, so that the number of operations can be greatly reduced. Although this correction device is intended to correct spinal deformity, it can also be used, for example, for treatment of fractures of the lower limb bones, femur bones, and arms, and for treatment of bone lengthening.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for correcting spinal deformity according to an embodiment of the present invention. 1 to 3, there is shown an embodiment of a correction device spinal column deformation according to claim 1, correction device 1 of the spinal deformity
A cylindrical case main body 3 integrally provided with a round rod-shaped fixed rod 2 at the distal end side; a motor 4 with a speed reducer provided in the case main body 3; It comprises a cylindrical rotating member 5 rotated by a motor 4 with a reduction gear, and a round rod-shaped movable rod 6 which appears and disappears in the case body 3 in synchronization with the rotation of the rotating member 5.

The case body 3 has a fixed rod 2 integrally provided on a closed surface 3b of a cylindrical body 3a having a closed front end so as to be coaxial with the axis of the cylindrical body 3a, and an opening at the other end. Is formed so as to be sealed by the seal member 10.

The inside of the case main body 3 has a through hole 7 in the center, is partitioned by a disk-shaped ring member 9 fixed in the case main body 3 with screws 8 , and the closed front end has a positive side. A motor 4 with a speed reducer capable of reversing and reversing is provided,
The rotating member 5 is provided rotatably on the opening side.

The fixing rod 2 is slidably provided with one hook member 11 for fixing the spinal deformity correcting device 1 to a required portion of the spine.

The hook member 11 has a hook 13 on one side surface of the block body 12 and has an attachment hole for slidably attaching the hook member 11 to the fixed rod 2. Is fixed to a gap formed between the inner peripheral surface of the mounting hole and the outer peripheral surface of the fixing rod 2 by cylindrical wedge members 14a and 14b.
By press-fitting.

The motor 4 with a speed reducer provided in the case main body 3 is mounted on a ring member 9 that partitions the inside of the case main body 3 so as not to rotate by screwing.

A rotating member 5 rotatably provided in the case body 3 is provided with a motor 4
And a screw 5a is formed on the inner peripheral surface over the entire length.

The motor 4 with a speed reducer is connected to a radio control receiver 19 provided outside or inside the body by a conducting wire 18, and rotates forward or backward by operating a switch of a radio controller 20 to move the movable rod 6 to the case body 3. The distance between the hook member 11 locked to the fixed rod 2 and the hook member 15 locked to the movable rod 6 can be freely adjusted by the expansion and contraction.

[0027] The movable rod 6 to rotate in synchronization with the rotation member 5, the outer peripheral surface of the distal end portion, in which a screw 6a of the screw 5a engages which is formed on the inner peripheral surface of the rotary member 5 is formed the proximal end is the one that passes through the hole provided at the center portion of the sealing member 10 protrudes out of the case main body 3, when the rotary member 5 is rotated by the rotation of the deceleration motor with 4 Since the screw 5a provided on the inner peripheral surface of the rotating member 5 and the screw 6a of the movable rod 6 are engaged, the movable rod 6 expands and contracts with respect to the case body 3 in the cylinder axis direction.

On the base end side of the movable rod 6 protruding from the case body 3, similarly to the fixed rod 2, a hook 16 is formed on one side, and a through hole for loosely fitting the movable rod 6 is formed. A hook member 15 made of a block body is slidably provided. The hook member 15 is fixed to a predetermined position with respect to the movable rod 6 by wedge members 17a and 17b.

The fixed rod 2, the case main body 3, the rotating member 5, the movable rod 6, the seal member 10 and the like have a large strength such as stainless steel or molybdenum-nickel chrome steel and a human body so as not to be corroded. It is made of a material that is harmless to the outside, and has a smooth outer surface to avoid damage to the human body.

In this embodiment, the fixed rod 2 has a diameter of about 6 mm, a length of about 70 mm, an outer diameter of the case body 3 of about 18 mm, an inner diameter of about 13 mm, a length of about 215 mm, and an outer diameter of the rotating member 5. Is about 13 mm, the inner diameter is about 6.5 mm, the length is about 119 mm, and the outer diameter of the movable lot 6 is about 6.
5 mm, length about 200 mm.

When the rotating member 5 is rotated by the rotation of the motor 4 with a speed reducer, and when the rotating member 5 expands or contracts by rotating in synchronization with the rotation of the rotating member 5, the movable rod 6 is prevented from rotating. Therefore, the upper surface of a predetermined range of the movable rod 6 is cut to form a flat surface 6b, and the sealing member 1
An engagement piece 10a protruding downward is provided in an upper portion of the through-hole formed in the opening 0, and the engagement of the engagement piece 10a and the flat surface 6b prevents rotation of the movable rod 6.

The apparatus for correcting spinal deformity 1 having the above-mentioned structure.
Operates as follows. When the radio controller 20 is operated to rotate the motor 4 with a speed reducer, the rotating member 5 integrated with the drive shaft 4a is rotated. This rotating member 5
A screw 5a is formed on the inner peripheral surface of the movable rod 6 over its entire length, and the screw 5a is engaged with a screw 6a provided on the outer peripheral surface of the distal end of the movable rod 6, so that the rotating member 5 rotates and the movable rod 6 Moves relative to the case body 3 to extend the movable rod 6 substantially rightward as shown in FIG.

At this time, the motor 4 with the speed reducer is
This prevents itself from rotating. Also,
The movable rod 6 has a flat surface 6b provided in a part in the axial direction,
The rotation is prevented by the engagement with the engagement piece 10a provided on the seal member 10, and the movable rod 6 can be extended up to about 70 mm at the maximum only by the rotation of the rotation member 5 substantially. 4 can be reduced by reversing. Therefore, after engaging the hooks 13 and 16 of the hook members 11 and 15 with the transverse process or the facet joint at the position where the incised vertebral column should be corrected, the motor 4 with the reducer By performing forward and reverse rotation, the spinal deformity can be corrected and fixed very easily.

[0034] FIGS. 4-7, shows one embodiment of a correction device spinal deformity of claim 4, the correction device 31 of the spinal deformity is fixed round bar as shown in FIG. 4 A cylindrical case body 33 integrally provided with a rod 32 at the distal end side
A motor 34 with a speed reducer provided in the case body 33; and a cylindrical rotating member 35 provided in the case body 33 and rotated by the motor 34 with the speed reducer.
And the case body 33 in synchronization with the rotation of the rotating member 35.
The case comprises a round rod-shaped movable rod 36 which comes and goes inside, and a cylindrical sheath member 37 which covers most of the outer peripheral portion of the case main body 33.

In the case body 33, a round rod-shaped fixing rod 32 is integrally provided on a closed surface 33b of a cylindrical body 33a having a closed front end so as to be coaxial with the axis of the cylindrical body 33a. A slit 33c is formed in the portion (almost the center in the embodiment) along the axial direction.

The interior of the case main body 33 is defined by a disk-shaped ring member 38 having a through hole 38a at the center, and a motor 34 with a speed reducer capable of normal rotation and reverse rotation is provided at the closed front end. A cylindrical rotating member 35 is rotatably provided on the opening side, and a screw 3 is provided on an inner peripheral surface other than a portion where the motor 34 with a speed reducer is mounted.
3d is provided.

The fixing rod 32 is slidably provided with one hook member 41 for fixing the spinal deformity correcting device 31 to a required portion of the spine.

The hook member 41 has a hook 43 on one side surface of a block body 42 and a hook member 41.
Has a mounting hole for slidably mounting the fixing member 32 on the fixing rod 32.
1 is fixed to a gap formed between the inner peripheral surface of the mounting hole and the outer peripheral surface of the fixing rod 32 by a cylindrical wedge member 44.
a and 44b are press-fitted.

The motor 34 with a speed reducer provided in the case body 33 is mounted non-rotatably by screwing the inside of the case body 33 to a ring member 38 for partitioning. It is fixed to a sheath member 37 described later via a screw 39.

A rotatable member 35 rotatably provided in the case body 33 has a drive shaft 34a of a motor 34 with a speed reducer integrally mounted within the distal end portion of the cylindrical body, and a screw 35a extending over the entire inner peripheral surface thereof. Is formed,
Most of the outer peripheral surface is formed with a screw 35b which engages with a screw 33d formed on the inner peripheral surface of the case main body 33.

The motor 34 with a reduction gear is connected to a radio control receiver 4 provided outside the body by a conducting wire 48.
9, which rotates forward or backward by operating a switch of the radio controller 50 to extend and contract the movable rod 36 with respect to the case main body 33.
The distance between the hook member 41 locked on the fixed rod 32 and the hook member 45 locked on the movable rod 36 can be freely adjusted.

The movable rod 36, which rotates in synchronization with the rotation of the rotating member 35, has a rotating member 3
A screw 36 engaging with a screw 35a formed on the inner peripheral surface of the screw 5
a, the base end of which is
Through the holes provided in the central portion of the seal member 51 to close the opening of those protruding out of the case body 33, the rotating member 35 in synchronism with the rotation of the deceleration motor with 34 When rotated, the screw 35a provided on the inner peripheral surface of the rotating member 35 and the screw 36a of the movable rod 36 are engaged, so that the movable rod 36 expands and contracts with respect to the case main body 33 in the cylinder axis direction.

At this time, since the screw 35b provided on the outer peripheral surface of the rotating member 35 and the screw 33d provided on the inner peripheral surface of the case body 33 are also engaged, the case body 35 itself is naturally It expands and contracts along.

At the base end side of the movable rod 36 protruding from the case body 33, like the fixed rod 32,
A hook member 45 having a hook 46 on one side and formed of a block body having a through-hole loosely fitted to the movable rod 36 is slidably provided.
Is fixed at a predetermined position with respect to the movable rod 36 by wedge members 47a and 47b.

The sheath member 37 made of a cylindrical body is attached so as to cover most of the case main body 33. The base end of the sheath member 37 is kept secret by the seal member 51 and the tip end is kept secret by the seal member 52. is, was or, the sheath member 37 is one that is integral with the ring member 38 of the case body 33 through a screw 39, a portion of the shank of the screw 39 provided on the upper surface portion of the case body 33 since located in the slit 33c, when to case body 33 is moved in the cylinder axis direction with respect to the sheath member 37, screws 39 located within the slit 33c is a rotation of the case body 33 prevents In this way, the movement is restricted to only the cylinder axis direction.

The fixed rod 32, the case body 33,
The rotating member 35, the movable rod 36, the sheath member 37, and the sealing members 51 and 52 do not corrode and are made of stainless steel having high strength and harmless to the human body. The outer surface is made as smooth as possible to avoid damage to the human body.

In this embodiment, the fixed rod 32 has a diameter of about 6 mm, a length of about 70 mm, an outer diameter of the case body 33 of about 18 mm, an inner diameter of about 13 mm, and a length of about 170 m.
m, the outer diameter of the rotating member 35 is about 13 mm, and the inner diameter is about 8 m
m, the length is about 86.5 mm, the outer diameter of the movable lot 36 is about 8 mm at the maximum base end, about 7 mm at the shaft, and about 13 mm in length.
0 mm, outer diameter of sheath member is about 20 mm, length is about 13
4 mm.

When the rotating member 35 is rotated by the rotation of the motor 34 with a reduction gear, and the movable rod 36 is extended or contracted by rotating in synchronization with the rotating member 35, the movable rod 36 rotates. 7, the upper surface of the movable rod 36 is cut in a predetermined range to form a flat surface 36b, and the upper portion in the through hole 51a formed in the seal member 51 is formed as shown in FIG. An engagement piece 51b projecting downward is provided, and the engagement of the engagement piece 51b and the flat surface 36b prevents rotation of the movable rod 36.

The apparatus 3 for correcting spinal deformity having the above configuration
1 operates as follows. Radio controller 50
Is operated to rotate the motor with speed reducer 34, the rotating member 35 integral with the drive shaft 34a is rotated. A screw 35a is formed on the inner peripheral surface of the rotating member 35 over the entire length, and the screw 35a is engaged with the screw 36a provided on the outer peripheral surface of the distal end portion of the movable rod 36. At the same time as the rotation, the movable rod 36 moves relatively to the case body 33, and as shown in FIG.
The movable rod 36 extends substantially to the right.

At the same time, the rotating member 35 has a screw 35
b is provided, and since the screw 35b is engaged with the screw 33d formed on the inner peripheral surface of the case main body 33, the case main body 33 is extended substantially to the left.

At this time, the rotation of the movable rod 36 is prevented by the engagement between the flat surface 36b provided on a part of the axial direction and the engagement piece 51a provided on the seal member 51. In addition, the case body 33 is configured such that the ring member 38 and the sheath member 37 housed therein are connected via screws 39, and the screws 3
Since a part of 9 is located in the slit 33c provided in the case main body 33, the case main body 33 can be moved only along the cylinder axis direction.

By the operation of the rotating member 35, the movable rod 36 is moved up to about 35 mm, and the case body 33 is moved up to about 35 mm.
mm, can be extended within the scope of the total of about 70 mm, also Ki de be reduced by reversing the reduction gear with a motor 34, Therefore, a conventional method by the hook 43 of the hook member 41 and 45 46 It is very easy to correct and fix spinal deformity by locking the transverse spine or facet joint, etc., at the position where the spinal deformity in which the incision is to be corrected is to be corrected, by rotating the motor 34 with a speed reducer forward and reverse. You can do it.

[0053]

The apparatus for correcting spinal deformity according to the present invention provides a motor with a speed reducer in accordance with the degree of growth of the spine, by adjusting the length of the rod of the correcting apparatus provided between the spine for correcting the deformed part.
Radio control receiver that works with the data and conductors
By controlling the radio with the radio controller, the human body
Can be adjusted freely and reliably from outside
Thus, the number of operations can be significantly reduced. Thus, for patients in the growth phase, such as infants and adolescents, its growth noninvasive can be any time reliably implement blood specific stretching operation to suit, without requiring repeated surgery associated with surgery The pain of the patient can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a device for correcting spinal deformity of the present invention.

FIG. 2 is a partial longitudinal sectional view showing a main part of the straightening device shown in FIG.

FIG. 3 is a partial longitudinal sectional view showing an operation state of the straightening device shown in FIG.

FIG. 4 is a perspective view showing another embodiment of the spinal deformity correcting apparatus of the present invention.

FIG. 5 is a partial longitudinal sectional view showing a main part of the straightening device of FIG. 4;

FIG. 6 is a partial longitudinal sectional view showing an operation state of the straightening device shown in FIG.

FIG. 7 is a partially cutaway sectional view showing a relationship between a movable rod, a sheath member, and a seal member in FIG. 4;

[Explanation of symbols]

 1,31 Spinal deformity correction device 2,32 Fixed rod 3,33 Case body 4,44 Motor with reduction gear 5,35 Rotary member 6,36 Movable rod 9,38 Ring member 10,51,52 Seal member 11,15 , 41, 45 Hook 18, 48 Conductor 19, 49 Radio control receiver 20, 50 Radio controller

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-261441 (JP, A) JP-A-3-131251 (JP, A) JP-A-3-265473 (JP, A) JP-A 57- 203436 (JP, A) JP-A-3-118744 (JP, A) JP-A-8-308166 (JP, A) JP-A-8-308168 (JP, A) Japanese Utility Model Laid-Open No. 60-177303 (JP, U) Japanese Utility Model Application Showa 56-39002 (JP, U) Japanese Utility Model Application Hei 2-74017 (JP, U) Special Table Hei 6-511165 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 17/56 A61F 5/01

Claims (7)

(57) [Claims] 1. A hook member having a hook for hooking to slidably provided a cylindrical case body formed by providing the fixed rod at one end to the spine, with forward and reverse rotation is possible reducer motor And a cylindrical rotating member that rotates in conjunction with the motor with a speed reducer is mounted, and a hook member having a hook for hooking to a spine at a distal end portion is slidable in the rotating member. the base end portion of the movable rod formed by providing, inserted by penetrating the seal member to close the opening of the case body to rotate the rotating member in the case body by the operation of the motor with the reduction gear, the rotation in synchronization with the rotation of members, said movable rod is moved substantially along the cylindrical axis of the case body and freely adjustable to the length of the movable rod, the motor with the reduction gear, via a line Radio that works with
Control the receiver with a radio controller
A device for correcting spinal deformity, characterized in that the device is activated by the following . 2. The rotating member has a screw formed on an inner peripheral surface thereof, and a screw formed on an outer peripheral surface of a base end of the movable rod is engaged with the screw, and is interlocked with the rotation of the motor with a speed reducer. 2. The spinal deformity correcting apparatus according to claim 1 , wherein the movable rod substantially moves along the cylinder axis direction of the case body in synchronization with the rotating member that rotates. 3. The movable rod has a flat surface formed by cutting a part of an upper surface of a round bar, and the flat surface is engaged with an engagement piece provided on a seal member for closing an opening of a case body. by coupling, according to claim 1 in which the movable rod without rotating, characterized by being configured to move substantially along the cylindrical axis of the case body
Or the device for correcting spinal deformity according to 2. 4. A cylindrical sheath member, the opening side of the cylindrical case body formed by providing a fixation rod having a hook member slidably provided with a hook for hooking the spinal column to one end A motor with a speed reducer and a cylindrical rotary member that rotates in conjunction with the motor with the speed reducer are provided in the case body. Inserting a base end of a movable rod, which is provided with a hook member slidably provided with a hook, through a seal member for closing an opening of the case body and one opening of a sheath member, The rotating member is rotated by the operation of the motor with the attached member, and in synchronization with the rotation of the rotating member, the case body and the movable rod are substantially moved along the cylinder axis direction of the sheath member. A freely adjustable lengths between the rods, the motor with the reduction gear, interlocked via conductor Radio
Control the receiver with a radio controller
A device for correcting spinal deformity, characterized in that the device is activated by the following . 5. The case body has a screw formed on an inner peripheral surface thereof, the screw being engaged with a screw provided on an outer peripheral surface of the rotating member, and being formed on an inner peripheral surface of the rotating member. A screw is engaged with a screw formed on an outer peripheral surface of a base end portion of the movable rod, and the case body and the movable rod are synchronized with a rotating member that rotates in synchronization with rotation of the motor with a speed reducer. 5. The apparatus for correcting spinal deformity according to claim 4, wherein the apparatus moves substantially along the cylinder axis direction of the member. 6. The movable rod forms a flat surface by cutting a part of an upper surface of a round bar, and the flat surface engages with an engagement piece provided on a seal member for closing an opening of a case body. 6. The spinal deformity correction device according to claim 4 , wherein the movable rod is configured to move substantially along the cylinder axis of the sheath member without rotating. 7. The case body has a slit formed in a part of an upper surface thereof along a cylinder axis direction, and a ring member for penetrating and holding a drive shaft of a motor with a speed reducer is provided in the case body. When the ring member and the sheath member covering the case body are integrated by a screw, the shaft portion of the screw is positioned in the slit, and the rotation of the case member is prevented. The device for correcting spinal deformity according to claim 4, wherein the device is configured to move only along the spine.