KR20090097664A - Bone compression equipment for kyphoplasty - Google Patents

Abstract

A bone compression device for kyphoplasty is provided to expand an expandable structure uniformly by forming a plurality of adhesion units in the expandable structure spirally. A bone compression device for kyphoplasty includes an expandable structure(150) and an injector(160). The expandable structure is made of elastic material. The expandable structure is expanded when supplying the expanded fluid. The expandable structure is contracted when the expandable fluid is contracted. A plurality of adhesion units(151) are formed in the circumference of the expandable structure. The injector is connected to the expandable structure. The injector includes a piston rod(140) and a key control knob(110). The injector controls the piston rod by rotating the key control knob clockwise or counter clockwise.

Description

Bone compression equipment for kyphoplasty

The present invention relates to a bone compression device for posterior vertebral plastic surgery, more specifically, the expandable structure is smoothly inserted into the body, the entire circumference of the expandable structure is uniformly inflated, the control of the piston rod is made simple and stable It relates to a bone compression device for posterior spinal plastic surgery.

Kyphoplasty is a minimally invasive method that has been developed to access and treat lesions or fractured bones, such as collapse or broken fractures in patients with osteoporosis. In vertebral pedicle surgery, the surgeon manipulates the spongy bone or cortical bone of a fractured vertebra with a surgical tool, then injects a cavity filler, such as bone cement, into the cavity formed in the vertebrae to treat and reinforce the bone and no longer fracture the bone. Prevent collapse.

This procedure is a method for reducing the pain and discomfort of patients suffering from vertebral compression fractures and reinforcing the fractured vertebrae so that no more fractures occur. In the case of postprandial plastic surgery, the operator can either conquer or treat the fractured bone before fixation and allow the cavity to form in the vertebra to be filled with filler.

The filler forms internal hardened material in the vertebrae, supporting the vertebrae against load. Postoperatively, the operator can restore the spine's anatomical position and load-bearing force to the state before the fracture, and also minimize the possibility of filling or spilling out of the bone to be treated. Can be.

1 is a perspective view showing one embodiment of a bone compression device used in such a posterior spinal plastic surgery, which serves to compress the cavernous bone, raise the cortical bone to an anatomical position, and form a cavity in the bone to be treated.

Such a conventional bone compression device for posterior vertebral plastic surgery includes an y-type adapter 1, a tube assembly 2 connected to one side of the y-type adapter 1, and an expandable structure provided at an end of the tube assembly 2 ( 5) and a syringe 7 connected to the y-type adapter 1 to supply the expansion fluid thereto.

The y-type adapter 1 has an internal passage through which fluid or the like for expanding the expandable structure 5 can pass. The tube assembly 2 includes an outer tube 3 and an inner tube 4 penetrating the outer tube 3. In such a tube assembly 2, a flow passage is formed between the outer tube 3 and the inner tube 4.

The expandable structure 5 receives the expandable fluid and the expandable structure 5 expands or expands as the expandable fluid is filled in the expandable structure 5. In such a process, the expandable structure 5 compresses the spongy bone, compresses or lifts the cortical bone, and forms a cavity in the bone.

The syringe 7 includes a cylinder 8 connected to the y-type adapter 1, a piston 12 reciprocating the inside of the cylinder 8, and a piston 12 connected to the piston 12 so as to reciprocate it, and having a male screw portion around the cylinder 12. A piston rod 9 having an 11 formed therein, a piston handle 10 connected to an end of the piston rod 9 to move the piston rod 9 back and forth along the cylinder 8, or the cylinder 8; Is rotated in a clockwise or counterclockwise direction, and is composed of a detachable lever 13 formed with a female threaded portion (not shown) to be engaged with or separated from the male threaded portion 11 of the piston rod 9.

Here, the contracted state before the expansion of the expandable structure 5 has a form in which the three circumferential portions of the expandable structure 5 are contracted toward their center side, so that three flat ribs are formed radially. When the expansion fluid is introduced into the expandable structure 5, the expandable structure 5 in a contracted state is expanded to form a cavity in the bone.

However, the conventional expandable structure 5 is formed such that three radially-shaped wings are formed at right angles with respect to the direction in which the holes formed in the body and the direction to be inserted. Accordingly, when the inflatable structure 5 is pushed along the hole, relatively large resistance is generated between the wing portion of the inflatable structure 5 and the hole, thereby preventing its insertion.

In addition, such a conventional expandable structure (5) when the expansion fluid is injected therein the inner peripheral surface should be expanded in the same shape, the three concave portion of the concave date form constricted inwards is expanded or less than the other parts as a whole as a whole It did not expand to the same shape, thus preventing the sponges around it from being compressed at the same pressure.

Another problem of this conventional bone compression device for posterior vertebral plastic surgery lies in the syringe 7 for injecting the expansion fluid into the expandable structure 5. The detachable lever 13 of the syringe 7 is rotated in a clockwise or counterclockwise direction, and the female screw portion is engaged with or separated from the male screw portion 11 of the piston rod 9. By the way, this detachable lever 13 is inconvenient to grip because the small gripping portion projecting outward should be operated while holding and holding with two fingers.

In addition, since the grip portion of the detachable lever 13 protrudes outward, the detachable lever 13 is often undesirably rotated while the protruding portion is caught by the operator's body part or part of the garment. When the detachable lever 13 is unnecessarily rotated and the engaged state is released, the finely adjusted piston rod 9 is moved inside the cylinder 8 so that the adjustment pressure of the finely adjusted piston rod 9 is changed. Is generated.

An object of the present invention for solving the above problems is to provide a bone compression device for posterior vertebral plastic surgery that allows the inflatable structure to be inserted smoothly into the body.

Another object of the present invention is to provide a bone compression device for posterior vertebral plastic surgery that allows the entire circumference of the expandable structure to be uniformly expanded.

Still another object of the present invention is to provide a bone compression device for posterior vertebral plastic surgery that allows the piston rod to be easily and stably controlled.

The bone compression device of the present invention for achieving the purpose of the present invention is composed of a material having elasticity to form a cavity in the bone while expanding when the expansion fluid is supplied, and the expansion fluid is not supplied. In the interior has a contracted form along the center of the wing-shaped contact portion is formed on the periphery, the contact portion is an expandable structure consisting of a spiral along the longitudinal direction; And a syringe connected to the expandable structure and injecting the expanded fluid thereto.

Another feature of the bone compression device for posterior vertebral plastic surgery is that the syringe is filled with an expansion fluid and has a first flange portion and a second flange portion formed at both ends thereof, and is coupled to one end of the cylinder and pumped therein. A piston which is injected with a fluid and connected to the expandable structure, a piston rod coupled to one end thereof with a male screw portion formed therein and a handle portion formed at the other end thereof so as to pump the expansion fluid inside the cylinder toward the nozzle side, and a through hole at the center thereof; A first operating space and a second operating space are formed in the center of the through hole, and a first involute curve shape is formed around the through hole at the bottom of the first operating space and the second operating space. A piston key guide having a guide hole and a second guide hole, and a first female thread portion and a second arm to be engaged with the male thread portion of the piston rod on an inner circumferential surface thereof; A first guide jaw and a second guide jaw are formed to be inserted into the first guide hole and the second guide hole on one surface thereof, and guided along the first guide hole, and the first coupling groove and the second coupling groove are formed on the other surface thereof. A first coupling protrusion and a second coupling protrusion are formed to be inserted into the piston key and the second piston key and the first coupling groove of the first piston key and the second coupling groove of the second piston key on one side of the flange, and the flange A key rotating body having a coupling shaft formed at the other side of the cylinder, a second flange portion of the cylinder, a piston key guide, a first housing and a second housing coupled around a flange of the key rotating body, and coupled to the coupling shaft of the key rotating body; The first piston key and the second piston key which rotates and interlock with the key rotating body are composed of a key adjusting knob which is collected on the male screw portion side of the piston rod or spreads to the outside of the male screw portion.

The present invention for achieving the above object is a bone compression device for back vertebral plastic surgery, the expansion fluid is filled with a cylinder having a first flange portion and a second flange portion at both ends; A nozzle coupled to one end of the cylinder to inject a pumping fluid therein and connected to the expandable structure; A piston rod coupled to one end thereof with a male screw portion formed therein and a handle portion formed at the other end thereof so as to pump the expansion fluid inside the cylinder to the nozzle side; A through hole is formed in the center, and a first operating space and a second operating space are formed in the center of the through hole, and an involute route curve is formed around the through hole at the bottom of the first and second operating spaces. A piston key guide having a first guide hole and a second guide hole having a shape; The first guide jaw and the second guide jaw are formed on the inner circumferential surface of the first female threaded portion and the second female threaded portion to be engaged with the male threaded portion of the piston rod, and are inserted into the first guide hole and the second guide hole on one surface thereof and guided along the same. A first piston key and a second piston key having a first coupling groove and a second coupling groove formed on the other surface thereof; A key rotating body having a first coupling protrusion and a second coupling protrusion formed on one side of the flange to be inserted into the first coupling groove of the first piston key and the second coupling groove of the second piston key, and the coupling shaft being formed on the other side of the flange. ; A first housing and a second housing coupled to a flange of the second flange portion, the piston key guide and the key rotating body of the cylinder; A key adjusting knob which is coupled to the coupling shaft of the key rotating body to rotate the first piston key and the second piston key which interlock with the key rotating body and to the male thread part side of the piston rod or spreads the outer side of the male thread part; A tube whose one end is connected to the nozzle; An adapter connected to the other end of the tube; A tube assembly having one end connected to the adapter and supplied with an expansion fluid; And an expandable structure installed at the other end of the tube assembly and expanding when the expansion fluid is supplied to form a cavity in the bone.

Another feature of the bone compression device for posterior vertebral plastic surgery is that the expandable structure has a form in which the inside is shrunk along its center when the expansion fluid is not supplied, so that the wing-shaped contact portions are formed around the The close contact portions are formed spirally along their length direction.

The present invention as described above is made of a spiral so that a plurality of closely contact portions formed radially on the expandable structure is inserted into the hole formed in the body. Therefore, when the expandable structure is inserted while rotating along the spiral direction when the expandable structure is pushed into the hole of the body, the close contact parts are smoothly inserted into the hole while the frictional resistance between the close contact parts and the hole is minimized.

In addition, the expandable structure of the present invention, since a plurality of close contact portion is formed in a spiral, when the expansion fluid is injected into the inside, the hydraulic pressure acts along the helical direction of the close contact portion relatively relatively to the inner peripheral surface of the expandable structure. Therefore, since the hydraulic pressure of the expansion fluid is spread evenly along the spiral direction of the close contact portions, the expandable structure is expanded relatively uniformly, thereby compressing the sponges around the same pressure at the same pressure.

In the syringe of the present invention, when the key adjustment knob is gripped and rotated clockwise or counterclockwise, the pair of first piston keys and the second piston keys are tightened or opened toward the piston rod side, and the first female screw of the first piston keys. The second female screw portion of the portion and the second piston key are engaged with or separated from the male screw portion of the piston rod. Since the entire key circumference of the present invention is exposed to the outside, the key adjusting knob can be rotated after holding anywhere in the circumference of the key adjusting knob. Therefore, the operator is very convenient because the piston rod is controlled while the first piston key and the second piston key are interlocked even after holding the unspecified position in the circumference of the key adjusting knob regardless of the position of the syringe.

In the syringe of the present invention, when the key adjustment knob is rotated, a pair of first piston keys and a second piston key are interlocked and simultaneously engaged or separated on both sides of the piston rod. Therefore, since both side portions of the piston rod are engaged by a pair of interlocked first and second piston keys, the engagement state is very solid and stable.

In addition, the key adjustment knob is cylindrical, there is no part protruding around it. Therefore, there is no fear that the operator's body part or clothing part will be caught on the circumferential side of the key adjusting knob, and therefore, there is no fear that the key adjusting knob may be undesirably rotated.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Figure 2 is an exploded perspective view showing the syringe portion of the posterior vertebral plastic surgery of the present invention, Figures 3a and 3b is a schematic perspective view and a side view showing the vertebral plastic surgery of the present invention. 4 is a cross-sectional view of the combination of Figure 2, Figure 5 is an exploded perspective view of the main parts for controlling the piston rod. 6A and 6B are schematic exploded perspective views showing a state in which a first piston key and a second piston key are engaged with a male threaded portion of a piston rod, and FIGS. 7A and 7B are cross-sectional views illustrating the first piston key and the second piston; Fig. 1 is a schematic extracting perspective view showing a state in which a piston key is separated from a male screw portion of a piston rod, and a sectional view of a combination thereof.

The bone compression device for posterior vertebral plastic surgery of the present invention includes a syringe 160, a tube 120, a y-type adapter 130, a tube assembly, and an expandable structure 150.

The syringe 160 is provided with a cylinder 20 in which an expansion fluid is filled and both ends of the first flange portion 21 and the second flange portion 22 are formed. The first flange portion 21 and the second flange portion 22 are formed at both ends of the cylinder 20, and the nozzle 30 is coupled to the first flange portion 21 of the cylinder 20. The nozzle flange 31 is formed at one end of the nozzle 30. The first nozzle key 32 and the second nozzle key 33 are coupled to the nozzle flange portion 31 and the first flange portion 21 of the cylinder 20, and the first nozzle key 32 and the second nozzle are combined. The nozzle key assembly cap 34 is coupled to the circumference of the key 33.

The piston rod 40 has a piston 43 coupled to one end thereof, a male screw portion 42 formed therein, and a handle portion 41 formed at the other end thereof so as to pump the expansion fluid to the nozzle 30 in the cylinder 20. Is provided.

A piston key guide 50 is provided on the side of the second flange portion 22 of the cylinder 20, and the first piston key 60 and the second piston key 70 interlock with each other in the piston key guide 50. It is installed as possible.

The piston key guide 50 has a first flange groove 93, a second flange groove 94, and a third flange groove 103 of the second housing 100 of the first housing 90 to be described later. The first fixing protrusion 51 and the second fixing protrusion 52 protrude so as to be seated in and supported by the fourth flange groove 104. A through hole 53 is formed in the center of the piston key guide 50, and a first operating space 54 and a second operating space 55 are formed around the through hole 53. The first guide hole 56 and the second guide hole 57 in the form of an involute curve are formed at the bottom of the first operating space 54 and the second operating space 55 around the through hole 53. .

The first piston key 60 and the second piston key 70 are formed on the inner circumferential surface of the first female thread portion 61 and the second female thread portion 71 so as to be engaged with the male thread portion 42 of the piston rod 40. The first guide jaw 62 and the second guide jaw 72 are formed to be inserted into the first guide hole 56 and the second guide hole 57 on one surface thereof and guided along the same. A first coupling groove 63 and a second coupling groove 73 are formed to couple the first coupling protrusion 82 and the second coupling protrusion 83 of the key rotating body 80.

The first rotary member 80 is coupled to the first coupling groove to be inserted into the first coupling groove 63 of the first piston key 60 and the second coupling groove 73 of the second piston key 70 on one side of the flange 81. A projection 82 and a second coupling protrusion 83 are formed, and a coupling shaft 84 having a square pillar shape is formed at the other side of the flange 81.

The first housing 90 and the second housing 100 are coupled around the second flange portion 22 of the cylinder 20, the piston key guide 50, and the flange 81 of the key rotating body 80. Combined. The first housing 90 and the second housing 100, the first housing 91 and the second housing 101 is formed so that the piston key guide 50 is seated, the first housing ( 91 and the upper and lower ends of the second housing 101, the first step 92 and the second step 102 so that the first fixed protrusion 51 and the second fixed protrusion 52 of the piston key guide 50 is seated. ) Is formed. The first flange groove 93 and the second flange groove 94 are mounted on both sides of the piston key guide 50 so that the second flange portion 22 of the cylinder 20 and the flange 81 of the key rotating body 80 are seated. And a third flange groove 103 and a fourth flange groove 104.

Both ends of the first housing 90 and the second housing 100 are fitted with a first assembly ring 105 and a second assembly ring 106 to couple them.

The key adjusting knob 110 is coupled to the coupling shaft 84 of the key rotating body 80. The key adjustment knob 110 has a square coupling hole 111 is formed in the center to be inserted into the coupling shaft 84 of the square pillar shape, the screw hole 112 is formed in the circumference. Accordingly, when the fixing screw 113 is fastened to the screw hole 112, the end of the fixing screw 113 is pressed onto the plane of the coupling shaft 84, and the key adjustment knob 110 is fixed to the coupling shaft 84.

One end of the tube 120 is connected to the nozzle 30 of the syringe 160, and the y-type adapter 130 is connected to the other end of the tube 120. The tube assembly 140 is connected to the adapter 130. Although not shown, the tube assembly 140 includes an outer tube, an inner tube provided inside the outer tube, and an iron core provided inside the inner tube. Therefore, when the expansion fluid is pumped from the syringe 160, the pumping fluid is guided through the passage between the outer tube and the inner tube is supplied to the expandable structure 150 side.

The expandable structure 150 is made of a material having elasticity to form a cavity in the bone while expanding when the expansion fluid is supplied. In the state in which the expansion fluid is not supplied, the inside has a contracted shape along the center thereof, and thus contact parts 151 having a wing shape are formed around the inside. The close contact portions 151 are characterized in that the spiral is formed along the longitudinal direction.

The bone compression device of the present invention in this configuration has a spiral shape so that the plurality of contact portions 151 radially formed on the expandable structure 150 are inserted smoothly into the holes formed in the body.

Accordingly, when the inflatable structure 150 is inserted while rotating along the spiral direction when the inflatable structure 150 is pushed into the hole of the body, the close contact portions 151 and the close contact portions 151 are smoothly inserted into the holes while minimizing the frictional resistance around the holes. do.

In addition, the expandable structure 150 of the present invention, since the plurality of close contact portion 151 is formed in a spiral form when the expansion fluid is injected into the expandable structure while the hydraulic pressure acts along the spiral direction of the close contact portion (151) The inner circumferential surface of 150 acts relatively evenly. Therefore, since the hydraulic pressure of the expansion fluid acts evenly along the spiral directions of the close parts 151, the expandable structure 150 is expanded relatively uniformly, thereby compressing the sponges around the same pressure at the same pressure.

In another embodiment of the present invention, the syringe 160 is rotated in the direction of the arrow A as shown in FIGS. 6A and 6B after holding the key adjusting knob 110 to rotate the key rotating body 80. When the key rotating body 80 is rotated, the first piston key 60 and the second piston key 70 are rotated by the first coupling protrusion 82 and the second coupling protrusion 83. Here, the first piston key 60 and the second piston key 70, the first guide jaw 62 of the first piston key 60 and the second guide jaw 72 of the second piston key 70 is Guided along the first guide hole 56 and the second guide hole 57 of the piston key guide 50 is tightened to the through hole 53 side of the piston key guide 50, and eventually the first piston key 60 The first female screw portion 61 and the second female screw portion 71 of the second piston key 70 are engaged with the male screw portion 42 of the piston rod 40.

After holding the key adjustment knob 110 and rotating in the direction of the arrow (B) as shown in Figs. 7a and 7b, the key rotating body 80 is rotated. When the key rotating body 80 is rotated, the first piston key 60 and the second piston key 70 are rotated by the first coupling protrusion 82 and the second coupling protrusion 83. In the first piston key 60 and the second piston key 70, the first guide jaw 62 of the first piston key 60 and the second guide jaw 72 of the second piston key 70 are pistons. While being guided along the first guide hole 56 and the second guide hole 57 of the key guide 50, they are gradually moved away from the through-hole 53 of the piston key guide 50, resulting in the first piston key ( The first female thread portion 61 of the 60 and the second female thread portion 71 of the second piston key 70 are separated from the male thread portion 42 of the piston rod 40.

As such, when the key adjustment knob 110 is rotated clockwise (A) or counterclockwise (B), the pair of first piston keys 60 and the second piston keys 70 are tightened toward the piston rod 40. The first female threaded portion 61 of the first piston key 60 and the second female threaded portion 71 of the second piston key 70 are engaged with or separated from the male threaded portion 42 of the piston rod 40 while being formed or opened. do.

The key adjustment knob 110 of the present invention can be rotated after holding anywhere in the circumference of the key adjustment knob 110 because the entire circumference of the key adjustment knob 110 is exposed to the outside. Therefore, the operator may hold the piston rod (1) while the first piston key 60 and the second piston key 70 are interlocked even when the syringe rotates after holding an unspecified position among the circumferences of the key adjusting knob 110 regardless of the position of the syringe 160. 40) is controlled so its work is very convenient.

Syringe 160 of the bone compression device for posterior vertebral plastic surgery of the present invention, when the key adjustment knob 110 is rotated to form a pair of first piston key 60 and the second piston key 70 interlocked piston Both sides of the rod 40 are simultaneously engaged or separated. Therefore, since both sides of the piston rod 40 are engaged by a pair of interlocked first piston keys 60 and second piston keys 70, the engagement state is very solid and stable.

And, the key adjustment knob 110 is a cylindrical shape. Therefore, there is no separate protrusion around it. Therefore, there is no fear that the operator's body part or clothing part may be caught on one side of the circumference of the key adjustment knob 110, and thus the key adjustment knob 110 is not rotated undesirably.

1 is a schematic perspective view showing a conventional bone compression device for posterior vertebral plastic surgery

Figure 2 is an exploded perspective view showing a syringe portion of the bone compression device for back vertebral plastic surgery of the present invention

Figure 3a and Figure 3b is a schematic perspective view and a side view showing a bone compression device for posterior vertebral plastic surgery of the present invention

4 is a cross sectional view of FIG. 2.

Figure 5 is an exploded perspective view of the main parts for controlling the piston rod

6A and 6B are schematic exploded perspective views showing a state in which a first piston key and a second piston key are engaged with a male threaded portion of a piston rod, and a cross-sectional view of a combination thereof;

7A and 7B are schematic exploded perspective views showing a state in which a first piston key and a second piston key are separated from a male threaded portion of a piston rod, and a cross-sectional view of the combination thereof;

* Description of the symbols for the main parts of the drawings *

20: cylinder 21: first flange portion

22: second flange portion 30: nozzle

31: nozzle flange portion 32: the first nozzle key

33: second nozzle key 34: nozzle key assembly cap

40: piston rod 41: handle portion

42: male thread 43: piston

50: piston key guide 51: first fixing protrusion

52: second fixing protrusion 53: through hole

54: first operating space 55: second operating space

56: first guide hole 57: second guide hole

60: first piston key 61: first female thread

62: first guide jaw 63: first coupling groove

70: second piston key 71: second female thread

72: second guide jaw 73: second coupling groove

80: key rotating body 81: flange

82: first binding protrusion 83: second binding protrusion

84: coupling shaft 90: first housing

91: first storage unit 92: first step

93: first flange groove 94: second flange groove

100: second housing 101: second storage

102: second step 103: third flange groove

104: fourth flange groove 105: the first assembly ring

106: second assembly ring 110: key adjustment knob

111: coupling hole 112: screw hole

113: fixing screw 120: tube

130: adapter 140: tube assembly

150: expandable structure 151: close contact

160: Syringe

Claims (4)

When the expansion fluid is supplied, it is made of a material having elasticity to form a cavity in the bone while expanding, and in the state in which the expansion fluid is not supplied, the inside has a contracted shape along its center and has a wing-shaped contact portion around the periphery. 151 are formed, the close contact portion 151 is an expandable structure 150 formed in a spiral along the longitudinal direction; And a syringe (160) connected to the expandable structure (150) and injecting the expandable fluid thereto. The method of claim 1, wherein the syringe 160, A cylinder 20 filled with an expansion fluid and having first and second flange portions 21 and 22 formed at both ends thereof; A nozzle 30 coupled to one end of the cylinder 20 to inject a pumping fluid therein and connected to the expandable structure 150; A piston rod 40 having a piston 43 coupled to one end and a male screw portion 42 formed thereon and a handle portion 41 formed at the other end to pump the expansion fluid inside the cylinder 20 toward the nozzle 30. )Wow, A through hole 53 is formed in the center, and a first operating space 54 and a second operating space 55 are formed around the through hole 53 therein, and the first operating space 54 and the second are formed. A piston key guide (50) having a first guide hole (56) and a second guide hole (57) in the form of an involute curve at the bottom of the working space (55), A first female threaded portion 61 and a second female threaded portion 71 are formed on an inner circumferential surface of the piston rod 40 so as to be engaged with the male threaded portion 42. The first guide hole 56 and the second guide hole are formed on one surface thereof. The first piston having the first guide jaw 62 and the second guide jaw 72 is formed to be inserted into the guide 57 and guided along the first guide jaw, and the first piston having the first coupling groove 63 and the second coupling groove 73 formed on the other surface thereof. The key 60 and the second piston key 70, A first coupling protrusion 82 to be inserted into a first coupling groove 63 of the first piston key 60 and a second coupling groove 73 of the second piston key 70 on one side of the flange 81; A key rotating body 80 having a second coupling protrusion 83 formed thereon and a coupling shaft 84 formed at the other side of the flange 81; A first housing 90 and a second housing 100 coupled around a flange 81 of the second flange portion 22, the piston key guide 50, and the key rotating body 80 of the cylinder 20; The piston rod 40 is coupled to the coupling shaft 84 of the key rotating body 80 to rotate the first piston key 60 and the second piston key 70 in cooperation with the key rotating body 80. Skeleton compression device for back vertebral plastic surgery, characterized in that consisting of the key adjustment knob (110) is collected toward the male screw portion (42) side of the male screw portion (42). A cylinder 20 filled with an expansion fluid and having first and second flange portions 21 and 22 formed at both ends thereof; A nozzle 30 coupled to one end of the cylinder 20 to inject a pumping fluid therein and connected to the expandable structure 150; A piston rod 40 having a piston 43 coupled to one end and a male screw portion 42 formed thereon and a handle portion 41 formed at the other end to pump the expansion fluid inside the cylinder 20 toward the nozzle 30. ); A through hole 53 is formed in the center, and a first operating space 54 and a second operating space 55 are formed around the through hole 53 therein, and the first operating space 54 and the second are formed. A piston key guide (50) having a first guide hole (56) and a second guide hole (57) formed in an involute curve around the through hole (53) at the bottom of the working space (55); A first female threaded portion 61 and a second female threaded portion 71 are formed on an inner circumferential surface of the piston rod 40 so as to be engaged with the male threaded portion 42. The first guide hole 56 and the second guide hole are formed on one surface thereof. The first piston having the first guide jaw 62 and the second guide jaw 72 is formed to be inserted into the guide 57 and guided along the first guide jaw, and the first piston having the first coupling groove 63 and the second coupling groove 73 formed on the other surface thereof. Key 60 and second piston key 70; A first coupling protrusion 82 to be inserted into a first coupling groove 63 of the first piston key 60 and a second coupling groove 73 of the second piston key 70 on one side of the flange 81; A key rotating body (80) having a second coupling protrusion (83) formed and a coupling shaft (84) formed at the other side of the flange (81); A first housing (90) and a second housing (100) coupled around a flange (81) of the second flange portion (22), the piston key guide (50), and the key rotating body (80) of the cylinder (20); The piston rod 40 has the first piston key 60 and the second piston key 70 coupled to the coupling shaft 84 of the key rotating body 80 to rotate it and interlock with the key rotating body 80. The key adjustment knob 110 is collected toward the male screw portion 42 side or open to the outside of the male screw portion 42; A tube 120 having one end connected to the nozzle 30; An adapter 130 connected to the other end of the tube 120; A tube assembly 140 having one end connected to the adapter 130 and supplied with an expansion fluid; And an expandable structure (150) installed at the other end of the tube assembly (140) and expanding when the expansion fluid is supplied to form a cavity in the bone. The method of claim 3, wherein the expandable structure 150, When the expansion fluid is not supplied, the inside has a shape contracted along its center to form a wing-shaped contact portion 151 around the circumference, the contact portion 151 is characterized in that the spiral formed along the longitudinal direction Bone compression device for postmenopausal plastic surgery.

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