WO2014126389A1

WO2014126389A1 - Bone distractor

Info

Publication number: WO2014126389A1
Application number: PCT/KR2014/001164
Authority: WO
Inventors: 장동혁
Original assignee: 주식회사 제일메디칼코퍼레이션
Priority date: 2013-02-12
Filing date: 2014-02-12
Publication date: 2014-08-21
Also published as: KR101391404B9; KR101391404B1

Abstract

The present invention discloses a bone distractor for adjusting the relative position and turning angle of two bone segments when performing distraction osteogenesis. The present invention comprises a lead screw, a support block, a fixing block, a traveling block, a pair of guide bars, a first bone plate, and a second bone plate. The support block and the fixing block are respectively connected to both ends of the lead screw. The traveling block is fastened to the lead screw so as to be screwed about the lead screw between the support block and the fixing block. The traveling block has one side extended with a joint plate. The guide bars are inserted in the guide holes of the traveling block to convert the screwing motion of the traveling block into a linear motion. The first bone plate is detachably attached to the joint plate of the fixing block. The second bone plate is detachably attached to the joint block of the traveling block. According to the present invention, the first and the second bone plate are formed as a separation type, so that the operation of cutting bones can be readily and accurately performed with the first and the second bone plate remaining in an operational region. In addition, the relative position and turning angle of two bone segments can be readily and accurately adjusted so as to improve the accuracy and efficiency of performing distraction osteogenesis.

Description

Bone Kidney

The present invention relates to a bone kidney, and more particularly to a bone kidney for controlling the relative position and rotation angle of the two bone fragments during the procedure of distraction osteogenesis.

Osteotomy is a surgical method that increases the length of bone through the gradual extension of the healing callus that occurs in the epiphysis at the time of fracture. Forms tissues of the ligaments, cartilage, blood vessels and nerves. Bone renal surgery is more effective in gradual treatment effect than bone cutting, and it is more accurate after the procedure. Because it is elongated with soft tissue, it has advantages in stability and prevention of regression. Recently, bone reconstruction has been actively adopted for the correction of facial bone malformations, such as bilateral sagittal split ramus osteotomy.

On the other hand, the bone stretch used for bone reconstruction is a bone fragment that passes through the skin along with a mechanism (mechanism) across the fracture site to gradually adjust the distance and rotation angle of the other bone relative to one bone on both sides of the fracture. It includes a pin (Pin) or bone screw (Bone screw) fixed to.

Korean Patent Laid-Open Publication No. 10-2007-0046121 The bone stretcher includes a connection mechanism for operatively connecting a first bone plate, a second bone plate, and first and second bone plates. The second bone plate may be moved relative to the first bone plate by the rotation of an activation screw. The first housing member is engaged with the first bone plate, and the second housing member receives the actuation screw. The first housing member and the second housing member are coupled to be rotatable.

US Pat. No. 7,771,434 Bone distractor apparatus includes a distal bone plate and a proximal bone plate secured to two bone pieces by a plurality of bone screws. The distal and proximal bone plates are connected by a housing.

In the above-described procedure using the bone extension device, the first and second bone plates are fixed to the mandible (mandible) by fastening the bone screws to determine the relative position, and then loosen the bone screws. Carry out the fracture. When the fracture is completed, the first and second bone plates have a cumbersome and inconvenient problem of having to insert and fix the bone screws to the screw holes formed before the mandible. In addition, the process of fastening the bone screws by finding the previously formed screw holes in the structure of the mandible is causing a delay in the procedure time.

The present invention is to solve the various problems of the conventional bone kidney as described above. SUMMARY OF THE INVENTION An object of the present invention is to provide a new bone extension device in which the first and second bone plates are separated so that bone cutting can be easily and accurately performed while leaving the first and second bone plates at the patient's procedure site. .

Another object of the present invention is to provide a bone stretcher that can accurately and easily adjust the relative position and rotation angle of the two bone pieces during the operation of bone renal surgery.

According to one aspect of the invention, there is provided a bone kidney. The bone stretcher according to the present invention includes a lead screw having a first end and a second end; A support block coupled to the first end; A fixed block coupled to the second end and having a joint plate extending on one surface thereof; A traveling block fastened to the lead screw so as to spirally move along the lead screw between the support block and the fixed block, a pair of guide holes are formed, and a joint plate extending on one side thereof; A pair of guide bars fitted in the pair of guide holes to guide the spiral motion of the traveling block in a linear motion; A first bone plate coupled to the joint plate of the fixed block and coupled to the bone piece; It is coupled so as to be separated from the joint plate of the traveling block, and includes a second bone plate coupled to the bone piece.

In addition, each of the first bone plate and the second bone plate is coupled to the joint plate of the fixed block and the joint plate of the traveling block by the fastening of the screw, and the rod that the operator can rotate on the first end of the lead screw It is connected by a universal joint.

Bone extension device according to the present invention, the first and second bone plate is configured to be separated can be easily and accurately performed bone cutting while leaving the first and second bone plate in the treatment site of the patient. In addition, it is possible to accurately and easily adjust the relative position and rotation angle of the two bone fragments during the operation of bone renal surgery to improve the accuracy and efficiency of bone renal surgery.

1 is a perspective view showing the configuration of a bone kidney according to the present invention.

Figure 2 is a perspective view showing the separation of the first and second bone plate in the bone expander according to the present invention.

Figure 3 is a perspective view separately showing the configuration of the universal joint in the bone expander according to the present invention.

Figure 4 is a front view showing to explain the operation of the bone kidney according to the present invention.

5 to 7 are views showing to explain the procedure of the bone kidney according to the present invention.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings.

Hereinafter, preferred embodiments of the bone stretching device according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIGS. 1 to 4, the bone expander 10 according to the present invention includes a lead screw 20, a support block 30, a fixed block 40, and a traveling. A traveling block 50 and a pair of guide bars 60 are provided.

The lead screw 20 has a first end 22 and a second end 24. A stopper 26 is formed on the outer surface of the first end 22. The support block 30 is coupled to the first end 22 of the lead screw 20. The screw hole 32 is formed in the center of the support block 30. The lead screw 20 is fastened so as to rotate in the screw hole 32. The second end 24 is fastened to pass through the screw hole 32. The stopper 26 is supported on one surface of the support block 30 to constrain the position of the lead screw 20. A pair of holes 34 are formed at both sides of the support block 30 based on the screw holes 32.

The fixed block 40 is coupled to the second end 24 of the lead screw 20. The hole 42 is formed in the center of the fixed block 40. The lead screw 20 is fastened so that it may rotate in the hole 42. A pair of holes 44 are formed on both sides of the fixing block 40 with respect to the holes 42 so as to be aligned with the holes 34. A joint plate 46 extends on one side of the fixed block 40. A screw hole 48 is formed at the tip end of the joint plate 46.

The traveling block 50 is coupled to the lead screw 20 to move between the support block 30 and the fixed block 40. The screw hole 52 is formed in the center of the traveling block 50. The lead screw 20 is fastened so that it may rotate in the screw hole 52. When the lead screw 20 is rotated, the traveling block 50 moves between the support block 30 and the fixed block 40 while screwing along the lead screw 20. A pair of holes 54 are formed on both sides of the support block 30 with respect to the screw holes 52 so as to be aligned with the holes 34. The joint plate 56 extends on one side of the traveling block 50. A screw hole 58 is formed in the tip end of the joint plate 56. In another embodiment, a ball bush and a nut that are spirally moved along the lead screw 20 by the rotation of the lead screw 20 may be mounted.

The pair of guide bars 60 guide the helical motion of the traveling block 50 in a linear motion. The guide bars 60 are fitted to pass through the holes 54 of the traveling block 50. Both ends of the guide bars 60 are fixed to the holes 32 of the support block 30 and the holes 42 of the fixing block 40. In another embodiment, a guide bush may be mounted to each of the holes 54 so that the linear movement of the traveling block 50 is smooth.

The bone stretcher 10 according to the present invention is the first bone plate 70 is coupled to be separated from each of the joint plate 46 of the fixed block 40 and the joint plate 56 of the traveling block 50. And a second goal plate 80. The second goal plate 80 is moved relative to the first goal plate 70 to adjust the distance from the first goal plate 70.

Bolt holes 72 and 82 are formed in the upper center of each of the first and

second goal plates

70 and 80 so as to be aligned with the screw holes 48 and 58. The screw 90 is fastened to the screw holes 48 and 58 of the

joint plates

46 and 56 through the bolt holes 72 and 82, and the first and second bone plates 70 are fastened by the screw 90 to the screw hole. 80 is fixed to the

joint plates

46 and 56, respectively. A plurality of bolt holes 74 and 84 are formed at both lower sides of each of the first and

second goal plates

70 and 80 for fastening the plurality of goal screws 92. In this embodiment, two

bolt holes

74 and 84 are shown, but the number and position of the bolt holes 74 and 84 may be appropriately changed as necessary.

The bone expander 10 according to the present invention has a universal joint 100 coupled to the first end 22 of the lead screw 20. The universal joint 100 is a cross shaft 106 connected to the first joint yoke 102, the second joint yoke 104, and the first and second

joint yokes

102 and 104. Consists of.

As clearly shown in FIG. 3, the cross axis 106 is composed of a block 106a, a first pivot 106b, a second pivot 106c and a third pivot 106d. The block 106a of the cross shaft 106 is disposed between the first and second

joint yokes

102 and 104.

The first pivot 106b couples the first joint yoke 102 and the block 106a to allow rotation of the first joint yoke 102. The second and

third pivots

106c and 106d engage the second joint yoke 104 and the block 106a to allow rotation of the second joint yoke 104. First and

second bushes

110 and 112 are fitted to the outer surfaces of the first and second

joint yokes

102 and 104, respectively.

Referring again to FIGS. 1, 2 and 4, the first joint yoke 102 is coupled to the first end 22 of the lead screw 20. The rear end of the rod 120 is coupled to the first joint yoke 102. At the tip of the rod 120, a hexagonal head 122 is formed which the operator can rotate by a tool, for example, a hexagon box spanner. In another embodiment, an extension rod for extending the length may be coupled to the tip of the rod 120. In this case, the extension rod is fastened to the hexagonal head 122, and the hexagonal head is formed at the tip of the extension rod.

Now, the action on the bone kidney according to the present invention having such a configuration will be described.

1 and 5, each of the first and

second goal plates

70 and 80 is fixed to the

joint plates

46 and 56 by fastening the screws 90. The operator adjusts the relative position of the second goal plate 80 with respect to the first goal plate 70. The operator fastens the bone screws 92 to the maxilla 2 or the mandible 4 through the bolt holes 74 and 84 of the first and

second bone plates

70 and 80, for example. And

second goal plates

70 and 80.

Referring to FIG. 6, when the first and

second bone plates

70 and 80 are fixed to the maxilla 2 and the mandible 4, the operator loosens the screw 90 and the first and second bone plates 70. , 80) Separate the

joint plates

46 and 58 from each other. In addition, only the first and

second bone plates

70 and 80 that are fastened by the bone screws 92 are left in the maxilla 2 and the mandible 4 of the patient. The operator cuts the mandible 4 between the first and

second bone plates

70 and 80, and the surgical instrument 10 is cut by a surgical instrument such as an osteotomy to form an osteotomy line 6. do.

Referring to FIG. 7, after cutting the fracture line 6, the operator fastens the screw 90 to the screw hole 48 of the joint plate 46 through the bolt hole 72 of the first bone plate 70. The joint plate 46 and the first goal plate 70 are fixed. In addition, the operator may fasten the screw 90 to the screw hole 58 of the joint plate 56 through the bolt hole 82 of the second bone plate 80 to joint plate 56 and the second bone plate 80. ).

As described above, the bone stretcher 10 according to the present invention can be easily and accurately treated in the state in which the first and

second bone plates

70 and 80 are fixed to the treatment site by fastening the bone screws 92. Can be. In particular, since the fixing work of the first and

second bone plates

70 and 80 by the fastening of the bone screws 92 ends in one step, the procedure time can be shortened.

Referring to FIG. 4, when the operator rotates the hexagonal head 122 of the rod 120 by the hexagonal box spanner, the universal joint 100 and the lead screw 20 rotate together with the rod 120. As shown by the arrow "A" in Figure 4, the universal joint 100 is a declination, eccentricity and lead screw generated between the center axis of the rod 120 and the center axis of the lead screw 20 by the joint motion Allow 20 to flow.

Subsequently, when the lead screw 20 is rotated, the screw hole 52 of the traveling block 50 spirals along the lead screw 90, as shown by the arrow " B " It is moved along the longitudinal direction of the screw 90. At this time, the guide holes 54 are linearly moved while sliding along the guide bars 60. The second goal plate 80 is moved relative to the first goal plate 70 by the movement of the traveling block 50, and the relative positions and rotation angles of the first and

second goal plates

70 and 80 are adjusted. do. Therefore, the bone expander 10 according to the present invention can accurately and simply adjust the relative positions and rotation angles of the first and

second bone plates

70 and 80, and can be used on various bone surfaces.

The embodiments described above are merely illustrative of the preferred embodiments of the present invention, the scope of the present invention is not limited to the described embodiments, those skilled in the art within the spirit and claims of the present invention Various changes, modifications, or substitutions may be made by the present invention, and such embodiments should be understood as falling within the scope of the present invention.

Claims

A lead screw having a first end and a second end;

A support block coupled to the first end;

A fixed block coupled to the second end and having a joint plate extending on one surface thereof;

A traveling block fastened to the lead screw so as to spirally move along the lead screw between the support block and the fixed block, a pair of guide holes are formed, and a joint plate extending on one side thereof;

A pair of guide bars fitted in the pair of guide holes to guide the spiral motion of the traveling block in a linear motion;

A first bone plate coupled to the joint plate of the fixed block and coupled to the bone piece;

The bone stretcher is coupled to the joint plate of the traveling block to be separated, comprising a second bone plate coupled to the bone piece.
The method of claim 1,

And each of the first bone plate and the second bone plate is coupled to a joint plate of the fixed block and a joint plate of the traveling block by fastening screws.
The method according to claim 1 or 2,

And a rod that can be rotated by an operator to the first end of the lead screw by a universal joint.