A distraction bone grafting device

Abstract

The present invention discloses a distraction bone grafting device, which relates to the technical field of medical devices. The distraction bone grafting device is used to distract and graft two broken bones, and includes a fixed support portion, a movable support portion, a connecting structure, and a bone grafting portion. The fixed support portion can be fixed on one of the broken bones; the movable support portion can be fixed on the other broken bone; the connecting structure connects the fixed support portion and the movable support portion, and the movable support portion can move relative to the connecting structure, thereby approaching or moving away from the fixed support portion; the bone grafting portion is arranged on the connecting structure and can move along the length direction of the bone. The distraction bone grafting device of the present invention simplifies surgical instruments, facilitates operation, and is conducive to improving surgical efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a distraction bone grafting device. Background Art

[0002] Currently, trauma surgery often involves comminuted fractures and nonunions of the long bones of the patient's limbs. In these cases, not only does anatomical reduction of the bones require, but also a certain amount of bone grafting to complement the treatment.

[0003] In the prior art, in order to achieve both reduction and bone grafting treatments, different medical instruments need to be used to perform the relevant operations. For example, during reduction, a medical instrument is needed to spread the two broken bones apart, that is, a separate spreading device is used. When the bones are spread to the desired position, that is, the spread state is maintained unchanged by the spreading device, and then a bone grafting tool is selected to perform the bone grafting. It can be seen that during the operation, the spreading device and the bone grafting tool need to be used separately, and each of the above surgical tools requires a fixed structure for fixation. This will result in the complicated structure of the instruments used during the operation and the cumbersome operation, which in turn leads to a prolonged operation time. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, a distraction bone grafting device is proposed to simplify the medical instruments used during the operation and improve the efficiency of the operation.

[0005] The present invention provides a distraction bone grafting device for distracting and then grafting two broken bones, comprising:

[0006] a fixation support that can be fixed to one of the broken bones;

[0007] a mobile support that can be fixed to another broken bone;

[0008] a connecting structure connecting the fixed support portion and the movable support portion, wherein the movable support portion is movable relative to the connecting structure so as to move closer to or away from the fixed support portion;

[0009] The bone grafting part is arranged on the connecting structure and can move along the length direction of the bone.

[0010] As a preferred solution of the above-mentioned distraction bone grafting device, the connection structure includes a first guide portion and a second guide portion parallel to each other, and both sides of the movable support portion are movably connected to the first guide portion and the second guide portion respectively.

[0011] As a preferred solution of the above-mentioned distraction bone grafting device, the first guide portion includes a guide body, one end of the guide body is fixedly connected to the fixed support portion, and the other end is slidably engaged with the movable support portion.

[0012] As a preferred solution of the above-mentioned distraction bone grafting device, the guide body is provided with a sliding hole opened at the other end thereof, and the movable support portion includes a sliding rod, which can slide in the sliding hole.

[0013] As a preferred solution of the above-mentioned distraction bone grafting device, a locking screw is further provided on the guide body. The locking screw is passed through a side wall of the sliding hole and is threadedly connected to the side wall. The locking screw can abut against the sliding rod.

[0014] As a preferred solution of the above-mentioned distraction bone grafting device, the bone grafting portion is slidably provided on the side wall of the guide body.

[0015] As a preferred solution of the above-mentioned distraction bone grafting device, a slide groove is provided on the side wall of the guide body, the bone grafting part includes a bone grafting sleeve and a slider, the bone grafting sleeve is fixedly connected to the slider, and the slide groove is slidably connected to the slider.

[0016] As a preferred solution of the above-mentioned distraction bone grafting device, the second guide portion includes a threaded rod parallel to the guide body, and the movable support portion includes a nut portion threadedly connected to the threaded rod.

[0017] As a preferred solution of the above-mentioned distraction bone grafting device, the fixed support part includes a first connecting rod, the first connecting rod connects the first guide part and the second guide part, and a first guide needle sleeve is further provided on the first connecting rod, and a first guide needle is inserted into the first guide needle sleeve.

[0018] As a preferred solution of the above-mentioned distraction bone grafting device, the movable support part includes a second connecting rod, the second connecting rod connects the sliding rod and the second guide part, the second connecting rod is provided with a second guide needle sleeve, and the second guide needle sleeve is provided with a second guide needle.

[0019] The distraction bone grafting device of the present invention includes a fixed support portion and a movable support portion, which can be relatively close to or away from each other, thereby being able to adjust the distance between broken bones. In addition, a bone grafting portion is also provided on the connecting structure of the device, which can perform bone grafting between broken bones. The distraction device and the bone grafting device during surgery can share a set of devices, which simplifies surgical instruments, facilitates operation, and helps improve surgical efficiency.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The detailed description of the non-limiting embodiments with reference to the following drawings will more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art. The following will briefly introduce the drawings required for the specific embodiments or the description of the prior art, so that other features, objects, and advantages of the present invention will become more apparent. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0022] Figure 1 A schematic structural diagram of a distraction bone grafting device provided in an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a guide body in a distraction bone grafting device provided by an embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of the second guide portion in the distraction bone grafting device provided by an embodiment of the present invention.

[0025] In the figure: 1, fixed support portion; 11, first connecting rod; 12, first guide needle sleeve; 13, first guide needle; 14, sliding sleeve;

[0026] 2. Movable support portion; 21. Second connecting rod; 22. Sliding rod; 23. Nut portion; 24. Second guide needle sleeve; 25. Second guide needle;

[0027] 3. Connecting structure; 31. Guide body; 311. Slide hole; 312. Slide groove;

[0028] 32. Locking screw; 33. Threaded rod; 34. Connecting portion; 341. Smooth shaft section; 342. Threaded section; 35. Limit nut;

[0029] 4. Bone grafting portion; 41. Bone grafting sleeve; 42. Slider. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] Considering the complex structures and cumbersome operations of distraction and implantation instruments used in existing orthopedic surgeries, an embodiment of the present invention provides a distraction bone grafting device; this technology can be applied to orthopedic surgeries on long bones of the limbs, etc. The embodiments of the present invention are described in detail below.

[0032] Reference Figure 1 、 Figure 2 and Figure 3 A distraction bone grafting device proposed in an embodiment of the present invention will be described.

[0033] The distraction bone grafting device in this embodiment is used to distract and then graft two broken bones. The distraction bone grafting device includes a fixed support portion 1, a movable support portion 2, a connecting structure 3 and a bone grafting portion 4.

[0034] The fixed support portion 1 can be fixed to one of the broken bones. The movable support portion 2 can be fixed to the other broken bone. A connecting structure 3 connects the fixed support portion 1 and the movable support portion 2. The movable support portion 2 can move relative to the connecting structure 3, moving closer to or further away from the fixed support portion 1, thereby achieving the desired position of the two broken bones.

[0035] The bone grafting part 4 is used to graft bone between two broken bones. The bone grafting part 4 is arranged on the connecting structure 3 and can move along the length direction of the bone, so as to meet the requirements of bone grafting when fractures occur at different positions along the length direction of the bone.

[0036] In this embodiment, the connection structure 3 includes a first guide portion and a second guide portion that are parallel to each other, and both sides of the movable support portion 2 are movably connected to the first guide portion and the second guide portion respectively.

[0037] In this embodiment, the fixed support portion 1 includes a first connecting rod 11, which connects the first guide portion and the second guide portion. The first connecting rod 11 is also provided with a first guide needle sleeve 12. Specifically, the first guide needle sleeve 12 is arranged perpendicularly and crosswise with the first connecting rod 11. A first guide needle 13 is inserted into the first guide needle sleeve 12. The first guide needle 13 of the fixed support portion 1 is inserted into one of the broken bones to achieve a fixed connection with the broken bone.

[0038] The movable support portion 2 includes a second connecting rod 21, a sliding rod 22, and a nut portion 23. The second connecting rod 21 connects the sliding rod 22 and the nut portion 23. The sliding rod 22 slides with the first guide portion, and the nut portion 23 threads with the second guide portion. A second guide needle sleeve 24 is provided on the second connecting rod 21, and the second connecting rod 21 and the second guide needle sleeve 24 are arranged perpendicularly and crosswise. A second guide needle 25 is inserted into the second guide needle sleeve 24. The second guide needle 25 can be inserted into another broken bone, and according to the condition of the broken bone and the amount of bone grafting, the distance between the second guide needle 25 and the first guide needle 13 can be adjusted by adjusting the position of the second connecting rod 21 relative to the first connecting rod 11 to achieve the desired distance of spreading the broken bone.

[0039] In this embodiment, the first guide portion includes a guide body 31, and a locking screw 32 is provided on the guide body 31. One end of the guide body 31 is fixedly connected to the first connecting rod 11, and the other end is slidably engaged with the movable support part 2. Specifically, a sliding hole 311 is provided on the guide body 31, which is open at the other end thereof. The sliding rod 22 of the movable support part 2 extends into the sliding hole 311 through the opening of the sliding hole 311 and slidably engages with the guide body 31. The cross-sections of the sliding hole 311 and the sliding rod 22 are both rectangular, which can prevent the sliding rod 22 from rotating and ensure that the sliding rod 22 slides along the length direction. The length of the sliding rod 22 is greater than or equal to the depth of the sliding hole 311, which can make the distance adjustment range between the first guide needle 13 and the second guide needle 25 larger.

[0040] The locking screw 32 is passed through a side wall of the sliding hole 311 and is threadedly connected to the side wall. Specifically, the locking screw 32 is located at one end close to the movable support part 2. The locking screw 32 can be abutted against the sliding rod 22. When the distance between the first guide needle 13 and the second guide needle 25 reaches an appropriate position, the locking screw 32 can be rotated to make the locking screw 32 abut against the sliding rod 22, and the sliding rod 22 can be pressed against the side wall of the sliding hole 311, so that the sliding rod 22 cannot slide relative to the guide body 31, thereby achieving relative fixation of the first guide needle 13 and the second guide needle 25.

[0041] In this embodiment, the second guide portion includes a threaded rod 33 parallel to the guide body 31. The nut portion 23 of the movable support portion 2 is threadedly connected to the threaded rod 33. Rotating the threaded rod 33 allows the nut portion 23 to move along the axis of the threaded rod 33, causing the sliding rod 22 to slide relative to the guide body 31, thereby driving the second guide pin 25 to move. To enable movement of the nut portion 23 relative to the threaded rod 33, the first connecting rod 11 of the fixed support portion 1 is pivotally connected to the threaded rod 33. Specifically, the second guide portion also includes a cylindrical connecting portion 34, which is disposed at the end of the threaded rod 33 away from the movable support portion 2 and is coaxial with the threaded rod 33. This connecting portion 34 includes a smooth shaft segment 341 and a threaded segment 342. The smooth shaft segment 341 is directly connected to the threaded rod 33 at one end and connected to the threaded segment 342 at the other end. The diameter of the connecting portion 34 is smaller than the minor diameter of the threaded rod 33, thereby forming a step between the connecting portion 34 and the threaded rod 33. A sliding sleeve 14 is provided on the first connecting rod 11 of the fixed support part 1. The sliding sleeve 14 can be sleeved on the smooth shaft section 341, and the inner diameter of the sliding sleeve 14 is smaller than the minor diameter of the threaded rod 33. A limiting nut 35 is threaded on the threaded section 342. The limiting nut 35 and the step can limit the sliding sleeve 14 in the axial direction to ensure that the axial position of the fixed support part 1 relative to the second guide part remains unchanged.

[0042] A chute 312 is provided on the side wall of the guide body 31. The bone grafting portion 4 includes a bone grafting sleeve 41 and a slider 42. The bone grafting sleeve 41 is used to implant the bone grafting material into the bone fracture. The slider 42 is fixedly connected to the bone grafting sleeve 41. The chute 312 is slidably connected to the slider 42, so that the bone grafting sleeve 41 can move in the length direction of the guide body 31, which can facilitate surgery and has a wide range of applicability. Specifically, the chute 312 is provided on the side of the guide body 31 near the threaded rod 33. Specifically, the chute 312 is a dovetail groove, and the connection between the slider 42 and the chute 312 is also dovetail-shaped. A lateral opening is provided at one end of the chute 312 near the movable support portion 2 to facilitate the installation of the slider 42.

[0043] During surgery, the first guide needle 13 and the second guide needle 25 are respectively passed through the first guide needle sleeve 12 and the second guide needle sleeve 24 and fixed to the two broken bones. The threaded rod 33 is rotated to move the movable support part 2, and the first guide needle 13 and the second guide needle 25 are moved to the appropriate distance so that the two broken bones meet the surgical position requirements. The locking screw 32 locks the sliding rod 22 to the guide body 31, thereby fixing the position of the two broken bones. The slider 42 is moved to move the bone grafting sleeve 41 to the position where bone grafting is required, and the bone graft material is implanted between the broken bones.

[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A distraction bone grafting device for distracting and grafting two broken bones, characterized in that: include: A fixed support part (1) capable of being fixed on one of the broken bones; A movable support part (2) capable of being fixed to another broken bone; a connecting structure (3) connecting the fixed support portion (1) and the movable support portion (2), wherein the movable support portion (2) is movable relative to the connecting structure (3) so as to move closer to or farther away from the fixed support portion (1); a bone graft portion (4), which is arranged on the connecting structure (3) and is capable of moving along the length direction of the bone; The connecting structure (3) comprises a first guide portion and a second guide portion which are parallel to each other, and both sides of the movable support portion (2) are movably connected to the first guide portion and the second guide portion respectively; The first guide portion comprises a guide body (31), one end of the guide body (31) is fixedly connected to the fixed support portion (1), and the other end is slidably engaged with the movable support portion (2); The bone grafting portion (4) is slidably provided on the side wall of the guide body (31), and the bone grafting portion (4) includes a bone grafting sleeve (41); The guide body (31) is provided with a sliding hole (311) opened at the other end thereof, and the movable support portion (2) includes a sliding rod (22), and the sliding rod (22) is capable of sliding in the sliding hole (311); the cross-sections of the sliding hole (311) and the sliding rod (22) are both rectangular, and the length of the sliding rod (22) is greater than or equal to the depth of the sliding hole (311); A slide groove (312) is provided on the side wall of the guide body (31), the bone grafting portion (4) includes a slider (42), the bone grafting sleeve (41) is fixedly connected to the slider (42), and the slide groove (312) is slidably connected to the slider (42); the slide groove (312) is a dovetail groove, and the connection position between the slider (42) and the slide groove (312) is also dovetail-shaped.

2. The distraction bone grafting device according to claim 1, characterized in that: The guide body (31) is further provided with a locking screw (32), which is passed through a side wall of the sliding hole (311) and is threadedly connected to the side wall. The locking screw (32) can abut against the sliding rod (22).

3. The distraction bone grafting device according to claim 1, characterized in that: The second guide portion comprises a threaded rod (33) parallel to the guide body (31), and the movable support portion (2) comprises a nut portion (23) threadedly connected to the threaded rod (33).

4. The distraction bone grafting device according to claim 1, characterized in that: The fixed support portion (1) comprises a first connecting rod (11), the first connecting rod (11) connecting the first guide portion and the second guide portion, a first guide needle sleeve (12) further being provided on the first connecting rod (11), a first guide needle (13) being inserted into the first guide needle sleeve (12).

5. The distraction bone grafting device according to claim 1, characterized in that: The movable support portion (2) comprises a second connecting rod (21), the second connecting rod (21) connecting the sliding rod (22) and the second guide portion, a second guide needle sleeve (24) being provided on the second connecting rod (21), and a second guide needle (25) being inserted into the second guide needle sleeve (24).

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