Novel distraction forceps after intervertebral bone grafting

Abstract

The utility model relates to the technical field of spinal surgeries, in particular to a pair of novel distraction forceps after intervertebral bone grafting, and aims to solve the problem that an artificial bone material needs to be implanted when a doctor performs a spinal surgery. As an implantation channel is not arranged, the operation progress is influenced, and a patient with serious intervertebral space stenosis does not pay attention to whether the stress of the vertebral bodies is balanced or not in the process of opening the upper and lower vertebral bodies, the endplate is easily damaged. The dilator comprises a first dilation arm, a connecting steel piece, a fixing screw, a penetrating screw, a second dilation arm, a fastening screw, a locking elastic piece, a fixing elastic piece, a connecting screw, a ratchet piece and a ratchet clamping groove, the top end of the first dilation arm is of a flat structure, the first dilation arm can stretch into a narrow part, a gap is effectively dilated, and meanwhile the first dilation arm is not prone to falling off. The angle entering the vertebral body can be flexibly changed, the vertebral body is parallelly expanded, the stress of the vertebral body is ensured to be consistent when the vertebral body is expanded, the secondary injury in the operation process is avoided, and the problems that the stress of the vertebral body is unbalanced and the end plate is easily damaged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of spinal surgery, in particular to a novel intervertebral bone grafting posterior distraction forceps. Background Art

[0002] In the past few decades, spinal surgery has made great progress in technology and techniques. Among them, intervertebral bone grafting and internal fixation surgery is a commonly used technique in clinical practice. It promotes surgical segment fusion by implanting autologous bone or allogeneic bone and intervertebral fusion devices, thereby achieving stability reconstruction. When implanting autologous bone or allogeneic bone, the intervertebral space of the surgical patient is relatively narrow, and the broken bone particles accumulate in the intervertebral space. The access is blocked during the implantation of the intervertebral fusion device, which may squeeze the implanted bone fragments, causing the bone fragments to shift forward, break through the anterior longitudinal ligament, and cause anterior arteriovenous compression injury. In addition, for patients with extremely narrow intervertebral space, the intervertebral space needs to be expanded in parallel during surgery to expand the narrow area of ​​the intervertebral foramen and reduce the compression of the exit root.

[0003] The surgical instruments currently used focus more on the process of placing the intervertebral fusion device, rather than the access problem of the intervertebral fusion device implantation. Patients with severe intervertebral stenosis do not pay attention to whether the vertebral force is balanced during the process of stretching the upper and lower vertebrae, which can easily lead to end plate damage.

[0004] In order to overcome the above disadvantages, the present invention designs a novel intervertebral bone grafting posterior distraction forceps with adjustable width and parallel distraction. Utility Model Content

[0005] To this end, the utility model provides a novel distraction forceps after intervertebral bone grafting to solve the problems mentioned in the above background.

[0006] The utility model provides a novel intervertebral bone grafting posterior distraction forceps, the novel intervertebral bone grafting posterior distraction forceps comprising a distraction device body (1) composed of second expansion arms (3) rotatably connected on left and right sides and a first expansion arm (2) arranged on the second expansion arm (3), the top end of the first expansion arm (2) is provided with an integrally formed distraction plate (201), a locking mechanism (4) is arranged between the second expansion arms (3) rotatably connected on left and right sides, the locking mechanism (4) comprises a first fastening screw (401), a fixing spring sheet (402), a first connecting screw (403), a ratchet plate (404) and a ratchet slot (405), one end of the ratchet plate (404) is provided with a protrusion (4041), the first connecting screw (403) sets one end of the ratchet plate (404) The invention is arranged on the end of the second expansion arm (3) on the left side, and a gap is provided between the protrusion (4041) and the second expansion arm (3) on the left side. One end of the fixing spring sheet (402) is fixed to the second expansion arm (3) on the left side by a first fastening screw (401), and the other end of the fixing spring sheet (402) extends into the gap between the protrusion (4041) and the second expansion arm (3). The ventral side of the ratchet sheet (404) is provided with ratchets. The end of the second expansion arm (3) on the right side is provided with ratchet slots (405) matched with the ratchets. The ratchet slots (405) can lock the ratchet sheet (404) to fix the opening and width of the first expansion arm (2). The ventral side of the second expansion arm (3) is fixed with a "V"-shaped locking spring sheet (5) by a second fastening screw (406).

[0007] Furthermore, the first expansion arm (2) is movably connected to the second expansion arm (3), and an expansion mechanism (6) is provided at the connection between the first expansion arm (2) and the second expansion arm (3). The expansion mechanism (6) comprises a sliding screw (601), a connecting steel sheet (602), a fixing screw (603), and a through screw (604). The connecting steel sheets (602) are two and are cross-arranged in an "X" shape on the first expansion arm (2) and the second expansion arm (3). One end of the connecting steel sheet (602) is rotatably connected to the connection point between the first expansion arm (2) and the second expansion arm (3) through the through screw (604). A sliding groove (7) is provided on the first expansion arm (2), and the other end of the connecting steel sheet (602) is arranged in the sliding groove (7) through the sliding screw (601). The fixing screw (603) is arranged at the intersection of the two connecting steel sheets (602).

[0008] Furthermore, the second expansion arm (3) comprises a handle portion (8) and a second connecting screw (9), the handle portion (8) being provided with a groove fitting the shape of a hand, and the second connecting screw (9) being arranged at the connection points of the two rotatably connected second expansion arms (3).

[0009] Furthermore, the support plate (201) is a flat structure.

[0010] Furthermore, the locking spring piece (5) comprises a first spring piece (501) and a second spring piece (502), one end of the first spring piece (501) being arranged on the abdomen of the left second expansion arm (3), one end of the second spring piece (502) being arranged on the abdomen of the right second expansion arm (3), the other end of the first spring piece (501) being arranged with a through hole, and the other end of the second spring piece (502) being inserted into the through hole of the first spring piece (501).

[0011] Furthermore, there are four connecting steel sheets (602), and the four connecting steel sheets (602) are arranged in pairs to form an "X"-shaped structure, and are arranged in upper and lower layers on the first expansion arm (2) and the second expansion arm (3).

[0012] Compared with the prior art, the utility model provides a novel post-intervertebral bone grafting distraction forceps, which can extend into narrower areas and effectively distract the gap by setting the top end of the first expansion arm as a flat structure. It can effectively avoid interference from broken bones when implanting artificial bone materials, and provide doctors with a good implantation channel. At the same time, it can flexibly change the angle of entry into the vertebral body, distract the vertebral body in parallel, and ensure that the vertebral body is subjected to consistent force when distracted, thus avoiding secondary damage during the operation, improving the work efficiency of spinal surgery, and facilitating the patient's postoperative recovery. When doctors perform spinal surgery, they need to implant artificial bone materials. Failure to set an implantation channel affects the progress of the operation, and patients with severe intervertebral stenosis do not pay attention to whether the vertebral force is balanced during distraction of the upper and lower vertebrae, which can easily lead to endplate damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0014] Figure 1 This is a front view of a novel distraction forceps for intervertebral bone grafting according to the utility model;

[0015] Figure 2 This is an enlarged detail diagram of the locking mechanism of a novel intervertebral bone grafting posterior distraction forceps of the utility model;

[0016] Figure 3 This is a detailed diagram of a ratchet piece of a novel intervertebral bone grafting posterior distraction forceps according to the utility model.

[0017] The expansion device body 1, the first expansion arm 2, the expansion plate 201, the second expansion arm 3, the locking mechanism 4, the first fastening screw 401, the fixing spring 402, the first connecting screw 403, the ratchet piece 404, the protrusion 4041, the ratchet slot 405, the second fastening screw 406, the locking spring 5, the first spring 501, the second spring 502, the expansion mechanism 6, the sliding screw 601, the connecting steel sheet 602, the fixing screw 603, the through screw 604, the sliding groove 7, the handle part 8, and the second connecting screw 9. DETAILED DESCRIPTION

[0018] In order to make the purpose and advantages of the utility model more clearly understood, the utility model is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0020] See also Figure 1-3 As shown, the utility model provides a novel intervertebral bone grafting posterior distraction forceps, the novel intervertebral bone grafting posterior distraction forceps comprising a distraction device body (1) composed of second expansion arms (3) rotatably connected on left and right sides and a first expansion arm (2) arranged on the second expansion arm (3), the top end of the first expansion arm (2) is provided with an integrally formed distraction plate (201), and a locking mechanism (4) is provided between the second expansion arms (3) rotatably connected on left and right sides, the locking mechanism (4) comprises a first fastening screw (401), a fixing spring (402), a first connecting screw (403), a ratchet plate (404) and a ratchet slot (405), one end of the ratchet plate (404) is provided with a protrusion (4041), the first connecting screw (403) fixes one end of the ratchet plate (404) The invention is arranged on the end of the second expansion arm (3) on the left side, and a gap is provided between the protrusion (4041) and the second expansion arm (3) on the left side. One end of the fixing spring sheet (402) is fixed to the second expansion arm (3) on the left side by a first fastening screw (401), and the other end of the fixing spring sheet (402) extends into the gap between the protrusion (4041) and the second expansion arm (3). The ventral side of the ratchet sheet (404) is provided with ratchets. The end of the second expansion arm (3) on the right side is provided with a ratchet slot (405) matched with the ratchet. The ratchet slot (405) can lock the ratchet sheet (404) to fix the opening and width of the first expansion arm (2). The ventral side of the second expansion arm (3) is fixed with a "V"-shaped locking spring sheet (5) by a second fastening screw (406).

[0021] Furthermore, the first expansion arm (2) is movably connected to the second expansion arm (3), and an expansion mechanism (6) is provided at the connection between the first expansion arm (2) and the second expansion arm (3). The expansion mechanism (6) comprises a sliding screw (601), a connecting steel sheet (602), a fixing screw (603), and a through screw (604). The connecting steel sheets (602) are two and are cross-arranged in an "X" shape on the first expansion arm (2) and the second expansion arm (3). One end of the connecting steel sheet (602) is rotatably connected to the connection point between the first expansion arm (2) and the second expansion arm (3) through the through screw (604). A sliding groove (7) is provided on the first expansion arm (2), and the other end of the connecting steel sheet (602) is arranged in the sliding groove (7) through the sliding screw (601). The fixing screw (603) is arranged at the intersection of the two connecting steel sheets (602).

[0022] Furthermore, the second expansion arm (3) comprises a handle portion (8) and a second connecting screw (9), the handle portion (8) being provided with a groove fitting the shape of a hand, and the second connecting screw (9) being arranged at the connection points of the two rotatably connected second expansion arms (3).

[0023] Furthermore, the support plate (201) is a flat structure.

[0024] Furthermore, the locking spring piece (5) comprises a first spring piece (501) and a second spring piece (502), one end of the first spring piece (501) being arranged on the abdomen of the left second expansion arm (3), one end of the second spring piece (502) being arranged on the abdomen of the right second expansion arm (3), the other end of the first spring piece (501) being arranged with a through hole, and the other end of the second spring piece (502) being inserted into the through hole of the first spring piece (501).

[0025] Furthermore, there are four connecting steel sheets (602), and the four connecting steel sheets (602) are arranged in pairs to form an "X"-shaped structure, and are arranged in upper and lower layers on the first expansion arm (2) and the second expansion arm (3).

[0026] When in use, first hold the handle 8 to adjust the width of the expansion device body 1. The one-piece expansion plate 201 on the first expansion arm 2 is a flat structure, which can act on the expansion of the vertebral space in both the horizontal and vertical directions, and can be extended into a narrower part to effectively expand the gap. It can effectively avoid the interference of broken bone fragments for implanting artificial bone materials, and provide doctors with a good surgical space for implanting artificial bone materials. When the first expansion arm 2 is extended into the cone, the sliding screw 601 is changed in position in the sliding groove 7 through the connecting steel sheet 602 placed on the connecting point of the first expansion arm 2 and the second expansion arm 3. The connecting steel sheet 602 is four, two by two. It is a group of "X"-shaped cross connections, which can expand the second expansion arm 2 in parallel without changing the force direction to ensure uniform force on the upper and lower planes. The fixing spring piece 402 connected to the first fastening screw 401 can fix the ratchet piece 404. By connecting the screw 403 and the protrusion 4041, the ratchet piece 404 of the locking mechanism 4 can be placed in the ratchet slot 405 and the opening angle of the second expansion arm 3 can be adjusted to fix the device at the expansion height required by the patient, thereby improving the doctor's work efficiency. After use, the second fastening screw 406 connects the first spring piece 501 and the second spring piece 502 of the locking spring piece 5 to use their own elastic force to restore the expansion arm to its original angle and keep it fixed.

[0027] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

[0028] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A novel distraction forceps for intervertebral bone grafting, characterized in that: The novel intervertebral bone grafting posterior distraction forceps comprises a distraction device body (1) composed of second expansion arms (3) rotatably connected on left and right sides and a first expansion arm (2) arranged on the second expansion arm (3), the top end of the first expansion arm (2) is provided with an integrally formed distraction plate (201), and a locking mechanism (4) is provided between the second expansion arms (3) rotatably connected on left and right sides. The locking mechanism (4) comprises a first fastening screw (401), a fixing spring (402), a first connecting screw (403), a ratchet plate (404) and a ratchet slot (405), one end of the ratchet plate (404) is provided with a protrusion (4041), and the first connecting screw (403) sets one end of the ratchet plate (404) on the left second expansion arm ( 3), and a gap is provided between the protrusion (4041) and the second expansion arm (3) on the left side, one end of the fixing spring sheet (402) is fixed to the second expansion arm (3) on the left side by the first fastening screw (401), and the other end of the fixing spring sheet (402) extends into the gap between the protrusion (4041) and the second expansion arm (3), the ventral side of the ratchet sheet (404) is provided with ratchets, and the end of the second expansion arm (3) on the right side is provided with a ratchet slot (405) matched with the ratchet, and the ratchet slot (405) can lock the ratchet sheet (404) to fix the opening and width of the first expansion arm (2), and the ventral side of the second expansion arm (3) is fixed by the second fastening screw (406) with a "V"-shaped locking spring sheet (5).

2. A novel distraction forceps for intervertebral bone grafting according to claim 1, characterized in that: The first expansion arm (2) is movably connected to the second expansion arm (3); an expansion mechanism (6) is provided at the connection between the first expansion arm (2) and the second expansion arm (3); the expansion mechanism (6) comprises a sliding screw (601), a connecting steel sheet (602), a fixing screw (603), and a through screw (604); the connecting steel sheets (602) are two and are cross-arranged in an "X" shape on the first expansion arm (2) and the second expansion arm (3); one end of the connecting steel sheet (602) is rotatably connected to the connection point between the first expansion arm (2) and the second expansion arm (3) through the through screw (604); a sliding groove (7) is provided on the first expansion arm (2); the other end of the connecting steel sheet (602) is arranged in the sliding groove (7) through the sliding screw (601); and the fixing screw (603) is arranged at the intersection of the two connecting steel sheets (602).

3. The novel distraction forceps for intervertebral bone grafting according to claim 1 is characterized in that: The second expansion arm (3) comprises a handle portion (8) and a second connecting screw (9), wherein the handle portion (8) is provided with a groove fitting the shape of a hand, and the second connecting screw (9) is arranged at two connecting points of the second expansion arms (3) which are rotatably connected.

4. The novel distraction forceps after intervertebral bone grafting according to claim 1 is characterized in that: The support plate (201) is a flat structure.

5. The novel distraction forceps after intervertebral bone grafting according to claim 1 is characterized in that: The locking spring piece (5) comprises a first spring piece (501) and a second spring piece (502), one end of the first spring piece (501) being arranged on the abdomen of the left second expansion arm (3), one end of the second spring piece (502) being arranged on the abdomen of the right second expansion arm (3), the other end of the first spring piece (501) being arranged with a through hole, the other end of the second spring piece (502) being inserted into the through hole of the first spring piece (501).

6. The novel distraction forceps after intervertebral bone grafting according to claim 2 is characterized in that: There are four connecting steel sheets (602), and the four connecting steel sheets (602) are arranged in pairs to form an "X"-shaped structure, and are arranged in upper and lower layers on the first expansion arm (2) and the second expansion arm (3).

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