Fusion fixing device for lumbar vertebra lateral path and posterior path

Abstract

The utility model provides a fusion fixing device for a lumbar vertebra lateral path and a lumbar vertebra posterior path, and belongs to the technical field of medical instruments. The fusion fixing device for the lumbar lateral path and the posterior path comprises an upper fixing plate, a lower fixing plate and locking screws, the upper fixing plate and the lower fixing plate are respectively provided with screw holes suitable for the locking screws to penetrate through, the upper fixing plate is hinged to the lower fixing plate, and the locking screws penetrate through the screw holes. And the upper fixing plate and the lower fixing plate are respectively fixed on adjacent vertebrae by the locking screws. The fusible fixing device for the lumbar lateral path and the posterior path can be installed on the lateral side or the rear side of the vertebra according to the actual situation, the angle between the upper fixing plate and the lower fixing plate is adjusted according to the intervertebral space of a patient and the positions of the locking screws in the fixing process of the upper fixing plate and the lower fixing plate, and the fusion effect is achieved. The device adapts to the actual condition of a patient, reduces the operation difficulty, shortens the operation time, and relieves the pain of the patient.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a fusion fixation device for lateral and posterior approaches of the lumbar spine. Background Art

[0002] The spine is the backbone of the body, located in the middle of the back, connecting the skull at its upper end and the coccyx at its lower end. The spine is a complex structure composed of numerous connected vertebrae. The entire region from the first cervical vertebra to the coccyx is referred to as the vertebral column. During lateral and posterior approaches to the spine, spinal fixation devices are often used to stabilize the vertebrae. Most spinal fixation devices employed during fixation are integrated and relatively simple, with screws securing each end of the device to the two vertebrae. However, individual patient differences and medical conditions vary. Existing spinal fixation devices are generally fixed in length, requiring the preparation of multiple sizes. Even so, during surgery, the device may not be suitable for the intended use. The side of the device closest to the vertebrae is generally flat, poorly fitting the patient's vertebrae, and unsuitable for patients with bone hyperplasia. This can lead to unstable fixation, making it difficult to install and secure the device, prolonging the surgery, and even impacting the patient's postoperative recovery. Utility Model Content

[0003] The purpose of the utility model is to provide a fusion fixation device for lateral and posterior approaches of the lumbar spine, aiming to solve the problem that the length of the spinal fixation device cannot be adjusted, which affects the patient's postoperative recovery.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a lumbar lateral and posterior fusion fixation device, comprising an upper fixation plate, a lower fixation plate and a locking screw, wherein the upper fixation plate and the lower fixation plate are respectively provided with screw holes suitable for the locking screw to pass through, the upper fixation plate is hinged to the lower fixation plate, and the locking screw fixes the upper fixation plate and the lower fixation plate to adjacent vertebrae respectively.

[0005] In a possible implementation, a fixing block is provided at the upper end of the lower fixing plate, a hinge column is provided on one side of the fixing block, and a hinge sleeve is provided at the lower end of the upper fixing plate, and the hinge sleeve is sleeved on the outer side of the hinge column.

[0006] In a possible implementation, two groups of hinged columns are provided, which are respectively arranged on the left and right sides of the fixed block; two groups of hinged sleeves are provided, and the hinged sleeves are arranged in a one-to-one correspondence with the hinged columns.

[0007] In one possible implementation, the end of the hinge column away from the fixed block is located on the outside of the hinge sleeve, and a locking screw sleeve is provided at the end of the hinge column away from the fixed block. The locking screw sleeve is threadedly connected to the hinge column, and the locking screw sleeve is tightly pressed against the side walls of the upper fixed plate and the lower fixed plate.

[0008] In a possible implementation, an upper clearance groove matching the end face of the locking nut is provided on the side wall of the upper fixing plate, and a lower clearance groove matching the end face of the locking nut is provided on the side wall of the lower fixing plate.

[0009] In a possible implementation, a guide slope is provided on a side wall of the locking nut at one end close to the fixing block.

[0010] In a possible implementation, the locking nut and the end surface of the hinge column away from the fixing block are located in the same vertical plane.

[0011] In a possible implementation, the nail cap of the locking screw is plate-shaped, and the rotation slot of the locking screw extends into the stud of the locking screw.

[0012] In a possible implementation, the upper fixing plate and the lower fixing plate are 3D printed components.

[0013] In a possible implementation, the upper fixing plate and the lower fixing plate are provided with trabecular microporous structures.

[0014] The beneficial effects of the lumbar lateral and posterior fusion fixation device provided by the utility model are:

[0015] Compared with the prior art, an upper fixing plate, a lower fixing plate and a locking screw are provided. The upper fixing plate is arranged above the lower fixing plate, and the two are hingedly arranged. Screw holes are provided on both the upper fixing plate and the lower fixing plate. The locking screws pass through the screw holes to fix the upper fixing plate and the lower fixing plate to two adjacent vertebrae respectively. During the fixation process, the locking screws fix the upper fixing plate / lower fixing plate to the vertebrae, and the angle between the upper fixing plate and the lower fixing plate is adjusted to adapt to the specific physical condition of the patient. After the adjustment is completed, another set of locking screws is implanted to fix the lower fixing plate / upper fixing plate to the vertebrae. The device can be used in lateral surgery or posterior surgery, and is installed on the side or back of the vertebra according to actual conditions. It is suitable for patients with bone hyperplasia, increases the stability of fixation, reduces the difficulty of surgery, shortens the operation time, and alleviates the pain of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a front view structural diagram of a lumbar lateral and posterior fusion fixation device provided by an embodiment of the present invention;

[0018] Figure 2 The present invention provides a cross-sectional structural diagram of a lumbar lateral and posterior fusion fixation device for use in an embodiment of the present invention.

[0019] In the figure: 1. Upper fixing plate; 2. Articulated sleeve; 3. Lower fixing plate; 4. Fixing block; 5. Articulated column; 6. Screw hole; 7. Locking screw; 8. Rotation slot; 9. Locking nut; 10. Guide ramp. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is 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.

[0021] Please refer to Figure 1 、 Figure 2 A specific embodiment of a lumbar lateral and posterior fusion fixation device provided by the utility model is now described, comprising an upper fixation plate 1, a lower fixation plate 3 and a locking screw 7. The upper fixation plate 1 and the lower fixation plate 3 are respectively provided with screw holes 6 suitable for passing the locking screw 7. The upper fixation plate 1 is hinged to the lower fixation plate 3, and the locking screw 7 fixes the upper fixation plate 1 and the lower fixation plate 3 to the adjacent vertebrae respectively.

[0022] The present invention provides a lumbar fusion fixation device for lateral and posterior approaches, compared with the prior art, which is provided with an upper fixing plate 1, a lower fixing plate 3 and a locking screw 7. The upper fixing plate 1 is arranged above the lower fixing plate 3, and the two are hingedly arranged. The upper fixing plate 1 and the lower fixing plate 3 are both provided with screw holes 6. The locking screws 7 pass through the screw holes 6 to fix the upper fixing plate 1 and the lower fixing plate 3 on the two adjacent vertebrae respectively. During the fixation process, the locking screws 7 fix the upper fixing plate 1 / lower fixing plate 3 on the vertebrae, and adjust the angle between the upper fixing plate 1 and the lower fixing plate 3 to adapt to the specific physical condition of the patient. After the adjustment is completed, another set of locking screws 7 are implanted to fix the lower fixing plate 3 / upper fixing plate 1 on the vertebrae. The device can be used in lateral or posterior approach surgery, and can be installed on the side or back of the vertebra according to actual conditions. It is suitable for patients with bone hyperplasia, increases the stability of fixation, reduces the difficulty of surgery, shortens the operation time, and alleviates the pain of the patient.

[0023] For details, please refer to Figure 1 、 Figure 2 , including an upper fixing plate 1, a lower fixing plate 3 and a locking screw 7. The upper fixing plate 1 is arranged above the lower fixing plate 3. The upper fixing plate 1 and the lower fixing plate 3 are hingedly arranged. The angle between the upper fixing plate 1 and the lower fixing plate 3 is adjustable, which increases the adaptability of the device. Screw holes 6 are provided on the upper fixing plate 1 and the lower fixing plate 3. The locking screw 7 passes through the screw hole 6 to fix the upper fixing plate 1 and the lower fixing plate 3. The locking screw 7 and the screw hole 6 adopt a clearance fit to facilitate the locking screw 7 to pass through the screw hole 6.

[0024] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 The upper end of the lower fixed plate 3 is provided with a fixed block 4, and a hinge column 5 is provided on one side of the fixed block 4. The lower end of the upper fixed plate 1 is provided with a hinge sleeve 2, and the hinge sleeve 2 is sleeved on the outside of the hinge column 5.

[0025] For details, please refer to Figure 1 、 Figure 2 The fixed block 4 is arranged at the upper end of the lower fixed plate 3, the hinge column 5 is arranged on one side of the fixed block 4, the fixed block 4 and the hinge column 5 are arranged along the direction of the board surface of the lower fixed plate 3, the hinge sleeve 2 is arranged at the lower end of the upper fixed plate 1, the hinge sleeve 2 is arranged along the direction of the board surface of the upper fixed plate 1, and the hinge shaft passes through the hinge sleeve 2. The two are rotatably connected to facilitate the adjustment of the angle between the upper fixed plate 1 and the lower fixed plate 3.

[0026] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2There are two groups of hinged columns 5, which are respectively arranged on the left and right sides of the fixed block 4, and there are two groups of hinged sleeves 2, which are arranged in a one-to-one correspondence with the hinged sleeves 2 and the hinged columns 5.

[0027] For details, please refer to Figure 1 、 Figure 2 The fixed block 4 is arranged in the middle of the upper end of the lower fixed plate 3, and a group of hinge columns 5 are arranged on both sides of the fixed block 4. The lower end of the corresponding upper fixed plate 1 is provided with two groups of hinge sleeves 2. A space suitable for accommodating the fixed block 4 is formed between the two groups of hinge sleeves 2, which facilitates the adjustment of the angle between the upper fixed plate 1 and the lower fixed plate 3.

[0028] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 The end of the hinged column 5 away from the fixed block 4 is located on the outside of the hinged sleeve 2, and the end of the hinged column 5 away from the fixed block 4 is provided with a locking screw sleeve 9, which is threadedly connected to the hinged column 5, and the locking screw sleeve 9 is tightly pressed against the side walls of the upper fixed plate 1 and the lower fixed plate 3.

[0029] For details, please refer to Figure 1 、 Figure 2 The hinged column 5 on the right side of the fixed block 4 is defined as the right hinged column 5, and the hinged column 5 on the left side of the fixed block 4 is defined as the left hinged column 5. The right end of the right hinged column 5 passes through the hinge sleeve 2 and is located on the outside of the hinge sleeve 2. The locking screw sleeve 9 is sleeved on the right end of the hinged column 5 on the right side of the fixed block 4. The two are threadedly connected. The left side wall of the locking screw sleeve 9 is tightly pressed against the right side walls of the upper fixed plate 1 and the lower fixed plate 3 to lock the angle between the upper fixed plate 1 and the lower fixed plate 3. The left end of the left hinged column 5 passes through the hinge sleeve 2, and a stopper is provided on the left end of the left hinged column 5, which rests on the left side wall of the upper fixed plate 1 to increase the stability of the device.

[0030] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 The side wall of the upper fixed plate 1 is provided with an upper clearance groove that matches the end face of the locking nut sleeve 9, and the side wall of the lower fixed plate 3 is provided with a lower clearance groove that matches the end face of the locking nut sleeve 9.

[0031] For details, please refer to Figure 1 、 Figure 2 An upper paving groove is provided on the side wall of the upper fixed plate 1, and a lower paving groove is provided on the side wall of the lower fixed plate 3. The upper paving groove and the lower paving groove match the left end face of the locking screw sleeve 9, so that the locking screw sleeve 9 is pressed tightly against the right side wall of the upper fixed plate 1 and the lower fixed plate 3.

[0032] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 A guide slope 10 is provided on the side wall of the locking nut 9 close to the fixed block 4.

[0033] For details, please refer to Figure 1 、 Figure 2 A guide slope 10 is provided on the left side wall of the locking screw sleeve 9, and the diameter of the left end of the locking screw sleeve 9 gradually decreases as it moves to the left.

[0034] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 The locking nut 9 and the end surface of the hinge column 5 away from the fixing block 4 are located in the same vertical plane.

[0035] For details, please refer to Figure 1 、 Figure 2 , the right side wall of the locking nut 9 and the right end of the hinge column 5 are located in the same vertical plane.

[0036] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 The nail cap of the locking screw 7 is plate-shaped, and the rotation groove 8 of the locking screw 7 extends into the stud of the locking screw 7.

[0037] For details, please refer to Figure 1 、 Figure 2 The locking screw 7 includes a plate-shaped nail cap and a stud. A rotation groove 8 is provided on the nail cap to facilitate the rotation of the locking screw 7 by surgical instruments. The rotation groove 8 extends into the stud.

[0038] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 The upper fixing plate 1 and the lower fixing plate 3 are 3D printed components.

[0039] For details, please refer to Figure 1 、 Figure 2 The upper fixing plate 1 and the lower fixing plate 3 are both made by 3D printing.

[0040] As a specific embodiment of the lumbar lateral and posterior fusion fixation device provided by the present invention, please refer to Figure 1 、 Figure 2 The upper fixing plate 1 and the lower fixing plate 3 are provided with a trabecular microporous structure.

[0041] For details, please refer to Figure 1 、 Figure 2 The upper and lower fixation plates 1 and 3 are provided with a trabecular microporous structure, which is beneficial to the patient's bone growth. During the patient's bone growth process, the patient's vertebrae can achieve bone fusion with the upper and lower fixation plates 1 and 3, further increasing the stability of the installation of the upper and lower fixation plates 1 and 3, and avoiding slippage of the upper and lower fixation plates 1 and 3.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lumbar lateral and posterior fusion fixation device, characterized in that: The upper and lower fixing plates are respectively provided with screw holes suitable for the locking screws to pass through. The upper and lower fixing plates are hingedly connected to the lower fixing plate. The locking screws fix the upper and lower fixing plates respectively to adjacent vertebrae.

2. A lumbar lateral and posterior fusion fixation device as claimed in claim 1, characterized in that: The upper end of the lower fixed plate is provided with a fixed block, one side of the fixed block is provided with a hinge column, the lower end of the upper fixed plate is provided with a hinge sleeve, and the hinge sleeve is sleeved on the outer side of the hinge column.

3. A lumbar lateral and posterior fusion fixation device as claimed in claim 2, characterized in that: The hinge columns are provided in two groups, which are respectively provided on the left and right sides of the fixed block; the hinge sleeves are provided in two groups, which are provided in a one-to-one correspondence with the hinge columns.

4. The lumbar lateral and posterior fusion fixation device according to claim 2, characterized in that: The end of the hinge column away from the fixed block is located on the outside of the hinge sleeve, and the end of the hinge column away from the fixed block is provided with a locking screw sleeve, which is threadedly connected to the hinge column and tightly pressed against the side walls of the upper fixed plate and the lower fixed plate.

5. The lumbar lateral and posterior fusion fixation device according to claim 4, characterized in that: An upper clearance groove matching the end face of the locking nut is provided on the side wall of the upper fixing plate, and a lower clearance groove matching the end face of the locking nut is provided on the side wall of the lower fixing plate.

6. A lumbar lateral and posterior fusion fixation device as claimed in claim 5, characterized in that: A guiding slope is provided on the side wall of the locking nut at one end close to the fixing block.

7. The lumbar lateral and posterior fusion fixation device according to claim 4, characterized in that: The locking nut and the end surface of the hinge column away from the fixing block are located in the same vertical plane.

8. The lumbar lateral and posterior fusion fixation device according to claim 1, characterized in that: The nail cap of the locking screw is plate-shaped, and the rotation groove of the locking screw extends into the stud of the locking screw.

9. The lumbar lateral and posterior fusion fixation device according to claim 1, characterized in that: The upper fixing plate and the lower fixing plate are 3D printed components.

10. The lumbar lateral and posterior fusion fixation device according to claim 1, characterized in that: The upper fixing plate and the lower fixing plate are provided with trabecular microporous structures.

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