A lumbar spinal screw device for osteoporosis

Abstract

The utility model relates to medical instrument technical field, concretely relates to a lumbar screw device for osteoporosis, including fixed mainboard, still including fixing device, fixing device includes cone screw, pasting board, transverse process screw, stabilizer and hinged component, and the cone screw is with fixed mainboard screw thread cooperation, and pasting board is through hinged component and fixed mainboard swing joint, and stabilizer fixed mounting is on pasting board, and is located pasting board far from fixed mainboard's one side, and transverse process screw screw thread penetrates stabilizer, and through the cone screw and hit into cone, make fixed mainboard fixed on cone, and through the cooperation of transverse process screw and stabilizer, make pasting board fixed on pedicle, realize the auxiliary fixation of fixed mainboard, to this end complete the fixation to fractured lumbar vertebra, because reduced the use of screw, and then in guarantee fixed effect's simultaneously, reduced the destruction to lumbar vertebra.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a lumbar screw device for osteoporosis. Background Technology

[0002] Osteoporosis is the most common skeletal disease, characterized by low bone mass, damage to bone microstructure, increased bone fragility, and a higher risk of fractures. Osteoporotic vertebral compression fractures are the most common complication of osteoporosis. Vertebroplasty and cement-reinforced pedicle screw fixation are existing techniques for treating osteoporotic vertebral compression fractures. However, both techniques require injecting bone cement into the vertebral body. Bone cement has a certain degree of toxicity; if it leaks into the vertebral body, it may cause local thermal burns; if it leaks into the spinal canal, it may cause mechanical compression of the spinal cord; and postoperative compression fractures of adjacent vertebrae may occur.

[0003] Existing patent CN221980856U describes a three-column fixation screw for osteoporosis in the lumbar spine. This screw utilizes pedicle screws, transverse process screws, and spinous process screws to create a three-column fixation system. This increases the number of fixation points, improving the success rate of fixation. Furthermore, with the assistance of the transverse and spinous process screws, the pedicle screws are less prone to loosening, allowing for simultaneous fixation of the anterior, middle, and posterior columns of the lumbar spine, achieving immediate stability. In addition, when used with a fixation plate, it effectively replaces the supporting and fixing function of bone cement, effectively avoiding bone cement reactions associated with its use.

[0004] However, in the process of using an existing patented three-column fixation osteoporosis screw for the lumbar spine, the device forms a three-column fixation through three sets of screws: pedicle screws, transverse process screws, and spinous process screws, which improves the fixation effect of the fractured lumbar spine. However, the three sets of screws are driven into the vertebral body, transverse process, and spinous process respectively, resulting in a high degree of damage to the lumbar spine. Utility Model Content

[0005] The purpose of this invention is to provide a lumbar screw device for osteoporosis, which solves the problem that the aforementioned device, which uses three sets of screws—pedicle screws, transverse process screws, and spinous process screws—to form a three-column fixation, improves the fixation effect of fractured lumbar vertebrae, but the three sets of screws are driven into the vertebral body, transverse process, and spinous process respectively, resulting in a high degree of damage to the lumbar vertebrae.

[0006] To achieve the above objectives, this utility model provides a lumbar screw device for osteoporosis, including a fixed main board and a fixing device. The fixing device includes a conical screw, a fitting plate, a transverse screw, a stabilizer, and a hinge assembly. The conical screw is threadedly engaged with the fixed main board. The fitting plate is rotatably connected to the fixed main board through the hinge assembly. The stabilizer is fixedly mounted on the fitting plate and located on the side of the fitting plate away from the fixed main board. The transverse screw is threaded through the stabilizer.

[0007] The hinge assembly includes a fixed base, a hinge shaft, and a connecting sleeve. The fixed base is fixedly mounted on the fixed main board; the hinge shaft is fixedly mounted on the fixed base; and the connecting sleeve is fixedly mounted on the bonding plate and rotatably connected to the hinge shaft.

[0008] The hinge assembly further includes a locking member, which includes a first locking cap and a second locking cap. The first locking cap is threadedly connected to the hinge shaft; the second locking cap is threadedly connected to the hinge shaft, and the second locking cap is located at the end of the hinge shaft away from the first locking cap.

[0009] The fixed motherboard is further provided with vertical stripes and a first protrusion. The vertical stripes are fixedly installed on the fixed motherboard, and the first protrusion is fixedly installed on the fixed motherboard and close to the vertical stripes.

[0010] The bonding plate is further provided with horizontal stripes and a second protrusion. The horizontal stripes are fixedly installed on the bonding plate, and the second protrusion is fixedly installed on the bonding plate and located on the side of the bonding plate close to the horizontal stripes.

[0011] This utility model discloses a lumbar screw device for osteoporosis. In use, the inner arc surface of the fixing plate is fitted against the lumbar vertebral body, and the vertebral screw is driven into the vertebral body. Then, through the rotational engagement of the hinge shaft and the connecting sleeve, the fitting plate is rotated and adjusted so that the outer arc surface of the fitting plate fits against the pedicle, and the stabilizer is secured to the transverse process. At this point, the first locking cap and the second locking cap are rotated respectively, causing them to move towards each other until they are firmly abutting against the connecting sleeve. This process initially positions the adhesive plate, then inserts the transverse process screw into the transverse process. With the cooperation of the stabilizer, the adhesive plate is fixed to the transverse process. Subsequently, the conical screw is inserted into the vertebral body, fixing the main fixation plate to the vertebral body. Furthermore, through the cooperation of the transverse process screw and the stabilizer, the adhesive plate is fixed to the pedicle, thus providing auxiliary fixation for the main fixation plate. This completes the fixation of the fractured lumbar vertebra. By reducing the use of screws, the fixation effect is maintained while minimizing damage to the lumbar vertebra. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of a lumbar screw device for osteoporosis according to this utility model.

[0014] Figure 2 This is a structural schematic diagram of the fixing device of this utility model.

[0015] In the diagram: 101-Fixed main board, 102-Conical screw, 103-Adhesive plate, 104-Horizontal screw, 105-Stabilizer, 106-Fixed base, 107-Hinge shaft, 108-Connecting sleeve, 109-First locking cap, 110-Second locking cap, 111-Vertical stripe, 112-First protrusion, 113-Horizontal stripe, 114-Second protrusion. Detailed Implementation

[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0017] The embodiment of this application is as follows:

[0018] Please see Figure 1-2 , Figure 1 This is a schematic diagram of the overall structure of a lumbar screw device for osteoporosis according to this utility model. Figure 2This is a structural schematic diagram of the fixing device of this utility model.

[0019] This utility model provides a lumbar screw device for osteoporosis: it includes a fixing main board 101 and a fixing device, the fixing device including a vertebral screw 102, a fitting plate 103, a transverse process screw 104, a stabilizing frame 105 and a hinge assembly, the hinge assembly including a fixing seat 106, a hinge shaft 107 and a connecting sleeve 108, the hinge assembly also including a locking member, the locking member including a first locking cap 109 and a second locking cap 110, the fixing main board 101 is also provided with vertical stripes 111 and a first protrusion 112, the fitting plate 103 is also provided with horizontal stripes 113 and a second protrusion 114. The above solution solves the problem that the above-mentioned device forms a three-column fixation with three sets of screws, pedicle screws, transverse process screws and spinous process screws, which improves the fixation effect of fractured lumbar vertebrae, but the three sets of screws are driven into the vertebral body, transverse process and spinous process respectively, resulting in a high degree of damage to the lumbar vertebrae. The above solution can be used in the scenario of lumbar vertebra fixation for osteoporosis.

[0020] In this embodiment, the fixation of the main plate 101 is completed by fixing the main plate 101 with the conical screw 102, and by the auxiliary fixation of the main plate 101 with the transverse screw 104, the stabilizer 105 and the fitting plate 103. Since the use of screws is reduced, the damage to the lumbar spine is reduced while ensuring the fixation effect.

[0021] The conical screw 102 is threadedly engaged with the fixed main plate 101. The bonding plate 103 is rotatably connected to the fixed main plate 101 via the hinge assembly. The stabilizer 105 is fixedly mounted on the bonding plate 103 and located on the side of the bonding plate 103 away from the fixed main plate 101. The transverse screw 104 is threaded through the stabilizer 105. Both the fixed main plate 101 and the bonding plate 103 are made of medical-grade titanium alloy. The recesses of the fixed main plate 101 and the bonding plate 103 are in opposite directions. The frame 105 has a lateral U-shaped structure. In use, the cone screw 102 is driven into the cone, so that the fixing main plate 101 is fixed on the cone. The angle of the fitting plate 103 is adjusted by the hinge assembly, so that the fitting plate 103 fits with the pedicle and the stabilizing frame 105 engages with the transverse process. The transverse process screw 104 is driven into the transverse process to achieve auxiliary fixation of the fixing main plate 101, thereby completing the fixation of the fractured lumbar vertebra. By reducing the use of screws, the damage to the lumbar vertebra is reduced while ensuring the fixation effect.

[0022] Secondly, the fixing seat 106 is fixedly installed on the fixing main plate 101; the hinge shaft 107 is fixedly installed on the fixing seat 106; the connecting sleeve 108 is fixedly installed on the bonding plate 103 and rotatably connected to the hinge shaft 107. The fixing seat 106 is disposed on the upper and lower sides of the side plate of the fixing main plate 101, and the hinge shaft 107 is disposed between the fixing seats 106. The inner diameter of the connecting sleeve 108 is equal to the diameter of the hinge shaft 107. Through the rotational cooperation of the connecting sleeve 108 and the hinge shaft 107, the angle of the bonding plate 103 can be easily adjusted.

[0023] Secondly, the first locking cap 109 is threadedly connected to the hinge shaft 107; the second locking cap 110 is threadedly connected to the hinge shaft 107, and the second locking cap 110 is located at the end of the hinge shaft 107 away from the first locking cap 109. The first locking cap 109 and the second locking cap 110 are internally threaded. By turning the first locking cap 109 and the second locking cap 110, the first locking cap 109 and the second locking cap 110 clamp the connecting sleeve 108, which can fix the adjusted connecting sleeve 108, thereby achieving the initial positioning of the bonding plate 103.

[0024] Furthermore, the vertical stripes 111 are fixedly mounted on the fixed motherboard 101; the first protrusion 112 is fixedly mounted on the fixed motherboard 101 and close to the vertical stripes 111. The vertical stripes 111 are spaced apart on the inner arc surface of the fixed motherboard 101, and the first protrusion 112 is spaced apart between the vertical stripes 111. The vertical stripes 111 and the first protrusion 112 are made of medical-grade silicone rubber. Through the cooperation of the vertical stripes 111 and the first protrusion 112, the fixed motherboard 101 can better fit against the cone surface.

[0025] Finally, the horizontal stripes 113 are fixedly installed on the bonding plate 103; the second protrusion 114 is fixedly installed on the bonding plate 103 and located on the side of the bonding plate 103 near the horizontal stripes 113. The horizontal stripes 113 are spaced apart on the outer arc surface of the bonding plate 103, and the second protrusion 114 is disposed between the horizontal stripes 113. The horizontal stripes 113 and the second protrusion 114 are made of medical silicone rubber. Through the cooperation of the horizontal stripes 113 and the second protrusion 114, the bonding plate 103 can better fit with the pedicle.

[0026] In this embodiment, during use, the inner arc surface of the fixing main board 101 is fitted against the lumbar vertebral body, and the vertebral screw 102 is driven into the vertebral body. Then, through the rotational engagement of the hinge shaft 107 and the connecting sleeve 108, the fitting plate 103 is rotated and adjusted, so that the outer arc surface of the fitting plate 103 fits against the pedicle, and the stabilizer 105 is secured to the transverse process. At this time, the first locking cap 109 and the second locking cap 110 are rotated respectively, causing the first locking cap 109 and the second locking cap 110 to move towards each other until they are tightly abutted against the connecting sleeve 108, thus securing the vertebral body. The position of the fitting plate 103 is initially determined. Then, the transverse process screw 104 is driven into the transverse process. With the cooperation of the stabilizer 105, the fitting plate 103 is fixed to the transverse process. Then, the cone screw 102 is driven into the cone, so that the fixing plate 101 is fixed to the cone. With the cooperation of the transverse process screw 104 and the stabilizer 105, the fitting plate 103 is fixed to the pedicle, thereby achieving auxiliary fixation of the fixing plate 101. This completes the fixation of the fractured lumbar vertebra. By reducing the use of screws, the damage to the lumbar vertebra is reduced while ensuring the fixation effect.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A lumbar screw device for osteoporosis, comprising a fixing plate, characterized in that, It also includes fixing devices; The fixing device includes a conical screw, a bonding plate, a transverse screw, a stabilizer, and a hinge assembly. The conical screw is threadedly engaged with the main fixing plate. The bonding plate is rotatably connected to the main fixing plate through the hinge assembly. The stabilizer is fixedly mounted on the bonding plate and located on the side of the bonding plate away from the main fixing plate. The transverse screw is threaded through the stabilizer.

2. The lumbar screw device for osteoporosis as described in claim 1, characterized in that, The hinge assembly includes a fixed base, a hinge shaft, and a connecting sleeve. The fixed base is fixedly mounted on the fixed main board; the hinge shaft is fixedly mounted on the fixed base; and the connecting sleeve is fixedly mounted on the bonding plate and rotatably connected to the hinge shaft.

3. The lumbar screw device for osteoporosis as described in claim 2, characterized in that, The hinge assembly further includes a locking member, which includes a first locking cap and a second locking cap. The first locking cap is threadedly connected to the hinge shaft; the second locking cap is threadedly connected to the hinge shaft, and the second locking cap is located at the end of the hinge shaft away from the first locking cap.

4. The lumbar screw device for osteoporosis as described in claim 1, characterized in that, The fixed motherboard is also provided with vertical stripes and a first protrusion. The vertical stripes are fixedly installed on the fixed motherboard; the first protrusion is fixedly installed on the fixed motherboard and close to the vertical stripes.

5. The lumbar screw device for osteoporosis as described in claim 1, characterized in that, The bonding plate is also provided with horizontal stripes and a second protrusion. The horizontal stripes are fixedly installed on the bonding plate; the second protrusion is fixedly installed on the bonding plate and is located on the side of the bonding plate close to the horizontal stripes.

Images