Adjustable osteotomy and bone grafting fusion cage

Abstract

The utility model discloses an adjustable osteotomy and bone grafting fusion cage, which belongs to the technical field of medical instruments, and comprises a container frame capable of implanting bone grafts, the container frame comprises an upper plate layer, a hinge piece and a lower plate layer, the side surface between the upper plate layer and the lower plate layer is of a net structure, the lower plate layer is a solid plane, the upper plate layer is a rectangular hollow plane, and the hinge piece is arranged on the lower plate layer. A bone graft is placed in the container frame through the upper plate layer; the opening and closing angle of the fusion cage can be accurately adjusted according to the size of an osteotomy gap through the hinge piece, so that high individuation for different patients and operation requirements is achieved, meanwhile, a net-shaped structure is designed on the side face of the fusion cage, the requirement for adjusting the opening and closing angle can be met, bone grafts can be prevented from leaking out of the side face, and the fusion cage is convenient to use. In order to maximize the bone grafting efficiency and the contact area so as to promote bone healing, unique developing marks are further designed, the marks are clearly visible in X-rays, it is ensured that a surgeon can monitor the position and state of the fusion cage in real time, then the bone grafting process is accurately controlled, and potential complications are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment and provides an adjustable osteotomy and bone grafting fusion device. Background Art

[0002] High tibial osteotomy (HTO) is an effective surgical procedure for the treatment of knee osteoarthritis. It can relieve knee pain and correct deformity by reconstructing the force line of the lower limbs and transferring part of the force to the lateral compartment. HTO is divided into medial open high tibial osteotomy and lateral closed high tibial osteotomy. Medial open high tibial osteotomy is widely used in clinical practice. After fixing the tibia during surgery, bone grafting is required to fill the osteotomy gap.

[0003] Currently, there are problems in bone grafting in the tibial osteotomy gap, such as long bone grafting time, poor bone graft strength, and inability to adjust the opening and closing angle according to the tibial osteotomy angle, thereby being unable to adapt to the shape and size of the osteotomy gap. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an adjustable osteotomy and bone grafting fusion device, which aims to solve the problems of long bone grafting time, poor bone grafting strength and inability to adjust the opening and closing angle according to the osteotomy angle of the tibia, thereby failing to adapt to the shape and size of the osteotomy gap.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] The utility model provides an adjustable osteotomy and bone grafting fusion device, comprising a container frame in which a bone graft can be implanted, the container frame comprising an upper plate layer, a hinge and a lower plate layer, the side surface between the upper plate layer and the lower plate layer is a mesh structure, the lower plate layer is a solid plane, and the upper plate layer is a rectangular hollow plane, the bone graft is placed in the container frame through the upper plate layer, the upper plate layer is movably connected to the lower plate layer through the hinge and is located above the lower plate layer, and the upper plate layer and the lower plate layer are clamped to each other at one end away from the hinge.

[0007] Furthermore, prominent marks are provided at both the front and rear ends of the container frame.

[0008] Furthermore, the hinge component includes two hinge blocks and a hinge seat, the two hinge blocks are respectively fixedly connected to the upper plate layer, the two hinge blocks are also respectively movably connected to the hinge seat and are located at both ends of the hinge seat, and the hinge seat is fixedly connected to the lower plate layer and is located at one end of the lower plate layer.

[0009] Furthermore, the adjustable osteotomy and bone grafting fusion device also includes two screws and two nuts. The end face of the hinge block has a receiving groove. The two screws are respectively fixedly connected to the hinge seat and are symmetrically arranged at the two ends of the hinge seat and are also located in the receiving groove. The two nuts are respectively threadedly connected to the corresponding screws and are sleeved on the screws. The two nuts also resist each other with the corresponding hinge blocks and are located in the receiving groove.

[0010] Furthermore, the side of the mesh structure is a porous structure, and the porous structure includes a regular polyhedron, a ring-shaped polyhedron, and a star-shaped polyhedron.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model is an adjustable osteotomy and bone grafting fusion device. The opening and closing angle of the fusion device can be accurately adjusted according to the size of the osteotomy gap through the hinge, allowing the surgeon to adjust the angle according to actual needs, thereby achieving a high degree of personalization for different patients and surgical needs. At the same time, unique developing marks are designed. These marks are clearly visible in X-rays, ensuring that the surgeon can monitor the position and state of the fusion device in real time, thereby accurately controlling the bone grafting process and avoiding potential complications. The mesh structure is designed on the side of the fusion device, which can not only meet the needs of adjusting the opening and closing angle, but also prevent the bone graft from leaking from the side, aiming to maximize the bone grafting efficiency and contact area, thereby promoting bone healing;

[0013] 2. The utility model is an adjustable osteotomy and bone grafting fusion device. Through the design of the screw rod and the nut, it is convenient to tighten the fusion device after adjusting the opening and closing angle. The upper plate layer and the plate layer are then snap-connected to prevent the angle from changing randomly. Through the above structure, the angle after the adjustment can be fixed with double fixation.

[0014] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0016] Figure 1 It is a front view of the first embodiment of the utility model.

[0017] Figure 2The utility model Figure 1 Section view along line AA.

[0018] Figure 3 It is a front view of the second embodiment of the utility model.

[0019] Figure 4 The utility model Figure 3 Sectional view along line BB.

[0020] Figure numerals: 1 is an upper plate layer, 2 is a hinge member, 3 is a lower plate layer, 4 is a mesh structure, 5 is a hinge block, 6 is a hinge seat, 7 is a screw rod, 8 is a nut, and 9 is a receiving groove. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0022] The first embodiment, as Figure 1-2 As shown, Figure 1 This is a front view of the first embodiment of the utility model. Figure 2 The utility model Figure 1 Section view along line AA.

[0023] The utility model discloses an adjustable osteotomy and bone graft fusion device, comprising a container frame in which a bone graft can be implanted, the container frame comprising an upper plate layer 1, a hinge 2 and a lower plate layer 3, the side between the upper plate layer 1 and the lower plate layer 3 is a mesh structure 4, the lower plate layer 3 is a solid plane, the upper plate layer 1 is a rectangular hollow plane, the bone graft is placed in the container frame through the upper plate layer 1, the upper plate layer 1 is movably connected with the lower plate layer 3 through the hinge 2, and is located above the lower plate layer 3, and the upper plate layer 1 and the lower plate layer 3 are clamped with each other at one end away from the hinge 2, and the hinge 2 allows the opening and closing angle of the fusion device to be accurately adjusted according to the size of the osteotomy gap, allowing the surgeon to adjust the angle according to actual needs degree, thereby achieving a high degree of personalization for different patients and surgical needs. The opening and closing angle between the upper plate layer 1 and the lower plate layer 3 is 5° to 20°. It should be noted that the ends of the upper plate layer 1 and the lower plate layer 3 away from the hinge 2 are connected by snapping. At the same time, the mesh structure 4 is designed on the side of the fusion device to meet the needs of adjusting the opening and closing angle and prevent the bone graft from leaking from the side, thereby promoting bone healing. The container frame is made of absorbable material, which is a composite of 70% polylactic acid-glycolic acid copolymer (PLGA) and 30% tricalcium phosphate (TCP) and has good biocompatibility; the mesh structure 4 on the side of the fusion device is made of silk fibroin material.

[0024] The front and rear ends of the container frame are provided with highlight marks. By selecting a ceramic mark as the material of the development mark and adding an iodine developer or a barium developer, the visibility of the polymer in X-rays or CT scans can be improved while maintaining MRI compatibility. By embedding the developer in the polymer, a fusion device with both high mechanical strength and good development performance can be manufactured; the application of this material can ensure that the status of the fusion device can be clearly monitored under any imaging technology.

[0025] The working / implementation / use principle of the utility model is as follows: when performing a medial open high tibial osteotomy, the surgeon first performs medial tibial osteotomy, measures the osteotomy angle after the steel plate is fixed, and then adjusts the opening and closing angle between the upper plate layer 1 and the lower plate layer 3 according to the osteotomy angle to ensure that it perfectly matches the osteotomy gap; subsequently, the pre-treated bone graft is filled into the fusion device through the upper plate layer 1; the design of the fusion device ensures that the bone graft is evenly distributed and optimizes the bone grafting process; through the development mark, the surgeon can monitor the position of the fusion device in real time during the operation to ensure that it is correctly placed and remains stable throughout the healing process; and the use of PLGA and TCP composite materials not only provides the necessary mechanical support, but also reduces the risk of postoperative complications due to its excellent biocompatibility, thereby effectively reducing the risk of displacement of the bone graft material, while simplifying the surgical operation and shortening the operation time; the design of the development mark makes intraoperative and postoperative monitoring more convenient, improves the safety of the operation and the predictability of the effect.

[0026] The second embodiment, as Figure 3-4 As shown, Figure 3 It is a front view of the second embodiment of the utility model. Figure 4 The utility model Figure 3 Cross-sectional view along line BB.

[0027] Based on the first embodiment, the utility model provides an adjustable osteotomy and bone grafting fusion device, wherein the hinge component 2 includes two hinge blocks 5 and a hinge seat 6, the two hinge blocks 5 are respectively fixedly connected to the upper plate layer 1, the two hinge blocks 5 are also respectively movably connected to the hinge seat 6, and are located at both ends of the hinge seat 6, the hinge seat 6 is fixedly connected to the lower plate layer 3, and is located at one end of the lower plate layer 3, and the opening and closing angles of the upper plate layer 1 and the lower plate layer 3 can be easily adjusted by the cooperation between the hinge seat 6 and the hinge block 5, so that the fusion device can accurately adapt to various osteotomy gaps, reduce the uncertainty in the operation, and improve the efficiency and success rate of the operation.

[0028] The adjustable osteotomy and bone grafting fusion device also includes two screws 7 and two nuts 8. The end surface of the hinge block 5 has a receiving groove 9. The two screws 7 are fixedly connected to the hinge seat 6 respectively and are symmetrically arranged at the two ends of the hinge seat 6 and are also located in the receiving groove 9. The two nuts 8 are threadedly connected to the corresponding screws 7 respectively and are sleeved on the screws 7. The two nuts 8 also resist each other with the corresponding hinge blocks 5 and are located in the receiving groove 9. Through the design of the screws 7 and the nuts 8, it is convenient to tighten the fusion device after the opening and closing angles are adjusted, thereby preventing the angle from changing at will. First, the nuts 8 are rotated to rotate on the screws 7 and move toward the receiving groove 9. When the two nuts 8 resist each other, the tightness between the hinge block 5 and the hinge seat 6 can be improved, thereby preventing the angle from changing after the adjustment is completed, thereby ensuring the stability of the fusion device.

[0029] The side of the mesh structure 4 is a porous structure, and the porous structure includes a regular polyhedron, a ring polyhedron, and a star polyhedron.

[0030] The working / implementation / use principle of the utility model is: through the cooperation between the hinge seat 6 and the hinge block 5, the opening and closing angles of the upper plate layer 1 and the lower plate layer 3 can be adjusted, so that the fusion device can accurately adapt to various osteotomy gaps, reduce the uncertainty in the operation, and improve the efficiency and success rate of the operation. Through the design of the screw rod 7 and the nut 8, the opening and closing angle of the fusion device can be adjusted and tightened, thereby preventing the angle from changing randomly. First, the nut 8 is rotated to make the nut 8 rotate on the screw rod 7 and move toward the accommodating groove 9. When the two nuts 8 resist the hinge block 5 against each other, the tightness between the hinge block 5 and the hinge seat 6 can be improved, thereby preventing the angle from changing after the adjustment is completed, thereby ensuring the stability of the fusion device.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. An adjustable osteotomy and bone grafting fusion device, characterized in that: The invention comprises a container frame in which a bone graft can be implanted, the container frame comprises an upper plate layer, a hinge and a lower plate layer, the side surface between the upper plate layer and the lower plate layer is a mesh structure, the lower plate layer is a solid plane, and the upper plate layer is a rectangular hollow plane, the bone graft is placed in the container frame through the upper plate layer, the upper plate layer is movably connected to the lower plate layer through the hinge and is located above the lower plate layer, and the upper plate layer and the lower plate layer are clamped to each other at one end away from the hinge.

2. The adjustable osteotomy and bone grafting fusion device according to claim 1, characterized in that: The front and rear ends of the container frame are both provided with prominent marks.

3. The adjustable osteotomy and bone grafting fusion device according to claim 2, characterized in that: The hinge member includes two hinge blocks and a hinge seat. The two hinge blocks are fixedly connected to the upper plate layer respectively. The two hinge blocks are also movably connected to the hinge seat respectively and are located at both ends of the hinge seat. The hinge seat is fixedly connected to the lower plate layer and is located at one end of the lower plate layer.

4. The adjustable osteotomy and bone grafting fusion device according to claim 3, characterized in that: The adjustable osteotomy and bone grafting fusion device also includes two screws and two nuts. The end face of the hinge block has a receiving groove. The two screws are respectively fixedly connected to the hinge seat and are symmetrically arranged at the two ends of the hinge seat and are also located in the receiving groove. The two nuts are respectively threadedly connected to the corresponding screws and are sleeved on the screws. The two nuts also resist each other with the corresponding hinge blocks and are located in the receiving groove.

5. The adjustable osteotomy and bone grafting fusion device according to claim 4, characterized in that: The side of the mesh structure is a porous structure, and the porous structure includes a regular polyhedron, a ring-shaped polyhedron, and a star-shaped polyhedron.

Images