Periosteum distraction device
By designing a baffle plate to distribute pressure and using hollow screws and steel pins for fixation, the problem of screws penetrating the bone in periosteal traction devices was solved, achieving bone protection and pain relief, and improving the safety and ease of operation of the surgery.
Patent Information
- Application Number
- CN202511865418.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-01-09
AI Technical Summary
In existing periosteal traction devices, traction screws can easily penetrate the bone, leading to bone damage, pain, and infection risks. Furthermore, traditional devices apply pressure to the bone in a point-like manner, which can easily cause local pain.
The design includes a tension plate, a baffle plate, tension screws, and steel pins. The baffle plate disperses the pressure, and hollow screws and steel pins are used for fixation. The contact surface between the baffle plate and the bone has multiple protrusions. A cylinder connects the tension plate and the baffle plate to ensure coaxial stability and reduce the bone contact area.
It effectively prevents tension screws from penetrating the bone, reduces bone damage and pain, lowers the risk of fractures and osteomyelitis, and has a simple structure, is easy to operate, and is highly safe.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, specifically to a periosteal traction device. Background Technology
[0002] In periosteal distraction surgery, the commonly used distraction plate applies direct pressure to the bone via distraction screws. During distraction, osteoporosis in patients can easily lead to screws penetrating the cortical bone or even into the medullary cavity, causing risks such as distraction failure, fractures, and osteomyelitis. Furthermore, traditional devices apply pressure to the bone in a point-like manner, easily causing localized pain in patients. Therefore, there is an urgent need for a distraction device that can effectively distribute pressure and prevent screws from penetrating the bone. Summary of the Invention
[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a periosteal traction device to solve the problems of traction screws easily penetrating the bone, causing bone damage, pain, and infection risks in the prior art.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a periosteal traction device, comprising a traction plate, at least one blocking plate, a traction screw, and a steel needle. The traction plate has a threaded hole and a cylindrical fixing hole in its center; the blocking plate is located below the traction plate, and has a central hole and a cylindrical fixing hole in its center; the traction screw is a hollow screw used to screw into the threaded hole along the steel needle; the steel needle is used to pass through the central hole and drill into the bone for fixation. The diameter of the central hole is smaller than the outer diameter of the traction screw, allowing the steel needle to pass through.
[0005] Furthermore, an integrally formed cylinder is provided inside the second cylindrical fixing hole, and the tension plate passes through the cylinder through the first fixing hole and is connected to the blocking plate.
[0006] Furthermore, the surface of the baffle plate that contacts the bone is provided with multiple protrusions.
[0007] The beneficial effects of this invention are as follows: 1. The blocking plate can effectively disperse the pressure of the tension screw and prevent it from penetrating the bone cortex, which is especially suitable for patients with osteoporosis; 2. A stable connection is achieved by connecting the tension plate and the blocking plate with a cylinder, ensuring that the two are coaxial during tensioning and facilitating surgical assembly; 3. The contact surface between the baffle plate and the bone is equipped with multiple protrusions to form a limited contact surface, reduce bone irritation, and relieve pain; 4. Reduces bone damage and lowers the risk of fractures; 5. The tension screw does not enter the medullary cavity, thus avoiding the risk of osteomyelitis; 6. The structure is simple, the surgical procedure is convenient, and the safety is high. Attached Figure Description
[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0009] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0010] Figure 2 An exploded view of the overall structure provided for this invention.
[0011] Figure 3 This is a schematic diagram of the side of the barrier plate in contact with the bone surface provided by the present invention.
[0012] Explanation of reference numerals in the attached drawings: 1-tension plate, 11-threaded hole, 12-cylinder fixing hole one, 2-blocking plate, 21-center hole, 22-cylinder fixing hole two, 23-protrusion, 3-tension screw, 4-steel needle, 5-cylinder. Detailed Implementation
[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0014] Example 1: like Figures 1-2 As shown, This embodiment provides a periosteal traction device, including a traction plate 1, a blocking plate 2, a traction screw 3, a steel needle 4, and a cylinder 5. The traction plate 1 has a threaded hole 11 in its center for connection with the traction screw 3. The traction plate 1 also has a cylindrical fixing hole 12. The blocking plate 2 is located below the traction plate 1, and its central hole 21 has a diameter smaller than the outer diameter of the traction screw 3, allowing only the steel needle 4 to pass through. The blocking plate 2 has a second cylindrical fixing hole 22. The cylinder 5 is disposed within the first cylindrical fixing hole 12 and the second cylindrical fixing hole 22, connecting the traction plate 1 and the blocking plate 2. This connection method ensures the relative positional stability between the traction plate 1 and the blocking plate 2, while allowing for slight elastic deformation under stress to better adapt to the bone surface. The cylinder 5 can be a steel column. After the cylinder 5 is inserted into the cylinder fixing hole 22, it can be integrally formed with the cylinder fixing hole 22, for example, by welding them into a whole. Then the tension plate 1 passes through the cylinder 5 through the fixing hole 12 and is connected to the blocking plate 2.
[0015] like Figure 3 As shown, the surface of the baffle plate 2 that contacts the bone has multiple protrusions 23, forming a limited contact surface, reducing the contact area with the bone, thereby reducing bone irritation and pain.
[0016] During the surgery, a small incision is first made in the skin to expose the periosteum, and another small incision is made there. A periosteal elevator is used to separate the periosteum from the bone surface. The assembled distraction plate 1 and the blocking plate 2 (connected by a cylinder 5) are inserted under the periosteum, and a steel needle 4 is drilled into the bone through the central hole 21 for fixation. Subsequently, a hollow distraction screw 3 is screwed into the tail end of the steel needle 4, fixing it in the threaded hole 11 of the distraction plate 1. During distraction, the blocking plate 2 remains coaxial with the distraction plate 1, bearing the pressure transmitted by the distraction screw 3, effectively preventing direct damage to the bone.
[0017] Example 2: In another preferred embodiment of the present invention, the distraction plate 1 is a long strip steel plate with two or more threaded holes 11 and corresponding cylindrical fixing holes 12 spaced apart along its length. Each threaded hole 11 has a corresponding independent blocking plate 2 below it, and each blocking plate 2 is connected to the distraction plate 1 via a cylinder 5. This embodiment is suitable for cases requiring distraction of long bone segments. During surgery, multiple steel needles 4 can be inserted sequentially, passing through the central holes 21 of each blocking plate 2 for initial fixation, and then a corresponding number of distraction screws 3 are screwed in. The multiple blocking plates 2 working together can more evenly distribute the distraction tension along the long axis of the bone, further optimizing the protection of the bone and expanding the treatment range.
[0018] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A periosteal traction device, characterized in that, include The tension plate (1) has a threaded hole (11) and a cylindrical fixing hole (12) in the center. At least one baffle plate (2) is located below the tension plate (1), and has a central hole (21) and a cylindrical fixing hole (22) in the center. The tension screw (3) is a hollow screw used to screw into the threaded hole (11) along the steel needle (4); A steel needle (4) is used to pass through the central hole (21) and drill into the bone for fixation; The diameter of the central hole (21) is smaller than the outer diameter of the tension screw (3) so that the steel needle (4) can pass through.
2. The periosteal traction device as described in claim 1, characterized in that, An integrally formed cylinder (5) is provided inside the second cylindrical fixing hole (22). The tension plate (1) passes through the cylinder (5) through the first fixing hole (12) and is connected to the blocking plate (2).
3. The periosteal traction device as described in claim 1, characterized in that, The surface of the baffle plate (2) that contacts the bone has multiple protrusions (23).