Universal locking steel plate for tibial plateau anterior medial fracture

Abstract

The invention discloses a universal locking steel plate for tibial plateau anterior medial fracture, and belongs to the field of orthopedic medical instruments. The steel plate comprises a near-end head part, a curved surface connecting part and a far-end straight surface part which are sequentially connected from top to bottom; the near-end head part comprises an upper end plate surface and a lower end plate surface which are integrally formed; the front inner side arc-shaped part of the upper end plate surface is in a hoop shape and is used for wrapping the front inner side column of the tibial plateau; the lower end plate face is located on the lower middle portion of the upper end plate face, multi-angle fixation is achieved through double-layer gridding arrangement, and the problems that in the prior art, the operation risk is high, and fixation is not firm are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of orthopedic medical devices, and in particular to a universal locking steel plate for treating anteromedial tibial plateau fractures. Background Art

[0002] Tibial plateau fractures are a common type of intra-articular fracture in clinical practice. Among them, anteromedial compression fractures caused by hyperextension and varus injury are particularly complex to treat. Currently, the most common clinical method is to fix the medial tibial plateau with an anteriorly placed locking plate (see patent CN201510123456.7 "Medial Tibial Plateau Locking Plate"). However, this method has significant drawbacks:

[0003] Limited screw fixation angle: Traditional locking screws cannot be fixed perpendicular to the fracture line, resulting in insufficient mechanical stability (Smith et al., JOrthopTrauma, 2018);

[0004] Patellar ligament interference: The plate position conflicts with the anatomy of the patellar ligament, affecting intraoperative procedures and postoperative functional recovery (Zhang et al., Injury, 2020).

[0005] Poor multi-column fixation ability: It cannot cover both the anterior medial column and posterior column fractures at the same time and requires combination with other internal fixations (patent CN201810987654.3 “Tibial plateau posterior column fixation device”).

[0006] Furthermore, existing technologies, such as the distal radius universal locking plate (patent US2017123456A1), offer screw angle adjustment, but their structure is not adapted to the anatomy of the anteromedial tibial plateau and cannot be directly applied. Therefore, a new plate with anatomical conformability, multi-directional locking, and multi-column fixation is urgently needed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a universal locking steel plate for anteromedial tibial plateau fractures, thereby solving the problems of weak fixation and high surgical risk in the prior art.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] The present invention discloses a universal locking steel plate for treating anterior medial tibial plateau fractures, comprising a proximal head, a curved surface connecting portion and a distal straight surface portion, which are sequentially connected from top to bottom;

[0010] The proximal head comprises an upper end plate and a lower end plate formed in one piece;

[0011] The anterior medial arcuate portion of the upper end plate surface is in a hoop shape and is used to wrap around the anterior medial column of the tibial plateau;

[0012] The lower end plate surface is located at the lower middle part of the upper end plate surface.

[0013] Further explanation: the front inner arc portion of the upper end plate is provided with a row of several 2.7mm first universal locking screw holes, and the central axis direction of each screw hole has 30 degrees of freedom;

[0014] The lower end plate is also provided with a row of several 2.7mm second universal locking screw holes;

[0015] The distal straight surface portion is provided with a plurality of 3.5 mm locking screw holes.

[0016] It is further explained that the screw angle of the universal locking screw hole can be adjusted within a range of ±15° to accommodate different fracture line directions.

[0017] It is further explained that the first universal locking screws passing through the first universal locking screw holes and the second universal locking screws passing through the second universal locking screw holes are arranged alternately to form a double-layer fixing network.

[0018] It is further explained that the steel plate can simultaneously fix the anterior medial column and the posterior column fracture fragments, and the posterior column fixation is achieved by extending the tail end of the steel plate at the proximal head.

[0019] It is further explained that the steel plate is made of titanium alloy, has a thickness of 2.0-2.5 mm, and its surface is sandblasted to enhance bone integration.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Compared with traditional tibial plateau internal fixation technology, the universal locking steel plate of the present invention has the following significant advantages:

[0022] 1. The proximal body design is highly compatible with the anatomy of the anteromedial tibial plateau, avoiding interference with the patellar ligament, reducing the need for soft tissue dissection during surgery, and minimizing trauma.

[0023] 2. The proximal 2.7mm universal screw hole provides ±15° angle adjustment (such as the extended application of patent US2017123456A1), so that the screw can be fixed perpendicular to the fracture line and improve the ability to resist shear force.

[0024] 3. Through the grid arrangement of distal 3.5mm screws and proximal universal screws (see attached Figure 3 ), achieving synchronous stabilization of the anteromedial column and posterior column and avoiding secondary surgery.

[0025] 4. The universal screw hole design allows the surgeon to dynamically adjust the screw angle according to the displacement direction of the fracture fragment, which is especially suitable for complex hyperextension and varus fractures.

[0026] In addition, the "hoop plating" top structure of this steel plate further wraps the fracture fragment to prevent rotation and displacement. Its titanium alloy material and sandblasted surface treatment promote bone ingrowth and shorten the healing period.

[0027] In summary, the present invention is significantly superior to the existing technology in terms of anatomical adaptability, mechanical properties and clinical applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0029] Figure 1 : Schematic diagram of the universal locking plate for anteromedial tibial plateau fractures fitted to the anteromedial column of the plateau;

[0030] Figure 2 : Schematic diagram of the product structure of the present invention.

[0031] Figure 3 : Schematic diagram of grid screw arrangement and posterior column fixation.

[0032] In the figure: 1. Locking screw hole; 2. Distal straight surface; 3. Locking screw; 4. Curved connection part; 5. Second universal locking screw; 6. First universal locking screw hole; 7. First universal locking screw; 8. Second universal locking screw hole; 9. Proximal head; Upper end plate surface 10; Lower end plate surface 11. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1-3 As shown, the universal locking steel plate for anteromedial tibial plateau fractures includes a proximal head 9, a curved connecting portion 4 and a distal straight surface portion 2 connected in sequence from top to bottom; the proximal head 9 includes an upper end plate surface 10 and a lower end plate surface 11 formed in one piece; the anterior medial arc portion of the upper end plate surface 10 is hoop-shaped, used to wrap around the anterior medial column of the tibial plateau; the lower end plate surface 11 is located in the lower middle part of the upper end plate surface 10.

[0039] Specifically, the anterior inner arc portion of the upper end plate surface 10 is provided with a row of several 2.7mm first universal locking screw holes 6, and each screw hole has 30° freedom in the axial direction; and the lower end plate surface 11 is also provided with a row of several 2.7mm second universal locking screw holes 8; the distal straight surface portion 2 is provided with multiple 3.5mm locking screw holes 1, and is also provided with locking screws 2 passing through the locking screw holes 1 to be fixed on the column fracture fragment.

[0040] In actual operation, the screw angle of the universal locking screw hole can be adjusted within a range of ±15° to accommodate different fracture line directions.

[0041] Please refer to Figure 3 The first universal locking screws 7 passing through the first universal locking screw holes 6 and the second universal locking screws 5 passing through the second universal locking screw holes 8 are arranged alternately to form a double-layer fixing network.

[0042] Please refer to Figure 1 、 2 The steel plate can simultaneously fix the anterior medial column and posterior column fracture fragments, and the posterior column fixation is achieved by extending the tail end of the steel plate at the proximal head 9.

[0043] In actual operation, the steel plate is made of titanium alloy, with a thickness of 2.0-2.5mm, and the surface is sandblasted to enhance bone integration.

[0044] Specifically, the proximal head 9 is constructed from a 2.3mm thick titanium alloy plate with a radius that matches the anatomical curvature of the anteromedial tibial plateau. The proximal head 9 features linearly arranged universal locking screw holes with a diameter of 2.7mm. Multi-directional slots within the holes allow screw adjustment within a 30° tapered range. The distal straight face also features two locking screw holes. These 3.5mm holes are staggered with the proximal head 9 holes, with the screws oriented perpendicular to the bone surface.

[0045] The structure of this application works as follows:

[0046] During surgery, the main body length is selected based on the extent of the fracture, and the curved main body is attached to the anteromedial aspect of the tibial plateau. A 2.7mm screw is inserted through the universal screw hole, and the angle is adjusted to be perpendicular to the fracture line to secure the anteromedial compressed bone fragment. A distal 3.5mm screw is driven into the tibial shaft through the locking hole, forming a cross-support with the proximal screw. If a posterior column fracture is present, an extended tail is installed and the posterior bone fragment is secured through an additional screw hole. This design achieves three-dimensional stability through "grid fixation" and "angle adaptation" mechanisms, making it suitable for complex tibial plateau fractures.

[0047] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A universal locking steel plate for anteromedial tibial plateau fractures, characterized in that: It includes a proximal head, a curved connecting portion and a distal straight surface portion connected in sequence from top to bottom; The proximal head comprises an upper end plate and a lower end plate formed in one piece; The anterior medial arcuate portion of the upper end plate surface is in a hoop shape and is used to wrap around the anterior medial column of the tibial plateau; The lower end plate surface is located at the lower middle part of the upper end plate surface.

2. The steel plate according to claim 1, wherein The front inner arc portion of the upper end plate is provided with a row of several 2.7mm first universal locking screw holes, and the central axis direction of each screw hole has a 30° degree of freedom; The lower end plate is also provided with a row of several 2.7mm second universal locking screw holes; The distal straight surface portion is provided with a plurality of 3.5 mm locking screw holes.

3. The steel plate according to claim 2, characterized in that The screw angle of the universal locking screw hole can be adjusted within a range of ±15° to accommodate different fracture line directions.

4. The steel plate according to claim 1, wherein The first universal locking screws passing through the first universal locking screw holes and the second universal locking screws passing through the second universal locking screw holes are arranged alternately to form a double-layer fixing network.

5. The steel plate according to claim 1, wherein The steel plate can simultaneously fix the anterior medial column and posterior column fracture fragments, and the posterior column fixation is achieved by extending the tail end of the steel plate at the proximal head.

6. The steel plate according to any one of claims 1 to 5, characterized in that: The steel plate is made of titanium alloy, has a thickness of 2.0-2.5 mm, and is sandblasted on the surface to enhance bone integration.

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