Tibia far-end rear side dissection locking plate

Abstract

The utility model belongs to the technical field of bone setting, and discloses a tibia far-end rear side dissection locking plate which comprises a bone setting plate head and a bone setting plate rod, the near end of the bone setting plate rod and the bone setting plate head are integrally formed, the shape of the bone setting plate head is matched with that of a bone on the tibia far-end rear side, and the bone setting plate head is attached to the bone on the tibia far-end rear side. The near end of the bone fracture plate rod part is circumferentially twisted along the length direction of the bone fracture plate rod part from the far end of the bone fracture plate rod part, so that the bone fracture plate rod part is matched with the shape of a tibia backbone. The tibia far-end rear side dissection locking plate is lengthened, the bone fracture plate head is attached to the bone on the tibia far-end rear side, the near end of the bone fracture plate rod is attached to the inner bone face on the rear side of the tibia backbone, and the far end of the bone fracture plate rod is close to the outer side of the tibia to be attached due to torsion of the bone fracture plate rod. The tibia far-end rear side fracture is admitted from the far-end rear outer side, and the tibia backbone fracture is admitted from the weak position of the rear inner side muscle soft tissue, so that the tibia far-end rear side fracture and the tibia backbone are fixed at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of bone setting, in particular to an anatomical locking plate at the posterior distal end of the tibia. Background Art

[0002] Posterior distal tibial fracture is an intra-articular fracture of the distal tibia, which is prone to complications such as skin and soft tissue necrosis and traumatic arthritis. The injury mechanism includes two aspects: vertical violence and torsional violence. Vertical violence is the main factor. Therefore, when a posterior tibial column fracture occurs, it is often accompanied by a tibial shaft fracture.

[0003] Existing, for example, the Chinese invention patent with application number 201710702540.8 discloses an anatomical posterolateral locking plate for the distal tibia. The plate is relatively short. If the fracture of the posterior tibial column involves a fracture of the tibial shaft, the fracture of the distal posterior tibia and the fracture of the middle or even upper middle end of the tibial shaft need to be fixed separately, resulting in more complicated surgical steps, more and larger incisions, and increased risk of bone nonunion.

[0004] Therefore, it is urgent to design a new anatomical locking plate for the posterior distal tibia to improve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an anatomical locking plate for the posterior distal tibia to solve the technical problem that when the posterior distal tibia fracture is fractured with the middle part or even the upper middle part of the tibial shaft, the bone plates need to be fixed separately, which makes the surgical steps more complicated, the incisions are more numerous and larger, and the risk of bone nonunion is increased.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Distal Posterior Tibia Anatomical Locking Plate, including:

[0008] Plate head; and

[0009] A bone plate rod, one end of the bone plate rod is the proximal end and the other end is the distal end, the proximal end of the bone plate rod is integrally formed with the bone plate head, the shape of the bone plate head matches and fits with the shape of the bone on the posterior side of the distal end of the tibia, and the proximal end of the bone plate rod is circumferentially twisted from the distal end of the bone plate rod along the length direction of the bone plate rod to match the shape of the bone plate rod with the tibial shaft.

[0010] As a preferred solution of the distal posterior tibial anatomical locking plate, the proximal end of the plate stem is provided with a plurality of first locking holes spaced along its length;

[0011] The distal end of the bone plate rod is provided with a plurality of second locking holes at intervals along the length direction thereof.

[0012] As a preferred embodiment of the anatomical locking plate for the posterior distal tibia, the included angle between the axial direction of each first locking hole and the end surface of the plate stem is α, and the angle α is 20° to 40°;

[0013] The included angle between the axial direction of each second locking hole and the end surface of the bone plate rod is β, and the angle β is 20° to 40°.

[0014] As a preferred solution of the distal posterior tibia anatomical locking plate, the head of the bone plate is provided with a plurality of screw holes, the plurality of screw holes are arranged in a plurality of rows and each row is provided with a plurality of screw holes.

[0015] As a preferred solution of the distal posterior tibia anatomical locking plate, there are five screw holes, which are arranged in double rows.

[0016] As a preferred solution of the distal posterior tibial anatomical locking plate, a first pressure hole is opened at the proximal end of the plate stem;

[0017] A second pressurizing hole is formed at the distal end of the bone plate rod.

[0018] As a preferred solution of the distal posterior tibial anatomical locking plate, the first pressurizing hole and the second pressurizing hole are waist-shaped groove structures.

[0019] As a preferred solution of the distal tibia posterior anatomical locking plate, at least two first pressurizing holes are provided.

[0020] As a preferred solution of the distal posterior tibial anatomical locking plate, the head of the bone plate is provided with a first positioning hole;

[0021] A second positioning hole is formed at the distal end of the bone plate rod.

[0022] As a preferred solution of the anatomical locking plate for the posterior distal tibia, the edge of the plate head is set with a low notch;

[0023] The distal end of the bone plate rod is configured as a low-profile arrangement.

[0024] Beneficial effects of the utility model:

[0025] By lengthening the anatomical locking plate on the posterior distal tibia, the plate head maintains contact with the bone on the posterior distal tibia, while the proximal end of the plate stem aligns with the medial surface of the posterior tibial shaft. Twisting of the plate stem causes the distal end of the plate stem to deflect toward the lateral tibia, maintaining contact. Distal posterior tibial fractures are treated through a posterolateral approach, while tibial shaft fractures are treated through a posteromedial approach, where the muscles and soft tissue are weaker. This allows for simultaneous fixation of the distal posterior tibial fracture and the tibial shaft, reducing surgical steps, incision size, and the risk of nonunion. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 1 is a front view of a distal tibia posterior anatomical locking plate provided by an embodiment of the present invention;

[0027] Figure 2 is a side view from a first perspective of a distal tibia posterior anatomical locking plate provided by an embodiment of the present invention;

[0028] Figure 3 is a side view from a second perspective of the distal tibia posterior anatomical locking plate provided by an embodiment of the present invention;

[0029] Figure 4 This is a schematic structural diagram of the anatomical locking plate of the distal posterior tibia provided by an embodiment of the present invention, which is arranged on the bone at the distal posterior tibia.

[0030] In the picture:

[0031] 1. Plate head; 11. Screw hole; 12. First positioning hole;

[0032] 2. Bone plate rod; 21. First locking hole; 22. Second locking hole; 23. First pressurizing hole; 24. Second pressurizing hole; 25. Second positioning hole. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] Combine Figure 1-Figure 4 As shown, this embodiment provides an anatomical locking plate for the posterior distal tibia, which includes a plate head 1 and a plate rod 2, one end of the plate rod 2 is the proximal end and the other end is the distal end, the proximal end of the plate rod 2 is integrally formed with the plate head 1, the shape of the plate head 1 matches and fits the shape of the bone on the posterior side of the distal tibia, and the proximal end of the plate rod 2 is circumferentially twisted from the distal end of the plate rod 2 along the length direction of the plate rod 2 to match the shape of the tibial shaft.

[0038] By lengthening the anatomical locking plate on the posterior distal tibia, the plate head 1 is aligned with the bone on the posterior distal tibia, and the proximal end of the plate stem 2 is aligned with the inner bone surface of the posterior tibial shaft. The torsion of the plate stem 2 causes the distal end of the plate stem 2 to deviate toward the inner and outer sides of the tibia (fibula side) and maintain alignment. Distal posterior tibial fractures are treated through the distal posterolateral approach, while tibial shaft fractures are treated through the posteromedial approach, where the muscles and soft tissue are weaker. This allows for simultaneous fixation of the distal posterior tibial fracture and the tibial shaft, reducing surgical steps, the size of the incision, and the risk of bone nonunion.

[0039] Among them, in order to reduce the irritation of soft tissues, such as Figure 1 and Figure 2 As shown, the edge of the bone plate head 1 of this embodiment is set with a low profile, and the distal end of the bone plate rod 2 is also set with a low profile.

[0040] It should be noted that the low-profile setting mentioned in this embodiment refers to a low-profile plate and nail system, which is an internal fixation device used in orthopedic surgery, mainly used to repair and stabilize fractures. This system is characterized by a low-profile (or low-profile) design, which aims to reduce irritation to the skin and soft tissue after surgery and improve patient comfort and recovery effects.

[0041] Specifically, if Figure 1 As shown, the width of the plate head 1 is 20mm to 30mm, 20mm in this embodiment, and 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm or 30mm in other embodiments, which is not specifically limited in this embodiment. The plate head 1 can cover the entire posterior distal tibia bone. A plurality of screw holes 11 are provided on the plate head 1. Preferably, there are five screw holes 11 in this embodiment, and the five screw holes 11 are arranged in two rows, that is, there are two screw holes 11 in the first row and three screw holes 11 in the second row. The two screw holes 11 in the first row and the three screw holes 11 in the second row are staggered, thereby forming a bamboo raft effect, which can not only increase the number of bone blocks to be grasped, but also provide a firm grasping effect and better stability.

[0042] In other embodiments, the number of rows of screw holes 11 may be three, four or even more rows, and the number of screw holes 11 in each row may be one, two, three or even more, which is not limited in this embodiment.

[0043] Furthermore, if Figure 1 and Figure 2 As shown, the proximal end of the plate rod 2 is provided with a plurality of first locking holes 21 spaced apart along its length direction, and in this embodiment, there are five first locking holes 21. The distal end of the plate rod 2 is provided with a plurality of second locking holes 22 spaced apart along its length direction, and in this embodiment, there are eight second locking holes 22.

[0044] In addition, if Figure 3 As shown, the axial angle between each of the first locking holes 21 and the end face of the bone plate rod 2 is α, and the angle of α is 20°~40°, and the axial angle between each of the second locking holes 22 and the end face of the bone plate rod 2 is β, and the angle of β is 20°~40°. In this embodiment, α is 20° and β is also 20°. In other embodiments, it can also be 25°, 30°, 35° or 40°, etc., which makes it easy to lock the screw into the first locking hole 21 and the second locking hole 22 from the posterior and lateral sides, reducing damage to the Achilles tendon and ligaments, avoiding the thicker muscle groups in the calf, and increasing the accuracy of fixation and the convenience of surgical operation.

[0045] In addition to the locking hole, a first pressure hole 23 is provided at the proximal end of the plate rod 2, and a second pressure hole 24 is provided at the distal end of the plate rod 2. The first pressure hole 23 is mixed in the multiple first locking holes 21, and the second pressure hole 24 is mixed in the multiple second locking holes 22, and preferably the second hole close to the distal end and the second hole close to the proximal end. The pressure holes are waist-shaped groove structures for easy adjustment. There are at least two first pressure holes 23, and the double-hole design facilitates fine-tuning of the position of the plate rod 2 during surgery.

[0046] Optionally, a first positioning hole 12 is provided in the head portion 1 of the bone plate. In this embodiment, two first positioning holes 12 are provided, and a second positioning hole 25 is provided at the distal end of the bone plate rod 2. Both the first positioning hole 12 and the second positioning hole 25 are Kirschner wire holes, which facilitate temporary fixation of the anatomical locking plate on the posterior side of the distal tibia before installing the screws during surgery.

[0047] In other embodiments, the number of the first locking hole 21 , the second locking hole 22 , the first positioning hole 12 and the second positioning hole 25 can be set according to needs, and this embodiment does not specifically limit this.

[0048] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. 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 claims of the present invention.

Claims

1. Distal tibia posterior anatomical locking plate, characterized by: include: Plate head (1); as well as A bone plate rod (2), one end of the bone plate rod (2) is a proximal end and the other end is a distal end, the proximal end of the bone plate rod (2) is integrally formed with the bone plate head (1), the shape of the bone plate head (1) matches and fits the shape of the bone on the posterior side of the distal end of the tibia, and the proximal end of the bone plate rod (2) is circumferentially twisted from the distal end of the bone plate rod (2) along the length direction of the bone plate rod (2) to match the shape of the bone plate rod (2) with the tibial shaft.

2. The distal tibia posterior anatomical locking plate according to claim 1, characterized in that: The proximal end of the bone plate rod (2) is provided with a plurality of first locking holes (21) at intervals along its length direction; The distal end of the bone plate rod (2) is provided with a plurality of second locking holes (22) at intervals along its length direction.

3. The distal tibia posterior anatomical locking plate according to claim 2, wherein: The included angle between the axial direction of each first locking hole (21) and the end surface of the bone plate rod (2) is α, and the angle α is 20° to 40°; The included angle between the axial direction of each second locking hole (22) and the end face of the bone plate rod (2) is β, and the angle β is 20° to 40°.

4. The distal tibia posterior anatomical locking plate according to any one of claims 1 to 3, characterized in that: The bone plate head (1) is provided with a plurality of screw holes (11), and the plurality of screw holes (11) are arranged in a plurality of rows, with each row being provided with a plurality of screw holes (11).

5. The distal tibia posterior anatomical locking plate according to claim 4, characterized in that: There are five screw holes (11), and the five screw holes (11) are arranged in double rows.

6. The distal tibia posterior anatomical locking plate according to any one of claims 1 to 3, characterized in that: A first pressure hole (23) is provided at the proximal end of the bone plate rod (2); A second pressure hole (24) is provided at the distal end of the bone plate rod (2).

7. The distal tibia posterior anatomical locking plate according to claim 6, wherein: The first pressurizing hole (23) and the second pressurizing hole (24) are waist-shaped groove structures.

8. The distal tibia posterior anatomical locking plate according to claim 6, wherein: At least two first pressure holes (23) are provided.

9. The distal tibia posterior anatomical locking plate according to any one of claims 1 to 3, characterized in that: The bone plate head (1) is provided with a first positioning hole (12); A second positioning hole (25) is provided at the distal end of the bone plate rod (2).

10. The distal tibia posterior anatomical locking plate according to any one of claims 1 to 3, characterized in that: The edge of the bone plate head (1) is set with a low notch; The distal end of the bone plate rod (2) is configured as a low-profile arrangement.

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