Pre-fractured distal tibiofibular syndesmosis fixing screw system

Abstract

The invention discloses a pre-fractured distal tibiofibular syndesmosis fixing screw system, and relates to the technical field of medical instruments. According to the pre-fracture lower tibiofibular syndesmosis fixing screw system, the pre-tensioning suture rings are connected to the tibia piece and the fibula piece, when a patient begins to bear loads, the tibia piece and the fibula piece of an implant can be safely disengaged in a net space, and the internal pre-tensioning suture rings will be connected to allow dynamic movement; the pre-tensioning suture ring and the thermoplastic polyurethane cushion pad are combined, saccharification movement and fibula rotation up to 3.5 mm are allowed to be achieved in a semi-constraint mode, the implant separation notch is provided with a round edge, internal suture lines and native bones in a clear space can be protected, the situation that a ligament combination screw may be broken or loosened or causes ligament combination pain is avoided, and the ligament combination screw is suitable for being used for a patient. And the fracture position of the screw cannot be predicted, and some fractures can cause erosion of adjacent bones to cause bone dissolution, so that pain and difficulty in removal are caused, and the practicability and the flexibility of the device are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a pre-fractured tibiofibular syndesmotic fixation screw system. Background Art

[0002] The existing pre-fractured tibiofibular syndesmotic fixation screw system still has the following disadvantages in actual use:

[0003] Syndesmotic ligament injuries associated with tibiofibular fractures are relatively common in orthopedics. Approximately 20% of ankle injuries require implants to promote soft tissue healing. Currently, the most commonly used treatment method is fixation with screws, which carries certain risks. Once the patient begins to bear weight after surgery, traditional syndesmotic screws may break, loosen, or cause syndesmotic pain. Although broken and loose screws have been shown to improve patient outcomes compared to intact syndesmotic screws, the location of screw fractures may be unpredictable, and some fractures can lead to erosion of adjacent bones, causing osteolysis, leading to pain and difficulty in removal. Summary of the invention

[0004] The purpose of the present invention is to provide a pre-broken syndesmotic fixation screw system to solve the problem that traditional syndesmotic screws may break, loosen or cause syndesmotic pain; although broken and loose screws have been shown to improve patient treatment outcomes compared to intact syndesmotic screws, the location of the screw break may be unpredictable, and some breaks can cause erosion of adjacent bones and cause osteolysis, leading to pain and difficulty in removal.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a pre-fractured tibiofibular syndesmotic fixation screw system, comprising a tibia component, one end of which is connected to a fibula component, the tibia component and the fibula component are fixed at the injured ankle joint, the tibia component and the fibula component are connected with a pre-tensioning suture ring, and the pre-tensioning suture ring is connected with a buffer pad.

[0006] Further, the tibia component and the fibula component are fixedly connected, wherein the tibia component and the fibula component are allowed to break during use.

[0007] Furthermore, circular grooves are provided in the tibia component and the fibula component, and two ends of the pre-tensioning suture ring are respectively connected to the circular grooves provided in the tibia component and the fibula component.

[0008] Furthermore, the buffer pad is sleeved on the pre-tensioning suture ring, and the buffer pad is clamped in a circular groove opened in the tibia component.

[0009] Furthermore, the buffer pad is made of thermoplastic polyurethane.

[0010] Compared with the prior art, the pre-fractured tibiofibular syndesmotic fixation screw system provided by the present invention has the following beneficial effects:

[0011] The pre-fractured tibiofibular syndesmotic fixation screw system connects pre-tensioned suture rings to the tibia and fibula. When the patient begins to bear weight, the tibia and fibula of the implant can be safely detached in the clear space. The internal pre-tensioned suture ring will engage to allow dynamic movement. The combination of the pre-tensioned suture ring and the thermoplastic polyurethane cushion allows up to 3.5 mm of sacral movement and fibula rotation in a semi-constrained manner. The implant detachment groove has a rounded edge to protect the internal sutures and native bone in the clear space, avoiding the possibility of syndesmotic screw breakage, loosening or causing syndesmotic pain, and the unpredictable location of the screw breakage. Some breaks can cause adjacent bone erosion and osteolysis, resulting in pain and difficulty in removal, greatly increasing the practicality and flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0014] Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0015] Figure 3 It is a schematic diagram of the overall structure of the present invention from a third viewing angle;

[0016] Figure 4 It is a schematic diagram of the explosion structure of the present invention;

[0017] Figure 5 It is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 6 It is a schematic diagram of the explosion structure of the cross section of the present invention.

[0019] Description of reference numerals:

[0020] 1. Tibia component; 2. Fibula component; 3. Pre-tensioning suture ring; 4. Buffer pad. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] See also Figure 1-6 A pre-fractured tibiofibular syndesmotic fixation screw system includes a tibia component 1, one end of the tibia component 1 is connected to a fibula component 2, the tibia component 1 and the fibula component 2 are fixed at the injured ankle joint, a pre-tensioning suture ring 3 is connected between the tibia component 1 and the fibula component 2, and a buffer pad 4 is connected to the pre-tensioning suture ring 3.

[0023] The tibia 1 and the fibula 2 are fixedly connected, wherein the tibia 1 and the fibula 2 are allowed to break during use.

[0024] Circular grooves are provided in the tibia component 1 and the fibula component 2 , and two ends of the pre-tensioning suture loop 3 are connected to the circular grooves provided in the tibia component 1 and the fibula component 2 , respectively.

[0025] The buffer pad 4 is sleeved on the pre-tensioning suture ring 3 , and the buffer pad 4 is clamped in the circular groove formed in the tibia component 1 .

[0026] The cushion pad 4 is made of thermoplastic polyurethane.

[0027] By adopting the method of allowing the screw to break and actively breaking, it can still provide better dynamic fixation after breaking; when the screw breaks, the screw will break cleanly in the syndesmotic space at the incision point, and there are two notch lengths to adapt to the patient's anatomy and to adapt to the use with or without a plate;

[0028] The implant is initially rigid to allow for syndesmotic healing in the critical early postoperative period; once the patient begins weight bearing, the implant's tibial component 1 and fibular component 2 are safely disengaged in the clear space and the internal pre-tensioned suture loops engage to allow dynamic motion; the combination of the pre-tensioned suture loops 3 and the thermoplastic polyurethane (TPU) cushion 4 allows up to 3.5 mm of sacral motion and fibular rotation in a semi-constrained manner; the implant disengagement notch has rounded edges to protect the internal sutures and native bone in the clear space;

[0029] If necessary, multiple removal features allow the surgeon to remove the fibula 1 and tibia 2 via a medial or lateral approach, providing the surgeon with an implant length ranging from 40 mm to 60 mm that captures the medial cortex, with 14 mm and 17 mm notch lengths to accommodate a variety of patient anatomy, and helping to ensure safe disengagement of the two components during implantation;

[0030] It provides rigid support in the initial stage of implantation to promote the healing of the joint ligaments, automatically splits and cuts after weight bearing, and continues to maintain dynamic fixation through the internal pre-tensioned suture ring 3.

[0031] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pre-fractured tibiofibular syndesmotic fixation screw system, characterized in that: The invention comprises a tibia component (1), one end of which is connected to a fibula component (2), the tibia component (1) and the fibula component (2) are fixed to the injured part of the ankle joint, a pre-tensioning suture ring (3) is connected between the tibia component (1) and the fibula component (2), and a buffer pad (4) is connected to the pre-tensioning suture ring (3).

2. A pre-fractured tibiofibular syndesmotic fixation screw system according to claim 1, characterized in that: The tibia component (1) and the fibula component (2) are fixedly connected, wherein the tibia component (1) and the fibula component (2) are allowed to break during use.

3. The pre-fractured tibiofibular syndesmotic fixation screw system according to claim 1, characterized in that: The tibia component (1) and the fibula component (2) are provided with circular grooves, and the two ends of the pre-tensioning suture ring (3) are respectively connected to the circular grooves provided in the tibia component (1) and the fibula component (2).

4. The pre-fractured tibiofibular syndesmotic fixation screw system according to claim 1, characterized in that: The buffer pad (4) is sleeved on the pre-tensioning suture ring (3), and the buffer pad (4) is clamped in a circular groove provided on the tibia component (1).

5. The pre-fractured tibiofibular syndesmotic fixation screw system according to claim 1, characterized in that: The buffer pad (4) is made of thermoplastic polyurethane.

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