Humeral head replacement

Abstract

The utility model relates to medical instrument technical field discloses a kind of humeral large nodus fixing steel plate, including fixed main body, haustral structure, curved groove and reinforcing rib structure, with the profile of adaptation humeral large nodus dissection form, the haustral structure is connected with fixed main body by extension end, the fixed hole two for implanting with line screw is equipped on the haustral structure, the curved groove is set on extension end, for the bending angle of control extension end, the fixed main body of the utility model is reticulated structure, is equipped with openwork area and reinforcing rib, both reduce weight, reduce acromion impact risk, and enhance strength, promote fracture healing, the haustral structure of its setting is connected with fixed main body by extension end, curved groove is convenient for control bending angle or break haustral structure, can be flexibly adapted to different fracture conditions, can be broken by curved groove when not needing haustral structure, reduce unnecessary structural interference, reduce postoperative complication risk.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a steel plate for fixing the greater tuberosity of the humerus. Background Technology

[0002] In clinical treatment, fractures of the greater tuberosity of the humerus are often caused by violent movements such as shoulder abduction and extension, and are often accompanied by tearing of the insertion point of the rotator cuff tendon (such as the supraspinatus muscle). It is necessary to restore the bone structure and repair the tendon by fixing the plate in order to rebuild the shoulder joint function.

[0003] In the clinical treatment of greater tuberosity fractures of the humerus, traditional fixation plates have significant drawbacks: the plate structure is difficult to conform to anatomical areas such as the posterior margin of the greater tuberosity; minimally invasive implantation significantly encroaches on the subacromial space, resulting in a high risk of postoperative acromial impingement, limiting the recovery of shoulder joint function; and the plates have a single function, failing to adapt to individualized fracture morphologies (such as comminuted fractures or fractures with a surgical neck); moreover, they are mostly rigid in design, leading to a high risk of postoperative fatigue fracture, with some requiring secondary removal, increasing patient trauma. These problems manifest as poor synergy between fixation and repair, insufficient anatomical adaptation, and a single structural function, severely impacting treatment outcomes and patient prognosis. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a humeral greater tuberosity fixation plate that meets the treatment needs of complex fractures while enabling rapid adaptation to simple fracture cases, reducing unnecessary structural interference, lowering the risk of postoperative complications, and improving surgical efficiency and patient prognosis.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A fixation plate for the greater tuberosity of the humerus includes a fixation body, a loop structure, a bending groove, and a reinforcing rib structure. The plate has a contour adapted to the anatomical shape of the greater tuberosity of the humerus. The loop structure is connected to the fixation body via an extension end. The loop structure has two fixation holes for implanting suture screws. The bending groove is located on the extension end to control the bending angle of the extension end, allowing the loop structure to conform to different anatomical regions of the greater tuberosity of the humerus. The reinforcing rib structure is located on the fixation body to enhance the strength of the fixation body and reduce its weight.

[0006] Preferably, the fixing body is a mesh structure with a hollow area. The reinforcing rib structure includes reinforcing rib one and reinforcing rib two distributed between the hollow areas. The mesh structure reduces the weight of the steel plate and lowers the risk of acromion impact. At the same time, the reinforcing ribs enhance the strength and ensure long-term fixation stability. The hollow design provides space for bone fragments to be accommodated, promoting callus growth and fracture healing.

[0007] Preferably, the fixing body is provided with multiple fixing ends, and each of the multiple fixing ends is provided with a fixing hole for implanting a wire screw.

[0008] Preferably, the bending groove is an outer arc-shaped structure, and the depth of the bending groove is one-third of the thickness of the extension end. The bending groove facilitates the doctor's bending of the extension end, so that the loop structure fits the anatomical shape of the greater tubercle of the humerus, enhancing the fixation fit. When the loop structure is not needed, the bending groove facilitates the doctor's breaking of the loop structure.

[0009] Preferably, the edges of the fixation body and the loop structure are rounded to reduce frictional damage to soft tissues such as rotator cuff tendons and muscles, thereby reducing the risk of postoperative adhesions and inflammation.

[0010] Preferably, the fixing body, the extension end, and the loop structure are integrally formed. By producing them through an integral forming process, gaps between components can be eliminated, the overall strength and fatigue resistance of the steel plate can be improved, and long-term fixing reliability can be ensured.

[0011] Preferably, the plurality of fixing ends are distributed along the edge of the fixing body, which can evenly distribute the fixing stress and reduce the risk of local cortical bone compression and screw loosening.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The fixation body of this utility model has a mesh structure with hollowed-out areas and reinforcing ribs, which reduces weight and lowers the risk of acromion impingement, while also increasing strength and promoting fracture healing. The loop structure is connected to the fixation body through an extension end, and the bending groove facilitates control of the bending angle or breakage of the loop structure. It can flexibly adapt to different fracture conditions and can break the loop structure through the bending groove when it is not needed, reducing unnecessary structural interference and lowering the risk of postoperative complications. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a view showing the location of the bending groove in this utility model; Figure 3 This is a side view of the fixed body of this utility model.

[0015] Drawing number explanation: 1. Fixed body; 11. Fixed end; 12. Fixed hole one; 13. Reinforcing rib one; 14. Reinforcing rib two; 15. Hollowed-out area; 2. Extension end; 3. Loop structure; 31. Fixed hole two; 4. Bending groove. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0018] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0020] Please see Figure 1-3 A fixation plate for the greater tuberosity of the humerus includes a fixation body 1, a loop structure 3, a bending groove 4, and a reinforcing rib structure. The plate has a contour adapted to the anatomical shape of the greater tuberosity of the humerus. The loop structure 3 is connected to the fixation body 1 through an extension end 2. The loop structure 3 is provided with a fixation hole 31 for implanting a suture screw. The bending groove 4 is provided on the extension end 2 to control the bending angle of the extension end 2, so that the loop structure 3 can conform to different anatomical regions of the greater tuberosity of the humerus. The reinforcing rib structure is provided on the fixation body 1 to enhance the strength of the fixation body 1 and reduce its weight.

[0021] The fixation body 1 is a mesh structure with a hollow area 15. The reinforcing rib structure includes reinforcing rib 13 and reinforcing rib 2 14 distributed between the hollow areas 15. The mesh structure reduces the weight of the steel plate and lowers the risk of acromion impact. At the same time, the reinforcing ribs enhance the strength and ensure long-term fixation stability. The hollow design provides space for bone fragments to be contained, promoting callus growth and fracture healing.

[0022] The fixing body 1 is provided with multiple fixing ends 11, and each fixing end 11 is provided with a fixing hole 12 for implanting a screw with wire.

[0023] The bending groove 4 is an outward arc-shaped structure. The depth of the bending groove 4 is one-third of the thickness of the extension end 2. The bending groove 4 facilitates the doctor to bend the extension end 2, so that the loop structure 3 fits the anatomical shape of the greater tubercle of the humerus, enhancing the fixation fit. When the loop structure 3 is not needed, the bending groove 4 facilitates the doctor to break the loop structure 3.

[0024] The edges of both the fixation body 1 and the loop structure 3 are rounded to reduce frictional damage to soft tissues such as rotator cuff tendons and muscles, thereby reducing the risk of postoperative adhesions and inflammation.

[0025] The fixed main body 1, the extension end 2, and the loop structure 3 are integrally formed. They are produced by integral molding process, which can eliminate the gaps between the components, improve the overall strength and fatigue resistance of the steel plate, and ensure long-term fixed reliability.

[0026] Multiple fixation ends 11 are distributed along the edge of the fixation body 1, which can evenly distribute the fixation stress and reduce the risk of local cortical bone compression and screw loosening.

[0027] In actual surgical applications, the patient's greater tuberosity fracture site is first routinely disinfected and draped to expose the fracture area. The type and displacement of the fracture are determined based on preoperative imaging examinations (such as X-ray, CT, etc.), and a suitable size of the fixation plate of this invention is selected.

[0028] When a patient has a fracture of the greater tuberosity of the humerus combined with a rotator cuff injury, the fracture site is routinely disinfected and draped to expose the fracture area. Based on preoperative imaging, the fracture type and displacement are determined, and a suitable fixation plate of the present invention is selected. The fixation body 1 of the fixation plate is attached to the bone surface of the greater tuberosity of the humerus, and a suture screw is inserted through the fixation hole 12 of the fixation end 11 to fix the body 1. Using surgical instruments, the bending groove 4 on the extension end 2 is bent. According to the fracture site and the rotator cuff injury, the loop structure 3 is adjusted to a suitable angle and position. After the rotator cuff tendon is reduced, a suture screw is inserted through the fixation hole 31 on the loop structure 3 to suture and fix the rotator cuff tendon to the loop structure 3, completing the simultaneous repair of the fracture and rotator cuff. The position and fixation effect of the fixation plate are checked to ensure good reduction of the fracture fragments and firm fixation of the rotator cuff tendon. Finally, the surgical incision is routinely sutured. If the patient has a simple greater tuberosity fracture of the humerus, there is no need to use the loop structure 3 for auxiliary fixation and rotator cuff repair. After the fixation body 1 is fixed to the bone surface through fixation hole 12 and suture screws, the surgeon uses surgical instruments (such as bone scalpels, bone forceps, etc.) to apply precise external force to the bending groove 4. Utilizing the stress concentration characteristics at the bending groove 4, the loop structure 3 is broken off and removed along the bending groove 4. The fracture site is then smoothed using grinding instruments (such as bone files, electric grinders, etc.) to make the edges of the fracture smooth and flat, avoiding damage to the surrounding soft tissues. The fixation effect of the fixation plate and the condition of the surrounding tissues are checked again. After confirming that everything is correct, the surgical incision is sutured routinely.

[0029] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A steel plate for fixing the greater tuberosity of the humerus, characterized in that, Includes a fixed body (1) with an outline adapted to the anatomical shape of the greater tubercle of the humerus; The loop structure (3) is connected to the fixing body (1) through the extension end (2), and the loop structure (3) is provided with a fixing hole (31) for implanting a wire screw. A bending groove (4) is provided on the extension end (2) to control the bending angle of the extension end (2) so that the loop structure (3) can fit the different anatomical regions of the greater tubercle of the humerus. A reinforcing rib structure is provided on the fixed body (1) to enhance the strength of the fixed body (1) and reduce its weight.

2. The humeral greater tuberosity fixation plate according to claim 1, characterized in that: The fixed body (1) is a mesh structure, the mesh structure is provided with a hollow area (15), and the reinforcing rib structure includes reinforcing rib one (13) and reinforcing rib two (14) distributed between the hollow area (15).

3. The humeral greater tuberosity fixation plate according to claim 2, characterized in that: The fixing body (1) is provided with multiple fixing ends (11), and each of the multiple fixing ends (11) is provided with a fixing hole (12) for implanting a wire screw.

4. The humeral greater tuberosity fixation plate according to claim 3, characterized in that: The bending groove (4) has an outer arc-shaped structure, and the depth of the bending groove (4) is one-third of the thickness of the extension end (2).

5. A humeral greater tuberosity fixation plate according to claim 4, characterized in that: The edges of the fixed body (1) and the loop structure (3) are both rounded.

6. The humeral greater tuberosity fixation plate according to claim 5, characterized in that: The fixed body (1), the extension end (2) and the loop structure (3) are integrally formed.

7. A humeral greater tuberosity fixation plate according to claim 6, characterized in that: Multiple fixed ends (11) are distributed along the edge of the fixed body (1).

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