An auxiliary device for reconstruction of proximal humerus fracture of shoulder joint

Abstract

The utility model discloses a kind of for shoulder joint proximal humerus fracture reconstruction auxiliary instrument, including main installation component, several adjusting components are provided on the main installation component, humeral clamping component is provided on the one side of the main installation component, auxiliary connecting component is provided on the side away from humeral clamping component of the main installation component, fracture handle installation component is provided on the auxiliary connecting component. The auxiliary instrument of this technical solution, structure design is ingenious, and practicality is stronger, and it is convenient to operate, using this auxiliary instrument can provide accurate guide for fracture handle replacement surgery, help doctor accurately determine surgical incision, drill hole position, implant placement angle etc., reduce surgical error, reduce surgical risk, improve the success rate of surgery, simultaneously, effectively shorten surgery time, reduce patient's anesthesia time and intraoperative hemorrhage, promote patient postoperative recovery, furthermore, reduce the difficulty of surgery, make some originally complex surgery become more easily implemented.

Description

Technical Field

[0001] This utility model relates to the field of assistive device technology, and in particular to an assistive device for reconstruction of proximal humeral fractures of the shoulder joint. Background Technology

[0002] Among all types of fractures, proximal humeral fractures account for 4% to 5% of all fractures, making them a relatively common upper limb fracture. Shoulder replacement surgery is the primary and effective surgical method for treating complex proximal humeral fractures. Due to the complexity and low incidence of proximal humeral fractures, and the relative lack of clinical experience in managing these fractures, patient prognosis can be poor to some extent. This condition has always been a challenge in trauma orthopedic treatment, presenting the following problems: 1. Proximal humeral fractures cause destruction of bony landmarks, making it difficult to identify the neck of the humerus. Most surgical anatomical landmarks are lost, the humeral head collapses or is missing, and the prosthesis size is uncertain, which can easily lead to limited joint mobility and difficulty in intraoperative reduction. 2. Loss or disorder of the proximal humerus anatomical structure, lack of reference points for prosthesis installation, which can easily cause intra-articular impingement or instability. The uncertainty of the prosthesis height and posterior tilt angle during surgery, and the fact that the prosthesis is too high or too low will have an adverse effect on the movement and function of the shoulder joint. Too high will cause shoulder impingement, while too low will lead to shoulder instability and postoperative pain. 3. Proximal humeral fracture, extensive scar tissue proliferation around the shoulder joint, deformity or displacement of the greater and lesser tuberosities of the humerus.

[0003] Existing assistive devices are inconvenient to operate, and using them makes the surgery more difficult, time-consuming, and risky. Therefore, it is necessary to design an assistive device for reconstruction of proximal humeral fractures of the shoulder joint. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing an auxiliary device for reconstruction of proximal humeral fractures of the shoulder joint.

[0005] To achieve the above objectives, the technical solution of this utility model is an auxiliary device for reconstruction of proximal humeral fractures of the shoulder joint, comprising a main mounting assembly, wherein a plurality of adjustment components are provided on the main mounting assembly, a humeral clamping component is provided on one side of the main mounting assembly, an auxiliary connecting component is provided on the side of the main mounting assembly away from the humeral clamping component, and a fracture handle mounting component is provided on the auxiliary connecting component.

[0006] As a further description of this technical solution, the main mounting assembly includes a main fixed upright plate, and the main fixed upright plate is provided with a plurality of adjustment components.

[0007] As a further description of this technical solution, the adjustment component includes a plurality of adjustment holes disposed on the main mounting component.

[0008] As a further description of this technical solution, the humeral clamping assembly includes a humeral clamping device disposed on one side of the main mounting assembly, and the humeral clamping device is provided with an auxiliary clamping arc groove.

[0009] As a further description of this technical solution, the auxiliary connection assembly includes an auxiliary connecting arc-shaped rod disposed on the side of the main mounting assembly away from the humeral clamping assembly, and a fracture handle mounting assembly is disposed at the end of the auxiliary connecting arc-shaped rod away from the main mounting assembly.

[0010] As a further description of this technical solution, the fracture stem mounting assembly includes a fracture stem mounting seat disposed on the auxiliary connection assembly, and the fracture stem mounting seat is provided with a limiting guide groove.

[0011] Its beneficial effects are that the auxiliary device of this technical solution has a clever structural design, is highly practical, and is easy to operate. Using this auxiliary device can provide precise guidance for fracture stem replacement surgery, help doctors accurately determine the surgical incision, drilling position, and implant placement angle, reduce surgical errors, reduce surgical risks, and improve the success rate of surgery. At the same time, it can effectively shorten the operation time, reduce the patient's anesthesia time and intraoperative bleeding, and promote the patient's postoperative recovery. In addition, it reduces the difficulty of the operation, making some originally complex operations easier to perform. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the overall structure of this utility model; Fig. 2 This is a schematic diagram of the overall structure of this utility model from another perspective; Fig. 3 This is a schematic diagram of the binding thread passing through the thread hole of the fracture stem in this utility model.

[0013] In the figure, 1. Main mounting assembly; 2. Adjustment assembly; 3. Humerus clamping assembly; 4. Auxiliary connection assembly; 5. Fracture stem mounting assembly; 6. Main fixation plate; 7. Adjustment hole; 8. Humerus clamp; 9. Auxiliary clamping arc groove; 10. Auxiliary connection arc rod; 11. Fracture stem mounting seat; 12. Limiting guide groove. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figs. 1-3 As shown, an auxiliary device for reconstruction of proximal humeral fractures of the shoulder joint includes a main mounting assembly 1. The main mounting assembly 1 will be described in detail below. The main mounting assembly 1 includes a main fixation plate 6, on which a plurality of adjustment components 2 are provided.

[0015] To facilitate adjustment of the installation position of the main mounting component 1, a number of adjustment components 2 are provided on the main mounting component 1. The adjustment components 2 will be described in detail below. The adjustment components 2 include a number of adjustment holes 7 provided on the main mounting component 1.

[0016] To facilitate clamping of the humerus, a humerus clamping assembly 3 is provided on one side of the main mounting assembly 1. The humerus clamping assembly 3 will be described in detail below. The humerus clamping assembly 3 includes a humerus clamp 8 provided on one side of the main mounting assembly 1. The humerus clamp 8 is provided with an auxiliary clamping arc groove 9.

[0017] To facilitate the installation of the fracture stem mounting assembly 5, an auxiliary connecting assembly 4 is provided on the side of the main mounting assembly 1 away from the humeral clamping assembly 3. The auxiliary connecting assembly 4 will be described in detail below. The auxiliary connecting assembly 4 includes an auxiliary connecting arc-shaped rod 10 provided on the side of the main mounting assembly 1 away from the humeral clamping assembly 3. The fracture stem mounting assembly 5 is provided at the end of the auxiliary connecting arc-shaped rod 10 away from the main mounting assembly 1.

[0018] To facilitate the installation of the fracture stem, a fracture stem mounting assembly 5 is provided on the auxiliary connecting assembly 4. The fracture stem mounting assembly 5 will be described in detail below. The fracture stem mounting assembly 5 includes a fracture stem mounting seat 11 provided on the auxiliary connecting assembly 4, and a limit guide groove 12 is provided on the fracture stem mounting seat 11.

[0019] The above details the specific structure of this utility model. The following will explain the working principle of this utility model: Since shoulder fractures of the humerus often result in the loss of most anatomical landmarks, the application of traditional hemi-shoulder joint replacement in this case has problems such as difficulty in selecting the prosthesis size and uncertainty in the prosthesis height.

[0020] 1. Measurement of shoulder anatomical parameters: Preoperatively, CT data of both humeri were collected and imported into Mimics software for 3D reconstruction to generate STL files of both humeri. Based on the images of the affected shoulder joint, the bone condition, fracture length, and medullary canal width of the affected side were initially assessed. Then, based on the mirror image of the healthy hemi-shoulder joint and the fracture extent of the affected side, the appropriate fracture stem and ball head type were selected, and auxiliary instruments for fracture stem replacement were used. 2. Selection of prosthesis type: Since the normal anatomical structure of the humeral head on the affected side has disappeared, it is impossible to accurately measure the size of the humeral head. Therefore, it is very meaningful and easy to obtain the size of the humeral head on the affected side by directly mirroring the model of the healthy side. 3. Determine the appropriate physiological and anatomical positioning of the prosthesis within the joint: Since the length of the prosthesis is determined entirely based on the morphological characteristics of the contralateral humerus as reconstructed in preoperative 3D and the osteotomy length designed for the affected side, the accuracy of the prosthesis position and the consistency of the length of the humerus of both upper limbs after surgery are ensured. 4. Design an auxiliary device for fracture stem replacement and implant the prosthesis into the fracture site: Based on data such as the length of the healthy side of the humerus, design an auxiliary device for fracture stem replacement. Install the fracture stem on the fracture stem mounting seat 11. Use the humeral clamp 8 of the auxiliary device to clamp and fix the fracture stem 13. Then, install the fracture stem 13 and the humeral head 14 in the physiological and anatomical position. Use sutures to pass through the suture hole 15 to fix the fracture stem 13 to the surrounding soft tissue to make it firm. Remove the fracture stem auxiliary device; fit it with the healthy side of the humerus and perform joint movement simulation.

[0021] This invention utilizes an auxiliary device for fracture stem replacement to guide hemiarthroplasty of the proximal humerus. The auxiliary device for fracture stem replacement is practical in treating shoulder replacements with humeral fractures and bone defects, playing a crucial role in surgical planning and execution, and offering the following advantages: 1. High degree of personalization: Every individual's anatomical structure is different, and traditional surgical instruments are often standardized, making it difficult to fully meet the specific needs of each individual. Fracture stem replacement assistive devices can accurately construct a three-dimensional model of the patient's specific area based on medical imaging data such as CT and MRI, and on this basis, design and print a navigation template that perfectly fits the patient's anatomical structure. This can better adapt to the different conditions of different patients and significantly improve the accuracy and safety of the surgery.

[0022] 2. Improved Surgical Precision: In complex surgeries, such as joint replacement and spinal surgery in orthopedics, extremely precise manipulation of the surgical site is required. Fracture stem replacement assistive devices can provide precise guidance for surgical instruments, helping doctors accurately determine the surgical incision, drilling location, and implant placement angle, reducing surgical errors, lowering surgical risks, and improving the success rate of the surgery.

[0023] 3. Reduced Surgical Time: Preoperative simulation using fracture stem replacement assistive devices allows surgeons to gain a clearer understanding of the surgical site's anatomical structure and the challenges of the procedure, enabling them to plan surgical steps and instrument usage in advance. During the actual surgery, surgeons can operate quickly and accurately based on the navigation template, reducing intraoperative exploration and adjustment time, thereby effectively shortening surgical time, minimizing anesthesia time and intraoperative bleeding, and promoting postoperative recovery.

[0024] 4. Reduced Surgical Difficulty: For some complex surgeries, such as craniofacial surgery and tumor resection, the operating space is limited and the anatomical structures are complex, requiring a high level of skill from the surgeon. Fracture stem replacement assistive devices can visually present the anatomical structures of the surgical site, providing surgeons with a clear surgical path and operational guidance, reducing the difficulty of the surgery and making some originally complex procedures easier to perform.

[0025] The auxiliary device in this technical solution has a clever structural design, is highly practical, and easy to operate. Using this auxiliary device can provide precise guidance for fracture stem replacement surgery, helping doctors accurately determine the surgical incision, drilling location, and implant placement angle, reducing surgical errors, lowering surgical risks, and improving the success rate of the surgery. At the same time, it effectively shortens the operation time, reduces the patient's anesthesia time and intraoperative bleeding, and promotes the patient's postoperative recovery. In addition, it reduces the difficulty of the surgery, making some originally complex surgeries easier to perform.

[0026] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. An auxiliary device for reconstruction of proximal humeral fractures of the shoulder joint, characterized in that, It includes a main mounting component (1), on which a plurality of adjustment components (2) are provided, on one side of the main mounting component (1) a humeral clamping component (3) is provided, on the side of the main mounting component (1) away from the humeral clamping component (3) an auxiliary connecting component (4) is provided, and on the auxiliary connecting component (4) a fracture stem mounting component (5) is provided.

2. The auxiliary device for reconstruction of proximal humeral fractures of the shoulder joint according to claim 1, characterized in that, The main mounting assembly (1) includes a main fixed plate (6), on which a plurality of adjustment components (2) are provided.

3. The auxiliary device for reconstructing proximal humeral fractures of the shoulder joint according to claim 1, characterized in that, The adjustment component (2) includes a plurality of adjustment holes (7) provided on the main mounting component (1).

4. The auxiliary device for reconstruction of proximal humeral fractures of the shoulder joint according to claim 1, characterized in that, The humeral clamping assembly (3) includes a humeral clamp (8) disposed on one side of the main mounting assembly (1), and the humeral clamp (8) is provided with an auxiliary clamping arc groove (9).

5. The auxiliary device for reconstruction of proximal humeral fractures of the shoulder joint according to claim 1, characterized in that, The auxiliary connection assembly (4) includes an auxiliary connection arc-shaped rod (10) disposed on the side of the main mounting assembly (1) away from the humeral clamping assembly (3), and a fracture stem mounting assembly (5) is disposed at the end of the auxiliary connection arc-shaped rod (10) away from the main mounting assembly (1).

6. The auxiliary device for reconstructing proximal humeral fractures of the shoulder joint according to claim 1, characterized in that, The fracture stem mounting assembly (5) includes a fracture stem mounting seat (11) disposed on the auxiliary connection assembly (4), and the fracture stem mounting seat (11) is provided with a limiting guide groove (12).

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