Medial patellofemoral ligament reconstruction patella end v-shaped tunnel 3d guide positioning device

Abstract

The utility model discloses a kind of medial patellofemoral ligament reconstruction patella end V-shaped bone tunnel 3D guide plate positioner, comprising: positioning template, positioning template is matched with the shape of medial patellar margin by Boolean operation, can be closely attached to patella surface;Positioning guide sleeve, two groups are provided to positioning guide sleeve, two groups of positioning guide sleeve are fixed on the outer side of positioning template with V-shaped structure, and positioning guide sleeve passes through positioning template;Among them, positioning guide sleeve is cylindrical, for guiding surgical instrument into predetermined position, ensure the accuracy of surgical operation.The personalized guide plate positioner prepared by 3D printing technology can be perfectly attached to the patella of the patient, ensuring that the surgical instrument can accurately enter the predetermined position, greatly improving the accuracy of the operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a 3D guide plate positioner for a V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction. Background Technology

[0002] In the field of knee surgery, medial patellofemoral ligament (MPFL) reconstruction is an important treatment for knee joint diseases such as patellar dislocation. However, traditional surgical methods often rely on the surgeon's experience and feel when locating the MPFL attachment point to the patella, leading to problems such as inaccurate positioning and low surgical precision. These issues may not only result in poor surgical outcomes but also increase surgical risks and prolong patient recovery time.

[0003] Specifically, in traditional surgery, surgeons typically determine the attachment point of the MPFL on the patella through visual observation and manual palpation. This method is limited by the surgeon's personal experience and surgical field of vision, making it difficult to guarantee the positioning accuracy for each surgery. The limitations of traditional methods are particularly pronounced when dealing with patients with complex anatomical structures or significant individual differences.

[0004] Furthermore, traditional surgical methods can lead to greater surgical trauma and longer recovery times. Due to inaccurate positioning, surgeons may need to repeatedly adjust the position of surgical instruments, increasing surgical time and damage to surrounding tissues. This not only affects the surgical outcome but may also cause additional pain and burden to the patient.

[0005] To address the aforementioned technical issues, this study aims to develop a 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction. Utility Model Content

[0006] The purpose of this invention is to provide a 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction, in order to solve the problems existing in the prior art.

[0007] To achieve the above objectives, this utility model provides the following solution: This utility model provides a 3D guide plate locator for medial patellofemoral ligament reconstruction of the patellar end V-shaped bone tunnel, comprising: The positioning template is matched with the shape of the medial edge of the patella through Boolean operations, and can fit closely to the surface of the patella; The positioning guide sleeve is provided in two sets. The two sets of positioning guide sleeves are fixed to the outer side of the positioning template in a V-shaped structure, and the positioning guide sleeve passes through the positioning template. The positioning guide sleeve is cylindrical and is used to guide surgical instruments into a predetermined position to ensure the accuracy of the surgical operation.

[0008] According to the 3D guide plate locator for medial patellofemoral ligament reconstruction of patellar V-shaped bone tunnel provided by this utility model, the outer diameter of the positioning guide sleeve is 4mm-5mm.

[0009] According to the 3D guide plate locator for medial patellofemoral ligament reconstruction patellar V-shaped bone tunnel provided by this utility model, the length of the positioning guide sleeve is 10cm-15cm.

[0010] According to the 3D guide plate locator for medial patellofemoral ligament reconstruction of patellar V-shaped bone tunnel provided by this utility model, the positioning template is an irregular shape that matches the shape of the medial edge of the patella, and the thickness is 2mm-3mm.

[0011] According to the 3D guide plate locator for medial patellofemoral ligament reconstruction of patellar V-shaped bone tunnel provided by this utility model, the area of ​​the positioning template is 1cm×2cm.

[0012] According to the 3D guide plate locator for medial patellofemoral ligament reconstruction of patellar V-shaped bone tunnel provided by this utility model, the inner diameter of the positioning guide sleeve is 3mm-3.5mm.

[0013] The present invention discloses the following technical effects: 1) The personalized guide plate locator, prepared by 3D printing technology, can perfectly fit the patient's patella, ensuring that surgical instruments can accurately enter the predetermined position, greatly improving the precision of the operation.

[0014] 2) Because the surgical positioning is accurate, doctors can reduce damage to surrounding tissues during the operation, thereby reducing surgical trauma and promoting postoperative recovery for patients.

[0015] 3) The use of 3D guide plate positioners can reduce the time doctors spend exploring and adjusting during the operation, thereby shortening the operation time and improving the efficiency of the operation.

[0016] 4) Precise surgical positioning and reduced surgical trauma help improve the success rate of surgery and reduce the incidence of surgical complications.

[0017] 5) The device is designed to be personalized according to the patient's specific condition, which can meet the needs of different patients and achieve truly personalized treatment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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.

[0019] Figure 1This is a schematic diagram of the structure of the 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction of this utility model.

[0020] Among them, 1. positioning template; 2. positioning guide sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figure 1 This utility model provides a 3D guide plate locator for medial patellofemoral ligament reconstruction of the patellar end V-shaped bone tunnel, comprising: Positioning template 1, which matches the shape of the medial edge of the patella through Boolean operations, can closely fit the surface of the patella; Positioning guide sleeve 2, two sets of positioning guide sleeve 2 are provided, the two sets of positioning guide sleeve 2 are fixed on the outer side of the positioning template 1 in a V-shaped structure, and the positioning guide sleeve 2 passes through the positioning template 1; The positioning guide sleeve 2 is cylindrical and is used to guide surgical instruments into the predetermined position to ensure the accuracy of the surgical operation.

[0024] When using this invention, the device first needs to be customized. A 128-slice spiral CT scanner is used to continuously scan both knee joints of the patient to acquire CT data. This data is then used to perform three-dimensional reconstruction using Mimics software to obtain a precise knee joint model. On this three-dimensional model, a positioning template 1, matching the shape of the medial patellofemoral ligament (MPFL), is designed based on the anatomical location of the MPFL. Two sets of V-shaped positioning guide sleeves 2 are designed on the outer surface of the template. Using 3D printing technology, a personalized 3D guide locator is printed based on the designed locator model. During surgery, the 3D guide locator is placed on the patient's patella, ensuring a tight fit between the positioning template 1 and the medial edge of the patella. The positioning guide sleeves 2 guide the surgical instruments to their predetermined positions, ensuring the precision of the surgical operation. Because the positioning guide sleeves 2 have a V-shaped structure, they can better simulate the natural trajectory of the MPFL, improving the accuracy of the surgery. Guided by surgical instruments, the medial patellofemoral ligament is reconstructed, including the creation of the bone tunnel and fixation of the ligament. After the ligament reconstruction is completed, the 3D guide plate locator is removed, and the surgical site is treated and sutured as necessary.

[0025] The design was further optimized so that the outer diameter of the positioning guide sleeve 2 is 4mm-5mm.

[0026] The design was further optimized so that the length of the positioning guide sleeve 2 is 10cm-15cm.

[0027] The scheme was further optimized so that the positioning template 1 is an irregular shape that matches the shape of the medial edge of the patella, with a thickness of 2mm-3mm.

[0028] The design was further optimized, and the area of ​​positioning template 1 was 1cm × 2cm.

[0029] The design was further optimized so that the inner diameter of the positioning guide sleeve 2 is 3mm-3.5mm.

[0030] The fabrication method of the 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction integrates medical image processing, 3D modeling, personalized design, and 3D printing technology. The specific steps are as follows: Data collection: A 128-slice spiral CT scanner (such as SIMENSE, Germany) was used to perform continuous scans of both knee joints, with the scan range extending from 10 cm above the upper edge of the femur to 10 cm below the tibial plateau.

[0031] The acquired CT data was saved in DICOM format and imported into Mimics software for 3D reconstruction and editing to obtain an accurate knee joint model, which was then saved in STL format.

[0032] Model building: Using the model building module, a three-dimensional digital model of the knee joint was constructed in Mimics software based on the patient's CT data.

[0033] Positioner model design: The endpoint of the MPFL is determined at the midpoint of the medial border and the upper 1 / 3 of the patellar 3D model.

[0034] The positioning guide sleeve 2 and the positioning template 1 are designed using a locator model generation module (such as 3-matic Research 13.0 (x64) software). The positioning guide sleeve 2 is used to guide the surgical instruments into the predetermined position, while the positioning template 1 is matched with the shape of the medial edge of the patella through Boolean operations to ensure a tight fit.

[0035] The positioning guide sleeve 2 and the positioning template 1 are combined to form a complete positioning device model.

[0036] 3D printing parameter generation: Use the 3D printing parameter generation module to obtain the STL file of the locator model from the locator model generation module.

[0037] Import the STL file into slicing software (such as Cura Slicing), adjust the printing parameters, such as setting the wall thickness to 1.2mm and the infill rate to 50% for full support, and export the 3D printing parameters as gcode format.

[0038] 3D printing: Using a 3D printer, printing is performed based on the generated 3D printing parameters.

[0039] The printing material is a high-molecular material that meets medical standards, such as PEEK material, which is sterilized in low-temperature plasma for use in surgery.

[0040] Post-processing and quality inspection: After printing, the 3D guide plate positioner undergoes necessary post-processing, such as removing the support structure and polishing the surface.

[0041] Conduct quality inspections to ensure that the dimensional accuracy, surface smoothness, and fit of the positioner to the patella meet the design requirements.

[0042] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A 3D guide plate locator for a V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction, characterized in that, include: Positioning template (1), which matches the shape of the inner edge of the patella through Boolean operation, can fit closely to the patella surface; Positioning guide sleeve (2), the positioning guide sleeve (2) is provided in two sets, the two sets of positioning guide sleeve (2) are fixed on the outer side of the positioning template (1) in a V-shaped structure, and the positioning guide sleeve (2) passes through the positioning template (1). The positioning guide sleeve (2) is cylindrical and is used to guide surgical instruments into a predetermined position to ensure the accuracy of the surgical operation.

2. The 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction according to claim 1, characterized in that: The outer diameter of the positioning guide sleeve (2) is 4mm-5mm.

3. The 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction according to claim 1, characterized in that: The length of the positioning guide sleeve (2) is 10cm-15cm.

4. The 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction according to claim 1, characterized in that: The positioning template (1) is an irregular shape that matches the shape of the inner edge of the patella, and has a thickness of 2mm-3mm.

5. The 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction according to claim 1, characterized in that: The area of ​​the positioning template (1) is 1cm × 2cm.

6. The 3D guide plate locator for the V-shaped bone tunnel at the patellar end in medial patellofemoral ligament reconstruction according to claim 1, characterized in that: The inner diameter of the positioning guide sleeve (2) is 3mm-3.5mm.

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