System for correcting deformity of old distal radius fracture by relay guide plate

Abstract

The application discloses a system for orthopedic treatment of old distal radius fracture deformity through a relay guide plate, relates to the technical field of bone deformity correction, and aims to solve the technical problem that traditional open reduction and internal fixation surgery relies on the experience of doctors to plan a surgical path and is prone to risks caused by subjective judgment deviation, and comprises an old fracture special analysis unit and an old callus deformity adaptive adjustment unit. Through a deformity quantitative analysis unit and a callus feature evaluation unit in the old fracture special analysis unit, the application realizes accurate analysis of fracture deformity parameters and callus features. This preoperative planning method based on accurate data analysis effectively avoids the planning errors caused by the experience of doctors in traditional surgery, significantly improves the scientificity and accuracy of surgical planning, and solves the problem that current traditional open reduction and internal fixation surgery relies on the experience of doctors to plan.

Description

Technical Field

[0001] This invention relates to the field of skeletal deformity correction technology, and more specifically, to a system for correcting old distal radius fracture deformities using a relay guide plate. Background Technology

[0002] In the field of skeletal deformity correction, the treatment of old distal radius fracture deformities has always been a challenging issue in clinical practice. Distal radius fractures are a common type of fracture, and if due to improper early treatment, inadequate fixation, or differences in the patient's own healing ability, they are prone to developing into old fracture deformities. This not only severely affects the normal anatomical structure of the wrist joint but also leads to functional impairments such as limited wrist joint movement, pain, and weakened strength, significantly reducing the patient's quality of life.

[0003] Traditional open reduction and internal fixation (ORM) is the preferred treatment for old distal radius fracture deformities. However, this method requires a large surgical incision and extensive soft tissue dissection, increasing surgical trauma and potentially disrupting local blood circulation, thus hindering fracture healing. Furthermore, the procedure relies heavily on the surgeon's clinical experience for manual reduction, making it difficult to precisely control the angle and position of fracture reduction, leading to problems such as poor reduction and recurrence of deformity postoperatively. Therefore, we propose a system using a relay guide plate for the corrective treatment of old distal radius fracture deformities. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a system for correcting deformities of old distal radius fractures by using a relay guide plate. This system addresses the technical problem that current traditional open reduction and internal fixation surgery relies on the surgeon's experience to plan the surgical path and is prone to risks due to subjective judgment bias.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a system for corrective treatment of old distal radius fracture deformities by means of a relay guide plate, comprising an old fracture-specific analysis unit and an old callus deformity fitting and adjustment unit; The old fracture analysis unit includes a deformity quantification analysis unit and a callus feature assessment unit. The deformity quantification analysis unit is used to measure the defect values ​​of radius height, palmar tilt angle and ulnar deviation angle on the reconstructed three-dimensional model. The callus feature assessment unit is used to identify, segment and assess the distribution, density and mechanical properties of callus at the deformed healing site. The old callus deformity adaptation and adjustment unit is used to receive the three-dimensional model and deformity parameters, and generate a series of personalized guide plate data for relay surgery based on them. The old callus deformity adaptation and adjustment unit includes a callus parameter and correction path linkage unit and a deformity correction force transmission adaptation unit. The callus parameter and correction path linkage unit is used to automatically plan the surgical instrument path that can avoid high-risk callus areas based on the callus data output by the callus feature assessment unit. The deformity correction force transmission adaptation unit is used to simulate and optimize the application point and direction of the correction force to achieve efficient force transmission.

[0006] Preferably, the procedure also includes a preoperative assessment and data acquisition module, a relay guide plate design and adaptation module, an intraoperative step-by-step correction execution module, and a postoperative monitoring and rehabilitation guidance module. The preoperative assessment and data acquisition module is used to acquire and process medical imaging data of the patient's wrist joint to establish a personalized three-dimensional digital model and quantify deformity parameters. The relay guide plate design and adaptation module is communicatively connected to the preoperative assessment and data acquisition module and is used to receive the three-dimensional digital model and deformity parameters, and generate a series of personalized guide plate data for relay surgery based on them. The intraoperative step-by-step correction execution module, based on the guide plate data generated by the relay guide plate design and adaptation module, manufactures a physical guide plate to guide the doctor to perform callus removal, step-by-step correction, and internal fixation operations in a predetermined order. The postoperative monitoring and rehabilitation guidance module is used to conduct phased imaging monitoring of the patient's healing status after surgery and provide personalized rehabilitation plans.

[0007] Preferably, the preoperative assessment and data acquisition module includes an image data acquisition unit and an old fracture-specific analysis unit. The image data acquisition unit is configured to acquire thin-slice three-dimensional CT scan data of the patient's affected and unaffected wrist joints. The old fracture-specific analysis unit is connected to the image data acquisition unit.

[0008] Preferably, the relay guide plate design and adaptation module includes an old callus deformity adaptation adjustment unit and a relay guide plate output unit. The old callus deformity adaptation adjustment unit is connected to the virtual surgical planning unit. The old callus deformity adaptation adjustment unit also includes an algorithm calibration and collision detection unit, which is used to perform virtual simulation and collision detection on the preliminary path generated by the callus parameter and correction path linkage unit and the deformity correction force transmission adaptation unit, and form a feedback optimization loop until the final safe correction scheme is output. The relay guide plate output unit is used to drive the 3D printing equipment to manufacture the callus removal guide plate, the orthopedic guide plate and the fixation guide plate based on the final safe correction scheme.

[0009] Preferably, the intraoperative step-by-step orthopedic execution module includes a callus removal unit and a correction unit. The callus removal unit is configured to use a callus removal guide to guide the instrument to precisely remove callus tissue within a predetermined range. The correction unit is configured to use a primary orthopedic guide and a secondary orthopedic guide in sequence to complete the main deformity correction and fine angle adjustment in a relay manner.

[0010] Preferably, the postoperative monitoring and rehabilitation guidance module includes a phased imaging detection unit and a rehabilitation guidance unit. The phased imaging detection unit is used to assess the progress of bone healing and the stability of orthopedic correction through imaging examinations at multiple predetermined time points after surgery. The rehabilitation guidance unit is used to formulate and adjust a progressive rehabilitation training plan based on the assessment results of the phased imaging detection unit.

[0011] Preferably, the callus parameter and correction path linkage unit calculates the callus removal depth using an intelligent algorithm formula, wherein the intelligent algorithm formula is: in, Spatial coordinates The cutting depth of the guide plate at that location; As the reference cutting depth; The CT value of the callus at this coordinate point; This represents the lower limit of normal cortical bone CT values. This represents the upper limit of CT values ​​for callus. For safety factor; This represents the minimum cutting depth.

[0012] Preferably, the deformity correction force transmission adapter unit is used to simulate and optimize the application point and direction of the corrective force to achieve efficient force transmission. The deformity correction force transmission adapter unit, based on the callus distribution location, uses the formula: Adjust the force transmission structure of the guide plate.

[0013] in, For the first Bone tissue stress at each point of force application; Total orthopedic force; For the first The distance from the point of force application to the center of the deformity; For the first The contact area of ​​each point of force application; This is the safe stress threshold for bone tissue.

[0014] Preferably, the high-risk structural data extracted by the preoperative assessment and data acquisition module includes the three-dimensional coordinates of the radial artery and median nerve, and a high-risk structural bounding box is automatically generated by medical imaging software. arrive These are boundary parameters.

[0015] Preferably, the algorithm calibration and collision detection unit decomposes the surgical path into instrument entry steps. Force application trajectory and equipment evacuation trajectory The trajectories described are all straight lines or gentle curves generated based on the coordinates of the incision point and the point of force application, using the formula: Calculate the intersection of the trajectory and the high-risk structure.

[0016] in, This refers to the spatial intersection area between the path and the high-risk structure. A 3D bounding box for high-risk structures; To correct the spatial trajectory segment of the path, if If so, the path is deemed risky; If so, the path is safe.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves precise analysis of fracture deformity parameters and callus characteristics through a deformity quantification analysis unit and a callus characteristic assessment unit within the old fracture specialized analysis unit. Specifically, the deformity quantification analysis unit accurately measures the defect values ​​of radial height, palmar tilt angle, and ulnar deviation angle on the reconstructed 3D model, providing precise data support for determining subsequent correction targets. The callus characteristic assessment unit can identify, segment, and assess the distribution, density, and mechanical properties of callus at the deformed healing site, providing crucial information for surgical path planning and force transmission optimization. This preoperative planning method based on precise data analysis effectively avoids planning errors caused by reliance on physician experience in traditional surgery, significantly improving the scientific rigor and precision of surgical planning. It solves the problem of traditional open reduction and internal fixation surgery relying on physician experience for surgical path planning and being prone to risks due to subjective judgment bias.

[0018] 2. This invention also utilizes a callus parameter and correction path linkage unit, employing intelligent algorithm formulas to automatically plan surgical instrument paths that avoid high-risk callus areas based on callus data output by the callus feature assessment unit. The deformity correction force transmission adaptation unit uses specific formulas to simulate and optimize the application point and direction of the corrective force, achieving efficient force transmission. This avoids problems such as bone fractures and stress concentration caused by improper force transmission, significantly improving surgical safety and correction effectiveness. If the algorithm calibration and collision detection unit detects a risk in the path, it can promptly feed back to the preceding unit for parameter adjustment until a final safe correction scheme is output, further ensuring the safety of the surgical procedure.

[0019] 2. This invention also utilizes a relay guide output unit based on the final safe correction scheme to drive a 3D printing device to manufacture callus removal guides, orthopedic guides, and fixation guides. These guides are custom-made according to the patient's specific fracture deformity and callus characteristics, closely conforming to the anatomical structure of the distal radius. During surgery, surgeons can use these personalized guides to precisely perform callus removal, stepwise orthopedic correction, and internal fixation, effectively avoiding the subjectivity and uncertainty of manual manipulation in traditional surgery, significantly improving the accuracy and stability of intraoperative procedures, and ensuring that the fracture achieves the ideal reduction effect. Attached Figure Description

[0020] Figure 1 This is a system block diagram of the present invention; Figure 2 This is a flowchart illustrating the working logic of the relay guide plate design and adaptation module in this invention. Detailed Implementation

[0021] Example: Figures 1 to 2 As shown, the present invention relates to a system for correcting old distal radius fracture deformities by means of a relay guide plate, and further includes a preoperative assessment and data acquisition module, a relay guide plate design and adaptation module, an intraoperative step-by-step correction execution module, and a postoperative monitoring and rehabilitation guidance module. The preoperative assessment and data acquisition module is used to acquire and process medical imaging data of the patient's wrist joint in order to build a personalized three-dimensional digital model and quantify deformity parameters. The preoperative assessment and data acquisition module includes an imaging data acquisition unit and a special analysis unit for old fractures. The imaging data acquisition unit collects three-dimensional CT data and MRI soft tissue data of the distal radius of the patient. The three-dimensional CT is used to clearly present the distribution of callus, radius morphology and deformity angle, palmar tilt angle, ulnar deviation angle and radius height of old fractures. The MRI is used to assess the adhesion or damage of soft tissues such as ligaments and tendons around the wrist joint caused by long-term deformity, providing comprehensive data support for the formulation of subsequent treatment plans.

[0022] The old fracture analysis unit includes a deformity quantification analysis unit and a callus feature assessment unit. The deformity quantification analysis unit is used to measure the defect values ​​of radius height, palmar tilt angle and ulnar deviation angle on the reconstructed three-dimensional model. The callus feature assessment unit is used to identify, segment and assess the distribution, density and mechanical properties of callus at the deformed healing site. The deformity quantification analysis subunit performs post-processing on 3D CT data and uses medical image analysis software (such as Mimics) to quantify deformity parameters, calculate the radius height defect value, palmar tilt angle and ulnar deviation angle abnormality, clarify the deformity correction target value, trace the deformity formation process, and provide a basis for planning the correction intensity in combination with the bone callus maturity.

[0023] The callus feature assessment subunit segments and analyzes the callus region in CT data using the density threshold method, classifies the callus into low-density cartilaginous callus, medium-density mixed callus, and high-density hard callus, marks the boundary and distribution of callus with normal bone tissue, and assesses the degree to which callus hinders orthopedic procedures.

[0024] The relay guide design and adaptation module communicates with the preoperative assessment and data acquisition module to receive three-dimensional digital models and deformity parameters, and based on this, generates a series of personalized guide data for relay surgery. The relay guide design and adaptation module includes an old callus deformity adaptation adjustment unit and a relay guide output unit. The old callus deformity adaptation adjustment unit is used to perform virtual simulation and collision detection on the preliminary path generated by the callus parameter and correction path linkage unit and the deformity correction force transmission adaptation unit, and form a feedback optimization loop until the final safe correction scheme is output. The callus parameter and correction path linkage unit includes intelligent algorithms and collision detection algorithms. Based on the callus data output by the callus feature evaluation unit, it automatically plans surgical instrument paths that avoid high-risk callus areas. The unit inputs preoperative callus density and extent data, along with the deformity correction target, into the intelligent algorithm using the formula: Automatically optimize the callus removal depth threshold of the orthopedic guide.

[0025] in, Spatial coordinates The cutting depth of the guide plate at the location (mm); The reference cutting depth is set at 2.0-3.0 mm, based on clinical experience. The CT value (unit: HU) of the callus at this coordinate point is extracted from preoperative 3D CT data; The lower limit of normal cortical bone CT value (taken as 1200HU); The upper limit of the CT value for callus (taken as 4000HU); For safety margin, a value of 0.8-1.0 is used, adjusted based on callus maturity. The minimum cutting depth is set to 0.5 mm to prevent over-cutting.

[0026] For example, a greater cutting depth is planned for high-density hard callus areas to ensure thorough removal; the cutting depth is appropriately reduced for low-density cartilaginous callus areas to avoid damage to normal bone. At the same time, the algorithm simulates the stress distribution of bone tissue during orthodontic treatment to ensure that the correction path avoids weak connection areas between callus and normal bone, preventing bone fracture.

[0027] The deformity correction force transmission adapter unit is used to simulate and optimize the application point and direction of the corrective force to achieve efficient force transmission. Based on the location of the callus distribution, the deformity correction force transmission adapter unit uses the formula: Adjust the force transmission structure of the guide plate.

[0028] in, For the first Bone tissue stress (MPa) at each point of force application; The total orthopedic force is taken as 50-150N, calculated based on the degree of deformity; For the first Distance (mm) from each point of force application to the center of the deformity; For the first Contact area (mm²) of each force application point; The safe stress threshold for bone tissue is set at 150 MPa, with reference to the mechanical properties of cortical bone. Contact area at the point of force application The smoother the clean bone surface after callus removal, the better. The uniformity determines, It can be designed to be larger, with higher stress. It is easier to control within the safe threshold; if there are residual callus protrusions on the bone surface, To calculate the deviation, the corresponding area needs to be reduced. To avoid stress concentration. Distance between the force application point and the stress point. : The defined area for callus removal determines the safe zone where force can be applied, and thus determines... The range of values ​​for .

[0029] When callus is concentrated in the radial styloid process area, the force application point of the guide plate is designed in the normal bone tissue area on the dorsal or palmar side of the radius. The orthopedic force is transmitted through the lever principle to avoid the force acting directly on the callus area and causing stress concentration. This unit uses finite element analysis technology to simulate and verify the force transmission path to ensure that the force transmission is efficient and safe.

[0030] The planned path is verified through virtual simulation, and a collision detection algorithm is used to identify the risk of interference between the path and nerves, blood vessels, and normal bone tissue. The collision detection algorithm formula is as follows: like If so, the path is deemed risky; If so, the path is safe.

[0031] in, This refers to the spatial intersection area between the path and the high-risk structure. A 3D bounding box for high-risk structures; The spatial trajectory segment for correcting the path.

[0032] It is a "spatial safety boundary box" for high-risk structures such as nerves and blood vessels. The core of the calculation is to extract the location of the structure from preoperative CT / MRI.

[0033] Step 1: Automatic segmentation of high-risk structures. Using medical imaging software (such as Mimics, 3D Slicer), high-risk structures are automatically segmented based on their density characteristics in CT / MRI. The software will then generate a three-dimensional model of the structure.

[0034] Step 2: Automatically generate bounding boxes. The software automatically calculates the smallest cuboid that can completely enclose the structure from the segmented 3D model, i.e., the bounding box. Output the coordinates of the six boundaries of the cuboid. arrive .

[0035] It is the movement trajectory of surgical instruments, which is broken down according to the surgical logic of entry → operation → withdrawal. Each trajectory is a straight line or a gentle curve between two points.

[0036] To determine key locations, first identify two core positions: Surgical incision point The pre-planned safe incision, with coordinates read from the pre-operative CT scan; Point of application of force The coordinates of the safe force application point determined by the force transmission unit are also read from the CT.

[0037] Instrument entry trajectory: from the incision To the point of application of force The line has the following parametric equation: From 0 to 1, It's an incision. It is the point of application of force; Force application trajectory: the small-amplitude movement of the instrument when force is applied; Equipment evacuation trajectory: from the point of force application Back to the incision The straight line, that is The reverse trajectory.

[0038] The software automatically generates the trajectory. After inputting the coordinates of the incision and force application point into the surgical planning software, the software automatically generates the parametric equations for three trajectory segments, which are... , Corresponding to 3 trajectory segments.

[0039] It should be noted that: It's not a complex curve, but a simple straight-line trajectory based on the surgical steps. The coordinates are sourced from preoperative CT scans, so there's no need to manually calculate equations; the software automatically calculates the intersection. Final judgment and Whether a collision occurs is also determined by the software: The software will boundary coordinates and Substituting the trajectory equation into the formula: It automatically calculates whether the trajectory enters the bounding box; if the coordinates of all points on the trajectory are not within the bounding box... Within the boundary, that is If the path is safe, then the path is secure; if some points are in... within, that is If this indicates a risk, the application point or cut location needs to be adjusted, and the process needs to be regenerated. and .

[0040] If a risky path is detected, the parameters are re-optimized in the intelligent algorithm path optimization and correction stage; if the path is safe, a final safe correction plan is generated.

[0041] The relay guide output unit is used to drive the 3D printing equipment to manufacture callus removal guides, orthopedic guides, and fixation guides based on the final safety correction scheme.

[0042] Based on the above optimization results, digital models of three types of relay guide plates are designed: Bone callus removal guide: The model marks the boundary line for bone callus removal, which perfectly matches the marked range of the preoperative bone callus feature assessment unit, guiding the instruments to accurately remove bone callus during the operation.

[0043] Step-by-step orthopedic guides: These are divided into primary orthopedic guides, used to correct major deformities such as radial shortening and ulnar deviation, and secondary orthopedic guides, used for fine-tuning angular deformities such as palmar tilt and ulnar deviation. The guide's positioning structure precisely conforms to the patient's radial anatomical landmarks, using the formula: Ensure proper fit of the guide plate.

[0044] in, To average the fitting deviation, This is the actual distance between the guide plate and the bone surface. For the ideal fit distance, Let V be the contact volume of the guide plate.

[0045] Temporary fixation guide: The model is adapted to the irregular bone surface morphology after correction of old fractures, and multiple fixation holes are designed for temporary fixation of the fracture fragments after reduction during surgery. The digital model is imported into a 3D printer, and a solid guide is printed using a biocompatible resin material, such as polylactic acid. The guide is then installed using a 3D bone model of the patient to ensure a fit greater than 95%.

[0046] The intraoperative step-by-step correction execution module, based on a physical guide plate manufactured using guide plate data generated by the relay guide plate design and adaptation module, guides the surgeon to perform callus removal, step-by-step correction, and internal fixation operations in a predetermined sequence. The intraoperative step-by-step correction execution module includes a callus removal unit and a correction unit: The callus removal unit is configured to precisely remove callus tissue within a predetermined range using a callus removal guide plate and instrument. After exposing the fracture area during the operation, the callus removal guide plate is attached to the radial surface and aligned with the radial anatomical landmarks using a positioning pin. Under the guidance of the guide plate, a high-speed drill or bone chisel is used to remove the callus along the callus removal boundary line. During the process, real-time fluoroscopy using a C-arm machine is used to confirm that the callus removal range is consistent with the preoperative plan.

[0047] The correction unit is configured to use primary and secondary orthodontic guides in sequence to complete the correction of major deformities and fine adjustment of angles in a relay manner.

[0048] Specifically: Step 1: Install the primary orthopedic guide plate, and apply external force to the radius through force application devices such as screws or spreaders to gradually correct radius shortening or ulnar deviation deformity. After each application of force, the correction progress is confirmed by a C-arm machine.

[0049] Step 2: Replace the secondary orthopedic guide plate and proceed with fine-tuning the angle deformity. For example, if the palmar tilt angle needs to be corrected from -5° to 12°, the secondary guide plate uses multiple fine-tuning mechanisms to gradually adjust the angle in 2-3 steps, ultimately using the formula: Control the overall angle correction error and adjust the palm tilt angle and ulnar deviation angle to the normal range. Among these, This represents the total angle correction error; The primary guide plate's main deformity correction error is ≤1.0°. For the secondary guide plate angle fine adjustment error (≤0.5°); The error propagation coefficient is set to 0.8 for both, and is corrected by the positioning accuracy of the guide plate.

[0050] The postoperative monitoring and rehabilitation guidance module is used to monitor the patient's healing progress through stages using imaging techniques and to provide personalized rehabilitation plans. The module includes a staged imaging unit and a rehabilitation guidance unit. The phased imaging unit is used to assess bone healing progress and orthopedic stability through imaging examinations at multiple predetermined time points after surgery. Four weeks post-surgery: A 3D CT scan was performed to assess the bone callus formation (such as whether the callus has begun to be absorbed and whether new trabeculae have begun to form) and to confirm that the fracture has not been displaced.

[0051] Eight weeks post-surgery: Take an X-ray to assess the progress of fracture healing, such as whether the callus density has decreased and whether the fracture line has become blurred.

[0052] 12 weeks post-surgery: A 3D CT scan is performed to confirm whether the height and angle of the distal radius's anatomical structure remain stable and to rule out the risk of deformity recurrence.

[0053] The rehabilitation guidance unit is used to develop and adjust a progressive rehabilitation training plan based on the assessment results of the phased imaging detection unit. Based on the imaging results, a personalized rehabilitation plan will be developed: In the early stages, 1-4 weeks post-surgery: Under the guidance of a rehabilitation therapist, perform passive flexion, extension, and rotation exercises of the wrist joint for 15-20 minutes each time, twice a day, to relieve old soft tissue adhesions.

[0054] Mid-term, 5-8 weeks post-surgery: Gradually increase active activities, such as grasping elastic balls and wrist joint resistance training, with the intensity of training limited to the point where the patient does not experience significant pain.

[0055] In the later stages, 9-12 weeks post-surgery: functional training begins, such as simulating everyday movements like wringing a towel and using chopsticks, to restore normal wrist function. Simultaneously, the DASH score is used regularly to assess the patient's functional recovery, and the rehabilitation plan is adjusted based on the scores.

[0056] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A system for correcting deformities of old distal radius fractures using a relay guide plate, characterized in that, It includes a specialized analysis unit for old fractures and a unit for adjusting and adapting to old callus deformities; The old fracture analysis unit includes a deformity quantification analysis unit and a callus feature assessment unit. The deformity quantification analysis unit is used to measure the defect values ​​of radius height, palmar tilt angle and ulnar deviation angle on the reconstructed three-dimensional model. The callus feature assessment unit is used to identify, segment and assess the distribution, density and mechanical properties of callus at the deformed healing site. The old callus deformity adaptation and adjustment unit includes a callus parameter and correction path linkage unit and a deformity correction force transmission adaptation unit. The callus parameter and correction path linkage unit is used to automatically plan surgical instrument paths that can avoid high-risk callus areas based on the callus data output by the callus characteristic assessment unit. The deformity correction force transmission adaptation unit is used to simulate and optimize the application point and direction of the correction force to achieve efficient force transmission.

2. The system for correcting old distal radius fracture deformities using a relay guide plate according to claim 1, characterized in that, It also includes a preoperative assessment and data acquisition module, a relay guide plate design and adaptation module, an intraoperative step-by-step correction execution module, and a postoperative monitoring and rehabilitation guidance module; The preoperative assessment and data acquisition module is used to acquire and process medical imaging data of the patient's wrist joint in order to establish a personalized three-dimensional digital model and quantify the deformity parameters. The relay guide plate design and adaptation module is communicatively connected to the preoperative assessment and data acquisition module, and is used to receive three-dimensional digital models and deformity parameters, and generate a series of personalized guide plate data for relay surgery based on these parameters. The intraoperative step-by-step correction execution module is a physical guide plate manufactured based on the guide plate data generated by the relay guide plate design and adaptation module, which guides the doctor to perform callus removal, step-by-step correction and internal fixation operations in a predetermined order; The postoperative monitoring and rehabilitation guidance module is used to conduct phased imaging monitoring of the patient's healing status after surgery and to provide personalized rehabilitation plans.

3. The system for correcting old distal radius fracture deformities using a relay guide plate according to claim 2, characterized in that, The preoperative assessment and data acquisition module includes an image data acquisition unit and a special analysis unit for old fractures; the image data acquisition unit is configured to acquire thin-slice three-dimensional CT scan data of the patient's affected and unaffected wrist joints; The old fracture analysis unit is connected to the image data acquisition unit.

4. A system for correcting old distal radius fracture deformities using a relay guide plate according to claim 2, characterized in that, The relay guide plate design and adaptation module includes an old callus deformity adaptation adjustment unit and a relay guide plate output unit: the old callus deformity adaptation adjustment unit is connected to the virtual surgical planning unit; The old callus deformity adaptation adjustment unit also includes an algorithm calibration and collision detection unit, which is used to perform virtual simulation and collision detection on the preliminary path generated by the callus parameter and correction path linkage unit and the deformity correction force transmission adaptation unit, and form a feedback optimization loop until the final safe correction scheme is output. The relay guide plate output unit is used to drive the 3D printing equipment to manufacture the callus removal guide plate, the orthopedic guide plate, and the fixation guide plate based on the final safety correction scheme.

5. A system for correcting old distal radius fracture deformities using a relay guide plate according to claim 2, characterized in that, The intraoperative step-by-step correction execution module includes a callus removal unit and a correction unit: the callus removal unit is configured to precisely remove callus tissue within a predetermined range using a callus removal guide plate and guided instruments; The correction unit is configured to use primary and secondary orthodontic guides in sequence to complete the main deformity correction and fine angle adjustment in a relay manner.

6. A system for correcting old distal radius fracture deformities using a relay guide plate according to claim 2, characterized in that, The postoperative monitoring and rehabilitation guidance module includes a phased imaging detection unit and a rehabilitation guidance unit: The staged imaging detection unit is used to assess bone healing progress and orthodontic stability through imaging examinations at multiple predetermined time points after surgery. The rehabilitation guidance unit is used to develop and adjust a progressive rehabilitation training plan based on the assessment results of the phased imaging detection unit.

7. A system for correcting old distal radius fracture deformities using a relay guide plate according to claim 4, characterized in that, The callus parameter and correction path linkage unit calculates the callus removal depth using an intelligent algorithm formula, which is: .

8. Among them, Spatial coordinates The cutting depth of the guide plate at that location; As the reference cutting depth; The CT value of the callus at this coordinate point; This represents the lower limit of normal cortical bone CT values. This represents the upper limit of CT values ​​for callus. For safety factor; This represents the minimum cutting depth.

9. A system for correcting old distal radius fracture deformities using a relay guide plate according to claim 4, characterized in that, The deformity correction force transmission adapter unit is used to simulate and optimize the application point and direction of the corrective force to achieve efficient force transmission via the formula: 。 10. Adjust the force transmission structure of the guide plate; in, For the first Bone tissue stress at each point of force application; Total orthopedic force; For the first The distance from the point of force application to the center of the deformity; For the first The contact area of ​​each point of force application; This is the safe stress threshold for bone tissue.

11. A system for correcting old distal radius fracture deformities using a relay guide plate according to claim 2, characterized in that, The high-risk structural data extracted by the preoperative assessment and data acquisition module includes the three-dimensional coordinates of the radial artery and median nerve. Medical imaging software automatically generates bounding boxes for these high-risk structures. arrive These are boundary parameters.

12. A system for correcting old distal radius fracture deformities using a relay guide plate according to claim 4, characterized in that, The algorithm calibration and collision detection unit breaks down the surgical path into instrument entry steps. Force application trajectory and equipment evacuation trajectory The trajectories are all straight lines or gentle curves generated based on the coordinates of the incision point and the point of force application, using the formula: .

13. Calculate the intersection of the trajectory and the high-risk structure; in, This refers to the spatial intersection area between the path and the high-risk structure. A 3D bounding box for high-risk structures; To correct the spatial trajectory segment of the path, if If so, the path is deemed risky; If so, the path is safe.

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