Novel osteotomy orthopedic implantation system

By using simulation models and fine control modules in the osteotomy orthopedic implantation system, the problem of difficult opening steps and strength during surgery is solved, and adaptation to patients with different bone density and the risk of iatrogenic fractures is reduced.

CN119924976AInactive Publication Date: 2025-05-06TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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Patent Information

Application Number
CN202510280782.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-11
Publication Date
2025-05-06
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In osteotomy orthopedic surgery, the prior art is difficult to effectively control the steps and strength of the expansion, especially in patients with different bone density and elderly patients, there is a risk of iatrogenic fractures.

Method used

A new osteotomy orthopedic implantation system is adopted, including a collection module, a bone stent assembly, a planning module and a control module. By collecting the patient's medical images and bone density data before surgery, establishing a simulation model, planning the angle and process of opening after osteotomy, and controlling the rotation of the opening assembly through a drive piece, an inertial sensor and a gyroscope, fine control of the opening step and force of opening.

Benefits of technology

It effectively reduces the probability of iatrogenic fractures, adapts to patients with different bone density, and improves the safety and accuracy of the surgery.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the field of medical apparatus and instruments, in particular to a novel osteotomy orthopedic implantation system which comprises an acquisition module used for acquiring medical images and bone density data of a patient before an operation; the bone distraction assembly comprises a first distraction piece, a second distraction piece and a driving piece, the first distraction piece is hinged to the second distraction piece, and the driving piece is used for driving the second distraction piece to rotate to change the hinging angle; the planning module is used for establishing a simulation model based on the patient medical image and the bone mineral density data, and the simulation model is used for planning a post-osteotomy distraction angle; the simulation model is used for planning the distraction process, the distraction process is divided into a plurality of sections of second distraction piece rotating processes, and the simulation model is used for simulating bone deformation of a patient in the distraction process; and the control module is used for controlling the driving piece to drive the second distraction piece to rotate according to the distraction angle and the distraction process planned by the planning module. By the adoption of the technical scheme, the distraction device can adapt to patients with different bone mineral densities by controlling distraction stepping and force.
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Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a novel osteotomy orthopedic implant system. Background Art

[0002] The surgical principle of osteotomy is mainly based on the plasticity and regenerative ability of bones. By removing or changing part of the bone, the bone will produce a new healing and shaping process, thereby achieving the purpose of correcting the deformity. During the operation, the doctor will formulate a personalized surgical plan based on the patient's specific situation, such as the degree of deformity, the function of the joint, etc. Osteotomy is suitable for a variety of bone deformities and joint dysfunctions. For example, lower limb deformities such as O-shaped legs, X-shaped legs, and long and short legs, as well as joint deformities caused by abnormal healing of fractures and osteoarthritis. In addition, deformities caused by congenital or acquired bone diseases can also be treated by osteotomy. The steps of osteotomy include constructing an incision, cutting the cut bone in the incision, re-correcting the relative angle of the cut bone, and fixing the cut bone together with internal fixation materials such as steel plates and screws to ensure that the bone remains in the correct position during the healing process.

[0003] In the prior art, for example, CN116849756A discloses a navigation system for high tibial osteotomy of the knee joint, which verifies the fixation effect by installing a tracking array. CN109953782B discloses a bone spreader for osteotomy surgery, which captures the spreader position through a tracker to improve the control accuracy of the spread angle. However, during the osteotomy spread process, in addition to controlling the final spread angle, it is also necessary to control the spread step and strength to reduce the probability of iatrogenic fractures caused by too fast or too intense spread. Different patients have different bone densities, and elderly patients may have symptoms of osteoporosis, which poses a greater risk of iatrogenic fractures. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a novel osteotomy orthopedic implant system, which is used to adapt to patients with different bone densities by controlling the stepping and force of distraction.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: A novel osteotomy orthopedic implant system, comprising: Acquisition module: used to collect medical images and bone density data of patients before surgery; The bone distraction assembly comprises a first distraction piece, a second distraction piece and a driving member, wherein the first distraction piece is hinged to the second distraction piece, and the driving member is used to drive the second distraction piece to rotate and change the hinge angle with the first distraction piece; Planning module: used to establish a simulation model based on the patient's medical images and bone density data. The simulation model is used to plan the distraction angle after osteotomy and simulate the patient's limb force line after distraction. The simulation model is used to plan the distraction process, breaking the distraction process into several sections of the second distraction piece rotation process, each section is set with independent torque and step amplitude, and the simulation model is used to simulate the patient's bone deformation during the distraction process. Control module: used to control the driving member to drive the second opening piece to rotate according to the opening angle and opening process planned by the planning module.

[0006] The above scheme has the following beneficial effects: 1. In this scheme, as with conventional osteotomy and orthopedic implant surgery, the bone distraction position and distraction angle need to be determined before the operation. This part of the work is carried out in a simulation model based on medical images. The simulation model can verify the force line of the limb after correction to ensure that the predetermined effect is achieved. At the same time, the patient's bone density data needs to be collected before the operation. The bone density data is applied to the simulation model to give bone material properties for mechanical simulation. The distraction process is disassembled into multiple sections of control to flexibly adapt to the mechanical changes under different distraction ranges, and different torques and step amplitudes are controlled to reduce the probability of iatrogenic fractures caused by the distraction process.

[0007] 2. In this solution, the bone distraction assembly is used to complete the bone distraction operation, wherein the first distraction piece and the second distraction piece are inserted into the bone incision and fit the upper and lower sides of the bone incision respectively, and the driving member is used to drive the second distraction piece to rotate, thereby expanding the angle between the first distraction piece and the second distraction piece, distracting the bone incision, and correcting the patient's bone. The control module can control the bone distraction assembly based on the multi-stage rotation process planned in the planning module, thereby distracting the patient's bone incision under automatic control.

[0008] Furthermore, the driving member is fixedly connected to the first opening piece, the driving member is located on a side of the first opening piece away from the hinge, the driving member is an electric lead screw, and the second opening piece is connected to the lead screw nut of the electric lead screw through a telescopic member.

[0009] Beneficial effect: The driving member takes the first opening piece as a reference, drives one end of the second opening piece away from the first opening piece, and the driving force is provided by the first opening piece. However, since the opening trajectories of the first opening piece and the second opening piece are arc-shaped, and the electric lead screw can only increase the driving force in the straight line direction, a telescopic member is set to adapt to the trajectory change.

[0010] Furthermore, an inertial sensor and a gyroscope are fixedly connected to the second opening piece, and the inertial sensor and the gyroscope are used to detect the movement process of the second opening piece and calculate the position of the hinge of the second opening piece in the space coordinate according to the preset shape parameters of the second opening piece.

[0011] Beneficial effects: The inertial sensor and gyroscope can capture the direction and value of acceleration respectively, thereby detecting the position change of the second expansion piece in space. Since the second expansion piece is a fixed shape structure, the position of the hinge in the spatial coordinate is derived by the preset shape parameters. The spatial position of the hinge is indirectly measured by the inertial sensor and gyroscope, so that the hinge does not need to be equipped with a sensor, and can be thinner and lighter to facilitate insertion into the bone incision.

[0012] Further, after planning the distraction angle after osteotomy, the planning module calculates the osteotomy distraction opening length of the patient based on the simulation model; The control module is used to calculate the position of the osteotomy support opening in the spatial coordinates according to the position of the hinge, the planned opening angle and the length of the osteotomy support opening collected by the current inertial sensor and the gyroscope when the hinge reaches the osteotomy hinge point of the patient; The control module is used to calculate the rotation angle of the second distraction piece that produces the same osteotomy support opening after the offset based on the position offset value of the hinge collected by the inertial sensor and the gyroscope during the distraction process and based on the position of the osteotomy support opening in the spatial coordinates. The control module controls the rotation of the second distraction piece based on the calculated rotation angle after the offset.

[0013] Beneficial effects: During the distraction process, the bone distraction assembly may be offset, thus affecting the control of the distraction angle. The inertial sensor and gyroscope can detect the offset value, thereby compensating after the offset and changing the opening amount of the bone distraction assembly so that the actual bone opening angle after the offset remains the same as before the deviation. Based on the drive, inertial sensor and gyroscope, the first distraction piece, the second distraction piece, the position of the hinge and the angle between the first distraction piece and the second distraction piece can be known. However, there is a lack of position information of the osteotomy distraction opening in the spatial coordinates.

[0014] The initial stage of the distraction process is assumed to be that the hinge is located at the osteotomy hinge point, which is the operating position of the distraction action planned by the planning module, and the position is reached by the physician. At this time, the position information of the planned osteotomy distraction opening in the spatial coordinates can be determined based on the planned distraction angle and the length of the osteotomy distraction opening. Therefore, in the subsequent distraction process, the osteotomy distraction opening in the same spatial coordinates is used as the standard to change the preset distraction angle plan.

[0015] Furthermore, it also includes a machine learning module, which is used to collect the position offset information of the hinge during the osteotomy and distraction process, and perform learning and training based on the patient's medical images, bone density data and the planned distraction angle after osteotomy. The machine learning module is used to predict the possible position offset of the hinge during the distraction process when simulating the patient's bone deformation during the distraction process.

[0016] Beneficial effects: The deviation during the distraction process affects not only the final osteotomy distraction angle, but also the mechanical process during the distraction process. The position deviation of the hinge is likely to reduce the contact area between the first distraction piece and the second distraction piece and the bone, thereby causing the bone to bear greater pressure. During the distraction process, due to the short process, it is difficult to analyze and simulate the changes that have occurred again. Therefore, machine learning is used to learn the possible deviations before the operation to predict the situation during the distraction process. This advances the computing power demand from the intraoperative to the preoperative period.

[0017] Furthermore, the machine learning module is also used to simulate the bone deformation of the patient after the hinge position shifts during the distraction process after predicting the hinge position shift, and compensate for the torque and step amplitude of each rotation process after the hinge position shifts.

[0018] Beneficial effects: After the prediction is completed, the possible deviation conditions are mechanically analyzed to obtain adjustment strategies that adapt to different deviation conditions so that adjustments can be made during surgery.

[0019] Furthermore, the control module is used to match the predicted offset in the machine learning module according to the offset information after the position of the hinge is offset, and control the rotation process of the second spreading piece based on the compensated torque and step amplitude.

[0020] Beneficial effect: The control module can match the predicted offset according to the position offset of the hinge through fuzzy pairing, and control the rotation process of the second opening piece according to its compensation value to adapt to the mechanical change caused by the position offset of the hinge.

[0021] Furthermore, an arc-shaped guide rail is provided at one end of the first opening piece away from the hinge, and an end of the second opening piece away from the hinge is slidably connected to the arc-shaped guide rail.

[0022] Beneficial effect: The guide rail can provide stronger stability and reduce vibration during the expansion process of the second expansion piece.

[0023] Furthermore, the arc-shaped guide rail is provided with an angle scale, and the first opening piece is provided with a length scale.

[0024] Beneficial effects: The angle scale and the length scale can facilitate the physician to obtain the operation information of the bone distraction component by observing the operation site.

[0025] Furthermore, the inertial sensor and the gyroscope are both located on the side of the second expansion piece away from the hinge, and a start button is provided on the side of the first expansion piece away from the hinge. The start button is used to be pressed after the hinge reaches the osteotomy hinge point of the patient.

[0026] Beneficial effects: The inertial sensor and the gyroscope are located on the side of the second spreader away from the hinge to reduce the impact on the length of the second spreader that can be inserted into the bone incision. The start button can be pressed after the physician inserts the hinge into the patient's osteotomy hinge point, so that the bone spreader assembly can use the current position as a standard to set a preset osteotomy spreader opening position.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an axonometric schematic diagram of an embodiment of a novel osteotomy orthopedic implant system of the present invention; Figure 2 A side view schematic diagram of an embodiment of a novel osteotomy orthopedic implant system of the present invention; Figure 3 A schematic diagram of a module of an embodiment of a novel osteotomy orthopedic implant system of the present invention; Figure 4 A schematic diagram of the logic of the opening compensation of the novel osteotomy orthopedic implant system of the present invention; Figure 5 The figure is a logic diagram of mechanical change compensation of the novel osteotomy orthopedic implant system of the present invention.

[0029] The figure marks in the drawings of the specification include: 1. first opening piece; 2. second opening piece; 3. driving member; 4. inertial sensor; 5. arc guide rail; 6. telescopic member; 7. start button. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following is further described in detail through specific implementation methods: As attached Figure 1-Figure 5 Shown: A novel osteotomy orthopedic implant system, comprising: Acquisition module: used to collect medical images and bone density data of patients before surgery. The medical images are one or more of CT and MRI. The bone density data is collected based on a bone densitometer. Bone distraction assembly: comprising a first distraction piece 1, a second distraction piece 2 and a driving member 3, wherein the first distraction piece 1 is hinged to the second distraction piece 2, and the driving member 3 is used to drive the second distraction piece 2 to rotate and change the hinge angle with the first distraction piece 1; Planning module: used to establish a simulation model based on the patient's medical images and bone density data. The simulation model is used to plan the distraction angle after osteotomy and simulate the patient's limb force line after bone distraction. The simulation model is used to plan the distraction process, breaking the distraction process into several sections of the second distraction piece 2 rotation process, each section is set with an independent torque and step amplitude, and the simulation model is used to simulate the patient's bone deformation during the distraction process; Control module: used to control the driving member 3 to drive the second opening piece 2 to rotate according to the opening angle planned by the planning module and the opening process planned by the simulation model.

[0034] The driving member 3 is fixed to the first opening piece 1 by bolts. The driving member 3 is located on the side of the first opening piece 1 away from the hinge. The driving member 3 is an electric screw. The second opening piece 2 is connected to the screw nut of the electric screw through a telescopic member 6. The telescopic member 6 is used to transmit the linear driving force of the electric screw to drive the second opening piece 2 to rotate around the hinge with the first opening piece 1. An arc guide rail 5 is integrally formed at one end of the first opening piece 1 away from the hinge with the second opening piece 2, and one end of the second opening piece 2 away from the hinge is slidably connected to the arc guide rail 5. An angle scale is provided on the arc guide rail 5, and a length scale is provided on the first opening piece 1.

[0035] An inertial sensor 4 and a gyroscope are fixedly connected to the second opening piece 2, and are used to detect the movement process of the second opening piece 2, and calculate the position of the hinge of the second opening piece 2 in the spatial coordinates according to the preset shape parameters of the second opening piece 2, which are the shape parameters of the second opening piece 2, the length, width, and thickness data of the structure.

[0036] The inertial sensor 4 and the gyroscope are both located on the side of the second expansion piece 2 away from the hinge. A start button 7 is provided on the side of the first expansion piece 1 away from the hinge. The start button 7 is used to be pressed after the hinge reaches the osteotomy hinge point of the patient.

[0037] After the planning module plans the distraction angle after osteotomy, the coordinates of the upper and lower bone edge points of the incision are selected, and the distance between the coordinates of the upper and lower bone edge points of the incision is calculated to obtain the osteotomy distraction opening length of the patient; The control module is used to construct an isosceles triangle (the lengths of the upper and lower sections are the same after the bone is cut) by using the principle of similar triangles, taking the first distraction piece 1 as the straight line where one side of the triangle is located, and taking the planned distraction angle as the vertex angle of the triangle, when probing into the osteotomy hinge point of the patient at the hinge, and calculating the position where the side length corresponding to the vertex angle is the same as the length of the osteotomy strut opening, to obtain the position of the osteotomy strut opening in the spatial coordinates; The control module is used to connect the hinge with the two ends of the osteotomy support opening in the spatial coordinates to form a triangle based on the position offset value of the hinge collected by the inertial sensor 4 and the gyroscope during the distraction process, based on the position of the osteotomy support opening in the spatial coordinates, and take the vertex angle of the triangle corresponding to the hinge to obtain the rotation angle of the second distraction piece 2 that produces the same osteotomy support opening after the offset. The control module controls the rotation of the second distraction piece 2 based on the calculated rotation angle after the offset.

[0038] In this scheme, as with conventional osteotomy and orthopedic implant surgery, the bone distraction position and distraction angle need to be determined before the operation. This part of the work is carried out in a simulation model established based on medical images. The simulation model can verify the force line of the limb after correction to ensure that the predetermined effect is achieved. The limb force line selects different force lines for verification according to the different locations of the osteotomy and orthopedic implant surgery. For example, in high tibial osteotomy, the limb force line verified is the lower limb force line. At the same time, the patient's bone density data needs to be collected before the operation. The bone density data is applied to the simulation model to give bone material properties for mechanical simulation. The distraction process is disassembled into multi-segment control to flexibly adapt to the mechanical changes under different distraction ranges, and different torques and step amplitudes are controlled to reduce the probability of iatrogenic fractures caused by the distraction process.

[0039] The bone distraction assembly is used to complete the bone distraction operation, wherein the first distraction piece 1 and the second distraction piece 2 are inserted into the bone incision and fit the upper and lower sides of the bone incision respectively, and the driving member 3 is used to drive the second distraction piece 2 to rotate, thereby expanding the angle between the first distraction piece 1 and the second distraction piece 2, distracting the bone incision, and thus correcting the patient's bones. The control module can control the bone distraction assembly based on the multi-stage rotation process planned in the planning module, thereby distracting the patient's bone incision under automatic control.

[0040] The driving member 3 uses the first expansion piece 1 as a reference to drive one end of the second expansion piece 2 away from the first expansion piece 1, and the driving force is provided by the first expansion piece 1. However, since the opening trajectory of the first expansion piece 1 and the second expansion piece 2 is arc-shaped, and the electric lead screw can only increase the driving force in the straight direction, a telescopic member 6 is provided to adapt to the trajectory change. The guide rail can provide stronger stability and reduce the vibration of the second expansion piece 2 during the expansion process. The angle scale and the length scale can facilitate the doctor to obtain the operation information of the bone expansion assembly by observing the operation site. The inertial sensor 4 and the gyroscope are located on the side of the second expansion piece 2 away from the hinge to reduce the impact on the length of the second expansion piece 2 that can be probed into the bone incision.

[0041] When the bone is distracted, the hinge of the first distraction piece 1 and the second distraction piece 2 will be inserted into the bone incision, and the bone incision is relatively narrow, so it is difficult to carry a sensor at the hinge. The inertial sensor 4 and the gyroscope can respectively capture the direction and value of the acceleration, thereby detecting the position change of the second distraction piece 2 in space. Since the second distraction piece 2 is a fixed shape structure, the position in the spatial coordinates of the hinge is derived by pre-set shape parameters. The spatial position of the hinge is indirectly measured by the inertial sensor 4 and the gyroscope, so that the hinge does not need to be equipped with a sensor, and can be thinner and lighter to facilitate insertion into the bone incision.

[0042] During the distraction process, the bone distraction assembly may be offset, thus affecting the control of the distraction angle. The inertial sensor 4 and the gyroscope can detect the offset value, thereby compensating after the offset and changing the opening amount of the bone distraction assembly so that the actual bone distraction angle after the offset remains the same as before the deviation. Based on the drive 3, the inertial sensor 4 and the gyroscope, the first distraction piece 1, the second distraction piece 2, the position of the hinge and the angle between the first distraction piece 1 and the second distraction piece 2 can be known. However, there is a lack of position information of the osteotomy distraction opening in the spatial coordinates.

[0043] The initial stage of the distraction process is assumed to be that the hinge is located at the osteotomy hinge point, that is, the operation position of the distraction action planned by the planning module, and this position is reached by the physician during the operation.

[0044] At this time, the position information of the planned osteotomy opening in the spatial coordinates can be determined according to the planned distraction angle and the length of the osteotomy opening. Therefore, in the subsequent distraction process, the osteotomy opening in the same spatial coordinates is used as a standard to change the preset distraction angle plan, so that the preset distraction effect can be achieved even if a deviation occurs during the distraction process.

[0045] The start button 7 can be pressed after the physician has probed the hinge into the osteotomy hinge point of the patient, so that the bone distraction assembly can set a preset osteotomy distraction opening position based on the current position.

[0046] It also includes a machine learning module, which is used to collect the position offset information of the hinge during the osteotomy and distraction process, and perform learning and training based on a convolutional neural network based on the patient's medical images, bone density data and the planned distraction angle after osteotomy. The machine learning module is used to predict the possible position offset of the hinge during the distraction process when simulating the patient's bone deformation during the distraction process.

[0047] The machine learning module is also used to simulate the bone deformation of the patient after the hinge position shifts during the distraction process after predicting the hinge position shift, and to compensate for the torque and step amplitude of each rotation process after the hinge position shifts.

[0048] The control module is used to match the predicted offset in the machine learning module according to the offset information after the position of the hinge is offset, and control the rotation process of the second opening piece 2 based on the compensated torque and step amplitude.

[0049] In addition to affecting the final osteotomy distraction angle, the offset during the distraction process also affects the mechanical action process during the distraction process. The position offset at the hinge is likely to reduce the fitting area between the first distraction piece 1, the second distraction piece 2 and the bone, thereby causing the bone to bear greater pressure. However, due to the short process during the distraction process, it is difficult to analyze and simulate the changes that have occurred again. Therefore, machine learning is used to learn the possible offset conditions before surgery to predict the situation during the distraction process. Thereby, the computing power demand is advanced from intraoperative to preoperative. The control module can match the predicted offset conditions through fuzzy pairing according to the position offset at the hinge, and control the rotation process of the second distraction piece 2 according to its compensation value to adapt to the mechanical changes caused by the position offset at the hinge, so that even if a position offset occurs during the distraction process, the possibility of iatrogenic fractures can be reduced.

[0050] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A novel osteotomy orthopedic implant system, characterized in that: include: Acquisition module: used to collect medical images and bone density data of patients before surgery; The bone distraction assembly comprises a first distraction piece (1), a second distraction piece (2) and a driving member (3), wherein the first distraction piece (1) is hinged to the second distraction piece (2), and the driving member (3) is used to drive the second distraction piece (2) to rotate and change the hinge angle with the first distraction piece (1); Planning module: used to establish a simulation model based on the patient's medical images and bone density data, the simulation model is used to plan the distraction angle after osteotomy, and simulate the patient's limb force line after distraction; the simulation model is used to plan the distraction process, breaking the distraction process into several sections of the second distraction piece (2) rotation process, each section is set with an independent torque and step amplitude, the torque and step amplitude are used to control the bone deformation caused by the bone distraction component on the patient, and the simulation model is used to simulate the patient's bone deformation during the distraction process; A control module is used to control the driving member (3) to drive the second opening piece (2) to rotate according to the opening angle planned by the planning module and the opening process planned by the simulation model; An inertial sensor (4) and a gyroscope are fixedly connected to the second opening piece (2), and the inertial sensor (4) and the gyroscope are used to detect the movement process of the second opening piece (2) and calculate the position of the hinge of the second opening piece (2) in the space coordinate according to the preset shape parameters of the second opening piece (2); After the planning module plans the distraction angle after osteotomy, it calculates the length of the osteotomy distraction opening of the patient based on the simulation model; The control module is used to calculate the position of the osteotomy support opening in the spatial coordinates according to the position of the hinge, the planned opening angle and the length of the osteotomy support opening collected by the current inertial sensor (4) and the gyroscope when the hinge reaches the osteotomy hinge point of the patient; The control module is used to calculate the rotation angle of the second distraction piece (2) that produces the same osteotomy support opening after the offset based on the position offset value of the hinge point collected by the inertial sensor (4) and the gyroscope during the distraction process and based on the position of the osteotomy support opening in the spatial coordinates. The control module controls the rotation of the second distraction piece (2) based on the calculated rotation angle after the offset.

2. The novel osteotomy orthopedic implant system according to claim 1 is characterized in that: The driving member (3) is fixedly connected to the first opening piece (1), the driving member (3) is located on a side of the first opening piece (1) away from the hinge, the driving member (3) is an electric lead screw, and the second opening piece (2) is connected to the lead screw nut of the electric lead screw via a telescopic member (6).

3. The novel osteotomy orthopedic implant system according to claim 2 is characterized in that: It also includes a machine learning module, which is used to collect the position offset information of the hinge during the osteotomy and distraction process, and perform learning and training based on the patient's medical images, bone density data and the planned distraction angle after osteotomy. The machine learning module is used to predict the possible position offset of the hinge during the distraction process when simulating the patient's bone deformation during the distraction process.

4. The novel osteotomy orthopedic implant system according to claim 3 is characterized in that: The machine learning module is also used to simulate the bone deformation of the patient after the hinge position shifts during the distraction process after predicting the hinge position shift, and to compensate for the torque and step amplitude of each rotation process after the hinge position shifts.

5. The novel osteotomy orthopedic implant system according to claim 4 is characterized in that: The control module is used to match the predicted offset in the machine learning module according to the offset information after the position of the hinge is offset, and to control the rotation process of the second expansion piece (2) based on the compensated torque and step amplitude.

6. The novel osteotomy orthopedic implant system according to claim 5, characterized in that: An end of the first opening piece (1) away from the hinge is provided with an arc-shaped guide rail (5), and an end of the second opening piece (2) away from the hinge is slidably connected to the arc-shaped guide rail (5).

7. The novel osteotomy orthopedic implant system according to claim 6, characterized in that: An angle scale is provided on the arc-shaped guide rail (5), and a length scale is provided on the first opening piece (1).

8. The novel osteotomy orthopedic implant system according to claim 7, characterized in that: The inertial sensor (4) and the gyroscope are both located on a side of the second spreading piece (2) away from the hinge, and a start button (7) is provided on a side of the first spreading piece (1) away from the hinge. The start button (7) is used to be pressed after the hinge reaches the osteotomy hinge point of the patient.

Citation Information

Patent Citations

  • Bone spreader in osteotomy

    CN109953782B

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    CN116849756A