Fracture inching control system and fracture inching regulation and control method

Abstract

The invention relates to the technical field of medical equipment, in particular to an intra-fracture micro-motion control system and an intra-fracture micro-motion regulation and control method. The system comprises a bone plate and a bone screw, the bone plate is connected to a fracture position, the bone screw penetrates through the bone plate and is positioned near the fracture position, a cavity position is formed in the bone screw and / or the bone plate, a memory alloy body is arranged in the cavity position, and the memory alloy body drives the bone plate and / or the bone screw to vibrate slightly through deformation. According to the intrafracture micro-motion control system, the bone plate and / or the bone screw can generate micro-vibration, micro-vibration from inside to outside is achieved, and the intrafracture micro-motion control system has the advantages of being accurate in vibration part and high in adjustability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a fracture internal micro-motion control system and a fracture internal micro-motion regulation method. Background Art

[0002] Micro-vibration therapy after fracture surgery can significantly accelerate the recovery process. This therapy stimulates the fracture area through low-frequency, low-intensity vibrations, which can activate osteoblasts and promote new bone formation, thereby shortening the time for bone healing. At the same time, micro-vibration can also improve local blood circulation, quickly transport oxygen and nutrients to the fracture site, improve the metabolic environment of the tissue, and thus increase the healing speed.

[0003] Micro-vibration therapy can also effectively prevent postoperative muscle atrophy and joint stiffness. After a fracture, long periods of rest often lead to reduced muscle activity, and vibration stimulation helps maintain muscle activity and prevent atrophy. At the same time, micro-vibration can also relieve postoperative pain and inflammation, and increase the comfort of the patient's recovery. The slight stimulation of this vibration therapy can reduce the accumulation of inflammatory factors and relieve the patient's postoperative discomfort.

[0004] In addition, micro-vibration therapy has a positive effect on the repair of soft tissues, can promote the healing of surrounding muscles and ligaments, reduce scar formation, and help patients restore motor function after rehabilitation. As a non-invasive auxiliary treatment, micro-vibration is suitable for all types of patients, especially the elderly who recover more slowly. It is not only convenient and easy to use, but can also be combined with other rehabilitation methods such as physical therapy to further improve the overall efficacy.

[0005] Existing micro-vibration mainly drives the micro-vibration block to generate micro-vibration through external vibration. The commonly used methods for generating micro-vibration are: external micro-vibration device, ultrasonic treatment, kinetic energy transfer, vibration platform, etc. However, the vibration force provided by the outside causes the entire surgical area to vibrate, which not only causes discomfort or pain to the patient, especially in the early recovery stage, but also because each person's weight and tolerance are different, it is difficult to grasp the power of external vibration so that it cannot be regulated in a targeted manner, affecting the treatment effect. Summary of the invention

[0006] The purpose of the present invention is to avoid the shortcomings of the prior art and provide an internal fracture micro-motion control system, which can cause the bone plate and / or bone screws themselves to micro-vibrate, achieving micro-vibration from the inside out, and has the advantages of precise vibration location and high adjustability.

[0007] To achieve one of the above purposes, the present invention provides the following technical solutions:

[0008] Provides intra-fracture micro-motion control system, including:

[0009] a bone plate, the bone plate being attached to the fracture,

[0010] a bone screw that passes through the bone plate and is positioned adjacent to the fracture,

[0011] A cavity is provided in the bone screw and / or the bone plate, and a memory alloy body is provided in the cavity. The memory alloy body drives the bone plate and / or the bone screw to micro-vibrate through deformation.

[0012] In some embodiments, an electrode is further included, wherein the electrode is electrically connected to the memory alloy body through the human body outside the body, and the current of the electrode controls the deformation degree of the memory alloy body, and the deformation degree of the memory alloy drives the bone screw and / or the bone plate to micro-vibrate.

[0013] In some embodiments, the electrode includes a positive electrode and a negative electrode, the positive electrode and the negative electrode are respectively configured as electrode sheets, and the current of the electrode is 1 mA to 10 mA.

[0014] In some embodiments, the micro-vibration amplitude of the bone screw is 0 mm to 1 mm.

[0015] In some embodiments, the bone plate has a thickness of 1 mm to 3 mm, a width of 5 mm to 15 mm, and a length of 40 mm to 70 mm.

[0016] In some embodiments, the bone screw has a diameter of 3 mm to 6 mm and a length of 30 mm to 50 mm.

[0017] In some embodiments, the material of the shape memory alloy body includes nickel-titanium alloy, copper-zinc-aluminum alloy, copper-aluminum-nickel alloy, iron-manganese-silicon alloy, iron-platinum alloy or high entropy shape memory alloy.

[0018] In some embodiments, the electrode is connected to a current controller, and the current controller regulates the current of the electrode according to the fracture healing process.

[0019] In some embodiments, the current controller includes a sensor that monitors the progress of fracture healing.

[0020] Beneficial effects of the micro-motion control system in fractures of the present invention:

[0021] The internal fracture micro-motion control system of the present invention has a memory alloy body built into the bone plate and / or bone screw. By controlling the deformation of the memory alloy body, the deformation amount of the memory alloy body can be utilized to control the vibration of the bone plate and / or bone screw from the inside out. Compared with traditional technologies, the micro-vibration mode of the present invention is generated from the inside out, avoiding the problem of requiring a large amplitude of external vibration force to affect other parts and cause secondary injuries.

[0022] To achieve the second objective above, the present invention provides the following technical solutions:

[0023] A method for controlling micro-motion in a fracture is also provided, using the micro-motion control system in a fracture, and comprising the following steps:

[0024] Starting the electrode so that the current of the electrode is electrically connected to the memory alloy body through the human body, and adjusting the current of the electrode according to the fracture healing process;

[0025] The memory alloy body is stimulated to continuously deform by a changing electric current, and the deformation of the memory alloy body drives the bone plate and / or bone screw to micro-vibrate.

[0026] Beneficial effects of the micro-motion control method in fractures of the present invention:

[0027] (1) The micro-motion control method for fractures of the present invention, the memory alloy can react sensitively to electric current, so the current of the electrode is regulated so that the current is electrically connected to the bone plate and / or bone screw through the human body, thereby causing the memory alloy body to deform, and the bone plate and / or bone screw are driven to micro-vibrate by the deformation of the memory alloy body. Compared with the conventional technology, the micro-vibration mode of the present invention is generated from the inside out, thus avoiding the problem of affecting other parts and causing secondary injuries due to the need for a large amplitude of external vibration force.

[0028] (1) The method for regulating micromotion in fractures of the present invention can effectively adjust the micromotion amplitude according to the degree of fracture by controlling the current, and can accurately regulate the amount of microvibration by controlling the current of the electrode, so as to accurately improve the treatment effect and is suitable for large-scale production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the connection between the bone plate and the fracture site in an embodiment of the present invention.

[0030] Figure 2 Schematic diagram of the structure of the bone plate according to the embodiment of the present invention.

[0031] Figure 3 Schematic diagram of the structure of a screw according to an embodiment of the present invention.

[0032] Figure 4 is a cross-sectional view of a screw according to an embodiment of the present invention.

[0033] Figure 5 This is a working state diagram of the intra-fracture micro-motion control system of Example 1 of the present invention.

[0034] Figure 6 This is a working state diagram of the intra-fracture micro-motion control system of Example 2 of the present invention.

[0035] Figure 7It is a structural schematic diagram of the deformation of the memory alloy body according to an embodiment of the present invention.

[0036] Reference numerals

[0037] 1. Bone plate; 2. Fracture site; 3. Bone screw; 4. Cavity site; 5. Memory alloy body; 6. Positive electrode; 7. Negative electrode; 8. Memory alloy body when powered on; 9. Memory alloy body during power-on; 10. Memory alloy body after power-on; 11. Hole site; 12. External force. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0039] The terms used in the present invention are only for the purpose of describing specific implementation regulations, and are not intended to limit the present invention. The singular forms "a", "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0040] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0041] Example 1

[0042] The micro-motion control system in the fracture disclosed in this embodiment can be found in Figure 1 to Figure 5 , Figure 7 , including a bone plate 1 connected to the fracture site 2 and a bone screw 3 passing through the bone plate 1 and positioned near the fracture site 2, the bone screw 3 is installed in the bone screw 3 hole 11 to fix the fracture.

[0043] The bone plate 1 cooperates with the bone screw 3 to fix the fracture 2 and promote fracture recovery.

[0044] A cavity 4 is provided in the bone screw 3 and / or the bone plate 1, and a memory alloy body 5 is provided in the cavity 4;

[0045] The cavity position 4 is used to install the memory alloy body 5, so as to facilitate the micro-vibration of the bone screw 3 and the bone plate 1 by the deformation amplitude of the memory alloy body 5. The size of the cavity position 4 is usually 1-3mm in depth, about 1-5mm in diameter or width, and can be spherical, cylindrical or cubic in shape. It is usually located at a position corresponding to the hole position 11 of the bone screw 3 on the bone plate 1 to ensure that the shape memory alloy micro-movement part can be stably embedded and work in coordination with the structure of the bone plate 1. The space of the cavity position 4 includes but is not limited to fully enclosed, semi-enclosed and open, etc. Its spatial shape includes but is not limited to spherical, cubic, cylindrical, etc.

[0046] It also includes electrodes, which are electrically connected to the memory alloy body 5 through the human body outside the body. The current of the electrodes controls the deformation degree of the memory alloy body 5, and the deformation degree of the memory alloy drives the bone screw 3 and / or the bone plate 1 to micro-vibrate.

[0047] The electrodes provide current, and the electrodes can form a closed loop structure with the memory alloy body 5 through the skin and muscles of the human body. The magnitude of the current can control the deformation degree of the memory alloy body 5, and the dynamic deformation process can control the micro-vibration of the bone screw 3 and / or the bone plate 1. Specifically,

[0048] The microcurrent generated by the positive electrode 6 and the negative electrode 7 of the electrode can control the memory alloy body 5 to have different shapes at different current sizes, such as the unpowered memory alloy body 85, the powered memory alloy body 95, and the powered memory alloy body 105. The changes in the shape of the memory alloy body 5 can control the screw or bone plate 1 to produce microvibration.

[0049] Furthermore, the types of bone plates 1 include but are not limited to straight bone plates 1, anatomical bone plates 1, locking compression bone plates 1, dynamic compression bone plates 1, intramedullary bone plates 1, reconstruction bone plates 1, T-shaped and L-shaped bone plates 1, and external fixators, and commonly used materials include but are not limited to titanium alloy, stainless steel, and carbon fiber composite materials. The scenarios in which it can be used include but are not limited to closed fractures, open fractures, transverse fractures, oblique fractures, spiral fractures, comminuted fractures, compression fractures, linear fractures, etc.

[0050] The types of the bone screws 3 include but are not limited to cortical bone screws 3, cancellous bone screws 3, locking screws, lag screws, epiphyseal screws and self-tapping screws, and the main materials include but are not limited to titanium alloy and stainless steel.

[0051] The positive electrode 6 and the negative electrode 7 are respectively configured as electrode sheets.

[0052] The electrodes are easy to fit onto the skin.

[0053] In this embodiment, the current of the electrode is 1 mA to 10 mA.

[0054] In this embodiment, the micro-vibration amplitude of the bone screw 3 is 0 mm to 1 mm.

[0055] In this embodiment, the bone plate 1 has a thickness of 1 mm to 3 mm, a width of 5 mm to 15 mm, and a length of 40 mm to 70 mm;

[0056] The dimensions of the bone plate 1 are as follows: the thickness of the bone plate 1 is in the range of 1-5 mm, and the width depends on the specific application site, which may be between 5-20 mm. The length depends on the fracture site and length, which may be between 20-150 mm or longer. The specific size and shape of the bone plate 1 needs to be customized according to the patient's bone condition and fracture type.

[0057] In this embodiment, the bone screw 3 has a diameter of 3 mm to 6 mm and a length of 30 mm to 50 mm.

[0058] In this embodiment, the material of the memory alloy body 5 includes but is not limited to nickel-titanium alloy (Ni-Ti), copper-zinc-aluminum alloy (Cu-Zn-Al), copper-aluminum-nickel alloy (Cu-Al-Ni), iron-manganese-silicon alloy (Fe-Mn-Si), iron-platinum alloy (Fe-Pt), and high entropy shape memory alloy.

[0059] In this embodiment, the electrode is connected to a current controller, and the current controller adjusts the current of the electrode according to the fracture status.

[0060] In this embodiment, the current controller includes a sensor, which detects the degree of fracture healing and is connected to the electrode.

[0061] Combined with sensors, real-time monitoring of fracture healing progress can help doctors adjust treatment plans in a timely manner to ensure the best healing effect.

[0062] The above-mentioned intra-fracture micro-motion control system uses highly biocompatible materials and adds shape memory alloy micro-motion parts between the bone screws 3 and the bone plate 1. The micro-vibration of the shape memory alloy micro-motion parts drives the micro-vibration of the screws and the bone plate 1, allowing the vibration to be transmitted from the inside to the outside. This can give the affected area a more stable micro-vibration, facilitate the formulation of personalized treatment plans, and give patients a better treatment effect, thereby accelerating the patient's recovery.

[0063] The method for using the above-mentioned intra-fracture micro-motion control system comprises the following steps:

[0064] The electrode is started so that the current of the electrode is electrically connected to the memory alloy body 5 through the human body, and the current of the electrode is regulated according to the degree of fracture; the memory alloy body 5 is stimulated to continuously deform by the changing current, and the deformation of the memory alloy body 5 drives the bone plate 1 and / or bone screw 3 to micro-vibrate.

[0065] The memory alloy can react sensitively to electric current, so the current of the electrode is regulated so that the current is electrically connected to the bone guide plate 1 and / or the bone screw 3 through the human body, and then the memory alloy body 5 is deformed. The deformation of the memory alloy body 5 drives the bone plate 1 and / or the bone screw 3 to vibrate micro-vibration. Compared with the traditional technology, the micro-vibration mode of the present invention is generated from the inside out, avoiding the problem of affecting other parts and causing secondary injuries due to the need for a large amplitude of external vibration force. The micro-motion amplitude can be effectively adjusted according to the degree of fracture by controlling the current, and the micro-vibration amount can be accurately controlled by controlling the current of the electrode, so that the treatment effect can be accurately improved, which is suitable for large-scale production and application.

[0066] Example 2

[0067] The difference between this embodiment and embodiment 1 is that, please refer to Figure 6 In this embodiment, the memory alloy body 5 is stimulated by the external force 12 to produce micro vibration in the bone plate 1 and / or the bone screw 3 by gently pressing or occasionally shaking the body. This makes it possible to drive the bone plate 1 and / or the bone screw 3 to vibrate anytime and anywhere, thereby improving the efficiency of treatment.

[0068] Example 3

[0069] In this implementation case, a fracture internal fixation micro-motion system is used within 5 weeks after surgery. The patient cannot over-move during this stage, so an electrical stimulation device is needed to micro-vibrate the affected area to promote recovery.

[0070] At this stage, the patient's wound is still in the early stages of recovery and his or her movements are limited. In order to avoid the negative impact of excessive movement on fracture healing, the patient uses a micro-motion system for treatment through electrical stimulation. First, the doctor attaches positive electrodes 6 and negative electrodes 7 to the correct positions on the patient's skin. When powered on, these electrodes conduct microcurrents through the skin and muscles. These microcurrents are transmitted to the cavity 4301 of the bone plate 1 and the cavity 4 of the bone screw 3 through the conductive path between the bone plate 1 and the bone screw 3.

[0071] In this embodiment, the bone plate 1 used has a thickness of 2 mm, a width of 10 mm, and a length of 60 mm, which is suitable for fixation of the fracture site. The bone plate 1 is provided with a bone screw 3 hole 11, which allows the bone screw 3 to be firmly installed. The bone screw 3203 has a diameter of 5 mm and a length of 40 mm, which is selected according to the bone density of the fracture site and the required stability.

[0072] Through the control of the current, the shape memory alloy micro-movement parts in the bone plate 1 and the bone screw 3 begin to deform and generate micro-vibration, the amplitude of the micro-vibration is 0 to 1 mm, and the frequency is adjusted according to the magnitude of the current. This micro-vibration is transmitted to the fracture site through the bone plate 1 and the bone screw 3, promoting local blood circulation and cell repair, and accelerating the fracture healing process.

[0073] During this process, the current is strictly controlled within the safe range of 1-10 mA to ensure that the treatment process does not cause significant discomfort or damage to the patient. During this stage, micro-vibrations can simulate natural micro-movements, which helps bone recovery while avoiding overstimulation.

[0074] Example 4

[0075] In this implementation case, the fracture internal fixation micro-motion system is used 5 weeks after surgery, when the patient enters the light activity stage during the recovery period. At this time, the patient can perform light activities under the guidance of a doctor, using external force and daily activities to stimulate the fracture site.

[0076] Five weeks after the operation, the patient has begun to recover and is allowed to carry out a certain degree of activity. At this time, the patient can apply external force to the affected part by slight pressure or movements in daily life (such as light activities or occasional shaking of the affected part). The action of the external force 12 is transmitted to the shape memory alloy micro-movement part 500 through the cavity position 4301 of the bone plate 1 and the cavity position 4302 of the bone screw 3, thereby exciting micro-vibration.

[0077] In this embodiment, the bone plate 1201 used has a thickness of 2 mm, a width of 10 mm, and a length of 60 mm, which is suitable for fixation of the fracture site. The bone plate 1 is provided with a bone screw 3 hole 11, which allows the bone screw 3 to be firmly installed. The bone screw 3 has a diameter of 5 mm and a length of 40 mm, which is selected according to the bone density of the fracture site and the required stability.

[0078] During this process, the generation of micro-vibrations is more dependent on the patient's daily activities and external force stimulation. Slight movements or pressures cause the shape memory alloy micro-movement parts to deform, and the amplitude of the generated micro-vibrations is 0 to 1 mm. These micro-vibrations will drive the entire surgical area to micro-move, which will help the healing and recovery of the fracture area. In this way, patients can continue to promote bone healing and accelerate recovery without exceeding the recovery limit.

[0079] During this stage, micro-vibrations stimulate the shape memory alloy micro-movements through natural daily activities, enhancing local blood flow and bone cell repair. Compared with electrical stimulation, this external force stimulation method is more natural and easier for patients to control autonomously during the recovery process.

[0080] The fracture internal fixation micro-motion system of the present invention is to build shape memory alloy micro-movement parts in the bone plate 1 and the bone screw 3, and use micro-current or external force stimulation to control the micro-vibration, wherein the micro-current control micro-vibration is mainly used within five weeks after the operation, the patient cannot over-move, the electrode sheet is attached to the skin by using the path formed by the positive and negative electrodes 7, and finally transmitted to the bone screw 3 bone plate 1 through the muscle, and then transmitted to the internal shape memory alloy micro-movement parts to generate micro-vibration; the external force stimulation control micro-vibration is mainly used after five weeks after the operation, at this time, the patient's affected part can be moved to a certain extent, the patient can gently press the ancient screw bone plate 1, or the shape memory alloy micro-movement parts and the small space where they are stored collide during the patient's usual activities, and the shape memory alloy can be made to generate micro-vibration by external force, thereby driving the bone plate 1 and the bone screw 3 to achieve the micro-motion effect. The device adopts high biocompatibility materials, and the micro-vibration can not only promote blood circulation and cell repair at the fracture site, but also accelerate the recovery of the patient.

[0081] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0082] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0083] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0084] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro-motion control system for a fracture, comprising: a bone plate, the bone plate being attached to the fracture, a bone screw that passes through the bone plate and is positioned adjacent to the fracture, A cavity is provided in the bone screw and / or the bone plate, and a memory alloy body is provided in the cavity. The memory alloy body drives the bone plate and / or the bone screw to micro-vibrate through deformation.

2. The in-fold micro-motion control system according to claim 1, characterized in that: It also includes an electrode, which is electrically connected to the memory alloy body through the human body outside the body, and the current of the electrode controls the deformation degree of the memory alloy body, and the deformation degree of the memory alloy drives the bone screw and / or the bone plate to micro-vibrate.

3. The micro-motion control system in fracture according to claim 2, characterized in that: The electrodes include a positive electrode and a negative electrode. The positive electrode and the negative electrode are respectively arranged as electrode sheets. The current of the electrodes is 1 mA to 10 mA.

4. The micro-motion control system in fracture according to claim 2, characterized in that: The micro-vibration amplitude of the bone screw is 0 mm to 1 mm.

5. The micro-motion control system in fracture according to claim 2, characterized in that: The bone plate has a thickness of 1 mm to 3 mm, a width of 5 mm to 15 mm, and a length of 40 mm to 70 mm.

6. The micro-motion control system in fracture according to claim 2, characterized in that: The bone screw has a diameter of 3 mm to 6 mm and a length of 30 mm to 50 mm.

7. The micro-motion control system in fracture according to claim 2, characterized in that: The material of the shape memory alloy body includes nickel-titanium alloy, copper-zinc-aluminum alloy, copper-aluminum-nickel alloy, iron-manganese-silicon alloy, iron-platinum alloy or high entropy shape memory alloy.

8. The micro-motion control system in fracture according to claim 2, characterized in that: The electrode is connected to a current controller, and the current controller regulates the current of the electrode according to the fracture healing process.

9. The micro-motion control system in fracture according to claim 8, characterized in that: The current controller includes a sensor that monitors the progress of bone fracture healing.

10. A method for micro-motion control in fracture, characterized in that: Using the intra-fracture micro-motion control system according to any one of claims 2 to 9 comprises the following steps: Starting the electrode so that the current of the electrode is electrically connected to the memory alloy body through the human body, and adjusting the current of the electrode according to the fracture healing process; The memory alloy body is stimulated to continuously deform by a changing electric current, and the deformation of the memory alloy body drives the bone plate and / or bone screw to micro-vibrate.

Images