CN112089430A - Method for manufacturing fixing steel plate for fracture and joint replacement patient - Google Patents
Method for manufacturing fixing steel plate for fracture and joint replacement patient Download PDFInfo
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- CN112089430A CN112089430A CN201910457116.0A CN201910457116A CN112089430A CN 112089430 A CN112089430 A CN 112089430A CN 201910457116 A CN201910457116 A CN 201910457116A CN 112089430 A CN112089430 A CN 112089430A
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- 206010017076 Fracture Diseases 0.000 claims description 61
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- 238000004891 communication Methods 0.000 claims description 9
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/50—Clinical applications
- A61B6/505—Clinical applications involving diagnosis of bone
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
Abstract
The invention relates to a method for manufacturing a fixing steel plate for fracture and joint replacement patients, which divides the injured part into symmetry and asymmetry. The production and manufacturing system without symmetry is divided into two cases of long-term wearing without later-stage taking out and short-term wearing. The customized steel plate is designed in a personalized mode under the conditions of different fracture modes or different joint replacements and different states, and the corresponding steel plate suitable for the use state is rapidly prepared according to finite element analysis and reverse 3D printing. Through wireless transmission connection, the production of the series of optimal steel plates which are customized individually through mechanical analysis, ensure the strength of the steel plates, and can estimate the fatigue life in real time and monitor the steel plates in real time is realized. The preparation method ensures the best rehabilitation of patients.
Description
Technical Field
The invention relates to a manufacturing technology of medical auxiliary instruments, in particular to a manufacturing method of a fixing steel plate for fracture and joint replacement patients.
Background
The compression steel plate required by fracture patients and joint replacement patients is a common medical auxiliary instrument. But there is not yet a rapid and efficient steel plate production system. The prior fixed steel plate has the following problems:
1. the fracture can be divided into transverse movement, oblique movement, comminuted fracture, spiral fracture and the like, joint replacement can be divided into hip joint replacement, ankle joint replacement and the like, the mechanical behavior of a patient wearing a steel plate is often different and is difficult to simulate under different fracture modes or different joint replacement conditions and different conditions, the number of screws, the length of the screws and the nail feeding condition required by pressurizing and locking the steel plate in different modes are also different, the stress distribution condition of the fracture part or the joint part of the patient cannot be judged only by the subjective experience of a doctor, and the currently possessed pressurizing steel plate is single, so that the recovery of the patient cannot be guaranteed to be optimal.
2. Surgical implant steel plates required for fracture patients and joint replacement patients are time-efficient, and thus it is required to rapidly produce a pressurized steel plate so as not to miss an optimal treatment period. The problem that a series of steel plates which can be suitable for joint replacement and various types of fractures such as transverse movement, oblique movement, crushing property, spiral type and the like and suitable for patients of different ages such as children, adults and the old are urgently needed to be solved at present is that the steel plates of the series which are already systematic can be quickly called to perform operation on the patients in time under the condition that the number of patients is increased sharply in a short time due to sudden situations such as large disasters or large car accidents.
3. The steel plates required by fracture and joint replacement surgery are also divided into two situations of long-term wearing and short-term wearing, and the requirements on the steel plates are different for different situations. The strength of a steel plate on the market at present is not checked according to the strength of a specified steel plate, and occasionally, the situations that the steel plate is not proper in size during operation, a screw is at a stress concentration position or a bolt falls off and breaks after operation for a period of time occur. Therefore, different types of steel plates are urgently needed to be designed for different patients and strength is checked. The fatigue life of the steel plate is estimated by monitoring various parameters of the steel plate, a reasonable replacement time is provided, and harm is avoided. The steel plate for internal implantation for joint replacement, fracture of elderly people, and fracture of distal humerus (which is likely to cause nerve damage during internal fixation) does not need to be removed, and needs to grow together with the bone in the body, and thus needs to be effectively monitored. When a special condition occurs: the steel plate needs to be replaced by a new steel plate after the operation, such as fracture and bolt fall-off. In the case where the steel plate needs to be removed after a certain period of time, for example, fracture of femoral thigh, etc., it is also necessary to check the strength of the implanted steel plate to prevent the steel plate, bolt, etc. from being broken or detached during the operation or after a certain period of use.
4. At present, the steel plate does not have a specific service life standard, and the loss degree of the steel plate is different when the steel plate is used by everyone and under different emergency conditions, such as impact and the like, so that the service life of the compression steel plate is judged according to the use time and real-time stress conditions of a patient, the personalized steel plate is customized, the service life of the steel plate can be estimated according to different use conditions of the patient, replacement suggestions such as bolt falling can be given when severe conditions are met, and the safety of the patient is ensured.
Disclosure of Invention
The invention provides a method for manufacturing a fixing steel plate for fracture and joint replacement patients, aiming at the problem of the recovery safety of fracture patients and joint replacement patients, which can simulate the mechanical behavior of wearing the steel plate for the patients under different modes of fracture such as transverse movement, oblique movement, crushing, spiral fracture or different joint replacement and asynchronous states such as supporting phase and swinging and the like, obtain an optimal series of steel plate models and ensure the safety of the patients.
The technical scheme of the invention is as follows: a method for manufacturing a fixed steel plate for fracture and joint replacement patients is divided into two steel plate manufacturing methods according to the fact that a wounded part has a symmetrical structure and an asymmetrical structure:
for the steel plate with a symmetrical structure, acquiring CT images of a normal part and an injured part, reversely deducing a steel plate model required by a fracture part through the CT image of the normal part, and quickly producing a suitable steel plate die through a 3D printing technology; the device sequentially comprises a data acquisition module, a reverse backstepping module, a calculation and check module and a 3D printing module; the cloud service platform shares manufacturing data with a 3D printing module steel plate;
for the asymmetric structure, the system is divided into two conditions of long-term wearing and short-term wearing, and the system for long-term wearing sequentially comprises a data acquisition module, a three-dimensional entity construction module, a finite element analysis mechanical module, a calculation and check module, a steel plate manufacturing module, an intensity verification module and a cloud service platform which is connected with the intensity verification module through a wireless transmission system or communication; the system worn in a short term sequentially comprises a data acquisition module, a three-dimensional entity construction module, a finite element analysis mechanical module, a calculation and check module, a steel plate manufacturing module and a cloud service platform connected with the steel plate manufacturing module through a wireless transmission system or communication;
and the calculation and check module calculates and checks the stress, the strength and the bolt pretightening force of the model and continuously optimizes and changes the model until the model is optimal.
The manufacturing method of the patient fixing steel plate for fracture and joint replacement is characterized in that the steel plate is manufactured on an asymmetric structure of an injured part, the data acquisition module comprises a medical image scanning instrument, and the medical image scanning instrument acquires data of the injured part of a patient, such as CT images or MRI images; the data that the data acquisition module was collected still contains the injured part data that medical imaging scanning instrument scanned and obtained including patient's age, weight, human basic data such as height, and through the big data of gathering, to data share different fracture types or different joint replacement types, different age bracket upload to high in the clouds service platform, according to different age brackets and joint replacement type, fracture type classified storage CT image.
The manufacturing method of the fracture and joint replacement patient fixing steel plate is characterized in that the steel plate is manufactured on the injured part in an asymmetric structure, and the three-dimensional entity building module comprises the following steps: importing CT image data obtained by a data acquisition module into software to perform three-dimensional entity reconstruction to obtain a 3D model, importing the 3D model into engineering software, designing different steel plate styles and screw numbers of different fracture types or joint replacement conditions in the engineering software, and assembling the steel plate styles and the screw numbers with the 3D model of the injury of the patient; and (2) sequentially and independently importing the assembled models under different joint replacement types and fracture types into Geomagic optimization software for surface optimization, obtaining NURBS surfaces by removing features, simplifying, deleting nails, gridding doctors, accurately fitting the surfaces and fitting the surfaces, storing the NURBS surfaces into iges format, importing stored iges format files into Hypermesh software for grid division, and storing the stored iges format files into inp format.
The manufacturing method of the fixing steel plate for the fracture and joint replacement patient is characterized in that the steel plate is manufactured on an injured part in an asymmetric structure, and the finite element analysis mechanical module comprises the following steps: the method comprises the steps of finally importing an inp file obtained by meshing a three-dimensional entity construction module into Abaqus or Ansys software, applying force to a model, simulating stress conditions under an asynchronous state and a static state, obtaining a stress cloud picture, then transmitting an obtained mechanical analysis result to a cloud service platform through wireless transmission or communication connection, giving guidance to the model through comparison of latest research progress of external data and a medical algorithm by a cloud processor specific to the cloud service platform, determining the length of a steel plate, the nail feeding position and direction, the number of screw holes, continuously improving the model, returning the model to engineering software for improvement, repeating the operation, and continuously optimizing until the optimal stress cloud picture is obtained in a finite element analysis mechanical stage.
The manufacturing method of the fixed steel plate for the fracture and joint replacement patient is characterized in that the steel plate is manufactured on an injured part in an asymmetric structure, the steel plate manufacturing module is used for producing series steel plate models obtained from different types of different ages by adopting numerical control machine tool machining or other rapid forming machining methods, the best series model is simulated in the finite element analysis mechanics module, the determined length, the nail feeding position and direction and the number of screw holes of the steel plate are sent to a numerical control center, and the series steel plate is manufactured by utilizing a rapid forming technology.
The method for manufacturing the fixed steel plate for the fracture and joint replacement patient comprises the steps of manufacturing the steel plate for the non-symmetrical structure of the injured part, wherein the strength verification module comprises a calculation part and an experiment part, and the calculation comprises the steps of calculating the bolt pretightening force and the steel plate pressure through a mechanical formula to obtain a calculation formula about the model strength; the test comprises the steps that when a batch of steel plates need to be produced, a fatigue test of the steel plates is simulated in a fatigue testing machine, and for the steel plates with determined materials and connection structures, the reasons for influencing the fatigue strength are mainly the number of times of repeated action of load and the ratio of fatigue stress; for the steel plate with symmetrical structure at the injured part, the strength of the steel plate produced by 3D printing needs to be verified as before if the steel plate is used for long-term wearing.
According to the manufacturing method of the fracture and joint replacement patient fixing steel plate, the stress condition of the steel plate is judged through a pressure sensor with biocompatibility and an external three-axis acceleration sensor which are arranged on the steel plate, detected data are returned to a cloud service platform through a wireless transmission system, the service lives of the steel plates obtained through the strength verification module are compared, and the time for the patient to replace the steel plate is given.
The invention has the beneficial effects that: the invention relates to a method for manufacturing a fixed steel plate for fracture and joint replacement patients, which is characterized in that customized steel plates are individually designed under the conditions of different fracture modes or different joint replacements and different states, and corresponding steel plates suitable for use states are rapidly prepared according to finite element analysis and reverse 3D printing; through wireless transmission connection, the production of a series of optimal steel plates which are personalized and customized through mechanical analysis, ensure the strength of the steel plates, estimate the fatigue life in real time, give the damage condition of the steel plates of patients, pre-judge the replacement time of the steel plates before damage and monitor in real time is realized; the preparation method ensures the best rehabilitation of patients.
Drawings
FIG. 1 is a flow chart of the method for manufacturing the steel plate for patients with fracture and joint replacement according to the present invention.
Detailed Description
In order to facilitate understanding of the implementation and structural features of the present invention, the present invention is further explained with reference to the accompanying drawings:
the method for manufacturing the fixed steel plate for the fracture and joint replacement patient comprises two modes of steel plate manufacturing, including a symmetrical structure and an asymmetrical structure at the injured part. And the patients are divided into two cases that the long-term implanted steel plate is not taken out and the short-term implanted steel plate is taken out.
Referring to a flow chart of a manufacturing method of a steel plate for a patient with fracture and joint replacement shown in fig. 1, for a patient with symmetric fracture and joint replacement, taking fracture of a foot or a hand and replacement of an ankle joint and a knee joint as an example, a normal part and an injured part are acquired by CT, a steel plate model required by the fracture part is reversely deduced through a CT image of the normal part, and a suitable steel plate die is rapidly produced through a 3D printing technology. The device sequentially comprises a data acquisition module, a reverse thrust module, a calculation and check module and a 3D printing module. If the wearable device is worn for a long time, the strength verification module needs to be added to judge the service life of the wearable device. And the cloud service platform shares the manufacturing data with the 3D printing module steel plate.
The production and manufacturing subsystem without the symmetrical structure is divided into two conditions of long-term wearing and short-term wearing, and the system worn for a long time sequentially comprises a data acquisition module, a three-dimensional entity construction module, a finite element analysis mechanical module, a calculation and check module, a steel plate manufacturing module, an intensity verification module and a cloud service platform connected with the intensity verification module through a wireless transmission system or communication. The system worn in a short term sequentially comprises a data acquisition module, a three-dimensional entity construction module, a finite element analysis mechanical module, a calculation and check module, a steel plate manufacturing module and a cloud service platform connected with the steel plate manufacturing module through a wireless transmission system or communication. And the cloud service platform shares the manufacturing data with the 3D printing module steel plate. And the calculation and check module calculates and checks the stress, the strength, the bolt pretightening force and the like of the model, and continuously optimizes and changes the model until the model is optimal.
For fracture and joint injury of asymmetric parts, the steel plate is designed through finite element analysis, the determined length, nail feeding position and direction, screw hole number and the like of the steel plate are sent to a numerical control center, and the steel plate is prepared by utilizing a rapid prototyping technology.
The data acquisition module includes a medical image scanning instrument (not shown) such as a magnetic resonance apparatus or a computed tomography system. The medical image scanning instrument acquires data of an injured part of a patient, such as a CT image or an MRI image. The data that the data acquisition module was collected still contains the injured part data that medical imaging scanning instrument scanned and obtained including patient's age, weight, human basic data such as height, through the big data of gathering, falls into different fracture types or different joint replacement types, different age brackets such as child, teenager, adult, old man to upload to high in the clouds service platform to data, according to different age brackets and joint replacement type, fracture type classified storage CT image.
The three-dimensional entity building module comprises the following steps: and (3) importing the data (CT image) obtained by the data acquisition module into software such as Mimics and the like to carry out three-dimensional entity reconstruction, wherein the obtained 3D model can comprise bones, muscles, soft tissues and the like, the 3D model can be imported into engineering software such as Solidworks and the like, different fracture types such as transverse movement, oblique movement, comminuted fracture, spiral fracture and the like or different steel plate styles and screw numbers of joint replacement conditions are designed in SW software, and the SW software is assembled with the 3D model of the wound of the patient. The method comprises the steps of sequentially and independently importing assembled models under different joint replacement types and fracture types into optimization software such as Geomagic and the like for surface optimization, obtaining NURBS surfaces through the steps of removing features, simplifying, deleting nails, gridding doctors, accurate surfaces, fitting the surfaces and the like, storing the NURBS surfaces into an iges format, importing stored iges format files into similar software such as Hypermesh and the like for grid division, and storing the files into an inp format.
The finite element analysis mechanics module has the steps of: the method comprises the steps of finally importing an inp file obtained by meshing a three-dimensional entity construction module into Abaqus or Ansys software, applying force to a model, simulating stress conditions in an asynchronous state and a static state, obtaining a stress cloud picture, then transmitting an obtained mechanical analysis result to a cloud service platform through wireless transmission or communication connection, giving guidance to the model through comparison of latest research progress of external data and a medical algorithm by a cloud processor specific to the cloud service platform, determining the length of a steel plate, the nail feeding position and direction, the number of screw holes and the like, continuously improving the model, returning the model to SW for improvement, repeating the operation, and continuously optimizing until the optimal stress cloud picture is obtained in a finite element analysis mechanical stage.
And the calculation and check module is used for performing strength check by calculating the stress of the steel plate, the pretightening force of the bolt and the like, and returning to the finite element analysis mechanics module when the check is unqualified, so that the model is continuously optimized until the optimal model is obtained.
The steel plate manufacturing module is used for simulating the series of steel plate models obtained from different ages by adopting numerical control machine tool machining or other rapid forming machining methods, the best series of models simulated in the finite element analysis mechanics module is sent to a numerical control center for preparing the steel plate by utilizing a rapid forming technology, wherein the length, the nail feeding position and direction, the number of screw holes and the like of the determined steel plate are determined.
The strength verification module refers to a calculation part and an experiment part, and comprises the steps of calculating bolt pretightening force, steel plate pressure and the like through a mechanical formula to obtain a calculation formula about model strength, wherein the experiment comprises a steel plate fatigue test simulated in a fatigue testing machine when a batch of steel plates need to be produced, and the fatigue strength is mainly influenced by the load repetitive action times and the fatigue stress ratio of the steel plates with determined materials and connection structures. The more the load is repeated, the lower the fatigue strength of the structure,
magnitude of stress ═max－min(ii) a Fatigue stress ratio rho ═min/max；
Determination of fatigue strength: processing n batches of test pieces for the connection forms of the determined steel plates of different classes, and respectively taking the maximum values sigma of different test stresses under the same fatigue stress ratiomaxCalculating the corresponding fatigue failure times N on a fatigue testing machine;
and (3) the obtained data is subjected to a relational expression of the fatigue limit of the pressurizing steel plate and stress, service time and times by adopting methods such as logistic linear regression and the like, and a fitting curve obtained by an experiment is corrected for a calculation result to obtain a calculation formula of the service life of the steel plate, so that an individualized life evaluation basis is given, and effective guidance is given to the wearing condition of a patient at the later stage.
The stress condition of the steel plate is judged through the pressure sensor with biocompatibility and the external triaxial acceleration sensor arranged on the steel plate, detected data are returned to the cloud service platform through the wireless transmission system, the service life of the steel plate obtained by the strength verification module is compared, and the time for the patient to replace the steel plate is given.
The invention divides the patients without symmetric fracture and joint injury into the condition of not taking out the steel plate implanted in the body when the patients wear the steel plate for a long time and the condition of taking out the steel plate when the patients wear the steel plate for a short time. For the case of long-term wearing without taking out the implanted steel plate: the service conditions of the compression steel plate implanted by the patient are monitored through the sensors, including the falling impact times and the like, the service life of the compression steel plate implanted by the patient is calculated through a mechanical formula for pressure, strength and the like, the calculation formula is corrected through a relational expression obtained by simulating a steel plate fatigue test by a fatigue test machine and fitting by logics, the service life of the steel plate implanted by the patient is obtained, the data output by the sensors are substituted into the formula to obtain the period of time for the patient to use the steel plate, and the time for the patient to change is prompted.
The method is different from the condition that the steel plate is not required to be taken out for long-term use, the strength verification module is not required to be carried out on patients who wear the steel plate in a short term and need to take out the implanted steel plate, the fatigue test is simulated by a fatigue testing machine without producing small-batch products, and the service life of the products is not required to be judged. The calculation and check module can finely adjust the steel plate of the patient, and the situation that the screw feeding part is in a stress concentration position due to the fact that the length of the steel plate cannot be adjusted in the operation process is avoided, and therefore the situation that a bolt falls off after the operation occurs.
In the steel plate manufacturing process, the results of the 3D data including mechanical simulation and finite element simulation need to be uploaded to the cloud and compared with the latest research data, and manufacturing guidance suggestions are given until the optimal steel plate which meets the requirements is designed.
The invention has biomechanical guidance technical support for the steel plate manufacturing process, compares the steel plate manufacturing process with the latest research result, and obtains the optimal series of steel plates required under different fracture modes, different dynamic conditions and different joint replacements under the simulation of finite element mechanical analysis software.
The invention sets series steel plates with different types and sizes which can be suitable for most of the current fracture cases by setting different joint replacement types, fracture types, different age groups such as children, teenagers, adults, the elderly and the like, can quickly call the existing database when a large disaster or car accident occurs, and is planned to adopt a numerical control machine tool for mass production after fine adjustment.
The invention provides two modes of steel plate manufacturing modes, which take foot or hand fracture and ankle joint and knee joint replacement as examples, for symmetric steel plates, the fracture part can be reversely deduced through a CT image of a normal part, and a suitable steel plate die can be rapidly produced through a 3D printing technology.
For the fracture or joint replacement injury of the asymmetric part, the steel plate is designed through finite element analysis, the determined length, the nail feeding position and direction, the number of screw holes and the like of the steel plate are sent to a numerical control center, and the steel plate is prepared by utilizing a rapid prototyping technology. The fracture or joint replacement injury of the asymmetric part can be divided into two conditions of taking out the steel plate, namely short-term wearing and long-term wearing without taking out, and the adaptability is strong.
The calculation and check module provided by the invention avoids the occurrence of a nail feeding part at a stress concentration part and avoids the falling of a bolt; the strength verification module predicts the relation between the service life of the steel plate and the service times and time through a fatigue strength testing machine, obtains the service life of the steel plate, guides the time required to be replaced by the patient according to the data obtained by the triaxial acceleration sensor and the pressure sensor, avoids the excessive use of the steel plate, and can remind the patient to go to a hospital to replace before the steel plate can not be used, and avoids new damage.
The implementation method of the steel plate series production and manufacturing system for the fracture is described in combination with the accompanying drawings, so that a complete steel plate series production and manufacturing system with biomechanical analysis and cloud platform monitoring is established for two fracture modes. The above embodiments are described only to help understanding the method of the present invention and the core idea thereof, but the present invention is not limited to the described embodiments, the above listed cases are only examples, the present invention is not limited thereto, and the changes, modifications, substitutions and variations of the embodiments are still within the scope of the present invention without departing from the principle and spirit of the present invention.
Claims (7)
1. A method for manufacturing a fixing steel plate for fracture and joint replacement patients, which is characterized in that,
the method comprises two steel plate manufacturing methods according to the fact that the injured part has a symmetrical structure and an asymmetrical structure:
for the steel plate with a symmetrical structure, acquiring CT images of a normal part and an injured part, reversely deducing a steel plate model required by a fracture part through the CT image of the normal part, and quickly producing a suitable steel plate die through a 3D printing technology; the device sequentially comprises a data acquisition module, a reverse backstepping module, a calculation and check module and a 3D printing module; the cloud service platform shares manufacturing data with a 3D printing module steel plate;
for the asymmetric structure, the system is divided into two conditions of long-term wearing and short-term wearing, and the system for long-term wearing sequentially comprises a data acquisition module, a three-dimensional entity construction module, a finite element analysis mechanical module, a calculation and check module, a steel plate manufacturing module, an intensity verification module and a cloud service platform which is connected with the intensity verification module through a wireless transmission system or communication; the system worn in a short term sequentially comprises a data acquisition module, a three-dimensional entity construction module, a finite element analysis mechanical module, a calculation and check module, a steel plate manufacturing module and a cloud service platform connected with the steel plate manufacturing module through a wireless transmission system or communication;
and the calculation and check module calculates and checks the stress, the strength and the bolt pretightening force of the model and continuously optimizes and changes the model until the model is optimal.
2. The method for manufacturing a patient fixing steel plate for fracture and joint replacement according to claim 1, wherein the steel plate is manufactured for a non-symmetrical structure of the injured part, and the data acquisition module comprises a medical image scanning instrument, and the medical image scanning instrument acquires data of the injured part of the patient, such as a CT image or an MRI image; the data that the data acquisition module was collected still contains the injured part data that medical imaging scanning instrument scanned and obtained including patient's age, weight, human basic data such as height, and through the big data of gathering, to data share different fracture types or different joint replacement types, different age bracket upload to high in the clouds service platform, according to different age brackets and joint replacement type, fracture type classified storage CT image.
3. The method for manufacturing a patient fixing steel plate for fracture and joint replacement according to claim 1 or 2, wherein the steel plate is manufactured for a structure without symmetry at the injured part, and the three-dimensional entity building module: importing CT image data obtained by a data acquisition module into software to perform three-dimensional entity reconstruction to obtain a 3D model, importing the 3D model into engineering software, designing different steel plate styles and screw numbers of different fracture types or joint replacement conditions in the engineering software, and assembling the steel plate styles and the screw numbers with the 3D model of the injury of the patient; and (2) sequentially and independently importing the assembled models under different joint replacement types and fracture types into Geomagic optimization software for surface optimization, obtaining NURBS surfaces by removing features, simplifying, deleting nails, gridding doctors, accurately fitting the surfaces and fitting the surfaces, storing the NURBS surfaces into iges format, importing stored iges format files into Hypermesh software for grid division, and storing the stored iges format files into inp format.
4. The method of claim 3, wherein the finite element analysis mechanics module is configured to: the method comprises the steps of finally importing an inp file obtained by meshing a three-dimensional entity construction module into Abaqus or Ansys software, applying force to a model, simulating stress conditions under an asynchronous state and a static state, obtaining a stress cloud picture, then transmitting an obtained mechanical analysis result to a cloud service platform through wireless transmission or communication connection, giving guidance to the model through comparison of latest research progress of external data and a medical algorithm by a cloud processor specific to the cloud service platform, determining the length of a steel plate, the nail feeding position and direction, the number of screw holes, continuously improving the model, returning the model to engineering software for improvement, repeating the operation, and continuously optimizing until the optimal stress cloud picture is obtained in a finite element analysis mechanical stage.
5. The method for manufacturing a fixed steel plate for patients with fracture and joint replacement according to claim 4, wherein the steel plate is manufactured for the non-symmetrical structure of the injured part, the steel plate manufacturing module is designed to produce series steel plate models obtained from different ages by numerical control machine tool machining or other rapid prototyping methods, the best series model is simulated in the finite element analysis mechanics module, the determined length, nail feeding position and direction and the number of screw holes of the steel plate are sent to a numerical control center, and the series steel plate is manufactured by the rapid prototyping technology.
6. The method for manufacturing a patient fixation plate for fracture and joint replacement according to claim 1, wherein the steel plate is manufactured for a structure without symmetry at the injured part, the strength verification module comprises a calculation part and an experiment part, and the calculation comprises calculating bolt pretightening force and steel plate pressure through a mechanical formula to obtain a calculation formula about model strength; the test comprises the steps that when a batch of steel plates need to be produced, a fatigue test of the steel plates is simulated in a fatigue testing machine, and for the steel plates with determined materials and connection structures, the reasons for influencing the fatigue strength are mainly the number of times of repeated action of load and the ratio of fatigue stress; for the steel plate with symmetrical structure at the injured part, the strength of the steel plate produced by 3D printing needs to be verified as before if the steel plate is used for long-term wearing.
7. The method for manufacturing the patient fixing steel plate for fracture and joint replacement according to claim 6, wherein the stress condition of the steel plate is judged through a pressure sensor with biocompatibility and an external three-axis acceleration sensor which are arranged on the steel plate, detected data are returned to a cloud service platform through a wireless transmission system, the service lives of the steel plates obtained through the strength verification module are compared, and the time for the patient to replace the steel plate is given.
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