CN109157306B - Method and device for adjusting knee joint prosthesis - Google Patents
Method and device for adjusting knee joint prosthesis Download PDFInfo
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- CN109157306B CN109157306B CN201811216930.5A CN201811216930A CN109157306B CN 109157306 B CN109157306 B CN 109157306B CN 201811216930 A CN201811216930 A CN 201811216930A CN 109157306 B CN109157306 B CN 109157306B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/3094—Designing or manufacturing processes
- A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4657—Measuring instruments used for implanting artificial joints
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Abstract
The invention discloses a method and a device for adjusting a knee joint prosthesis. Wherein, the method comprises the following steps: acquiring contact data of a condylar surface contact area of a current knee prosthesis, wherein the contact data at least comprises: contact stress and contact area; acquiring physiological demand data of a target object; and determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the physiological requirement data. The invention solves the technical problem that the prior art can not improve and adjust the knee joint prosthesis aiming at different patients, so that the knee joint prosthesis meeting the individual requirements of users can not be provided.
Description
Technical Field
The invention relates to the technical field of medical treatment, in particular to a method and a device for adjusting a knee joint prosthesis.
Background
With the gradual improvement of living standard and medical standard, the requirement of people for personalized medical treatment is also gradually increased. In the technical field of knee joint replacement, the performance of the existing knee joint prosthesis aims at recovering the physiological motion performance of the knee joint of a patient, and the knee joint prosthesis components with volume production are mainly selected, so that the knee joint prosthesis has the advantages of large production capacity and capability of meeting the market demand in a short time.
However, the existing knee joint prosthesis only focuses on improving the physiological motion performance of the knee joint of the patient, and does not adopt different improvement modes aiming at different patients, and the advantage characteristics of the personalized implanted prosthesis still lack, so that the knee joint prosthesis which meets the personalized requirements of the user cannot be provided for the user.
Aiming at the problem that the prior art cannot improve and adjust the knee joint prosthesis aiming at different patients, so that the knee joint prosthesis meeting the personalized requirements of users cannot be provided, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for adjusting a knee joint prosthesis, which are used for at least solving the technical problem that the prior art can not improve and adjust the knee joint prosthesis aiming at different patients, so that the knee joint prosthesis meeting the personalized requirements of users can not be provided.
According to an aspect of an embodiment of the present invention, there is provided a method of adjusting a knee joint prosthesis, including: acquiring contact data of a condylar surface contact area of a current knee prosthesis, wherein the contact data at least comprises: contact stress and contact area; acquiring physiological demand data of a target object; and determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the physiological requirement data.
Further, the curvature of the curved surface at least includes: a first curvature of the femoral component of the current knee prosthesis, and a second curvature of the tibial component of the current knee prosthesis.
Further, obtaining contact data for the condylar surface contact region of the current knee prosthesis comprises: acquiring gait information of the target object, and joint surface geometric information and material attribute data of the current knee joint prosthesis, wherein the gait information at least comprises: joint effort and joint bend angle; determining said condylar-surface contact area based on said joint flexion angle; determining a first radius of curvature and a second radius of curvature of said condylar-surface contact region based on said articular surface geometry information, wherein said first radius of curvature is a radius of curvature of said femoral prosthetic component and said second radius of curvature is a radius of curvature of said tibial prosthetic component; the contact data is calculated based on the joint force, the first radius of curvature, the second radius of curvature, and the material property data.
Further, the material property data at least includes: modulus of elasticity and poisson's ratio; the above contact data is calculated by the following formula:
wherein R is1Is the first radius of curvature, R2Is as followsThe second radius of curvature, P is the joint force, E1Is the modulus of elasticity, E, of the femoral prosthetic component described above2Is the modulus of elasticity, μ, of the tibial prosthetic component described above1Poisson ratio, mu, of the femoral prosthetic component described above2Poisson's ratio, q, of the tibial prosthetic component described above0For the contact stress, a is a contact circle radius used for calculating the contact area.
Further, determining whether to adjust the curvature of the current knee prosthesis based on the contact data and the physiological requirement data comprises: determining whether the exposure data meets the requirements of the physiological need data; determining to adjust the curvature of the curved surface of the current knee joint prosthesis under the condition that the contact data does not meet the requirement of the physiological requirement data; determining that no adjustment to the curvature of the current knee prosthesis is required in the event that the contact data meets the requirements of the physiological requirement data.
Further, after determining to adjust the curvature of the current knee prosthesis, the method further comprises: determining the complex condyle curved surface of the prosthesis component of the target knee joint prosthesis based on the adjustment result of the curvature of the curved surface of the current knee joint prosthesis; determining other portions of the target knee prosthesis based on knee scan data of the target subject, wherein the other portions are portions of the target knee prosthesis other than the complex condylar curvature of the prosthesis component; combining said complex condylar curvature of said prosthetic component with said other portion to obtain said target knee prosthesis.
Further, determining the complex condyle curved surface of the prosthesis component according to a metal 3D printing technology or a multi-axis numerical control machine tool machining technology.
Further, in the adjusting of the curvature of the current knee joint prosthesis, the method further includes: adjusting the curvature of the curved surface based on a target adjustment principle, wherein the target adjustment principle comprises at least one of the following: minimization of contact stress, stability and flexibility of the above physiological need data.
There is also provided, in accordance with another aspect of an embodiment of the present invention, apparatus for adjusting a knee joint prosthesis, including: a first obtaining module, configured to obtain contact data of a condylar surface contact area of a current knee joint prosthesis, where the contact data at least includes: contact stress and contact area; the second acquisition module is used for acquiring physiological demand data of the target object; and the determining module is used for determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the physiological requirement data.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium, the storage medium includes a stored program, wherein when the program runs, the storage medium is controlled to execute any one of the above adjusting methods for adjusting a knee joint prosthesis.
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, wherein the program is executed to perform any one of the above-mentioned adjustment methods for adjusting a knee joint prosthesis.
In an embodiment of the present invention, contact data of the condylar surface contact area of the current knee prosthesis is obtained, wherein the contact data at least comprises: contact stress and contact area; acquiring physiological demand data of a target object; according to the contact data and the physiological requirement data, whether the curve curvature of the current knee joint prosthesis is adjusted or not is determined, the curve curvature adjustment is carried out on the joint contact curve which influences the knee joint movement and the contact mechanics performance, and the purpose that the adjusted knee joint prosthesis can meet the requirement that a patient keeps a good mechanical environment in different knee joint movement states is achieved, so that the technical effect that the personalized knee joint prosthesis meeting the daily movement requirements of different patients is rebuilt is achieved, and the technical problem that the knee joint prosthesis meeting the personalized requirements of the user cannot be provided due to the fact that the knee joint prosthesis cannot be improved and adjusted by aiming at different patients in the prior art is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of adjusting a knee prosthesis according to an embodiment of the present invention;
FIG. 2 is a flow chart of an alternative method of adjusting a knee prosthesis according to an embodiment of the present invention;
FIG. 3 is a schematic view of an alternative adjustable knee prosthesis according to embodiments of the present invention;
FIG. 4 is a schematic view of an alternative adjustable knee prosthesis according to embodiments of the present invention;
FIG. 5 is a schematic diagram of a device for adjusting a knee prosthesis according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided an embodiment of a method of adjusting a knee joint prosthesis, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system, such as a set of computer-executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than presented herein.
Fig. 1 is a flow chart of a method of adjusting a knee joint prosthesis according to an embodiment of the present invention, as shown in fig. 1, the method comprising the steps of:
step S102, obtaining contact data of a condylar curve contact area of a current knee joint prosthesis, wherein the contact data at least comprises: contact stress and contact area;
step S104, acquiring physiological demand data of a target object;
and step S106, determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the physiological requirement data.
In an embodiment of the present invention, contact data of the condylar surface contact area of the current knee prosthesis is obtained, wherein the contact data at least comprises: contact stress and contact area; acquiring physiological demand data of a target object; according to the contact data and the physiological requirement data, whether the curve curvature of the current knee joint prosthesis is adjusted or not is determined, the curve curvature adjustment is carried out on the joint contact curve which influences the knee joint movement and the contact mechanics performance, and the purpose that the adjusted knee joint prosthesis can meet the requirement that a patient keeps a good mechanical environment in different knee joint movement states is achieved, so that the technical effect that the personalized knee joint prosthesis meeting the daily movement requirements of different patients is rebuilt is achieved, and the technical problem that the knee joint prosthesis meeting the personalized requirements of the user cannot be provided due to the fact that the knee joint prosthesis cannot be improved and adjusted by aiming at different patients in the prior art is solved.
Optionally, the current knee joint prosthesis is an artificial knee joint, and joint pain and functional disorder can be caused due to damage of the human knee joint, so that joint functions can be effectively reconstructed through artificial knee joint replacement, and the life quality of a patient is improved.
Alternatively, the current knee joint prosthesis may include, but is not limited to, a femoral joint prosthesis, a tibial joint prosthesis, a femoral condyle, a tibial tray, a tibial pad, a patella prosthesis, and the like, and the material property data (material) of the knee joint prosthesis may include, but is not limited to: metals (e.g., titanium alloys, cobalt chromium molybdenum alloys, etc.) and plastics (e.g., highly crosslinked polyethylene, etc.).
Optionally, the target object is a patient needing to perform personalized adjustment and reconstruction of a knee joint prosthesis, or a patient needing to perform knee joint replacement; the physiological requirement data at least comprises: knee joint physiological function requirements, e.g., knee joint flexion angle; living and sports needs, etc.
In an embodiment of the present application, the condylar-surface contact area is a femoral condylar-surface contact area, and specifically, a contact area between a femoral joint prosthesis and a tibial joint prosthesis, and the contact data at least includes: contact stress and contact area.
In an alternative embodiment, the curvature of the curved surface at least includes: a first curvature of the femoral component of the current knee prosthesis, and a second curvature of the tibial component of the current knee prosthesis.
In an alternative embodiment, according to the theory of contact mechanics, the joint contact between the femoral joint prosthesis and the tibial joint prosthesis in the current knee joint prosthesis can be simplified into the contact between two curved surfaces with different curvatures, and when the contact conditions, such as the curvature radius of the curved surfaces, the magnitude of external force, the properties of contact materials, and the like, are known, the contact stress and the contact area between the femoral prosthesis component and the tibial prosthesis component of the current knee joint prosthesis in the current contact state can be calculated.
In the above alternative embodiments of the present application, the contact stress and the contact area between the femoral prosthetic component and the tibial prosthetic component can be changed by adjusting the curvature of the curved surface of the knee joint prosthesis, i.e., the contact environment between the femoral prosthetic component and the tibial prosthetic component is improved.
In an alternative embodiment, obtaining contact data for the condylar surface contact region of the current knee prosthesis comprises:
step S202, acquiring gait information of the target object, and joint surface geometric information and material attribute data of the current knee joint prosthesis, wherein the gait information at least includes: joint effort and joint bend angle;
step S204, determining the condyle curved surface contact area based on the joint bending angle;
step S206, determining a first radius of curvature and a second radius of curvature of the condylar surface contact area according to the joint surface geometric information, wherein the first radius of curvature is the radius of curvature of the femoral prosthetic component, and the second radius of curvature is the radius of curvature of the tibial prosthetic component;
in step S208, the contact data is calculated based on the joint acting force, the first radius of curvature, the second radius of curvature, and the material property data.
In an optional embodiment, the gait information at least includes: joint effort and joint bend angle; the above-mentioned geometrical information of articular surface at least includes: radius of curvature of the contact curved surface; the material property data is determined by the material of the current knee joint prosthesis, and is usually cobalt-chromium-molybdenum alloy, high molecular polyethylene material, etc.
Alternatively, but not limited to, the gait information of the patient may be measured by a gait dynamometric system (or a gait analysis system) to obtain the joint acting force (i.e., the magnitude of the external force) and the joint bending angle (i.e., the knee bending angle), as shown in fig. 3, and the embodiment of the present application may further adjust the position of the knee joint prosthesis according to the gait information.
As an alternative embodiment, the gait information of the patient is measured to obtain the joint acting force information of the patientInformation of joint bending angle, positioning the condylar curve contact area of the current knee joint prosthesis according to the measured information of the joint bending angle, and obtaining the first curvature radius R of the curved surface of the femoral prosthesis component of the condylar curve contact area according to the geometrical information of the joint surface of the current knee joint prosthesis1And a second radius of curvature R of the curved surface of the tibial prosthetic component2。
As shown in fig. 4, the above steps can simplify the contact model of the knee joint prosthesis into a contact calculation model, and further, the embodiment of the present application can calculate the joint acting force P and the first curvature radius R1And a second radius of curvature R2Material property data (E)1、E2、μ1、μ2) Obtaining a contact stress q0And a contact circle radius a, wherein the contact area can be obtained based on the contact circle radius a.
In an alternative embodiment, the material property data at least includes: modulus of elasticity and poisson's ratio; the above contact data is calculated by the following formula:
wherein R is1Is the first radius of curvature, R2At the second radius of curvature, P is the joint force, E1Is the modulus of elasticity, E, of the femoral prosthetic component described above2Is the modulus of elasticity, μ, of the tibial prosthetic component described above1Poisson ratio, mu, of the femoral prosthetic component described above2Poisson's ratio, q, of the tibial prosthetic component described above0For the contact stress, a is a contact circle radius used for calculating the contact area.
In an alternative embodiment, determining whether to adjust the curvature of the current knee prosthesis based on the contact data and the physiological requirement data comprises:
step S302, determining whether the contact data meets the requirement of the physiological requirement data;
step S304, determining to adjust the curvature of the curved surface of the current knee joint prosthesis under the condition that the contact data does not meet the requirement of the physiological requirement data;
step S306, determining that the curvature of the current knee joint prosthesis does not need to be adjusted when the contact data meets the requirement of the physiological requirement data.
As an alternative embodiment, but not limited to, determining the required stability and flexibility of the target subject at various angles of knee joint bending according to the actual physiological requirement data of the target subject, and determining whether the contact data meets the requirement of the physiological requirement data, and in the case that the contact data does not meet the requirement of the physiological requirement data, determining to adjust the curvature of the curved surface of the current knee joint prosthesis, wherein in the adjusting process, the principle of minimizing the contact stress is maintained, so as to reduce the wear risk of the knee joint prosthesis. Determining that no adjustment to the curvature of the current knee prosthesis is required in the event that the contact data meets the requirements of the physiological requirement data.
In an alternative embodiment, during the adjusting of the curvature of the current knee prosthesis, the method further comprises: adjusting the curvature of the curved surface based on a target adjustment principle, wherein the target adjustment principle comprises at least one of the following: minimization of contact stress, stability and flexibility of the above physiological need data.
In an alternative embodiment, after determining the adjustment to the curvature of the current knee prosthesis, the method further comprises:
and S402, determining the complex condyle curved surface of the prosthesis component of the target knee joint prosthesis based on the adjustment result of the curved surface curvature of the current knee joint prosthesis.
In an alternative embodiment, the complex condyle curved surface of the prosthesis component is determined according to a metal 3D printing technology or a multi-axis numerical control machining technology.
Step S404, determining other parts of the target knee joint prosthesis according to the knee joint scanning data of the target object, wherein the other parts are the parts of the target knee joint prosthesis except the complex condyle curved surface of the prosthesis component;
step S406, combining the complex condyle curved surface of the prosthesis component and the other parts to obtain the target knee joint prosthesis.
Optionally, the knee joint scan data may be, but is not limited to, CT scan image data, and the other part of the target knee joint prosthesis may be determined by performing bone morphology measurement on the knee joint scan data of the target object.
The application provides a personalized reconstruction method of a knee joint prosthesis, which can combine the advantages of the prior mass production process and the advantages of the personalized medical treatment in two aspects, and not only does not change the basic structure of the knee joint greatly by adjusting the curvature of a joint contact curved surface influencing the motion and contact force performance of the knee joint, thereby ensuring the basic structure of a knee joint product model, but also ensuring that the adjusted knee joint prosthesis can meet the requirement that a patient keeps a good mechanical environment in different knee joint motion states.
According to the embodiment of the application, the gait information of the patient is brought in by using the geometrical shape information of the condyle curved surface of the knee joint prosthesis, and the contact pressure and the contact area between the joint contact surfaces of the knee joint prosthesis are evaluated when the patient uses the knee joint prosthesis. According to the material abrasion principle, the contact pressure of the joint contact surface is reduced as much as possible, so that the abrasion risk of the material is reduced, and the survival time of the prosthesis is prolonged.
Furthermore, since the contact area between the individual joint components influences the kinematics of the knee prosthesis, a constantly changing kinematics is required for the knee prosthesis under different kinematics conditions. Therefore, the embodiment of the application can be used for collecting the information of the patient and reconstructing the personalized knee joint prosthesis meeting the daily movement requirements of different patients.
Example 2
There is also provided an embodiment of an apparatus for performing the method of adjusting a knee joint prosthesis according to an embodiment of the present invention, fig. 5 is a schematic structural view of an apparatus for adjusting a knee joint prosthesis according to an embodiment of the present invention, as shown in fig. 5, the apparatus for adjusting a knee joint prosthesis including: a first acquisition module 50, a second acquisition module 52, and a determination module 54, wherein:
a first obtaining module 50 for obtaining contact data of a condylar surface contact area of a current knee prosthesis, wherein the contact data at least includes: contact stress and contact area; a second obtaining module 52, configured to obtain physiological requirement data of the target subject; a determination module 54 for determining whether to adjust the curvature of the current knee prosthesis based on the contact data and the physiological requirement data.
It should be noted that the above modules may be implemented by software or hardware, for example, for the latter, the following may be implemented: the modules can be located in the same processor; alternatively, the modules may be located in different processors in any combination.
It should be noted here that the first acquiring module 50, the second acquiring module 52 and the determining module 54 correspond to steps S102 to S106 in embodiment 1, and the modules are the same as the corresponding steps in implementation examples and application scenarios, but are not limited to the disclosure in embodiment 1. It should be noted that the modules described above may be implemented in a computer terminal as part of an apparatus.
It should be noted that, reference may be made to the relevant description in embodiment 1 for alternative or preferred embodiments of this embodiment, and details are not described here again.
The above-mentioned apparatus for adjusting a knee joint prosthesis may further comprise a processor and a memory, wherein the above-mentioned first obtaining module 50, second obtaining module 52, determining module 54, etc. are stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize the corresponding functions.
The processor comprises a kernel, and the kernel calls a corresponding program unit from the memory, wherein one or more than one kernel can be arranged. The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
According to the embodiment of the application, the embodiment of the storage medium is also provided. Optionally, in this embodiment, the storage medium includes a stored program, and when the program is executed, the apparatus on which the storage medium is controlled performs any one of the above methods for adjusting a knee joint prosthesis.
Optionally, in this embodiment, the storage medium may be located in any one of a group of computer terminals in a computer network, or in any one of a group of mobile terminals, and the storage medium includes a stored program.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: acquiring contact data of a condylar surface contact area of a current knee prosthesis, wherein the contact data at least comprises: contact stress and contact area; acquiring physiological demand data of a target object; and determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the physiological requirement data.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: acquiring gait information of the target object, and joint surface geometric information and material attribute data of the current knee joint prosthesis, wherein the gait information at least comprises: joint effort and joint bend angle; determining said condylar-surface contact area based on said joint flexion angle; determining a first radius of curvature and a second radius of curvature of said condylar-surface contact region based on said articular surface geometry information, wherein said first radius of curvature is a radius of curvature of said femoral prosthetic component and said second radius of curvature is a radius of curvature of said tibial prosthetic component; the contact data is calculated based on the joint force, the first radius of curvature, the second radius of curvature, and the material property data.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: the above contact data is calculated by the following formula:
wherein R is1Is the first radius of curvature, R2At the second radius of curvature, P is the joint force, E1Is the modulus of elasticity, E, of the femoral prosthetic component described above2Is the modulus of elasticity, μ, of the tibial prosthetic component described above1Poisson ratio, mu, of the femoral prosthetic component described above2Poisson's ratio, q, of the tibial prosthetic component described above0For the contact stress, a is a contact circle radius used for calculating the contact area.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: determining whether the exposure data meets the requirements of the physiological need data; determining to adjust the curvature of the curved surface of the current knee joint prosthesis under the condition that the contact data does not meet the requirement of the physiological requirement data; determining that no adjustment to the curvature of the current knee prosthesis is required in the event that the contact data meets the requirements of the physiological requirement data.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: determining the complex condyle curved surface of the prosthesis component of the target knee joint prosthesis based on the adjustment result of the curvature of the curved surface of the current knee joint prosthesis; determining other portions of the target knee prosthesis based on knee scan data of the target subject, wherein the other portions are portions of the target knee prosthesis other than the complex condylar curvature of the prosthesis component; combining said complex condylar curvature of said prosthetic component with said other portion to obtain said target knee prosthesis.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: and determining the complex condyle curved surface of the prosthesis component according to a metal 3D printing technology or a multi-axis numerical control machine tool machining technology.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: adjusting the curvature of the curved surface based on a target adjustment principle, wherein the target adjustment principle comprises at least one of the following: minimization of contact stress, stability and flexibility of the above physiological need data.
According to the embodiment of the application, the embodiment of the processor is also provided. Optionally, in this embodiment, the processor is configured to execute a program, wherein the program is executed to perform any one of the above methods for adjusting a knee joint prosthesis.
The embodiment of the application provides equipment, the equipment comprises a processor, a memory and a program which is stored on the memory and can run on the processor, and the following steps are realized when the processor executes the program: acquiring contact data of a condylar surface contact area of a current knee prosthesis, wherein the contact data at least comprises: contact stress and contact area; acquiring physiological demand data of a target object; and determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the physiological requirement data.
Optionally, when the processor executes a program, gait information of the target object, and joint surface geometry information and material attribute data of the current knee joint prosthesis may be further acquired, where the gait information at least includes: joint effort and joint bend angle; determining said condylar-surface contact area based on said joint flexion angle; determining a first radius of curvature and a second radius of curvature of said condylar-surface contact region based on said articular surface geometry information, wherein said first radius of curvature is a radius of curvature of said femoral prosthetic component and said second radius of curvature is a radius of curvature of said tibial prosthetic component; the contact data is calculated based on the joint force, the first radius of curvature, the second radius of curvature, and the material property data.
Optionally, when the processor executes a program, the contact data may be calculated by the following formula:
wherein R is1Is the first radius of curvature, R2At the second radius of curvature, P is the joint force, E1Is the modulus of elasticity, E, of the femoral prosthetic component described above2Is the modulus of elasticity, μ, of the tibial prosthetic component described above1Poisson ratio, mu, of the femoral prosthetic component described above2Poisson's ratio, q, of the tibial prosthetic component described above0For the contact stress, a is a contact circle radius used for calculating the contact area.
Optionally, when the processor executes the program, it may further determine whether the contact data meets the requirement of the physiological requirement data; determining to adjust the curvature of the curved surface of the current knee joint prosthesis under the condition that the contact data does not meet the requirement of the physiological requirement data; determining that no adjustment to the curvature of the current knee prosthesis is required in the event that the contact data meets the requirements of the physiological requirement data.
Optionally, when the processor executes the program, the complex condyle curved surface of the prosthesis component of the target knee joint prosthesis can be determined based on the adjustment result of the curvature of the curved surface of the current knee joint prosthesis; determining other portions of the target knee prosthesis based on knee scan data of the target subject, wherein the other portions are portions of the target knee prosthesis other than the complex condylar curvature of the prosthesis component; combining said complex condylar curvature of said prosthetic component with said other portion to obtain said target knee prosthesis.
Optionally, when the processor executes the program, the complex condyle curved surface of the prosthesis component may be determined according to a metal 3D printing technology or a multi-axis numerical control machining technology.
Optionally, when the processor executes the program, the curvature of the curved surface may be adjusted based on a target adjustment principle, where the target adjustment principle includes at least one of: minimization of contact stress, stability and flexibility of the above physiological need data.
The present application further provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: acquiring contact data of a condylar surface contact area of a current knee prosthesis, wherein the contact data at least comprises: contact stress and contact area; acquiring physiological demand data of a target object; and determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the physiological requirement data.
Optionally, when the computer program product executes a program, gait information of the target object, and joint surface geometry information and material attribute data of the current knee joint prosthesis may be further acquired, where the gait information at least includes: joint effort and joint bend angle; determining said condylar-surface contact area based on said joint flexion angle; determining a first radius of curvature and a second radius of curvature of said condylar-surface contact region based on said articular surface geometry information, wherein said first radius of curvature is a radius of curvature of said femoral prosthetic component and said second radius of curvature is a radius of curvature of said tibial prosthetic component; the contact data is calculated based on the joint force, the first radius of curvature, the second radius of curvature, and the material property data.
Optionally, when the computer program product executes a program, the contact data may be calculated by the following formula:
wherein R is1Is the first radius of curvature, R2At the second radius of curvature, P is the joint force, E1Is the modulus of elasticity, E, of the femoral prosthetic component described above2Is the modulus of elasticity, μ, of the tibial prosthetic component described above1Poisson ratio, mu, of the femoral prosthetic component described above2Poisson's ratio, q, of the tibial prosthetic component described above0A is the above contact stressThe radius of the contact circle used to calculate the above contact area.
Optionally, when the computer program product executes a program, it may further determine whether the contact data meets the requirement of the physiological requirement data; determining to adjust the curvature of the curved surface of the current knee joint prosthesis under the condition that the contact data does not meet the requirement of the physiological requirement data; determining that no adjustment to the curvature of the current knee prosthesis is required in the event that the contact data meets the requirements of the physiological requirement data.
Optionally, when the computer program product executes a program, the complex condyle surface of the prosthesis component of the target knee prosthesis can be determined based on the adjustment result of the curvature of the current knee prosthesis; determining other portions of the target knee prosthesis based on knee scan data of the target subject, wherein the other portions are portions of the target knee prosthesis other than the complex condylar curvature of the prosthesis component; combining said complex condylar curvature of said prosthetic component with said other portion to obtain said target knee prosthesis.
Optionally, when the computer program product executes a program, the complex condyle curved surface of the prosthesis component may be determined according to a metal 3D printing technology or a multi-axis numerical control machine processing technology.
Optionally, when the computer program product executes a program, the curvature of the curved surface may be adjusted based on a target adjustment principle, where the target adjustment principle includes at least one of: minimization of contact stress, stability and flexibility of the above physiological need data.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A method of adjusting a knee joint prosthesis, comprising:
acquiring contact data of a condylar surface contact area of a current knee prosthesis, wherein the contact data at least comprises: contact stress and contact area;
acquiring a knee joint prosthesis bending angle of a target object;
determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the bending angle of the knee joint prosthesis;
wherein, in adjusting the curvature of the current knee prosthesis, the method further comprises: adjusting the curvature of the curved surface based on a target adjustment principle, wherein the target adjustment principle is as follows: contact stress is minimized;
determining whether the contact data meets the requirements for the knee joint prosthesis bend angle comprises; determining to adjust the curvature of the curved surface of the current knee joint prosthesis under the condition that the contact data does not meet the requirement of the knee joint prosthesis bending angle; determining that no adjustment to the curvature of the current knee prosthesis is required if the contact data meets the requirements for the knee prosthesis bend angle.
2. The method of claim 1, wherein the curvature of the curved surface comprises at least: a first curvature of the condylar-surface contact area of the femoral prosthetic component of the current knee prosthesis, a second curvature of the condylar-surface contact area of the tibial prosthetic component of the current knee prosthesis.
3. The method of claim 2, wherein acquiring contact data for the condylar surface contact area of the current knee prosthesis comprises:
acquiring gait information of the target object, and joint surface geometric information and material attribute data of the current knee joint prosthesis, wherein the gait information at least comprises: joint effort and joint bend angle;
determining the condyle curved surface contact area based on the joint flexion angle;
determining a first radius of curvature and a second radius of curvature of the condylar surface contact region from the articular surface geometry information, wherein the first radius of curvature is the radius of curvature of the femoral prosthetic component and the second radius of curvature is the radius of curvature of the tibial prosthetic component;
calculating the contact data based on the joint effort, the first radius of curvature, the second radius of curvature, and the material property data.
4. The method of claim 3, wherein the material property data includes at least: modulus of elasticity and poisson's ratio; the contact data is calculated by the following formula:
wherein the content of the first and second substances,
is the first radius of curvature of the first layer,
in order to be said second radius of curvature,
in order to exert the force on the joint,
is the modulus of elasticity of the femoral prosthetic component,
is the modulus of elasticity of the tibial prosthetic component,
for the poisson's ratio of the femoral prosthetic component,
being the poisson's ratio of the tibial prosthetic component,
in order for the contact stress to be the same,
is the contact circle radius used to calculate the contact area.
5. The method of claim 1, wherein after determining to adjust the curvature of the current knee prosthesis, the method further comprises:
determining a prosthesis component complex condyle surface of a target knee prosthesis based on an adjustment result of the curvature of the surface of the current knee prosthesis;
determining other parts of the target knee joint prosthesis according to the knee joint scanning data of the target object, wherein the other parts are the parts of the target knee joint prosthesis except the complex condylar curved surfaces of the prosthesis components;
combining the prosthetic component complex condylar curvature and the other portions to yield the target knee prosthesis.
6. The method of claim 5, wherein the prosthetic component complex condyle curved surface is formed in accordance with a metal 3D printing technique or in accordance with a multi-axis numerical control machining technique.
7. An apparatus for adjusting a knee joint prosthesis, comprising:
a first obtaining module, configured to obtain contact data of a condylar surface contact area of a current knee joint prosthesis, wherein the contact data at least includes: contact stress and contact area;
the second acquisition module is used for acquiring the bending angle of the knee joint prosthesis of the target object;
the determining module is used for determining whether to adjust the curvature of the curved surface of the current knee joint prosthesis according to the contact data and the bending angle of the knee joint prosthesis;
in the process of adjusting the curvature of the curved surface of the current knee joint prosthesis, the device is further configured to adjust the curvature of the curved surface based on a target adjustment principle, where the target adjustment principle is: contact stress is minimized;
wherein the determination module is further configured to determine whether the contact data meets the requirements for the knee joint prosthesis flexion angle comprises; determining to adjust the curvature of the curved surface of the current knee joint prosthesis under the condition that the contact data does not meet the requirement of the knee joint prosthesis bending angle; determining that no adjustment to the curvature of the current knee prosthesis is required if the contact data meets the requirements for the knee prosthesis bend angle.
8. A storage medium, characterized in that the storage medium comprises a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform an adjustment method for adjusting a knee joint prosthesis according to any one of claims 1 to 6.
9. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to perform the adjustment method of adjusting a knee joint prosthesis according to any one of claims 1 to 6 when running.
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