CN116747055B - Knee joint prosthesis and manufacturing method thereof - Google Patents
Knee joint prosthesis and manufacturing method thereof Download PDFInfo
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- CN116747055B CN116747055B CN202311042748.3A CN202311042748A CN116747055B CN 116747055 B CN116747055 B CN 116747055B CN 202311042748 A CN202311042748 A CN 202311042748A CN 116747055 B CN116747055 B CN 116747055B
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 122
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 210000003141 lower extremity Anatomy 0.000 claims abstract description 39
- 210000000689 upper leg Anatomy 0.000 claims abstract description 32
- 210000002303 tibia Anatomy 0.000 claims abstract description 31
- 210000003127 knee Anatomy 0.000 claims abstract description 21
- 210000003205 muscle Anatomy 0.000 claims abstract description 19
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 17
- 238000003384 imaging method Methods 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 abstract description 7
- 210000003414 extremity Anatomy 0.000 description 7
- 229910052602 gypsum Inorganic materials 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 208000000474 Poliomyelitis Diseases 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 210000002161 motor neuron Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000000278 spinal cord Anatomy 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 210000004003 subcutaneous fat Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- A61F2/3836—Special connection between upper and lower leg, e.g. constrained
-
- 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
-
- 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
- A61F2002/30943—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 using mathematical models
-
- 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
- A61F2002/3096—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 trimmed or cut to a customised size
-
- 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
- A61F2002/3895—Joints for elbows or knees unicompartimental
Abstract
The invention discloses a knee joint prosthesis and a manufacturing method thereof, comprising the following steps: determining the inflection angle of the knee prosthesis: the muscle strength of the lower limb of the target object is monitored through the measuring device, the force data of the lower limb of the target object is obtained, and when the force data is maximum, the included angle between the long axis of the femur and the long axis of the tibia of the target object is obtained, and the included angle is the inflection angle of the knee joint prosthesis; and acquiring bone data of a lower limb of a target object, drawing a knee joint prosthesis model according to the bone data, adjusting the angle of a stand column on a knee joint spacer in the knee joint prosthesis model according to the inflection angle, enabling the inclination angle of the stand column to be equal to the inflection angle, and manufacturing the knee joint prosthesis according to the knee joint prosthesis model.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a knee joint prosthesis and a manufacturing method thereof.
Background
Poliomyelitis patients, due to the damage of spinal cord anterior horn motor neurons, muscles related to the spinal cord anterior horn motor neurons lose the regulation of nerves and shrink, subcutaneous fat, tendons and bones shrink, and sequelae related to knee joints are marked by the remarkably damaged morphology and functions of the knee joints.
Currently, the approach to treat poliomyelitis knee sequelae is to reconstruct the stability of the knee joint by joint fusion or joint replacement. However, joint fusion can result in limited mobility of the knee; the knee joint replacement can keep the mobility of the knee joint, but the knee joint prosthesis has short service life due to the fact that the knee joint replacement cannot be matched with the residual muscle force of the lower limb of a patient, and the phenomenon of reverse bending of the prosthesis can occur to the patient after operation.
Disclosure of Invention
The invention aims to solve the problem that the conventional knee joint prosthesis cannot be matched with the residual muscle strength of the lower limb of a target object.
The present invention provides a knee joint prosthesis and a method for manufacturing the same for the above technical problems.
The technical scheme of the invention is as follows:
a method of making a knee prosthesis, comprising:
determining the inflection angle of the knee prosthesis: the muscle strength of the lower limb of the target object is monitored through the measuring device, the force data of the lower limb of the target object is obtained, and when the force data is maximum, the included angle between the long axis of the femur and the long axis of the tibia of the target object is obtained, and the included angle is the inflection angle of the knee joint prosthesis;
and acquiring bone data of a lower limb of a target object, manufacturing a knee joint prosthesis model according to the bone data, adjusting the angle of a stand column on a knee joint spacer in the knee joint prosthesis model according to the inflection angle, enabling the inclination angle of the stand column to be equal to the inflection angle, and manufacturing the knee joint prosthesis according to the knee joint prosthesis model.
Preferably, the measuring device is a pressure detecting device; when the lower limb of the target object naturally abuts against the pressure detection device, the pressure reading is maximum, and the force data of the target object is minimum; when the lower limb of the target object is bent from the knee joint to the knee to change the bending angle of the knee joint, the pressure reading gradually decreases along with the stress of the target object, and when the pressure reading reaches the minimum value, the stress data of the target object is maximum.
Preferably, the angle between the long axis of the femur and the long axis of the tibia is obtained by an imaging device or brace.
Preferably, a CT tomogram of a knee joint of a target object is obtained, bone data are obtained through the CT tomogram, the anterior-posterior diameter, the left-right diameter and the inflection angle of a femoral condyle of the target object are measured on the CT tomogram, a three-dimensional diagram of a knee joint prosthesis model matched with the CT tomogram is drawn according to the data, the angle of a stand column on a knee joint pad in the knee joint prosthesis is adjusted in the three-dimensional diagram, the back inclination angle of the stand column is equal to the inflection angle, and the knee joint prosthesis is manufactured according to the three-dimensional diagram.
Preferably, the imaging device is an X-ray projector, when the lower limb of the target object is at the optimal force point, the full-length side position piece of the double lower limbs of the target object is shot by the X-ray projector, and the long axis of femur and the long axis of tibia are selected in the X-ray film for calculation.
Preferably, the angle displayed by the upper wheel disc of the brace is the included angle between the long axis of the femur and the long axis of the tibia.
The knee joint prosthesis is manufactured based on the knee joint prosthesis manufacturing method and comprises a tibia component, a knee joint hinge, a knee joint gasket and a femur component, wherein the tibia component is fixedly connected with the knee joint hinge, the knee joint hinge is movably connected with the knee joint gasket, the knee joint gasket is provided with a curved surface matched with a physiological structure of a human body, and the curved surface is fixedly connected with the femur component which inclines.
Preferably, the inclination angle of the femoral component is 10 ° to 25 °.
Preferably, the inclination angle is 15 °.
Compared with the prior art, the invention has the following advantages and effects:
because the poliomyelitis target object has irreversible damage to the motor neuron, the muscle strength of the lower limb is difficult to maintain normal walking, the invention can match the residual muscle strength of the lower limb of the target object, exert the effect of the residual muscle force of the target object to the greatest extent, exert the best walking function of the lower limb under the control of the limited motor neuron, thereby better recovering the knee joint function and obtaining longer service life of the knee joint prosthesis.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view of the structure of a knee prosthesis of the present invention;
FIG. 2 is a schematic cross-sectional view of a knee joint spacer of example 1;
fig. 3 is a schematic cross-sectional view of a knee joint spacer of the prior art.
Description of the reference numerals
1-a tibial component; 2-knee hinge; 3-knee joint spacer; 4-femoral component; 5-a curved surface; 6-stand columns.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not intended to limit the present invention thereto.
Example 1: a method of making a knee prosthesis, comprising:
determining the inflection angle of the knee prosthesis: the muscle strength of the lower limb of the target object is monitored through the measuring device, the force data of the lower limb of the target object is obtained, and when the force data is maximum, the included angle between the long axis of the femur and the long axis of the tibia of the target object is obtained, and the included angle is the inflection angle of the knee joint prosthesis;
and acquiring bone data of a lower limb of a target object, drawing a knee joint prosthesis model according to the bone data, adjusting the angle of a stand column on a knee joint spacer in the knee joint prosthesis model according to the inflection angle, enabling the inclination angle of the stand column to be equal to the inflection angle, and manufacturing the knee joint prosthesis according to the knee joint prosthesis model.
Preferably, in one embodiment, the measuring device is a pressure detecting device, such as a pressure gauge or manometer. The process of monitoring and acquiring the force data comprises the following steps: the target object is leaned against the wall, the lower limb of the target object is leaned against the measuring device, the affected limb is contacted with the pressure detecting device, the force data is the negative number of the pressure value, for example, when the pressure value is 10N, the force data is-10. When the target object does not exert force in the original state, the affected limb is abutted against the pressure detection device in a natural state (namely, the extremely knee joint is in a reverse bending state), and the pressure value is maximum and the force data is minimum. When the target object starts to exert force, the affected limb is gradually straightened from the extremely knee joint to the knee, and the inflection angle of the knee joint is gradually changed, and the pressure value of the pressure detection device is continuously recorded during the period, for example, the pressure value can be recorded every 10 seconds or 15 seconds. When the pressure reaches the minimum value, the force data is maximum, and the target object can exert the maximum residual muscle force of the lower limb, and the maximum residual muscle force is the optimal force point.
Preferably, in one embodiment, the measuring device is gypsum. The process of monitoring and acquiring the force data comprises the following steps: the knee joint of the target object is fixed by using gypsum, a plurality of pressure sensors are arranged in the gypsum, the pressure sensors are arranged at positions close to the knee joint, the gypsum becomes a measuring device after sizing, the target object wears the gypsum to continuously exert force, when the reading of each pressure sensor is maximum, the force data is maximum at the moment, the target object can exert the maximum residual muscle force of the lower limb, and the point is the optimal force point at the moment.
Preferably, in one embodiment, the measuring device is a constant velocity force gauge. The process of monitoring and acquiring the force data comprises the following steps: the lever of the instrument is driven by the limb to do a great reciprocating motion during the test, the motion speed is preset by the instrument, the muscle force cannot accelerate the motion, the muscle force tension can only be increased, the moment output is increased, the change of the moment is recorded by the instrument, the change of the joint angle is synchronously recorded, a hyperbola is drawn, and the data recording is automatically performed. When the moment is maximum, the force data is maximum, and the target object can exert the maximum residual muscle force of the lower limb, and is the optimal force point.
Preferably, in one embodiment, the inflection angle is determined: when the lower limb of the target object is at the optimal force-generating point, the imaging device is used for shooting the full-length lateral position sheet of the double lower limbs of the target object, the imaging device adopts equipment capable of perspective the human body of the target object, such as an X-ray projector, a long axis of femur and a long axis of tibia are selected from the X-ray film, and the included angle between the long axis of femur and the long axis of tibia is calculated, wherein the included angle is the inflection angle of the knee joint prosthesis. Further, in order to ensure timely recording, in the process of determining the optimal force point, the imaging device continuously shoots the double lower limb full-length side position pieces of the target object.
Preferably, in one embodiment, the inflection angle is determined: the target object is firstly provided with a brace, and when the lower limb of the target object is at an optimal force-exerting point, the angle displayed by the upper wheel disc of the brace is the included angle between the long axis of the femur and the long axis of the tibia, and the included angle is the inflection angle of the knee joint prosthesis.
Preferably, in one embodiment, the prosthesis is manufactured: and (3) shooting CT of double lower limbs of the target object, carrying out three-dimensional inversion on bones of the target object according to scanned CT data, measuring the front-back diameter, the left-right diameter and the inflection angle of femoral condyles of the target object, drawing a three-dimensional drawing of the knee joint prosthesis matched with the target object according to the data, and adjusting the angle of a gasket upright post in a tee joint in the knee joint prosthesis in the drawing and matching the inflection angle with the target object so that the inclination angle of the knee joint prosthesis is equal to the inflection angle. After the adjustment is finished, the knee joint prosthesis is manufactured according to the three-dimensional drawing, and the conventional prosthesis material is selected as the material, and the manufactured knee joint prosthesis is highly matched with the bone structure of the target object due to the fact that the knee joint prosthesis is manufactured after the target object bone is scanned.
Preferably, in one embodiment, a method of manufacturing a knee joint prosthesis comprises:
determining the inflection angle of the knee prosthesis: the target object is leaned against the wall, the lower limb of the target object is leaned against the measuring device, the measuring device is a pressure detecting device, such as a pressure gauge or a pressure gauge, and the affected limb is contacted with the pressure detecting device, the force data is the negative number of the pressure value, for example, when the pressure value is 10N, the force data is-10. When the target object does not exert force in the original state, the affected limb is abutted against the pressure detection device in a natural state (namely, the extremely knee joint is in a reverse bending state), and the pressure value is maximum and the force data is minimum. When the target object starts to exert force, the affected limb is gradually straightened from the extremely knee joint to the knee, and the inflection angle of the knee joint is gradually changed, and the pressure value of the pressure detection device is continuously recorded during the period, for example, the pressure value can be recorded every 10 seconds or 15 seconds. When the pressure reaches the minimum value, the force data is maximum, and the target object can exert the maximum residual muscle force of the lower limb, and the maximum residual muscle force is the optimal force point. The inflection angle is statistically preferably 10 ° to 25 °, more preferably 15 °, for the target object. When the lower limb of the target object is at the optimal force-generating point, the imaging device is used for shooting the full-length lateral position sheet of the double lower limbs of the target object, the imaging device adopts equipment capable of perspective the human body of the target object, such as an X-ray projector, a long axis of femur and a long axis of tibia are selected from the X-ray film, and the included angle between the long axis of femur and the long axis of tibia is calculated, wherein the included angle is the inflection angle of the knee joint prosthesis. Further, in order to ensure timely recording, in the process of determining the optimal force point, the imaging device continuously shoots the double lower limb full-length side position pieces of the target object.
Manufacturing a prosthesis: and (3) shooting CT of the double lower limbs of the target object, carrying out three-dimensional inversion on bones of the target object according to scanned CT data, measuring the anterior-posterior diameter, the left-right diameter and the inflection angle of the femoral condyles of the target object, and drawing a three-dimensional drawing of the knee joint prosthesis matched with the data according to the data. As shown in fig. 1, the knee joint prosthesis comprises a tibia extension rod, a knee joint hinge, a knee joint gasket and a femur extension rod, wherein the tibia extension rod is fixedly connected with one end of the knee joint hinge, the other end of the knee joint hinge is movably connected with the knee joint gasket, an inclined upright post is arranged on the knee joint gasket, and the femur extension rod is fixedly connected with the upright post; in some embodiments, the femoral extension rod is integrally formed with the post, i.e., the post alone is on the knee pad. In the drawing, as shown in fig. 2, the angle of the femoral post in the knee joint prosthesis is adjusted to enable the femoral post to incline backward, so that the inclination angle of the femoral post is equal to the inflection angle. After the adjustment is finished, the knee joint prosthesis is manufactured according to the three-dimensional drawing, and the conventional prosthesis material is selected as the material, and the manufactured knee joint prosthesis is highly matched with the bone structure of the target object due to the fact that the knee joint prosthesis is manufactured after the target object bone is scanned.
As shown in fig. 3, the upright post on the conventional knee joint spacer is in a vertical state, and the inflection angle is 0 °, and the angle cannot match the residual muscle force of the lower limb of the target object, so that the knee joint prosthesis is subject to buckling when force is applied, and the service life of the prosthesis is shortened. The method for treating the target object of the poliomyelitis knee joint sequela can greatly shorten the postoperative recovery time and prolong the service life of the prosthesis. The estimated time of recovery after operation can be shortened by more than 1 day, and the service life of the prosthesis can be prolonged by more than 1 year.
The knee joint prosthesis is manufactured based on the knee joint prosthesis manufacturing method, and comprises a tibia component 1, a knee joint hinge 2, a knee joint gasket 3 and a femur component 4, wherein the knee joint hinge 2 is fixedly connected with the tibia component 1, the tibia component 1 and the knee joint hinge 2 are connected into a whole through screws, the knee joint hinge 2 is movably connected with the knee joint gasket 3, the knee joint gasket 3 is provided with a curved surface 5 matched with the physiological structure of a human body, the curved surface 5 is fixedly connected with the inclined femur component 4, and the knee joint gasket 3 and the femur component 4 are connected into a whole through screws, as shown in fig. 2. Preferably, the tibia component 1 and the femur component 4 can adopt the existing tibia extension rod and femur extension rod, the curved surface 5 is provided with a stand column 6, and the femur extension rod is installed on the stand column 6.
Preferably, in one embodiment, the femoral component 4 is angled between 10 ° and 25 °. Further, the inclination angle of the femoral component 4 is 15 °.
The working principle of the knee joint prosthesis is as follows: taking a supine position after target object is general, cutting knee joint skin, exposing femur and tibia, cutting off proper femur and tibia bone mass by using a pendulum saw, installing a tibia extension rod, a femur extension rod, and installing a knee joint gasket and a hinge, so that the axial included angle between the tibia extension rod and the femur extension rod accords with a set inflection angle, and stitching the knee joint layer by layer. The angle of inclination corresponds to the angle between the long axis of femur and tibia. If the angle of the reverse bending does not exist, 44% of target objects after operation can be subjected to reverse bending, and the reverse bending is unequal by 5-30 degrees, so that the service life of the knee joint prosthesis is influenced.
In addition, the specific embodiments described in the present specification may differ in terms of parts, shapes of components, names, and the like. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (9)
1. A method of making a knee prosthesis, comprising:
determining the inflection angle of the knee prosthesis: the muscle strength of the lower limb of the target object is monitored through the measuring device, the force data of the lower limb of the target object is obtained, and when the force data is maximum, the included angle between the long axis of the femur and the long axis of the tibia of the target object is obtained, and the included angle is the inflection angle of the knee joint prosthesis;
obtaining bone data of a lower limb of a target object, manufacturing a knee joint prosthesis model according to the bone data, adjusting the angle of a stand column on a knee joint gasket in the knee joint prosthesis model according to the inflection angle, enabling the inclination angle of the stand column to be equal to the inflection angle, manufacturing a knee joint prosthesis according to the knee joint prosthesis model, and enabling a femoral component of the manufactured knee joint prosthesis to extend along the axial direction of the stand column.
2. The method of manufacturing a knee prosthesis of claim 1, wherein the measuring device is a pressure detecting device; when the lower limb of the target object naturally abuts against the pressure detection device, the pressure reading is maximum, and the force data of the target object is minimum; when the lower limb of the target object is bent from the knee joint to the knee to change the bending angle of the knee joint, the pressure reading gradually decreases along with the stress of the target object, and when the pressure reading reaches the minimum value, the stress data of the target object is maximum.
3. The method of manufacturing a knee prosthesis of claim 1, wherein the angle between the long axis of the femur and the long axis of the tibia is obtained by an imaging device or brace.
4. The method for manufacturing a knee joint prosthesis according to claim 1, wherein a CT tomogram of a knee joint of a target object is acquired, bone data is acquired through the CT tomogram, anterior-posterior diameter, left-right diameter and inflection angle of a femoral condyle of the target object are measured on the CT tomogram, a three-dimensional map of a knee joint prosthesis model matched with the CT tomogram is drawn according to the data, an angle of a column on a knee joint pad in the knee joint prosthesis is adjusted in the three-dimensional map, and a back inclination angle of the column is equal to the inflection angle, and the knee joint prosthesis is manufactured according to the three-dimensional map.
5. The method of manufacturing a knee joint prosthesis according to claim 3, wherein the imaging device is an X-ray projector, and the full-length lateral plate of the target object is photographed by the X-ray projector when the target object is at the optimal force point, and the long axis of the femur and the long axis of the tibia are selected in the X-ray film for calculation.
6. A method of manufacturing a knee prosthesis according to claim 3, wherein the angle displayed by the upper rim of the brace is the angle between the long axis of the femur and the long axis of the tibia.
7. A knee joint prosthesis manufactured based on the knee joint prosthesis manufacturing method according to any one of claims 1-6, characterized by comprising a tibia component, a knee joint hinge, a knee joint pad and a femur component, wherein the tibia component is fixedly connected with the knee joint hinge, the knee joint hinge is movably connected with the knee joint pad, the knee joint pad is provided with a curved surface which is matched with the physiological structure of a human body, and the curved surface is fixedly connected with an inclined femur component.
8. The knee prosthesis of claim 7, wherein the femoral component is angled between 10 ° and 25 °.
9. The knee prosthesis of claim 8, wherein the angle of inclination is 15 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311042748.3A CN116747055B (en) | 2023-08-18 | 2023-08-18 | Knee joint prosthesis and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311042748.3A CN116747055B (en) | 2023-08-18 | 2023-08-18 | Knee joint prosthesis and manufacturing method thereof |
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| CN116747055A CN116747055A (en) | 2023-09-15 |
| CN116747055B true CN116747055B (en) | 2023-11-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5766257A (en) * | 1997-01-28 | 1998-06-16 | Implant Manufacturing And Testing Corporation | Artificial joint having natural load transfer |
| DE10031887A1 (en) * | 2000-06-30 | 2002-01-17 | Stryker Leibinger Gmbh & Co Kg | Knee joint prosthesis implantation system, selects appropriate prostheses based original knee kinematics determined using optical detection |
| CN113317843A (en) * | 2021-05-08 | 2021-08-31 | 广东医科大学附属医院 | Preparation method of individualized knee joint unicondylar replacement tibia accurate osteotomy guide plate |
| CN115175629A (en) * | 2020-01-22 | 2022-10-11 | 西蒙博依斯整形外科有限公司 | Anatomic knee prosthesis and method of designing same |
| CN115227460A (en) * | 2022-07-21 | 2022-10-25 | 西安交通大学 | Variable-curvature unicondylar knee joint prosthesis and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2014232933A1 (en) * | 2013-03-15 | 2015-10-29 | Arthromeda, Inc. | Systems and methods for providing alignment in total knee arthroplasty |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5766257A (en) * | 1997-01-28 | 1998-06-16 | Implant Manufacturing And Testing Corporation | Artificial joint having natural load transfer |
| DE10031887A1 (en) * | 2000-06-30 | 2002-01-17 | Stryker Leibinger Gmbh & Co Kg | Knee joint prosthesis implantation system, selects appropriate prostheses based original knee kinematics determined using optical detection |
| CN115175629A (en) * | 2020-01-22 | 2022-10-11 | 西蒙博依斯整形外科有限公司 | Anatomic knee prosthesis and method of designing same |
| CN113317843A (en) * | 2021-05-08 | 2021-08-31 | 广东医科大学附属医院 | Preparation method of individualized knee joint unicondylar replacement tibia accurate osteotomy guide plate |
| CN115227460A (en) * | 2022-07-21 | 2022-10-25 | 西安交通大学 | Variable-curvature unicondylar knee joint prosthesis and manufacturing method thereof |
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