CN107638234A - A kind of distal femoral component for customizing knee-joint prosthesis - Google Patents
A kind of distal femoral component for customizing knee-joint prosthesis Download PDFInfo
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- CN107638234A CN107638234A CN201711049677.4A CN201711049677A CN107638234A CN 107638234 A CN107638234 A CN 107638234A CN 201711049677 A CN201711049677 A CN 201711049677A CN 107638234 A CN107638234 A CN 107638234A
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Abstract
The present invention relates to medical instruments field, specifically, the present invention provides a kind of distal femoral component for customizing knee-joint prosthesis, especially, distal femoral component provided by the invention is dashed forward including entocondyle and external condyle is dashed forward, the entocondyle is prominent and the external condyle is prominent asymmetric, the prominent supporting surface of entocondyle has three different circular arcs, each circular arc has different radiuses, the prominent supporting surface of external condyle has three different circular arcs, each circular arc has different radiuses, coaster ditch is disposed between entocondyle is prominent and external condyle is prominent, femoral prosthesis provided by the invention is easy to use, customization of individual character, suitable for precisely medical treatment, production and clinical practice demand can be met simultaneously.
Description
Technical field
The present invention relates to medical instruments field, specially a kind of distal femoral component for customizing knee-joint prosthesis and manufacturer
Method.
Background technology
Knee joint is that human body is maximum, dissection is complicated, requires high joint to motor function.TKA is
A kind of prosthetic replacement's surgical operation, refer to cut off human organism can not self-healing articular surface, manually joint component
The joint of damage is substituted, orthotic limbs muscle power line, eliminates gonalgia, stability of joint is maintained, recovers the one of knee joint function
Kind treatment method.Total knee replacement than hip replacement application a little later, but also has more than 20 years history, especially
Recent years, knee replacements have developed rapidly, and solve some in the past very intractable technical barriers.Knee joint bone joint
Scorching and rheumatoid arthritis is the most common arthritis of knee joint, in arthritis late period, severe joint deformity and activity occurs
Obstacle, now just need to carry out holographic property art treatment.Holographic property art can not only substantially mitigate disease
Shape, moreover it is possible to which correction deformity and improvement function of joint, in European and American developed countries, prosthetic replacement's operation has been most common operation
One of.The development of China's knee replacements in recent years is also very fast.
Knee replacements generally have four parts：Distal femoral component, tibia support, tibial insert and patellar component.Femur group
Part is placed in the distal femoral of patient after femur is suitably cut off.Distal femoral component is typically metal, has high polishing ectocondyle tip out
Nodal section, it typically is J- shapes.
Although TKA is very successful surgery for the serious diseases of knee joint of such as osteoarthritis and rheumatic arthritis
Therapeutic choice, but much researchs have been described above current TKA implants and motion of knee joint are not returned into normal/healthy shape
State, the geometry of prosthese and the selection of material are to influence two big factors of offside cartilage wear degree, and the former is even more important,
And then limit postoperative patient's function.Therefore, still there is the knee joint for improving the kneed disease for the treatment of influence and damage
The demand of prosthese and method.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of distal femoral component for customizing knee-joint prosthesis and manufacturer
Method.
To achieve the above object, the present invention provides a kind of distal femoral component for customizing knee-joint prosthesis, the distal femoral component
Dashed forward including entocondyle and external condyle is dashed forward, the entocondyle is prominent and the external condyle is prominent asymmetric, the prominent supporting surface tool of entocondyle
There are three circular arcs, each circular arc has different radiuses, and the prominent supporting surface of external condyle has three different circular arcs, Mei Geyuan
Arc has different radiuses, and coaster ditch is disposed between entocondyle is prominent and external condyle is prominent.
Further, the prominent supporting surface of the entocondyle has three different circular arcs, and three circular arcs are femur
Entocondyle is dashed forward circular arc 101, and condylus medialis femoris is dashed forward circular arc 102, and bone entocondyle is dashed forward circular arc 103, the prominent supporting surface of the external condyle
With three different circular arcs, three circular arcs are that condylus lateralis femoris is dashed forward circular arc 301, and condylus lateralis femoris is dashed forward circular arc 302, femur
External condyle is dashed forward circular arc 303, and the distal femoral component also includes femoral bone pulley ditch circular arc 201.
Further, the prominent supporting surface of the entocondyle has three different circular arcs, and three circular arcs are stock
Bone entocondyle is dashed forward circular arc 101, parameter area 12-30mm, and condylus medialis femoris is dashed forward circular arc 102, parameter area 25-60mm, in femur
Side condyle is dashed forward circular arc 103, parameter area 55-85mm, and the prominent supporting surface of the external condyle has three different circular arcs, and described three
Individual circular arc is that condylus lateralis femoris is dashed forward circular arc 301, and parameter area 16-32mm, condylus lateralis femoris is dashed forward circular arc 302, parameter area 28-
65mm, condylus lateralis femoris are dashed forward circular arc 303, parameter area 55-90mm, and the distal femoral component also includes femoral bone pulley ditch circular arc 201,
Radius parameter scope 50-120mm, depth parameter scope 1-4mm.
Preferably, the condylus medialis femoris parameter of circular arc 101 of dashing forward be 18mm, the prominent parameter of circular arc 102 of the condylus medialis femoris
For 50mm, the condylus medialis femoris parameter of circular arc 103 of dashing forward be 70mm, and the prominent parameter of circular arc 301 of the condylus lateralis femoris is 20mm, stock
The bone external condyle parameter of circular arc 302 of dashing forward be 55mm, and the prominent parameter of circular arc 303 of condylus lateralis femoris is 75mm, the femoral bone pulley ditch circular arc
201 parameter radiuses are 80mm, depth 2.4mm.
To achieve the above object, the manufacture material of the distal femoral component selects biomedical cobalt-chromium alloy powder or titanium alloy
The medical grades such as powder, physiology acceptable material.
The strong side knee joint femoral condyle data of patient are extracted by CT first to carry out by three-dimensional reconstruction and reverse shaping software
Medical image three-dimensional image reconstruction, visual shaft-like, coronal and sagittal plane are obtained by defining top to bottom, left and right, front and rear direction
View, reverse obtain the 3 D anatomical model of Ipsilateral condyle of femur, using Interactive Visualization medical image processing module, it is determined that stock
Bone facies artieularis malleolaris, measure and record each profile parameter value of distal femur.
The femoral prosthesis personality analysis module includes the feature knot that analysis determines personalized knee joint femoral prosthesis
Structure parameter, the analysis determine the feature structure parameter of personalized knee joint femoral prosthesis, and it is used to determine knee joint femoral vacation
The shapes and sizes of body, medicine CT/MRI data image can be used to obtain human body knee joint personalization main characteristic parameters, according to
Each profile parameter value of distal femur measured, analysis determine the major parameter of distal femur size and shape, thereby determine that femur
The personalized principal character structural parameters of prosthese.
The knee-joint prosthesis includes the distal femoral component dashed forward with asymmetric inner side and outer side condyle, the prominent supporting of medial femoral condyle
Surface can have three different circular arcs, and each circular arc has different radiuses.Equally, the prominent supporting surface of lateral femur condyle
There can be three circular arcs, each circular arc has different radiuses.And the coaster arranged between inner side and external condyle are prominent
Ditch.
The materials such as biomedical cobalt-chromium alloy powder or titanium alloy powder can be selected in the manufacture material of femur replacement prosthesis, also
Can be by the medical treatment of polyethylene (for example, High molecular weight polyethylene and/or High molecular weight polyethylene containing vitamin E) etc.
Level, physiology acceptable material are to be adapted to the various sizes of various typical patients processing, casting, forging or to be configured to integral type whole
Body unit or two-piece-dress unit, or it can be after being based on particular patient physical examination and X-ray detection X for particular patient
The data that are there is provided by surgeon specially design.
The beneficial effects of the invention are as follows：
1st, the present invention proposes obtains human body knee joint femoral prosthesis individualized feature parameter with simple data image, and
It is easy to use, production and clinical practice demand can be met simultaneously.
2nd, it more accurately replicates the kneed function of normal human subject, anatomical structure and physiological function, this generates
A variety of advantages.The prosthese can be provided particularly in stretching, extension, the deeply in the wrong and increased range of movement during normal gait, together
When, the prosthese can effectively alleviate the problem on deformation in Patella Cartilage face when kneecap moves with respect to femur.
Brief description of the drawings
Fig. 1 is design method schematic flow sheet of the present invention；
Fig. 2 is the prominent distal end defined variable schematic diagram of condylus medialis femoris of the present invention；
Fig. 3 is the prominent distal end defined variable schematic diagram of condylus lateralis femoris of the present invention；
Fig. 4 is coaster ditch defined variable schematic diagram between condyle of femur of the present invention is dashed forward；
Fig. 5 is distal femoral component three-dimensional model diagram of the present invention.
Wherein：101- condylus medialis femorises are dashed forward circular arc 1, and 102- condylus medialis femorises are dashed forward circular arc 2, and 103- bones entocondyle is dashed forward circular arc 3,
301- condylus lateralis femorises are dashed forward circular arc 1, and 302- condylus lateralis femorises are dashed forward circular arc 2, and 303- condylus lateralis femorises are dashed forward circular arc 3, and 201- femurs are slided
Rut circular arc.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with accompanying drawing
It is described in detail on step ground.
Embodiment 1, the three-dimensional digitalization model for establishing based on the kneed medical image data of patient femur：
As shown in figure 1, the CT/MRI tomoscan images of the DICOM format based on patient's knee joint femoral, with medical science
Image software Mimics, the characteristics of showing different gray scales in the picture from bone according to soft tissue, carry out image segmentation, repair
After processing, three-dimensionalreconstruction is carried out to obtain femur three-dimensional digitalization model.
Embodiment 2, the modeling of artificial knee-joint thighbone component parameterization
The mechanical axis of femur is established, the surgery epicondyle line of femur is then found on the vertical plane of mechanical axis, with femur machine
Tool axle is Z axis, surgery epicondyle line is X-axis, and three-dimensional system of coordinate is established according to right-handed Cartesian coordinate system rule；Utilize range measurement
Instrument determines femur medial and lateral condyle tip out nodal section, and each profile parameter value of distal femur is fitted on corresponding joint face, wherein,
As shown in Fig. 2 condylus medialis femoris is dashed forward, matched curve includes the prominent circular arc 2 of the prominent condylus medialis femoris of circular arc 1,102 of 101- condylus medialis femorises,
103 bone entocondyles are dashed forward circular arc 3；As shown in figure 3, external condyle is dashed forward, matched curve includes the prominent circular arc 1 of 301- condylus lateralis femorises, 302- stocks
Bone external condyle is dashed forward circular arc 2, and 303- condylus lateralis femorises are dashed forward circular arc 3；As shown in figure 4, femoral bone pulley ditch matched curve femoral bone pulley ditch
201。
The prominent supporting surface of the entocondyle has three different circular arcs, and three circular arcs are the prominent circle of condylus medialis femoris
Arc 101, parameter area 12-30mm, condylus medialis femoris are dashed forward circular arc 102, parameter area 25-60mm, and condylus medialis femoris is dashed forward circular arc
103, parameter area 55-85mm, the prominent supporting surface of the external condyle have three different circular arcs, and three circular arcs are stock
Bone external condyle is dashed forward circular arc 301, parameter area 16-32mm, and condylus lateralis femoris is dashed forward circular arc 302, parameter area 28-65mm, outside femur
Side condyle is dashed forward circular arc 303, parameter area 55-90mm, and the distal femoral component also includes femoral bone pulley ditch circular arc 201, radius parameter model
Enclose 50-120mm, depth parameter scope 1-4mm.
Preferably, the condylus medialis femoris parameter of circular arc 101 of dashing forward be 18mm, the prominent parameter of circular arc 102 of the condylus medialis femoris
For 50mm, the condylus medialis femoris parameter of circular arc 103 of dashing forward be 70mm, and the prominent parameter of circular arc 301 of the condylus lateralis femoris is 20mm, stock
The bone external condyle parameter of circular arc 302 of dashing forward be 55mm, and the prominent parameter of circular arc 303 of condylus lateralis femoris is 75mm, the femoral bone pulley ditch circular arc
201 parameter radiuses are 80mm, depth 2.4mm.
Embodiment 3, reverse engineer obtain the CAD model of personalized femoral prosthesis：
On the basis of above-mentioned parameter, the operation such as sketch drafting, stretching, cutting, chamfering is carried out, finally adds fixed knot
Structure, including addition stationary cylinder and rear end connection cylinder, finally give the parametrization knee for meeting anatomical structure of personalization
Joint femoral prosthesis.
Embodiment 4, virtually replace and carry out matching checking
The osteotomy surface determined according to operation plan, carry out simulating distal femur osteotomy in three-dimensional software, transported by boolean
The operation such as calculate and obtain distal femur osteotomy model, with system tool by the distal femur model after osteotomy in software system module
Matched with the three-dimensional system of coordinate of femoral prosthesis unanimously, complete joint replacement assembly manipulation, matching is carried out to the model after displacement
Checking.
Above disclosure is only preferred embodiment of present invention, can not limit the right model of the present invention with this certainly
Enclose, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (5)
1. a kind of distal femoral component for customizing knee-joint prosthesis, it is characterised in that it is prominent and outer that the distal femoral component includes entocondyle
Side condyle is dashed forward, and the entocondyle is prominent and the prominent asymmetry of the external condyle, the prominent supporting surface of entocondyle have three circular arcs, Mei Geyuan
Arc has different radiuses, and the prominent supporting surface of external condyle has three circular arcs, and each circular arc has different radiuses, in inner side
Coaster ditch is disposed between condyle is dashed forward and external condyle is dashed forward.
2. distal femoral component according to claim 1, it is characterised in that the prominent supporting surface of the entocondyle has three not
With circular arc, three circular arcs are that condylus medialis femoris is dashed forward circular arc (101), and condylus medialis femoris is dashed forward circular arc (102), and bone entocondyle is dashed forward
Circular arc (103), the prominent supporting surface of the external condyle have three different circular arcs, and three circular arcs are dashed forward for condylus lateralis femoris
Circular arc (301), condylus lateralis femoris are dashed forward circular arc (302), and condylus lateralis femoris is dashed forward circular arc (303), and the distal femoral component also includes femur
Coaster ditch circular arc (201).
3. any distal femoral component according to claim 1 or claim 2, it is characterised in that the prominent supporting surface of the entocondyle has
Three different circular arcs, three circular arcs be condylus medialis femoris dash forward circular arc (101), parameter area 12-30mm, condylus medialis femoris
Prominent circular arc (102), parameter area 25-60mm, condylus medialis femoris are dashed forward circular arc (103), parameter area 55-85mm, the external condyle
Prominent supporting surface has three different circular arcs, and three circular arcs are that condylus lateralis femoris is dashed forward circular arc (301), parameter area
16-32mm, condylus lateralis femoris are dashed forward circular arc (302), parameter area 28-65mm, and condylus lateralis femoris is dashed forward circular arc (303), parameter area
55-90mm, the distal femoral component also include femoral bone pulley ditch circular arc (201), radius parameter scope 50-120mm, depth parameter model
Enclose 1-4mm.
4. any distal femoral component according to claim 1-3, it is characterised in that the condylus medialis femoris dash forward circular arc (101) ginseng
Number is 18mm, and condylus medialis femoris circular arc (102) parameter of dashing forward is 50mm, and condylus medialis femoris circular arc (103) parameter of dashing forward is
70mm, condylus lateralis femoris circular arc (301) parameter of dashing forward is 20mm, and condylus lateralis femoris circular arc (302) parameter of dashing forward is 55mm, femur
External condyle circular arc (303) parameter of dashing forward is 75mm, and femoral bone pulley ditch circular arc (201) the parameter radius is 80mm, depth 2.4mm.
5. any distal femoral component according to claim 1-4, it is characterised in that the manufacture material of the distal femoral component is from life
The medical grade such as thing medical science cobalt-chromium alloy powder or titanium alloy powder, physiology acceptable material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049677.4A CN107638234A (en) | 2017-10-31 | 2017-10-31 | A kind of distal femoral component for customizing knee-joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049677.4A CN107638234A (en) | 2017-10-31 | 2017-10-31 | A kind of distal femoral component for customizing knee-joint prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107638234A true CN107638234A (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711049677.4A Withdrawn CN107638234A (en) | 2017-10-31 | 2017-10-31 | A kind of distal femoral component for customizing knee-joint prosthesis |
Country Status (1)
| Country | Link |
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| CN (1) | CN107638234A (en) |
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2017
- 2017-10-31 CN CN201711049677.4A patent/CN107638234A/en not_active Withdrawn
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Application publication date: 20180130 |