CN105853026A - Personalized femoral prosthesis and manufacturing method - Google Patents
Personalized femoral prosthesis and manufacturing method Download PDFInfo
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- CN105853026A CN105853026A CN201610274439.2A CN201610274439A CN105853026A CN 105853026 A CN105853026 A CN 105853026A CN 201610274439 A CN201610274439 A CN 201610274439A CN 105853026 A CN105853026 A CN 105853026A
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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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
-
- 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
-
- 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
- A61F2/28—Bones
-
- 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
- A61F2/38—Joints for elbows or knees
-
- 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
- A61F2/28—Bones
- A61F2002/2825—Femur
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
- A61F2002/30011—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in porosity
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30138—Convex polygonal shapes
- A61F2002/30154—Convex polygonal shapes square
-
- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
- A61F2002/30224—Three-dimensional shapes cylindrical
-
- 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
- A61F2002/30948—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 computerized tomography, i.e. CT scans
-
- 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
- A61F2002/30952—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 CAD-CAM techniques or NC-techniques
Abstract
The invention discloses a personalized femoral prosthesis and a manufacturing method. The personalized femoral prosthesis structurally comprises a patella articular surface prosthesis and a femoral articular surface prosthesis in the articular surface prosthesis, wherein two symmetric femoral condyle convex prostheses are arranged on the femoral articular surface prosthesis; truss porous structure prostheses are distributed on the surface of the middle of the femoral articular surface prosthesis in an array manner; femoral platform prostheses are arranged on two sides of the femoral articular surface prosthesis. A parametric modeling method is adopted, all that is required for modification of a model is to adjust input parameters instead of redesigning the model, so that the design efficiency can be greatly improved; due to adoption of the parametric modeling method, the porosity, the average pore size and the surface area-to-volume ratio can be adjusted by directly adjusting the input parameters, thus demands of different age groups are adapted; the optimum allocation of the personalized femoral prosthesis mechanics can be realized through motion simulation stress analysis.
Description
Technical field
The present invention relates to femoral prosthesis design and the manufacture printed based on 3D, particularly relate to a kind of personalized stock
Bone prosthese and manufacture method.
Background technology
Due to osteopathia, bone wound, the reason such as congenital malformation cause its cannot normal activity, serious shadow
Ring the physical and mental health of people, even threat to life, then need it to be repaired by performing the operation or changes.Mesh
Implant major part employed in front domestic operation is the product of external import, with mating of Chinese ethnic group
Degree and similarity are relatively low, are therefore badly in need of research and development and are suitable for the femoral prosthesis that compatriots' personalized medicine is implanted.
After conventional personalized implant is implanted, there is poor biocompatibility, the shortcoming easily loosened.
Personalized biological fixed pattern implant has good biocompatibility, good mechanical performance, implantation because of it
The advantage that rear prosthetic loosening rate is low, gradually starts application.But, existing biological fixation type implant is big
Many simple designs adding reinforcement etc in prosthetic surface, forming method uses traditional casting, has
Design efficiency is low, poor biocompatibility, the shortcoming of the most loosening and difficult molding.
Summary of the invention
It is an object of the invention to overcome the shortcoming and defect of above-mentioned prior art, it is provided that a kind of structural strength
Height and molding readily personalized femoral prosthesis and manufacture method.
The present invention is achieved through the following technical solutions:
A kind of personalized femoral prosthesis manufacture method, comprises the steps:
Step A00: obtained the sheet layer data at femur position by CT or MRT；
Step B00: the sheet layer data that will obtain, imports mimics software, it is carried out Threshold segmentation,
The cut zone that region increases being not connected with each other in preliminary threshold segmentation masking-out segments subgroup further,
Generating new masking-out, finally smooth it, denoising etc. operates, it is thus achieved that three-dimensional femoral model after reconstruction；
Step C00: after rebuilding, the point cloud model of three-dimensional femoral model imports Geomagic Studio, enters
Row simulation is deep, extracts the femur contour surface data at wanted position (patient part)；
Step D00: the femur contour surface data of extraction are imported general three-dimensional software and completes to rebuild, logical
Cross Grasshopper and extract deep corresponding surface profile, generate truss loose structure in osteotomy surface；
Step E00: step D00 truss loose structure is carried out motion simulation force analysis, according to limited
Unit's motion force analysis result, input regulation parameter adjusts in real time, optimizes design, obtains 3D solid mould
Type；
Step F00: the three-dimensional entity model that will obtain, carries out slicing delamination, path planning, imports 3D
Metallic print equipment, completes molding；
During 3D metallic print,
(1) size of n Yu N is judged；
(2) if n < N, step F00 is performed；
(3) if n >=N, step I00 is performed；
(4) print complete, obtain satisfactory personalized femoral prosthesis；
Wherein, n >=N.
A kind of personalized femoral prosthesis, this femoral prosthesis structure includes: facies articularis patellae prosthese 400 and pass
Femoral joint face prosthese 200 in nodal section prosthese 400；Femoral joint face prosthese 200 is provided with two symmetries
Condyle of femur convex prosthese 100；
On prosthese 200 middle part surface of femoral joint face, array distribution has truss loose structure prosthese 300；
It is provided with femur platform prosthese 500 in prosthese 200 both sides, femoral joint face.
Described truss loose structure prosthese 300 is multilamellar, and the hole in each layer is gradient pore, aperture by inner to
Gradually it is incremented by outward.The pore diameter range of described truss loose structure prosthese 300 is 50 μm-1000um；
Described truss loose structure prosthese 300 is supported by pillar；Strut diameter scope is 80 μ
m-1000um；Strut configurations is square or cylindrical.
The present invention, relative to prior art, has such advantages as and effect:
By using parametric modeling method, the change of model need not redesign, it is only necessary to regulation input
Parameter just can complete, and can be greatly improved design efficiency；Owing to using parametric modeling method, can be direct
By regulation input parameter adjustment hole porosity, average pore size, surface-to-volume ratio, to adapt to all ages and classes
Section demand；Owing to it is carried out motion simulation force analysis, personalized femoral prosthesis mechanics can be realized
Optimal sorting is joined.
The structure using laser 3D Method of printing to make personalized femur false is no longer limited by process conditions, right
There is hole complex-curved, complicated can realize directly manufacturing；
The number of plies of truss loose structure prosthese is the most limited, the hole in truss structure can be designed to gradient
Hole.By to the parametric modeling of implant and SLM straight forming, can be greatly improved design efficiency,
Reach directly to manufacture the purpose of personalized implant, improve service life.
Accompanying drawing explanation
Fig. 1 is femoral prosthesis structural representation one of the present invention.
Fig. 2 is Fig. 1 top perspective view.
Fig. 3 is Fig. 2 truss loose structure borrowed structure schematic diagram.
Fig. 4 is Fig. 1 schematic side view.
Fig. 5 is femoral prosthesis structural representation two of the present invention.
Fig. 6 is that this femoral prosthesis designs, 3D prints flow chart.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Figures 1 to 4.The invention discloses a kind of personalized femoral prosthesis, this femoral prosthesis structure
Including: the femoral joint face prosthese 200 in facies articularis patellae prosthese 400 and articular facet prosthetic 400；Femur
Articular facet prosthetic 200 is provided with two symmetrical condyle of femur convex prostheses 100；
On prosthese 200 middle part surface of femoral joint face, array distribution has truss loose structure prosthese 300；
It is provided with femur platform prosthese 500 in prosthese 200 both sides, femoral joint face.
The biocompatibility good in order to realize biological fixation type femoral prosthesis, prevents prosthetic loosening, described
Truss loose structure prosthese 300 is multilamellar, and the hole in each layer is gradient pore, and aperture is the most gradually passed
Increase.I.e. relatively big near the aperture, hole of osteotomy surface, less near the aperture, hole of femur platform 500, truss is many
The aperture of pore structure 300 is the most gradually incremented by, and so can avoid " stress shielding ", it is achieved power
Optimum allocation, improves the biocompatibility of femoral prosthesis, prevents femoral prosthesis from loosening, is greatly prolonged prosthese
Service life.
The pore diameter range of described truss loose structure prosthese 300 is 50 μm-1000um；
Described truss loose structure prosthese 300 is supported by pillar；Strut diameter scope is 80 μ
m-1000um；Strut configurations is square or cylindrical.
Certainly, the truss loose structure number of plies of described femoral prosthesis is unrestricted, can be according to actual needs
Depending on.The structure of described femoral prosthesis is unrestricted, can be arbitrarily devised according to being actually needed.Described stock
The shapes and sizes of the truss loose structure of bone prosthese can set according to actual needs.
Also known as " metal 3D prints selective laser fusing (Selective Laser Melting, SLM) technology
Technology " it is to increase the cutting edge technology that material manufactures, utilize the focusing laser beam of diameter 30～50 microns, metal
Or alloy powder constituency successively melts, it is piled into a metallurgical binding, the entity of dense structure, thus obtains
Almost arbitrary shape, there is the metal function part of complete metallurgical binding.
Femoral prosthesis of the present invention passes through metal 3D laser printing apparatus according to femoral prosthesis cross section profile number
According to, control laser beam and optionally melt each layer metal dust paved, progressively stacking forms.Can pass through
Following steps realize:
Step A00: obtained the sheet layer data at femur position by CT or MRT；
Step B00: the sheet layer data that will obtain, imports mimics software, it is carried out Threshold segmentation,
The cut zone that region increases being not connected with each other in preliminary threshold segmentation masking-out segments subgroup further,
Generating new masking-out, finally smooth it, denoising etc. operates, it is thus achieved that three-dimensional femoral model after reconstruction；
Step C00: after rebuilding, the point cloud model of three-dimensional femoral model imports Geomagic Studio, enters
Row simulation is deep, extracts the femur contour surface data at wanted position (patient part)；
Step D00: the femur contour surface data of extraction are imported general three-dimensional software and completes to rebuild, logical
Cross Grasshopper and extract deep corresponding surface profile, generate truss loose structure in osteotomy surface；
Step E00: step D00 truss loose structure is carried out motion simulation force analysis, according to limited
Unit's motion force analysis result, input regulation parameter adjusts in real time, optimizes design, obtains 3D solid mould
Type；
Step F00: the three-dimensional entity model that will obtain, carries out slicing delamination, path planning, imports 3D
Metallic print equipment, completes molding；
During 3D metallic print,
(1) size of n Yu N is judged；
(2) if n < N, step F00 is performed；
(3) if n >=N, step I00 is performed；
(4) print complete, obtain satisfactory personalized femoral prosthesis；
Wherein, n >=N；Wherein, N is the basic demand that biological fixation is implanted, such as mechanical property, size
Precision etc.；N is the basic parameter of part after molding.
In order to improve the quality of molding, powder (CoCrMo alloy powder) raw material that laser 3D prints
Need through filtering and drying and processing before adding powder cylinder: powder raw material was carried out through vibrosieve
Filter, to filter the impurity in powder raw material；Again powder raw material is carried out drying and processing, to reduce powder
The raw-material oxygen content in end.
Powder raw material enters print area from laser printing apparatus can be by for powder form or dusting powders
Realize.
In order to ensure the end product quality of femoral prosthesis, through laser 3D print prepare femoral prosthesis need through
Annealing, sandblasting, electrobrightening, mirror finish process, and can use after carrying out disinfection.
The femoral prosthesis structure that the present invention prepares by using laser printing method, no longer by process conditions
Limit, the femoral prosthesis with arbitrary structures can be prepared, to the femur with hole complex-curved, complicated
Prosthese all can realize directly manufacturing；Prepared by employing laser printing method, the truss structure number of plies of femoral prosthesis
The most limited, the hole in truss structure can be designed to gradient pore.
Can use square or cylindrical owing to the shape of laser printing truss framework pillar is the most restricted,
Motility is bigger.So can avoid " stress shielding ", it is achieved the optimum allocation of power, improve femoral prosthesis
Biocompatibility, prevents femoral prosthesis from loosening, is greatly prolonged the service life of prosthese.
As it has been described above, just can preferably realize the present invention.
Embodiments of the present invention are also not restricted to the described embodiments, and other are any without departing from the present invention's
The change made under spirit and principle, modify, substitute, combine, simplify, all should be putting of equivalence
Change mode, within being included in protection scope of the present invention.
Claims (8)
1. a personalized femoral prosthesis manufacture method, it is characterised in that comprise the steps:
Step A00: obtained the sheet layer data at femur position by CT or MRT；
Step B00: the sheet layer data that will obtain, imports mimics software, and it is carried out Threshold segmentation, and the cut zone that region increases being not connected with each other in preliminary threshold segmentation masking-out segments subgroup further, generates new masking-out, it is thus achieved that three-dimensional femoral model after reconstruction；
Step C00: after rebuilding, the point cloud model of three-dimensional femoral model imports Geomagic Studio, is simulated deep, extracts the femur contour surface data at wanted position；
Step D00: the femur contour surface data of extraction are imported general three-dimensional software and completes to rebuild, extract deep corresponding surface profile by Grasshopper, generate truss loose structure in osteotomy surface；
Step E00: step D00 truss loose structure is carried out motion simulation force analysis, according to finite element motion force analysis result, input regulation parameter adjusts in real time, obtains three-dimensional entity model；
Step F00: the three-dimensional entity model that will obtain, carries out slicing delamination, path planning, imports 3D metallic print equipment, complete molding.
The most personalized femoral prosthesis manufacture method, it is characterised in that: during 3D metallic print,
(1) size of n Yu N is judged；
(2) if n < N, step F00 is performed；
(3) if n >=N, step I00 is performed；
(4) print complete, obtain satisfactory personalized femoral prosthesis；
Wherein, n >=N.
3. the personalized femoral prosthesis that personalized femoral prosthesis manufacture method according to any one of claim 1 to 2 obtains, it is characterised in that this femoral prosthesis structure includes:
Femoral joint face prosthese (200) in facies articularis patellae prosthese (400) and articular facet prosthetic (400)；Femoral joint face prosthese (200) is provided with two symmetrical condyles of femur convex prosthese (100)；
On prosthese (200) middle part surface of femoral joint face, array distribution has truss loose structure prosthese (300)；It is provided with femur platform prosthese (500) in prosthese (200) both sides, femoral joint face.
The most personalized femoral prosthesis, it is characterised in that described truss loose structure prosthese (300) is multilamellar, and the hole in each layer is gradient pore, and aperture is the most gradually incremented by.
The most personalized femoral prosthesis, it is characterised in that the pore diameter range of described truss loose structure prosthese (300) is 50 μm-1000um.
The most personalized femoral prosthesis, it is characterised in that described truss loose structure prosthese (300) is supported by pillar.
The most personalized femoral prosthesis, it is characterised in that described strut diameter scope is 80 μm-1000um.
The most personalized femoral prosthesis, it is characterised in that described strut configurations is square or cylindrical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274439.2A CN105853026A (en) | 2016-04-28 | 2016-04-28 | Personalized femoral prosthesis and manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610274439.2A CN105853026A (en) | 2016-04-28 | 2016-04-28 | Personalized femoral prosthesis and manufacturing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106875489A (en) * | 2017-02-20 | 2017-06-20 | 影为医疗科技(上海)有限公司 | A kind of construction method of individuation femur short handle |
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