CN106923939A - A kind of combined type acetabular component - Google Patents
A kind of combined type acetabular component Download PDFInfo
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- CN106923939A CN106923939A CN201511003715.3A CN201511003715A CN106923939A CN 106923939 A CN106923939 A CN 106923939A CN 201511003715 A CN201511003715 A CN 201511003715A CN 106923939 A CN106923939 A CN 106923939A
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- cup
- vestibule
- combined type
- acetabular component
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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
- A61F2/34—Acetabular cups
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/56—Porous materials, e.g. foams or sponges
-
- 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
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30594—Special structural features of bone or joint prostheses not otherwise provided for slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00035—Other metals or alloys
- A61F2310/00131—Tantalum or Ta-based alloys
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Chemical & Material Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- Prostheses (AREA)
- Dispersion Chemistry (AREA)
- Dermatology (AREA)
- Epidemiology (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Medicinal Chemistry (AREA)
Abstract
The present invention relates to a kind of combined type acetabular component.It includes acetabular cup and liner（1）, it is characterised in that：The acetabular cup is by cup bottom（3）, and it is connected and fixed on a glass bottom（3）The cup of upper end（4）Composition；The cup（4）It is made of multilevel hole material；The cup（4）Draw-in groove is provided with the rim of a cup inner surface on top（5）；The draw-in groove（5）Inside have additional spring collar（2）；The liner is placed with the acetabular cup（1）, and the liner（1）Rim of a cup prop up the spring collar（2）Lower surface；The cup bottom（3）On offer hole（8）.Structure of the present invention itself can play the effect such as stable connection, be easily installed, and have biocompatibility higher concurrently.
Description
Technical field
The present invention relates to a kind of medicine equipment, more particularly to a kind of combined type acetabular component.
Background technology
Artificial hip joint replacing is clinically to rebuild the maximally efficient medical means of disease damage hip joint function at present.Traditional acetabular bone is false
The mounting means that body all includes between the parts such as acetabular cup and liner, but its acetabular cup and liner is often to be directly placed into, and is not entered
Line position puts fixation, thus loosening occurs in use or shifts, and its connective stability is poor.Additionally, its selection is generally to cause
Close metal, lacks mass exchange between the tissue of prosthese surrounding after the implantation, and biocompatibility is poor, is subject to repel,
Healing effect is not good；And as outer implant, also there is the connective stability how strengthened with tissue, to avoid pine
Situations such as moving, rotate and come off.
Porous material has the characteristics such as relative density is low, specific strength is high, specific surface area is high, good penetrability, in chemical industry, medicine
Had a wide range of applications Deng numerous areas.Wherein, multilevel hole material is due to its unique performance --- while having the excellent of holes at different levels
Gesture, and there is the advantage not available for the material in single hole simultaneously, and receive much concern.For example, the macropore with three-dimensional order
The molecular sieve of (aperture ＞ 50nm)-mesoporous (2nm ＜ apertures ＜ 50nm)-micropore (aperture ＜ 2nm) structure, with reference to
Multi-stage artery structure and molecular sieve both advantages nanocrystalline, impart the more open three-dimensional open-framework of molecular sieve, while
Nano molecular sieve crystal substantially reduces mass transfer path, is effectively improved materialization activity of gained molecular sieve etc..However,
The multilevel hole material being applied in prosthetic replacement at present is extremely limited.This may be mainly due to existing porous material sheet
Body cannot have porosity and structural mechanics intensity higher concurrently, therefore, its porosity is generally relatively low, heavier, connectivity of conducting oneself with dignity
It is poor, it is unfavorable for the efficient exchange of material in tissue, biocompatibility is undesirable, postoperation recovery effect on driving birds is not good；Human body
Tissue can not cover with inside configuration, it is impossible to eliminate cell stress barrier；To increase the stable connection with tissue, it is necessary to
Connection member etc. is set up on prosthese.
Additionally, being applied to biomimetic artificial bone need material uniform in itself, such as pore size, hole are evenly distributed, to cause property
Energy uniformity, but in fact, there are many multilevel hole materials not reach the requirement；In spite of call oneself and reached high uniformity,
But its uniformity is still the uniformity under large volume yardstick, if carrying out measurement comparing with small size yardstick, such as is taken up an official post in material
The said three-dimensional body that polylith volume is not more than one cubic centimetre and formed objects is taken, its quality is surveyed respectively, its degree of irregularity difference is still
So very big, the various performances for thus resulting in multilevel hole material are uneven, and such as pore size, space skewness result in power
The uneven distributions such as intensity, elastic modelling quantity are learned, the defects such as hidden danger of quality is caused, so as to have a strong impact on its function.Such as
CN201210185031 discloses a kind of preparation method of the biomimetic artificial bone of multistage (micrometer/nanometer) pore structure, but adopts
The three-dimensional multistage pore structure obtained with the method, randomness, scrambling due to its pore structure still can not meet bionical
The functional requirement of artificial bone.
The content of the invention
It is an object of the invention to provide a kind of combined type acetabular component, its structure itself can play the effect such as stable connection,
It is easily installed, has biocompatibility higher concurrently.
The purpose of the present invention is achieved through the following technical solutions：
A kind of combined type acetabular component, it includes acetabular cup and liner, it is characterised in that：The acetabular cup by cup bottom, with
And it is connected and fixed on the cup composition of glass bottom upper end；The cup is made of multilevel hole material；The rim of a cup on the cup top
Draw-in groove is provided with inner surface；Spring collar is had additional in the draw-in groove；The liner is placed with the acetabular cup, and it is described
The rim of a cup of liner props up the lower surface of the spring collar；Hole is offered on the cup bottom.
To further facilitate installation, above-mentioned spring collar is set to two interruption annulars of journal stirrup.During installation, journal stirrup is pinched
Firmly, spring collar is cylindrical diminishes, and now spring collar can be put into draw-in groove；Journal stirrup, spring collar are decontroled after being put into again
Restore to the original state, you can be installed in place, it is simple to operate, Same Way is used during taking-up.
To further facilitate operation, a breach is provided with the rim of a cup on above-mentioned cup top；Above-mentioned draw-in groove is in interruption annular；It is above-mentioned
The breach that journal stirrup is stretched out at the rim of a cup of above-mentioned cup top.
To increase the mass exchange passage between the implantation prosthese and biological tissue of human body, the hole opened up on above-mentioned cup bottom is uniform point
The multiple of cloth.
Used as further optimization, the above-mentioned multilevel hole material that above-mentioned cup is used specifically is made up of multistage porous material,
Including material body, body is the vestibule being classified with material pore size, and is constituted around the cavity wall for forming vestibule, its
Vestibule is in uniform distribution, and subordinate's vestibule is set in the cavity wall for constituting higher level's vestibule in three dimensions；Vestibules at different levels are each
From being mutually communicated and vestibule at different levels also insertion each other each other, vestibule refers to each vestibule on multilevel hole material in uniform distribution
It is in uniform distribution under arbitrary unit level volume.
More specifically, above-mentioned multilevel hole material, its intrinsic every grade of porous material is a continuous structure body certainly.
Above-mentioned multilevel hole material, the cavity wall of higher level's vestibule can be made up of next stage porous material, so that vestibule is layered step by step,
And the structure and pore size of reasonable Arrangement vestibule；The cavity wall of higher level's vestibule can also be combined by the multistage porous material of its subordinate
Constitute, to cause that material meets specific functional requirement.
Above-mentioned multilevel hole material, it is suitable with the space boundary of whole material body per the maximum external boundary of one-level porous material.
The porous material that i.e. every grade porous material can serve as one-level independence is present in body, and with its physical and chemical performance alone.
Such structure can cause the physical and chemical performance of porous materials at different levels difference, have in the whole space of relatively-stationary material
There are different physical and chemical performances, preferably meet many functional requirements.
More specifically, above-mentioned unit level volume refers to cubic centimetre level or cubic millimeter level or more subsection level volume.
More specifically, above-mentioned vestibule refers to be not more than 1 cube in the take up an official post volume that takes of the multilevel hole material in uniform distribution
The said three-dimensional body of the formed objects of millimeter, their quality are substantially suitable.
Above-mentioned quality quite refers to be not more than 1 cubic millimeter of formed objects in take up an official post multiple volumes for taking of multilevel hole material substantially
Said three-dimensional body, its quality is claimed respectively, obtain the average value of their quality, and any three-dimensional weight is relative to mass average value
Absolute value of the bias be not more than the 4% of said three-dimensional body mass average value.
Above-mentioned multilevel hole material in the present invention, can be specifically made of conventional medical metal, alloy and the material such as nonmetallic.
Above-mentioned cup bottom in the present invention, can be made of the conventional medical material such as titanium alloy, and be being connected between easy part,
It can realize the fixation that is connected to each other with above-mentioned cup through common process such as bonding, welding or sinterings.
The invention has the advantages that：
(1) the invention provides a kind of combined type acetabular component, it in the draw-in groove on rim of a cup inner surface by setting spring
Collar, is used to prop up liner, realizes and liner is secured firmly in acetabular cup, it is therefore prevented that displacement loosens.And further
Set by journal stirrup, breach etc., simplify installation and take out operation.Additionally, the hole opened up on its glass of bottom, is after the implantation
The passage that material is efficiently exchanged between the tissue as acetabular cup and surrounding, further enhancing post-operative recovery effect, and people
Body tissue also to being grown into the hole, and then can improve the connective stability and biocompatibility of structure.
(2) cup of its acetabular cup is made of multilevel hole material；The multilevel hole material is (including every grade of three-dimensional insertion
Hole three-dimensional insertion, holes at different levels three-dimensional insertion mutually), its connectivity is greatly improved, and fully meets material as imitative
Various functional requirements of raw artificial bone, for example, having good structural mechanical property and porosity higher concurrently, greatly mitigate
Dead load, enhances the efficient exchange of material in implantation Periprosthetic tissue, greatly accelerates the convalescence after Miles operation.
Contact area between its rough surface, with tissue is big, and phase adhesive force and frictional force are big before implantation；And phase after the implantation,
Its vestibule is constituted, the multistage space of approximating anatomy's Tissue distribution structure, for the fast-growth of tissue provide it is good
Grow into space so that tissue is orderly, selectively enter spaces at different levels, and then form multistage and grow into robust structure,
Both avoided and stable connection structure had been set on acetabular cup again, and greatly improved the connective stability of structure, also greatly
The rejection of human body is reduced, and the bad impression for thus bringing, its healing effect is more preferable.
(3) also to the selection of the cup of its acetabular cup in the present invention --- the vestibule of multilevel hole material be evenly distributed propose it is specific bright
True metric form, specify that it is the pore size distribution uniformity that multilevel hole material is measured under compared with the yardstick of subsection level volume,
Such multilevel hole material is high uniformity, so as to ensure that the uniformity consistency of the various performances of multilevel hole material, it is to avoid
The internal flaw of selection.
Brief description of the drawings
Fig. 1 is the structural representation of combined type acetabular component described in the embodiment of the present invention 1.
Fig. 2 is the A-A sectional views of combined type acetabular component described in Fig. 1.
Fig. 3 is the upward view of combined type acetabular component described in Fig. 2.
Fig. 4 is the structural representation of combined type acetabular component described in the embodiment of the present invention 2.
Specific embodiment
Premised on technical solution of the present invention, its detailed implementation method is following present, but protection scope of the present invention is not only
It is limited to embodiment disclosed below.In the case of not departing from and changing above-mentioned technological thought of the invention, according to the common skill of this area
Art knowledge and/or customary means, it is clear that the replacement or change of diversified forms can also be made, and model of the invention all should be included in
Within enclosing.
Embodiment 1
As shown in Figure of description 1-3, a kind of combined type acetabular component, it includes acetabular cup, liner 1 and spring collar
2；The acetabular cup is by cup bottom 3, and is connected and fixed on the cup 4 of the upper end of glass bottom 3 and constitutes；Its cup 4 dome shape in a ring,
And be made of multilevel hole material；Table in a breach 6, and the rim of a cup on the top of cup 4 is provided with the rim of a cup on its top of cup 4
The draw-in groove 5 in interruption annular is provided with face；Spring collar 2 is provided with draw-in groove 5；The spring collar 2 is set to two branch
The interruption annular of ear 7, and the breach 6 that journal stirrup 7 is stretched out at the top rim of a cup of cup 4；Liner 1 is placed with acetabular cup, and
The rim of a cup of liner 1 props up the lower surface of spring collar 2；Equally distributed multiple holes 8 are offered on its glass of bottom 3；In this example
The multilevel hole material that cup 4 is used is POROUS TITANIUM, and it has three-level hole, wherein, first for being uniformly distributed, being mutually communicated
There is the second level vestibule for being uniformly distributed, being mutually communicated in the cavity wall of level vestibule, be uniformly distributed in the cavity wall of second level vestibule,
The third level vestibule being mutually communicated；And vestibules at different levels also insertion each other each other, described insertion is three-dimensional insertion.Every grade more
Porous materials are from being a continuous structure body, and the maximum external boundary of every one-level porous material is suitable with whole material body space boundary,
Every grade of porous material is with physical and chemical performance alone.Total effective drainage porosity is 75%, and first order hole average pore size is 450 μm,
There is the second level hole of the insertion of 30 μm of average pore size in the cavity wall in first order hole, there is average hole in the cavity wall in second level hole
The third level hole of the insertion of footpath 670nm.
Taken up an official post in the POROUS TITANIUM with conventional machining method and take 9 said three-dimensional bodies of the same size of 10mm × 10mm × 10mm,
Its quality is tested with plum Teller-support benefit XP26 Microbalance balances, as a result as shown in table 1, wherein, relative to flat
The absolute value of the bias of average is expressed as a percentage, its value be the absolute value of the bias relative to average value divided by mass average value, by
Table 1 understands that its mass deviation is not more than 4%.
Table 1
| Piece number | Quality (mg) | Relative to the absolute value of the bias (%) of average value |
| 1 | 1156.184 | 1.4% |
| 2 | 1135.077 | 3.2% |
| 3 | 1151.493 | 1.8% |
| 4 | 1157.356 | 1.3% |
| 5 | 1145.630 | 2.3% |
| 6 | 1217.159 | 3.8% |
| 7 | 1197.225 | 2.1% |
| 8 | 1191.362 | 1.6% |
| 9 | 1201.915 | 2.5% |
| Mass average value | 1172.600 |
The preparation method of this kind of POROUS TITANIUM is：
(1) material prepares
It is raw material for 2 μm of titanium valve to use particle diameter, and particle diameter is the minimum one-level of the starch as multilevel hole material to be made of 770nm
The pore creating material of vestibule, with the stearic acid that particle diameter is 770nm as adhesive, according to titanium valve: starch: stearic acid: distilled water
It is configured to slurry at 3: 1: 1: 11 by volume.
Using a diameter of 30 μm of polyester form of rib, by the slurry, with foam impregnation method, uniformly filling wherein, forms base substrate
And dry, then crush and obtain the hybrid particles containing raw material, pore creating material and polyester form that particle is 30 μm.
(2) will equably be poured into after methylcellulose that hybrid particles, particle diameter are 30 μm by volume 3: 1 uniform mixing
During a diameter of 560 ± 20 μm of rib, aperture are for the polyester form of 400 ± 15 μm of three-dimensional insertion, then polyester form is put into
Closed mold is pressed into dense green.
(3) by dense green vacuum-sintering；Base substrate after sintering carries out conventional subsequent heat treatment according to titanium technique to be had
There is the POROUS TITANIUM in three-level hole.
Used as bone-regeneration material, first order hole size is particularly suitable for meeting the demand that the vital tissues such as blood vessel grow into this kind of POROUS TITANIUM；
Second level hole is particularly suitable for living away from home for various kinds of cell；Third level hole is particularly conducive to meet cell because of its substantial amounts of nano-pore
Stick, differentiation demand, and specific surface area is very big, can load many growth factors, and the adhesive force organized between bone is also stronger,
And, the connectivity in hole is good, and holes at different levels are each mutually communicated and hole at different levels also insertion each other each other, can fully meet blood
Liquid, the infiltration of tissue fluid, transmission, realize the discharge of protein degradation products and metabolism product, therefore it is a kind of true
Positive bone-regeneration material.
During using installing, first journal stirrup 7 is pinched, spring collar 2 is cylindrical to diminish, and now spring collar 2 can be put into card
In groove 5；Journal stirrup 7 is decontroled after being put into again, spring collar 2 restores to the original state, you can be installed in place, simple to operate, takes
Same Way is used when going out.
Embodiment 2
As shown in Figure of description 4, a kind of combined type acetabular component, it includes acetabular cup, liner 1 and spring collar 2；
The acetabular cup is by cup bottom, and is connected and fixed on a glass cup for bottom upper end 4 and constitutes；Its cup 4 dome shape in a ring, and adopt
It is made of multilevel hole material；An annular slot is provided with the rim of a cup inner surface on its top of cup 4；Spring collar is provided with draw-in groove
2；The spring collar 2 is set to two interruption annulars of journal stirrup 7；Be placed with liner 1 in acetabular cup, and liner 1 cup
Mouth props up the lower surface of spring collar 2；Equally distributed multiple holes are offered on its glass of bottom；Cup 4 is used in this example
Multilevel hole material is porous tantalum, and it has three-level hole, wherein, in the cavity wall of the first order vestibule be uniformly distributed, being mutually communicated
There is the second level vestibule for being uniformly distributed, being mutually communicated, there is the 3rd for being uniformly distributed, being mutually communicated in the cavity wall of second level vestibule
Level vestibule；And vestibules at different levels also insertion each other each other, described insertion is three-dimensional insertion；Every grade of porous material is certainly for one connects
Continuous structure, the maximum external boundary per one-level porous material is suitable with whole material body space boundary, every grade of porous material tool
There is physical and chemical performance alone.Total effective drainage porosity is 80%, and first order hole average pore size is 510 μm, in the chamber in first order hole
There is the second level hole of the insertion of 25 μm of average pore size on wall, there are average pore size 780nm insertions in the cavity wall in second level hole
Third level hole.
Taken up an official post in the multilevel hole material with conventional machining method and take 9 the three of the same size of 10mm × 10mm × 10mm
Dimension body, its quality is tested with plum Teller-support benefit XP26 Microbalance balances, as a result as shown in table 2, wherein, phase
Absolute value of the bias for average value is expressed as a percentage, and its value is average divided by quality relative to the absolute value of the bias of average value
Value, as shown in Table 2, its mass deviation is not more than 4%.
Table 2
| Piece number | Quality (mg) | Relative to the absolute value of the bias (%) of average value |
| 1 | 3282.624 | 1.6% |
| 2 | 3292.63 | 1.3% |
| 3 | 3242.592 | 2.8% |
| 4 | 3265.944 | 2.1% |
| 5 | 3285.960 | 1.5% |
| 6 | 3469.440 | 4% |
| 7 | 3409.392 | 2.2% |
| 8 | 3396.048 | 1.8% |
| 9 | 3379.368 | 1.3% |
| Mass average value | 3336 |
The preparation method of this kind of material is：
(1) material prepares
It is the polystyrene sphere of 900 ± 30nm to choose particle diameter, is assembled the colloid template to form three-dimensional order arrangement, system
Standby tantalum nanocrystal solution, tantalum nanocrystal solution is introduced into the three-dimensional colloid template that polystyrene sphere is made, by three-dimensional colloid
The mixture of template/tantalum nanocrystal solution is dried, and is then broken for the particle that particle diameter is 5 μm；
(2) starch that particle diameter is 900 ± 30nm is taken, is mixed with distilled water according to part by weight 1: 40, be made starch molten
Liquid, slurry is made by ethyl cellulose that above-mentioned particle, particle diameter are 35 μm and starch solution according to part by weight 12: 1: 8,
It is uniformly impregnated with to aperture as on 600 ± 20 μm of polyester form；
(3) polyester form after dipping is sintered in vacuum or protective atmosphere, conventional follow-up place is carried out according still further to tantalum technique
Reason, is obtained the porous tantalum with three-level hole.
Similar to embodiment 1, this kind of material is particularly suitable for doing bone-regeneration material.Through using above-mentioned multilevel hole material in this example
The cup being made, through common process such as bonding, welding or sinterings, realizes the fixation that is connected to each other with cup bottom.
Claims (8)
1. a kind of combined type acetabular component, it includes acetabular cup and liner（1）, it is characterised in that：The acetabular cup is by cup bottom（3）, and it is connected and fixed on a glass bottom（3）The cup of upper end（4）Composition；The cup（4）It is made of multilevel hole material；The cup（4）Draw-in groove is provided with the rim of a cup inner surface on top（5）；The draw-in groove（5）Inside have additional spring collar（2）；The liner is placed with the acetabular cup（1）, and the liner（1）Rim of a cup prop up the spring collar（2）Lower surface；The cup bottom（3）On offer hole（8）.
2. combined type acetabular component as claimed in claim 1, it is characterised in that：The spring collar（2）It is set to two journal stirrups（7）Interruption annular.
3. combined type acetabular component as claimed in claim 2, it is characterised in that：The cup（4）A breach is provided with the rim of a cup on top（6）；The draw-in groove（5）In interruption annular；The journal stirrup（7）Stretch out the cup（4）Breach at the rim of a cup of top（6）.
4. the combined type acetabular component as described in claim 1-3 is any, it is characterised in that：The cup bottom（3）On the hole that opens up（8）It is equally distributed multiple.
5. the combined type acetabular component as described in claim 1-4 is any, it is characterised in that：The multilevel hole material, is made up of multistage porous material, including material body, body is the vestibule being classified with material pore size, and constituted around the cavity wall for forming vestibule, its vestibule is in uniform distribution, and subordinate's vestibule is set in the cavity wall for constituting higher level's vestibule in three dimensions；Vestibules at different levels are each mutually communicated and vestibule at different levels also insertion each other each other, and vestibule refers to that each vestibule is in uniform distribution under arbitrary unit level volume on multilevel hole material in uniform distribution；Described multilevel hole material, it is suitable with the space boundary of whole material body per the maximum external boundary of one-level porous material.
6. combined type acetabular component as claimed in claim 5, it is characterised in that：Described multilevel hole material, its intrinsic every grade of porous material is a continuous structure body certainly；The cavity wall of higher level's vestibule in the multilevel hole material, or be made up of next stage porous material, or constituted by the multistage porous material of its subordinate is compound.
7. the combined type acetabular component as described in claim 5 or 6, it is characterised in that：The unit level volume refers to cubic centimetre level or cubic millimeter level；The vestibule refers to be not more than each said three-dimensional body of 1 cubic millimeter and formed objects in the take up an official post volume that takes of the multilevel hole material in uniform distribution, and their quality are substantially suitable.
8. combined type acetabular component as claimed in claim 7, it is characterised in that：The quality quite refer to substantially multilevel hole material take up an official post multiple volumes for taking be not more than 1 cubic millimeter formed objects said three-dimensional body, claim its quality respectively, the average value of their quality is obtained, and any three-dimensional weight is not more than the 4% of said three-dimensional body mass average value relative to the absolute value of the bias of mass average value.
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| Application Number | Priority Date | Filing Date | Title |
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| EP0790044A2 (en) * | 1996-02-13 | 1997-08-20 | Howmedica Inc. | Polyetheretherketone (peek) retaining ring for an acetabular cup assembly |
| CN2343991Y (en) * | 1998-10-30 | 1999-10-20 | 北京普鲁斯钢研外科植入物有限公司 | Artificial joint half-hip two active head device |
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Application publication date: 20170707 |