CN106913399A - A kind of buffer-type hip joint - Google Patents
A kind of buffer-type hip joint Download PDFInfo
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- CN106913399A CN106913399A CN201510991038.4A CN201510991038A CN106913399A CN 106913399 A CN106913399 A CN 106913399A CN 201510991038 A CN201510991038 A CN 201510991038A CN 106913399 A CN106913399 A CN 106913399A
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- endoporus
- hole
- vestibule
- buffer
- hip joint
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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
-
- 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
- A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
-
- 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
- A61F2/3607—Femoral heads ; Femoral endoprostheses including proximal or total replacement of the 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
-
- 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
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/3611—Heads or epiphyseal parts of femur
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The present invention relates to a kind of buffer-type hip joint.It includes femoral stem（1）And neck of femur（2）, it is characterised in that：Femoral stem（1）It is split as near-end（3）And distal end（4）Two parts；Near-end（3）L-shaped through hole is provided with head（5）；Neck of femur（2）Bottom be plugged into L-shaped through hole（5）It is interior；Near-end（3）Bottom be provided with endoporus（6）, endoporus（6）Inside it is provided with cascaded surface（7）；Distal end（4）It is made of multilevel hole material, and distal end（4）Head on have additional connecting rod（8）；Connecting rod（8）End carry resilient barb（9）；Connecting rod（8）It is plugged into endoporus（6）In, and resilient barb（9）Hook is stuck in endoporus（6）In cascaded surface（7）Place；Endoporus（6）Compare connecting rod（8）It is long.Reasonable in design of the present invention, connective stability and biocompatibility are higher, and postoperation recovery effect is more preferably faster.
Description
Technical field
The present invention relates to human synovial displacement, more particularly to a kind of buffer-type hip joint.
Background technology
At present, existing artificial hip joint replacing prosthese is mostly unitary design, although it is with easily processed into type etc. excellent
Point, but if there is individual sites fracture such as neck fracture situation, its structure allomeric function will be caused to fail, this nothing
Doubt and cause huge waste；Simultaneously as there is the defect for lacking pooling feature, thus application again in unitary design itself
In its bear alternating force effect situation is poor, service life is shorter.Additionally, the replacement prosthesis of existing design is also present and people
Connective stability is not high between body tissue, easily loosens, rotates and comes off；Biocompatibility is poor, is subject to repel anti-after implantation
Should, the general character problem such as postoperation recovery effect on driving birds is not good.These problems are difficult to whole realizations by optimizing structure design merely.
Porous material has the characteristics such as relative density is low, specific strength is high, specific surface area is high, lightweight, good penetrability, is changing
The numerous areas such as work, medicine have a wide range of applications.In the porous material, multilevel hole material is due to its unique performance --- and it is same
When there is the advantage in holes at different levels, and there is the advantage not available for the material in single hole simultaneously, thus obtained increasing
Concern.For example, the macropore (aperture ＞ 50nm) with three-dimensional order-mesoporous (2nm ＜ apertures ＜ 50nm)-micropore (hole
Footpath ＜ 2nm) structure molecular sieve, combine multi-stage artery structure and molecular sieve both advantages nanocrystalline, impart molecule
The more open three-dimensional open-framework of sieve, while nano molecular sieve crystal substantially reduces mass transfer path, is effectively improved
Materialization activity of gained molecular sieve etc..
However, the loose structure for being used in prosthetic replacement's prosthese at present is mostly single Porous materials, and on from multistage
The report of Porous materials is even more extremely limited.This may in itself there is also along with hole mainly due to existing porous material
The raising of rate, structural mechanics intensity can be remarkably decreased, therefore porosity is generally relatively low, and connectivity is relatively low, be unfavorable for human body group
The efficient exchange of interior material is knitted, biocompatibility is not good, conducted oneself with dignity heavier, postoperative human feeling is not good；Additionally, to be applied to
Biomimetic artificial bone needs material uniform in itself, i.e., pore size, hole are evenly distributed, to cause performance uniformity but real
On border, there are many multilevel hole materials not reach the requirement, its lack of uniformity；In spite of material call oneself reached it is higher
Uniformity, but its uniformity is still the uniformity under large volume yardstick, if carrying out measurement comparing with small size yardstick, such as is existed
Material is taken up an official post and takes the said three-dimensional body that polylith volume is not more than a cubic centimetre, and its quality is surveyed respectively, and its degree of irregularity difference is still
Very big, the various performances for thus resulting in multilevel hole material are uneven, and such as pore size, space skewness result in mechanics
The uneven distributions such as intensity, elastic modelling quantity, cause the defects such as hidden danger of quality, 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 buffer-type hip joint, its reasonable in design, connective stability and bio-compatible
Property it is higher, postoperation recovery effect more preferably faster.
The purpose of the present invention is achieved through the following technical solutions：
A kind of buffer-type hip joint, it includes femoral stem and neck of femur, it is characterised in that：The femoral stem is split as near-end
With distal end two parts；L-shaped through hole is provided with the head of the near-end；The bottom of the neck of femur is plugged into the L-shaped through hole
It is interior；The bottom of the near-end is provided with endoporus, and cascaded surface is provided with the endoporus；The distal end is made of multilevel hole material, and
Connecting rod is had additional on the head of distal end；The end of the connecting rod carries resilient barb；The connecting rod is plugged into described
Kong Zhong, and resilient barb hook be stuck at the cascaded surface in endoporus；Connecting rod described in the interior boring ratio is long.
For further increase femoral stem proximally and distally between connective stability avoid loosen, and increase the two between buffering make
Firmly, above-mentioned buffer-type hip joint also has additional elastic device；Draw-in groove is had additional inside above-mentioned connecting rod；The elastic device
Coordinate in the draw-in groove and the endoporus simultaneously.Its elastic device can be using common components such as springs.
Installation for ease of resilient barb and card is hooked, and elastic device carried out simultaneously spacing, the central cavity of above-mentioned endoporus is in
Column, and central cavity minimum diameter more than endoporus top and the bottom cavity maximum inner diameter.The setting causes ladder EDS maps
In the middle part of endoporus, and cascaded surface is in continuous annular, is easy to the installation of resilient barb and hooks card.
To meet different patient personalized demands, to reach best installation effect requirement, the bottom of above-mentioned neck of femur is in integrally
Positive bar shape, top is set to bias tilt column；The lower end of above-mentioned neck of femur is made up of two parts, and a portion is for
Hook, another part is that spaced slot is provided between column, and barb and column；The bottom of above-mentioned neck of femur is inserted into
State in L-shaped through hole, and barb is hooked and is stuck in the transverse holes on L-shaped through hole.According to the situation of different patients, by controlling stock
The length on bone neck top, and the angle of inclination between neck of femur top and the bottom, you can make neck of femur that there are the variable rule of many kinds
Lattice, have adapted to the demand of different patients.
For convenience of the installation positioning action of product in operation implementation process, location hole is had additional on the head of above-mentioned femur handle proximal end.
As further optimization, the above-mentioned multilevel hole material that above-mentioned femoral stem distal end is used, specifically by multistage porous material
Constitute, including material body, body is the vestibule being classified with material pore size, and around the cavity wall structure of formation vestibule
Into 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；Holes at different levels
Chamber is each mutually communicated and vestibule at different levels also insertion each other each other, and vestibule refers to each vestibule in multi-stage porous in uniform distribution
In uniform distribution under arbitrary unit level volume on material.
More specifically, above-mentioned multilevel hole material, its intrinsic every grade of porous material is a continuous structure body certainly.And its
Maximum external boundary per one-level porous material is suitable with the space boundary of whole material body.I.e. every grade porous material can be made
For the porous material of one-level independence is present in body, and with its physical and chemical performance alone.Such structure can be caused respectively
The physical and chemical performance difference of level porous material, has different physical and chemical performances, more in the whole space of relatively-stationary material
Many functional requirements are met well.
More specifically, above-mentioned multilevel hole material, the cavity wall of higher level's vestibule can be made up of next stage porous material, so that hole
Chamber is layered step by step, and reasonable Arrangement vestibule structure and pore size；The cavity wall of higher level's vestibule can also be by the multistage of its subordinate
Porous material is compound to be constituted, or is constituted by the porous materials at different levels of its subordinate are compound, to cause that material meets specific function
Demand.
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
Centimetre formed objects said three-dimensional body, their quality are substantially suitable.
More specifically, above-mentioned quality quite refers to be not more than 1 cube li in take up an official post multiple volumes for taking of multilevel hole material substantially
The said three-dimensional body of the formed objects of rice, claims its quality respectively, obtains the average value of their quality, and any three-dimensional weight is relative
It is not more than the 4% of said three-dimensional body mass average value in the absolute value of the bias of 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.
And be being connected between easy part, the femoral stem distal end being made of above-mentioned multilevel hole material, can through bond, welding or
The conventional technique such as sintering, realization is fixed to one another with above-mentioned connecting rod.
The present invention has following beneficial effect：
(1) the invention provides a kind of buffer-type hip joint, its femoral stem is proximally and distally fallen via connecting rod, elasticity
Cooperation between the parts such as the endoporus of hook and given shape hooks card effect, realizes mutual connection and spacing, and by controlling endoporus
With the length of connecting rod, relative can be moved up and down between the two is caused again, with certain cushioning effect；And offer increased bullet
The elastic devices such as spring, slow down the severe impact that the product is subject in use, play cushioning effect, prevent product in impact
During load it is excessive and occur unexpected, ensured the security of product.Additionally, leading between neck of femur and femoral stem in structure
Cross barb and hook card effect with the plug-in type of L-shaped through hole, and connection is combined together, it is therefore prevented that neck of femur departs from from femoral stem；
And when the situations such as fracture occurs in neck, can realize separating neck of femur and femoral stem again, it is to avoid because of component failure
Integrally-built failure is caused to waste.
(2) its femoral stem distal end is made up of multilevel hole material；The multilevel hole material is three-dimensional insertion (including every grade of hole three
Dimension insertion, holes at different levels three-dimensional insertion mutually), its connectivity is greatly improved, and fully meets material as bionical people
Various functional requirements of work bone, for example, having good structural mechanical property and porosity higher concurrently simultaneously, greatly mitigate
Dead load, enhances the efficient exchange of material between tissue, greatly accelerates the convalescence after Miles operation；Phase increasing before implantation
Big contact area between its structure and femur, increases adhesive force, it is therefore prevented that femoral stem is rotated, and the phase after the implantation,
Due to the approximate trabecular bone structure of distribution mode in the multistage space that its structure mesoporous chamber is constituted, thus it is the fast fast-growing of tissue
It is long to grow into space there is provided good so that tissue enters the positions such as spaces at different levels, so form multistage grow into it is firm
Structure, greatly improves the connective stability of structure, also greatly reduces the rejection of human body, and thus brings
Bad impression, its healing effect more preferably faster.
(3) also the vestibule of multilevel hole material is evenly distributed in the present invention and proposes the metric form of specific, concrete, 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
Degree is uniform, 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 overall structure diagram of buffer-type hip joint described in the embodiment of the present invention 1.
Fig. 2 is buffer-type hip joint described in Fig. 1 through the structural representation after fractionation.
Fig. 3 is the A-A sectional views of femur handle proximal end in buffer-type hip joint described in Fig. 1.
Fig. 4 is buffer-type hip joint described in the embodiment of the present invention 2 through the structural representation after fractionation.
Fig. 5 is the B-B sectional views of femur handle proximal end in buffer-type hip joint described in Fig. 4.
Fig. 6 is buffer-type hip joint described in the embodiment of the present invention 3 through the structural representation after fractionation.
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 buffer-type hip joint, it includes femoral stem 1, neck of femur 2 and spring 10；
Its femoral stem 1 is split as near-end 3 and the two parts of distal end 4；It is provided with L-shaped through hole 5 in the head of near-end 3, and near-end 3
Location hole 16 is had additional on head；The bottom of its neck of femur 2 is in integrally positive bar shape, and top is set to bias tilt column；The stock
The lower end of bone neck 2 is made up of two parts, and a portion is barb 12, and another part is column 13, and barb
Spaced slot 14 is provided between 12 and column 13；The bottom of the neck of femur 2 is inserted into L-shaped through hole 5, and barb 12
Hook is stuck in the transverse holes 15 on L-shaped through hole 5；The bottom of its near-end of femoral stem 1 is provided with endoporus 6, the middle part of the endoporus 6
Cavity is in cylinder, and central cavity maximum inner diameter of the internal diameter more than the top and the bottom cavity of endoporus 6, during it is in cylindrical shape
Portion's cavity end is the cascaded surface 7 for foring a continuous annular；Its distal end 4 is made of multilevel hole material, and distal end 4
Connecting rod 8 is had additional on head, the end of the connecting rod 8 carries resilient barb 9；Connecting rod 8 is plugged into endoporus 6,
And resilient barb 9 is hooked and is stuck at the cascaded surface 7 in endoporus 6；Its endoporus 6 is more long than connecting rod 8, is set up inside connecting rod 8
There is draw-in groove 11；Spring 10 coordinates in draw-in groove 11 and endoporus 6 simultaneously；The distal end 4 of its femoral stem 1 is used in this example
Multilevel hole material is POROUS TITANIUM, with three-level hole, wherein, have in the cavity wall of the first order vestibule be uniformly distributed, being mutually communicated
The second level vestibule be uniformly distributed, being mutually communicated, there is the third level for being uniformly distributed, being mutually communicated in the cavity wall of second level vestibule
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 is continuous
Structure, the maximum external boundary per one-level porous material is suitable with whole material body space boundary, and every grade of porous material has
Physical and chemical performance alone.Total effective drainage porosity is 75%, and first order hole average pore size is 450 μm, in the cavity wall in first order hole
On have 30 μm of average pore size insertion second level hole, have the insertion of average pore size 670nm in the cavity wall in second level hole
Third level hole.
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
By volume 3：1：1：11 are configured to slurry.
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) by methylcellulose that hybrid particles, particle diameter are 30 μm by volume 3：Equably poured into after 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 between femur 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.Additionally, according to the actual conditions of different patients, selection control neck of femur 2 top biasing tilt column
Angle of inclination A between length L, and the top and the bottom of neck of femur 2, that is, cause that neck of femur 2 is provided with various variable specifications,
The individual demand of different patients is adapted to.
Embodiment 2
As shown in Figure of description 4-5, a kind of buffer-type hip joint, it includes femoral stem 1, neck of femur 2 and spring 10；
Its femoral stem 1 is split as near-end 3 and the two parts of distal end 4；L-shaped through hole 5 is provided with the head of near-end 3；Its neck of femur 2
Bottom integrally be in positive bar shape, top be set to bias tilt column；The lower end of the neck of femur 2 is made up of two parts, its
A middle part is barb 12, and another part is that spaced slot 14 is provided between column 13, and barb 12 and column 13；
The bottom of the neck of femur 2 is inserted into L-shaped through hole 5, and barb 12 is hooked and is stuck in the transverse holes 15 on L-shaped through hole 5；
The bottom of its near-end of femoral stem 1 is provided with endoporus 6, and two symmetrical interruption shape cascaded surfaces 7 are provided with the endoporus 6；Its
Distal end 4 is made of multilevel hole material, and connecting rod 8 is had additional on the head of distal end 4, and the end of the connecting rod 8 carries
Two symmetrically arranged resilient barbs 9；Connecting rod 8 is plugged into endoporus 6, and in two resilient barbs 9 hook be stuck in respectively
At cascaded surface 7 in hole 6；Its endoporus 6 is more long than connecting rod 8, and draw-in groove 11 is had additional inside connecting rod 8；Spring 10 is same
Shi Peihe is in draw-in groove 11 and endoporus 6；The multilevel hole material that the distal end 4 of its femoral stem 1 is used in this example is porous tantalum,
With three-level hole, wherein, have in the cavity wall of the first order vestibule be uniformly distributed, being mutually communicated and to be uniformly distributed, be mutually communicated
Second level vestibule, there is the third level vestibule for being uniformly distributed, being mutually communicated in the cavity wall of second level vestibule；And vestibule at different levels is mutual
Between also insertion each other, described insertion is three-dimensional insertion；Every grade of porous material is a continuous structure body certainly, per the porous material of one-level
The maximum external boundary of material is suitable with whole material body space boundary, and every grade of porous material is with physical and chemical performance alone.Always have
Effect porosity is 80%, and first order hole average pore size is 510 μm, there is 25 μm of average pore size in the cavity wall in first order hole
The second level hole of insertion, the third level hole for having average pore size 780nm insertions in the cavity wall in second 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, according to part by weight 1：40 mix with distilled water, are made starch molten
Liquid, by ethyl cellulose that above-mentioned particle, particle diameter are 35 μm and starch solution according to part by weight 12：1：8 are made slurry,
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；In when occur neck fracture etc. situation
When, can be stretched into transverse holes 15 with instrument, barb 12 is promoted to the side of spaced slot 14, to cause barb 12 and horizontal stroke
Hook card and act on to losing between hole 15, that is, realize and neck of femur 2 is separated with femoral stem 1, it is to avoid because neck breaks
The component failure such as split and cause integrally-built failure to waste.
Embodiment 3
As shown in Figure of description 6, a kind of buffer-type hip joint, it includes femoral stem 1 and neck of femur 2；Its femoral stem
1 is split as near-end 3 and the two parts of distal end 4；L-shaped through hole 5 is provided with the head of near-end 3；The bottom entirety of its neck of femur 2
In positive bar shape, top is set to bias tilt column；The bottom of the neck of femur 2 is plugged into L-shaped through hole 5 via interference fit；
The bottom of its near-end of femoral stem 1 is provided with endoporus 6, and the cascaded surface 7 of a continuous annular is provided with the endoporus 6；Adopt its distal end 4
It is made of multilevel hole material, and connecting rod 8 is had additional on the head of distal end 4, the end of the connecting rod 8 carries resilient barb
9；Connecting rod 8 is plugged into endoporus 6, and resilient barb 9 is hooked and is stuck at the cascaded surface 7 in endoporus 6；Its endoporus 6 compares
Connecting rod 8 is grown；The multilevel hole material that the distal end 4 of its femoral stem 1 is used in this example is identical with embodiment.
In the structure, the near-end 3 of its femoral stem 1 and distal end 4 are via in connecting rod 8, resilient barb 9 and given shape
Cooperation between the grade part of hole 6 hooks card, realizes mutual connection and spacing, and by controlling the length of endoporus 6 and connecting rod 8,
Relative can be moved up and down between causing the two again, with certain cushioning effect.
Claims (8)
1. a kind of buffer-type hip joint, it includes femoral stem（1）And neck of femur（2）, it is characterised in that：The femoral stem（1）It is split as near-end（3）And distal end（4）Two parts；The near-end（3）Head in be provided with L-shaped through hole（5）；The neck of femur（2）Bottom be plugged into the L-shaped through hole（5）It is interior；The near-end（3）Bottom be provided with endoporus（6）, the endoporus（6）Inside it is provided with cascaded surface（7）；The distal end（4）It is made of multilevel hole material, and distal end（4）Head on have additional connecting rod（8）；The connecting rod（8）End carry resilient barb（9）；The connecting rod（8）It is plugged into the endoporus（6）In, and resilient barb（9）Hook is stuck in endoporus（6）In cascaded surface（7）Place；The endoporus（6）Than the connecting rod（8）It is long.
2. buffer-type hip joint as claimed in claim 1, it is characterised in that：It also has additional elastic device；The connecting rod（8）Inside has additional draw-in groove（11）；The elastic device coordinates in the draw-in groove simultaneously（11）With the endoporus（6）In.
3. buffer-type hip joint as claimed in claim 1 or 2, it is characterised in that：The endoporus（6）Central cavity be in the form of a column body, and the minimum diameter of central cavity is more than endoporus（6）The maximum inner diameter of top and the bottom cavity.
4. the buffer-type hip joint as described in claim 1-3 is any, it is characterised in that：The neck of femur（2）Bottom integrally be in positive bar shape, top be set to bias tilt column；The neck of femur（2）Lower end be made up of two parts, a portion is barb（12）, another part is column（13）, and barb（12）With column（13）Between be provided with spaced slot（14）；The neck of femur（2）Bottom be inserted into the L-shaped through hole（5）It is interior, and barb（12）Hook is stuck in L-shaped through hole（5）On transverse holes（15）It is interior.
5. the buffer-type hip joint as described in claim 1-4 is any, it is characterised in that：The femoral stem（1）Near-end（3）Head on have additional location hole（16）.
6. the buffer-type hip joint as described in claim 1-5 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.
7. buffer-type hip joint as claimed in claim 6, it is characterised in that：Described multilevel hole material, its intrinsic every grade of porous material is a continuous structure body certainly, and it is suitable with the space boundary of whole material body per the maximum external boundary of one-level porous material；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, or constituted by the porous materials at different levels of its subordinate are compound.
8. buffer-type hip joint as claimed in claim 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 centimetre 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；The quality quite refer to substantially multilevel hole material take up an official post multiple volumes for taking be not more than 1 cubic centimetre 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108524062A (en) * | 2018-02-24 | 2018-09-14 | 吴承锦 | A kind of femoral stem |
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| EP0145938A2 (en) * | 1983-11-30 | 1985-06-26 | Protek AG | Intramedullary prosthesis |
| US6126694A (en) * | 1999-03-05 | 2000-10-03 | Sulzer Orthopedics Inc. | Universal distal broach and stem trial |
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| US7828851B2 (en) * | 2002-09-30 | 2010-11-09 | Depuy Products, Inc. | Modular trial mechanism |
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| EP0145938A2 (en) * | 1983-11-30 | 1985-06-26 | Protek AG | Intramedullary prosthesis |
| US6126694A (en) * | 1999-03-05 | 2000-10-03 | Sulzer Orthopedics Inc. | Universal distal broach and stem trial |
| US7828851B2 (en) * | 2002-09-30 | 2010-11-09 | Depuy Products, Inc. | Modular trial mechanism |
| CN101677860A (en) * | 2006-12-12 | 2010-03-24 | 精密技术公司 | Constrained liner lock ring and polyethylene liner are fit to parts |
| US20100010513A1 (en) * | 2008-07-14 | 2010-01-14 | Korean Institute Of Machinery & Materials | Porous material having hierarchical porous structure and preparation method thereof |
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