A kind of knee joint peripheral osteotomy taperlinerTechnical field
The present invention relates to medical field more particularly to a kind of knee joint peripheral osteotomy taperliners.
Background technology
The susceptibility of pain is improved with the universal and patient of domestic knee prosthesis, knee prosthesis quantity byYear increases, the age distribution that knee prosthesis is overhauled also increasingly rejuvenation.For the rejuvenation for delaying knee joint to overhaul, in recent yearsDomestic osteopathy name doctor proposes the stage treatment including different technologies for knee joint degenerative diseases, and " protecting knee " and " changing knee " is simultaneouslyIt lifts.
The inside and outside talipes varus that single condyle knee joint osseous arthritis generates can cause heavy burden stress distribution in joint abnormal, exampleIf sent out deformity in knee, stress concentration on the inside of knee joint is caused, the joint degeneration of inside is made to accelerate.When knee joint outgoing deformity, thenStress concentration on the outside of joint so that the joint in outside, which is changed in quality, to be accelerated.The inside and outside hair that single condyle knee joint osseous arthritis is generatedDeformity is using the biomechanical principle of Osteotomy for Treatment：After osteotomy by taperliner be implanted into wedge osteotomy area's individualism orCooperation bone plate reaches correct deformity, changes the heavy burden line of force of suffering limb, corrects for malalignment, can make the stress distribution on knee jointUnevenness correction, makes the stress in knee joint surface redistribute, mitigates the symptom of Osteoarthritis, slow down the process of arthropathy.
The correcting wedge material provided on the market at present is divided into allogeneic bone material, autogenous bone material and biological absorbableMaterial.Wherein, allogeneic bone material implantation wedge osteotomy area, Bony union rate is low, easily leads to bone information, and cannot be effectivePromotion Integrated implant, and easily lead to the propagation of disease；And autologous bone may cause to take related concurrent at bone as bone-grafting materialThe appearance of disease；And if the taperliner using alloy material provides permanently effective bone branch though can effectively prevent bone informationSupport, but for the total knee replacement that the later stage may carry out, need to carry out trepanning processing in the middle part of taperliner, and alloy materialObviously it can not be convenient for trepanning, osteotomy fixed area can not be provided for the total knee replacement in later stage.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of so existing provideA kind of knee joint peripheral wedge osteotomy gasket can provide the permanently effective bone support in wedge osteotomy area, promote wedge osteotomyThe Integrated implant in area, and osteotomy fixed area can be provided for the total knee replacement in later stage.
The present invention is to be achieved by the following technical programs：
A kind of knee joint peripheral osteotomy taperliner includes the taperliner ontology of biological nonabsorable material, the wedgeThe thickness of shape shim body is gradually decreased towards side, and osteotomy fixed area is equipped in the middle part of taperliner ontology.
The material of the taperliner ontology is titanium alloy, pure titanium or vitallium.
The taperliner ontology is circular ring type, and the outer profile of circular ring type is adapted with the outer profile of osteotomy position bone, is cutBone fixation area is the resigning circular hole carried in the middle part of taperliner ontology.
The taperliner ontology is the U-shaped that side has open recess, the foreign steamer of the outer profile and osteotomy position bone of U-shapedExterior feature is adapted, and taperliner ontology is gradually decreased towards U-shaped opening side thickness, and osteotomy fixed area is in taperliner ontologyThe opening recess in portion.
The taperliner ontology includes along two symmetrical monomer gaskets of U-shaped axis.
It is characterized in that, being provided with the mounting hole being pierced by obliquely on the downside of described thicker one end of taperliner ontology.
There is arcuate surface at the top of the outer rim of the taperliner ontology.
Ranging from 0-30 ° of the taperliner ontology upper and lower surface wedge shape angulation.
Taperliner body length described in the taperliner ontology is 20-30mm, width 20-50mm.
Facing material is spiral shape cellular structure metals bone trabecula at the larger side 1/6 of taperliner body thickness,Its stress is more than 60MPa.
The larger side 1/6-1/2 of taperliner body thickness everywhere Facing material be rounded porous structure metal boneGirder, stress 20-60MPa.
Facing material is diamond shape cellular structure metals bone trabecula at the smaller side 1/2 of taperliner body thickness,Stress is less than 20MPa.
The beneficial effects of the invention are as follows：
This gasket uses titanium alloy, pure titanium or vitallium material, can provide the permanently effective of wedge osteotomy areaBone supports, and reduces bone information risk, and can promote the Integrated implant in wedge osteotomy area, while can be carried for total knee replacementFor osteotomy fixed area.
Description of the drawings
Fig. 1 is that there are two the taperliner body construction stereograms of monomer gasket for tool.
Fig. 2 is that there are two the overlooking structure diagrams of the taperliner ontology of monomer gasket for tool.
Fig. 3 is that there are two the side structure schematic views of the taperliner ontology of monomer gasket for tool.
Fig. 4 is that there are two the main structure diagrams of the taperliner ontology of monomer gasket for tool.
Fig. 5 is rounded porous structural metal trabecular bone structure schematic diagram.
Fig. 6 is diamond shape cellular structure metals trabecular bone structure schematic diagram.
Fig. 7 is spiral shape cellular structure metals trabecular bone structure schematic diagram.
Fig. 8, Fig. 9 are U-shaped taperliner ontology main view and side block diagram with open recess.
Figure 10, Figure 11 are circular ring shape taperliner ontology main view and side block diagram.
Figure 12 is the structural schematic diagram loaded on osteotomy site of taperliner.
The position view of taperliner when Figure 13 is to carry out total knee replacement.
In figure：1. monomer gasket, 2. mounting holes, 3. arcuate surfaces, 4. rounded porous structural metal bone trabecula, 5. diamond shapesCellular structure metals bone trabecula, 6. spiral shape cellular structure metals bone trabecula.7. resigning circular hole, 8 open recess, 9. taperlinersOntology.
Specific implementation mode
In order to make those skilled in the art more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings and mostThe present invention is described in further detail for good embodiment.
As shown, the present invention includes the taperliner ontology 9 of biological nonabsorable material, the taperliner ontologyThickness is gradually decreased towards side, and osteotomy fixed area is equipped in the middle part of taperliner ontology.
Specifically, the material of the taperliner ontology is titanium alloy, pure titanium or vitallium.There is no by bone informationThe problem of, the permanently effective bone support in wedge osteotomy area can be provided, and the Integrated implant in wedge osteotomy area can be promoted.
Osteotomy fixed area is that total knee replacement is to provide osteotomy fixed area.Its specifically used state such as Figure 12, Figure 13Shown, osteotomy fixed area is by prosthese across osteotomy fixed area provides resigning.
A kind of embodiment of taperliner ontology is circular ring type, the outer profile phase of the outer profile and osteotomy position bone of circular ring typeIt adapts to, osteotomy fixed area is the resigning circular hole 7 carried in the middle part of taperliner ontology.
Another embodiment of taperliner ontology is the U-shaped that side has open recess, outer profile and the osteotomy portion of U-shapedThe outer profile of position bone is adapted, and taperliner ontology is gradually decreased towards U-shaped opening side thickness, and osteotomy fixed area is positioned at wedge shapeOpening recess 8 in the middle part of shim body.
Preferably, the taperliner ontology includes along two symmetrical monomer gaskets 1 of U-shaped axis.
The taperliner product provided on the market at present is mostly the taperliner structure of a made of one piece, is needed in the process in artIt first passes through auxiliary tool to pave wedge osteotomy area, again be put into taperliner after completing positioning, process is complex.
Two monomer gaskets can be used and be combined as filling pad, implantation is facilitated first to be encased inside one of which monomer gasket in artWedge osteotomy area paves, and at again other side monomer gasket taperliner is put into after positioning, coordinates without auxiliary tool, savesOperation process, is implanted into convenient for gasket.
Preferably, it is provided with the mounting hole 2 being pierced by obliquely on the downside of the thicker one end of the taperliner ontology.
Preferably, there is arcuate surface 3 at the top of the outer rim of the taperliner ontology.
Preferably, ranging from 0-30 ° of the taperliner ontology upper and lower surface wedge shape angulation.
Preferably, taperliner body length described in the taperliner ontology is 20-30mm, width 20-50mm.
Taperliner bone trabecula interface carries out gradient subregion according to stress and strain；
Knee-joint prosthesis model is established using computer technology, using the method for finite element analysis in femoral head rotation centerApply 3 to 5 times of human body weight load, confirm the stress and strain at Integrated implant interface, and carries out gradient subregion；
Preferably, Facing material is spiral shape cellular structure metals at the larger side 1/6 of the taperliner body thicknessBone trabecula, stress are more than 60MPa.
The larger side 1/6-1/2 of taperliner body thickness everywhere Facing material be rounded porous structure metal boneGirder, stress 20-60MPa.
Facing material is diamond shape cellular structure metals bone trabecula at the smaller side 1/2 of taperliner body thickness,Stress is less than 20MPa.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the artFor member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answeredIt is considered as protection scope of the present invention.