A kind of customization porous tantalum shin bone cushion blockTechnical field
The utility model relates to orthopaedics implant fields, more particularly relate to a kind of customization porous tantalum shin bone cushion block.
Background technique
With the acceleration of aging process and the increase of obesity rates, more and more people suffer from osteoarthritis, need to carry outJoint replacement surgery.The several years after joint replacement surgery often will appear prostheses migration, Prosthesis related infections, prosthetic loosening and sink to leadingPhenomena such as causing bone dissolution, brings great pain to patient, and it is clinically common for carrying out prosthese revision procedure using shin bone cushion blockA kind for the treatment of means, it is larger for the shin bone cushion block demand of tibial plateau bone defect among these.
Traditional shin bone cushion block is mainly prepared by stainless steel, titanium alloy etc materials, and these types of material all has fluid environmentIt is lower to be easy to be corroded, and the problem of osseointegration character difference, therefore it is not up to ideal therapeutic effect.Porous tantalum is to cure at presentEducational circles generally acknowledges the best hard tissue implanting material of biocompatibility, clinical application for many years, its is excellent for more than 250 document reportsDifferent biocompatibility, global more than 1,000,000 porous tantalum Using prosthesis human bodies.It has been implanted into the porous tantalum shin bone pad of human body at presentBlock mostly uses CVD method to manufacture, and the porous tantalum implantation prosthese of this method preparation is single pore structure, after leading to implantationPorous tantalum joint pad there are problems that the performance requirements such as size, quality, intensity and later period Bone Ingrowth can not be met simultaneously.
Utility model content
The utility model embodiment provides a kind of customization porous tantalum shin bone cushion block, to solve existing porous tantalum shin bone padThere are single pore structures for block, can not meet asking for the performance requirements such as size, quality, intensity and later period Bone Ingrowth after implantation simultaneouslyTopic.
The utility model embodiment provides a kind of customization porous tantalum shin bone cushion block, and the shin bone cushion block is according to the bone of patientBone situation is prepared using spherical tantalum powder as raw material through powder bed electron beam selective melting technology, institute by three-D CT scanning, three-dimensional modelingThe porosity for stating shin bone cushion block is 70%~90%, including first order pore structure, second level pore structure and third level pore structure；
The top of the second level pore structure and the third level pore structure connects with the bottom end of the first order pore structureTouching, and the third level pore structure is partly wrapped on the inside of the second level pore structure by the second level pore structure；Wherein, describedFirst order pore structure is in contact with prosthese, and the second level pore structure is in contact with soft tissue, the third level pore structure and boneTissue is in contact.
Preferably, the hole muscle diameter of the first order pore structure is between 1.5~2.5mm, aperture between 1~2mm itBetween.
Preferably, the second level pore structure includes spandrel girder and porous truss, and the porous truss is by the spandrel girderIn being wrapped in.
Preferably, the load-bearing cantilever thickness is dispersed with diameter between 2~3mm between 1~2mm on the spandrel girderRound hole, and the spacing of two adjacent round holes is between 1~2mm.
Preferably, the hole muscle diameter of the porous truss junction structure is between 0.6~1mm, the porous truss and instituteThe pore size of spandrel girder contact area is stated between 1.5~2.5mm, with the pore size of soft tissue contact area betweenBetween 0.6~1mm.
Preferably, the hole muscle diameter of the third level pore structure is between 0.3~0.6mm, and pore size is between 0.4Between~0.6mm.
The utility model embodiment provides a kind of porous tantalum shin bone cushion block, and the shin bone cushion block is according to the bone situation of patientBy three-D CT scanning, three-dimensional modeling, prepared using spherical tantalum powder as raw material through powder bed electron beam selective melting technology, the shin boneThe porosity of cushion block is 70%~90%, including first order pore structure, second level pore structure and third level pore structure；DescribedThe top of second level pore structure and the third level pore structure is in contact with the bottom end of the first order pore structure, and the second levelThe third level pore structure is partly wrapped on the inside of the second level pore structure by pore structure；Wherein, the first order pore structure withProsthese is in contact, and the second level pore structure is in contact with soft tissue, and the third level pore structure is in contact with bone tissue.This realityThe customization porous tantalum shin bone cushion block provided with new embodiment chooses fusing skill through powder bed electron beam using spherical tantalum powder as raw materialArt shapes under vacuum conditions, avoids the pollution of the impurity elements such as oxygen in forming process, carbon, concise in technology and cushion block precisionHeight can need the position perfection repaired to agree with patient.For cushion block according to the difference of contact surface, pore structure is also different, a sideFace can prevent bone cement from penetrating into prosthese, soft tissue growth is conducive to while on the one hand can increasing cushion block intensity, on the other handIt can also be conducive to bone growth and convenient for adjusting size in operation.Customization porous tantalum shin provided by the embodiment of the utility modelBone cushion block can meet the problem of performance requirements such as size, quality, intensity and later period Bone Ingrowth simultaneously, when substantially reducing operationBetween, alleviate the labor intensity of doctor and the pain of patient.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodimentOr attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is onlyIt is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative laborUnder, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of customization porous tantalum shin bone cushion block structure schematic diagram provided by the embodiment of the utility model；
Fig. 2 is a kind of customization porous tantalum shin bone cushion block first order pore structure provided by the embodiment of the utility model and secondGrade pore structure schematic diagram.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility modelClearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than wholeEmbodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative workEvery other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1 is a kind of customization porous tantalum shin bone cushion block structure schematic diagram provided by the embodiment of the utility model, such as Fig. 1 instituteShow, which mainly includes first order pore structure 1, second level pore structure 2 and third level pore structure 3, whereinThe top of second level pore structure 2 and third level pore structure 3 is in contact with a bottom end of first order pore structure 1, and second level holeThird level pore structure 3 half is wrapped in the inside of second level pore structure 2 by structure 2.
In practical applications, first order pore structure 1 is in contact with prosthese, and second level pore structure 2 is in contact with soft tissue, theThree-level pore structure 3 is in contact with bone tissue.It should be noted that porous tantalum tantalum shin bone cushion block provided by the embodiment of the utility modelIncluding three-level pore structure there is different pore structures since contact surface is different, the porosity of the porous tantalum shin bone cushion block can be withReach 70%~90%.
Fig. 2 is first order pore structure provided by the embodiment of the utility model and second level pore structure schematic diagram, such as Fig. 2 instituteShow, since the first order pore structure 1 of porous tantalum shin bone cushion block needs to contact with prosthese, bone cement penetrates into prosthese in order to prevent,Preferably, hole muscle diameter included by first order pore structure 1 is between 1.5~2.5mm, and the size in aperture is between 1~2mmBetween.
As shown in Fig. 2, the second level pore structure 2 of porous tantalum shin bone cushion block provided by the embodiment of the utility model includes to holdWeight beam 4 and porous truss 5, wherein spandrel girder 4 is located inside porous truss 5, i.e., spandrel girder 4 is wrapped in interior by porous truss 5.It is in being wrapped in third level pore structure 3 half due to second level pore structure 2, i.e., vertical between spandrel girder 4 and third level pore structure 3Distance is less than the vertical range between porous truss 5 and third level pore structure 3.
Further, as shown in Fig. 2, being uniform-distribution with round hole of the diameter between 2~3mm on spandrel girder 4, and it is adjacentThe distance between two round holes between 1~2mm, further, the thickness of the spandrel girder 4 is between 1~2mm.By the setting to spandrel girder 4, the intensity of porous tantalum shin bone cushion block can be significantly improved.
Further, the hole muscle diameter that the porous truss 5 in 4 outside of spandrel girder is arranged in is 0.6~1mm, in order to protectIt demonstrate,proves porous truss enough intensity is provided and guarantees soft tissue normal growth, it is preferable that on two sides of porous truss 5The aperture of setting is not identical.Specifically, the pore size of porous truss 5 and 4 contact area of spandrel girder is between 1.5~2.5mmBetween, the pore size with soft tissue contact area is between 0.6~1mm.
As shown in Figure 1, the third level pore structure 3 that porous tantalum shin bone cushion block provided by the embodiment of the utility model includes is mainIt is to be in contact with patient's bone tissue, since the inside of third level pore structure 3 is connected with standard rod, outside is in contact with bone tissue,In order to be conducive to adjust size in bone growth and edge operation, it is preferable that the hole muscle diameter that third level pore structure 3 includes is situated betweenIn between 0.3~0.6mm, pore size is between 0.4~0.6mm.
The utility model embodiment provides a kind of porous tantalum shin bone cushion block, wherein first order pore structure, second level pore structureThe aperture and hole muscle for including with third level pore structure may include it is a variety of, be based on above-mentioned difference, individually below with embodiment one toFor embodiment three, specifically to introduce different porous tantalum shin bone cushion blocks.
Embodiment one
As shown in Figure 1, the customization porous tantalum shin bone cushion block mainly include first order pore structure 1, second level pore structure 2 withAnd third level pore structure 3, wherein the bottom end on the top of second level pore structure 2 and third level pore structure 3 and first order pore structure 1It is in contact, and third level pore structure 3 half is wrapped in the inside of second level pore structure 2 by second level pore structure 2.
In practical applications, first order pore structure 1 is in contact with prosthese, and second level pore structure 2 is in contact with soft tissue, theThree-level pore structure 3 is in contact with bone tissue.It should be noted that porous tantalum shin bone cushion block packet provided by the embodiment of the utility modelThe tertiary structure included has different pore structures since contact surface is different, and the porosity of the porous tantalum shin bone cushion block can achieve78%.
Fig. 2 is first order pore structure provided by the embodiment of the utility model and second level pore structure schematic diagram, such as Fig. 2 instituteShow, since the first order pore structure 1 of porous tantalum shin bone cushion block needs to contact with the prosthese repaired of patient's needs, in order to repairThe prosthese changed is in contact, and prevents bone cement from penetrating into prosthese after avoiding contact with, it is preferable that included by first order pore structure 1Hole muscle diameter is between 2mm, and the size in aperture is 1.5mm.
As shown in Fig. 2, the second level pore structure 2 of porous tantalum shin bone cushion block provided by the embodiment of the utility model includes to holdWeight beam 4 and porous truss 5, wherein spandrel girder 4 is located inside porous truss 5, i.e., spandrel girder 4 is wrapped in interior by porous truss 5.It is in being wrapped in third level pore structure 3 half due to second level pore structure 2, i.e., vertical between spandrel girder 4 and third level pore structure 3Distance is less than the vertical range between porous truss 5 and third level pore structure 3.
Further, as shown in Fig. 2, being uniform-distribution with the round hole that diameter is 2.5mm on spandrel girder 4, and it is adjacentThe distance between two round holes be 1.5mm, further, the spandrel girder 4 with a thickness of 1.5mm.Pass through setting to spandrel girder 4It sets, the intensity of porous tantalum shin bone cushion block can be significantly improved.Furthermore the hole that the porous truss 5 that 4 outside of spandrel girder is arranged in includesMuscle diameter is 0.8mm, in order to guarantee that porous truss provides enough intensity and guarantee soft tissue normal growth, preferablyThe aperture on ground, the setting on two sides of porous truss 5 is not identical.Specifically, porous truss 5 and 4 contact area of spandrel girderPore size be 2mm, be 0.8mm with the pore size of soft tissue contact area.
As shown in Figure 1, the third level pore structure 3 that porous tantalum shin bone cushion block provided by the embodiment of the utility model includes is mainIt is to be in contact with patient's bone tissue, since the inside of third level pore structure 3 is connected with standard rod, outside is in contact with bone tissue,In order to be conducive to adjust size in bone growth and edge operation, it is preferable that the hole muscle diameter that third level pore structure 3 includes is0.4mm, pore size 0.5mm.
Specifically, which is 120g, and elasticity modulus 3.1GPa, compression strength 68MPa, chemical component is such asShown in table 1, meet the pure tantalum standard of YYT0966-2014 surgical implant metal material, skin-friction coefficient 1.1 is porous in guaranteeUnder the premise of tantalum is with the close elasticity modulus of cortex bone and high surface great friction coefficient, can meet simultaneously size, quality, intensity withAnd the problem of performance requirements such as later period Bone Ingrowth, operating time is substantially reduced, labor intensity and the patient of doctor are alleviatedPain.
Table 1 customizes porous tantalum shin bone cushion block chemical component table
| Element | C | O | N | H | Fe | Ti |
| Content (ppm) | 0.002 | 0.002 | 0.003 | 0.001 | 0.003 | 0.001 |
| Element | Si | Ni | W | Mo | Nb | |
| Content (ppm) | 0.003 | 0.001 | < 0.003 | < 0.002 | < | |
Embodiment two
The customization porous tantalum shin bone cushion block mainly includes first order pore structure 1, second level pore structure 2 and third level holeStructure 3, wherein the top of second level pore structure 2 and third level pore structure 3 is in contact with the bottom end of first order pore structure 1, and theThird level pore structure 3 half is wrapped in the inside of second level pore structure 2 by second level pore structure 2.
In practical applications, first order pore structure 1 is in contact with prosthese, and second level pore structure 2 is in contact with soft tissue, theThree-level pore structure 3 is in contact with bone tissue.It should be noted that porous tantalum shin bone cushion block packet provided by the embodiment of the utility modelThe tertiary structure included has different pore structures since contact surface is different, and the porosity of the tantalum shin bone cushion block can achieve 70%Left and right.
Since the first order pore structure 1 of porous tantalum shin bone cushion block needs to need the prosthese repaired to contact with patient, in order toEnough prostheses with modification are in contact, and prevent bone cement from penetrating into prosthese after avoiding contact with, it is preferable that 1 institute of first order pore structureIncluding hole muscle diameter be 2.5mm, and the size in aperture be 1mm.
The second level pore structure 2 of porous tantalum shin bone cushion block provided by the embodiment of the utility model includes spandrel girder 4 and moreHole truss 5, wherein spandrel girder 4 is located inside porous truss 5, i.e., spandrel girder 4 is wrapped in interior by porous truss 5.Due to the second levelIn third level pore structure 3 half is wrapped in by pore structure 2, i.e., the vertical range between spandrel girder 4 and third level pore structure 3 is less than moreVertical range between hole truss 5 and third level pore structure 3.
Further, be uniform-distribution on spandrel girder 4 diameter be 2mm round hole, and two adjacent round holes itBetween distance be 2mm, further, the spandrel girder 4 with a thickness of 2mm.By the setting to spandrel girder 4, can significantly improveThe intensity of porous tantalum shin bone cushion block.Furthermore the hole muscle diameter that the porous truss 5 that 4 outside of spandrel girder is arranged in includes is 1mm, isIt can guarantee that porous truss provides enough intensity and guarantees soft tissue normal growth, it is preferable that two of porous truss 5The aperture of setting on side is not identical.Specifically, the pore size of porous truss 5 and 4 contact area of spandrel girder is 1mm,Pore size with soft tissue contact area is 0.6mm.
The third level pore structure 3 that porous tantalum shin bone cushion block provided by the embodiment of the utility model includes mainly and patient boneTissue is in contact, and since the inside of third level pore structure 3 is connected with standard rod, outside is in contact with bone tissue, in order to be conducive toSize is adjusted in bone growth and edge operation, it is preferable that the hole muscle diameter that third level pore structure 3 includes is 0.6mm, apertureSize is 0.4mm.
Specifically, which is 150g, elasticity modulus 4GPa, compression strength 88MPa, and chemical component meetsThe pure tantalum standard of YYT0966-2014 surgical implant metal material, skin-friction coefficient 1.3.
Embodiment three
The customization porous tantalum shin bone cushion block mainly includes first order pore structure 1, second level pore structure 2 and third level holeStructure 3, wherein the top of second level pore structure 2 and third level pore structure 3 is in contact with the bottom end of first order pore structure 1, and theThird level pore structure 3 half is wrapped in the inside of second level pore structure 2 by second level pore structure 2.
In practical applications, first order pore structure 1 is in contact with prosthese, and second level pore structure 2 is in contact with soft tissue, theThree-level pore structure 3 is in contact with bone tissue.It should be noted that porous tantalum shin bone cushion block packet provided by the embodiment of the utility modelThe tertiary structure included has different pore structures since contact surface is different, and the porosity of the porous tantalum shin bone cushion block is 90%.
Since porous tantalum shin bone cushion block first order pore structure 1 needs to need the prosthese repaired to contact with patient, in order toIt is in contact with the prosthese of modification, and prevents bone cement from penetrating into prosthese after avoiding contact with, it is preferable that first order pore structure 1 is wrappedThe hole muscle diameter included is 1.5mm, and the size in aperture is 2mm.
The second level pore structure 2 of porous tantalum shin bone cushion block provided by the embodiment of the utility model includes spandrel girder 4 and moreHole truss 5, wherein spandrel girder 4 is located inside porous truss 5, i.e., spandrel girder 4 is wrapped in interior by porous truss 5.Due to the second levelIn third level pore structure 3 half is wrapped in by pore structure 2, i.e., the vertical range between spandrel girder 4 and third level pore structure 3 is less than moreVertical range between hole truss 5 and third level pore structure 3.
Further, be uniform-distribution on spandrel girder 4 diameter be 3mm round hole, and two adjacent round holes itBetween distance be 1mm, further, the spandrel girder 4 with a thickness of 1mm.By the setting to spandrel girder 4, can significantly improveThe intensity of porous tantalum shin bone cushion block.Furthermore the hole muscle diameter that the porous truss 5 that the outside of spandrel girder 4 is arranged in includes be 0.6mm itBetween, in order to guarantee that porous truss provides enough intensity and guarantee soft tissue normal growth, it is preferable that porous truss 5Two sides on setting aperture it is not identical.Specifically, the pore size of porous truss 5 and 4 contact area of spandrel girderFor 2.5mm, the pore size with soft tissue contact area is 1mm.
The third level pore structure 3 that porous tantalum shin bone cushion block provided by the embodiment of the utility model includes mainly and patient boneTissue is in contact, and since the inside of third level pore structure 3 is connected with standard rod, outside is in contact with bone tissue, in order to be conducive toSize is adjusted in bone growth and edge operation, it is preferable that the hole muscle diameter that third level pore structure 3 includes is 0.3mm, apertureSize is 0.6mm.
Specifically, which is 100g, elasticity modulus 2.2GPa, compression strength 55MPa, and chemical component is fullThe sufficient pure tantalum standard of YYT0966-2014 surgical implant metal material, skin-friction coefficient 1.0.
In conclusion the utility model embodiment provides a kind of customization porous tantalum shin bone cushion block, the shin bone cushion block rootIt is raw material through powder bed electron beam selective melting using spherical tantalum powder according to the bone situation of patient by three-D CT scanning, three-dimensional modelingTechnology preparation, the porosity of the shin bone cushion block is 70%~90%, including first order pore structure, second level pore structure and theThree-level pore structure；The bottom end phase on the top of the second level pore structure and the third level pore structure and the first order pore structureContact, and the third level pore structure is partly wrapped on the inside of the second level pore structure by the second level pore structure；Wherein, instituteFirst order pore structure is stated to be in contact with prosthese, the second level pore structure is in contact with soft tissue, the third level pore structure withBone tissue is in contact.Porous tantalum shin bone cushion block provided by the embodiment of the utility model is raw material through powder bed electronics using spherical tantalum powderBeam is chosen smelting technology and is shaped under vacuum conditions, and the pollution of the impurity elements such as oxygen in forming process, carbon, concise in technology are avoidedAnd cushion block precision is high, the position perfection repaired can be needed to agree with patient.Cushion block according to the difference of contact surface, pore structure also it is each notIt is identical, it on the one hand can prevent bone cement from penetrating into prosthese, be conducive to soft tissue growth while on the one hand can increasing cushion block intensity,On the other hand it can also be conducive to bone growth and convenient for adjusting size in operation.Porous tantalum provided by the embodiment of the utility modelShin bone cushion block can meet the problem of performance requirements such as size, quality, intensity and later period Bone Ingrowth simultaneously, substantially reduce operationTime alleviates the labor intensity of doctor and the pain of patient.
Although the preferred embodiment of the utility model has been described, once a person skilled in the art knows basicCreative concept, then additional changes and modifications may be made to these embodiments.It is wrapped so the following claims are intended to be interpreted asIt includes preferred embodiment and falls into all change and modification of the scope of the utility model.
Obviously, it is practical without departing from this can to carry out various modification and variations to the utility model by those skilled in the artNovel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims andWithin the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.