CN202060914U - Porous internal support for femoral head - Google Patents
Porous internal support for femoral head Download PDFInfo
- Publication number
- CN202060914U CN202060914U CN2011200992117U CN201120099211U CN202060914U CN 202060914 U CN202060914 U CN 202060914U CN 2011200992117 U CN2011200992117 U CN 2011200992117U CN 201120099211 U CN201120099211 U CN 201120099211U CN 202060914 U CN202060914 U CN 202060914U
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- China
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- hexahedro
- inner support
- rectangle
- support frame
- ribs
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Abstract
The utility model discloses a porous internal support for a femoral head, which is in a specified microstructure. Each part of the support consists of stacked units in same structures, and each small unit is a hexagonal rectangular frame consisting of 12 edges. The finished support is sufficient in strength while a support body has rough surface, and the interior of the support body is in a regular porous structure suitable for growth of bone tissues.
Description
Technical field
This utility model belongs to body implant, relates in particular to the structure of femoral head inner support frame.
Background technology
The common method of treatment of femur head necrosis is the core decompression art.Cause quickening collapse of the femoral head for preventing that the formed bone of core decompression art is damaged with the neck of femur weakness, people implant supporter with the power of providing support in femoral head inside.This implant is called as the femoral head inner support frame.Ideal femoral head inner support frame all should have and the akin loose structure of body bone tissue on its surface and frame body inside, is beneficial to osseous tissue and grows in stake body, realizes and the osseous tissue good combination.Commercially available femoral head inner support frame mostly is the machining process manufacturing at present, and its porosity and pore size, hole layout far can not reach desirable requirement.
The utility model content
The purpose of this utility model is to provide a kind of porous unit bone inner support frame, and its hole is suitable for osseous tissue and grows in bracing frame, has permanent structure support force in the good femoral head simultaneously, reduces or eliminates the stress barrier that causes because of elastic modulus difference.
This utility model adopts " Selective Laser Sintering ", and according to the model of computer graphics software design, as calculated after the layering of machine delamination software, the control laser beam scans sintering to metal dust, finishes the making of porous unit bone inner support frame again.
Its essence of this utility model porous unit bone inner support frame is loose structure, its microstructure is to be made of the identical or proximate junior unit body stack of shape, each junior unit body is the hexahedro frame body that is made of 12 ribs, wherein 4 ribs constitute a rectangular surfaces, relative up and down by two rectangular surfaces positions that 8 ribs constitute, the two sides is parallel; Between two rectangular surfaces perpendicular 4 ribs putting are being arranged up and down; In each hexahedro frame unit body, constitute up and down that 8 ribs of two rectangular surfaces are called crossbeam, support that 4 of two rectangular surfaces are perpendicular to put rib and be called vertical post.
The cross sectional shape of described beam and column can be rectangle or circle.Preferred compositions is, the cross section of 8 crossbeams is rectangle, and the cross section of 4 vertical posts is circle.
As optimization, 12 ribs that constitute a cell cube are isometric, and all " beam-beam " or " beam-post " junctions are the right angle, constitute just hexahedro framework, four parallel travelings of rib are respectively arranged, the length unanimity on three-dimensional.
Constitute the essence of this utility model femoral head inner support frame by the hexahedro frame unit body stack of countless rectangles.This utility model femoral head inner support frame macroscopic view tangent plane porosity is 30%-70%, and preferable porosity is 45%-55%, and pore-size is 300-800 μ m.
This utility model femoral head inner support frame is a flatness of improving device surface, for making edge shape rule, designing, adding man-hour to related cell cube employing compression or tensile method distortion unit framework, the holding unit lattice is complete when reaching surfacing, disconnected rib end do not occur.
The micron-sized hole of this utility model porous unit bone inner support frame, when guaranteeing the bracing frame sufficient intensity, the support body concave-convex surface causes, and the loose structure of the inner rule of support body provides the space for the osseous tissue growth, and the size of its hole and distribution are fit to the osseous tissue growth needs.
Description of drawings
Fig. 1 is this utility model femoral head inner support frame finished form figure;
Fig. 2 is an embodiment microscopic units of a this utility model femoral head inner support frame beam column construction sketch map;
Fig. 3 is another embodiment microscopic units beam column construction sketch map of this utility model femoral head inner support frame.
Parts that number in the figure is represented or position are: 1-bracing frame body; 2-bracing frame head; 3-bracing frame afterbody; 4-microscopic units crossbeam; The 5-microscopic units is indulged post; 6-microscopic units beam column is handed over node.
The specific embodiment
Below in conjunction with drawings and Examples this utility model is described further.
As shown in Figure 1, the general structure of this utility model porous unit bone inner support frame is identical with the applicant's patent application formerly " 201010573866.3 1 kinds of femoral head inner support frames ", the cylinder of forming by head 2, body 1, afterbody 3 three parts, its front end head 2 is a hemispherical, body 1 is cylindrical, and afterbody 3 is for being provided with externally threaded cylinder.Its microstructure is to be made of the identical junior unit body stack of structure, and each junior unit body is as Fig. 2 or hexahedro frame body shown in Figure 3.
Figure 2 shows that an embodiment of this utility model porous unit bone inner support frame microstructure.Be illustrated as a minor structure unit, this unit is the hexahedro frame body of hollow, rectangular that is made of 12 ribs, and there is a rectangular opening in each face.Two planar ribs 4 are called crossbeam about constituting, and have 8; The perpendicular rib of putting 5 is called vertical post between two planes, has 4.In embodiment illustrated in fig. 2,8 crossbeams are isometric, are square body, and 4 vertical posts are isometric, are cylinder.In the hexahedro framework of design rectangle embodiment illustrated in fig. 2, a side of the cross section length of side of beam, the diameter of section of post, lateral aperture long three equate, is 300-800 μ m, preferred 500 μ m.So the hole setting meets the osseous tissue growth needs.
Figure 3 shows that another embodiment of this utility model porous unit bone inner support frame microstructure.Its basic structure is with embodiment illustrated in fig. 2 identical, and difference is, all 12 ribs comprise crossbeam 4, vertical post 5, are cylindrical, and isometric, and the hexahedro framework of the rectangle that is combined into is square hexahedro framework; The length of side of beam, column section diameter and lateral aperture does not wait; It is spherical that beam column is handed over node 7 bulges.
In actual applications, any beam, post all can square column type and cylindrical between select.Numerously constitute the integral body of femoral head inner support frame as Fig. 2 or unit framework shown in Figure 3 stack, its porosity is 30-70%, pore-size 300-800 μ m.
For bracing frame surface and the related cell cube of edge, can adopt compression or tensile method distortion unit framework, to obtain the smooth of surface, the holding unit lattice is complete simultaneously, does not have disconnected rib end.
Claims (7)
1. porous unit bone inner support frame, it is characterized in that, its microstructure is to be made of the identical or proximate junior unit body stack of shape, each junior unit body is the hexahedro frame body that is made of 12 ribs, wherein 4 ribs constitute a rectangular surfaces, relative up and down by two rectangular surfaces positions that 8 ribs constitute, the two sides is parallel; Between two rectangular surfaces perpendicular 4 ribs putting are being arranged up and down; In each hexahedro frame unit body, constitute up and down that 8 ribs of two rectangular surfaces are called crossbeam, support that 4 of two rectangular surfaces are perpendicular to put rib and be called vertical post.
2. porous unit bone inner support frame according to claim 1 is characterized in that, the cross sectional shape that constitutes the beam and column of the hexahedro frame body of rectangle is rectangle or circle.
3. porous unit bone inner support frame according to claim 2 is characterized in that, the cross section that constitutes 8 beams of the hexahedro frame body of rectangle is rectangle, and the cross section of 4 posts is circle.
4. femoral head inner support frame according to claim 2 is characterized in that all beams of the hexahedro frame body of rectangle, column section are circle, and it is spherical that beam column is handed over the node bulge.
5. porous unit bone inner support frame according to claim 1 is characterized in that, all beams, the post that constitute the hexahedro frame body of rectangle are all isometric, and the hexahedro frame body of the rectangle of being formed is square hexahedro frame body.
6. according to the described porous unit bone of the arbitrary claim of claim 1-5 inner support frame, it is characterized in that, is 30%-70% by the hexahedro framework superimposed femoral head inner support frame macroscopic view tangent plane porosity that constitutes of rectangle, and pore-size is 300-800 μ m.
7. porous unit bone inner support frame according to claim 1 is characterized in that, the hexahedro frame unit body of rectangle that device surface and edge are related is distored special-shaped unit framework, and cell is complete, does not have disconnected rib end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200992117U CN202060914U (en) | 2011-04-07 | 2011-04-07 | Porous internal support for femoral head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200992117U CN202060914U (en) | 2011-04-07 | 2011-04-07 | Porous internal support for femoral head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202060914U true CN202060914U (en) | 2011-12-07 |
Family
ID=45054798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200992117U Expired - Lifetime CN202060914U (en) | 2011-04-07 | 2011-04-07 | Porous internal support for femoral head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202060914U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104224407A (en) * | 2014-09-15 | 2014-12-24 | 上海交通大学 | Rod-system pore structure and orthopedic implant with same |
| CN107174382A (en) * | 2017-06-21 | 2017-09-19 | 上海凯利泰医疗科技股份有限公司 | One species bone loose structure and spinal fusion device |
-
2011
- 2011-04-07 CN CN2011200992117U patent/CN202060914U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104224407A (en) * | 2014-09-15 | 2014-12-24 | 上海交通大学 | Rod-system pore structure and orthopedic implant with same |
| CN107174382A (en) * | 2017-06-21 | 2017-09-19 | 上海凯利泰医疗科技股份有限公司 | One species bone loose structure and spinal fusion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111207 |