CN209315980U - A kind of reamer for hip arthroplasty,acetabulum - Google Patents
A kind of reamer for hip arthroplasty,acetabulum Download PDFInfo
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- CN209315980U CN209315980U CN201822015909.0U CN201822015909U CN209315980U CN 209315980 U CN209315980 U CN 209315980U CN 201822015909 U CN201822015909 U CN 201822015909U CN 209315980 U CN209315980 U CN 209315980U
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- reamer
- hip arthroplasty
- cutting edge
- acetabulum
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Abstract
The utility model discloses a kind of reamer for hip arthroplasty,acetabulum, comprising: shell is hemispherical dome structure, and bottom has opening, and inside has accommodating chamber；Protrusion is polygonal pyramid shape structure and is arranged in the case top；Multiple chip spaces, open up on the housing, and are circumferentially arranged along the shell；Multiple cutting edges are arranged in the housing outer surface, and match setting with the chip space, and the cutting edge is raised elongate configuration, and side is provided with cutting edge；Wherein, the cutting edge is identical as the chip removal slot length, interlaced arrangement between multiple cutting edges；Connecting rod is arranged radially in the housing bottom.This reamer for hip arthroplasty,acetabulum is staggered strip cutting edge, and the hemispherical that the acetabular fossa after cutting is, so that acetabular component and acetabular bone form good press-fitting, promotes Bone Ingrowth without section.Cutting edge longer dimension, abrasion resistance properties are good.By the way that bulge-structure is arranged at the top of reamer for hip arthroplasty,acetabulum, prevent from being cut to extra bone at the top of acetabular fossa.
Description
Technical field
The utility model relates to a kind of reamer for hip arthroplasty,acetabulum, belong to hip replacement surgery field of tool.
Background technique
Replacement of Hip Joint can effectively eliminate arthralgia, rebuild function of joint and correct deformity, to mention
High patients ' life quality.Artificial hip joint is one kind of artificial joint, copies the structure of human hip, from thigh upper end
Metallic rod is injected, has a metal ball at the top of bar, instead of fixing an acetabular component, metal ball in acetabular fossa at the top of femur
It can be in acetabular fossa.
The pelvis of human body is connected with thigh through hip joint, and hip joint can live to people once being damaged and cause serious inconvenience.
Hip prosthesis, also referred to as artificial hip joint, artificial hip prosthesis copy the structure of human hip, and the bright portion of prosthese is inserted into stock
In ossis, bending and stretching and moving for femur is realized at rotation using head and cotyla or prosthese are metal cup-shaped, artificial hip is closed
Section is hip joint because of the substitute when causes of disease such as arthritis are impaired, is a kind of manikin, main component has titanium and cobalt chromium to close
The special materials such as the specialty metals such as gold, and ceramics, high molecular material after artificial femoral articulation is transplanted on human body, are never permitted
Perhaps side effect and corrosion are generated, it is desirable that there is high-strength durable, be a kind of high-tech accurate medical product.
Myelocavity file is a kind of hip replacement surgery tool, by reamer for hip arthroplasty,acetabulum by after acetabular fossa filing molding, is implanted into hip
Mortar prosthese.The bone of acetabular bone is cut when the working principle of reamer for hip arthroplasty,acetabulum is high speed rotation using the cutting edge on surface, and passes through chip removal
Bone bits are discharged in hole, finally cut into acetabular fossa and the consistent hemispherical of its shape.
Currently marketed reamer for hip arthroplasty,acetabulum is the poroid edge protuberance structure twist arranged, and is limited by product structure,
During reamer for hip arthroplasty,acetabulum rotation, the gap (without the place of poroid protrusion) of helix cannot play the role of cutting, therefore
It not is proper hemispherical, bone face out-of-flatness, for biological fixation type with the acetabular bone shape that this reamer for hip arthroplasty,acetabulum filing goes out
For acetabular component, the tight fit being unable to reach between bone face and prosthetic surface, cannot obtain initial stage it is stable Bone Ingrowth effect
Fruit.
Need closely to arrange due to the limitation of reamer for hip arthroplasty,acetabulum structure, between tooth and tooth, result in this way the size of each tooth compared with
Small, blade size is also relatively small, can make blade rust with during bone grinding for a long time, and influence reamer for hip arthroplasty,acetabulum uses the longevity
Life.
Utility model content
The utility model has designed and developed a kind of reamer for hip arthroplasty,acetabulum, can be by acetabular bone by staggered cutting edge and chip space
Nest cutting is in complete semiglobe, so that the bone face being cut is not had section, and by the way that bulge-structure is arranged at the top of reamer for hip arthroplasty,acetabulum,
It can prevent from being cut to extra bone at the top of acetabular fossa.
Technical solution provided by the utility model are as follows:
A kind of reamer for hip arthroplasty,acetabulum, comprising:
Shell is hemispherical dome structure, and bottom has opening, and inside has accommodating chamber；
Protrusion is polygonal pyramid shape structure and is arranged in the case top；
Multiple chip spaces, open up on the housing, and are circumferentially arranged along the shell；
Multiple cutting edges are arranged in the housing outer surface, and match setting with the chip space, the cutting
Sword is the elongate configuration of protrusion, and side is provided with cutting edge；
Wherein, the cutting edge is identical as the chip removal slot length, interlaced arrangement between multiple cutting edges；
Connecting rod is arranged radially in the housing bottom.
Preferably, the cutting edge is polygon prism structure.
Preferably, the connecting rod is cross connecting rod, and is detachably connected with the shell.
Preferably, connecting hole is symmetrically arranged in the connecting rod.
Preferably, the shell selects stainless steel material.
Preferably, the radius of the shell is 34-66mm.
Preferably, the length of the cutting edge and the chip space is 3-25mm.
Preferably, the width of the chip space is 1-3mm.
Preferably, the cutting edge cutting edge is 1-3mm at a distance from the housing outer surface.
Preferably, spaced set between the adjacent chip space.
It is described in the utility model the utility model has the advantages that by strip cutting edge cut acetabular fossa bone, bone bits passes through row
Consider slot discharge to be worth doing.Since cutting edge is in staggered, acetabular fossa can be cut into complete hemispherical, bone face is not broken
Face, the acetabular fossa sphere diameter after cutting are equal with reamer for hip arthroplasty,acetabulum outer profile sphere diameter.Polygonal pyramid protrusion at the top of reamer for hip arthroplasty,acetabulum can play hinge
The function of knife, the extra bone that cutting acetabular fossa top cannot be cut to by strip cutting edge.
The reamer for hip arthroplasty,acetabulum that this patent is related to is staggered strip cutting edge, and the acetabular fossa after cutting is truly
Hemispherical so that acetabular component and acetabular bone form good press-fitting, promote Bone Ingrowth without section.This patent is related to simultaneously
Reamer for hip arthroplasty,acetabulum cutting edge longer dimension, abrasion resistance properties are good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of reamer for hip arthroplasty,acetabulum described in the utility model.
Fig. 2 is the main view of reamer for hip arthroplasty,acetabulum described in the utility model.
Fig. 3 is the A-A cross-sectional view of reamer for hip arthroplasty,acetabulum described in the utility model.
Fig. 4 is the top view of reamer for hip arthroplasty,acetabulum described in the utility model.
Fig. 5 is the bottom view of reamer for hip arthroplasty,acetabulum described in the utility model.
Fig. 6 is the axonometric drawing of reamer for hip arthroplasty,acetabulum described in the utility model.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
As shown in figures 1 to 6, the utility model provides a kind of reamer for hip arthroplasty,acetabulum, including hemispheric shell 100, on shell 100
Multiple chip spaces 130 are offered along shell circumferencial direction, on the outer surface of shell 100, positioned at 130 top of chip space,
Matching be provided with cutting edge 120, the bottom of shell 100 radially, be detachably matched with connecting rod 140.
Myelocavity file is a kind of hip replacement surgery tool, by Myelocavity file by after acetabular fossa filing molding, is implanted into hip
Mortar prosthese.The bone of acetabular bone is cut when the working principle of Myelocavity file is high speed rotation using the cutting edge on surface, and passes through chip removal
Bone bits are discharged in hole, finally cut into acetabular fossa and the consistent hemispherical of its shape.
The shell 100 of reamer for hip arthroplasty,acetabulum is hemispherical dome structure, and the bottom of shell 100 has hatch frame, and inside has sky
Chamber.
In the present invention, as a preference, the material selection stainless steel of shell 100.
In another embodiment, the radius of shell is 34-66mm.
On shell 100, multiple chip spaces 130 are offered, chip space is arranged along the circumferencial direction of shell 100, chip removal
Slot 130 is curved rectangular parallelepiped structure, and section is rectangle, and the spacing between adjacent chip space 100 is equal, makes multiple chip spaces
Being arranged on shell 100 between 130 at equal intervals, the circumferencial direction due to multiple chip spaces 130 along shell 100 arrange, because
This, forms multi-turn and arranges 130 structure of slot.
In the present invention, from case top to shell 100 bottom, at least equidistantly arrange around offering three circles
130 structure of chip space.
On the outer wall of shell 100, positioned at the top of chip space 130, is matched with chip space 130 and be provided with multiple cutting edges
120, multiple cutting edges 130 are the strip structure of protrusion, and the side of cutting edge 120 has cutting edge, can be used to acetabular fossa
Bone cut.The side of cutting edge 120 has cutting edge, and the other side is fixedly connected with the casing, and the both ends of cutting edge 120 are
Closed end, and the length of cutting edge 120 is identical with the length of chip space 130.
In another embodiment, the length of cutting edge 120 and chip space 130 is 3-25mm, and the width of chip space 130 is 1-
3mm, cutting edge cutting edge are 1-3mm at a distance from 100 outer surface of shell.
In the present invention, as a preference, selecting the cutting edge of polygon prism structure.
In the bottom of shell 100, it is radially detachably provided with connecting rod 140, connecting rod 140 is cross connection
Bar, and in connecting rod 140, in 140 therein connecting rods of cross connecting rod, connecting hole 141 is symmetrically offered, even
Connecing hole 141 is rectangular parallelepiped structure, and the both ends of connecting rod 140 have semicircular section.
Connecting rod 140 is connect by connecting handle with power tool, and the torque that power tool exports is passed to hip by handle
Mortar file, reamer for hip arthroplasty,acetabulum start high speed rotation, and the bone of acetabular fossa is cut by strip cutting edge, and bone bits are discharged by chip space.
Since cutting edge is in staggered, acetabular fossa can be cut into complete hemispherical, bone face does not have section, after cutting
Acetabular fossa sphere diameter is equal with reamer for hip arthroplasty,acetabulum outer profile sphere diameter.Meanwhile the polygonal pyramid protrusion 110 at the top of reamer for hip arthroplasty,acetabulum can play reamer
Function, cutting acetabular fossa top cannot cut the bone of acetabular fossa by strip cutting edge, and bone bits pass through chip space and be discharged.By
It is in staggered in cutting edge, therefore acetabular fossa can be cut into complete hemispherical, bone face does not have section, the hip after cutting
Mortar nest sphere diameter is equal with reamer for hip arthroplasty,acetabulum outer profile sphere diameter.
The reamer for hip arthroplasty,acetabulum that this patent is related to is staggered strip cutting edge, and the acetabular fossa after cutting is truly
Hemispherical so that acetabular component and acetabular bone form good press-fitting, promote Bone Ingrowth without section.This patent is related to simultaneously
Reamer for hip arthroplasty,acetabulum cutting edge longer dimension, abrasion resistance properties are good.The extra bone being cut to by strip cutting edge.
Test example
Firstly, carry out preparation of samples, the utility model relates to reamer for hip arthroplasty,acetabulum 3D model specification be 44, randomly select 5
Same specification the utility model relates to reamer for hip arthroplasty,acetabulum and common acetabular cup, number it is as follows:
Then, preparation foam acetabular bone 10, scanner and auxiliary instrument, including reamer for hip arthroplasty,acetabulum handle, power tool, bubble
Foam bone fixture.
The 3D model shape filed by the 3D model and typical acetabular of reamer for hip arthroplasty,acetabulum involved in software verification the utility model
At enveloping solid whether be hemispherical, and proceed as follows
With foam bone fixture fixed foam bone, connect the utility model relates to reamer for hip arthroplasty,acetabulum and reamer for hip arthroplasty,acetabulum handle, use acetabular bone
File grinding acetabular fossa, it is ensured that the grinding depth of each reamer for hip arthroplasty,acetabulum is consistent, takes out reamer for hip arthroplasty,acetabulum.
By scanner scanning foam bone acetabular fossa, the acetabular fossa being ground is rebuild using reconstruction software, and counts
The closing product of acetabular fossa after calculating grinding.
Similarly, it is filed with typical acetabular and prepares acetabular fossa, the closed volume after acetabular fossa grinding is calculated after scan rebuilding.
Test result
The utility model relates to reamer for hip arthroplasty,acetabulum rotation after the enveloping solid that is formed be hemispherical, formed after typical acetabular file rotation
Enveloping solid be polymorphic structure, be not hemispherical, and volume is less than the Myelocavity file that this patent is related to.
Compared with traditional Myelocavity file, the utility model relates to reamer for hip arthroplasty,acetabulum can grind away more acetabular bone bone amount, it is ensured that
It is hemispherical truly after acetabular fossa grinding.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (10)
1. a kind of reamer for hip arthroplasty,acetabulum characterized by comprising
Shell is hemispherical dome structure, and bottom has opening, and inside has accommodating chamber；
Protrusion, setting are polygonal pyramid shape structure in the case top；
Multiple chip spaces, open up on the housing, and are circumferentially arranged along the shell；
Multiple cutting edges are arranged in the housing outer surface, and match setting with the chip space, and the cutting edge is
Strip bulge-structure, side are provided with cutting edge；
Wherein, the cutting edge is identical as the chip removal slot length, interlaced arrangement between multiple cutting edges；
Connecting rod is arranged radially in the housing bottom.
2. reamer for hip arthroplasty,acetabulum according to claim 1, which is characterized in that the cutting edge is polygon prism structure.
3. reamer for hip arthroplasty,acetabulum according to claim 2, which is characterized in that the connecting rod be cross connecting rod, and with it is described
Shell is detachably connected.
4. reamer for hip arthroplasty,acetabulum according to claim 3, which is characterized in that be symmetrically arranged with connecting hole in the connecting rod.
5. reamer for hip arthroplasty,acetabulum according to claim 4, which is characterized in that the shell selects stainless steel material.
6. reamer for hip arthroplasty,acetabulum according to claim 5, which is characterized in that the radius of the shell is 34-66mm.
7. reamer for hip arthroplasty,acetabulum according to claim 6, which is characterized in that the length of the cutting edge and the chip space is 3-
25mm。
8. reamer for hip arthroplasty,acetabulum according to claim 7, which is characterized in that the width of the chip space is 1-3mm.
9. reamer for hip arthroplasty,acetabulum according to claim 8, which is characterized in that the cutting edge cutting edge and the housing outer surface away from
From for 1-3mm.
10. reamer for hip arthroplasty,acetabulum according to claim 9, which is characterized in that spaced set between the adjacent chip space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822015909.0U CN209315980U (en) | 2018-12-04 | 2018-12-04 | A kind of reamer for hip arthroplasty,acetabulum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822015909.0U CN209315980U (en) | 2018-12-04 | 2018-12-04 | A kind of reamer for hip arthroplasty,acetabulum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209315980U true CN209315980U (en) | 2019-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822015909.0U Active CN209315980U (en) | 2018-12-04 | 2018-12-04 | A kind of reamer for hip arthroplasty,acetabulum |
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| CN (1) | CN209315980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112155646A (en) * | 2020-09-29 | 2021-01-01 | 北京市春立正达医疗器械股份有限公司 | Bone file |
-
2018
- 2018-12-04 CN CN201822015909.0U patent/CN209315980U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112155646A (en) * | 2020-09-29 | 2021-01-01 | 北京市春立正达医疗器械股份有限公司 | Bone file |
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