CN205814410U - A kind of fracture fixation porous tantalum metallic screw - Google Patents
A kind of fracture fixation porous tantalum metallic screw Download PDFInfo
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- CN205814410U CN205814410U CN201620406230.2U CN201620406230U CN205814410U CN 205814410 U CN205814410 U CN 205814410U CN 201620406230 U CN201620406230 U CN 201620406230U CN 205814410 U CN205814410 U CN 205814410U
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- thread segment
- nose threads
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Abstract
The utility model discloses a kind of fracture fixation porous tantalum metallic screw, including screw body, the front end of screw body is provided with nose threads section, the rear end of described screw body is provided with rear end thread segment, it is smooth round bar between described nose threads section and rear end thread segment, it is characterized in that, the thread pitch of described rear end thread segment is less than the thread pitch of nose threads section, the depth of thread of described rear end thread segment is more than the depth of thread of nose threads section, two side external surfaces of the end of described rear end thread segment have groove with screw body centrage symmetry, two inclined-plane angles of described groove are 30 °.The structure of screw of the present utility model, is conducive to it to be screwed into and firm fixing, prevents the generation that fracture shifts again, the shortcoming of afterbody deformation when screw can be avoided to be screwed into so that power homogeneous reach front end, decrease screw deformation and the possibility of fracture.
Description
Technical field
This utility model relates to a kind of medical permanent implantation object, a kind of medical for treatment of femoral neck fracture
The porous tantalum metallic screw of implant.
Background technology
Fracture of femoral neck is clinical common disease, especially old neck of femur patient, may in the face of long-term bed or
The destiny of prosthetic replacement；Therefore there is also certain dispute for its treatment, most scholars think Fresh Femoral Neck Fractures
Therapeutic Principle should make every effort in early days, anatomical reduction, fixedly secure；But methods of internal fixation the most all uses hollow pressurization at present
Screw is fixed.The hollow screws used made by titanium the most clinically, although achieve certain clinical effectiveness at present more,
But it is without clinical drawback such as induction osteogenesis, secondary taking-up etc..
It is important and special that porous medical metal implanted material has treatment osseous tissue wound and induction osteanagenesis etc.
Purposes, existing common this kind of material has porous stainless steel, POROUS TITANIUM etc..The porous used as osseous tissue wound, defect treatment
Embedded material, its porosity should reach 30-85%, and hole the most all connects and is uniformly distributed, or hole as required
Part connects and is uniformly distributed, and is allowed to both consistent with the bone growth of human body, alleviates again the weight of material itself, with suitable
Close human body and implant use.
Metal tantalum, to side effect such as human non-toxic's evils, has good biocompatibility and mechanical property, its porous material
It is expected to substitute aforementioned conventional medical metal biomaterial, is expected to become the primary biological material in treatment of femoral neck fracture field.With
Developing rapidly of domestic and international medical science, to further cognitive as body implanting material of tantalum, people are to human body implantation porous
The demand of metal tantalum material becomes more and more urgent, more and more higher to its requirement.Wherein as the medical embedded metal tantalum of porous,
The highest it is uniformly distributed interconnected pore and the physical and mechanical properties adapted with human body if can have, is then to ensure that area of new bone
The heavy connection constituent material of tissue normal growth.
About this kind of material of porous tantalum, US5282861 discloses one and is applied to cancellous bone implants, cell and tissue sense
The perforate tantalum material of receiver and preparation thereof.This porous tantalum is made up of pure business tantalum, and it carries out thermal degradation with polyurethane precursor
The carbon skeleton obtained is support, and this carbon skeleton is multiple dodecahedron, is mesh-like structure in it, and entirety spreads all over micropore, hole
Gap rate may be up to 98%, then is attached on carbon skeleton to be formed many by pure for business tantalum by the method for chemical vapour deposition, infiltration
Mesoporous metal micro structure, is called for short chemical deposition.The tantalum layer thickness on its surface of porous tantalum material that this method is obtained is at 40-
Between 60 μm；In whole porous material, tantalum proportion accounts for 99%, and carbon skeleton weight then accounts for about 1%.Document is remembered further
Carry, comprcssive strength 50-70MPa of this porous material, elastic modelling quantity 2.5-3.5GPa, tensile strength 63MPa, amount of plastic deformation
15%.
It is used clinically for the screw of fixed fracture of femoral neck at present, mostly is cannulated compression screw, have various structures, such as gold
Belong to the hollow screw etc. of titanium material, there is shorter triangle thread structure, the also hollow screw etc. of other materials composition, its
The afterbody head of a nail mostly is circular configuration.Generally there is structure complexity, biomechanics usefulness dynamics the strongest, mechanical is inadequate, need secondary
, the most usually there is internal fixation screw fracture, the problems such as displacement again of fracturing in the clinical FAQs such as taking-up.
Utility model content
The purpose of this utility model is the problem existed for the above-mentioned screw being currently used for fixed fracture of femoral neck, carries
For a kind of porous tantalum metallic screw for fixed fracture of femoral neck.This porous tantalum metallic screw simple in construction, have preferably
Mechanical strength and biopotency fixation performance preferable, interior, there is the high tissue compatibility and biomechanical property simultaneously,
Osseous tissue can be induced to generate, it is simple to growing into of osseous tissue.
The technical solution of the utility model is as follows:
A kind of fracture fixation porous tantalum metallic screw, including screw body, the front end of screw body is provided with front end spiral shell
Stricture of vagina section, the rear end of described screw body is provided with rear end thread segment, is smooth between described nose threads section and rear end thread segment
Round bar, it is characterised in that the thread pitch of described rear end thread segment is less than the thread pitch of nose threads section, described rear end spiral shell
The depth of thread of stricture of vagina section is more than the depth of thread of nose threads section, and two side external surfaces of the end of described rear end thread segment are with screw
Body central line symmetry has groove, and two inclined-plane angles of described groove are 30 °.
Porous tantalum metallic screw described in technique scheme is solid screw.
Further, the thread pitch of rear end thread segment is 8～9:10 with the ratio of the thread pitch of nose threads section, described
The depth of thread of rear end thread segment is 10:8～9 with the ratio of the depth of thread of nose threads section.
Further, the described length of nose threads section and the length of screw body are than for 1:3.5～4.5.
Further, the length of described rear end thread segment and the length of screw body are than for 1:3.0～4.5.
Further, the length of described groove and the length of screw body are than for 1:8～10.
Further, screw thread and the rear end thread segment screw thread of nose threads section screw thread is wedge thread.Such design
Decrease the self tapping process before screw enters, reduce the further loss of sclerotin, strengthen the interior fixing intensity of fracture.
Further, described nose threads section screw thread is inch screw thread, and its thread form angle is 55 °.
Further, described rear end thread segment screw thread is metric thread, and its thread form angle is 60.
Further, in porous tantalum metallic screw of the present utility model, the maximum Major Diam of described nose threads section
Identical with the Major Diam of rear end thread segment, described Major Diam is 1.2-1.5:1 with the ratio of the diameter of screw round bar.Screw spiral shell
Bar refers to the unthreaded sections of non-screw.
The screw thread of the rear end thread segment of fracture fixation porous tantalum metallic screw of the present utility model is relative to nose threads
The screw thread of section, its pitch adds narrow, and the depth of thread is deepened, and such holding being designed with beneficially screw prevents it from moving back nail, is conducive to
The strong of fracture site is fixed.
Further, porous tantalum metallic screw described above, the material of employing is to utilize chemical gaseous phase depositing process, will
Tantalum metallic compound is reduced to tantalum metal powder, and uniform deposition is in graphitic carbon skeleton, carborundum skeleton or vitreous carbon fibers support table
Face forms tantalum coating and prepares, and wherein said tantalum metallic compound is the one in tantalic chloride, fluorination tantalum；Described graphitic carbon
Skeleton, silicon carbide support or the porosity of vitreous carbon fibers support > 85%, aperture is 200-600 μm；The thickness of described tantalum coating
For 40-60 μm.
The porosity of the above-mentioned material for preparing described porous tantalum metallic screw is 85%, and aperture is 200-600 μm, and
The network structure that at least 80% polyhedron is interweaved, has the dodecahedron network structure of hole three-dimensional communication distribution, favorably
In growing into of osteocyte and tissue.
This utility model also provides for the preparation method of above-mentioned fracture fixation porous tantalum metallic screw, comprises the steps:
(1) by described graphitic carbon skeleton, carborundum skeleton or vitreous carbon fibers support dilute hydrochloric acid etch 10-20min, depend on
Dry up with nitrogen after secondary water and ethanol purge, insert in reative cell；
(2) it is passed through place's process gases and hydrogen in reative cell, at 900-1050 DEG C, under the conditions of vacuum 10-15Pa, instead simultaneously
Answer 4-6 hour；
Wherein: described place process gases comprises tantalum metallic compound and carrier gas, puts in carrying shield by tantalum metallic compound, heating
To 120-250 DEG C, 300 DEG C of noble gases are that carrier gas is passed through to reative cell；
Described noble gas is one or both the mixing in argon, helium；
The flow of described place process gases is 80-100ml/min；
The flow of described hydrogen is 100-150ml/min.
The beneficial effects of the utility model:
Fracture fixation porous tantalum metallic screw the most of the present utility model has nose threads section and rear end thread segment, and
The screw thread of rear end thread segment is relative to the screw thread of nose threads section, and its pitch is narrower, and the depth of thread is deepened, and such design is favourable
Holding in screw prevents it from moving back nail, and beneficially fracture site is strong fixing.
Screw the most of the present utility model, two side external surfaces of the end of rear end thread segment are opened with screw body centrage symmetry
Fluted, as the handle part of tightening tool, two sides of handle part have screw thread, beneficially screw and the patch of cortical bone
Close, improve the screw fixation at fixed position, be difficult to loosen.
Screw the most of the present utility model, nose threads section screw thread is inch screw thread, its thread form angle 55 °, and rear end thread segment
Screw thread be metric thread, its thread form angle 60 °, such be designed with the strong fixing of beneficially screw, prevent it from loosening and move back nail
Phenomenon occurs.
When screw the most of the present utility model can avoid screw to be screwed into afterbody deformation shortcoming so that power homogeneous reach before
End, decreases screw deformation and the possibility of fracture；Handle part has screw thread, has better holding fixation；Avoid
The deformation of screw and fracture when implanting the hard sclerotin such as cortical bone；Take out without second operation, alleviate patient suffering.
The generation of porous tantalum metallic screw of the present utility model, beneficially area of new bone and the effect of replacement bone, especially femur
The treatment of fracture of cervical vertebra has preferable clinical effectiveness, the material of porous tantalum metallic screw of the present utility model have dodecahedron to stand
Body network structure, its structure is similar with Grafting Cancellous Bone Bolt girder, has the high tissue compatibility, and osseous tissue can be induced to generate, it is simple to
Growing into of osseous tissue；And there is stronger biomechanical property, it is possible to provide and certain mechanical support, reach induction and substitute bone
The purpose of tissue.Porous tantalum metallic screw of the present utility model, its preparation method is simple, low cost, is conducive to implementing and clinical
Application, is suitable for the needs of extensive patients.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model porous tantalum metallic screw.
Fig. 2 is the structural representation of the end recesses of this utility model porous tantalum metallic screw rear end thread segment.
Drawing reference numeral: 1, screw body, 11, nose threads section, 12, rear end thread segment, 13, screw body round bar, 2, recessed
Groove, L1, the length of nose threads section, L2, rear end thread segment and length, L3, the length of screw body round bar.
Detailed description of the invention
Following non-limiting example can make those of ordinary skill in the art that this utility model is more fully understood, but
Limit this utility model never in any form.
Embodiment 1
As shown in Figure 1-2, a kind of fracture fixation porous tantalum metallic screw, including screw body 1, the front end of screw body
Being provided with nose threads section 11, the rear end of described screw body is provided with rear end thread segment 12, described nose threads section and rear end
Being smooth round bar 13 between thread segment, described nose threads section 11, rear end thread segment 12 and round bar 13 are integral structures, institute
Two side external surfaces of the end stating rear end thread segment have groove with screw body centrage symmetry, two inclined-plane folders of described groove
Angle is 30 °, and this screw is solid screw.The total length of described screw body is 85mm, and described nose threads segment length L1 is
20.6mm, described rear end thread segment length L2 is 26mm, and length L3 of screw body round bar is 38.4mm, the length of described groove
For 10mm.Described nose threads section 11 is inch screw thread, and its thread form angle is 55 °, and the maximum Major Diam of preceding thread is 10.4mm,
The maximum little warp of screw thread is 7mm, and pitch is 4mm；Rear end thread segment 12 is metric thread, and its thread form angle is 60 °, and the screw thread of screw thread is big
Footpath is 10.4mm, and the maximum little warp of screw thread is 8mm, and pitch is 3.5mm；
In features such as the specifically used middle size according to implant site, tissues, can suitably regulate the concrete of described screw
Size, to reach best therapeutic effect.
Embodiment 2
Porous tantalum metallic screw described in embodiment 1, prepares with the following method:
(1) by graphitic carbon skeleton, carborundum skeleton or vitreous carbon skeleton dilute hydrochloric acid etch that porosity is 85%
10min, dries up with nitrogen with after water and ethanol purge successively, inserts in reative cell；
(2) it is that the 400 phosphoric carbon dusts of purpose are put in carrying shield by particle diameter, is heated to 150 DEG C, with high temperature argon (300
DEG C) it is that carrier gas is passed through to reative cell, carrier gas flux is 100ml/min, and reaction chamber temperature is 1050 DEG C, and reative cell vacuum is
10Pa；Reative cell is passed through while being passed through tantalic chloride powder with argon for carrier gas, is passed through hydrogen with 120ml/min flow,
Reduction reaction 4 hours, makes the tantalum metal uniform deposition being reduced into metal dust in bones such as graphitic carbon, carborundum, vitreous carbon fibers
Frame surface and its apparent gap, obtain porous tantalum metallic screw finished product of the present utility model.
The porosity of porous tantalum metallic screw bulk material is 85%, and elastic modelling quantity is 10GPa, and maximum compressive strength is
35MPa., wherein porosity is according to standard GB/T/T 21650.1-2008, and elastic modelling quantity is according to standard GB/T/T
Method detection described in 22315-2008.
Described porous tantalum metallic screw bulk material, has the dodecahedron network structure of hole three-dimensional communication distribution, its
Structure is similar with Grafting Cancellous Bone Bolt girder, has the high tissue compatibility, osseous tissue can be induced to generate, it is simple to growing into of osseous tissue；
And there is stronger biomechanical property, it is possible to provide and certain mechanical support, reach to promote union of fracture and reparation, filling
The purpose of Cranial defect.
In above-mentioned preparation method, first graphitic carbon skeleton, carborundum skeleton or vitreous carbon skeleton are processed into Fig. 1 institute
The shape stated, then through step (1)～(2), it is prepared as porous tantalum metallic screw of the present utility model.
Claims (8)
1. a fracture fixation porous tantalum metallic screw, including screw body, the front end of screw body is provided with nose threads
Section, the rear end of described screw body is provided with rear end thread segment, is smooth between described nose threads section and rear end thread segment
Round bar, it is characterised in that the thread pitch of described rear end thread segment is less than the thread pitch of nose threads section, described rear end screw thread
The depth of thread of section is more than the depth of thread of nose threads section, and two side external surfaces of the end of described rear end thread segment are with screw originally
Body centrage symmetry has groove, and two inclined-plane angles of described groove are 30 °.
Porous tantalum metallic screw the most according to claim 1, it is characterised in that the thread pitch of rear end thread segment and front end
The ratio of the thread pitch of thread segment is 8～9:10, the depth of thread of described rear end thread segment and the depth of thread of nose threads section
Ratio be 10:8～9.
Porous tantalum metallic screw the most according to claim 1, it is characterised in that the length of described nose threads section and screw
The length of body is than for 1:3.5～4.5.
Porous tantalum metallic screw the most according to claim 1, it is characterised in that the length of described rear end thread segment and screw
The length of body is than for 1:3.0～4.5.
Porous tantalum metallic screw the most according to claim 1, it is characterised in that the length of described groove and screw body
Length is than for 1:8～10.
Porous tantalum metallic screw the most according to claim 1, it is characterised in that nose threads section flighting rear end thread segment spiral shell
Stricture of vagina is wedge thread.
Porous tantalum metallic screw the most according to claim 1, it is characterised in that described nose threads section screw thread is spiral shell made in Great Britain
Stricture of vagina, its thread form angle is 55 °.
Porous tantalum metallic screw the most according to claim 1, it is characterised in that described rear end thread segment screw thread is metric system spiral shell
Stricture of vagina, its thread form angle is 60 °.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620406230.2U CN205814410U (en) | 2016-05-06 | 2016-05-06 | A kind of fracture fixation porous tantalum metallic screw |
| EP16900959.4A EP3453351B1 (en) | 2016-05-06 | 2016-07-26 | Porous tantalum metal screw for fixing broken bone, and application thereof |
| PCT/CN2016/091733 WO2017190437A1 (en) | 2016-05-06 | 2016-07-26 | Porous tantalum metal screw for fixing broken bone, and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620406230.2U CN205814410U (en) | 2016-05-06 | 2016-05-06 | A kind of fracture fixation porous tantalum metallic screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205814410U true CN205814410U (en) | 2016-12-21 |
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ID=58148004
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620406230.2U Active CN205814410U (en) | 2016-05-06 | 2016-05-06 | A kind of fracture fixation porous tantalum metallic screw |
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| CN (1) | CN205814410U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108245283A (en) * | 2016-12-28 | 2018-07-06 | 重庆润泽医药有限公司 | Orthopedic operating tantalum bar device |
| CN108245282A (en) * | 2016-12-28 | 2018-07-06 | 重庆润泽医药有限公司 | Orthopedic operating tantalum stick equipment |
-
2016
- 2016-05-06 CN CN201620406230.2U patent/CN205814410U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108245283A (en) * | 2016-12-28 | 2018-07-06 | 重庆润泽医药有限公司 | Orthopedic operating tantalum bar device |
| CN108245282A (en) * | 2016-12-28 | 2018-07-06 | 重庆润泽医药有限公司 | Orthopedic operating tantalum stick equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220225 Address after: Department of orthopedics, Zhongshan Hospital Affiliated to Dalian University, No.6 Jiefang street, Zhongshan District, Dalian, Liaoning, 116001 Patentee after: Zhao Dewei Address before: Department of orthopedics, Zhongshan Hospital Affiliated to Dalian University, No.6 Jiefang street, Zhongshan District, Dalian, Liaoning, 116001 Patentee before: Zhao Dewei Patentee before: Wang Benjie Patentee before: Xie Hui Patentee before: Liu Baoyi Patentee before: Ma Zhijie Patentee before: Wang Wei |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230901 Address after: Room 201, 2nd Floor, Huatang Building, No. 203 Jinma Road, Economic and Technological Development Zone, Dalian City, Liaoning Province, 116600 Patentee after: Weitan (Dalian) Biomaterials Co.,Ltd. Address before: Department of orthopedics, Zhongshan Hospital Affiliated to Dalian University, No.6 Jiefang street, Zhongshan District, Dalian, Liaoning, 116001 Patentee before: Zhao Dewei |
|
| TR01 | Transfer of patent right |