CN105147383B - A kind of porous tantalum metal hollow screw and application thereof - Google Patents
A kind of porous tantalum metal hollow screw and application thereof Download PDFInfo
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- CN105147383B CN105147383B CN201510712216.5A CN201510712216A CN105147383B CN 105147383 B CN105147383 B CN 105147383B CN 201510712216 A CN201510712216 A CN 201510712216A CN 105147383 B CN105147383 B CN 105147383B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/866—Material or manufacture
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/08—Materials for coatings
- A61L31/082—Inorganic materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00526—Methods of manufacturing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2420/00—Materials or methods for coatings medical devices
- A61L2420/02—Methods for coating medical devices
Abstract
The invention discloses a kind of porous tantalum metal hollow screw, including screw rod and nut, described screw rod and nut are integrated, the leading exterior surface of described screw rod has screw thread, the length of described screw thread and spiro rod length are than for 1:1.7 2.3, described nut is the tapered cup nut with cylindrical ailhead, the conical surface of described tapered cup nut is 44 46 ° with the angle of pitch line, two side external surfaces of described cylindrical ailhead have groove with pitch line symmetry, two inclined-plane angles of described groove are 60 °, the central shaft of described screw rod is provided with through hole, it it is smooth slide bar between described screw thread and nut.The structure of the hollow screw of the present invention, 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
The present invention relates to a kind of medical permanent implantation object, a kind of doctor for treatment of femoral neck fracture
With the porous tantalum metal hollow screw of implant.
Background technology
Fracture of femoral neck is clinical common disease.There is also certain dispute, most scholars for its treatment
Think that the Therapeutic Principle of Fresh Femoral Neck Fractures should make every effort in early days, anatomical reduction, fixedly secure；But at present
Methods of internal fixation the most all uses cannulated compression screw to fix.Made by the most employing titaniums
Hollow screw, although achieve certain clinical effectiveness at present, but it take out without induction osteogenesis, secondary
Deng clinical drawback.
It is important and special that porous medical metal implanted material has treatment osseous tissue wound and induction osteanagenesis etc.
Different purposes, existing common this kind of material has porous stainless steel, POROUS TITANIUM etc..As osseous tissue wound, lack
Damaging the porous embedded material that treatment uses, its porosity should reach 30-85%, and hole the most all connects
Be uniformly distributed, or aperture sections connection and being uniformly distributed as required, be allowed to both raw with the osseous tissue of human body
Long consistent, alleviate again the weight of material itself, implant with applicable human body and use.
Metal tantalum, to side effect such as human non-toxic's evils, has good biocompatibility and mechanical property, and they are many
Porous materials is expected to substitute aforementioned conventional medical metal biomaterial, becomes the main for the treatment of of femoral neck fracture field
Biomaterial.Along with developing rapidly of domestic and international medical science, to further cognitive as body implanting material of tantalum,
People become more and more urgent to the demand of human body implantation porous metals tantalum material, require it the most increasingly
High.Wherein as the medical embedded metal tantalum of porous, if can have the highest be uniformly distributed interconnected pore and
The physical and mechanical properties adapted with human body, then be to ensure that the heavy connection structure of freshman bone tissue's normal growth
Become material.
About this kind of material of porous tantalum, US5282861 discloses one and is applied to cancellous bone implants, cell
Perforate tantalum material and preparation thereof with tissue sensor.This porous tantalum is made up of pure business tantalum, and it is with poly-Asia
It is support that urethane precursor carries out the carbon skeleton that thermal degradation obtains, and this carbon skeleton is multiple dodecahedron, in it
For mesh-like structure, entirety spreads all over micropore, and porosity may be up to 98%, then is steamed by chemistry by pure for business tantalum
Gas deposition, the method for infiltration are attached on carbon skeleton form porous metals micro structure, are called for short chemical deposition.
The tantalum layer thickness on its surface of porous tantalum material that this method is obtained is between 40-60 μm；In whole porous
In material, tantalum proportion accounts for 99%, and carbon skeleton weight then accounts for about 1%.Document further states that, should
Comprcssive strength 50-70MPa of porous material, elastic modelling quantity 2.5-3.5GPa, tensile strength 63MPa, plasticity
Deflection 15%.
At present, the medical implant for treatment of femoral neck fracture that existing porous tantalum material makes is used
How the shortcomings such as porous tantalum metal hollow screw, biomechanics and biocompatibility are the most poor, improve its mechanics
Intensity and biocompatibility are important problems.
It is used clinically for the cannulated compression screw of fixed fracture of femoral neck at present, has various structures, such as metal
The hollow screw etc. of titanium material, has shorter triangle thread structure, and also other materials composition is hollow
Screws etc., its afterbody head of a nail mostly is circular configuration.Generally have that structure is complicated, biomechanics usefulness is strong,
Machinery dynamics is inadequate, need the clinical FAQs such as secondary taking-up, internal fixation screw the most usually occurs
Fracture, the problems such as displacement again of fracturing.
Summary of the invention
Present invention aims to the problem that above-mentioned existing cannulated compression screw exists, it is provided that one is used for
The porous tantalum metal hollow screw of fracture of femoral neck.This porous tantalum metal hollow bolt structure is simple, have relatively
Good mechanical strength and biopotency fixation performance preferable, interior, there is the high tissue compatibility simultaneously
And biomechanical property, osseous tissue can be induced to generate, it is simple to growing into of osseous tissue.
The technical scheme is that as follows:
A kind of porous tantalum metal hollow screw, including screw rod and nut, described screw rod and nut are one-body molded
, the leading portion outer surface of described screw rod has screw thread, it is characterised in that the length of described screw thread is long with screw rod
Degree ratio is 1:0.7-2.3, preferably 1:2；Described nut is the tapered cup nut with cylindrical ailhead, described cone
The angle of the conical surface of shape nut and pitch line is 44-46 °, two side external surfaces of described cylindrical ailhead with
Pitch line symmetry has groove, and two inclined-plane angles of described groove are 60 °, on the central shaft of described screw rod
It is provided with through hole, is smooth slide bar between described screw thread and nut.
Further, the pitch of described screw thread is 3.7-4.3mm, preferably 4mm, the width of described screw thread
For 1.7-2.3mm, preferably 2mm, the external diameter of described screw thread and the difference of internal diameter is screw diameter 7～13%,
Being preferably 10%, the lift angle of described screw thread is 90 ± 2 °；The favourable screw of this screw thread design subtracts during being screwed into
Slight drag and reduce conventional screw and need the step that uses other apparatuses to carry out self tapping before being screwed into, the intensification of screw thread,
Be conducive to the strong fixing of fracture site.
Further, the degree of depth of described groove is the 7-13% of described screw diameter, preferably 10%.
Further, the thickness of described nut is the 7-13% of described spiro rod length, preferably 10%.This sets
Meter strengthens the hold of hollow screw afterbody, is fixed firmly in cortical bone part, prevents screw from falling back and bone
Folding displacement.
Further, described screw thread is triangular form.The design reduces the self tapping process before screw enters, subtract
The further loss of few sclerotin, strengthens the interior fixing intensity of fracture.
Further, the tooth side angle of described screw thread is 30 °-50 °.This is designed with the fixing of beneficially screw.
Further, the 77-83% of a diameter of described screw diameter of described through hole, preferably 80%.
Further, one section away from nut of screw rod is screw front end, and described screw front end is that drift angle is
The cone of 30～120 °.
Further, the material that hollow screw described above uses is to utilize chemical gaseous phase depositing process, will
Tantalum metallic compound is reduced to tantalum metal powder, and uniform deposition forms tantalum coating and is prepared in graphitic carbon skeleton surface
Arriving, wherein said tantalum metallic compound is the one in tantalic chloride, fluorination tantalum；Described graphitic carbon skeleton
Porosity > 85%, aperture is 200-600 μm；The thickness of described tantalum coating is 40-60 μm.
The porosity of the above-mentioned material for preparing described porous tantalum metal hollow screw is 85%, and aperture is
200-600 μm, and the network structure that at least 80% polyhedron is interweaved, have the distribution of hole three-dimensional communication
Dodecahedron network structure, beneficially the growing into of osteocyte and tissue.
The present invention also provides for the preparation method of above-mentioned porous tantalum metal hollow screw, and this preparation method includes as follows
Step:
(1) by above-mentioned graphitic carbon skeleton dilute hydrochloric acid etch 10-20min, successively with after water and ethanol purge
Dry up with nitrogen, insert in reative cell；
(2) it is passed through place's process gases and hydrogen, at 900-1050 DEG C, vacuum 10-15Pa in reative cell simultaneously
Under the conditions of, react 4-6 hour；
Wherein: described place process gases comprises tantalum metallic compound and carrier gas, and tantalum metallic compound is put into carrying shield
In, it being heated 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 porous tantalum metal hollow screw of the present invention is false after can apply to bone does not connect, Cranial defect, tumor resection
The medical implant of volume reconstruction treatment.
Beneficial effects of the present invention:
1. at the screw nose threads of the present invention, relatively conventional hollow screw is long, and employing has cylindrical ailhead
Nut, and arrange the rectangular recess of certain degree (60 °) on cylindrical ailhead, such is designed with beneficially
Being screwed into of hollow screw and firm fixing, prevent the generation that fracture shifts again, overcome existing well
The profile counterbore class directly arranged on square or lug in technology and nut designs in use
Cortical bone of can not fitting and the most firm etc. fixing shortcoming；
2. the shortcoming of afterbody deformation when the screw of the present invention can avoid screw to be screwed into, so that homogeneous the reaching of power
Front end, decreases screw deformation and the possibility of fracture；Nut has pressurization, has better handle
Hold fixation；Avoid deformation and the fracture of the screw thread when implanting the hard sclerotin such as cortical bone；Without secondary
Operation is taken out, and alleviates patient suffering.
The generation of the porous tantalum metal hollow screw of the present invention, beneficially area of new bone and the effect of replacement bone, especially
The treatment of its fracture of femoral neck has preferable clinical effectiveness, overcomes existing titanium alloy " hollow screw " and exist
On clinical treatment not sufficiently effective.On the other hand, the material of the porous tantalum metal hollow screw of the present invention has ten
Dihedron space network, its structure is similar with Grafting Cancellous Bone Bolt girder, has the high tissue compatibility, can
Induction osseous tissue generates, it is simple to growing into of osseous tissue；And there is stronger biomechanical property, it is possible to provide
Certain mechanical support, reaches induction and substitutes the purpose of osseous tissue.The porous tantalum metal hollow spiral shell of the present invention
Nail, its preparation method is simple, low cost, is conducive to implementing and clinical practice, is suitable for the need of extensive patients
Want.
Accompanying drawing explanation
Fig. 1 is the structural representation of hollow screw of the present invention.
Drawing reference numeral: 1, screw rod, 11, screw thread, 12, screw front end, 2, nut, 21, groove
Detailed description of the invention
Following non-limiting example can make those of ordinary skill in the art that the present invention is more fully understood,
But limit the present invention never in any form.
Embodiment 1
As it is shown in figure 1, a kind of porous tantalum metal hollow screw, including screw rod 1 and nut 2, described screw rod 1
Being integrated with nut 2, the leading portion outer surface of described screw rod 1 has screw thread 11, described screw thread 11
Length and screw rod 1 length are than for 1:2, and described nut 2 is the tapered cup nut with cylindrical ailhead, described cone
The conical surface of shape nut is 45 ° with the angle of pitch line, and two side external surfaces of described cylindrical ailhead are with screw rod
Centrage symmetry has groove 21, and two inclined-plane angles of described groove 21 are 60 °, the center of described screw rod 1
Axle is provided with through hole, is smooth slide bar between described screw thread 11 and nut 2.
Wherein:
The pitch of described screw thread 11 is 4mm, and the width of described screw thread 11 is 2mm, described screw thread 11
The difference of external diameter and internal diameter is the 10% of screw rod 1 diameter, and the lift angle of described screw thread 11 is 91 °；This screw thread 11 sets
The strong solid of the process of self tapping and the intensification of screw thread 11, beneficially fracture site is reduced in respect of being screwed into of profit screw
Fixed.
The degree of depth of described groove 21 is the 10% of described screw rod 1 diameter.
The thickness of described nut 2 is the 10% of described screw rod 1 length；This design strengthens hollow screw afterbody
Hold, be fixed firmly in cortical bone part, prevent screw from falling back and displacement fracture.
Described screw thread 11 is triangular form, the design reduces the self tapping process before screw enters, reduces sclerotin
Lose further, strengthen the interior fixing intensity of fracture.
The tooth side angle of described screw thread 11 is 35 °, and this is designed with the fixing of beneficially screw.
The 80% of a diameter of described screw rod 1 diameter of described through hole.
One section away from nut 2 of screw rod 1 is screw front end 12, and described screw front end 12 is 120 ° for drift angle
Cone, the 3.3% of a length of spiro rod length of screw front end.
In features such as the specifically used middle size according to implant site, tissues, can suitably regulate described screw
Concrete size, to reach best therapeutic effect.
Embodiment 2
Porous tantalum metal hollow screw described in embodiment 1, prepares with the following method:
(1) by the graphitic carbon skeleton dilute hydrochloric acid etch 10min that porosity is 85%, successively with water and ethanol
Dry up with nitrogen after cleaning, insert 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) is that carrier gas is passed through to reative cell, and carrier gas flux is 100ml/min, and reaction chamber temperature is 1050
DEG C, reative cell vacuum is 10Pa；Reative cell is passed through and is passed through the same of tantalic chloride powder with argon for carrier gas
Time, it is passed through hydrogen, reduction reaction 4 hours with 120ml/min flow, makes to be reduced into the tantalum metal of metal dust
Uniform deposition, in graphitic carbon skeleton surface and its apparent gap, obtains the porous tantalum metal hollow screw of the present invention
Finished product.
The porosity of porous tantalum metal hollow screw body material is 85%, and elastic modelling quantity is 10GPa, maximum
Comprcssive strength is 35MPa., and wherein porosity is according to standard GB/T/T 21650.1-2008, elastic modelling quantity
For detecting according to the method described in standard GB/T/T 22315-2008.
Described porous tantalum metal hollow screw body material, has the dodecahedron net of hole three-dimensional communication distribution
Shape structure, its structure is similar with Grafting Cancellous Bone Bolt girder, has the high tissue compatibility, and osseous tissue can be induced raw
Become, it is simple to growing into of osseous tissue；And there is stronger biomechanical property, it is possible to provide certain mechanics props up
Support, reaches to promote union of fracture and reparation, the purpose of filling bone defects.
In above-mentioned preparation method, first graphitic carbon skeleton is processed into the shape described in Fig. 1, then through step
Suddenly the porous tantalum metal hollow screw of (1)～(2) its preparation cost invention.
Claims (10)
1. a porous tantalum metal hollow screw, is that one becomes including screw rod and nut, described screw rod and nut
Type, the leading exterior surface of described screw rod has screw thread, and the rear end of described screw rod connects nut, its feature
Being, the length of described screw thread and spiro rod length are than for 1:1.7-2.3, and described nut is to have cylindrical ailhead
Tapered cup nut, the conical surface of described tapered cup nut is 44-46 ° with the angle of pitch line, described tapered cup nut
Short cross-sectional be connected with the rear end of screw rod, two side external surfaces of described cylindrical ailhead are with pitch line pair
Claiming to have groove, the angle of two inclined-plane extended lines of described groove is 60 °, and the width of slot opening is more than groove
The width on base, the central shaft of described screw rod is provided with through hole, is smooth cunning between described screw thread and nut
Bar.
Porous tantalum metal hollow screw the most according to claim 1, it is characterised in that described screw thread
Pitch is 3.7-4.3mm, and the width of described screw thread is 1.7-2.3mm, the external diameter of described screw thread and the difference of internal diameter
For the 7-13% of screw diameter, the lift angle of described screw thread is 90 ± 2 °.
Porous tantalum metal hollow screw the most according to claim 1, it is characterised in that described groove
The degree of depth is the 7-13% of described screw diameter.
Porous tantalum metal hollow screw the most according to claim 1, it is characterised in that described nut
Thickness is the 7-13% of described spiro rod length.
Porous tantalum metal hollow screw the most according to claim 1, it is characterised in that described screw thread is
Triangular form.
Porous tantalum metal hollow screw the most according to claim 1, it is characterised in that described screw thread
Tooth side angle is 30 °-50 °.
Porous tantalum metal hollow screw the most according to claim 1, it is characterised in that described through hole
The 77-83% of a diameter of described screw diameter.
Porous tantalum metal hollow screw the most according to claim 1, it is characterised in that screw rod away from
One section of nut is screw front end, the cone that drift angle is 30～120 ° of described screw front end.
Described porous tantalum metal hollow screw the most according to claim 1, it is characterised in that described hollow
The material that screw uses is to utilize chemical gaseous phase depositing process, and tantalum metallic compound is reduced to tantalum metal powder,
Uniform deposition forms tantalum coating and prepares in graphitic carbon skeleton surface, and wherein said tantalum metallic compound is five
One in tantalic chloride, fluorination tantalum；The porosity of described graphitic carbon skeleton > 85%, aperture is 200-600 μm；
The thickness of described tantalum coating is 40-60 μm.
10. a preparation method for porous tantalum metal hollow screw as claimed in claim 9, its feature exists
In, comprise the steps:
(1) by the dilute hydrochloric acid etch 10-20min of graphitic carbon skeleton described in claim 9, successively by water and second
Alcohol dries up with nitrogen after cleaning, and inserts in reative cell；
(2) it is passed through place's process gases and hydrogen, at 900-1050 DEG C, vacuum 10-15Pa in reative cell simultaneously
Under the conditions of, react 4-6 hour；
Wherein: described place process gases comprises tantalum metallic compound and carrier gas, and tantalum metallic compound is put into carrying shield
In, it being heated 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.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712216.5A CN105147383B (en) | 2015-10-28 | 2015-10-28 | A kind of porous tantalum metal hollow screw and application thereof |
| EP16858774.9A EP3222234B1 (en) | 2015-10-28 | 2016-07-26 | Porous tantalum metal hollow screw |
| PCT/CN2016/091730 WO2017071335A1 (en) | 2015-10-28 | 2016-07-26 | Porous tantalum metal hollow screw and applications thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712216.5A CN105147383B (en) | 2015-10-28 | 2015-10-28 | A kind of porous tantalum metal hollow screw and application thereof |
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| Publication Number | Publication Date |
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| CN105147383A CN105147383A (en) | 2015-12-16 |
| CN105147383B true CN105147383B (en) | 2016-08-31 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3222234B1 (en) * | 2015-10-28 | 2020-10-21 | Zhao, Dewei | Porous tantalum metal hollow screw |
| EP3453351B1 (en) * | 2016-05-06 | 2021-09-08 | Zhao, Dewei | Porous tantalum metal screw for fixing broken bone, and application thereof |
| CN115635082A (en) * | 2022-10-12 | 2023-01-24 | 北京科技大学 | Degradable porous metal bone nail and additive manufacturing method thereof |
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| CN103480043A (en) * | 2013-09-26 | 2014-01-01 | 赵德伟 | Porous medical tantalum implant material and preparation method thereof |
| CN204428147U (en) * | 2014-12-27 | 2015-07-01 | 王建平 | A kind of neck of femur fixed mechanism and fracture of femoral neck fixed structure thereof |
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| CN1269198A (en) * | 1999-04-01 | 2000-10-11 | 陈永铵 | Femur neck and head fixing screw with interlocking fixation structure |
| CN202069679U (en) * | 2011-05-24 | 2011-12-14 | 山东省文登整骨医院 | Bone screw |
| CN103462730A (en) * | 2013-09-26 | 2013-12-25 | 赵德伟 | Porous tantalum rod and application of porous tantalum rod |
| CN103480043A (en) * | 2013-09-26 | 2014-01-01 | 赵德伟 | Porous medical tantalum implant material and preparation method thereof |
| CN204428147U (en) * | 2014-12-27 | 2015-07-01 | 王建平 | A kind of neck of femur fixed mechanism and fracture of femoral neck fixed structure thereof |
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