CN109187181A - Bone tissue-metal implant complex in-situ mechanical test device and method - Google Patents
Bone tissue-metal implant complex in-situ mechanical test device and method Download PDFInfo
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- CN109187181A CN109187181A CN201810951836.8A CN201810951836A CN109187181A CN 109187181 A CN109187181 A CN 109187181A CN 201810951836 A CN201810951836 A CN 201810951836A CN 109187181 A CN109187181 A CN 109187181A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
Abstract
A kind of bone tissue-metal implant complex in-situ mechanical test device is provided, including in-situ scanning electron microscope, test platform is set on in-situ scanning electron microscope, test platform, which is equipped with, fixes to clamp fixture for bone tissue-metal implant complex clamping, analog loading device is additionally provided on test platform, bone tissue-metal implant complex includes bone tissue and metal implant, bone tissue and metal implant are respectively respectively arranged with strain-ga(u)ge transducer at outer surface and the two combination interface, analog loading device simulation plus load is simultaneously applied on bone tissue-metal implant complex, microstructure deformation and micromechanism of damage evolution process of the bone tissue-metal implant complex during plus load are precisely observed by in-situ scanning electron microscope, bone tissue is acquired by strain-ga(u)ge transducer, metal implant and the two combination circle Biomechanical property parameter at face, the stress transmission mechanism between the biomechanical compatibility evaluation and announcement dissimilar material of metal implant provide theoretical direction.
Description
Technical field
The invention belongs to human body implant detection technique fields, and in particular to a kind of bone tissue-metal implant complex original position power
Learn performance testing device and method.
Background technique
In recent years, the clinical surgical implant demand cumulative year after year to long service.Anticipate the year two thousand thirty, full hip-joint is set
Changing art amplification will be up to 174% (about 57.2 ten thousand), and knee replacements amplification is up to 673% (about 3,480,000).Non-clinical statistical data
When showing some patientss 10 years or so after surgery, since the metals such as implantable artificial joint, dental implant are implanted into prosthese and body bone
" long term, which is on active service, fail " such as biomethanics matching between tissue are bad, and beginning occurs prosthetic loosening successively, sinks or fracture is existing
As accounting for the 80% of revision procedure, bringing heavy burden to patient and family members' economy and life.The biomethanics phase of planting body
Capacitive mainly includes 3 aspects: (1) when bearing certain load, it is existing that severely deformed or fracture failure etc. does not occur planting body for guarantee
As；(2) planting body can produce sufficient stress transfer to bone tissue, avoid the occurrence of bone and wither in vivo during long service
Contracting, implant loosen；(3) the stress value limit that planting body transmits bone tissue avoids out no more than Human Physiology limit
Existing bone tissue secondary insult or bone resorption.After metal implant is implanted into bone tissue, Integrated implant interface is formed, when bearing load, is planted
There are three kinds of tension types on body, bone tissue and its interface: compression, tensile stress and shear stress.Wherein, tensile stress and shearing
Excessive stress is the principal element for causing combination interface damage inactivation.Since metal implants body long service is in human body complex physiologic
Environment, reliability, safety and the life prediction of implant material seem particularly significant.Pass through mechanics machine test material itself
Performance parameter (intensity, elasticity modulus, hardness), be the important means evaluated material mechanical performance.But tradition is set
The standby overwhelming majority is single load detection, and being unable to satisfy the Measurement of Material Mechanical Performance under complicated Service Environment can with safety
By property evaluation.It is therefore desirable to propose to improve.
Summary of the invention
Present invention solves the technical problem that: a kind of bone tissue-metal implant complex in-situ mechanical test dress is provided
It sets and method, the present invention can precisely observe bone tissue-metal implant composite samples during simulating plus load in situ
Microstructure deformation and micromechanism of damage evolution process, meanwhile, related mechanical performance data can be acquired in real time automatically, for metal plant
The stress transmission mechanism for entering the biomechanical compatibility evaluation between object and body bone tissue and disclosing between dissimilar material provides
Theoretical direction.
The technical solution adopted by the present invention: bone tissue-metal implant complex in-situ mechanical test device, including original
Bit scan electron microscope, it is horizontal on the in-situ scanning electron microscope to be equipped with test platform, the test platform upper surface
It is fixed on one side and bone tissue-metal implant complex carry out level clamping is fixed to clamp into fixture, on the test platform
End face another side is equipped with to bone tissue-metal implant complex force analog loading device, and the bone tissue-metal implant is multiple
Zoarium includes combination in the bone tissue of one and metal implant, the bone tissue and the respective outer surface of metal implant and bone group
It knits and is mounted on strain-ga(u)ge transducer at metal implant combination interface, the analog loading device simulates metal implant in people
Plus load suffered by body corresponding position is simultaneously applied on bone tissue-metal implant complex, passes through the in-situ scanning electronics
Microstructure deformation and micromechanism of damage differentiation of the microscope to bone tissue-metal implant complex during by plus load
Process carries out precisely observation in situ, by the strain-ga(u)ge transducer to each at bone tissue, metal implant and the two combination interface
The biomechanical property Parameters variation at position carries out real-time monitoring and acquisition.
Wherein, the fixture that fixes to clamp is using collet clamping structure, specifically, the collet clamping structure includes taper
Collet body, tapered sleeve, clamping sleeve and support base are fixed with fixing seat on the test platform, and the fixing seat side is connected with
Support base, spring is equipped in the support base inner cavity, and spring side level is equipped with conical chuck body, the conical chuck body
Forward outer surface is cone, and the tapered sleeve is placed on outside conical chuck body, and tapered sleeve inner surface front is and conical chuck
The conical inner surface of the conical external surface adaptation of body, the clamping sleeve are placed on outside tapered sleeve, and the clamping sleeve front end is equipped with
Radially toward annular convex platform that is projecting inward and pushing down tapered sleeve front end, clamping sleeve inner surface rear portion passes through helicitic texture and branch
Support seat outer surface screws, and the clamping sleeve moves to left during threaded engagement presses tapered sleeve movement, and the tapered sleeve passes through conical surface knot
Structure drives conical chuck body to clamp bone tissue-metal implant complex.
The fixture that fixes to clamp is using double fastener block clamping structure, specifically, the double fastener block clamping structure includes fixing
In the pedestal on test platform, described pedestal both sides of the upper end is equipped with support plate, and screw thread level screws in each support plate
There is screw rod, two screw rod opposite ends are equipped with fixture block, are equipped with the cunning for being moved along it fixture block in the middle part of the pedestal upper surface
Road.
The analog loading device includes the vertical vertical beam for being set to test platform upper surface one side, is set vertically on the vertical beam
There is sliding rail, loading arm one end and sliding rail are slidably connected and level is suspended from vertical beam side, and the loading arm is equipped with to be moved along its left and right
Dynamic linear motor, the linear motor output end are equipped with load contact.
A kind of bone tissue-metal implant complex in-situ mechanical test method, includes the following steps,
1) scanning determines the morphosis ginseng of bone tissue and metal implant for installing the bone slot at metal implant human body
Number, external applied load suffered under use state after being implanted into human body by pressure film sensor measurement metal implant；
2) according to the parameter obtained in step 1, bone tissue is made with the bone tissue for being derived from animal, and make metal implant,
Strain-ga(u)ge transducer is installed respectively in bone tissue and metal implant surface, then according to metal implant in the intracorporal method for implantation of people
It is combined into one to form bone tissue-metal implant complex with bone tissue, and strain is installed at the combination interface of the two
Piece sensor；
3) bone tissue-metal implant complex is fixed on to the bone tissue-metal implant complex original position power
Fixing to clamp on fixture in performance testing device is learned, fixture will be fixed to clamp and analog loading device opsition dependent is fixed on test
On platform, the angle of loading arm in analog loading device is adjusted, is allowed to the data measured in the external force load and step 1 of applied force
Unanimously, while by load contact it is adequately exposed to the upper surface of metal implant, then fixes loading arm, start analog loading device
Carry out simulated experiment；
4) by in-situ scanning electron microscope precisely observation bone tissue-metal implant complex in situ by outer load
Microstructure deformation and micromechanism of damage evolution process during lotus, metal implant, bone are acquired by strain-ga(u)ge transducer in real time
Tissue and the combination interface of the two are in the biomechanical property parameter in each region in loading process, and are transported to computer.
The present invention compared with prior art the advantages of:
1, this programme is under the scanning electron microscope equipped with loading device in situ, precisely observation bone tissue-metal in situ
Implant composite samples be compressed axially, stretched, the plus loads such as CYCLIC LOADING process during microstructure deformation
And micromechanism of damage evolution process, meanwhile, by strain-ga(u)ge transducer automatic collection correlation mechanical performance data, such as metal implant material
Material, bone tissue and its interface are loading the biomechanical properties parameters such as intensity, plasticity, elasticity modulus, the Poisson's ratio of different moments,
Establish the trends relation curve of above-mentioned each biomechanical property parameter and time, the life between metal implant and body bone tissue
Material resources Compatibility Evaluation and the stress transmission mechanism disclosed between dissimilar material provide theoretical direction.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram for fixing to clamp fixture that double fastener block clamping structure is used in the present invention；
Fig. 3 is the structural schematic diagram for fixing to clamp fixture that collet clamping structure is used in the present invention；
Fig. 4 is bone tissue-metal implant complex structural schematic diagram in the present invention.
Specific embodiment
1-4 describes the embodiment of the present invention with reference to the accompanying drawing.
Bone tissue-metal implant complex in-situ mechanical test device, as shown in Figure 1, including in-situ scanning electronics
Microscope 1, the in-situ scanning electron microscope 1 are existing equipment, can test according to the present invention need to select properly
The microscope in situ of specification.It is horizontal on the in-situ scanning electron microscope 1 to be equipped with test platform 2,2 upper end of test platform
Face is fixed on one side fixes to clamp fixture 4 for the 5 carry out level clamping of bone tissue-metal implant complex, and the test is flat
2 upper surface another side of platform is equipped with the analog loading device 3 to exert a force to bone tissue-metal implant complex 5, the bone tissue-gold
Belonging to implant complex 5 includes bone tissue 6 and metal implant 7 of the combination in one, as shown in figure 4, the bone tissue 6 and metal are planted
Strain-ga(u)ge transducer 8, the simulation are mounted at the respective outer surface of body 7 and bone tissue 6 and 7 combination interface of metal implant
Loading device 3 simulates the plus load suffered by human body corresponding position of metal implant 7 and is applied to bone tissue-metal implant and answers
On zoarium 5, by the in-situ scanning electron microscope 1 to bone tissue-metal implant complex 5 by plus load process
In microstructure deformation and micromechanism of damage evolution process carry out precisely observation in situ, by the strain-ga(u)ge transducer 8 to bone
The biomechanical property Parameters variation at each position carries out real-time monitoring and adopts at tissue 6, metal implant 7 and the two combination interface
Collection.
The fixture 4 that fixes to clamp can be realized using various structures, in the present embodiment with two different form of
It fixes to clamp and illustrates for fixture 4, structure is simple, easy to use and operate.One is the fixtures 4 that fixes to clamp using collet folder
Locking structure, specifically, as shown in figure 3, the collet clamping structure includes conical chuck body 411, tapered sleeve 412,413 and of clamping sleeve
Support base 414 is fixed with fixing seat on the test platform 2, and the fixing seat side is connected with support base 414, the branch
It supports and is equipped with spring 415 in 414 inner cavity of seat, the 415 side level of spring is equipped with conical chuck body 411, the conical chuck body
411 forward outer surfaces are cone, and the tapered sleeve 412 is placed on outside conical chuck body 411, the 412 inner surface front of tapered sleeve
For the conical inner surface being adapted to the conical external surface of conical chuck body 411, the clamping sleeve 413 is placed on outside tapered sleeve 412
Portion, 413 front end of clamping sleeve are equipped with radially toward annular convex platform that is projecting inward and pushing down 412 front end of tapered sleeve, the compression
It covers 413 inner surface rear portions to screw by helicitic texture and 414 outer surface of support base, the clamping sleeve 413 is in threaded engagement process
In move to left and press that tapered sleeve 412 is mobile, and the tapered sleeve 412 drives conical chuck body 411 by bone tissue-metal plant by cone structure
Composite 5 clamps.Fixture 4 is fixed to clamp described in another kind and uses double fastener block clamping structure, specifically, as shown in Fig. 2, described
Double fastener block clamping structure includes the pedestal 421 being fixed on test platform 2, and described 421 both sides of the upper end of pedestal is equipped with support
Plate 422, screw thread level is combined with screw rod 425 in each support plate 422, and two 425 opposite ends of screw rod are equipped with fixture block
424,421 upper surface of the pedestal middle part is equipped with the slideway 423 for being moved along it fixture block 424；In use, two screw rods of turn
425, relatively move two screw rods 425 respectively along corresponding support plate 422, and push two fixture blocks 424 along slideway 423
Relative movement clamps bone tissue-metal implant complex 5.
3 structure of analog loading device in the present embodiment, as shown in Figure 1, the analog loading device 3 includes being set to vertically
The vertical beam 301 on 2 upper surface one side of test platform is equipped with sliding rail 302,303 one end of loading arm and sliding rail on the vertical beam 301 vertically
302 are slidably connected and level is suspended from 301 side of vertical beam, and the loading arm 303 is equipped with the linear motor moved left and right along it
304,304 output end of linear motor is equipped with load contact 305.In addition to simulating metal using above-mentioned analog loading device 3
Implant 7 outside suffered plus load, can also realize the simulation of plus load in human body using other fatigue loading devices.
A kind of bone tissue-metal implant complex in-situ mechanical test method, includes the following steps,
1) scanning determines the morphosis of bone tissue 6 and metal implant 7 for installing the bone slot at 7 human body of metal implant
Parameter, external applied load suffered under use state after being implanted into human body by pressure film sensor measurement metal implant 7；
2) according to the parameter obtained in step 1, bone tissue 6 is made with the bone tissue for being derived from animal, and make metal implant
7, strain-ga(u)ge transducer 8 is installed respectively in bone tissue 6 and 7 surface of metal implant, then according to metal implant 7 in the intracorporal plant of people
Enter method and be combined into one it to form bone tissue-metal implant complex 5 with bone tissue 6, and at the combination interface of the two
Strain-ga(u)ge transducer 8 is installed；
3) bone tissue-metal implant complex 5 is fixed on to the bone tissue-metal implant complex original position power
Fixing to clamp on fixture 4 in performance testing device is learned, fixture 4 will be fixed to clamp and 3 opsition dependent of analog loading device is fixed on
On test platform 2, the angle of loading arm 303 in analog loading device 3 is adjusted, is allowed in the external force load and step 1 of applied force
The data measured are consistent, while load contact 305 are adequately exposed to the upper surface of metal implant 7, then fix loading arm
303, starting analog loading device 3 carries out simulated experiment；
4) by the precisely observation bone tissue-metal implant complex 5 in situ of in-situ scanning electron microscope 1 by external force
Microstructure deformation and micromechanism of damage evolution process in loading, acquire metal implant by strain-ga(u)ge transducer 8 in real time
7, bone tissue 6 and the combination interface of the two are in the biomechanical property parameter in each region in loading process, and are transported to electricity
Brain.
The present invention can precisely observe bone tissue-gold under the scanning electron microscope equipped with loading device in situ in situ
Belong to 5 sample of implant complex be compressed axially, stretched, the Combined Loadings such as CYCLIC LOADING process during Micromechanics become
Shape and micromechanism of damage evolution process, meanwhile, pass through 8 automatic collection correlation mechanical performance data of strain-ga(u)ge transducer, comprising: metal
Implant material, bone tissue and its interface are in biomechanics such as intensity, plasticity, elasticity modulus, the Poisson's ratios of load different moments
Energy parameter, establishes the trends relation curve of above-mentioned each biomechanical property parameter and time, is metal implant and human body bone group
The stress transmission mechanism between biomechanical compatibility evaluation and announcement dissimilar material between knitting provides theoretical direction.
Above-described embodiment, only presently preferred embodiments of the present invention, is not intended to limit the invention practical range, therefore all with this
The equivalence changes that content described in invention claim is done should all be included within scope of the invention as claimed.
Claims (5)
1. bone tissue-metal implant complex in-situ mechanical test device, it is characterised in that: including in-situ scanning electronic display
Micro mirror (1), horizontal on the in-situ scanning electron microscope (1) to be equipped with test platform (2), test platform (2) upper surface
It is fixed on one side and bone tissue-metal implant complex (5) carry out level clamping is fixed to clamp into fixture (4), the test
Platform (2) upper surface another side is equipped with to bone tissue-metal implant complex (5) force analog loading device (3), the bone
Tissue-metal implant complex (5) include combine one bone tissue (6) and metal implant (7), the bone tissue (6) and
Foil gauge sensing is mounted at the respective outer surface of metal implant (7) and bone tissue (6) and metal implant (7) combination interface
Device (8), the analog loading device (3) simulate metal implant (7) plus load suffered by human body corresponding position and application
In on bone tissue-metal implant complex (5), bone tissue-metal implant is answered by the in-situ scanning electron microscope (1)
The microstructure deformation and micromechanism of damage evolution process of fit (5) during by plus load carry out precisely observation in situ,
By the strain-ga(u)ge transducer (8) to the Biological Strength at each position at bone tissue (6), metal implant (7) and the two combination interface
It learns performance parameter variations and carries out real-time monitoring and acquisition.
2. bone tissue according to claim 1-metal implant complex in-situ mechanical test device, feature exist
In: described fix to clamp fixture (4) are using collet clamping structure, specifically, the collet clamping structure includes conical chuck body
(411), tapered sleeve (412), clamping sleeve (413) and support base (414) are fixed with fixing seat on the test platform (2), described
Fixing seat side is connected with support base (414), is equipped with spring (415) in support base (414) inner cavity, the spring (415)
Side level is equipped with conical chuck body (411), and conical chuck body (411) forward outer surface is cone, the tapered sleeve
(412) it is placed on conical chuck body (411) outside, tapered sleeve (412) the inner surface front is the circular cone with conical chuck body (411)
The conical inner surface of shape outer surface adaptation, the clamping sleeve (413) are placed on outside tapered sleeve (412), before the clamping sleeve (413)
End is equipped with radially toward annular convex platform that is projecting inward and pushing down tapered sleeve (412) front end, clamping sleeve (413) the inner surface rear portion
It is screwed by helicitic texture and support base (414) outer surface, the clamping sleeve (413) moves to left during threaded engagement presses cone
(412) movement is covered, the tapered sleeve (412) is compound by bone tissue-metal implant by cone structure driving conical chuck body (411)
Body (5) clamps.
3. bone tissue according to claim 1-metal implant complex in-situ mechanical test device, feature exist
In: described fix to clamp fixture (4) are using double fastener block clamping structure, specifically, the double fastener block clamping structure includes being fixed on
Pedestal (421) on test platform (2), described pedestal (421) both sides of the upper end are equipped with support plate (422), each support
Screw thread level is combined with screw rod (425) on plate (422), and two screw rod (425) opposite ends are equipped with fixture block (424), described
The slideway (423) for being moved along it fixture block (424) is equipped in the middle part of pedestal (421) upper surface.
4. bone tissue according to claim 1-metal implant complex in-situ mechanical test device, feature exist
In: the analog loading device (3) includes the vertical vertical beam (301) for being set to test platform (2) upper surface one side, the vertical beam
(301) sliding rail (302) are equipped with vertically on, loading arm (303) one end is slidably connected with sliding rail (302) and level is suspended from vertical beam
(301) side, the loading arm (303) are equipped with the linear motor (304) moved left and right along it, the linear motor (304)
Output end is equipped with load contact (305).
5. a kind of bone tissue-metal implant complex in-situ mechanical test method, it is characterised in that: include the following steps,
1) scanning determines the form knot of bone tissue (6) and metal implant (7) for installing the bone slot at metal implant (7) human body
Structure parameter, external applied load suffered under use state after being implanted into human body by pressure film sensor measurement metal implant (7)；
2) according to the parameter obtained in step 1, bone tissue (6) are made with the bone tissue for being derived from animal, and make metal implant
(7), strain-ga(u)ge transducer (8) are installed in bone tissue (6) and metal implant (7) surface respectively, are then existed according to metal implant (7)
The intracorporal method for implantation of people is combined into one it to form bone tissue-metal implant complex (5) with bone tissue (6), and two
Strain-ga(u)ge transducer (8) are installed at the combination interface of person；
3) bone tissue-metal implant complex (5) is fixed on to the bone tissue-metal implant complex in-situ mechanical
Fixing to clamp on fixture (4) in performance testing device, will fix to clamp fixture (4) and analog loading device (3) opsition dependent is solid
It is scheduled on test platform (2), the angle of loading arm (303), is allowed to the external force load of applied force in adjustment analog loading device (3)
It is consistent with the data measured in step 1, while the upper surface that contact (305) are adequately exposed to metal implant (7) will be loaded, then solid
Surely loading arm (303) are lived, starting analog loading device (3) carries out simulated experiment；
4) by in-situ scanning electron microscope (1) precisely observation bone tissue-metal implant complex (5) in situ by external force
Microstructure deformation and micromechanism of damage evolution process in loading, by strain-ga(u)ge transducer (8), acquisition metal is planted in real time
The combination interface of body (7), bone tissue (6) and the two is in the biomechanical property parameter in each region in loading process, and defeated
It is sent to computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810951836.8A CN109187181A (en) | 2018-08-21 | 2018-08-21 | Bone tissue-metal implant complex in-situ mechanical test device and method |
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| CN201810951836.8A CN109187181A (en) | 2018-08-21 | 2018-08-21 | Bone tissue-metal implant complex in-situ mechanical test device and method |
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| CN111855410A (en) * | 2020-08-01 | 2020-10-30 | 江西理工大学 | Elastic modulus calculation and failure characteristic analysis method for tailing filling assembly |
| CN111855410B (en) * | 2020-08-01 | 2022-05-03 | 江西理工大学 | Elastic modulus calculation and failure characteristic analysis method for tailing filling assembly |
| CN113984521A (en) * | 2021-10-25 | 2022-01-28 | 陕西科技大学 | Multifunctional device and method for testing mechanical property of implant-bone |
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