CN103293057A - Bionics principle-based special clamp for fatigue test of artificial cervical intervertebral disc prosthesis - Google Patents
Bionics principle-based special clamp for fatigue test of artificial cervical intervertebral disc prosthesis Download PDFInfo
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- CN103293057A CN103293057A CN2013102187484A CN201310218748A CN103293057A CN 103293057 A CN103293057 A CN 103293057A CN 2013102187484 A CN2013102187484 A CN 2013102187484A CN 201310218748 A CN201310218748 A CN 201310218748A CN 103293057 A CN103293057 A CN 103293057A
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Abstract
The invention relates to a bionics principle-based special clamp for a fatigue test of an artificial cervical intervertebral disc prosthesis. The bionics principle-based special clamp is characterized by comprising a U-shaped metal sheet for simulating a normal cervical vertebra ligament and a post zygopophysis of a human body and a ceramic filled epoxy resin block body for simulating vertebra, wherein the width of the U-shaped metal sheet is 25-40mm, the lengths of horizontal sections of an upper plate and a lower plate are respectively 40-50mm, the radius of a bending section is 10-14mm; the ceramic filled epoxy resin block body comprises a cuboid with the bottom surface length of 24-30mm, the width of 8-10mm and the height of 8-12mm, and a cylinder with the cross section circle radius of 12-15mm and the height of 8-12mm. The bionics principle-based special clamp can be arranged in a fatigue test machine by being matched with the artificial cervical intervertebral disc prosthesis for carrying out the fatigue test of physiological anteflexion and lateroflexion, and is also capable of simulating physiological characteristics of normal cervical vertebra of the human body during anteflexion and lateroflexion so that a test result accords with the requirement of the biomechanics characteristics of the normal cervical vertebra.
Description
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Technical field
The present invention relates to a kind of fatigue tester of medical apparatus, particularly relate to a kind of unit clamp that is used for disc prosthesis torture test between artificial cervical based on bionics principle.
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Background technology
The cervical intervertebral disk displacement technique is a kind of new technology for the treatment of human cervical spine disease.With respect to traditional cervical spinal fusion, it is advantageous that it both can keep or recover the motion of cervical vertebra, can postpone the generation that the adjacent segment healthy disc is degenerated in the cervical vertebra again.Cervical intervertebral disk prosthesis can bear the cervical intervertebral disk movement load in the physiology scope, and can move the several years in human body and do not produce fault.Therefore, the static state of grasp intervertebral disk prosthesis and dynamic perfromance will become the key of guaranteeing that its product passes through authentication and checks and accepts.
ASTM F2346 provides the test method of definite cervical intervertebral disk prosthesis intensity and dynamic fatigue characteristic, this standard is intended to requirement when carrying out scientific validation and prosthetic designs, pilot system must satisfy the performance requirement that applies axial and torsional load, in order to obtain the test findings of E.B.B..
Cervical intervertebral disk implant test in the past selects for use N/R moistening corpse cervical part of esophagus backbone sample to test usually.Sample keeps the integrality of main ligament and posterior articular process, rejects the appended muscle of cervical vertebra, extracts the intersegmental normal disc of single-unit, then the implantable artificial cervical intervertebral disk prosthesis.The sample two ends make the platform upper and lower side parallel with medical bone cement teeming stage, place to carry out load test on the testing machine.But adopt the cadaver sample test must in 20 hours, finish to prevent the spinoff that causes in the biological disintegration process, be faced with a series of shortcomings such as repeatability is low, expensive simultaneously, therefore needs are satisfied between the artificial cervical that carries out ten million cyclic test the disc prosthesis, the cadaver sample test can't be suitable for.
The Instron-8874 twin shaft of application of known draws turns round hydraulic servo mechanical test machine or other can be used for the fatigue tester of various implants, the test fixture of supporting special use can carry out axial compression to implanting prosthetic, shear a series of torture tests under compressing and compressing-reverse.Not only kind is few but be applicable to the unit clamp of disc prosthesis torture test between artificial cervical at present, and test findings does not meet the biomechanical characterization of normal cervical vertebra.
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Summary of the invention
The objective of the invention is provides a kind of unit clamp that is used for disc prosthesis torture test between artificial cervical based on bionics principle for overcoming the deficiencies in the prior art, the present invention can cooperate between artificial cervical disc prosthesis to insert to carry out on the fatigue tester that physiology is anteflexion, the torture test of lateroflexion, and can simulate well that the normal cervical vertebra of human body is anteflexion, the physiological characteristic during lateroflexion, make test findings meet the requirement of the biomechanical characterization of normal cervical vertebra.
A kind of unit clamp that is used for the torture test of artificial cervical disk based on bionics principle that proposes according to the present invention is characterized in that it is bonded as one with the ceramic filling epoxy resin block of simulating vertebra by the U-shaped sheet metal of the simulation normal cervical vertebra ligament of human body and posterior articular process; The width of this U-shaped sheet metal is that the length of 25 ~ 40mm, upper plate and lower plate horizontal segment respectively is that the radius of 40 ~ 50mm, bending section is 10 ~ 14mm; This pottery filling epoxy resin block is the upper plate rectangular parallelepiped of bottom surface length 24 ~ 30mm, width 8 ~ 10 mm, height 8 ~ 12 mm, and the last plate cylinder body of cross circular section radius 12 ~ 15 mm, height 8 ~ 12 mm, wherein: the upper plate rectangular parallelepiped is bonded in the outside surface of the upper plate of U-shaped sheet metal, and the horizontal range of the last front edge of board of upper plate rectangular parallelepiped center and U-shaped thin plate is 13 ~ 17mm; Last plate cylinder body lower surface is horizontally disposed with, go up the plate cylinder body upper surface is bonded as one with the inside surface that its lower surface is the upper plate of 2 ° ~ 3 ° angles, last plate cylinder body upper surface and U-shaped thin plate, and the inside surface that the right cylinder upper surface is horizontally disposed with on the lower plate, right cylinder lower surface and its upper surface are the lower plate of right cylinder lower surface and U-shaped thin plate on 2 ° ~ 3 ° angles, the lower plate on the lower plate is bonded as one; On last plate cylinder body lower surface and the lower plate right cylinder upper surface respectively and between the artificial cervical of the integrated Ω type structure of outer folder the disc prosthesis upper and lower surface be bonded as one, the disc prosthesis upper and lower surface is 4 ° ~ 5 ° angles between this artificial cervical, and the right cylinder lower surface is parallel in opposite directions on last plate cylinder body upper surface and the lower plate.
The further preferred version of the present invention is: the yield strength of U-shaped sheet metal is that 200 ~ 500 MPa, thickness are 0.5 ~ 1.2mm; Pottery filling epoxy resin block be by the ceramic powder that epoxy resin is filled solidify form, elastic modulus is 10 ~ 30GPa; On last plate cylinder body upper surface, the lower plate under right cylinder lower surface and the lower plate right cylinder bottom center be 15 ~ 20mm apart from the horizontal range of U-shaped sheet metal front end; On last plate cylinder body, the lower plate between the artificial cervical of right cylinder and outer folder the height of disc prosthesis be 20 ~ 28mm.
The principle that the present invention realizes is: according to human cervical spine its specific structure and tissue signature, the restriction that adopts the anthropomorphic normal cervical vertebra ligament of body of U-shaped laminated die and posterior articular process when centrum moves, to have, and adopt ceramic filling epoxy resin block to simulate vertebra, make angle between adjacent ceramic filling epoxy resin block can simulate the physiology curvature of the normal cervical lordosis of human body, two outside surfaces at U-shaped thin plate arrange two ceramic filling epoxy resin blocks that are beneficial to the torture test clamping, have guaranteed the reliability of test findings thus.
The present invention compared with prior art its remarkable advantage is: the one, and the present invention adopts ceramic filling epoxy resin block as the simulation vertebra, rather than vertebra, eliminate the variation that bone characteristic and geometric configuration may cause with this, physiology is anteflexion, the torture test of lateroflexion so that can cooperate between artificial cervical disc prosthesis to insert to carry out on the fatigue tester.The 2nd, the right cylinder upper surface is 4 ° ~ 5 ° angles on the used upward plate cylinder body lower surface of unit clamp of the present invention and the lower plate, can simulate well that the normal cervical vertebra of human body is anteflexion, the physiological characteristic during lateroflexion, make test findings meet the requirement of the biomechanical characterization of normal cervical vertebra.Physiology curvature with the normal cervical lordosis of simulation human body.The 3rd, the U-shaped thin plate that the present invention adopts plays restriction preferably when ceramic filling epoxy resin bulk movement, be conducive to simulate the effectiveness of the normal cervical vertebra ligament of human body and posterior articular process.The 4th, use the method for finite element analysis that the present invention is carried out the finite element analogy analysis.The 5th, Mechanical Builds of the present invention is simple and reliable, low cost of manufacture, simulate effect are good, can satisfy the requirement of the long-term work of carrying out ten million cyclic test.
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Description of drawings
Fig. 1 is the schematic perspective view of structure of the present invention.
Fig. 2 is that the master of structure of the present invention looks synoptic diagram.
Fig. 3 is that synoptic diagram is looked on the left side of structure of the present invention.
Fig. 4 is the schematic perspective view of application state structure of the present invention.
Fig. 5 is that the master of application state structure of the present invention looks synoptic diagram.
Fig. 6 is that synoptic diagram is looked on the left side of application state structure of the present invention.
Fig. 7 is that the present invention is clamped in Instron-8874 fatigue tester view.
Fig. 8 is C5-C6 single-unit section cervical vertebra equivalent stress distribution cloud atlas under the anteflexion condition.
Fig. 9 is the equivalent stress distribution cloud atlas of the present invention under load loads.
Figure 10 is the schematic perspective view of structure of the present invention among the embodiment 6.
Figure 11 is the schematic perspective view of structure of the present invention among the embodiment 7.
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Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1: in conjunction with Fig. 1, Fig. 2 and Fig. 3, the present invention is bonded as one by the U-shaped sheet metal (5) of the simulation normal cervical vertebra ligament of human body and the posterior articular process ceramic filling epoxy resin block with the simulation vertebra, length and width is respectively disc prosthesis (6) is clamped in the unit clamp of the present invention between the artificial cervical of integrated Ω type structure of outside of 14 mm and 16 mm.Wherein: U-shaped sheet metal (5) adopts 6061 line aluminium alloys, and thickness is 1.0mm, and the length of upper plate and lower plate horizontal segment is 40mm for 50mm, width respectively, and the bending section radius is 14mm; Pottery filling epoxy resin block is to fill 80% AlN ceramic powder by epoxy resin to solidify and form; Upper plate rectangular parallelepiped (1) is bonded in the outside surface of the upper plate of U-shaped sheet metal (5), and long and wide 30mm, 10 mm of being respectively in its bottom surface highly are 10mm, and the front end horizontal range of the upper plate of upper plate rectangular parallelepiped (1) center and U-shaped sheet metal (5) is 17mm; Last plate cylinder body (2) lower surface is horizontally disposed with, and last plate cylinder body (2) upper surface and its lower surface are 2 ° of angles, and the inside surface of the upper plate of last plate cylinder body (2) upper surface and U-shaped sheet metal (5) is bonded together; Right cylinder on the lower plate (3) upper surface is horizontally disposed with, and (3) lower surface of right cylinder on the lower plate and its upper surface are 3 ° of angles, and the inside surface of the lower plate of (3) lower surface of right cylinder on the lower plate and U-shaped sheet metal (5) is bonded as one.On last plate cylinder body (2) lower surface and the lower plate right cylinder (3) upper surface respectively and between the artificial cervical of outer folder disc prosthesis (6) upper and lower surface be bonded as one.Disc prosthesis between artificial cervical (6) upper and lower surface is 5 ° of angles, makes on right cylinder (2) upper surface and the lower plate right cylinder (3) lower surface parallel just.On last plate cylinder body (2), the lower plate under right cylinder (3) and the lower plate cross circular section radius of right cylinder (4) be 15 mm.Right cylinder under the lower plate (4) highly is 10 mm.On last plate cylinder body (2) upper surface, the lower plate under right cylinder (3) lower surface and the lower plate right cylinder (4) bottom center be 20mm apart from U-shaped sheet metal (5) front end horizontal range; On last plate cylinder body (2), the lower plate between right cylinder (3) and artificial cervical disc prosthesis (6) overall height be 28mm; Disc prosthesis between artificial cervical (6) lower plate on the lower plate right cylinder (3) upper surface foremost distance be 5mm.
In finite element analysis software, set up at first respectively the implantable artificial cervical intervertebral disk prosthesis following cervical vertebra cervical vertebra sections finite element model and have the finite element model of the unit clamp of the present invention of disc prosthesis between artificial cervical, load anteflexion load and carry out the finite element analogy analysis at following cervical vertebra cervical vertebra sections finite element model then, analyze gained equivalent stress distribution cloud atlas as shown in Figure 8; In the enterprising line displacement restriction of the upper plate rectangular parallelepiped (1) of unit clamp finite element model of the present invention, gained equivalent stress distribution cloud atlas as shown in Figure 9.By Fig. 8 and Fig. 9 as can be known: by regulating the amount of moving down of the Y direction of upper plate rectangular parallelepiped (1) in the unit clamp finite element model of the present invention, the stress level of prosthese can be identical with prosthese stress in the cervical vertebra sections finite element model of cervical vertebra under patient's postoperative, and the maximum stress of U-shaped sheet metal (5) surpasses the yield strength of 6061 line aluminium alloys.
In conjunction with Fig. 7, at first the present invention being clamped in the Instron-8874 twin shaft draws and turns round on the hydraulic servo mechanics fatigue tester, the built-up shaft of this fatigue tester to-reverse the start cylinder to clamp the upper surface that small column props up the upper plate rectangular parallelepiped (1) of unit clamp of the present invention by wedge, right cylinder under the lower plate (4) is moved restriction, set relevant parameters such as loading frequency then and carry out CYCLIC LOADING.The result shows that this fatigue test results is consistent with the tired analog result goodness of fit of higher structure analysis of fatigue software.
In conjunction with Fig. 4, Fig. 5 and Fig. 6, disc prosthesis (6) between the artificial cervical of the integrated Ω type structure of outside is clamped in the unit clamp of the present invention, wherein: U-shaped sheet metal (5) and cylinder dimensions, shape are all identical with Fig. 1, Fig. 2, Fig. 3 synoptic diagram.Difference is: at first will go up on plate cylinder body (2), the lower plate right cylinder (3) respectively and between the artificial cervical of the integrated Ω type structure of outer folder disc prosthesis (0) horizontally rotate 90 ° with respect to embodiment 1, then the present invention is inserted and on upper plate rectangular parallelepiped (1), carry out the load loading on the fatigue tester, carry out the torture test of physiology lateroflexion.
Embodiment 2: the present invention is bonded as one by the ceramic filling epoxy resin block of the U-shaped sheet metal (5) of simulating the normal cervical vertebra ligament of human body and posterior articular process with the simulation vertebra, the integrated Ω type structure artificial cervical intervertebral disk prosthesis (6) that length and width is respectively the outside of 14mm and 16mm is clamped in the unit clamp of the present invention, wherein ceramic filling epoxy resin block is to fill 60% BN ceramic powder by epoxy resin to solidify and form, and all the other each several part specifications, the selection of material all embodiment with embodiment 1 are identical.
Set up finite element model of the present invention, load analysis then.Analyze as can be known, by regulating the amount of moving down of the Y direction of upper plate rectangular parallelepiped (1) in the unit clamp finite element model of the present invention, the stress level of prosthese can be identical with prosthese stress in the cervical vertebra sections finite element model of cervical vertebra under patient's postoperative, and the maximum stress of U-shaped sheet metal (5) surpasses the yield strength of aluminium alloy.The present invention is clamped in carries out torture test on the fatigue tester.The result shows that this fatigue test results is consistent with the tired analog result goodness of fit of higher structure analysis of fatigue software.
Embodiment 3: the present invention is bonded as one by the ceramic filling epoxy resin block of the U-shaped sheet metal (5) of simulating the normal cervical vertebra ligament of human body and posterior articular process with the simulation vertebra, length and width are respectively disc prosthesis (6) is clamped in the unit clamp of the present invention between the artificial cervical of integrated Ω type structure of outside of 14mm and 16mm, wherein: U-shaped thin plate (5) adopts pure titanium sheet metal, and all the other each several part specifications, the selection of material all embodiment with embodiment 1 are identical.
Set up finite element model of the present invention, load analysis then.Analyze as can be known, by regulating the amount of moving down of the Y direction of upper plate rectangular parallelepiped (1) in the unit clamp finite element model of the present invention, the stress level of prosthese can be identical with prosthese stress in the cervical vertebra sections finite element model of cervical vertebra under patient's postoperative, and the maximum stress of U-shaped sheet metal (5) surpasses the yield strength of pure titanium sheet metal.The present invention is clamped in carries out torture test on the fatigue tester.The result shows that this fatigue test results is consistent with the tired analog result goodness of fit of higher structure analysis of fatigue software.
Embodiment 4: the present invention is bonded as one by the ceramic filling epoxy resin block of the U-shaped sheet metal (5) of simulating the normal cervical vertebra ligament of human body and posterior articular process with the simulation vertebra, the integrated Ω type structure artificial cervical intervertebral disk prosthesis (6) that length and width is respectively the outside of 14mm and 16mm is clamped in the unit clamp of the present invention, wherein: U-shaped sheet metal (5) adopts 6061 line aluminium alloys, thickness is 0.5mm, and all the other each several part specifications, the selection of material all embodiment with embodiment 1 are identical.
Set up finite element model of the present invention, load analysis then.Analyze as can be known, by regulating the amount of moving down of the Y direction of upper plate rectangular parallelepiped (1) in the unit clamp finite element model of the present invention, the stress level of prosthese can be identical with prosthese stress in the cervical vertebra sections finite element model of cervical vertebra under patient's postoperative, and the maximum stress of U-shaped sheet metal (5) surpasses the yield strength of aluminium alloy.The present invention is clamped in carries out torture test on the fatigue tester.The result shows that this fatigue test results is consistent with the tired analog result goodness of fit of higher structure analysis of fatigue software.
Embodiment 5: be to be bonded as one by the U-shaped sheet metal (5) of the simulation normal cervical vertebra ligament of human body and posterior articular process and the ceramic filling epoxy resin block of simulation vertebra, length and width are respectively disc prosthesis (6) is clamped in the unit clamp of the present invention between the artificial cervical of integrated Ω type structure of outside of 10 mm and 12 mm, wherein: U-shaped thin plate (5) adopts 6061 line aluminium alloys, thickness is 1.0mm, upper plate and lower plate horizontal section length respectively are 40mm, width is 30mm, and the bending section radius is 10mm; Long and wide 24mm, the 8mm of being respectively in upper plate rectangular parallelepiped (1) bottom surface highly is 8mm, and the front end horizontal range of the upper plate of rectangular parallelepiped (1) center and U-shaped sheet metal (5) is 13mm; Right cylinder (3) upper surface is 4 ° of angles on last plate cylinder body (2) lower surface and the lower plate.On last plate cylinder body (2), the lower plate under right cylinder (3) and the lower plate cross circular section radius of right cylinder (4) be 12 mm.Right cylinder under the lower plate (4) highly is 8 mm.On last plate cylinder body (2) upper surface, the lower plate under right cylinder (3) lower surface and the lower plate right cylinder (4) bottom center be 15mm apart from U-shaped thin plate (5) front end horizontal range; On last plate cylinder body (2), the lower plate between right cylinder (3) and artificial cervical disc prosthesis (6) overall height be 20mm; Between artificial cervical the disc prosthesis lower plate on the lower plate right cylinder (3) upper surface foremost distance be 3mm.
Set up finite element model of the present invention, load analysis then.Analyze as can be known, by regulating the amount of moving down of the Y direction of upper plate rectangular parallelepiped (1) in the unit clamp finite element model of the present invention, the stress level of prosthese can be identical with prosthese stress in the cervical vertebra sections finite element model of cervical vertebra under the postoperative, and the maximum stress of U-shaped sheet metal (5) surpasses the yield strength of aluminium alloy.The present invention is clamped in carries out torture test on the fatigue tester.The result shows that this fatigue test results is consistent with the tired analog result goodness of fit of higher structure analysis of fatigue software.
Embodiment 6: by regulating specification and the selection of material of unit clamp of the present invention, disc prosthesis and anchor clamps of the present invention between existing artificial cervical commonly used are assembled, be clamped in and also can carry out on the fatigue tester that physiology is anteflexion, the torture test of lateroflexion.
In conjunction with Figure 10, choose the specification of suitable test fixture of the present invention: U-shaped sheet metal (5) adopts 6061 line aluminium alloys, and thickness is 1.0mm, and the length of upper plate and lower plate horizontal segment is 40mm for 50mm, width respectively, and the bending section radius is 14mm; Pottery filling epoxy resin block is to fill 80% AlN ceramic powder by epoxy resin to solidify and form; Upper plate rectangular parallelepiped (1) is bonded in the outside surface of the upper plate of U-shaped sheet metal (5), and long and wide 30mm, 10 mm of being respectively in its bottom surface highly are 10mm, and the front end horizontal range of the upper plate of upper plate rectangular parallelepiped (1) center and U-shaped sheet metal (5) is 17mm; Right cylinder under the lower plate (4) cross circular section radius is 15 mm, highly is 10 mm, and bottom center is 20mm apart from U-shaped sheet metal (5) front end horizontal range.
The Prestige prosthese of metal-metal frictional interface design is inserted prosthese (6) position, choose size and the position of right cylinder (3) on suitable last plate cylinder body (2) and the lower plate according to the Prestige prosthese.With screw the Prestige prosthese is fixed, be clamped on the fatigue tester and can carry out the anteflexion torture test of physiology.
Embodiment 7: in conjunction with Figure 11, choose specification and the selection of material of suitable test fixture of the present invention: U-shaped sheet metal (5) adopts 6061 line aluminium alloys, thickness is 1.0mm, and the length of upper plate and lower plate horizontal segment is 40mm for 50mm, width respectively, and the bending section radius is 14mm; Pottery filling epoxy resin block is to fill 80% AlN ceramic powder by epoxy resin to solidify and form; Upper plate rectangular parallelepiped (1) is bonded in the outside surface of the upper plate of U-shaped sheet metal (5), and long and wide 30mm, 10 mm of being respectively in its bottom surface highly are 10mm, and the front end horizontal range of the upper plate of upper plate rectangular parallelepiped (1) center and U-shaped sheet metal (5) is 17mm; Right cylinder under the lower plate (4) cross circular section radius is 15 mm, highly is 10 mm, and bottom center is 20mm apart from U-shaped sheet metal (5) front end horizontal range.
The Mobi-C prosthese of metal-metal frictional interface design is inserted prosthese (6) position, chooses specification and the position of right cylinder (3) on suitable last plate cylinder body (2) and the lower plate according to the Mobi-C prosthese.With screw the Mobi-C prosthese is fixed, be clamped on the fatigue tester and can carry out the anteflexion torture test of physiology.
The present invention has obtained satisfied effect through validation trial.
Claims (5)
1. based on the unit clamp that is used for the torture test of artificial cervical disk of bionics principle, it is characterized in that it is bonded as one with the ceramic filling epoxy resin block of simulating vertebra by the U-shaped sheet metal (5) of the simulation normal cervical vertebra ligament of human body and posterior articular process; The width of this U-shaped sheet metal (5) is that the length of 25 ~ 40mm, upper plate and lower plate horizontal segment respectively is that the radius of 40 ~ 50mm, bending section is 10 ~ 14mm; This pottery filling epoxy resin block is the upper plate rectangular parallelepiped (1) of bottom surface length 24 ~ 30mm, width 8 ~ 10 mm, height 8 ~ 12 mm, and the last plate cylinder body (2) of cross circular section radius 12 ~ 15 mm, height 8 ~ 12 mm, wherein: upper plate rectangular parallelepiped (1) is bonded in the outside surface of the upper plate of U-shaped sheet metal (5), and the horizontal range of the last front edge of board of upper plate rectangular parallelepiped (1) center and U-shaped thin plate (5) is 13 ~ 17mm; Last plate cylinder body (2) lower surface is horizontally disposed with, go up plate cylinder body (2) upper surface is bonded as one with the inside surface that its lower surface is the upper plate of 2 ° ~ 3 ° angles, last plate cylinder body (2) upper surface and U-shaped thin plate (5), and the inside surface that right cylinder on the lower plate (3) upper surface is horizontally disposed with, right cylinder (3) lower surface and its upper surface are the lower plate of right cylinder (3) lower surface and U-shaped thin plate (5) on 2 ° ~ 3 ° angles, the lower plate on the lower plate is bonded as one; On last plate cylinder body (2) lower surface and the lower plate right cylinder (3) upper surface respectively and between the artificial cervical of the integrated Ω type structure of outer folder disc prosthesis (6) upper and lower surface be bonded as one, disc prosthesis between this artificial cervical (6) upper and lower surface is 4 ° ~ 5 ° angles, and right cylinder (3) lower surface is parallel in opposite directions on last plate cylinder body (2) upper surface and the lower plate.
2. unit clamp according to claim 1, the yield strength that it is characterized in that U-shaped sheet metal (5) is that 200 ~ 500 MPa, thickness are 0.5 ~ 1.2mm.
3. unit clamp according to claim 1 and 2 is characterized in that ceramic filling epoxy resin block is to be solidified by the ceramic powder that epoxy resin is filled to form, and its elastic modulus is 10 ~ 30GPa.
4. unit clamp according to claim 1 is characterized in that right cylinder (4) bottom center under right cylinder (3) lower surface on plate cylinder body (2) upper surface, the lower plate and the lower plate is 15 ~ 20mm apart from the horizontal range of U-shaped sheet metal (5) front end.
5. according to claim 1 or 4 described unit clamps, it is characterized in that the height of disc prosthesis (6) between the artificial cervical of right cylinder (3) and outer folder on plate cylinder body (2), the lower plate is 20 ~ 28mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310218748.4A CN103293057B (en) | 2013-06-04 | 2013-06-04 | Based on the unit clamp for the torture test of cervical artificial disc prosthese of bionics principle |
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| CN201310218748.4A CN103293057B (en) | 2013-06-04 | 2013-06-04 | Based on the unit clamp for the torture test of cervical artificial disc prosthese of bionics principle |
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| CN104546230A (en) * | 2015-01-19 | 2015-04-29 | 南京航空航天大学 | Artificial cervical intervertebral disc based on bending section with reversed U-shaped structure having like-trapezoidal section |
| CN104546229A (en) * | 2015-01-19 | 2015-04-29 | 南京航空航天大学 | Artificial cervical intervertebral disc with ultrahigh activity type chamfering U-shaped structure |
| CN104546230B (en) * | 2015-01-19 | 2017-02-01 | 南京航空航天大学 | Artificial cervical intervertebral disc based on bending section with reversed U-shaped structure having like-trapezoidal section |
| CN106769534A (en) * | 2016-12-29 | 2017-05-31 | 清华大学苏州汽车研究院（相城） | A kind of crash tests dummy neck static flexural test device |
| CN112945711A (en) * | 2021-01-22 | 2021-06-11 | 吉林大学 | Special fixture for multi-angle tensile test of sheet butt welding seam |
| CN112945711B (en) * | 2021-01-22 | 2023-03-28 | 吉林大学 | Special fixture for multi-angle tensile test of sheet butt welding seam |
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| CN103293057B (en) | 2015-10-28 |
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