CN108969157A - High bionical intervertebral motion retaining device - Google Patents
High bionical intervertebral motion retaining device Download PDFInfo
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- CN108969157A CN108969157A CN201810843990.3A CN201810843990A CN108969157A CN 108969157 A CN108969157 A CN 108969157A CN 201810843990 A CN201810843990 A CN 201810843990A CN 108969157 A CN108969157 A CN 108969157A
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- bone plate
- plate
- nucleus pulposus
- liner
- friction
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- 238000013519 translation Methods 0.000 claims abstract description 7
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- 230000007704 transition Effects 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 14
- 230000001815 facial effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 6
- 229920002530 polyetherether ketone Polymers 0.000 claims description 6
- 238000002224 dissection Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 229920010741 Ultra High Molecular Weight Polyethylene (UHMWPE) Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 description 8
- 238000001356 surgical procedure Methods 0.000 description 6
- -1 polyethylene Polymers 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011664 nicotinic acid Substances 0.000 description 3
- 230000002980 postoperative effect Effects 0.000 description 3
- 208000003076 Osteolysis Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 208000029791 lytic metastatic bone lesion Diseases 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 235000012149 noodles Nutrition 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000002271 resection Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 241000251539 Vertebrata <Metazoa> Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003592 biomimetic effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
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- 239000013500 performance material Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
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- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30518—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30818—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves castellated or crenellated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurology (AREA)
- Prostheses (AREA)
Abstract
The present invention relates to a kind of high bionical intervertebral motion retaining devices.It is secondary to be embedded in the spherical surface friction being made of liner and nucleus pulposus for the bionical intervertebral motion retaining device of the height, including upper bone plate, lower bone plate between upper bone plate, lower bone plate；It is in clearance fit that spherical surface, which rubs secondary, and the spherical radius value of liner indent spherical crown shape friction rounded channels is greater than nucleus pulposus evagination friction top dome friction ball face；Liner is stationary relative to upper bone plate or realizes rotation or translation, nucleus pulposus is stationary relative to lower bone plate or realizes rotation or translation, and the spherical surface that liner and nucleus pulposus are formed rubs secondary rotation center then moving freely without axial movement or realization front, rear, left and right direction.
Description
Technical field
The present invention relates to the design of the structure of orthopaedic medical treatment articles and applied technical field, in particular to a kind of high bionical intervertebrals
Move retaining device.
Background technique
Intervertebral motion retaining device had at present Bryan, Prestige product line, ProDisc C, Mobi-C,
A few money products such as PCM, SRCURE-C obtain FDA approval, are widely used all over the world, but these products are that some structures are adopted
With approximate Bionic Design, they are new performance materials applications, apply and innovate cup-and-ball joint face compared with multiple degrees of freedom motion mode
The representative of application, external at present there is no high bionic movement retaining device products to obtain FDA approval, and the country is currently without a vertebra
Between movement retaining device obtain CFDA approval, domestic intervertebral motion retaining device is in the patent stage, authorized and in Shen
Patent please is mostly to copy external product construction profile to carry out micromodification to move, and the product for possessing innovation structure design is less.
US7025787B2 discloses a kind of implantable articular prosthesis, and structure includes: upper and lower titanium alloy casing, elastic outer cover
And kernel, the prosthese can be realized bend and stretch, lateral bending, rotation and all around be displaced 5 directions freedom degree, can preferably it is extensive
The movenent performance of multiple operated level, and elastic outer cover can effectively prevent abrasive dust to overflow, soft tissue is prevented to grow into, and inside is forgiven
Lubricant can be effectively reduced friction of motion, be the good product of a application, but the product does not carry out profiling
Structure design needs specially to cut soleplate above and below vertebral bone, polishes moulding to use shell up and down in implantation process
The bulge-structure at top, amount of bone resection is larger, increases many and diverse degree of surgical procedure, increases operating difficulty, and the bone cut off is broken
Bits further may generate adverse effect to surrounding tissue.
CN101999951B discloses a kind of artificial intervertebral disc of cervical vertebra made from memory alloy, by an artificial intervertebral disk body and and its
The support plate composition of suit, artificial intervertebral's disk body have taper, anticreep are distributed on the upper and lower surface of artificial intervertebral's disk body and falls
Thorn, the two sides of upper and lower surface are equipped with fixed branch, and the inside both ends of each fixation branch are respectively equipped with anticreep example tooth.This invention work
Art moulding is simple, easily deformable merging, installs and stablizes after complex.It is easy to use during surgery, it is fixation, reliable, it remains
Cervical vertebrate active degree reduces neighbouring centrum complication, while shortening operating time, simplifies surgical procedure, but the invention is difficult
To realize the rotary motion of normal vertebral body, and cooperate excessively between structure, contact surface is excessive, is difficult that product stress is avoided to concentrate
Phenomenon and fretting wear lead to the problem of more abrasive dust.
It is a highly to adapt to corpus vertebrae dissection shape, operation section in view of this situation of the current technical field
Duan Shuhou movement can effectively reduce surgical operation step close to healthy segmentation movement situation to greatest extent, for doctor, to disease
For trouble can safe and effective and intervertebral motion retaining device with long service life have the urgent market demand.
Summary of the invention
The first problem solved of the invention is to provide a kind of high bionical, friction excellent, movement with secondary polishing machine
Height bionical intervertebral motion retaining device of the range in practical centrum motion range, with innovative structure application.
The Second Problem solved of the invention is to provide a kind of based on to 2000 health Chinese backbone MRI images
Measurement, analysis, research, it is ensured that upper and lower bone plate sagittal facial contour, footmark facial contour can more preferably with corpus vertebrae bone shape phase
It coincide, operation does not need largely to cut off vertebral bone and destroy archecenra bone structure when being implanted into, and reduces the height of operating difficulty
Bionical intervertebral motion retaining device.
The third problem solved of the invention is to provide a kind of friction using nonmetallic-non-metaliic form with secondary knot
Structure, the liner that the excellent polyetheretherketonematerials materials of resistance to Fretting are constituted rub with ultra-high molecular weight polyethylene nucleus pulposus composition spherical surface
Pair is wiped, which has excellent friction and wear behavior, and can effectively avoid traditional product metal and superhigh molecular weight polyethylene
Alkene friction easily forms polyethylene abrasive dust with secondary, and then leads to the latter problems such as osteolysis, implantation material relaxation and prosthese failure
The bionical intervertebral motion retaining device of height.
The 4th solved problem of the invention be to provide it is a kind of friction pair among reserve 0.05~0.2mm between
Gap, it is ensured that form hydrodynamic lubrication layer between the friction pair that liner, nucleus pulposus form, friction and wear failure rate is low, the service life is longer
The bionical intervertebral motion retaining device of height.
The 5th solved problem of the invention is to provide a kind of transition of stress scalene cone structure, which answers maximum
Power distribution layer is transferred on scalene cone, so that contact rubbing surface is no longer that maximum stress concentrates face, avoids traditional product friction secondary
In rubbing surface simultaneously again be loading end, under frictional force, maximum stress double action, lead to contact surface frictional wear amount mistake
Greatly, the nucleus pulposus problem short using birthday noodle effectively extends the bionical intervertebral motion retaining device of height of nucleus pulposus service life.
The 6th solved problem of the invention is to provide a kind of lower bone plate uniqueness and is equipped with the outer of protection uncovertebral joint
Edge chamfers plane or circular arc, can effectively facilitate Bone Ingrowth healing, and can effectively reduce hypocentrum amount of bone resection, maximum in operation
Limit retains vertebral bone, simplifies surgical procedure, reduces the bionical intervertebral motion retaining device of height of operating difficulty.
The 7th solved problem of the invention is to provide a kind of human body that combination healthy population backbone MRI image embodies
Device rotation center is located at 0 below lower bone plate lower surface by actual motion law-analysing research conclusion by structure design
In~8mm, before and after the upper and lower bone plate of product in the 0~2mm of extreme direction to the rear of midpoint, rotation center is fully located at health
Within the scope of crowd's Vertebral rotation center movement, the postoperative movement of operated level can be ensured close to preoperative normal physiological motion to greatest extent
The bionical intervertebral motion retaining device of height.
The technical solution of the invention is as follows the bionical intervertebral motion retaining device of height, including upper bone plate, lower synthetism
Plate is characterized in that, it is secondary that the spherical surface friction being made of liner and nucleus pulposus is embedded between the upper bone plate, lower bone plate；
The secondary spherical surface friction is in clearance fit, and the spherical radius value of the liner indent spherical crown shape friction rounded channels is greater than the nucleus pulposus
Evagination friction top dome friction ball face；Liner is stationary relative to upper bone plate or realizes rotation or translation, and nucleus pulposus is relative under
Bone plate is stationary or realizes rotation or translation, and the spherical surface that liner and nucleus pulposus are formed rubs secondary rotation center then without axial movement
Or it can realize moving freely for front, rear, left and right direction.
As preferred: the upper bone plate is formed the bone plate in turtleback by the liner embedded groove of bottom surface indent, top surface
Plate body, turtleback bone plate plate body on the pawl that is arranged constitute.
As preferred: the cross section of the cross-sectional outling of the upper bone plate turtleback plate body and the lower bone plate plate body
Profile from the bionical intervertebral motion retaining device of the height enters the front end of intervertenral space, and to rear end, successively transition is formed are as follows: trapezoidal+square
Shape+ellipse；The trapezoidal front section is convenient for Using prosthesis interbody space, and can retain vertebral bone rear portion uncovertebral joint to greatest extent
Unciform process structure；The rectangular central portion increases cross sectional area to greatest extent, is conducive to increase product and vertebral bone contact area；
The ellipse tail portion matches with practical vertebral bone front arc.
As preferred: the upper bone plate turtleback sagittal facial contour rear end is equipped with horizontal support surface, the supporting surface position
At the top of the scalene cone horizontal by 2 degree of angles, the turtleback sagittal plane profile front end is arc sagittal plane, the arc
Sagittal plane is integrally located at the remaining part that taper is 2 ° of scalene cones.
As preferred: the arc sagittal plane is composed of two different sphere of contacts of radius value, and point of contact is arc
Face highest point, it is the lesser spherical surface of radius value, rear 2/3 curved portion that the arch section connecting with supporting surface, which accounts for about arc overall length 1/3,
Dividing is the biggish spherical surface of radius, and the sagittal facial contour of turtleback plate body matches with the practical centrum lower plate dissection shape of human body.
As preferred: the liner is made of the recessed spherical crown shape friction rounded channels of liner body, liner body inner face；The liner by
Polyether-ether-ketone (PEEK) material is made.
As preferred: transition of stress scalene cone that the nucleus pulposus is protruded out by nucleus pulposus supporter, along nucleus pulposus supporter undergauge, edge
The molding friction spherical surface of transition of stress scalene cone evagination, transition of stress scalene cone and the evagination friction molding circle in spherical surface engaging portion
Angle/chamfering is constituted；Angle between the transition of stress scalene cone and the nucleus pulposus supporter is within the scope of 50 °~89 °；It is described
The molding friction spherical surface centre of sphere, that is, prosthese rotation center of nucleus pulposus evagination is located at below lower bone plate lower surface in 0~8mm, described
Before and after upper bone plate and the lower bone plate in the 0~2mm of extreme direction to the front of midpoint；The nucleus pulposus is by superhigh molecular weight polyethylene
Alkene (UHMWPE) is made.
As preferred: the lower bone plate is by plate body, the nucleus pulposus embedded groove of plate body top surface indent, plate body lower surface are left and right,
The pawl being arranged on the continuously shaped outer rim scarf of front side wall, plate body lower surface is constituted.
As preferred: the lower bone plate upper and lower surfaces use parallel planar structure, lower bone plate arranged on left and right sides face
The innovation outer rim beveling with bone plate bottom surface angle at 0 °~75 ° that can retain uncovertebral joint is equipped with front end face lower edge
Plane or cambered surface.
As preferred: the upper bone plate pawl, the lower bone plate pawl are right-angle prismatic cone pawl, two right-angle surfaces
Parallel with prosthese rear end respectively or form an angle, parallel with prosthese side, right-angle prismatic bores inclined-plane towards prosthese inside front ends；
The right-angle prismatic is bored fixed pawl and is arranged in upper bone plate upper surface and lower bone plate lower surface in asymmetric, upper bone plate
Pawl layout is in " O " type, and in " O " type or so side, each three pawls of left and right side are in six right-angle prismatic cone symmetrical cloth of pawl
120 °~175 ° obtuse triangle layouts, each pawl is vertical with the section of position point, guarantees that pawl can be inserted vertically
Enter upper centrum lower surface, it is ensured that be initially implanted into effective fixation when prosthese；The lower plate fixation pawl is laid out from front end extremely
Rear end is in " eight " font, and each three right-angle prismatics in left and right bore pawl.
Compared with prior art, beneficial effects of the present invention:
The present invention using height biomimetic features design, based on to 2000 health Chinese backbone MRI images measurement, point
Analysis, research, it is ensured that upper and lower bone plate sagittal facial contour, footmark facial contour can more preferably match with corpus vertebrae bone shape, and
Lower bone plate is even more unique outer rim beveling plane for being equipped with protection uncovertebral joint or circular arc, compares traditional product, the present invention is corresponding
The contact area of device and vertebral bone is bigger, can effectively facilitate Bone Ingrowth healing, and can effectively reduce vertebral bone in operation and cut
Except amount, retain vertebral bone to greatest extent, simplify surgical procedure, reduces operating difficulty.The high Bionic Design of rotation center can effectively be kept away
Exempt from traditional prosthesis rotation center not the human body practical rotation center moving region the problem of, guarantees preoperative, postoperative surgical segment fortune
Dynamic rule consistency.
(2) turtleback sagittal facial contour of the invention matches with the practical centrum lower plate dissection shape of human body, being capable of maximum limit
Degree fitting centrum, needs to carry out vertebral bone to cut moulding operation, simplifies surgical procedure, reduce hand before avoiding traditional product from being implanted into
Art difficulty.The human body actual motion law-analysing research conclusion that present invention combination healthy population backbone MRI image embodies, passes through
Device rotation center is located at below lower bone plate lower surface in 0~8mm by structure design, before and after the upper and lower bone plate of product in
In point position 0~2mm of extreme direction to the rear, rotation center is fully located within the scope of healthy population Vertebral rotation center movement, can be most
Limits ensure the postoperative movement of operated level close to preoperative normal physiological motion.
(3) maximum stress distribution layer is transferred on transition of stress scalene cone by the present invention, so that contact rubbing surface is no longer most
Big stress concentrates face, and avoiding rubbing surface simultaneously is again loading end, under friction, maximum stress double action, contact surface is caused to rub
The problem that abrasion loss is excessive, nucleus pulposus is short using birthday noodle is wiped, nucleus pulposus service life is effectively extended.
(4) the present invention matches auxiliary structure, the excellent polyethers of resistance to Fretting using the friction of nonmetallic-non-metaliic form
Liner and ultra-high molecular weight polyethylene nucleus pulposus the composition spherical surface friction that ether ketone material is constituted are secondary, which has excellent friction
Polishing machine, and can effectively avoid traditional product metal and ultra-high molecular weight polyethylene from rubbing and easily form polyethylene abrasive dust with secondary,
And then lead to the latter problems such as osteolysis, implantation material relaxation and prosthese failure.
(5) face contact or line contact, the corresponding dress of the present invention are directlyed adopt relative to conventional motion retained product spherical surface friction pair
Set the gap that 0.05~0.2mm is reserved among friction pair, it is ensured that form hydrodynamic lubrication between the friction pair that liner, nucleus pulposus form
Layer, reduce the frictional force between friction pair, increase spherical surface friction secondary motion flexibility ratio, is lost compared to traditional product with fretting wear
Low efficiency, the advantage that the service life is longer.
Detailed description of the invention
Fig. 1 is high bionical intervertebral motion retaining device schematic perspective view of the invention；
Fig. 2 is the top view of high bionical intervertebral motion retaining device of the invention；
Fig. 3 is the sagittal plane cross-sectional view of high bionical intervertebral motion retaining device of the invention；
Fig. 4 is the top view of high bionical intervertebral motion retaining device of the invention.
Primary clustering symbol description:
| Upper bone plate 1 | Liner embedded groove 11 | Turtleback bone plate plate body 12 |
| Horizontal support surface 121 | Scalene cone 122 | Arc sagittal plane 123 |
| Minor radius spherical surface 1231 | Large radius spherical surface 1232 | Pawl 124 |
| Trapezoidal 125 | Rectangle 126 | Ellipse 127 |
| Liner 2 | Liner body 21 | Rounded channels 211 |
| Nucleus pulposus 3 | Nucleus pulposus supporter 31 | Transition of stress scalene cone 32 |
| Evagination friction spherical surface 33 | Fillet/chamfering 34 | Lower bone plate 4 |
| Plate body 41 | Trapezoidal 411 | Rectangle 412 |
| Ellipse 413 | Pawl 414 | Outer rim scarf 42 |
| Nucleus pulposus embedded groove 43 |
Specific embodiment
The present invention is further detailed in conjunction with the accompanying drawings below:
It please refers to shown in Fig. 1, Fig. 3, the bionical intervertebral motion retaining device of height, including upper bone plate 1, lower bone plate 4,
It is secondary that the spherical surface friction being made of liner 2 and nucleus pulposus 3 is embedded between the upper bone plate 1, lower bone plate 4；The spherical surface friction is secondary
In clearance fit.
It please refers to shown in Fig. 3, it is in turtleback that the upper bone plate 1 is formed by the liner embedded groove 11 of bottom surface indent, top surface
Bone plate plate body 12, the pawl 124 that is arranged on turtleback bone plate plate body 12 constitutes.
It please refers to shown in Fig. 3, the sagittal plane profile front end of the turtleback bone plate plate body 12 of the upper bone plate 1 is equipped with water
Flat supporting surface 121, the horizontal support surface 121 are located at 122 top of scalene cone horizontal by 2 degree of angles, the turtleback
Sagittal plane profile front end is arc sagittal plane 123, and it is the remaining of 2 ° of scalene cones 122 that the arc sagittal plane 123, which is integrally located at taper,
Lower part.
It please referring to shown in Fig. 3, the arc sagittal plane 123 is composed of two different sphere of contacts of radius value, and
Point of contact is cambered surface highest point, and it is the lesser ball of radius value that the arch section connecting with horizontal support surface 121, which accounts for about arc overall length 1/3,
Face 1231, rear 2/3 arch section are the biggish spherical surface 1232 of radius, the sagittal facial contour and the practical vertebra of human body of turtleback plate body 12
Body lower plate dissection shape matches.
Please refer to shown in Fig. 2, Fig. 4, on the turtleback cross-sectional outling of bone plate turtleback plate body 12 and it is described under
The cross-sectional outling of bone plate plate body 41 from the bionical intervertebral motion retaining device of the height enter the front end of intervertenral space to rear end according to
Secondary transition molding are as follows: trapezoidal 125 (411)+rectangle 126 (412)+ellipse 127 (413)；It is convenient for described trapezoidal 125 (411) front
Using prosthesis interbody space, and the unciform process structure of vertebral bone rear portion uncovertebral joint can be retained to greatest extent；The rectangle 126
(412) middle part increases cross sectional area to greatest extent, is conducive to increase product and vertebral bone contact area；Described oval 127
(413) tail portion matches with practical vertebral bone front arc.
It please refers to shown in Fig. 1, Fig. 3, the liner 2 spherical crown shape friction rounded channels recessed by liner body 21,21 inner face of liner body
211 are constituted；The liner 2 is made of polyether-ether-ketone (PEEK) material.
It please refers to shown in Fig. 1, Fig. 3, the nucleus pulposus 3 is answered by nucleus pulposus supporter 31, along what 31 undergauge of nucleus pulposus supporter protruded out
Power transition scalene cone 32, rub spherical surface 33, transition of stress scalene cone 32 and evagination along the molding evagination of transition of stress scalene cone 32
Molding fillet/the chamfering 34 in 33 engaging portion of spherical surface that rubs is constituted；The nucleus pulposus 3 is made by ultra-high molecular weight polyethylene (UHMWPE)
At.
It please refers to shown in Fig. 1, Fig. 3, the angle between the transition of stress scalene cone 32 and the nucleus pulposus supporter 31 exists
Within the scope of 50 °~89 °；Molding evagination friction 33 centre ofs sphere of the spherical surface, that is, prosthese rotation center of nucleus pulposus is located under lower bone plate 4
In 0~8mm of lower face, in upper bone plate 1 and lower 4 front and back midpoint of bone plate, the 0~2mm of extreme direction to the front
It is interior.
Please refer to shown in Fig. 1, Fig. 3, the lower bone plate 4 by plate body 41,41 top surface indent of plate body nucleus pulposus embedded groove 43,
414 structure of pawl being arranged on 41 lower surface of plate body is left and right, front side wall is continuously shaped outer rim scarf 42,41 lower surface of plate body
At；In other embodiments, 4 upper and lower surfaces of lower bone plate use parallel planar structure, lower 4 arranged on left and right sides of bone plate
Face and front end face lower edge, which are equipped with, can retain the oblique in 0 °~75 ° of innovation outer rim with bone plate bottom surface angle of uncovertebral joint
Section or cambered surface 42.
It please refers to shown in Fig. 1, Fig. 3, the spherical radius value of 2 indent spherical crown shape of the liner friction rounded channels 211 is greater than institute
State nucleus pulposus evagination friction top dome friction ball face 33；Liner 2 is stationary relative to upper bone plate 1 or realizes rotation or translation, marrow
Core 3 is stationary relative to lower bone plate 4 or realizes rotation or translation, in the secondary rotation of spherical surface friction that liner 2 and nucleus pulposus 3 are formed
The heart then without axial movement or realizes moving freely for front, rear, left and right direction.
It please refers to shown in Fig. 2, Fig. 4, the upper bone plate pawl 124, the lower bone plate pawl 414 are right-angle prismatics
Pawl is bored, two right-angle surfaces are parallel with prosthese rear end respectively or form an angle, and parallel with prosthese side, right-angle prismatic bores inclined-plane court
To prosthese inside front ends；The right-angle prismatic bores fixed pawl in upper 1 upper surface of bone plate and lower 4 lower surface of bone plate in non-right
Title formula arrangement, upper 1 pawl of bone plate layout are in " O " type, and six right-angle prismatic cone symmetrical cloth of pawl are on " O " type or so side, a left side
For each three pawls in the right in 120 °~175 ° obtuse triangle layouts, each pawl is vertical with the section of position point, protects
Card pawl can be inserted perpendicularly into centrum lower surface, it is ensured that be initially implanted into effective fixation when prosthese；The lower bone plate 4 is fixed
Pawl layout is in " eight " font from front end to rear end, and each three right-angle prismatics in left and right bore pawl.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the invention as claimed with
Modification, should all belong to the covering scope of the claims in the present invention.
Claims (10)
1. a kind of high bionical intervertebral motion retaining device, including upper bone plate, lower bone plate, which is characterized in that the upper synthetism
It is secondary that the spherical surface friction being made of liner and nucleus pulposus is embedded between plate, lower bone plate；The secondary spherical surface friction is in clearance fit, described
The spherical radius value of liner indent spherical crown shape friction rounded channels is greater than nucleus pulposus evagination friction top dome friction ball face；Liner is opposite
Stationary in upper bone plate or realize rotation or translation, nucleus pulposus is stationary relative to lower bone plate or realizes rotation or flat
It moves, the spherical surface that liner and nucleus pulposus are formed rubs secondary rotation center then without the freedom for moving axially or realizing front, rear, left and right direction
It is mobile.
2. high bionical intervertebral motion retaining device according to claim 1, which is characterized in that the upper bone plate is by bottom surface
Recessed liner embedded groove, top surface molding are in the pawl structure being arranged on the bone plate plate body of turtleback, the bone plate plate body of turtleback
At.
3. high bionical intervertebral motion retaining device according to claim 2, which is characterized in that the upper bone plate turtleback plate
The cross-sectional outling of the cross-sectional outling of body and the lower bone plate plate body enters from the bionical intervertebral motion retaining device of the height
Successively transition forms for the front end of intervertenral space to rear end are as follows: trapezoidal+rectangle+ellipse；The trapezoidal front section is convenient for Using prosthesis centrum
Gap, and the unciform process structure of vertebral bone rear portion uncovertebral joint can be retained to greatest extent；The rectangular central portion increases to greatest extent
Cross sectional area is conducive to increase product and vertebral bone contact area；The ellipse tail portion and practical vertebral bone front arc phase
It coincide.
4. high bionical intervertebral motion retaining device according to claim 3, which is characterized in that the upper bone plate turtleback plate
The sagittal facial contour rear end of body is equipped with horizontal support surface, and the supporting surface is located at the top of the scalene cone horizontal by 2 degree of angles,
The turtleback sagittal plane profile front end is arc sagittal plane, and it is the remaining of 2 ° of scalene cones that the arc sagittal plane, which is integrally located at taper,
Lower part.
5. high bionical intervertebral motion retaining device according to claim 4, which is characterized in that the arc sagittal plane is by two
The different sphere of contact of radius value is composed, and point of contact is cambered surface highest point, and the arch section connecting with supporting surface accounts for about arc
Shape overall length 1/3 is the lesser spherical surface of radius value, and rear 2/3 arch section is the biggish spherical surface of radius, the sagittal plane of turtleback plate body
Profile matches with the practical centrum lower plate dissection shape of human body.
6. high bionical intervertebral motion retaining device according to claim 1, which is characterized in that the liner is by liner body, liner body
The recessed spherical crown shape friction rounded channels of inner face are constituted；The liner is made of polyether-ether-ketone (PEEK) material.
7. high bionical intervertebral motion retaining device according to claim 1, which is characterized in that the nucleus pulposus is supported by nucleus pulposus
Body, the transition of stress scalene cone protruded out along nucleus pulposus supporter undergauge, along the molding friction spherical surface of transition of stress scalene cone evagination, answer
Power transition scalene cone and the evagination friction molding fillet in spherical surface engaging portion/chamfering are constituted；The transition of stress scalene cone with it is described
Angle between nucleus pulposus supporter is within the scope of 50 °~89 °；The molding friction spherical surface centre of sphere of nucleus pulposus evagination, that is, prosthese rotation
Center is located at below lower bone plate lower surface in 0~8mm, and midpoint is inclined before and after the upper bone plate with the lower bone plate
In preceding 0~2mm of extreme direction；The nucleus pulposus is made of ultra-high molecular weight polyethylene (UHMWPE).
8. high bionical intervertebral motion retaining device according to claim 1, which is characterized in that the lower bone plate by plate body,
The nucleus pulposus embedded groove of plate body top surface indent, the outer rim scarf that plate body lower surface is left and right, front side wall is continuously shaped, plate body following table
The pawl being arranged on face is constituted.
9. high bionical intervertebral motion retaining device according to claim 8, which is characterized in that the lower upper and lower table of bone plate
Face uses parallel planar structure, and lower bone plate arranged on left and right sides face and front end face lower edge, which are equipped with, can retain uncovertebral joint
Innovation outer rim with bone plate bottom surface angle at 0 °~75 ° chamfers plane or cambered surface.
10. high bionical intervertebral motion retaining device according to claim 1, which is characterized in that the upper bone plate pawl, institute
Stating lower bone plate pawl is right-angle prismatic cone pawl, and two right-angle surfaces are parallel with prosthese rear end respectively or form an angle, with vacation
Row is held on side level with both hands, and right-angle prismatic bores inclined-plane towards prosthese inside front ends；The right-angle prismatic bores fixed pawl on upper bone plate
Surface and lower bone plate lower surface arrange that upper bone plate pawl layout is in " O " type in asymmetric, and six right-angle prismatics bore pawl
Symmetrical cloth in " O " type or so side, each three pawls of left and right side in 120 °~175 ° obtuse triangles layouts, each pawl with
The section of position point is vertical, guarantees that pawl can be inserted perpendicularly into centrum lower surface, it is ensured that having when being initially implanted into prosthese
Effect is fixed；The lower plate fixation pawl layout is in " eight " font from front end to rear end, and each three right-angle prismatics cone in left and right falls
Tooth.
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| CN201810843990.3A CN108969157B (en) | 2018-07-27 | 2018-07-27 | Highly bionic intervertebral motion retaining device |
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| CN201810843990.3A CN108969157B (en) | 2018-07-27 | 2018-07-27 | Highly bionic intervertebral motion retaining device |
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| CN108969157B CN108969157B (en) | 2021-07-09 |
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Cited By (1)
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|---|---|---|---|---|
| WO2021258546A1 (en) * | 2020-06-24 | 2021-12-30 | 四川大学华西医院 | Assembled cervical vertebra and uncovertebral joint fusion cage |
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| CN108969157B (en) | 2021-07-09 |
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