CN105877878A - Low-displacement artificial intervertebral disc - Google Patents

Low-displacement artificial intervertebral disc Download PDF

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Publication number
CN105877878A
CN105877878A CN201610336177.8A CN201610336177A CN105877878A CN 105877878 A CN105877878 A CN 105877878A CN 201610336177 A CN201610336177 A CN 201610336177A CN 105877878 A CN105877878 A CN 105877878A
Authority
CN
China
Prior art keywords
soleplate
flexible gasket
artificial intervertebral
intervertebral disk
end plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610336177.8A
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Chinese (zh)
Other versions
CN105877878B (en
Inventor
张卫平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing AK Medical Co Ltd
Original Assignee
Beijing AK Medical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing AK Medical Co Ltd filed Critical Beijing AK Medical Co Ltd
Priority to CN201610336177.8A priority Critical patent/CN105877878B/en
Publication of CN105877878A publication Critical patent/CN105877878A/en
Application granted granted Critical
Publication of CN105877878B publication Critical patent/CN105877878B/en
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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
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0008—Fixation appliances for connecting prostheses to the body
    • 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
    • A61F2240/00—Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2240/001—Designing or manufacturing processes
    • A61F2240/005—Templates
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0003—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having an inflatable pocket filled with fluid, e.g. liquid or gas

Abstract

The invention discloses a low-displacement artificial intervertebral disc which comprises an upper end plate and a lower end plate. Friction pairs are arranged between the upper end plate and the lower end plate, a flexible pad is arranged between friction pairs and is fixed onto the lower end plate, the upper end plate is supported by the flexible pad, and the flexible pad can rotate relatively along with the upper end plate and the lower end plate, can adaptively deform and keeps in surface contact with contact portions of the upper end plate. The low-displacement artificial intervertebral disc has the advantages that the flexible pad is made of ultrahigh-molecular-weight polyethylene, friction surfaces can deform under the effects of pressures to adapt to the upper end plate and cling to the upper end plate, and accordingly linear displacement between an upper vertebra and a lower vertebra can be prevented.

Description

Low displacement artificial intervertebral disk
Technical field
The present invention relates to a kind of low displacement artificial intervertebral disk, be specifically related to apply the flexible gasket in the artificial intervertebral disk of human spine position.
Background technology
Normally used artificial intervertebral disk, as shown in Figure 1 and Figure 2, sets up a spherical friction pair between upper and lower two soleplates, in order to for retaining certain swing and rotary moveable degree between upper and lower two vertebral bodys.This spherical friction pair is made up of a convex spherical and a concave spherical surface, rotates in the range of certain angle around sphere centre between upper and lower two vertebral bodys when producing oscillating motion.
But also can produce a certain degree of linear displacement between the most upper and lower two vertebral bodys, excessive linear displacement can cause Minor articulus clamping stagnation on rear side of vertebra, user is caused movable impact, reduces the motility of spinal column.
Summary of the invention
For problems of the prior art, it is an object of the invention to provide a kind of low displacement artificial intervertebral disk, between the friction pair of upper and lower two soleplates, flexible gasket is set, flexible gasket uses ultrahigh molecular weight polyethylene to become, rubbing surface can be deformed the upper soleplate that adapts to and fit under pressure, thus avoids producing between upper and lower two vertebral bodys linear displacement.
To achieve these goals, the present invention is by the following technical solutions:
Low displacement artificial intervertebral disk, including upper soleplate and lower soleplate, it is provided with friction pair between upper soleplate and lower soleplate, it is provided with flexible gasket between described friction pair, flexible gasket is fixed on lower soleplate, and flexible gasket supports upper soleplate, along with rotating against of upper soleplate and lower soleplate, described flexible gasket produces adaptability deformation, and keeping with the contact site of upper soleplate is that face contacts.
Further, described upper soleplate includes base, and this base bottom is provided with spherical cooperating head；Described lower soleplate includes base, and this base top is provided with mating groove, and described flexible gasket is arranged in described mating groove, supports described cooperating head.
Further, described flexible gasket is ducted body, and inner chamber is full of filling liquid.
Further, described flexible gasket uses ultrahigh molecular weight polyethylene to become, and described filling liquid uses normal saline or purified water.
Further, described flexible gasket is provided with fabric reinforcement.
Further, described flexible gasket includes housing and capping, and capping is provided with hand-hole and steam vent, seals described hand-hole and steam vent after inner chamber injects filling liquid.
Further, use bonding agent involutory bonding described capping and housing, or use ultrasonic bonding that two parts docking is formed airtight internal cavities.
Further, the base of described upper soleplate and lower soleplate arranges connecting hole, is separately fixed on upper vertebral body and hypocentrum by screw.
The low displacement artificial intervertebral disk using said structure to arrange has the advantage that
Along with rotating against of upper soleplate and lower soleplate, pad sector-meeting produces adaptability deformation, keeping with the contact site of upper soleplate is that face contacts, and thus avoids producing between upper and lower two soleplates linear displacement, avoids generation linear displacement between upper and lower two vertebral bodys simultaneously.
Due to very slight to the abrasion of flexible gasket self, the present invention extends the service life of artificial intervertebral disk, it is possible to reduce patient's post-operative number of times, alleviates the misery of patient, and saves medical expense for patient.
Although flexible gasket is hollow, due to the incompressible characteristic of liquid, so the deformable upper surface of ultra-high molecular weight polyethylene articular surface pad still can obtain enough support forces by liquid in cavity.
Owing to have employed flexible gasket, there is cushioning effect, it is possible to alleviate the differences of Physiological of artificial intervertebral disk and human body, improve the adaptability to prosthese.
Accompanying drawing explanation
Fig. 1 is the structural representation (being arranged between vertebra) of artificial intervertebral disk in prior art；
Fig. 2 is the structural representation (being arranged between vertebra) of artificial intervertebral disk in prior art；
Fig. 3 is the structural representation (being arranged between vertebra) of flexibility artificial intervertebral disk of the present invention；
Fig. 4 is the structural representation (being arranged between vertebra) of flexibility artificial intervertebral disk of the present invention；
Fig. 5 is the exploded view of the present invention；
Fig. 6 is the exploded view of the present invention；
Fig. 7 is used the axonometric chart of lower soleplate by the present invention；
Fig. 8 is used the front view of lower soleplate by the present invention；
Fig. 9 is the axonometric chart of the used flexible gasket of the present invention；
Figure 10 is the sectional view of the used flexible gasket of the present invention；
Figure 11 is used the axonometric chart of upper soleplate by the present invention；
Figure 12 is used the front view of upper soleplate by the present invention；
Figure 13 is the three-dimensional exploded view of the present invention；
Figure 14 is the three-dimensional exploded view of the present invention；
Figure 15 is the schematic diagram of fabrication technology of the used flexible gasket of the present invention；
Figure 16 is the schematic diagram of fabrication technology of the used flexible gasket of the present invention；
Figure 17 is the schematic diagram of fabrication technology of the used flexible gasket of the present invention；
Figure 18 is the structural representation (being installed by screw) of flexibility artificial intervertebral disk of the present invention；
Figure 19 is the three-dimensional exploded view (being installed by screw) of the present invention.
In figure: 1. go up vertebral body；2. hypocentrum；3. go up soleplate；4. descend soleplate；5. go up soleplate；5-1. base；5-2. cooperating head；6. descend soleplate；6-1. base；6-2. mating groove；7. flexible gasket；7-1. fabric reinforcement；7-2. Capping；7-3. hand-hole；7-4. steam vent；8. filling liquid；9. screw.
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined technique purpose, below in conjunction with accompanying drawing and preferred embodiment, structure, feature and effect of the present invention is described in detail as follows.
Embodiment 1
Such as Fig. 3, Fig. 4, Fig. 5, Fig. 6 show one embodiment of the present of invention, low displacement artificial intervertebral disk in this embodiment, including upper soleplate 5 and lower soleplate 6, it is provided with friction pair between upper soleplate 5 and lower soleplate 6, flexible gasket 7 it is provided with between friction pair, flexible gasket 7 is fixed on lower soleplate 6, flexible gasket 7 supports upper soleplate 5, along with rotating against of upper soleplate 5 and lower soleplate 6, flexible gasket 7 produces adaptability deformation, keeping with the contact site of upper soleplate 5 is that face contacts, thus avoid producing between upper and lower two soleplates linear displacement, avoid generation linear displacement between upper and lower two vertebral bodys simultaneously.
As shown in Figure 13, Figure 14, upper soleplate 5 includes base 5-1, and this base 5-1 bottom is provided with spherical cooperating head 5-2；Lower soleplate 6 includes base 6-1, and this base 6-1 top is provided with mating groove 6-2, and flexible gasket 7 is arranged in mating groove 6-2, supports cooperating head 5-2.The combination of mating groove 6-2 and cooperating head 5-2 can further function as restriction above soleplate 5 and lower soleplate 6 and the effect of linear displacement occurs.
Flexible gasket 7 is ducted body, and inner chamber is full of filling liquid 8.
Flexible gasket 7 uses ultrahigh molecular weight polyethylene to become, and filling liquid 8 uses normal saline or purified water, even if so occurring leakage also will not cause damage health.
Flexible gasket 7 includes housing and capping 7-2, and capping 7-2 is provided with hand-hole 7-3 and steam vent 7-4, seals hand-hole 7-3 and steam vent 7-4 with sealing agent after inner chamber injects filling liquid.Concrete structure refers to shown in Figure 16, Figure 17.
7-2 will be covered and housing will use bonding agent involutory bonding, or use ultrasonic bonding that two parts docking is formed airtight internal cavities.
For fixing flexible pad 7, the base of upper soleplate 5 and lower soleplate 6 arranges connecting hole, as shown in Figure 18, Figure 19, be separately fixed on upper vertebral body 1 and hypocentrum 2 by screw 9.
Embodiment 2
As Figure 16, Figure 17 show the embodiment of the present invention 2, in the present embodiment, flexible gasket 7 is provided with fabric reinforcement 7-1.By arranging fabric reinforcement 7-1, improve the intensity of flexible gasket 7, effectively prevent cavity to be extruded and rupture.
Being the manufacturing process of flexible gasket 7 as shown in figure 15, make respectively especially by mould pressing method, ultra-high molecular weight polyethylene articular surface pad is fabricated to capping and hollow form housing, and reserved two apertures in capping are in case injecting liquid and discharging survival gas.Use bonding agent involutory bonding capping and housing or use the methods such as ultrasonic bonding firmly to be docked by two parts and form airtight internal cavities, being injected from an aperture by the liquid such as normal saline or purified water with syringe, inner chamber trapped vapour cognition is discharged from another aperture；Two apertures are sealed after filling by liquid with sealing agent.
Described above simply to illustrate that the present invention, it is understood that to the invention is not limited in above example, meet the various variants of inventive concept all within protection scope of the present invention.

Claims (8)

1. low displacement artificial intervertebral disk, including upper soleplate and lower soleplate, it is provided with friction pair between upper soleplate and lower soleplate, it is characterized in that, be provided with flexible gasket between described friction pair, flexible gasket is fixed on lower soleplate, flexible gasket supports upper soleplate, along with rotating against of upper soleplate and lower soleplate, described flexible gasket produces adaptability deformation, and keeping with the contact site of upper soleplate is that face contacts.
2. low displacement artificial intervertebral disk as claimed in claim 1, it is characterised in that described upper soleplate includes base, and this base bottom is provided with spherical cooperating head；Described lower soleplate includes base, and this base top is provided with mating groove, and described flexible gasket is arranged in described mating groove, supports described cooperating head.
3. low displacement artificial intervertebral disk as claimed in claim 1, it is characterised in that described flexible gasket is ducted body, and inner chamber is full of filling liquid.
4. low displacement artificial intervertebral disk as claimed in claim 3, it is characterised in that described flexible gasket uses ultrahigh molecular weight polyethylene to become, and described filling liquid uses normal saline or purified water.
5. low displacement artificial intervertebral disk as claimed in claim 3, it is characterised in that be provided with fabric reinforcement in described flexible gasket.
6. low displacement artificial intervertebral disk as claimed in claim 3, it is characterised in that described flexible gasket includes housing and capping, and capping is provided with hand-hole and steam vent, seals described hand-hole and steam vent after inner chamber injects filling liquid.
7. low displacement artificial intervertebral disk as claimed in claim 6, it is characterised in that use bonding agent involutory bonding described capping and housing, or use ultrasonic bonding that two parts docking is formed airtight internal cavities.
8. low displacement artificial intervertebral disk as claimed in claim 2, it is characterised in that on the base of described upper soleplate and lower soleplate, connecting hole is set, is separately fixed on upper vertebral body and hypocentrum by screw.
CN201610336177.8A 2016-05-20 2016-05-20 Low displacement artificial intervertebral disk Active CN105877878B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610336177.8A CN105877878B (en) 2016-05-20 2016-05-20 Low displacement artificial intervertebral disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610336177.8A CN105877878B (en) 2016-05-20 2016-05-20 Low displacement artificial intervertebral disk

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CN105877878A true CN105877878A (en) 2016-08-24
CN105877878B CN105877878B (en) 2018-10-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111419485A (en) * 2018-07-27 2020-07-17 深圳清华大学研究院 Intervertebral motion retaining device and positioning type implantation instrument and implantation method thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867728A (en) * 1971-12-30 1975-02-25 Cutter Lab Prosthesis for spinal repair
US4911718A (en) * 1988-06-10 1990-03-27 University Of Medicine & Dentistry Of N.J. Functional and biocompatible intervertebral disc spacer
US4932969A (en) * 1987-01-08 1990-06-12 Sulzer Brothers Limited Joint endoprosthesis
US5002576A (en) * 1988-06-06 1991-03-26 Mecron Medizinische Produkte Gmbh Intervertebral disk endoprosthesis
WO1994002086A1 (en) * 1992-07-16 1994-02-03 Henri Simon Implant for partial or total replacement of preferably cartilagenous or osseous organs
CN1703177A (en) * 2002-08-15 2005-11-30 新特斯(美国)公司 Intervertebral disc implant
US20060235523A1 (en) * 2005-04-19 2006-10-19 Sdgi Holdings, Inc. Implant having a sheath with a motion-limiting attribute
CN101902991A (en) * 2007-10-19 2010-12-01 新特斯有限责任公司 Hemi-prosthesis
CN101969888A (en) * 2008-01-16 2011-02-09 华沙整形外科股份有限公司 Joint replacement device
CN205814483U (en) * 2016-05-20 2016-12-21 北京爱康宜诚医疗器材有限公司 Low displacement artificial intervertebral disk

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867728A (en) * 1971-12-30 1975-02-25 Cutter Lab Prosthesis for spinal repair
US4932969A (en) * 1987-01-08 1990-06-12 Sulzer Brothers Limited Joint endoprosthesis
US5002576A (en) * 1988-06-06 1991-03-26 Mecron Medizinische Produkte Gmbh Intervertebral disk endoprosthesis
US4911718A (en) * 1988-06-10 1990-03-27 University Of Medicine & Dentistry Of N.J. Functional and biocompatible intervertebral disc spacer
WO1994002086A1 (en) * 1992-07-16 1994-02-03 Henri Simon Implant for partial or total replacement of preferably cartilagenous or osseous organs
CN1703177A (en) * 2002-08-15 2005-11-30 新特斯(美国)公司 Intervertebral disc implant
US20060235523A1 (en) * 2005-04-19 2006-10-19 Sdgi Holdings, Inc. Implant having a sheath with a motion-limiting attribute
CN101902991A (en) * 2007-10-19 2010-12-01 新特斯有限责任公司 Hemi-prosthesis
CN101969888A (en) * 2008-01-16 2011-02-09 华沙整形外科股份有限公司 Joint replacement device
CN205814483U (en) * 2016-05-20 2016-12-21 北京爱康宜诚医疗器材有限公司 Low displacement artificial intervertebral disk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111419485A (en) * 2018-07-27 2020-07-17 深圳清华大学研究院 Intervertebral motion retaining device and positioning type implantation instrument and implantation method thereof

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