Cervical artificial disc tabulare gap filling device and artificial disc after arthroplastyTechnical field
The present invention relates to the field of medical instrument technology more particularly to cervical artificial disc tabulare gap filling device and manuallyIntervertebral disk prosthesis.
Background technique
Intervertebral disc of cervical vertebra degenerative disease (cervical disc degeneration disease, CDDD) is disease incidenceHigh common disease, previous therapeutic modality are mainly fusion (anterior cervical discectomy andfusion,ACDF).But ACDF can cause the acceleration regression of neighbouring section due to the increase of neighbouring section compensatory mobility, i.e.,So-called neighbour's vertebra is sick (adjacent segment disease, ASD).Cervical artificial disc replacement (cervical as a result,Disc replacement, CDR) it comes into being.While solving patients' neural's symptom, CDR can also retain original segmentPhysiological activity degree.
The design of cervical artificial disc is varied, but its primary structure is almost the same, comprising: 1. metal endplates:It is the structure of prosthese and centrum sclerotin joint and fixation, detent projection is generally all had, to increase its primary stability；
2. articuli intervertebrales: being the position that architectural difference is bigger between different prostheses, have plenty of high molecular polythene liner(such as Mobi-C) has plenty of metal ball-and-socket joint (such as Prestige-LP), but its purpose is provided to simulate normal intervertebral workEmotionally condition.
For the patient of part, by the polishing and trimming in art, the bone of an available relative level is wholeBoard interface, so that when squeezing into prosthese the metal endplate of prosthese can sufficiently be bonded with the bone interface (tabulare interface) of centrumWithout interspacing.And another part patient, the bone interface of centrum inherently have certain radian, form fornix shape.Though increasing which increases surgical technic difficulty and to a certain extent at this point, the degree of polishing and trimming can be increasedThe incidence fractured in intraoperative blood loss and art；And the bone end plate interface of trimming is often difficult to reach real level,After squeezing into prosthese at this time, often there are gaps at tabulare interface, to increase, postoperative prosthetic loosening, sedimentation etc. occur concurrentThe incidence of disease.
From tabulare interface, artificial disc be can be roughly divided into two types: 1. horizontal soleplate: the metal of such prosthese is wholePlate be it is fully horizontal, without any radian, such as Prestige-LP；2. arc soleplate: the metal endplate of such prosthese hasCertain radian, according to different prosthesis types, radian also respectively has feature.In order to keep the tabulare interface of each patient all completeU.S. fitting, should select most suitable prosthesis type according to the bone soleplate situation of different patients, but this is in the medical treatment of single centreIt is difficult in work；And current prosthesis type is also impossible to meet the bone soleplate situation of all patients.
As described above, the metal endplate of all people's break disk is all fixed design on the market at present, it is unable to satisfy allThe bone soleplate situation of patient.Even if can be to be also impossible to use the artificial vacation of all brands simultaneously in single medical centreBody.
Summary of the invention
The present invention is intended to provide cervical artificial disc tabulare gap filling device and artificial disc after arthroplasty, can pass through adjustingTo adapt to various soleplate arched roof radians.
In order to achieve the above objectives, The technical solution adopted by the invention is as follows:
Cervical artificial disc tabulare gap filling device, including air bag and soleplate, the air bag is set to below soleplate, describedSoleplate is divided into several independent plates, and plate is attached to gasbag outer surface, and air bag is equipped with inlet, in inlet and air bagPortion communicates.
Further, plate lower surface is Nian Jie with gasbag outer surface.
Preferably, plate material is metal.
Preferably, air bag is high molecular material.
Further, there is detent projection in plate upper surface.
Further, there is hydroxyapatite coating layer in plate upper surface.
Further, detent projection and plate are integrally manufactured.
Further, there is hydroxyapatite coating layer in detent projection outer surface.
Further, cervical artificial disc tabulare gap filling device further includes biological filler, the biological fillerMaterial is suitable for being sent in air bag by the inlet.
Artificial disc after arthroplasty including above-mentioned cervical artificial disc tabulare gap filling device, further includes metal ball-and-socketJoint and lower soleplate, the air bag are set to above metal ball-and-socket joint, and the lower soleplate is set to below metal ball-and-socket joint.
Further, the lower soleplate lower surface is equipped with detent projection.
Compared with prior art, the invention has the following advantages:
1, the present invention only needs a prosthese just to meet various soleplate arched roof arcs by being filled to tabulare gapDegree, it is applied widely, it is practical；
2, using The present invention reduces the polishings in art to bone soleplate, so that the incidence fractured in art is reduced, andReduce intraoperative blood loss, also reduces the incidence of heterotopic ossification following surgical indirectly.
Detailed description of the invention
Fig. 1 is the perspective view of cervical artificial disc tabulare gap filling device；
Fig. 2 is the cross-sectional view of bowing of cervical artificial disc tabulare gap filling device；
Fig. 3 is the structural schematic diagram of artificial disc after arthroplasty；
Schematic diagram when Fig. 4 is work intervertebral disk prosthesis merging intervertenral space；
Fig. 5 is the schematic diagram after artificial disc after arthroplasty merging intervertenral space；
Fig. 6 is the schematic diagram after artificial disc after arthroplasty merging intervertenral space and inflation；
Fig. 7 is artificial disc after arthroplasty merging intervertenral space and fills the schematic diagram after air bag；
In figure: soleplate, 6- hypocentrum, the upper vertebra of 7- under 1- air bag, 2- soleplate, 3- detent projection, 4- metal ball-and-socket joint, 5-Body, 8- inlet, 9- air, 10-PMMA bone cement, 21- plate.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing, to the present invention intoRow is further described.
As shown in Figure 1, 2, cervical artificial disc tabulare gap filling device disclosed by the invention, including air bag 1 and soleplate2, air bag 1 is set to 2 lower section of soleplate, and the segmentation of soleplate 2 is independent several plates 21, and plate 21 is attached to 1 outer surface of air bag, plate21 lower surface of piece is Nian Jie with 1 outer surface of air bag.
Air bag 1 is equipped with inlet 8, communicates inside inlet 8 and air bag 1, of course, inlet 8 is furnished with valve.PlateThere are detent projection 3 in 21 upper surfaces, and detent projection 3 and plate 21 are integrally manufactured；3 appearance of 3 outer surface of detent projection and detent projectionThere is hydroxyapatite coating layer in face.21 material of plate is metal, and air bag 1 is high molecular material.
Cervical artificial disc tabulare gap filling device further includes biological filler, which is suitable for passing throughThe inlet 8 is sent in air bag 1.Biological bone cement etc. may be selected in biological filler.
As shown in figure 3, artificial disc after arthroplasty disclosed by the invention, in addition to including cervical artificial disc tabulare gap fillingOutside device, it further includes metal ball-and-socket joint 4 and lower soleplate 5, and air bag 1 is set to 4 top of metal ball-and-socket joint, and lower soleplate 5 is set to4 lower section of metal ball-and-socket joint.Lower 5 lower surface of soleplate is equipped with the appearance of detent projection 3, lower 5 lower surface of soleplate and detent projection 3Face is equipped with hydroxyapatite coating layer.
In use, as shown in Figure 4,5, artificial disc after arthroplasty is implanted into the intervertenral space between upper centrum 7 and hypocentrum 6,As shown in fig. 6, being carried out by inlet 8 to air bag 1 high-pressure aerated, air bag 1 is because of air 9 after merging artificial disc after arthroplastyIt fills and expands, 2 stress deformation of soleplate of fragment shape is simultaneously raised with air bag 1, and soleplate 2 is finally abundant with Fornicatus bone soleplateFitting.After C arm confirms the fitting of bone plate interface, as shown in fig. 7, PMMA bone cement 10 is packed into air bag 1 by inlet 8,To obtain primary stability.
Using The present invention reduces the polishings in art to bone soleplate, to reduce the incidence fractured in art, and subtractLack intraoperative blood loss, also reduces the incidence of heterotopic ossification following surgical indirectly.
The present invention only needs a prosthese just to meet various soleplate arched roof arcs by being filled to tabulare gapDegree, it is applied widely, it is practical.
Certainly, the present invention can also have other numerous embodiments, without deviating from the spirit and substance of the present invention,Those skilled in the art can make various corresponding changes and modifications, but these corresponding changes and change according to the present inventionShape all should fall within the scope of protection of the appended claims of the present invention.