CN209059552U - A kind of assembled personalized artificial centrum - Google Patents
A kind of assembled personalized artificial centrum Download PDFInfo
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- CN209059552U CN209059552U CN201821494033.6U CN201821494033U CN209059552U CN 209059552 U CN209059552 U CN 209059552U CN 201821494033 U CN201821494033 U CN 201821494033U CN 209059552 U CN209059552 U CN 209059552U
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Abstract
The utility model discloses a kind of assembled personalized artificial centrums, are assembled by upper fixed body, lower fixed body and middle connection body, wherein upper fixed body, lower fixed body are customization part, middle connection body is general part；The customization part is according to the molding personalized accessory of 3D printing, and the general part is mass standard component.Upper fixed body, lower fixed body are that its personalized designs meets accurate medical requirement with the contact surface of centrum, and intermediate middle connection body is mass standard component, the cost of entire artificial vertebral body can be substantially reduced by producing in batches, to be combined by customization part with general part, realize the personalized treatment demand under lower cost, the demand for meeting patient expands popularization space and the receiving degree of personalized treatment；On the other hand due to only needing to carry out personalized designs to upper fixed body, lower fixed body, the requirement of personalized designs is simplified, manufacturing time and consumption are shortened, is more advantageous to the flexible design of Personalized Ways.
Description
Technical field
The utility model belongs to medical treatment implantation prosthese technical field, is related to a kind of assembled personalized artificial centrum.
Background technique
Tumor of spine (spinal tumor) refers to the primary and secondary tumors for betiding backbone.Primary Spinal tumour
Overall incidence be about 0.4%.Most juvenile spinal tumours are benign, and middle-young patients malignant tumour possibility
Greatly.Benign tumour involves rear structure more, and malignant tumour then more involves centrum.Primary benign tumor of spine is generally in progress slowly,
The course of disease is long；Pernicious tumor of spine then makes fast progress, and the course of disease is short, and clinical symptoms occur comparatively fast, accounting for about newly-increased malignant bone tumor every year
10%.It is general using operation row tumor resection and internal fixation of spine for the pernicious tumor of spine for influencing spinal stability, it reaches
To alleviating symptom and maintaining the purpose of spinal stabilization, traditional internal fixation of spine generally uses titanium cage to replace former lesion centrum, but
Due to the limitation of titanium cage manufacturing process and specification, it can not exactly match and benefit from position in patient, cause titanium cage to slip, position
Shifting, even collapse of vertebra are even more especially to increase application risk in the larger position centrum of the stress such as replacement lumbar vertebrae, make to patient
At secondary injury and slight illness.
But there is the sinking of titanium cage and collapse situation in related Follow-up After research discovery some patientss, influence patient's postoperative curative effect.
The patient that YuChen etc. implements the full excision decompression joint titanium cage bone graft fusion of cervical vertebral body time to 300 carries out Follow-up After.
Follow-up results find that 182 (60.7%) position patients slight titanium cage occur and collapse (1-3mm), and 57 patients severe titanium cage occur and collapse
(> 3mm).With it is postoperative do not occur the patient that titanium cage collapses compared with, the neurological recovery situation collapsed there are titanium cage is obvious
It is to collapse patient lower than titanium cage.Serious titanium cage, which collapses, will lead to that cervical pain, nervous function be impaired, fixed complication such as unsuccessfully
Appearance.(ChenY,ChenDY,GuoYF,etal.SubsidenceofTitaniumMesh CageAStudyBase
Don300Cases [J] .JournalofSpinalDisorders&Techniques, 2008,21 (7): 489-492.) cause titanium
Cage is postoperative collapse an important reason be titanium cage and terminal plate of vertebral body contact area it is small.In traditional titanium cage implantation process, need
The length of titanium cage is trimmed to bone slot length.The not clipped one side of titanium cage is smooth structure, there is 6 smooth contact points, is cut
One end be in most cases 12 sharp keen contact points.This point contact mode cause its terminal plate of vertebral body surface pressing load compared with
Greatly, easily causing the destruction of terminal plate of vertebral body structure causes titanium cage to be pierced into centrum, and titanium cage is caused to collapse (Xu Jianwei, Jia Lianshun, Chen De
Jade, discussion [J] the Orthopedic Journal of China that etal. anterior cervical vertebrae Subtotal vertebrectomy titanium net bone grafting early stage collapses, 2002,
10(z1):1267-1269.)。
3D printing technique be one kind based on mathematical model, with the jointing materials such as powdery metal or plastic by by
The mode of layer printing constructs the technology of object.Compared with traditional manufacturing technology, 3D printing technique has the advantage that (1)
Save material and manufacturing cost.(2) without large-scale forging equipment and the special mold of production, manufacturing time is saved, improves production effect
Rate.(3) it can make that structure is complicated, unmanageable product.(4) it can be used for personalized customization.By the above advantage, 3D printing skill
Art has huge application value in the manufacture of body implant.
Utility model content
The utility model is solved the problems, such as to be to provide a kind of assembled personalized artificial centrum, be made by 3D printing technique
Customization part combined with general part, wherein customization part meet individual requirement, general part can be replaced with type selecting, overcome tradition
Titanium cage prosthese installs instability problem and existing customizes the single defect of artificial vertebral body model.
The utility model is to be achieved through the following technical solutions:
A kind of assembled personalized artificial centrum is assembled by upper fixed body, lower fixed body and middle connection body, wherein
Upper fixed body, lower fixed body are customization part, and middle connection body is general part；The customization part is based on 3D printing molding
Property accessory, the general part be batch preparation standard component；
The upper fixed body includes deck beam, upper centrum contact surface and mounting boss, and the deck beam is carrying knot
Structure, upper surface are uniformly distributed the fixed thorn of several tapers；Upper centrum contact surface is the porous structure being arranged between deck beam,
It is additionally provided with hollow bone grafting hole；Upper centrum contact surface, deck beam are that the conical surface anatomical shape contacted therewith matches
Personalized designs；Mounting boss is located at upper fixed body bottom, matches with middle connection body shape；
The lower fixed body includes through beam, hypocentrum contact surface and mounting boss, and the through beam is carrying knot
Structure, lower surface are uniformly distributed the fixed thorn of several tapers；Hypocentrum contact surface is the porous structure being arranged between through beam,
It is additionally provided with hollow bone grafting hole；Hypocentrum contact surface, through beam are that the conical surface anatomical shape contacted therewith matches
Personalized designs；Mounting boss is located at the top of lower fixed body, matches with middle connection body shape；
The middle connection body is made of the middle boxes of entity and the engraved structure between middle boxes, intermediate space shape
At bone grafting chamber；The middle boxes are connected and composed by intermediate transverse girder and stringer, and middle connection body upper and lower ends are respectively equipped with connection
Structure；Middle connection body is equipped with different lengths specifications and models.
The upper fixed body, lower fixed body and middle connection body assemble are as follows:
The mounting boss of the upper fixed body is respectively the conical surface matched with the connection structure of middle connection body upper end,
The two is interference fit；Middle connection body upper end is set in by the conical surface of the mounting boss of fixed body upper when top-down pressure
The conical surface on the inside of, be fastenedly connected by the elastic pressure of top-down pressure and contact surface surface；
The connection structure of the middle connection body lower end is respectively the conical surface matched with the mounting boss of lower fixed body,
The two is interference fit；Lower fixed body is set in by the conical surface of the connection structure of middle connection body lower end when top-down pressure
Mounting boss on the outside of, be fastenedly connected by the elastic pressure of top-down pressure and contact surface surface.
It is middle connection body that the mounting boss of the upper fixed body, the mounting boss of lower fixed body, which extend nested lengths,
1/4~1/3；The part that mounting boss extends is made of the framework and engraved structure to match with middle connection body；Connect with middle part
The framework that junctor is in contact tilts respectively inwards；The mounting boss of upper fixed body, the mounting boss structure of lower fixed body are symmetrical.
The tilt angle of the mounting boss of the upper fixed body, the mounting boss of lower fixed body and vertical direction be 2~
5°；Extend and is nested into the assembly of middle connection body convex there are enough Bone Ingrowth spaces between middle connection body bone grafting chamber.
The middle boxes of the middle connection body be closing waist structure, intermediate transverse girder cross section structure be subcircular or ellipse,
Its horizontal direction longest spacing is 0.8~0.9 times of deck beam horizontal direction longest spacing；
Stringer is that intermediate transverse girder corresponds to deck beam, through beam is smoothly connected different node vertical direction respectively, is had
There is certain curvature；
The engraved structure is the reticular structure that each support node is formed with dodecahedron or diamond lattic structure unit, net
Each grid cell aperture is 0.3~0.6mm in shape structure, and string diameter is 0.2~0.4mm.
The deck beam upper surface is uniformly distributed the fixed thorn of several tapers, and through beam lower surface is uniformly distributed several tapers
Fixed thorn；Intermediate transverse girder is connect with stringer intersection arc transition.
The general part is prepared based on 3D printing molding batch, and according to position difference used, there are many models to advise
Lattice；
If being used for thoracic vertebral segment, the length is 15mm-30mm, each regular intervals 1-5mm；
If for being used for lumbar motion segment, the length is 30-40mm, each regular intervals 1-5mm.
The fixed edge of screw is respectively equipped in front of the upper fixed body, lower fixed side, and fixed along upper design in screw
Screw fixed hole.
Compared with prior art, the utility model has technical effect beneficial below:
Assembled personalized artificial centrum provided by the utility model, wherein upper fixed body, lower fixed body are personalized
Part is customized, middle connection body is mass standard component, and the fastening of component is completed by assembling；Due to upper fixed body, lower fixation
Body is that its personalized designs meets accurate medical requirement with the contact surface of centrum, and intermediate middle connection body is mass
Standard component (three can pass through 3D printing molding realize), by produce in batches can substantially reduce entire artificial vertebral body at
This (molding can be made in the parameter for carrying out only needing to set when 3D printing), to mutually be tied by customizing part with general part
It closes, realizes the personalized treatment demand under lower cost, meet the demand of patient, the popularization for expanding personalized treatment is empty
Between and receiving degree；On the other hand it due to only needing to carry out personalized designs to upper fixed body, lower fixed body, simplifies personalization and sets
The requirement of meter, shortens manufacturing time and consumption, is more advantageous to the flexible design of Personalized Ways.
Assembled personalized artificial centrum provided by the utility model, thereon fixed body, lower fixed body and middle connection body
Fastening cooperated by component connection or structure and can satisfy the fastening requirements of entire component；Wherein by soft packing ring come group
With may be implemented completely to be fitted close, and soft packing ring has certain deformation behavior, while bringing centainly for artificial vertebral body
Fine tuning space, improve the adaptation range of artificial vertebral body；And when matching combined group by adopting conical surface interference, the conical surface with tilt angle
The two is set to be easier to assemble；Using interference fit principle, artificial vertebral body is produced from by the gravity of patient itself after the implantation
Pressure under above, while contact surface surface being made to generate elastic pressure, to obtain the connection of fastening；And pass through extension
Grow bone grafting inside centrum from inside to outside, the final bone connection realized between each component of artificial vertebral body makes to assemble more steady
It reinforces and leans on.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the configuration schematic diagram of the utility model；
Fig. 3 is the upper fixed body schematic top plan view of the utility model；
Fig. 4 is the lower fixed body elevational schematic view of the utility model；
Fig. 5 is the structural schematic diagram of the middle connection body of the utility model；
Fig. 6 is the conical surface connection schematic diagram of the utility model；
The upper fixed body structural schematic diagram of Fig. 7 the utility model；
Fig. 8 is the lower fixed body structural schematic diagram of the utility model.
Wherein, 1 is upper fixed body；2 be middle connection body；3 be lower fixed body；4 be engraved structure；6 fix for taper
Thorn；7 be upper centrum contact surface；8 be bone grafting hole；9 be deck beam；10 be mounting boss；12 be hypocentrum contact surface；Under 13 are
Bolster；14 stringers；15 intermediate transverse girders；18 be the conical surface.
Specific embodiment
The utility model is described in further detail below with reference to specific embodiment, described is to the utility model
Explanation rather than limit.
Referring to Fig. 1-Fig. 8, a kind of assembled personalized artificial centrum, by upper fixed body, lower fixed body and middle connection body
It assembles, wherein upper fixed body, lower fixed body are customization part, middle connection body is general part；The customization part is to be based on
The molding personalized accessory of 3D printing, the general part is the standard component of batch preparation；
The upper fixed body includes deck beam, upper centrum contact surface and mounting boss, and the deck beam is carrying knot
Structure；Upper centrum contact surface is the porous structure being arranged between deck beam, is additionally provided with hollow bone grafting hole；Upper centrum contact
Face, deck beam are the personalized designs that the conical surface anatomical shape contacted therewith matches；Mounting boss is located at upper fixation
Body bottom matches with middle connection body shape；
The lower fixed body includes through beam, hypocentrum contact surface and mounting boss, and the through beam is carrying knot
Structure；Hypocentrum contact surface is the porous structure being arranged between through beam, is additionally provided with hollow bone grafting hole；Hypocentrum contact
Face, through beam are the personalized designs that the conical surface anatomical shape contacted therewith matches；Mounting boss is located at lower fixation
At the top of body, match with middle connection body shape；
The middle connection body is made of middle boxes and the engraved structure between middle boxes, and intermediate space forms bone grafting
Chamber；The middle boxes are connected and composed by intermediate transverse girder and stringer, and middle connection body upper and lower ends are respectively equipped with connection structure；In
Portion's connector is equipped with different lengths specifications and models.
Further, the upper fixed body, lower fixed body and middle connection body assemble are as follows:
The mounting boss of the upper fixed body is respectively the conical surface matched with the connection structure of middle connection body upper end,
The two is interference fit；Middle connection body upper end is set in by the conical surface of the mounting boss of fixed body upper when top-down pressure
The conical surface on the inside of, be fastenedly connected by the elastic pressure of top-down pressure and contact surface surface；
The connection structure of the middle connection body lower end is respectively the conical surface matched with the mounting boss of lower fixed body,
The two is interference fit；Lower fixed body is set in by the conical surface of the connection structure of middle connection body lower end when top-down pressure
Mounting boss on the outside of, be fastenedly connected by the elastic pressure of top-down pressure and contact surface surface.
Specifically, the mounting boss of the upper fixed body, the mounting boss of lower fixed body extend embedding referring to Fig. 3-Fig. 8
Cover 1/4~1/3 that length is middle connection body；The part that mounting boss extends is by the framework that matches with middle connection body and engraves
Hollow structure composition；The framework being in contact with middle connection body tilts respectively inwards；The mounting boss of upper fixed body, lower fixed body
Mounting boss structure is symmetrical.
Specifically, the mounting boss of the upper fixed body, the mounting boss of lower fixed body and the inclination angle of vertical direction
Degree is 2~5 °；Extend between the mounting boss for being nested into middle connection body and middle connection body bone grafting chamber that there are enough bones
Grow into space.The engraved structure of the extension can induce bone grafting inside centrum and grow from inside to outside, so that artificial vertebra
Bone connection is generated between each component of body.
Referring to Fig. 5, the middle boxes of the middle connection body are closing waist structure, intermediate transverse girder cross section structure be subcircular or
Ellipse, horizontal direction longest spacing are 0.8~0.9 times of deck beam horizontal direction longest spacing；
Stringer is that intermediate transverse girder corresponds to deck beam, through beam is smoothly connected different node vertical direction respectively, is had
There is certain curvature；
The engraved structure is the reticular structure that each support node is formed with dodecahedron or diamond lattic structure unit, net
Each grid cell aperture is 0.3~0.6mm in shape structure, and string diameter is 0.2~0.4mm.
The deck beam upper surface is uniformly distributed the fixed thorn of several tapers, and through beam lower surface is uniformly distributed several tapers
Fixed thorn.
Specifically, the general part is prepared based on 3D printing molding batch, according to there are many position differences used
Model specification；
If being used for thoracic vertebral segment, the length is 15mm-30mm, each regular intervals 1-5mm；
If for being used for lumbar motion segment, the length is 30-40mm, each regular intervals 1-5mm.
Referring to Fig. 3, Fig. 4, the deck beam, through beam are according to the centrum personalized designs contacted, the centre
The cross section structure of crossbeam is subcircular or ellipse；
Intermediate transverse girder is connect with stringer intersection arc transition；
The engraved structure is the reticular structure that each support node is formed with dodecahedron or diamond lattic structure unit, net
Each grid cell aperture is 0.3~0.6mm in shape structure, and string diameter is 0.2~0.4mm.
The fixed edge of screw is respectively equipped in front of the upper fixed body, lower fixed side, and fixed along upper design in screw
Screw fixed hole.
Specific embodiment is given below.
Embodiment 1
Referring to Fig. 1-Fig. 8, assembled personalized artificial centrum provided by the utility model is consisted of three parts, respectively
Upper fixed body, lower fixed body and middle connection body, this three parts are 3D printing molding；Upper fixed body, lower fixed body be not according to
Demand with patient customizes design and production prints, middle connection body design many general specifications and models bulk print, in art
The suitable middle part chain junctor of selection is assembled with the upper and lower fixed body for customizing printing to be connect and is implanted into the patient.
The upper fixed body includes upper centrum contact surface, deck beam, mounting boss.
1. upper centrum contact surface, referring to the conical surface anatomical shape design contacted therewith, when installation, is attached at pair completely
Answer conical surface；Bone grafting hole is set among upper centrum contact surface, for filling bone tissue inside centrum；Upper centrum contact surface is whole
It is designed as porous structure, conducive to the fusion of artificial vertebral body and corresponding upper vertebral bone face.
It is primary load bearing structure 2. deck beam is designed as entity；Its surface is uniformly distributed the fixed thorn of several tapers, reinforces handle
Holding force keeps centrum fixed more firm.
3. mounting boss is located at upper fixed body bottom, interior design bone grafting chamber, inner wall and outer wall design engraved structure, are conducive to
Bone tissue grows into and merges；The mounting boss of upper fixed body is respectively the cone matched with the connection structure of middle connection body upper end
Face, the two are interference fit；Middle connection body is set in by the conical surface of the mounting boss of fixed body upper when top-down pressure
On the inside of the conical surface of upper end, it is fastenedly connected by the elastic pressure of top-down pressure and contact surface surface.
The lower fixed body includes hypocentrum contact surface, through beam, mounting boss.
1. hypocentrum contact surface, referring to the conical surface anatomical shape design contacted therewith, when installation, is attached at pair completely
Answer conical surface；Bone grafting hole is set among hypocentrum contact surface, for filling bone tissue inside centrum；Hypocentrum contact surface is whole
It is designed as porous structure, conducive to the fusion of artificial vertebral body and corresponding hypocentrum bone face.
It is primary load bearing structure 2. through beam is designed as entity；Its surface is uniformly distributed the fixed thorn of several tapers, reinforces handle
Holding force keeps centrum fixed more firm.
3. mounting boss is located at upper fixed body bottom, interior design bone grafting chamber, inner wall and outer wall design engraved structure, are conducive to
Bone tissue grows into and merges；The connection structure of middle connection body lower end is respectively the cone matched with the mounting boss of lower fixed body
Face, the two are interference fit；It is set in by the conical surface of the connection structure of middle connection body lower end when top-down pressure lower solid
On the outside of the mounting boss for determining body, it is fastenedly connected by the elastic pressure of top-down pressure and contact surface surface.
The middle connection body is integrally made of entity middle boxes with engraved structure；
1. middle connection body upper end is matched with the mounting boss of upper fixed body, surface is distributed porous structure, and utilization is porous
Structure is conducive to the characteristic of Bone Ingrowth, realizes the Bony union with upper fixed body, reaches steady in a long-term.
2. middle connection body lower end is matched with the mounting boss of lower fixed body, surface is distributed porous structure, and utilization is porous
Structure is conducive to the characteristic of Bone Ingrowth, realizes the Bony union with lower fixed body, reaches steady in a long-term.
3. several intermediate transverse girders of middle connection body whole design and stringer form primary load bearing structure；Intermediate transverse girder and vertical
Beam is the connection corresponding component part of the conical surface in upper end, lower end；In-between empty part forms perforative bone grafting chamber from top to bottom,
Bone grafting cavity wall design engraved structure, be conducive to bone growth with merge.
4. middle connection body design different lengths specifications and models, can mass production, doctor is according to the reality in different operations
Border situation selects suitable model to be used cooperatively with other components, reaches best surgical effect.
It is preoperative that upper fixed body, lower fixed body are respectively arranged in middle connection body,
Bone grafting chamber, bone grafting chamber, bone grafting chamber are realized from top to bottom completely through by bone grafting hole, bone grafting hole to cavity at this time
Interior filling bone tissue completes i.e. implementable prosthetic vertebral replacement operation after filling.
Specifically, it is middle part that the mounting boss of the mounting boss of the upper fixed body, lower fixed body, which extends nested lengths,
The 1/4~1/3 of connector；The part that mounting boss extends is made of the framework and engraved structure to match with middle connection body；
The framework being in contact with middle connection body tilts respectively inwards；The mounting boss knot of the mounting boss of upper fixed body, lower fixed body
Structure is symmetrical.
The tilt angle of the mounting boss of the upper fixed body, the mounting boss of lower fixed body and vertical direction be 2~
5°；Extend and is nested into the assembly of middle connection body convex there are enough Bone Ingrowth spaces between middle connection body bone grafting chamber.
The engraved structure of the extension can induce bone grafting inside centrum and grow from inside to outside so that each component of artificial vertebral body it
Between generate bone connection.
Further, the mounting boss extension of the mounting boss of the upper fixed body, lower fixed body is nested in middle part and connects
In junctor, furthermore contact inner wall of the mounting boss middle boxes with middle connection body designs 3 ° of drafting angle, holds that the two more
Easily assembly；Using interference fit principle, top-down pressure is generated to artificial vertebral body by the gravity of patient itself after the implantation
Power, while contact surface surface being made to generate elastic pressure, to obtain the connection of fastening.
The mounting boss of the present embodiment is nested in 1/3 or so in middle connection body, can ensure simultaneously mounting boss side wall and
Middle connection body bone grafting chamber has enough Bone Ingrowth spaces；The engraved structure of extension gives birth to bone grafting inside centrum from inside to outside
It is long, the final bone connection realized between each component of artificial vertebral body, make to assemble more consolidate it is firm.
In addition, the position used according to artificial vertebral body, it may be considered that whether design volume external fixer.Backbone thoracic vertebrae section people
The implantation of work centrum mostly uses rear operative approach, because of surgical exposure range and operation bow and arrow relationship, should not design additional fixed knot
Structure, while because thoracic vertebrae section own activity degree is small, stability is high, and screw-rod system can satisfy the steady of artificial vertebral body implantation completely
It is qualitative；The implantation of backbone lumbar segment artificial vertebral body is generally fixed using posterior resection, nail-stick system, and the road Zai Hangqian artificial vertebral body is planted
Enter, therefore the fixed edge of screw can be separately designed in front of upper fixed body, lower fixed side, and is fixed solid along upper design screw in screw
Determine hole, be fixed by screw fixed hole and upper hypocentrum, it is ensured that artificial vertebral body it is steady in a long-term.
Example given above is to realize that the utility model preferably example, the utility model is not limited to above-mentioned implementation
Example.Those skilled in the art according to the technical characteristic of technical solutions of the utility model made it is any it is nonessential addition,
Replacement, belongs to the protection scope of the utility model.
Claims (9)
1. a kind of assembled personalized artificial centrum, which is characterized in that assembled by upper fixed body, lower fixed body and middle connection body
It forms, wherein upper fixed body, lower fixed body are customization part, middle connection body is general part；The customization part is beaten based on 3D
Molding personalized accessory is printed, the general part is the standard component of batch preparation；
The upper fixed body includes deck beam, upper centrum contact surface and mounting boss, and the deck beam is bearing structure；On
Centrum contact surface is the porous structure being arranged between deck beam, is additionally provided with hollow bone grafting hole；Upper centrum contact surface, on
Bolster is the personalized designs that the conical surface anatomical shape contacted therewith matches；Mounting boss is located at upper fixed body bottom
Portion matches with middle connection body shape；
The lower fixed body includes through beam, hypocentrum contact surface and mounting boss, and the through beam is bearing structure；Under
Centrum contact surface is the porous structure being arranged between through beam, is additionally provided with hollow bone grafting hole；Hypocentrum contact surface, under
Bolster is the personalized designs that the conical surface anatomical shape contacted therewith matches；Mounting boss is located at lower fixed body top
Portion matches with middle connection body shape；
The middle connection body is made of middle boxes and the engraved structure between middle boxes, and intermediate space forms bone grafting chamber；
The middle boxes are connected and composed by intermediate transverse girder and stringer, and middle connection body upper and lower ends are respectively equipped with connection structure；Middle part
Connector is equipped with different lengths specifications and models.
2. assembled personalized artificial centrum as described in claim 1, which is characterized in that the upper fixed body, lower fixation
Body and middle connection body assemble are as follows:
The mounting boss of the upper fixed body is respectively the conical surface matched, the two with the connection structure of middle connection body upper end
For interference fit；The cone of middle connection body upper end is set in by the conical surface of the mounting boss of fixed body upper when top-down pressure
On the inside of face, it is fastenedly connected by the elastic pressure of top-down pressure and contact surface surface；
The connection structure of the middle connection body lower end is respectively the conical surface matched, the two with the mounting boss of lower fixed body
For interference fit；The dress of lower fixed body is set in by the conical surface of the connection structure of middle connection body lower end when top-down pressure
With outside the boss, it is fastenedly connected by the elastic pressure of top-down pressure and contact surface surface.
3. assembled personalized artificial centrum as claimed in claim 2, which is characterized in that the assembly of the upper fixed body is convex
Platform, lower fixed body mounting boss extend nested lengths be middle connection body 1/4~1/3；Mounting boss extend part by
Framework and the engraved structure composition to match with middle connection body；The framework being in contact with middle connection body tilts respectively inwards；
The mounting boss of upper fixed body, the mounting boss structure of lower fixed body are symmetrical.
4. assembled personalized artificial centrum as claimed in claim 2 or claim 3, which is characterized in that the dress of the upper fixed body
Tilt angle with boss, the mounting boss of lower fixed body and vertical direction is 2~5 °；Extend and is nested into middle connection body
There are enough Bone Ingrowth spaces between mounting boss and middle connection body bone grafting chamber.
5. assembled personalized artificial centrum as described in claim 1, which is characterized in that the centre of the middle connection body
Frame is closing waist structure, and intermediate transverse girder cross section structure is subcircular or ellipse, and horizontal direction longest spacing is deck beam horizontal direction
0.8~0.9 times of longest spacing；
Stringer is that intermediate transverse girder corresponds to deck beam, through beam is smoothly connected different node vertical direction respectively, has song
Degree.
6. assembled personalized artificial centrum as described in claim 1, which is characterized in that the engraved structure is each support
The reticular structure that node is formed with dodecahedron or diamond lattic structure unit, in reticular structure each grid cell aperture be 0.3~
0.6mm, string diameter are 0.2~0.4mm.
7. assembled personalized artificial centrum as claimed in claim 1 or 5, which is characterized in that the deck beam upper surface
It is uniformly distributed the fixed thorn of several tapers, through beam lower surface is uniformly distributed the fixed thorn of several tapers；Intermediate transverse girder intersects with stringer
Locate arc transition connection.
8. assembled personalized artificial centrum as described in claim 1, which is characterized in that the general part is beaten based on 3D
It is printed as type batch to prepare, according to position difference used, there are many model specifications；
If being used for thoracic vertebral segment, the length is 15mm-30mm, each regular intervals 1-5mm；
If for being used for lumbar motion segment, the length is 30-40mm, each regular intervals 1-5mm.
9. assembled personalized artificial centrum as described in claim 1, which is characterized in that the upper fixed body, lower fixation
The fixed edge of screw is respectively equipped in front of side, and fixed along upper design screw fixed hole in screw.
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| CN201821494033.6U CN209059552U (en) | 2018-09-13 | 2018-09-13 | A kind of assembled personalized artificial centrum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009581A (en) * | 2018-09-13 | 2018-12-18 | 陕西东望科技有限公司 | A kind of assembly type artificial vertebral body |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009581A (en) * | 2018-09-13 | 2018-12-18 | 陕西东望科技有限公司 | A kind of assembly type artificial vertebral body |
| CN109009581B (en) * | 2018-09-13 | 2024-02-02 | 陕西东望科技有限公司 | Assembled artificial vertebral body |
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