CN209032751U - A kind of assembly type artificial vertebral body - Google Patents

Abstract

The utility model discloses a kind of assembly type artificial vertebral bodies, 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

A kind of assembly type artificial vertebral body

Technical field

The utility model belongs to medical treatment implantation prosthese technical field, is related to a kind of assembly type artificial vertebral body.

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 solves the problems, such as to be to provide a kind of assembly type artificial vertebral body, by the customization of 3D printing technique production Part is combined with general part, wherein customization part meets individual requirement, general part can be replaced with type selecting, and it is false to overcome traditional titanium cage Body 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 assembly type artificial vertebral body is assembled by upper fixed body, lower fixed body and middle connection body, wherein upper fix Body, lower fixed body are customization part, and middle connection body is general part；The customization part is matched based on the molding personalization of 3D printing Part, the general part are the standard components 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 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.

Upper fixed body, lower fixed body and the middle connection body is assembled by connection component:

The connection component is the soft packing ring of structure in a ring, and inner wall and outer wall are equipped with ring buckle, ring buckle Section is semi-cylindrical hill structure；Inner wall ring buckle matches with mounting boss, and outer wall ring buckle matches with middle connection body；

Connection component is respectively arranged in the mounting boss outer rim of fixed body and lower fixed body, and inner wall is convex with assembly respectively The outer wall of platform is engaged；Upper fixed body and lower fixed body are installed in middle connection body by connection component respectively, connection component outer wall Ring buckle is engaged with the connection structure inner wall of middle connection body, and each component is fastenedly connected after assembly.

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；Deck beam, intermediate transverse girder, through beam and stringer intersection arc transition connect.

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:

Assembly type artificial vertebral body provided by the utility model, wherein upper fixed body, lower fixed body are personalized customization part, Middle connection body is mass standard component, and the fastening of component is completed by assembling；Since upper fixed body, lower fixed body are and vertebra Its personalized designs of the contact surface of body meet the requirement of accurate medical treatment, 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 cost ( The parameter for carrying out only needing to set when 3D printing can make molding), to be combined by customization part with general part, realize Personalized treatment demand under lower cost, meets the demand of patient, expands the popularization space of personalized treatment and connects Receipts degree；On the other hand due to only needing to carry out personalized designs to upper fixed body, lower fixed body, wanting for personalized designs is simplified It asks, shortens manufacturing time and consumption, be more advantageous to the flexible design of Personalized Ways.

Assembly type artificial vertebral body provided by the utility model, the thereon fastening of fixed body, lower fixed body and middle connection body It can satisfy the fastening requirements of entire component by component connection or structure cooperation；Wherein being assembled by soft packing ring can be with Realize complete tight fit, and soft packing ring has certain deformation behavior, while bringing certain fine tuning for artificial vertebral body The adaptation range of artificial vertebral body is improved in space；Both and when matching combined group by adopting conical surface interference, the conical surface with tilt angle makes More easily assemble；Using interference fit principle, artificial vertebral body is generated from top to bottom by the gravity of patient itself after the implantation Pressure, while make contact surface surface generate elastic pressure, to obtain the connection of fastening；And centrum is made by extension Internal bone grafting is grown from inside to outside, the final bone connection realized between each component of artificial vertebral body, make to assemble more consolidate it is firm.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the perspective structure schematic diagram of the utility model；

Fig. 3 is the configuration schematic diagram for the embodiment that the utility model is connected by component；

Fig. 4 is one of the upper fixed body structural schematic diagram of the utility model；

Fig. 5 is the upper fixed body second structural representation of the utility model；

Fig. 6 is one of the lower fixed body structural schematic diagram of the utility model；

Fig. 7 is the lower fixed body second structural representation of the utility model；

Fig. 8 is the structural schematic diagram of the middle connection body of the utility model；

Fig. 9 is the cross-sectional view of the middle connection body of the utility model；

Figure 10 is the connecting component structure 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；5 be connection component；6 It is pierced for taper is fixed；7 be upper centrum contact surface；8 be bone grafting hole；9 be deck beam；10 be mounting boss；11 be annular groove；12 are Hypocentrum contact surface；13 be through beam；14 stringers；15 intermediate transverse girders；16 be fitting groove；17 be bone grafting chamber.

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-Figure 10, a kind of assembly type artificial vertebral body, assembled by upper fixed body, lower fixed body and middle connection body and At wherein upper fixed body, lower fixed body are customization part, middle connection body is general part；The customization part is based on 3D printing Molding personalization accessory, the general part are the standard components 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, referring to Fig. 3-Figure 10, the upper fixed body, lower fixed body and middle connection body pass through connection component To assemble:

The connection component is the soft packing ring of structure in a ring, and inner wall and outer wall are equipped with ring buckle, ring buckle Section is semi-cylindrical hill structure；Inner wall ring buckle matches with mounting boss, and outer wall ring buckle matches with middle connection body；

Connection component is respectively arranged in the mounting boss outer rim of fixed body and lower fixed body, and inner wall is convex with assembly respectively The outer wall of platform is engaged；Upper fixed body and lower fixed body are installed in middle connection body by connection component respectively, connection component outer wall Ring buckle is engaged with the connection structure inner wall of middle connection body, and each component is fastenedly connected after assembly.

Referring to Fig. 8, Fig. 9, the middle boxes of the middle connection body are closing waist structure, and intermediate transverse girder cross section structure is nearly circle Shape 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. 4, Fig. 6, 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.

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-Figure 10, assembly type artificial vertebral body provided by the utility model is consisted of three parts, respectively upper to fix Body, lower fixed body and middle connection body, this three parts are 3D printing molding；Upper fixed body, lower fixed body are customization part, according to The demand of different patients customizes design and production printing；Middle connection body is general part, can be designed as many general specification, Bulk print；Doctor during surgery as the case may be, select suitable middle part chain junctor and customize printing upper fixed body, Lower fixed body is implanted into the patient after assembling connection.In addition this product includes two groups of polyethylene washers as connection component, respectively It is installed on fixed body, lower fixed body, for fastening the fixation of upper and lower fixed body and middle connection body.

The upper fixed body includes upper centrum contact surface, deck beam and mounting boss.

1. upper centrum contact surface, referring to the conical surface anatomical shape personalized designs contacted therewith, when installation, pastes completely Invest corresponding conical surface；Bone grafting hole is set among upper centrum contact surface, for filling bone tissue inside centrum；Upper centrum contact Face whole design is 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 further surface is uniformly distributed several tapers and fixes Thorn keeps centrum fixed more firm to reinforce holding power.

3. mounting boss is located at upper fixed body bottom, two ring annular grooves are designed in outside, and annular slot cross-section is semi-cylindrical canyon Structure, for matching polyethylene washer.

4. upper fixed body inner wall designs engraved structure, seeks connections with and grow conducive to bone tissue.

The lower fixed body includes hypocentrum contact surface, through beam, mounting boss.

1. hypocentrum contact surface, referring to the conical surface anatomical shape personalized designs contacted therewith, when installation, pastes completely Invest corresponding conical surface；Bone grafting hole is set among hypocentrum contact surface, for filling bone tissue inside centrum；Hypocentrum contact Face whole design is 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 the top of lower fixed body, two ring annular grooves are designed in outside, and annular slot cross-section is semi-cylindrical canyon Structure, for matching polyethylene washer.

4. lower fixed body inner wall designs engraved structure, seeks connections with and grow conducive to bone tissue.

The middle connection body is integrally made of the middle boxes of entity with inner wall hollow out structure, includes fitting groove and bone grafting Chamber.

1. fitting groove is located at middle connection body top, bottom end, two ring annular grooves are designed in inside, and annular slot cross-section is half Circular recess structure, for matching polyethylene washer.

2. several intermediate transverse girders and stringer are designed in middle connection body middle section, by the whole group of intermediate transverse girder and stringer and fitting groove Internal to form perforative bone grafting chamber from top to bottom at the primary load bearing structure of middle connection body, bone grafting cavity wall designs hollow out Structure, be conducive to bone growth with merge.

3. 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.

In the present embodiment, connection component includes two groups of polyethylene washers, polyethylene washer structure in a ring, inner wall and outer wall Ring buckle is separately designed, ring buckle section is semi-cylindrical hill structure.First two groups of polyethylene washers are respectively arranged in when use The mounting boss outer rim of upper fixed body and lower fixed body, the ring buckle on polyethylene washer inner wall can be connect with middle part respectively at this time The fitting groove occlusion on body top, bottom end；Upper fixed body and lower fixed body are installed in middle connection body respectively again, gathered at this time Ring buckle on ethylene washer outer wall is engaged with fitting groove (annular groove) respectively, and after the assembly is completed, assembly type artificial vertebral body is each Component reaches tightening state.

During surgery, the operating procedures such as bone tissue filling and prosthese installation can be carried out after the completion of doctor assembles.

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 (7)

1. a kind of assembly type artificial vertebral body, which is characterized in that it 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 formed based on 3D printing Personalized 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 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. assembly type artificial vertebral body as described in claim 1, which is characterized in that the upper fixed body, lower fixed body and in Portion's connector is assembled by connection component:

The connection component is the soft packing ring of structure in a ring, and inner wall and outer wall are equipped with ring buckle, ring buckle section For semi-cylindrical hill structure；Inner wall ring buckle matches with mounting boss, and outer wall ring buckle matches with middle connection body；

Connection component is respectively arranged in the mounting boss outer rim of fixed body and lower fixed body, inner wall respectively with mounting boss Outer wall occlusion；Upper fixed body and lower fixed body are installed in middle connection body by connection component respectively, the outer wall circular of connection component Button is engaged with the connection structure inner wall of middle connection body, and each component is fastenedly connected after assembly.

3. assembly type artificial vertebral body as described in claim 1, which is characterized in that the middle boxes of the middle connection body are to receive Waist structure, intermediate transverse girder cross section structure are subcircular or ellipse, and horizontal direction longest spacing is between deck beam horizontal direction longest Away from 0.8~0.9 times；

Stringer is that intermediate transverse girder corresponds to deck beam, through beam is smoothly connected different node vertical direction respectively, has song Degree.

4. assembly type artificial vertebral body as described in claim 1, which is characterized in that the engraved structure be each support node with The reticular structure that dodecahedron or diamond lattic structure unit are formed, each grid cell aperture is 0.3~0.6mm in reticular structure, String diameter is 0.2~0.4mm.

5. assembly type artificial vertebral body as claimed in claim 1 or 2, which is characterized in that the deck beam upper surface is uniformly divided The fixed thorn of several tapers of cloth, through beam lower surface are uniformly distributed the fixed thorn of several tapers.

6. assembly type artificial vertebral body as described in claim 1, which is characterized in that the general part is formed based on 3D printing Prepared by batch, 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.

7. assembly type artificial vertebral body as described in claim 1, which is characterized in that before the upper fixed body, lower fixed side Side is respectively equipped with the fixed edge of screw, and fixed along upper design screw fixed hole in screw.