CN105615972A - Cervical interbody fusion system - Google Patents
Cervical interbody fusion system Download PDFInfo
- Publication number
- CN105615972A CN105615972A CN201610201237.5A CN201610201237A CN105615972A CN 105615972 A CN105615972 A CN 105615972A CN 201610201237 A CN201610201237 A CN 201610201237A CN 105615972 A CN105615972 A CN 105615972A
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- surface structure
- edge curved
- cervical
- main body
- emerging system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
- A61B17/7005—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/568—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor produced with shape and dimensions specific for an individual patient
Abstract
The invention discloses a cervical interbody fusion system which comprises a fusion main body, wherein a superior border curve structure and an inferior border curve structure are respectively arranged at two ends of the fusion main body; the fusion main body has a hollow column-shaped structure running through the superior and inferior border curve structures; a plurality of visual holes communicated with the hollow column-shaped structure are distributed in the surface of the fusion main body; and conical bulges are distributed on the surfaces of the superior and inferior border curve structures. The cervical interbody fusion system is well matched with a vertebral end-plate, has an ideal surface-surface combined contact surface, and has good biological mechanical stability.
Description
Technical field
The invention belongs to cervical vertebra medical apparatus and instruments technical field, it relates to a kind of cervical intervertebral emerging system.
Background technology
Anterior cervical operation often needs time full excision 1-2 centrum to complete decompression, for the rear space stayed of excision, current clinical usual employing roughly measure after titanium net fill. Owing to the two dimensional structure of titanium net and the curved-surface structure compatible degree of human cervical spine soleplate are not good enough, after art, titanium heavy, displacement off the net causes Unstable internal fixation, severe patient even Spinal injury etc. often occur. Therefore, between the cervical vertebral body that a kind of compatible degree height of urgent clinical needs, biomechanical stability are good, weighting material replaces titanium net.
No matter from the angle of diagnostics or surgery, the complex construction of backbone and have anatomy and the complicacy of mechanics feature concurrently, a problem having challenge of all can yet be regarded as. The form of centrum, biomechanics and moving cell also exist bigger variation, comprise whole anatomical section section, especially cervical vertebra. Above-mentioned situation makes backbone internal fixation material and fixing mode constantly weed out the old and bring forth the new. The eighties in 20th century is early stage, and titanium alloy is introduced orthopedics with metal grill plate shape by Patel etc., uses it for jaw facial bone and rebuilds and acetabular bone replacement operation. Since then, titanium metal reticulated structure is often used to treatment Cranial defect, reasonably cuts out and moulds in order to filling bone defects after shape, and is provided a supporting role target area. 1986, Harms and Biedermann has invented first, backbone " titanium net " inner matter, it is designed to oval grid column body, and be that osseous tissue provides support as a kind of backbone packing ring, due to the backbone high fusion rate that titanium network technology provides, its inner matter the most often used after having become cervical vertebral body subtotal ectomy at present. Anterior cervical vertebrae vertebra corpectomy is except the treatment that bone planted by bonding titanium net, titanium plate internal fixation is applicable to comprise the cervical spine disorders such as cervical spondylosis, cervical internal disc herniation, cervical vertebra wound, tuberculosis of spine, and obtained better effects, effectively prevent that autologous ilium plants that bone may bring infect for bone district, the complication such as fracture, long-term pain. Cervical operation uses titanium net, enough supporting roles can be played and provide suitable integrated environment for plant bone mass. But owing to the complicacy of backbone itself and surrounding structure makes the use of titanium net still have many shortcomings, due to the otherness of the biomechanics indexs such as titanium net rigidity and human cervical spine, after art, titanium off the net sinks, thrusts adjacent vertebral soleplate and finally cause titanium plate screw loosening or the phenomenon such as fracture, titanium net displacement to happen occasionally. Leading edge or trailing edge height between the vertebra that vertebra of performing the operation on the X-ray film of position, 3 months, 6 months, 12 months cervical vertebra standard sides after titanium heavy clinical diagnosis foundation art off the net saves, compared with taking the photograph sheet result with in after art 1 week, thrin intervertebral height sink >=2mm person, is namely considered as titanium off the net heavy. About titanium heavy reason off the net, research think multifactor caused by. Wherein the contact surface matching degree of titanium net and soleplate is a key factor. The research such as LimTH and Hakalo is thought, after art titanium off the net heavy may be less with titanium net and adjacent endplates contact area and not consider that endplate gradient etc. causes titanium net to mate with adjacent endplates poor, compatible degree is not good, and early postoperation easily sinks. The two thinks that the identical degree improving titanium net and adjacent endplates is off the net heavy significant to reduction titanium. Daubs etc. have looked back 27 example throat road vertebra corpectomy, titanium net autologous bone graft and anterior plate operation case, in the follow-up period of 21 months, overall mortality is 30%, wherein single segmental mortality is 6%, is significantly lower than the mortality (two segment 67%, three saves section 100%) of multi-segmental average 75%. It thinks that failure cause is except patient body situation is not good enough, titanium network edge is sharp keen and hardness is higher, except decompression technology, rebuilds the factors such as the biomechanics change that causes also very crucial after multi-segmental vertebra corpectomy. 71 example cervical spine disk pathological change and neck spinal canal stenosis cases have been looked back in the research such as Jonbergen, it has been found that 10 examples occur to sink, and wherein mainly concentrate on C6/7 and save section, it is believed that its reason may be relevant with titanium net design defect.Similar to foreign scholar, titanium net related complication be have also been made big quantity research by Chinese scholar. The research such as Li Xinyou is thought and is easily punctured sharp-pointed titanium net stress raisers adjacent endplates, enter in the spongy bone of centrum, is easy to occur the related complications such as titanium heavy, displacement off the net after art. The research such as Xu Jianwei and Jia Lianshun thinks that titanium net is planted bone and planted bone than autologous ilium and have superior part, but has and the possibility of sinking occurs, and this and titanium net contact area are less, and after cutting, between vertebra, the not good enough grade of stress distribution is relevant. But a large amount of clinical data illustrates that titanium net and centrum soleplate fitness are not good enough, cause contact surface from desirable face-face combines and turns into point-face combination, stress Relatively centralized, it is titanium heavy, the major cause that is shifted off the net that biomechanical stability changes.
It thus is seen that be badly in need of the cervical intervertebral emerging system of a kind of Stability Analysis of Structures of research and development, good mechanical properties.
Summary of the invention
For solving prior art Problems existing, the present invention provides a kind of novel individuation cervical intervertebral emerging system, replaces titanium net. This cervical intervertebral emerging system and centrum soleplate fitness are good, and face-face that contact surface is desirable combines, and biomechanics is stablized.
The present invention is achieved by the following technical solutions:
A kind of cervical intervertebral emerging system, comprises fusion main body, and the two ends of described fusion main body arrange integrated upper edge curved-surface structure and lower edge curved-surface structure with it respectively; Described fusion main body has the hollow columnar structures running through lower edge curved-surface structure, merges the viewing hole that body surfaces distribution is provided with the described hollow columnar structures of multiple connection; The surface of upper edge curved-surface structure and lower edge curved-surface structure is distributed with tapered protrusion; Described upper edge curved-surface structure mates formation plane-plane contact mutually with endplate structure under fusion upper cervical vertebrae; Endplate structure on the next cervical vertebra mates formation plane-plane contact to lower edge curved-surface structure mutually with merging.
Improving further as side of the present invention, the cross-sectional area of upper edge curved-surface structure and lower edge curved-surface structure is greater than the cross-sectional area merging main body, and is less than Cervical endplate cross-sectional area.
Improving further as side of the present invention, the shape of described viewing hole is trilateral, and adjacent trilateral is crisscross arranged in fusion main body and forms reticulated structure.
Improving further as side of the present invention, also comprise for the set screw fixing with cervical vertebra body, at least two set screws tilt through edge curved-surface structure respectively and lower edge curved-surface structure is connected with cervical vertebra.
Improve further as side of the present invention, upper edge curved-surface structure and lower edge curved-surface structure are also provided with the bolt block body for preventing set screw from coming off, bolt block body arranged transversely and the nut contact with set screw.
Improving further as side of the present invention, the material of all parts of cervical intervertebral emerging system is titanium.
Improving further as side of the present invention, cervical intervertebral emerging system passes through electron beam melting technique by printing integrated shaping for titanium alloy metal-powder 3D.
Compared with prior art, the present invention has following useful effect:
The cervical intervertebral emerging system of the present invention, comprises and merges main body, upper edge curved-surface structure and lower edge curved-surface structure; Hollow columnar structures is used for filler aggregate, the fusion of aggregate and cervical vertebra; The surface of upper edge curved-surface structure and lower edge curved-surface structure is distributed with tapered protrusion, prevents emerging system from sliding. In this structure, edge curved-surface structure and lower edge curved-surface structure are with need to merge centrum soleplate fitness good, and face-face that contact surface is desirable combines, and biomechanics is stablized. Common titanium net can be replaced, ensure to merge the structural stability of main body, prevent the phenomenon that stress is concentrated.
Further, titanium alloy metal-powder 3D printing the cervical intervertebral emerging system making individuation, the upper lower edge curved-surface structure of this intervertebral fusion system can agree with the upper and lower soleplate perfection of cervical vertebra, really accomplishes that desirable face-face combines completely.
Further, the shape of viewing hole is equilateral triangle, the stability that the structure of trilateral is crisscross arranged and adds and merge main body, prevents from merging main body stress deformation.
Accompanying drawing explanation
Fig. 1 is embodiment 1 cervical intervertebral emerging system schematic diagram one;
Fig. 2 is embodiment 1 cervical intervertebral emerging system schematic diagram two;
Fig. 3 is that embodiment 2 is with set screw cervical intervertebral emerging system schematic diagram;
Fig. 4 is with set screw cervical intervertebral emerging system application schematic diagram.
Wherein, 1, upper edge curved-surface structure; 2, main body is merged; 3, lower edge curved-surface structure; 4, hollow columnar structures; 5, tapered protrusion; 6, viewing hole; 7, set screw; 8, bolt mounting holes; 9, upper centrum; 10, centrum is excised; 11, the next centrum; 12, bolt block body.
Embodiment
Referring to drawings and Examples, providing the specific embodiment of the present invention, the present invention will be further described.
Embodiment 1
As shown in Figure 1, a kind of cervical intervertebral emerging system of the present invention, comprises and merges main body 2, and the two ends of described fusion main body 2 arrange edge curved-surface structure 1 and lower edge curved-surface structure 3 respectively; Described fusion main body 2 has the hollow columnar structures 4 running through lower edge curved-surface structure for filler aggregate, merges the viewing hole 6 that the distribution of main body 2 body surfaces is provided with the described hollow columnar structures 4 of multiple connection. Viewing hole 6 can, when aggregate filling is enriched, be convenient to observe inner aggregate situation; The surface of upper edge curved-surface structure 1 and lower edge curved-surface structure 3 is distributed with tapered protrusion 5. All parts of cervical intervertebral emerging system are titanium alloy metal-powder and are printed by 3D or other ordinary process are made. Merging main body 2, upper edge curved-surface structure 1 and lower edge curved-surface structure 3 is integral type structure.
As shown in Figure 2, adopt 3D printing technique that edge curved-surface structure 1 is mated mutually with endplate structure under upper fusion cervical vertebra; Lower edge curved-surface structure 3 mates mutually with endplate structure on the next fusion cervical vertebra. And the front end of upper edge curved-surface structure 1 is convex surface upwards, the front side of lower edge curved-surface structure 3 is downward convex surface. Emerging system can be made to be combined with face-face that the contact surface of cervical vertebra body is desirable, and contact is good, and stability increases. The cross-sectional area of upper edge curved-surface structure 1 and lower edge curved-surface structure 3 is greater than the cross-sectional area merging main body 2. Effectively being disperseed by power of fusion main body 2 can be made, solve the problems such as independent titanium net stress deformation. It is less than Cervical endplate cross-sectional area, effectively avoids and merge the situation that cervical vertebra receives compressing. Front end face and the aft end face of upper lower edge curved-surface structure are two dimensional structure, and the two dimensional structure of upper edge curved-surface structure 1 and lower edge curved-surface structure 3 correspondence is leveled up and down, and facilitate emerging system and anterior cervical titanium plate to fix.
Preferably, the shape of described viewing hole 6 is equilateral triangle, and adjacent equilateral triangle is crisscross arranged and is merging in main body 2. The stability that the structure of trilateral is crisscross arranged and adds and merge main body 2, prevents from merging main body 2 stress deformation. And equilateral triangle be arranged in profile, appearance design is attractive in appearance.
Embodiment 2
As shown in Figure 3, cervical intervertebral emerging system also comprises for the set screw 7 fixing with cervical vertebra body, and at least two set screws 7 tilt through edge curved-surface structure 1 respectively or lower edge curved-surface structure 3 is connected with cervical vertebra. Upper edge curved-surface structure 1 and lower edge curved-surface structure 3 are also provided with the bolt block body 12 for preventing set screw 7 from coming off, bolt block body 12 arranged transversely and the nut contact with set screw 7.
As shown in Figure 4, the cervical vertebra body that the upper centrum 9 of continuous print, excision centrum 10, the next centrum 11 form, after Post operation time full excision centrum 10, the cervical intervertebral emerging system of the present invention is fixed between upper centrum 9 and the next centrum 11, and undertaken fastening by the set screw that tilts upward and the set screw under being tilted to, prevent the set screw later stage from coming off by bolt block body 12 arranged transversely after fastening. Bolt block body 12 is club shaped structure.
Proof test: choose fresh adult cervical cadaver sample 9 tool crossed through dipped into formalin, (sample is provided by human anatomy research department of Jiao great medical college, Xi'an), 9 tool samples are carried out CT scan, designed respectively by CT and time entirely excise C3, C4, C5, C6, C7, C3/4, C4/5, C5/6, after C6/7 centrum with in adjacent vertebral, the individuation cervical intervertebral emerging system that lower soleplate agrees with completely, adopt EBM technology that titanium alloy powder 3D is printed as designed intervertebral fusion system, distinguish time full excision 9 tool sample, 1��2 centrum according to plan, and the individuation cervical intervertebral emerging system corresponding to installing, and the anterior cervical titanium plate using suitable length is fixed, finally sample is carried out axial compression, anteflexion, after stretch, the assessment of the biomechanical stability under four kinds of states is bent in side.
The cervical intervertebral emerging system produced need to implant after the perfection of soleplate up and down of adjacent vertebral agree with, after anterior cervical titanium plate is fixing, this individuation cervical intervertebral emerging system should cervical vertebra axial compression, anteflexion, after stretch, side bend biomechanics under four kinds of states and stablize, without complication appearance such as inner matter sinking, displacements.
Claims (7)
1. a cervical intervertebral emerging system, it is characterized in that: comprising and merge main body (2), the two ends of described fusion main body (2) arrange integrated upper edge curved-surface structure (1) and lower edge curved-surface structure (3) with it respectively; Described fusion main body (2) has the hollow columnar structures (4) running through lower edge curved-surface structure, merges the viewing hole (6) that main body (2) surface arrangement is provided with the described hollow columnar structures of multiple connection (4); The surface of upper edge curved-surface structure (1) and lower edge curved-surface structure (3) is distributed with tapered protrusion (5); Described upper edge curved-surface structure (1) mates formation plane-plane contact mutually with endplate structure under fusion upper cervical vertebrae; Endplate structure on the next cervical vertebra mates formation plane-plane contact to lower edge curved-surface structure (3) mutually with merging.
2. cervical intervertebral emerging system according to claim 1, it is characterized in that: the cross-sectional area of upper edge curved-surface structure (1) and lower edge curved-surface structure (3) is greater than the cross-sectional area merging main body (2), and is less than Cervical endplate cross-sectional area.
3. cervical intervertebral emerging system according to claim 1, it is characterised in that: the shape of described viewing hole (6) is trilateral, and adjacent trilateral is crisscross arranged in fusion main body (2) and forms reticulated structure.
4. cervical intervertebral emerging system according to claim 1, it is characterized in that: also comprise for the set screw (7) fixing with cervical vertebra body, at least two set screws (7) tilt through edge curved-surface structure (1) respectively and lower edge curved-surface structure (3) is connected with cervical vertebra.
5. cervical intervertebral emerging system according to claim 4, it is characterized in that: upper edge curved-surface structure (1) and lower edge curved-surface structure (3) are also provided with the bolt block body (12) for preventing set screw (7) from coming off, bolt block body (12) arranged transversely and the nut contact with set screw (7).
6. cervical intervertebral emerging system according to claim 1, it is characterised in that: the material of all parts of cervical intervertebral emerging system is titanium.
7. cervical intervertebral emerging system according to claim 1, it is characterised in that: cervical intervertebral emerging system passes through electron beam melting technique by printing integrated shaping for titanium alloy metal-powder 3D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610201237.5A CN105615972B (en) | 2016-03-31 | 2016-03-31 | A kind of cervical intervertebral emerging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610201237.5A CN105615972B (en) | 2016-03-31 | 2016-03-31 | A kind of cervical intervertebral emerging system |
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| Publication Number | Publication Date |
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| CN105615972A true CN105615972A (en) | 2016-06-01 |
| CN105615972B CN105615972B (en) | 2018-12-11 |
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| CN201610201237.5A Active CN105615972B (en) | 2016-03-31 | 2016-03-31 | A kind of cervical intervertebral emerging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112057150A (en) * | 2020-09-17 | 2020-12-11 | 西安市红会医院 | Fixing device for fracture of anterior and posterior column of acetabulum |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5405391A (en) * | 1993-02-16 | 1995-04-11 | Hednerson; Fraser C. | Fusion stabilization chamber |
| CN201040010Y (en) * | 2007-06-06 | 2008-03-26 | 中国人民解放军第二军医大学 | Full contact type vertebral column titanium netted bone grafting fusion device |
| CN203591315U (en) * | 2013-09-30 | 2014-05-14 | 上海市第一人民医院 | Low-profile locking type cervical vertebra titanium mesh device |
| CN203988509U (en) * | 2014-08-21 | 2014-12-10 | 山东威高骨科材料有限公司 | Anterior approach bone graft fusion titanium net |
| CN104207864A (en) * | 2013-05-29 | 2014-12-17 | 天津市威曼生物材料有限公司 | Dynamic stable mesh cage |
-
2016
- 2016-03-31 CN CN201610201237.5A patent/CN105615972B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5405391A (en) * | 1993-02-16 | 1995-04-11 | Hednerson; Fraser C. | Fusion stabilization chamber |
| CN201040010Y (en) * | 2007-06-06 | 2008-03-26 | 中国人民解放军第二军医大学 | Full contact type vertebral column titanium netted bone grafting fusion device |
| CN104207864A (en) * | 2013-05-29 | 2014-12-17 | 天津市威曼生物材料有限公司 | Dynamic stable mesh cage |
| CN203591315U (en) * | 2013-09-30 | 2014-05-14 | 上海市第一人民医院 | Low-profile locking type cervical vertebra titanium mesh device |
| CN203988509U (en) * | 2014-08-21 | 2014-12-10 | 山东威高骨科材料有限公司 | Anterior approach bone graft fusion titanium net |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112057150A (en) * | 2020-09-17 | 2020-12-11 | 西安市红会医院 | Fixing device for fracture of anterior and posterior column of acetabulum |
| CN112057150B (en) * | 2020-09-17 | 2021-07-06 | 西安市红会医院 | Fixing device for fracture of anterior and posterior column of acetabulum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105615972B (en) | 2018-12-11 |
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