CN109481101A - A kind of anterior approach self-retaining artificial vertebral body - Google Patents
A kind of anterior approach self-retaining artificial vertebral body Download PDFInfo
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- CN109481101A CN109481101A CN201811622585.5A CN201811622585A CN109481101A CN 109481101 A CN109481101 A CN 109481101A CN 201811622585 A CN201811622585 A CN 201811622585A CN 109481101 A CN109481101 A CN 109481101A
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- centrum component
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/3094—Designing or manufacturing processes
- A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurology (AREA)
- Prostheses (AREA)
Abstract
本发明公开了一种颈前路自固定人工椎体，属于医用假体制造技术领域。由一体化椎体部件构成，主要特征包括上端弧面、下端斜面、端面锯齿结构、端面微孔结构、侧壁菱形孔、后壁微孔结构、前壁弧面结构、后壁弧面结构以及前壁的自固定用螺孔结构。本发明在保留术后脊柱节段稳定性的前提下，去除了传统颈前路钛板的使用，该突破有效降低了颈前路颈椎椎体次全切除融合术的复杂程度，缩短了手术时间，减少了书中出血量，优化了颈前路植入器械的生物力学传导方式，规避了颈前路钢板导致的诸多并发症。通过以上设计发明，本颈前路自固定人工椎体可以有效降低传统钛笼的诸多并发症，改善颈前路椎体次全切除融合术后患者的预后。
The invention discloses an anterior cervical self-fixing artificial vertebral body, which belongs to the technical field of medical prosthesis manufacturing. It is composed of integrated vertebral body parts, and the main features include the upper end arc surface, the lower end slope, the end surface sawtooth structure, the end surface microporous structure, the side wall diamond hole, the rear wall microporous structure, the front wall arc structure, the rear wall arc structure and The self-fixing screw hole structure of the front wall. On the premise of preserving the stability of the spinal segment after surgery, the present invention removes the use of the traditional anterior cervical approach titanium plate, and the breakthrough effectively reduces the complexity of the anterior cervical approach and cervical vertebral body subtotal resection and fusion, and shortens the operation time , reduce the amount of bleeding in the book, optimize the biomechanical conduction mode of the anterior cervical implantation device, and avoid many complications caused by the anterior cervical plate. Through the above design and invention, the anterior cervical self-fixation artificial vertebral body can effectively reduce many complications of the traditional titanium cage and improve the prognosis of patients after subtotal cervical vertebral body resection and fusion.
Description
[technical field]
The invention belongs to medical prosthesis manufacturing technology fields, after being related to cervical vertebral body and its adjacent discs lesion resection
Carry out prosthese transplanting.
[background technique]
With modern people's improvement of living standard and living-pattern preservation, the disease incidence of cervical spondylosis is gradually risen.
Cervical pain has become one of the main reason for clinical medical, because the patient populations that cervical vertebra problem is gone to a doctor account for all diseases
1.5%.Cervical vertebral body time full excision fusion in premenstrual road is one for the treatment of most common operation method of cervical spondylosis, is answered extensively
For diseases such as cervical vertebra retrogression pathological changes, wound, tumours.
Currently, most common instrument is titanium cage combination Neck dissection in the full excision fusion of premenstrual road cervical vertebral body time,
This method is proved to that sufficient stability can be provided for Postoperative reconstruction cervical vertebral segment, to promote to merge, prevent titanium cage from shifting
Or collapse, it is widely used by spinal surgeons.But there are still shortcomings for this method: the installation of anterior plate makes the art formula
Become complicated, extend operating time, increases amount of bleeding；Compressing of the anterior plate to adjacent tissue can lead to oesophagus, tracheae damage
Wound, accelerates neighbouring section retrogression pathological changes at dysphagia；Traditional titanium cage is simple cylindrical structure, needs to rely on patient's warp in art
Test and its both ends trimmed, the titanium cage end face after trimming with cannot be bonded with soleplate, contact area is small to cut there are sharp keen protrusion,
It eventually leads to endplate structure and destroys the sinking of titanium cage, the stability of cervical vertebra after Destruction.The above complication can seriously affect patient's art
Rehabilitation and life security afterwards are badly in need of being resolved.
Currently, effective not yet and simple method or technique solves the problems, such as caused by above-mentioned Neck dissection.
[summary of the invention]
It is an object of the invention to solve the disadvantage that above-mentioned traditional titanium cage titanium plate, provide that structure is simple, anatomic form adaptation
Anterior approach self-retaining artificial vertebral body.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of anterior approach self-retaining artificial vertebral body, including hollow centrum component, the upper end of centrum component, antetheca, rear wall,
Front side angle and rear side wall are globoidal structure, the non-bevel structure in lower end；The upper surface and lower end surface of centrum component are sawed
The two sidewalls of tooth, upper surface and lower end surface and the top of rear wall are provided with microcellular structure；The side wall of centrum component opens up diamond shape
Fenestra, antetheca offer the screw hole for self-retaining.
A further improvement of the present invention lies in that:
Centrum component is the integral structure as made of titanium alloy 3D printing, and is fixedly mounted by screw；Centrum component
Front and rear wall and the thickness of left and right sidewall be 2mm, left and right diameter is 13~16mm, and anteroposterior diameter is 12mm.
Centrum component is that cross section is the rectangular of quadrangle and front and back belt curved angle, and antetheca radius of the radian is 15mm, rear wall
Radius of the radian is 33mm, and two side angle radius of the radian of front is 2mm, and two side angle radius of the radian of rear is 3mm；
The front and rear wall of centrum component respectively has a radian outstanding forward, the front and back arc of the radian and time full excision centrum
Degree matching, front end does not exceed the connecting lines of hypocentrum front and back walls after being implanted into centrum component, will not to before any cervical vertebra,
Organization in the rear's structure causes to oppress；The front-rear side walls of centrum component and the intersection of left and right sidewall have the circle for preventing stress from concentrating
Angle；The upper and lower side of centrum component is open, and internal reservation has the accommodating chamber for bone graft implantation.
Four screw holes are arranged in the antetheca of centrum component.
Four screw hole arrangements symmetrical above and below, the screw holes of central axes two sides are distributed by line of symmetry of central axes, all screw holes with
The angle in cross section face is consistent, is 40 ° ± 10 °；The main body portion diameter of four screw holes is 3.5~4mm；Four screw holes are equal
It is set as counter sink, is equipped with screw thread, screw and centrum component from locking；The nut portion diameter of four screw holes is 5mm, height
For 1mm；The package structure of 1mm thickness is equipped with around four screw holes.
The rear wall of centrum component is embedded with one layer of honeycomb microporous structure, and honeycomb microporous structure is by a rhombohedron
Unit cell units array forms, and having a size of 1 × 8 × 13.5mm, pore size is 400 μm, and porosity is about 65%；Honeycomb is micro-
It is interconnected between all holes inside pore structure, blood vessel and soft tissue can be made to grow into.
The upper end of centrum component is globoidal structure, and it is in arc on the inclined-plane of 9 degree of angles with cross section which, which is arranged in,
Face is 10~18 degree in the radius of the radian of sagittal plane.
The lower end of centrum component is bevel structure, is in 10~15 degree of angles with cross section.
Sawtooth includes upper end broached-tooth design and lower end broached-tooth design, and the depth of sawtooth is 0.7~1.0mm.
Microcellular structure includes upper end microcellular structure and lower end microcellular structure.
Diamond shape fenestra has several diamond holes to constitute, and the area of diamond hole accounts for 50% or more of the centrum component side walls gross area.
Compared with prior art, the invention has the following advantages:
The anatomical features of anterior approach self-retaining artificial vertebral body combination cervical vertebra of the present invention, upper end cambered surface and lower end inclined-plane are close to
Neighbouring terminal plate of vertebral body meets anatomic form adaptation.Laciniation increases frictional force between centrum and soleplate, effectively prevent
Vertebral subluxasion.Microcellular structure increase in upper and lower end face prevents from soleplate contact area, provides Bone Ingrowth space and promotes early stage steady
It is qualitative.Side wall opens big diamond hole, may advantageously facilitate bone fusion.The screw hole of antetheca setting, allows centrum to pass through screw self-retaining.
Further, the screw hole of centrum antetheca setting of the present invention keeps patient with screw that artificial vertebral body is directly fixed
In upper and lower soleplate, and no longer need additionally to use Neck dissection, so as to avoid many complication caused by Neck dissection,
And enough post surgery stabilizations can be provided to the segment rebuild.Meanwhile the fixed form changes the power of traditional titanium cage titanium plate
Supporting way and based on power conduction pattern, can effectively reduce screw-centrum interface stress, reduce screw loosening probability,
It is appropriate to increase transplanting bone stress, promote the generation of bone, promotes fusion.
Further, side-wall ratios shared by the diamond hole of centrum side wall of the present invention are big, these large area diamond holes are conducive to
Intrapyramidal bone grafting comes into full contact with time complete remaining bony part for cutting centrum, guarantees centrum Peripheral blood for entering in artificial vertebral body
Portion, sufficient blood supply and the contact of good bone are the important prerequisites of bone uptake fusion, this design can effectively improve postoperative melt
Conjunction rate and fusion speed.
Further, the upper end cambered surface and bottom end bevel structure of centrum of the present invention are by acquiring cervical spine in normal centrum or more
The anatomical structure design data of soleplate forms, the design so that the upper and lower side of artificial vertebral body is fitted closely with adjacent vertebral soleplate,
To increase contact area, it is therefore prevented that the generation for the stress concentration phenomenon that traditional titanium cage is widely present can effectively reduce vertebra
Body collapses, sinking odds.
Further, the broached-tooth design of centrum upper and lower side of the present invention increases between artificial vertebral body upper and lower end face and soleplate
Frictional force, greatly reduces before artificial vertebral body picture or a possibility that rearward displacement, abjection, to reduce cervical vertebra structure such as
A possibility that oesophagus, tracheae, rear structure such as injured spinal cords.
Further, the microcellular structure of centrum upper and lower side of the present invention is designed according to mechanical analysis structure, the micropore knot
Structure can greatly increase the contact area of centrum end face and soleplate, reduce artificial vertebra under the premise of guaranteeing centrum intensity
The actual elastic modulus of body grows into for bone tissue and provides space, reduces stress shielding, promotes the fusion of bone-artificial vertebral body, increases
Add postoperative instability stability.
Further, the microcellular structure on centrum rear wall of the present invention provides attachment point for the attachment of rear soft tissue, increases
The stability of early postoperation artificial vertebral body is added.
[Detailed description of the invention]
Fig. 1 is preceding isometric view；
Fig. 2 is rear isometric view；
Fig. 3 is front view；
Fig. 4 is rearview；
Fig. 5 is top view；
Fig. 6 is scheme of installation in the self-retaining cervical vertebra artificial vertebral body book.
Wherein: 1- centrum component；4- antetheca globoidal structure；5- rear wall globoidal structure；Side angle globoidal structure in front of 6-；After 7-
Square side wall globoidal structure；The upper end 8a- broached-tooth design；The lower end 8b- broached-tooth design；The upper end 9a- microcellular structure；The lower end 9b- micropore knot
Structure；10- rear wall microcellular structure；11- diamond shape fenestra；12- screw hole.
[specific embodiment]
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to figure 1, figure 2 and figure 3, anterior approach self-retaining artificial vertebral body of the invention, one as made of titanium alloy 3D printing
The centrum component 1 and screw of body structure are constituted, and centrum component 1 includes upper end globoidal structure, lower end bevel structure, antetheca cambered surface
Structure 4, rear wall globoidal structure 5, front side angle globoidal structure 6, rear side wall globoidal structure 7, upper end broached-tooth design 8a, lower end saw
Toothing 8b, upper end microcellular structure 9a, lower end microcellular structure 9b, rear wall microcellular structure 10, side wall diamond shape fenestra 11 and antetheca
Self-retaining screw hole 12.
1 front and rear wall of centrum component, left and right sidewall thickness are 2mm, to increase the contact surface of centrum component 1 end face and soleplate
Product, and enough support strengths are provided.The left and right diameter of centrum component 1 is 13~16mm, is meeting thoroughly subtracting to canalis spinalis
Under the premise of pressure, the resection of operation centrum is reduced to the greatest extent, has remained bony structure as much as possible, be conducive to postoperative melt
It closes.The anteroposterior diameter of centrum component 1 is 12mm, is matched with the anteroposterior diameter of human cervical spine centrum.1 front and rear wall of centrum component respectively has one
A radian outstanding forward, the radian are matched with time front and back radian of full excision centrum, and front end will not after being implanted into centrum component 1
More than the connecting line of upper hypocentrum front and back walls, the forward and backward side's institutional framework of any cervical vertebra will not be caused to oppress.Before centrum component 1
Rounded corner is carried out with left and right sidewall intersection afterwards, to prevent the excessively sharp keen caused stress of handover angle from concentrating.Centrum component 1
Upper and lower side remains enough opening areas, the centrum internal reservation accommodating chamber of enough volumes, in favor of the plant of bone graft
Enter.
1 antetheca of centrum component be provided with four screw holes 12, upper and lower end each two.Central axes two sides screw hole is with central axes
Line of symmetry distribution, all screw holes are consistent with the angle in cross section face, are 40 ° ± 10 °.The angle combination cervical spine in normal centrum
Anatomical structure designs, and guarantees that screw can be smoothly implanted into inside centrum via upper and lower soleplate by the screw hole, guarantees using
In the case where general length screw, screw will not be pierced by centrum contralateral cortex.The main body portion diameter of all screw holes 12 is 3.5
~4mm, this size had both allowed to follow closely using the cortex being relatively large in diameter, and guaranteed fixing intensity, can also be lesser in relative size
Retain enough screw hole sidewall thickness on centrum component 1, guarantees the support strength of centrum component 1.All screw holes 12 are disposed as
Counter sink is equipped with screw thread, allows screw and centrum component 1 from locking, guarantees the stability of implanted component.The nut portion of screw hole 12
Dividing diameter is 5mm, is highly 1mm, which is arranged under 1 antetheca of centrum component, so that screw is screwed into rear nut
Top is all sunk within screw hole nut portion, and without protruding from 1 antetheca of centrum component, the structure for fully achieving zero incisura is fixed
Justice prevents the compressing to cervical vertebra structure, damage.It is equipped with the package structure of 1mm thickness around screw hole 12, guarantees 12 knot of screw hole
The stabilization and integrality of structure.
1 rear wall of centrum component is embedded in one layer of honeycomb microporous structure 10, and the structure is by a rhombohedron unit cell units
Array forms, and pore size is 400 μm, and porosity is about 65%, which interconnects between all holes, allows blood
Pipe and soft tissue are grown into, and soft tissue can promote the stability of artificial vertebral body after growing into, even if occurring not merge or pseudarthrosis,
Centrum, which is also unlikely to dissociate completely to fall off, damages intraspinal tube spinal cord and front institutional framework.
The upper end of centrum component 1 is globoidal structure, which establishes on the inclined-plane for being in 9 degree of angles with cross section,
Cambered surface is 10~18 degree in the radius of the radian of sagittal plane.The end face of traditional titanium cage is sharp protrusion, does not consider end face and soleplate
Contact results in the generation of titanium cage sinking.The sagittal plane globoidal structure that the present invention designs makes end face and the soleplate of artificial vertebral body
Agree with closely, substantially increase contact area, reduces the incidence of sinking.The lower end of centrum component 1 is bevel structure 3,
It is in 10~15 degree of angles with cross section.The inclined-plane increases the contact area of centrum component 1 lower end surface and soleplate, reduces sinking hair
Raw rate.
The upper and lower end face of centrum component 1, which is all provided with, has counted sawtooth, and the depth of sawtooth is about 0.7~1.0mm.The sawtooth can be with
Effectively increase the frictional force between the upper and lower end face of centrum component 1 and soleplate, prevents centrum component 1 from producing in cervical vertebra motion process
The raw small sliding of cumulative bad induces centrum component 1 and dislocates.
The two sidewalls of the upper and lower end face of centrum component 1 and the top of rear wall are provided with microcellular structure.According to finite element dynamics
Analysis, the microcellular structure are arranged on the smallest region of 1 stress of centrum component, under conditions of guaranteeing 1 intensity of centrum component, are
Bone provides an elasticity modulus adaptive area and Bone Ingrowth space with merging for centrum component, may advantageously facilitate fusion, prevents vacation
The appearance in joint and the dislocation of centrum component, increases the stability of postoperative cervical vertebra.
The side wall of centrum component 1 is 11 structure of diamond shape fenestra, which is guaranteeing without stringent limitation
Under the premise of 1 intensity of centrum component, diamond shape hole area should be made to account for 50% or more of the 1 side wall gross area of centrum component, effectively to protect
It demonstrate,proves the abundant blood supply of bone graft and promotes growth, the fusion of bone with the contact of surrounding bone tissue.
Anterior approach self-retaining artificial vertebral body of the invention, when in use:
It completes the secondary of lesion centrum to cut off entirely, after the processing of neighbouring soleplate, struts upper hypocentrum with dilator, will cut off
Autologous bone or ready allograph bone from about 1 end opening of centrum component filling centrum component 1 inside, with haemostatic clamp clamp vertebra
Body component 1 is put into the centrum position of excision, slowly unclamps dilator, adjust centrum component 1 until putting to correct position: art
Middle x-ray shows that the upper end cambered surface broached-tooth design 9a of centrum component 1 is bonded completely with upper soleplate, the lower end Bevel saw of centrum component 1
Toothing 9b is bonded completely with lower soleplate, and 1 antetheca of centrum component is no more than the line of neighbouring centrum antetheca.Unclamp support
Device is opened, is drilled using medical bone drill along four 12 directions of screw hole of 1 antetheca of centrum component, is then 3.5mm's by four pieces of diameters
Screw is screwed into along boring direction, guarantees screw head face without departing from 1 antetheca of centrum component, whether is the position of x-ray inspection screw
Accurately.Subsequently complete the subsequent routine operation operation of the full excision fusion of premenstrual road cervical vertebral body time.
The present invention also has the advantages that:
The present invention eliminates the use of traditional anterior approach titanium plate under the premise of retaining postoperative spinal segments stability, should
The complexity for effectively reducing the full excision fusion of anterior approach cervical vertebral body time is broken through, operating time is shortened, reduces book
Middle amount of bleeding optimizes the biomethanics conduction pattern of anterior approach implantation instrument, evaded caused by Neck dissection it is many simultaneously
Send out disease.The present invention greatly optimizes the anatomic form of the upper and lower end face of artificial vertebral body, makes its anatomic form with adjacent endplates more
Adaptation.This anatomic fit optimizes the contact area for increasing artificial vertebral body and soleplate, to be effectively reduced answering for soleplate
Power is concentrated, and avoids the excessive caused endplate structure destruction of stress and the following artificial vertebral body sinks.The present invention is by 3D
The advantage of printing technique microcellular structure and traditional titanium cage combines, and artificial vertebral body side wall still wide-bore remains traditional titanium cage titanium
Net bone graft comes into full contact with time full excision centrum residue bony part, is conducive to accelerate Bony union.In artificial vertebral body
End face uses 3D printing microcellular structure, is conducive to improve artificial vertebral body local elasticity modulus, promotion artificial vertebral body is merged with bone.
By designing invention above, many complication of traditional titanium cage are can be effectively reduced in this anterior approach self-retaining artificial vertebral body, are improved
The prognosis of anterior approach Subtotal vertebrectomy post-fusion patient.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of anterior approach self-retaining artificial vertebral body, which is characterized in that including hollow centrum component (1), centrum component (1)
Upper end, antetheca, rear wall, front side angle and rear side wall are globoidal structure, the non-bevel structure in lower end；Centrum component (1)
The equal sawtooth in upper surface and lower end surface, the top of the two sidewalls and rear wall of upper surface and lower end surface are provided with microcellular structure；Centrum
The side wall of component (1) opens up diamond shape fenestra (11), and antetheca offers the screw hole (12) for self-retaining.
2. anterior approach self-retaining artificial vertebral body according to claim 1, which is characterized in that centrum component (1) is to be closed by titanium
Integral structure made of golden 3D printing, and be fixedly mounted by screw；The front and rear wall of centrum component (1) and left and right sidewall
Thickness is 2mm, and left and right diameter is 13~16mm, and anteroposterior diameter is 12mm.
3. anterior approach self-retaining artificial vertebral body according to claim 1 or 2, which is characterized in that centrum component (1) is transversal
Face is the rectangular of quadrangle and front and back belt curved angle, and antetheca radius of the radian is 15mm, and rear wall radius of the radian is 33mm, front two sides
Angle radius of the radian is 2mm, and two side angle radius of the radian of rear is 3mm；
The front and rear wall of centrum component (1) respectively has a radian outstanding forward, the front and back arc of the radian and time full excision centrum
Degree matching, front end does not exceed the connecting line of hypocentrum front and back walls after being implanted into centrum component (1), will not be to any cervical vertebra
Forward and backward side's institutional framework causes to oppress；The front-rear side walls of centrum component (1) and the intersection of left and right sidewall prevent stress collection
In fillet；The upper and lower side of centrum component (1) is open, and internal reservation has the accommodating chamber for bone graft implantation.
4. anterior approach self-retaining artificial vertebral body according to claim 1 or 2, which is characterized in that the antetheca of centrum component (1)
Four screw holes (12) are set.
5. anterior approach self-retaining artificial vertebral body according to claim 4, which is characterized in that four screw holes (12) are symmetrical above and below
The screw hole of arrangement, central axes two sides is distributed by line of symmetry of central axes, and all screw holes are consistent with the angle in cross section face, are
40°±10°；The main body portion diameter of four screw holes (12) is 3.5~4mm；Four screw holes (12) are disposed as counter sink, if
There is screw thread, screw and centrum component (1) lock certainly；The nut portion diameter of four screw holes (12) is 5mm, is highly 1mm；Four
The package structure of 1mm thickness is equipped with around a screw hole (12).
6. anterior approach self-retaining artificial vertebral body according to claim 1 or 2, which is characterized in that the rear wall of centrum component (1)
Be embedded with one layer of honeycomb microporous structure (10), honeycomb microporous structure (10) by a rhombohedron unit cell units array and
At having a size of 1 × 8 × 13.5mm, pore size is 400 μm, and porosity is about 65%；Honeycomb microporous structure (10) is internal
All holes between interconnect, blood vessel and soft tissue can be made to grow into.
7. anterior approach self-retaining artificial vertebral body according to claim 1 or 2, which is characterized in that the upper end of centrum component (1)
For globoidal structure (2), it is in radian of the cambered surface in sagittal plane on the inclined-plane of 9 degree of angles with cross section which, which is arranged in,
Radius is 10~18 degree；The lower end of centrum component (1) is bevel structure (3), is in 10~15 degree of angles with cross section.
8. anterior approach self-retaining artificial vertebral body according to claim 1 or 2, which is characterized in that sawtooth includes upper end sawtooth
Structure (8a) and lower end broached-tooth design (8b), the depth of sawtooth are 0.7~1.0mm.
9. anterior approach self-retaining artificial vertebral body according to claim 1 or 2, which is characterized in that microcellular structure includes upper end
Microcellular structure (9a) and lower end microcellular structure (9b).
10. anterior approach self-retaining artificial vertebral body according to claim 1 or 2, which is characterized in that diamond shape fenestra (11) is if having
Dry diamond hole is constituted, and the area of diamond hole accounts for 50% or more of centrum component (1) side wall gross area.
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