A kind of expansible vertebral plasty supportTechnical field
The present invention and a kind of medical apparatus and instruments, be specifically related to the Intrapyramidal expansible shaped bracket of a kind of implantation.
Background technology
Spinal fracture can be caused by many factors.Can be classified as according to its cause of disease: 1) physics responsible, as violence causesTraumatic fracture；2) age physiologic factor, such as osteoporosis；3) biological factor, the disease caused such as bacterial inflammation, abscessReason etc..The expectant treatment method of spinal fracture, including: lie up, Brace Treatment, osteosporosis resistant medicament treatment etc..OnStating Therapeutic Method, not only patient is difficult to stand, and therapeutic effect is poor.It addition, surgical operation therapy spinal fracture, it is mainMeans are, use open interior immobilization treatment.Its shortcoming is, the wound face of operation is bigger；And for osteoporotic compressionProperty fracture, owing to the bone strength of patient reduces, obtain reliably, stably in fixing highly difficult.It addition, it is intravertebral fixingPart, may deviate from from sclerotin, so that Unstable internal fixation, causes the loss of kyphosis deformity correction degree.
Within 1984, carried out first case percutaneous vertbroplasty in Amiens university of France by Galibert and Deramond,Enter vertebral body by transcutaneous placement sleeve pipe injection bone cement and complete the enhancing of vertebral body.
The side of balloon expandable in U.S. Berkeley orthopedist Mark Reiley employing percutaneous puncture vertebral body in 1999Method, makes corpus vertebrae replacement recession return of serve capsule, then injects bone cement entrance vertebral body, i.e. Percutaneous kyplasty.
Patent ZL 200410086120.4 describes metal tennis balled vertebrae shaping apparatus, use high-elastic wire cross aroundMake spherical or oval spherical replacement sacculus and strut the vertebral body compressed, then withdraw from metal ball or metal ball is retained in vertebraInternal, refill bone cement or with other vertebral body reinforcing material.
But, there is its own shortcomings in described sacculus wire netting ball: 1) bone cement easily leaks；2) sacculus is easily punctured by bony spur；3) support force of sacculus or wire netting ball is non-directional, can oppress the vertebral body position without supporting；4) from the support playing supportPower can not adjust, and supports instability；5) it may happen that vertebral height is lost again in operation.
Summary of the invention
The shortcoming that the present invention be directed to above-mentioned prior art, it is provided that a kind of adjustable expanded height and dimension, expandsThe height opened can maintain, and without the support extracted out in vertebral body.
The technical scheme is that a kind of expansible vertebral plasty support, including support, core pipe and nut.DescribedFrame is hollow pipe, and it is at least divided into front end, main body, rear end three part；Described main body includes support bar and the support of upper and lower symmetrySheet；Described core pipe is made up of front and rear, and there is external screw thread at its rear portion；Described nut has leading portion and back segment, the interior spiral shell of its inner chamberStricture of vagina coordinates with the rear portion of core pipe, and leading portion is connected with the rear end of support, and back segment is provided with the breach of rotatable nut；Before described supportFix between end and the front portion of core pipe and be connected.
Described support is formed through laser engraving by niti-shaped memorial alloy pipe, stainless steel tube or macromolecular material.
Described support chip can connect expanding plate.Connect expanding plate and be to ensure that the area of expansion.Support chip and expanding plateConnected mode can be welding or bonding.
The front end of described support is bonding, welding or mechanical pins connection with the anterior fixing connected mode of core pipe.
The leading portion of described nut is fluted, and groove is connected with the boss of back-end support inner chamber, and the leading portion top of nutLive the inner chamber of back-end support.
The material of described core pipe is marmem pipe, stainless steel tube or other material, the number of openings on its tube wallAt least one.
The material of described nut is marmem, rustless steel or other material.
Support regulates its degrees of expansion by rotating nut.Dimension can also be adjusted by swinging mounting.
Compared with prior art, it is an advantage of the current invention that: the expansion of support has directivity, can avoid oppressing without supportThe vertebral body position opened, makes to strut effect more efficient.The height-adjustable of stent-expansion, and can be locked, support force is more stable.Expansion is subsided after vertebral body, and support is without extracting in vertebral body, and the vertebral body being propped up squeezes in the elastic creep of adjacent upper and lower intervertebral discPressure, its height can completely be maintained, therefore be there is not the situation that vertebral height is lost again in art.Support after expansion can be effectiveStrut the vertebral body of compression, recover vertebral height.It is internally formed space, required pushing away when not only can reduce injection bone cement vertebral bodyPower, and disposed within being difficult to of bone cement is flowed, and can reduce leakage.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the accompanying drawings with detailed description of the invention；
Fig. 1 is before expansible vertebral plasty support 1(struts)；
Fig. 2 is after expansible vertebral plasty support 1(struts)；
Fig. 3 is support 1；
Fig. 4 is core pipe；
Fig. 5 is nut；
Fig. 6 is before expansible vertebral plasty support 2(struts)；
Fig. 7 is after expansible vertebral plasty support 2(struts)；
Fig. 8 is support 2；
Fig. 9 is the partial sectional view that back-end support is connected with nut leading portion；
Figure 10 is the accompanying drawing of patent ZL200410086120.4.
Detailed description of the invention
Below according to embodiment and accompanying drawing, the present invention is described in further detail.
Embodiment one
In conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 9, shown in be the one of a kind of expansible vertebral plasty support of the present inventionSpecific embodiment, including support 1, core pipe 2 and nut 3.Its medium-height trestle 1 can be by niti-shaped memorial alloy pipe laser engravingBecoming, its structure includes front end 11, main body 12, rear end 13, and wherein main body 12 includes support bar 121 and the support chip of upper and lower symmetry122 compositions.Core pipe 2 can be formed by marmem pipe, stainless steel tube or other materials processing, and core pipe has inner chamber 23, andAn at least through hole on its tube wall, in order to bone cement enters core pipe；The outer surface at the rear portion 22 of core pipe has screw thread, this spiral shellStricture of vagina can coordinate with nut 3.Nut 3 can be made up of marmem pipe, stainless steel tube or other material, and its structure includes leading portion31, back segment 32, inner chamber, wherein nut leading portion 31 is connected with support 1, and connected mode can be bonding, welding or mechanical pins connection；Nut back segment 32 jagged 33, by this breach 33 rotatable nut 3, its inner chamber has screw thread, and nut 3 can be on core pipe 2Thread helix moves.Support 1 is enclosed within core pipe 2, and front end 11 is completely fixed with core pipe 2, and rear end 13 connects with the leading portion 31 of nut 3Connecing, adjusting nut 3, in the position of core pipe 2, determines the degree of the expansion of support 1.
Niti-shaped memorial alloy pipe laser engraving becomes the tubular structure of support, shapes the expansion shape of support 1After process, support 1, nut 2 being all enclosed within core pipe 2, the front end 11 of support can be fixed with pin with core pipe 2, and by supportThe boss 131 of rear end 13 inner chamber snap in the groove of leading portion 31 of nut, can realize can only rotating between support 1 and nut 3And can not the function of axially opposing movement.Expansible vertebral plasty support is put in frozen water, rotates nut 1 and support 3 is stretchedFor the tubulose before expansion, support 1 is tightly bonded together with core pipe 2.
By expansible vertebral plasty support by sending in vertebral body outside cone nut or pedicle of vertebral arch, adjust expansible vertebral bodyThe angle of shaped bracket, after determining the direction of vertebral body needing to strut, rotates nut 3 expandable stent 1, and support bar 121 can be according toDirection bending during setting, support 1 reverts to the expansion shape of sizing under human body temperature, and the position of adjusting nut 3 determines props upThe degrees of expansion of frame 1, the support chip 122 of the support 1 after expansion effectively struts the vertebral body of compression, recovers vertebral height, vertebral bodyIt is internally formed space, bone cement or other vertebral body reinforcing material are filled in the inner space of vertebral body, thus fixing compression boneThe vertebral body of folding.
Embodiment two
In conjunction with Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, shown in be the one of a kind of expansible vertebral plasty support of the present inventionSpecific embodiment, including support 1, core pipe 2 and nut 3.Its medium-height trestle 1 can be formed through laser engraving by stainless steel tube, its structureIncluding front end 11, main body 12, rear end 13, wherein main body 12 includes the support bar 121 of upper and lower symmetry, support chip 122 and expanding plate123 compositions.Can expand in the predetermined direction to control support, when laser engraving, support bar 121 be formed with pipe axisCertain angle, the width causing support chip is less, in order to ensure the area of the supporting surface of support, welds on support chip 122Connect or bonding expanding plate 123.Core pipe 2 can be formed by marmem pipe, stainless steel tube or other materials processing, in core pipe hasChamber 23, and at least through hole of on its tube wall, in order to bone cement enters core pipe；The outer surface at core pipe rear portion 22 hasScrew thread, this screw thread can coordinate with nut 3.Nut 3 can be made up of marmem pipe, stainless steel tube or other material, its knotStructure includes leading portion 31, back segment 32, breach 33, and wherein nut leading portion 31 is connected with support, and connected mode can be bonding, weldingOr mechanical pins connection；Nut back segment 32 jagged 33, by this breach 33 rotatable nut 3, its inner chamber has screw thread, and nut 3 can edgeThe thread helix on core pipe 2 moves.Support 1 is enclosed within core pipe 2, and front end 11 is completely fixed with core pipe 2, rear end 13 and nut 3Leading portion 31 connect.Adjusting nut 3 is in the position of core pipe 2, it may be determined that the degree of the expansion of support 1.
Stainless steel tube becomes the tubular structure of support through laser engraving, after the expansion shape of support is carried out setting treatment, and willSupport 1, nut 2 are all enclosed within core pipe 2, and the front end 11 of support can be fixed with pin with core pipe 2, and by the rear end 13 of supportThe boss 131 in chamber snaps in the groove of the leading portion 31 of nut, can realize can only rotating between support 1 and nut 3 and can not be axialThe function of relative movement.Turn nut 1 moves the tubulose before support 3 is stretched as expansion, is tightly bonded together with core pipe 2.
By expansible vertebral plasty support by sending in vertebral body outside cone nut or pedicle of vertebral arch, adjust expansible vertebral bodyThe angle of shaped bracket, after determining the direction of vertebral body needing to strut, rotates nut 3 releases clamp 1, and support 1 can recover sizingExpansion shape, support bar can according to setting time direction bending, the position of adjusting nut 3 can determine that the degrees of expansion of support 1,The expanding plate 122 of the support 1 after expansion can effectively strut the vertebral body of compression, recovers vertebral height, is internally formed space vertebral body,Bone cement or other vertebral body reinforcing material are filled in the inner space of vertebral body, thus the vertebral body of fixing compression fracture.