CN101496733A - Minimally invasive dual-locking implantation system for cervical vertebra - Google Patents
Minimally invasive dual-locking implantation system for cervical vertebra Download PDFInfo
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- CN101496733A CN101496733A CNA2009100260440A CN200910026044A CN101496733A CN 101496733 A CN101496733 A CN 101496733A CN A2009100260440 A CNA2009100260440 A CN A2009100260440A CN 200910026044 A CN200910026044 A CN 200910026044A CN 101496733 A CN101496733 A CN 101496733A
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Abstract
The invention relates to a cervical spine minimally invasive doubly-locked transplant system, which comprises a cervical spine forward board and a locked nail, wherein the length direction arc semidiameter of the cervical spine forward board is between 30 and 50 mm; a screw cap of the locked nail is provided with external threads, a locked hole of the cervical spine forward board is provided with internal threads, the cervical spine forward board is fixed on an adjacent cervical spine body which needs to be repaired by screwing a cross slot on the screw cap of the locked nail, the external threads of the screw cap of the locked nail and the locked hole with threads of the cervical spine forward board realize primary tight lock through taper fitting; the top of the locked nail is provided with an internal thread hole for locking taper fitting bolt, wherein the top end of the taper fitting bolt is provided with a hexagon locking groove, and the secondary tight lock of the locked nail and the locked hole of the cervical spine forward board is realized through tight lock and bulge of the taper fitting bolt in the internal thread hole of the screw cap. The transplant system realizes even and anastomotic contact of the cervical spine forward board and the cervical spine body, the doubly-locked tight nail is locked and not loose, the cervical spine is fixedly repaired without deformation, the time for recovery is fast and no sequela is remained after operation.
Description
Technical field
The present invention relates to a kind of medical orthopaedics implant, is a kind of double locking implant system that is used for fracture of cervical vertebral body, damage, pathological changes specifically, especially for fixing, the reparation of cervical vertebra the 6th, seven joint vertebral bodys.
Background technology
Human cervical spine comprises seven joint vertebral bodys, generally by anterior cervical plates two joints or more piece vertebral body is fixed when cervical spondylosis, fracture, because the particularity of cervical vertebra, to having relatively high expectations of its implant surgery, operating difficulty is bigger.Anterior cervical plates is the fixing embedded material of Wicresoft that is used for human cervical spine vertebral body bone injury, damage or other lesion, and the form that anterior cervical plates cooperates with skeleton, fixed form, surface quality etc. have directly influenced patient's skeletal growth and rehabilitation.
At present, the anterior cervical plates of implant into body is used for interfixing of two, three, four, five, six, seven joint vertebral bodys.Because the arc of anterior cervical plates length is identical, and arcual radius is about 250mm, only be applicable to second and third, four, five, six joints are interpyramidal fixing, but and fixingly between the 6th, seven joint vertebral bodys misfit fully, can cause the distortion of the 6th, seven joint vertebral bodys, cause the distortion of whole cervical vertebra, vertebral body is difficult to restore, healing time is longer, brings certain postoperative sequela to the patient, influences the normal rehabilitation of patient.
Anterior cervical plates is generally the straight plate or the arc of radian slightly, and anterior cervical plates four wings are fixed on the cervical vertebra precentrum through locking nail respectively.Loosening in order to prevent locking nail locking, the normal method that adopts is: adopt jam nut to compress the nut of adjacent two locking nails simultaneously after locking nail lock onto on the lamina of cervical vertebra, improve the locking tightness of locking nail, reduce the loosening textured bone that brings of locking, but the jam nut that adopts is less, locking inconvenience in the implant surgery, operate miss increases operating difficulty, delays operating time, if also can cause jam nut to fall in the patient body, operation danger coefficient height influences curative effect; Be that 200510066389.0 disclosed a kind of cervical vertebras that are used for are repaired internally-fixed steel plate system just like the patent No. also, the nut of screw and steel plate locking hole are sphere, and spherical contact can cause dislocation and locking to be become flexible; Pinning is screwed into the screw thread of screw head bottom, its screw thread is located in the screw rod of head bottom of screw, influence the intensity of screw, and because pinning is less, the nut of pinning does not have external screw thread, and the screw flight of pinning is more shallow, the screw-threaded coupling contact surface of the screw rod of pinning and screw head bottom is less, locking is easily skidded even is come off, and lock insecurely, can not reach the real purpose that expands and lock.
Summary of the invention
For anterior cervical plates and the cervical vertebral body form that overcomes the prior art existence misfits, the locking operation of locking nail is inconvenient, anti-loose structure is unreasonable; influence shortcomings such as the normal recovery in affected part; it is reasonable to the invention provides a kind of configuration; contact with the 6th, seven joint cervical vertebral body equilibriums; adopt the taper bolt anti-loose structure, the minimally invasive dual-locking implantation system for cervical vertebra of convenient operation.
To achieve these goals, the technical solution used in the present invention is: a kind of minimally invasive dual-locking implantation system for cervical vertebra, comprise anterior cervical plates and locking nail, the length direction of described anterior cervical plates and the cross section of width are arc, locking nail is assemblied in the lock hole on the anterior cervical plates, the tapering nut top of locking nail is provided with screw-driver slot, its technical characterictic is that the arc radius of the length direction of described anterior cervical plates is 30-50mm, preferred 35-45mm, the tapering nut of described locking nail is provided with external screw thread and external screw thread and cooperates with threaded tapering lock hole locking on the anterior cervical plates, the tapering nut top of locking nail is provided with the internal thread hole of locking taper bolt, and the top of taper bolt is provided with locking slot.
Further, the vertical locking slot of described taper bolt is hex slot or cross recess or Flos Mume groove or straight trough; The vertical screw-driver slot of described locking nail nut is cross recess or Flos Mume groove or straight trough.
Adopt above technical scheme, the beneficial effect that the present invention reaches is:
1, utilize locking nail this anterior cervical plates to be lock onto on the cervical vertebral body of corresponding joint number, the tapering locking in the thread lock hole on the external screw thread on the nut of locking nail and the anterior cervical plates cooperates, having the cross recessed nut outwards expands and realizes the once locking of locking nail and anterior cervical plates, cooperate with the internal thread hole locking at nut top through taper bolt again, the secondary locking that the locking of taper bolt in the internal thread hole of nut is expanded and realized locking nail and anterior cervical plates lock hole, the double locking of locking nail is tight, locking is firmly not loosening, the cervical vertebra fixed and repaired is indeformable, and recovery time is fast.
2, the nut of locking nail is provided with screw-driver slot, taper bolt is provided with locking slot, make things convenient for the doctor to utilize the specific purpose tool locking that is fixed during operation, locking speed is fast, locking effect is good, shorten operating time, help the successful implementation of performing the operation, avoid the manual mistiming of tightening smallclothes such as screw to be retained in the hidden danger of bringing for patient's life security in the human body.
3, this anterior cervical plates is reasonable in design, configuration more can contact with the identical equilibrium of the 6th, seven joint cervical vertebras, can make things convenient for and implement fixing between the 6th, seven joint cervical vertebras fast, need not correct and directly to install, avoid occur correcting back screw hole distortion, material structure damage, fixing situation such as instability, the stable nothing distortion of postoperative, recovery effects is good, has ensured medical safety; And engraved structure is adopted at the anterior cervical plates middle part, whole to hide the position little, makes the shielding part potential energy after the implantation obtain the adequate blood supply, effectively prevents to cause because of ischemia symptoms such as osteoporosis, help promoting the balanced growth of fracture site, reach optimum therapeuticing effect.
4, anterior cervical plates, locking nail, taper bolt all adopt pure titanium, titanium alloy material to make, its material good biocompatibility, stable mechanical property, acidproof, alkaline-resisting, decay resistance is strong, be in acid in the human body, alkali, the continuous environment that changes of salt, can guarantee its usage safety performance and service life, human body is had no side effect.
The present invention is by the nut external screw thread and the lock hole female thread tapering locking of anterior cervical plates, the double locking mode that taper bolt cooperates with the locking of locking nail nut internal thread hole of locking nail, and locking effect is good, and is easy to operate, shortens operating time, safe and reliable; It is interpyramidal fixing that arcual anterior cervical plates is specially adapted to the 6th, seven joints, the equilibrium of anterior cervical plates and cervical vertebral body is contacted, internal fixation kinetic stability is strong, easy damaged cervical vertebral body not, cervical vertebra can comparatively fast resile, can not produce the Uncomfortable feeling of postoperative, the postoperative no sequel, medical safety does not have hidden danger.
Description of drawings
Fig. 1 is the fixing mounting structure sketch map of cervical vertebra the 6th, seven joint vertebral bodys of implant system;
Fig. 2 is the anterior cervical plates structural representation of implant system;
Fig. 3 is the locking nail structural representation of implant system;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the taper bolt structural representation;
Fig. 6 is the left view of Fig. 5;
Fig. 7 is the locking nail structural representation of tight bolt with lock;
Fig. 8 is the left view of Fig. 7.
Among the figure: cervical vertebral body 1, anterior cervical plates 2, tapped lock hole 21 on the anterior cervical plates, locking nail 3, the tapering nut 31 on the locking nail, the external screw thread 32 of tapering nut, internal thread hole 33 on the locking nail nut, the screw-driver slot 34 on the locking nail, taper bolt 4, the external screw thread 41 of taper bolt, the locking slot 42 of taper bolt.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1, shown in 2 among a kind of embodiment, the above cervical vertebral body of two joints is fixedly the time, particularly the 6th, when seven joint cervical vertebral bodies 1 need fixedly, the arc radius of choosing the length direction of anterior cervical plates 2 is 40mm, make the inboard arc and the 6th of anterior cervical plates, the arc anastomosis equilibrium of seven joint vertebral bodys, be respectively equipped with tapped lock hole 21 on four wings of anterior cervical plates, anterior cervical plates 2 is corresponding with the cervical vertebral body that will repair coincide after, the lock hole 21 that passes on the anterior cervical plates by locking nail 3 lock onto anterior cervical plates on adjacent two cervical vertebral bodies, the locking nail screw portion lock onto in the cervical bone, the external screw thread 32 of the tapering nut 31 of locking nail is locked with the lock hole 21 female thread taper fit of anterior cervical plates, realizes the 6th, the interpyramidal fixed and repaired of seven joints.
Among Fig. 3,4, in order to reach the locking purpose, the tapering nut 31 of locking nail 3 is provided with external screw thread 32, and tapering nut 31 tops have screw-driver slot 34, screw screw-driver slot on the nut by specific purpose tool the tapering female thread locking on the lock hole 21 of external screw thread 32 and anterior cervical plates on the tapering nut is cooperated, reach the purpose of once locking.
Among Fig. 5,6,7,8, in order to reach the purpose of secondary locking, have internal thread hole 33 on the end face of the tapering nut 31 of locking nail, locking one taper bolt 4 in the internal thread hole 33, taper bolt 4 is provided with external screw thread 41, taper bolt 4 tops have hexagon locking slot 42, external screw thread by taper bolt cooperates with internal thread hole 33 lockings on the locking nail nut, tapering nut 31 outside realization locking nail 3 that expands in lock hole 21 of locking nail is locked with lock hole 21 secondaries on the anterior cervical plates, make the double locking of locking nail tightr, it is more firm to lock.
Claims (4)
1, a kind of minimally invasive dual-locking implantation system for cervical vertebra, comprise anterior cervical plates (2) and locking nail (3), the length direction of described anterior cervical plates (2) and the cross section of width are arc, locking nail (3) is assemblied in the lock hole (21) on the anterior cervical plates, tapering nut (31) top of locking nail is provided with screw-driver slot (34), it is characterized in that: the arc radius of the length direction of described anterior cervical plates (2) is 30-50mm, the tapering nut (31) of described locking nail is provided with external screw thread (32) and external screw thread (32) and cooperates with threaded tapering lock hole (21) locking on the anterior cervical plates (2), tapering nut (31) top of locking nail is provided with the internal thread hole (33) of locking taper bolt (4), and the top of taper bolt (4) is provided with locking slot (42).
2, minimally invasive dual-locking implantation system for cervical vertebra according to claim 1 is characterized in that: the vertical locking slot of described taper bolt (4) (42) is hex slot or cross recess or Flos Mume groove or straight trough.
3, minimally invasive dual-locking implantation system for cervical vertebra according to claim 1 is characterized in that: the vertical screw-driver slot of tapering nut (31) (34) of described locking nail is cross recess or Flos Mume groove or straight trough.
4, minimally invasive dual-locking implantation system for cervical vertebra according to claim 1 is characterized in that: the preferred 35-45mm of arc radius of the length direction of described anterior cervical plates (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100260440A CN101496733B (en) | 2009-03-17 | 2009-03-17 | Minimally invasive dual-locking implantation system for cervical vertebra |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100260440A CN101496733B (en) | 2009-03-17 | 2009-03-17 | Minimally invasive dual-locking implantation system for cervical vertebra |
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| Publication Number | Publication Date |
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| CN101496733A true CN101496733A (en) | 2009-08-05 |
| CN101496733B CN101496733B (en) | 2010-06-30 |
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| CN2009100260440A Active CN101496733B (en) | 2009-03-17 | 2009-03-17 | Minimally invasive dual-locking implantation system for cervical vertebra |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102579118A (en) * | 2012-01-20 | 2012-07-18 | 张立春 | Bridge type connector outside periosteum |
| CN104224302A (en) * | 2014-09-02 | 2014-12-24 | 浙江科惠医疗器械有限公司 | Locking bone screw with expansionstructure |
| CN110811803A (en) * | 2019-10-29 | 2020-02-21 | 四川大学华西医院 | Cervical vertebra anterior oblique transverse fixing steel plate |
| CN112869854A (en) * | 2021-03-19 | 2021-06-01 | 苏州欣荣博尔特医疗器械有限公司 | Nail plate system for anterior cervical spine |
-
2009
- 2009-03-17 CN CN2009100260440A patent/CN101496733B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102579118A (en) * | 2012-01-20 | 2012-07-18 | 张立春 | Bridge type connector outside periosteum |
| CN104224302A (en) * | 2014-09-02 | 2014-12-24 | 浙江科惠医疗器械有限公司 | Locking bone screw with expansionstructure |
| CN110811803A (en) * | 2019-10-29 | 2020-02-21 | 四川大学华西医院 | Cervical vertebra anterior oblique transverse fixing steel plate |
| CN110811803B (en) * | 2019-10-29 | 2021-12-03 | 四川大学华西医院 | Cervical vertebra anterior oblique transverse fixing steel plate |
| CN112869854A (en) * | 2021-03-19 | 2021-06-01 | 苏州欣荣博尔特医疗器械有限公司 | Nail plate system for anterior cervical spine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101496733B (en) | 2010-06-30 |
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