CN2555789Y

CN2555789Y - Self-locking inserted fusion fixator of vertebra

Info

Publication number: CN2555789Y
Application number: CN 02217722
Authority: CN
Inventors: 黄淦堂
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-28
Filing date: 2002-05-28
Publication date: 2003-06-18
Anticipated expiration: 2012-05-28

Abstract

The utility model relates to a self-locked penetrating-type vertebrae fusion fixer. The currently-used TFC still has advantages of such as flexibility and movement after surgery of patients of osteoporosis and sometimes flexibility and movement of TFC screw thread device. The utility model discloses a self-locked penetrating-type vertebrae fusion fixer, which mainly comprises a big-head screw-shape hollow metal tube (1), a hollow screw (3) connected with the screw-shape hollow metal tube (1), and a screw slip (2) connected to the top of the screw-shape hollow metal tube (1). When penetrating into vertebrae, a tube fixation with two big ends and small middle part is formed. Compared with traditional TFC bone grafting and fusing operation, the utility model simplifies operation and improves firmness in a further step.

Description

Self-locking plug-in type vertebral fusion holder

Technical field

This utility model relates to vertebral body fixed apparatus technical field, is specifically related to a kind of self-locking plug-in type vertebral fusion holder.

Background technology

In field of spinal surgery, cervical vertebra, lumbar vertebra often need be done the stability treatment, for example implant fixedly equipment special between the vertebral body of cervical vertebra, lumbar vertebra, and vertebral body is carried out the stability treatment.

The unsteady internal fixation treatments of vertebral body such as modern lumbar vertebra, cervical vertebra have roughly experienced following three developmental stage: what one, at first use is the most traditional bone-graft fusion technology, but the postoperative short-term poor stability that should perform the operation needs long period bed or plaster corset to fix more than 3 months.Two, occurred apparatus internal fixation such as various screws, steel plate subsequently again and added bone graft fusion, the immediate postoperative stability of this operation is good, but it was at 2 years loosening, broken nails of left and right sides Yi Fasheng metal implant, thus often use bone-graft fusion by adding, at a specified future date stable to guarantee; Also have, the postoperative of this operation need undergo surgery about 2 years again, removes metal internal fixation implant.Three, afterwards abroad again the someone bring into use spiral interbody bone-grafting interfusion device (Threaded Fusion Cage), be called for short TFC, fixing and the bone-graft fusion of this new technique storage tool is an one, is to treat one of unsettled effective method such as cervical vertebra, lumbar vertebra at present.TFC is a kind of cylindric, screw thread is arranged outward, interior hollow and the porous titanium alloy apparatus of sidewall, its outer field screw thread has fixation preferably, and immediate postoperative stability is good, but patient's early ambulation, and the hollow tubular of TFC, the sidewall porous, the broken bone piece in the pipe of packing into can be by the porous of sidewall, the normal bone tissues outer with pipe has fusion preferably, so just guaranteed the lumbar vertebra stablizing effect in postoperative long term.After entering the nineties, TFC is because of its good braking, fixing and fusion, and this technology is approved by orthopaedics is clinical that gradually application also begins day by day extensively, popularizes.Yet TFC commonly used at present still has its deficiency, awaits improvements, and as loosening, the displacement of sufferers of osteoporosis face postoperative TFC, displacement, loosening also may appear screwing out in the screw device of TFC itself sometimes.This displacement, loosening even can cause severe complications such as spinal cord or root compression influences therapeutic effect.

Summary of the invention

The purpose of this utility model just is to change the deficiency of the spiral interbody bone-grafting interfusion device (Threaded Fusion Cage) of present use, a kind of novel self-locking plug-in type vertebral fusion holder (Inserted Fusion Cage with Locking) is provided, is called for short IFCL.

A kind of novel self-locking plug-in type vertebral fusion holder Inserted Fusion Cage with Locking (IFCL) that this utility model provides mainly comprises the tubular metal thing of a hollow, and the one head expands, and is screw-like, an available block screw sealing; The inflatable pressurization in other end, available compressive hollow screw sealing; Form a two after inserting it between vertebral body and expand, middle little tubulose is fixed, just as being fixed on the setscrew on the wall.Center side wall at described tubular metal thing is provided with reinforcement stem and the expansion slot that longitudinal type moves towards, and like this, has extremely strong anti-rotation performance after fixing between vertebral body.

A kind of self-locking plug-in type bone-graft fusion device (IFCL) purpose that this utility model provides just is to keep the bone-graft fusion effect of traditional TFC, further simplifies operation technique, improves constant intensity.Compare with traditional TFC, IFCL has following advantage at least:

At first, change TFC commonly used and be threaded into installation, adopt directly and insert, operation is simplified easy to operate.

Secondly, this utility model damage is little, has self-locking device, and the IFCL that this utility model provides is a kind of one and expands (screw-like), and the inflatable pressurization in other end is inserted between vertebral body the back and formed a two and expand, and middle little tubulose is fixed.Just as being fixed on the setscrew on the wall, its constant intensity and stability definitely are higher than the TFC of the formula of being threaded into.

At last, the sidewall of the IFCL that this utility model provides is provided with the reinforcement stem and the expansion slot of longitudinal type trend, and IFCL has extremely strong anti-rotation performance after fixing between vertebral body, and it is incomparable that this also is threaded into TFC.

Also have, the IFCL that this utility model provides is hollow devices except that the nut of top, can insert the bone grafting fragment equally, compares with the TFC that uses always, and the bone-graft fusion effect is never inferior.

The IFCL top that this utility model provides is a female thread, after hollow bulb is filled the bone grafting fragment, screws in the top nut, can push more than about 3mm downwards, the bone grafting fragment is outwards pushed by the sidewall hole slot, play the effect of pressurization bone grafting, more help improving fusion rate of bone graft at a specified future date.

After the IFCL that this utility model provides is fixing, the compressive hollow screw of an end for screwing in, an end has improved the intensity at IFCL two ends for the block screw, has strengthened the IFCL axial load, anti-bending strength.

In sum, a kind of self-locking plug-in type vertebral fusion holder (IFCL) of providing of this utility model mainly is applicable to the interbody bone graft converged fixed on anterior cervical vertebrae, lumbar vertebral posterior or the preceding road of lumbar vertebra in the field of spinal surgery.The selected material of this IFCL is in the long-term implant into body of permission state approval or that meet the U.S. FDA standard and the good metal material of bio-compatible, as titanium alloy (Titranium alloy).

Below, with embodiment this utility model is further described in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is for being usually used in the surgical state reference diagram of the screw-in Invasive lumbar fusion device (Threaded Fusion Cage) of converged fixed between vertebral body at present, hereinafter to be referred as TFC.

The operation reference diagram of the self-locking plug-in type Invasive lumbar fusion device that Fig. 2 provides for this utility model (InsertedFusion Cage with Locking) is hereinafter to be referred as IFCL.

Fig. 3 is a combination assembling reference diagram of the present utility model.

Fig. 4 is a user mode reference diagram of the present utility model.

The screw sample tubular metal thing partial structurtes cutaway view that Fig. 5 provides for this utility model.

Fig. 6 is the vertical view of Fig. 5.

Fig. 7 is the upward view of Fig. 5.

The IFCL erector equipment structure sketch map that Fig. 8 provides for this utility model.

Specific embodiments

As shown in Figure 1, the spiral interbody bone-grafting interfusion device (ThreadedFusion Cage) that uses is called for short TFC at present.TFC is the tubular metal thing of forefinger minor details size, its outer wall is the coarse silk stricture of vagina, the sidewall porous, and spinal surgery is usually used in the screw-in Invasive lumbar fusion device of converged fixed between vertebral body both at home and abroad, performed the operation between two lumbar vertebras as shown in FIG. and inserted a TFC, another TFC is just preparing to insert.

Shown in Fig. 2-7, this utility model provides a kind of self-locking plug-in type Invasive lumbar fusion device (Inserted Fusion Cage with Locking), be called for short IFCL, as we know from the figure, this utility model mainly comprises the screw sample hollow metal tubulose thing 1 that a head expands, the screw sheet 2 that one hollow screw 3, that can link to each other with described screw sample hollow metal tubulose thing 1 bottom can link to each other with described screw sample hollow metal tubulose thing 1 top.

As shown in Figure 3, on the center side wall of the screw sample hollow metal tubulose thing 1 described in a kind of self-locking plug-in type Invasive lumbar fusion device that this utility model provides (Inserted Fusion Cage with Locking) plurality of big 6 is arranged, generally with 3-6 for well, this utility model has 4 macropores 6, and its plant bone mass that mainly is beneficial in the IFCL pipe of operation back merges with the pipe dermoskeleton; On described center side wall, be added with 4 and strengthen stem 5, to guarantee the tube wall strength of IFCL; Some expansion slots 7 are arranged at screw sample hollow metal tubulose thing 1 bottom at described IFCL, generally with 4-12 for well, this utility model has 8 expansion slots 7, expansion self-locking when it is beneficial to hollow screw 3 screw-ins of described screw sample hollow metal tubulose thing 1 bottom.

In addition, the inboard tube wall in described screw sample hollow metal tubulose thing 1 bottom has screw thread 9, for screwing in compressive hollow screw 3.Also have, the screw thread 4 that inboard tube wall is arranged on described screw sample hollow metal tubulose thing 1 top, screw in block screw sheet 2 when finishing for operation, and the diameter of described screw sample hollow metal tubulose thing 1 head is greater than mid portion, guarantee that forming a two after IFCL inserts between vertebral body expands, middle little tubulose is fixed, as shown in Figure 4.

Also have, as shown in Figure 3, hollow screw 3 intermediate hollows that this utility model provides, and also have 4-6 aperture 8 aside, after the bone grafting fragment is inserted in operation like this, to compare with the TFC that uses always, the bone-graft fusion effect is better.

Shown in accompanying drawing 5-7, hollow in the middle of the screw sample hollow metal tubulose thing 1 that this utility model provides, can insert the bone grafting fragment, described screw sample hollow metal tubulose thing 1 inside top has female thread 4, after hollow bulb is filled the bone grafting fragment, screws in top nut 2, described top nut 2 can push more than about 3mm downwards, the bone grafting fragment is outwards pushed by described sidewall hole slot 6, play the effect of pressurization bone grafting, more help improving fusion rate of bone graft at a specified future date.In described screw sample hollow metal tubulose thing 1 bottom some expansion slots 7 are arranged, identical female thread 9 is also arranged, expansion self-locking when its hollow screw 3 that is beneficial to described screw sample hollow metal tubulose thing 1 bottom screws at the internal layer of described expansion slot 7.

Below, in conjunction with the accompanying drawings how this utility model is installed IFCL and used equipment is further introduced:

As shown in Figure 8, the installation equipment of a kind of self-locking plug-in type Invasive lumbar fusion device that this utility model provides (Inserted Fusion Cage with Locking) mainly comprises: a trocar sheath 11,4 dentations are arranged at its bottom, can with the groove coupling chucking at screw sample hollow metal tubulose thing 1 top of above-mentioned IFCL; Also have an inner sleeve 12, after above-mentioned trocar sheath 11 tightens with IFCL, described inner sleeve 12 is inserted trocar sheaths 11, the inner thread of described inner sleeve 12 vertical outer wall threads and IFCL screws; Have one described inner sleeve 12 tops tighten up nut 13, after described inner sleeve 12 installs, tighten up the described nut 13 that tightens up, above-mentioned internal and external casing is more closely combined with IFCL.

Center in the IFCL bottom that this utility model provides is interior hexagonal, and sidewall has the hollow screw 3 in 4 holes; Also has the hexagon bottle opener 10 that is complementary with described hollow screw 3, be inserted into described inner sleeve 12 backs and screw in hollow screw 3, wouldn't screw expansion, insert then in the hole pre-drilled between vertebral body, after confirming that the IFCL installation site is satisfied, IFCL is screwed expansion, reach the firm purpose of locking.

The final form of IFCL provided by the utility model when operation finishes, promptly IFCL is two and expands, and is middle smaller, is difficult for the lock-out state to the two ends displacement.

Claims

1, a kind of self-locking plug-in type vertebral fusion holder, it is characterized in that this holder mainly comprises the screw sample hollow metal tubulose thing (1) that a head expands, one hollow screw (3) that can link to each other with described screw sample hollow metal tubulose thing (1) bottom, the one screw sheet (2) that can link to each other with described screw sample hollow metal tubulose thing (1) top, the diameter of described screw sample hollow metal tubulose thing (1) head is greater than mid portion, some expansion slots (7) are arranged at described screw sample hollow metal tubulose thing (1) bottom, can form a two after it inserts between vertebral body and expand, middle little tubulose is fixed.

2, a kind of self-locking plug-in type vertebral fusion holder according to claim 1 is characterized in that on the center side wall of described screw sample hollow metal tubulose thing (1) plurality of big (6) being arranged, and is added with on described center side wall and strengthens stem (5).

3, a kind of self-locking plug-in type vertebral fusion holder according to claim 1, it is characterized in that described inboard tube wall in described screw sample hollow metal tubulose thing (1) bottom has female thread (9), for screwing in compressive hollow screw (3), the screw thread (4) that inboard tube wall is arranged on described screw sample hollow metal tubulose thing (1) top is for screwing in block screw sheet (2).

4, a kind of self-locking plug-in type vertebral fusion holder according to claim 1 is characterized in that described hollow screw (3) intermediate hollow, and also has some apertures (8) aside.

5, a kind of self-locking plug-in type vertebral fusion holder according to claim 1 is characterized in that described screw sheet (2) can push more than about 3mm downwards, and the bone grafting fragment is outwards pushed by described sidewall hole slot (6).