CN1259854A - Intervertebral implant whereof the parts can be spaced - Google Patents
Intervertebral implant whereof the parts can be spaced Download PDFInfo
- Publication number
- CN1259854A CN1259854A CN97182335A CN97182335A CN1259854A CN 1259854 A CN1259854 A CN 1259854A CN 97182335 A CN97182335 A CN 97182335A CN 97182335 A CN97182335 A CN 97182335A CN 1259854 A CN1259854 A CN 1259854A
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- China
- Prior art keywords
- limit
- intervertebral implant
- described intervertebral
- shaped
- guide cylinder
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
Abstract
The invention concerns an intervertebral implant in the form of a supporting body comprising a central crosspiece (2) and two lateral parts (3,4) integral with (2) and forming one single piece therewith. The (3,4) are arranged in two planes (5,6) extending substantially parallel to each other and separated by the (2), and can be applied, as supporting surface, on adjacent vertebral elements. The crosspiece comprises a hollow guide cylinder extending substantially parallel to the (3,4) and between them, and comprises at laest one thread. A spacing device can be inserted between the lateral parts. The intervertebral implant provides several advantages as follows: the natural lordosis radius of the spine can be specitifically restored in a patient, and this angle can be determined before the operation, thereby obtaining for the implant, used, since the implact can be dilicately screwed and in controlled manner instead of being countersunk; and a simplified operation technique in three stages can be used (also with tminial collapse) by using a guide rod.
Description
The present invention relates to a kind of by claim 1 intervertebral implant as described in the preamble.
By the known this intervertebral implant of EP-A10664994.The shortcoming of this structure is that implant and dilator are designed to one, so can only insert the intervertebral intracavity as a whole, insertion must realize by squeezing into implant.In addition, known intervertebral implant can only not expanded step by step, consequently can only inaccurately plan the angle of flare before operation.
The present invention will provide remedial measure.The objective of the invention is to create a kind of intervertebral implant, it can not have to screw under the situation of dilator the intervertebral chamber in the phase I, just in second stage just by means of a dilator that can insert implant at the intervertebral endoluminal expansion.Expansion should be able to stepless or controlledly be carried out, so allow to plan the angle of flare before operation.
The purpose that proposes in order to reach by the present invention is by means of a kind of intervertebral implant with claim 1 feature.
The guide cylinder of implant or be shaped on female thread or be shaped on external screw thread (or both).Female thread allows implant to expand by means of dilator, and dilator has a bar that has the screw thread corresponding with female thread.But the external screw thread on the guide cylinder also allows by means of dilator expansion implant, and this dilator has a hollow cylinder part that has the screw thread corresponding with external screw thread.Second kind of scheme is because diameter allows to transmit bigger pulling force than die.
Design with externally threaded guide cylinder in having has additional advantage, promptly can be a kind of operating technology that guiding is arranged.The pilot pin that is fixed in the female thread can be used to during whole surgery as the guiding assistor, and other instruments can be enclosed within above it.Operation is here undertaken by three steps basically.Implant screws in by means of a screw shell; Fragment filling implant with bone; Implant is expanded towards end plate at the intervertebral intracavity.Also can imagine an additional step, that is inject the liquid state or the gelatinous mass of stimulation of bone growth at the intervertebral intracavity.Can adopt the instrument of screw-in with holes or implantable bone fragment for this purpose.
Another design of intervertebral implant is that the outside on limit is shaped on and is arranged essentially parallel to the guiding rib that guide cylinder is extended, and it makes implant be easy to insert the intervertebral intracavity.
The limit can also be shaped on the hole, does like this to help growing of bone in the hole.For same purpose, in two planes of U-shaped supporting mass, can respectively establish two limits, wherein, put in the strut rail end on the limit, so form a cavity between two limits in each plane, bone can be grown in cavity.
The strut rail of implant preferably is symmetrical in the limit and arranges.
A kind of preferential improvement is that the inboard on implant limit is shaped on groove, and they extend transverse to guide cylinder.Do additional advantage like this, that is, when intervertebral implant is expanded, can constitute definite (mapping out before the operation) angle.
Another design of intervertebral implant is that free end has the flange that refers to inwards before its Bian Zaiqi; They prevent that the GUSUIPIAN that is filled in the implant from skidding off.
The advantage that adopts the present invention to obtain mainly is, owing to press intervertebral implant of the present invention:
-lordosis radius and this angle of recovery nature can be determined before operation with can being suitable for the patient.Created best precondition for the inside growth of implant thus;
-can be a kind of AT implanted prosthetics, because implant can mildly and controlledly screw in, rather than a kind of process of squeezing into; And
-can be (also being intrusion amount minimum) operating technology of a kind of simplification, that is be three step operating technologies by the pilot pin guiding.
The a plurality of embodiment that schematically illustrate by means of part illustrate further the present invention and of the present invention further developing below.
Accompanying drawing is represented:
Fig. 1 is by intervertebral implant perspective view of the present invention;
Fig. 2 is used for the screw shell by the intervertebral implant of Fig. 1;
Fig. 3 is used for the dilator perspective view by the band nut of the intervertebral implant of Fig. 1;
Fig. 4 is used for the dilator perspective view through the change tape screw rod by the intervertebral implant of Fig. 1;
Fig. 5 is by having inserted the intervertebral implant profile of screw shell by the present invention;
The sleeve perspective view of the modified threaded and hollow cylinder bar of Fig. 6;
Fig. 7 is by having inserted telescopic intervertebral implant profile shown in Figure 6 by the present invention;
Fig. 8 wherein is used for bone by inserting by intervertebral implant of the present invention and one part
The profile of GUSUIPIAN impacter of fragment filling supporting mass;
Fig. 9 presses the GUSUIPIAN impacter fragmentary, perspective view of Fig. 8;
Figure 10 is by by the present invention's profile of intervertebral implant and the dilator as shown in Figure 3 of having inserted as shown in Figure 1, and dilator screws in the supporting mass by means of the steering tool that is enclosed within on the pilot pin;
The fragmentary, perspective view of Figure 11 steering tool shown in Figure 10;
Figure 12 by by the modified intervertebral implant of the present invention (band shorten guide cylinder) and
Screw in the vertical section of the dilator of pressing Fig. 4 wherein; And
Figure 13 intervertebral implant front view that has screwed in dilator shown in Figure 12.
The intervertebral implant of representing among Fig. 1 is designed to the form of supporting mass 1, and it comprises central strut rail 2 and is fixed on all-in-one-piece limit 3,4 on the strut rail 2.Limit 3,4 be arranged in two mutual substantially parallel extensions and the plane 5,6 that separates by strut rail 2 in and be symmetrical in this strut rail 2, wherein, plane 5,6 can abut on the adjacent vertebral body as bearing-surface.
In two planes 5,6 of U-shaped supporting mass 1, respectively establish two limits 3; 4, here limit 3,4 is placed in strut rail 2 ends, so form a cavity 23 between two limits in each plane 5,6.
Fig. 2 represents the sleeve 9 with external screw thread 10, cavity 13 and hexagon groove 34, and it can be enclosed within on the guide cylinder 7 of supporting mass 1.Its diameter preferably is slightly larger than the height (plane 5 and 6 spacing) of supporting mass 1.The sleeve 9 that inserts in the supporting mass 1 can be by the instrument in the suitable insertion hexagon groove 34 around guide cylinder 7 rotations and be used for supporting mass 1 is inserted the intervertebral intracavity.Because sleeve 9 from the limit 3,4 the outside 24 slightly outstanding, so its portion with external threads 10 is engaged in the sclerotin of adjacent vertebral, thereby can with a wet finger supporting mass 1 be inserted the intervertebral intracavity.After supporting mass 1 was successfully inserted the intervertebral intracavity, sleeve 9 can back screw out by guide cylinder 7 equally easily again.
Fig. 3 and 4 has represented two kinds of schemes that are used to open the dilator 11 of supporting mass 1, and the both comprises an identical expansion body 18.Expansion body 18 has the rectangular parallelepiped shape of band centre bore 19, is provided with two projections 21 in the side of rectangular parallelepiped, and the latter can be inserted between the limit 3,4.In addition, expansion body 18 has two side channels 55, and they are convenient to clamp and operate this expansion body 18.
When dilator 11 alternative plans that adopt as shown in Figure 4, guide cylinder 7 must shorten, and as Figure 12 was represented, it was so long just to be roughly half that represent among Fig. 1.
Describe the operating technology of pressing intervertebral implant of the present invention in detail by means of Fig. 5 now.
After successfully having removed enough intervertebral disc material, U-shaped supporting mass 1 is inserted between the vertebra that relates to.For this purpose, will be enclosed within on the guide cylinder 7 with the sleeve 9 of external screw thread 10 as shown in Figure 5.U-shaped supporting mass 1 and the sleeve 9 that puts can be driven in the intervertebral intracavity of having handled well together easily, are engaged in the sclerotin until the first lap of external screw thread 10.Then by continuing turnbarrel 9 is screwed into U-shaped supporting mass 1 requirement at the intervertebral intracavity the degree of depth.The rotation of sleeve 9 can realize by means of a screw-in instrument that is inserted among interior six sides 34.
In the schemes of Fig. 6 and 7 expressions, the sleeve 9 of band external screw thread 10 is fixed on the bar 46 of hollow cylinder and becomes the part of insertion instrument.For the insertion instrument can be led vertically better, can in the female thread 8 of supporting mass 1 guide cylinder 7, screw in one in advance and be shaped on the pilot pin 31 of external screw thread 32 (Figure 10), and during whole surgery, stay the there at its front end.Sleeve 9 by Fig. 6 can easily be enclosed within on the guide cylinder 7 by its hollow cylinder bar 46 by pilot pin 31 and rotation there then.
The guiding rib 12 that extends on 3,4 outsides 24, limit of supporting mass 1 prevents that supporting mass 1 from departing from desired direction in the screw-in process.
Sleeve 9 screws out from supporting mass 1 again after finishing the screw-in process.Because between the inner surface of the surface of guide cylinder 7 and sleeve 9, in fact do not have frictional force, so supporting mass 1 keeps its invariant position when screwing out sleeve 9.
Now then can be by selecting in supporting mass 1 cavity 23, to import as shown in Figure 8 GUSUIPIAN 47.For this purpose, by means of GUSUIPIAN impacter 33 GUSUIPIAN 47 is imported and is pressed in the cavity 23.The GUSUIPIAN impacter 33 that Fig. 8 represents is made of flat matrix 48, and it can partly insert between the limit 3,4 as shown in Figure 8 and be fixed on the hollow cylinder bar 49.This GUSUIPIAN impacter 33 can axially be guided by pilot pin 31 equally.
At last, as shown in figure 10, dilator 11 inserted the plane 5,6 of supporting masses 1 and be arranged between the limit 3,4 in these planes.The dilator of pressing Fig. 3 11 that is in assembled state (that is nut in being contained in hole 19 26) now inserts between the limit 3,4 with two projection 21 by means of insertion instrument 40.
The front end of in Figure 11, having represented insertion instrument 40 in detail.Rotatable sleeve pipe 41 has the driving claw 50 of four nuts 26 at its front end; On nut, be processed with the cannelure 56 of four correspondences, so nut 26 can be driven in rotation for this reason.Rotatable sleeve pipe 41 is contained in the fixing sleeve 52 of being with embossing ring 53 and at its front end two fixing pins 54, and the fixing pin can insert in the lateral slot 55 (Fig. 3) of projection 21, to fix expansion body 18.
Adopt shown in Figure 4 when except that the expansion body 18 of unanimity, also comprising the dilator 11 of screw rod 14 (replacing nut 26), shown in Figure 12 and 13, in the female thread 8 of the bar 20 of screw rod 14 by its screw thread 15 screw-in hollow cylinders 7.Because the backstop 45 of screw head 16 in hole 19, the screw-in of screw rod 14 guide cylinder 7 in just impels expansion body 18 to move axially along the direction of guide cylinder 7, meanwhile makes the projection 21 that is fixed on the expansion body invade between the limits 3,4 and their are expanded.By rotary screw 14 continuously, limit 3,4 can further be expanded to till the angle α that the plane 5,6 that makes them constitutes 10-12 °.The rotation of screw rod 14 can be inserted the realization of the instrument among six sides 44 in the head 16 by means of one.
Claims (14)
1. be the intervertebral implant of a supporting mass (1) in form, it comprises central strut rail (2) and is fixed on strut rail (2) goes up all-in-one-piece limit (3,4), wherein, limit (3,4) is arranged in two extensions parallel to each other basically and passes through in the plane (5,6) of strut rail (2) partition distance, they can abut on the adjacent vertebral body as bearing-surface, it is characterized by: strut rail (2) has at least one screw thread (8 that has that is arranged essentially parallel to the limit extension between limit (3,4); 28) hollow guiding cylinder (7).
2. according to the described intervertebral implant of claim 1, it is characterized by: hollow guiding cylinder (7) or female thread (8) is arranged or external screw thread (28) is arranged.
3. according to the described intervertebral implant of claim 1, it is characterized by: hollow guiding cylinder (7) has female thread (8) and external screw thread (28).
4. according to the described intervertebral implant of one of claim 1 to 3, it is characterized by: the inboard (25) of limit (3,4) is shaped on the groove (30) that extends transverse to guide cylinder (7).
5. according to the described intervertebral implant of one of claim 1 to 4, it is characterized by: the outside (24) of limit (3,4) is shaped on and is arranged essentially parallel to the guiding rib (12) that guide cylinder (7) is extended.
6. according to the described intervertebral implant of one of claim 1 to 4, it is characterized by: the outside (24) of limit (3,4) is shaped on and is arranged essentially parallel to translot, especially fish spicule shape or the zigzag profile that guide cylinder (7) is extended.
7. according to the described intervertebral implant of one of claim 1 to 6, it is characterized by: limit (3,4) are shaped on hole (22).
8. according to the described intervertebral implant of one of claim 1 to 7, it is characterized by: in two planes (5,6) of U-shaped supporting mass (1), respectively establish two limits (3,4), wherein, put in strut rail (2) end on limit (3,4), so form a cavity (23) between two limits (3,4) in each plane (5,6).
9. according to the described intervertebral implant of one of claim 1 to 8, it is characterized by: strut rail (2) is symmetrical in limit (3,4) and arranges.
10. according to the described intervertebral implant of one of claim 1 to 9, it is characterized by: limit (3,4) have a flange that refers to inwards (29) at its preceding free end.
11. according to the described intervertebral implant of one of claim 1 to 10, it is characterized by: it also has a pilot pin (31) that can be fixed in guide cylinder (7) female thread (8).
12. according to the described intervertebral implant of one of claim 1 to 11, it is characterized by: it comprises that also one can be gone up the sleeve (9) that moves and male thread portion (10) are arranged in guide cylinder (7).
13. according to the described intervertebral implant of one of claim 1 to 12, it is characterized by: it also comprises a dilator (11) that can insert plane (5,6) and be arranged in the limit (3,4) between the limit (3,4) in these planes, wherein, dilator has a screw rod (14), and screw rod has the bar (20) that is shaped on the screw thread (15) corresponding with female thread (8).
14. according to the described intervertebral implant of one of claim 1 to 12, it is characterized by: it also comprises a dilator (11) that can insert plane (5,6) and be arranged in the limit (3,4) between the limit (3,4) in these planes, wherein, dilator has a hollow cylinder nut (26), and nut is shaped on the female thread (27) corresponding with external screw thread (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB971823359A CN1182817C (en) | 1997-08-06 | 1997-08-06 | Intervertebral implant whereof the parts can be spaced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB971823359A CN1182817C (en) | 1997-08-06 | 1997-08-06 | Intervertebral implant whereof the parts can be spaced |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1259854A true CN1259854A (en) | 2000-07-12 |
| CN1182817C CN1182817C (en) | 2005-01-05 |
Family
ID=5178403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971823359A Expired - Fee Related CN1182817C (en) | 1997-08-06 | 1997-08-06 | Intervertebral implant whereof the parts can be spaced |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1182817C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1893895B (en) * | 2003-02-12 | 2010-05-12 | 华沙整形外科股份有限公司 | Articular disc prosthesis for lateral insertion |
| CN110114040A (en) * | 2016-10-25 | 2019-08-09 | Imds公司 | The method and apparatus of Invasive lumbar fusion device expansion |
-
1997
- 1997-08-06 CN CNB971823359A patent/CN1182817C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1893895B (en) * | 2003-02-12 | 2010-05-12 | 华沙整形外科股份有限公司 | Articular disc prosthesis for lateral insertion |
| CN110114040A (en) * | 2016-10-25 | 2019-08-09 | Imds公司 | The method and apparatus of Invasive lumbar fusion device expansion |
| CN110114040B (en) * | 2016-10-25 | 2022-06-14 | 增强医疗公司 | Method and apparatus for expanding interbody fusion cage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1182817C (en) | 2005-01-05 |
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Owner name: SYNTHES AG Free format text: FORMER OWNER: SYNTHES AG CHUR Effective date: 20061201 |
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