CN100431502C - Intervertebral fusion device - Google Patents

Intervertebral fusion device Download PDF

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Publication number
CN100431502C
CN100431502C CNB2005100116193A CN200510011619A CN100431502C CN 100431502 C CN100431502 C CN 100431502C CN B2005100116193 A CNB2005100116193 A CN B2005100116193A CN 200510011619 A CN200510011619 A CN 200510011619A CN 100431502 C CN100431502 C CN 100431502C
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fusion device
hollow cylinder
connecting rod
invasive lumbar
lumbar fusion
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CN1669536A (en
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王岩
张雪松
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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 present invention relates to an interverterbral fusion device. The present invention is characterized in that the interverterbral fusion device is an annular hollow cylinder from the view of the external shape; the side wall of the annular hollow cylinder is provided with an opening; the upper surface and the lower surface of the annular hollow cylinder are respectively provided with an antiskid surface structure, and the shape of each antiskid surface structure is similar to the shape of an upper interverterbral end plate and a lower interverterbral end plate; an annular hollow rectangular cylinder and a U-shaped cross section are preferred. Under the precondition of ensuring stable and durable supporting performance, the interverterbral fusion device can ensure that bone graft area and the quantity of grafted bones are more than two times of those of the interverterbral fusion device adopting a conventional structure; thus, the fusion rate of the grafted bones is greatly raised, and the problems of sedimentation and interverterbral height losses after the interverterbral fusion device is implanted are thoroughly eliminated to a great extent. Besides, the present invention also provides a thruster for thrusting the interverterbral fusion device into an interverterbral gap.

Description

Be with angle of rake Invasive lumbar fusion device
Technical field
The present invention relates to a kind of vertebra inner fixing device, particularly a kind of intervertebral fixation device specifically, relates to a kind of angle of rake Invasive lumbar fusion device of being with.
Background technology
Use the existing nearly 20 years history of Invasive lumbar fusion device treatment spinal disease, Chinese scholars research experiment for many years shows, ideal Invasive lumbar fusion device should have suitable own vol (contact area) and all wall thickness, sufficient, stable lasting support function can be provided, can provide enough spaces to fill bone graft again.
Conventional Invasive lumbar fusion device as shown in Figure 1, Invasive lumbar fusion device is separately positioned on the left and right sides of intervertebral.Invasive lumbar fusion device is cube (square box shaped) structure of a hollow, and its upper and lower surface contacts with upper and lower soleplate respectively, and to keep intervertebral height, its hollow space and two Invasive lumbar fusion device mid portions are used for bone grafting (as Fig. 2).Its sidewall is provided with several holes, is used to reduce the stress shielding to bone graft, promotes interbody bone to merge.Its upper and lower surface design becomes anti-skid structure, increases frictional resistance, prevents moving of Invasive lumbar fusion device.In addition, its rear wall is provided with the hole, and instrument easy to use (as propeller) pushes it in vertebral body.
In actual use, there are some defectives in the Invasive lumbar fusion device of general type, as implanting problems such as the sedimentation that occurs after the several years in various degree and bone fusion rate are low, finally causes intervertebral height to be lost.Studies show that in recent years, the appearance of the problems referred to above are relevant with the bone grafting amount with the bone grafting area of Invasive lumbar fusion device to a great extent, and increase bone grafting area and bone grafting amount will help to address the above problem.
Because the support performance of Invasive lumbar fusion device and bone grafting area, bone grafting amount mutual restriction, effective, persistent support performance require the perisporium of Invasive lumbar fusion device to have certain thickness, reduce the footprint pressure of Invasive lumbar fusion device and terminal plate of vertebral body; Therefore fusion rate of bone graft then requires Invasive lumbar fusion device hollow volume big preferably, increases the hollow volume simply or all wall thickness all can not thoroughly address the above problem.
Summary of the invention
The Invasive lumbar fusion device that the purpose of this invention is to provide a kind of new structure, pass through special structural design, when guaranteeing to have stable, persistent support performance, bone grafting area and bone grafting amount have been increased to greatest extent, fusion rate of bone graft is increased substantially, thoroughly solve Invasive lumbar fusion device and implant the problem that back sedimentation, intervertebral height are lost.In addition, the present invention also provides a kind of propeller, is used in operation Invasive lumbar fusion device of the present invention being pushed intervertebral space, to cooperate the use of Invasive lumbar fusion device of the present invention well.
The technical scheme of Invasive lumbar fusion device of the present invention is as follows:
A kind ofly be with angle of rake Invasive lumbar fusion device, comprise Invasive lumbar fusion device and connected propeller, Invasive lumbar fusion device is annular hollow cylinder, described annular hollow cylinder comprises upper and lower surface, header board, back plate and left and right sidewall, its upper and lower surface has the non skid matting structure, and the upper and lower soleplate of shape and intervertebral is close.The left side or the right sidewall of described annular hollow cylinder are provided with opening.
Described annular hollow cylinder is annular hollow rectangle cylinder, and its cross section is
Figure C20051001161900041
Shape.
The back plate of described Invasive lumbar fusion device is provided with and advances the hole, and described propelling pore area has female thread, and described propelling Kong Yuyi propeller connects, and described propeller comprises handle, elongated connecting rod and the joint that connects successively, and described joint can connect described propelling hole.Described propeller also is provided with the plate washer of the described annular hollow cylinder sidewall of just in time shutoff upper shed, and described plate washer is connected on the connecting rod.
Described non skid matting structure is surperficial indentation raised surface.
The material of described Invasive lumbar fusion device is titanium alloy, carbon fiber or PEEK.
The angle of rake technical scheme of the present invention is as follows:
A kind of propeller is used for above-mentioned Invasive lumbar fusion device is pushed intervertebral space, comprises the handle, elongated connecting rod and the joint that connect successively, and described joint can connect the propelling hole of described Invasive lumbar fusion device.Described propeller also is provided with the plate washer of the described Invasive lumbar fusion device annular of just in time shutoff hollow cylinder sidewall upper shed, and described plate washer is connected on the connecting rod.
Described plate washer is made up of end transverse slat connected vertically and side plate, and described transverse slat is provided with and the centre bore of connecting rod cross section with shape, and vertical sleeve is contained on the connecting rod; Described side plate is arranged on the side of connecting rod, and the side plate plane parallel is in the axis of connecting rod, and extends to the joint direction.
The design concept of Invasive lumbar fusion device of the present invention has broken through the Design Mode of traditional enclosed construction, has proposed the annular hollow cylinder structure that a kind of sidewall is provided with opening, and preferred version is that a kind of cross section is
Figure C20051001161900042
The rectangular cylinder structure of shape.Technical solution of the present invention is when guaranteeing that Invasive lumbar fusion device has stable, lasting support performance, increased bone grafting area and bone grafting amount (bone grafting area and bone grafting amount are more than 2 times of conventional structure Invasive lumbar fusion device) to greatest extent, fusion rate of bone graft is increased substantially.In addition, the cross section owing to Invasive lumbar fusion device of the present invention is
Figure C20051001161900043
Shape, its open architecture has not only reduced the stress shielding to bone graft, and three isolated bone graft area of traditional structure Invasive lumbar fusion device are changed into a large-scale bone graft area, helps bone-graft fusion.After the bone-graft fusion of overall region of the present invention, can provide more strong support at intervertebral.This shows that technical solution of the present invention has thoroughly been eliminated the problem that Invasive lumbar fusion device implantation back sedimentation, intervertebral height are lost to a great extent.
Propeller of the present invention is a kind of operation tool that is used for Invasive lumbar fusion device of the present invention is pushed intervertebral space.Because Invasive lumbar fusion device of the present invention is the annular hollow cylinder structure that a kind of sidewall is provided with opening, is unfavorable for bone grafting.Propeller of the present invention had both helped the bone grafting operation by but the plate washer of shutoff Invasive lumbar fusion device sidewall upper shed is set, and had guaranteed that again bone graft forms stable morphology in the bone grafting process.
Description of drawings
Fig. 1 is a conventional structure Invasive lumbar fusion device sketch map;
Fig. 2 is a conventional structure Invasive lumbar fusion device bone grafting sketch map;
Fig. 3 is an Invasive lumbar fusion device structural representation of the present invention;
Fig. 4 is an Invasive lumbar fusion device bone grafting area sketch map of the present invention.
Fig. 5 is a propeller structure sketch map of the present invention.
Fig. 6 is propeller and Invasive lumbar fusion device scheme of installation.
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described further.
Fig. 3 is an Invasive lumbar fusion device structural representation of the present invention.As shown in Figure 3, Invasive lumbar fusion device 1 of the present invention is the hollow rectangular cylinder of an annular, and a side of this rectangular cylinder is set to opening.Specifically, be that cross section is
Figure C20051001161900051
The rectangular cylinder of shape, left side of forming by header board 11, sidewall 13 and back plate 12 or right openings
Figure C20051001161900052
The shape column structure.
The non skid matting structure is arranged on the upper and lower surface of Invasive lumbar fusion device 1, and the frictional resistance when increase contacts with upper and lower vertebral plate prevents that it from moving at intervertebral.The non skid matting structure on described upper and lower surface is meant rule or irregular rough surface, furtherly, refer to that the surface is the surface of detent projection, furtherly, refer to that the surface is the raised surface of falling the zigzag, with prevent better Invasive lumbar fusion device 1 to rear side with outside side shifting.
Invasive lumbar fusion device 1 back plate 12 is provided with and advances hole 14.In the present embodiment, advance hole 14 to have female thread, by the propeller that is threaded.Described propeller is the operating theater instruments that in the operation Invasive lumbar fusion device 1 is advanced intervertebral.
The present invention adopts the material manufacture that has the good biological mechanical property, is fit to the medical science use, as metal, plastic material.Preferable material is titanium alloy, carbon fiber or PEEK.
Invasive lumbar fusion device of the present invention has been broken through the Design Mode of traditional enclosed construction, utilizes cross section to be
Figure C20051001161900053
The rectangular cylinder structure of shape when guaranteeing that Invasive lumbar fusion device has stable, lasting support performance, has increased bone grafting area and bone grafting amount to greatest extent.With common structural parameters is example, and Invasive lumbar fusion device length and width and height are respectively 25mm, 9mm and 9mm, wall thickness 3mm.Calculating shows that bone grafting area of the present invention and bone grafting amount are more than 2 times of conventional structure Invasive lumbar fusion device.
In addition, the cross section owing to Invasive lumbar fusion device preferred version of the present invention is Shape, its open architecture has not only reduced the stress shielding to bone graft, and three isolated bone graft area of traditional structure Invasive lumbar fusion device are changed into a large-scale bone graft area 15, as shown in Figure 4.From the biomechanics angle analysis, mechanical characteristic, contact performance and stability that the whole bone of intervertebral supports all are better than disperseing bone, after the bone-graft fusion, can provide more strong support at intervertebral.Therefore the present invention is merged for interbody bone and is supported and built best biomechanics environment, has farthest eliminated the problem that Invasive lumbar fusion device implantation back sedimentation, intervertebral height are lost.
Fig. 5 is the angle of rake structural representation of the present invention.Specifically, propeller of the present invention is a kind of operation tool that is used for Invasive lumbar fusion device of the present invention is pushed intervertebral space.As shown in Figure 5, propeller 2 of the present invention is made up of the handle 23, elongate connecting rod 22 and the joint 21 that connect successively, and joint 21 has the external screw thread that advances hole 14 female threads coupling with Invasive lumbar fusion device.In actual use, with advancing being spirally connected of hole 14 propeller 2 and Invasive lumbar fusion device 1 are linked into an integrated entity, realize Invasive lumbar fusion device 1 is advanced the operation of intervertebral space by joint 21.For the opening on its sidewall of shutoff in the process that is pushed into intervertebral space at Invasive lumbar fusion device 1, propeller 2 of the present invention also is provided with plate washer 24.
In the present embodiment, plate washer 24 is made up of transverse slat 241 and side plate 242 that the edge connects, vertical or approaching vertical setting the in two planes.Described transverse slat 241 is provided with and the centre bore of connecting rod 22 cross sections with shape, and vertical sleeve is contained on the connecting rod 22, and described side plate is arranged on the side of connecting rod 22, and its plane parallel is in the axis of connecting rod 22, and extends joint 21.When propeller 2 and Invasive lumbar fusion device 1 link together, give prominence to the opening on the side plate 242 of joint 21 fronts just in time can shutoff Invasive lumbar fusion device 1 sidewall.
Because plate washer 24 is to be socketed on the connecting rod 22, so plate washer 24 can rotate on connecting rod 22 or slide, can change very easily and block direction, the Invasive lumbar fusion device of left side opening or right openings all is suitable for.Plate washer 24 can adopt has certain elastic metal or nonmetallic slices, utilizes its elasticity can play the effect of shutoff opening preferably.
Operation practical operation step can clearly illustrate that the structure of propeller 2.
(1) rotatable propeller 2, and joint 21 precessions are advanced in the hole 14, and propeller 2 and Invasive lumbar fusion device 1 are linked into an integrated entity, and make the just in time opening on shutoff Invasive lumbar fusion device 1 sidewall of plate washer 24 outstanding on the propeller 2, as shown in Figure 6;
(2) in the cavity of Invasive lumbar fusion device 1, fill bone graft;
(3) grip propeller 2, Invasive lumbar fusion device 1 is pushed intervertebral space;
(4) rotatable propeller 2, and joint 21 is screwed out from advance hole 14, cancel the shutoff of 24 pairs of Invasive lumbar fusion device 1 sidewall openings of propeller plate washer.
The effect of described plate washer 24 shutoff Invasive lumbar fusion devices 1 sidewall upper shed is mainly reflected in before Invasive lumbar fusion device 1 is pushed into intervertebral space, make the hollow space of Invasive lumbar fusion device 1 become the sealing ducted body, be beneficial to the bone grafting operation, and guarantee that bone graft forms stable morphology in the bone grafting process.In fact, in case after Invasive lumbar fusion device 1 is pushed into intervertebral space, human body intervertebral fascia will play the effect of keeping the bone grafting form.
More than technical scheme of the present invention is illustrated, but in any form the present invention is not made restriction.Should be pointed out that for a person skilled in the art, can also make a lot of relevant distortion and improvement according to guiding theory of the present invention, but these all will fall into protection scope of the present invention.

Claims (4)

1, a kind ofly is with angle of rake Invasive lumbar fusion device, comprise Invasive lumbar fusion device and connected propeller, described Invasive lumbar fusion device is annular hollow cylinder, described annular hollow cylinder comprises upper and lower surface, header board, back plate and left and right sidewall, and its upper and lower surface has the non skid matting structure, the upper and lower soleplate of shape and intervertebral is close, the left side or the right sidewall of described annular hollow cylinder are provided with opening, and described annular hollow cylinder is the rectangle hollow cylinder, and its cross section is
Figure C2005100116190002C1
Shape, described back plate is provided with and advances the hole; Described propeller comprises handle, elongate connecting rod and the joint that connects successively, and described joint can connect described propelling hole; It is characterized in that, described propeller also is provided with the plate washer of just in time shutoff annular hollow cylinder sidewall upper shed, and described plate washer one end is fixed on the described connecting rod, and described plate washer is made up of transverse slat and side plate, described transverse slat is arranged to vertical with side plate or near vertical, is connected by the edge; Described transverse slat is provided with and the centre bore of connecting rod cross section with shape, and vertical sleeve is contained on the connecting rod; Described side plate is arranged on the side of connecting rod, and the side plate plane parallel is in the axis of connecting rod, and extends to the joint direction.
2, as claimed in claim 1ly be with angle of rake Invasive lumbar fusion device, it is characterized in that described non skid matting structure is surperficial indentation raised surface.
3, as claimed in claim 1 or 2ly be with angle of rake Invasive lumbar fusion device, it is characterized in that the material of described Invasive lumbar fusion device is titanium alloy, carbon fiber or PEEK.
4, a kind of propeller, comprise the handle, elongate connecting rod and the joint that connect successively, described joint can connect and is arranged on the propelling hole on the plate behind the annular hollow cylinder, described annular hollow cylinder comprises upper and lower surface, header board, back plate and left and right sidewall, and its upper and lower surface has the non skid matting structure, the upper and lower soleplate of shape and intervertebral is close, the left side or the right sidewall of described annular hollow cylinder are provided with opening, and described annular hollow cylinder is the rectangle hollow cylinder, and its cross section is
Figure C2005100116190002C2
Shape; It is characterized in that, described propeller also is provided with the plate washer of the described annular hollow cylinder sidewall of just in time shutoff upper shed, and described plate washer one end is fixed on the described connecting rod, and described plate washer is made up of transverse slat and side plate, described transverse slat is arranged to vertical with side plate or near vertical, is connected by the edge; Described transverse slat is provided with and the centre bore of connecting rod cross section with shape, and vertical sleeve is contained on the connecting rod; Described side plate is arranged on the side of connecting rod, and the side plate plane parallel is in the axis of connecting rod, and extends to the joint direction.
CNB2005100116193A 2005-04-22 2005-04-22 Intervertebral fusion device Expired - Fee Related CN100431502C (en)

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CN100431502C true CN100431502C (en) 2008-11-12

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103142331B (en) * 2013-02-26 2016-01-06 广州聚生生物科技有限公司 Extensive region pivot Lateral mass joint fusion device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6033438A (en) * 1997-06-03 2000-03-07 Sdgi Holdings, Inc. Open intervertebral spacer
US20030040799A1 (en) * 2001-01-22 2003-02-27 Boyd Lawrence M. Modular interbody fusion implant
CN1436518A (en) * 2002-02-08 2003-08-20 成都迪康中科生物医学材料有限公司 Interverterbral fusion implement
CN2627996Y (en) * 2003-08-01 2004-07-28 山西奥瑞生物材料有限公司 Intervertebral fusion device
CN2693184Y (en) * 2004-03-15 2005-04-20 王建华 Intervertebral merge appliance

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6033438A (en) * 1997-06-03 2000-03-07 Sdgi Holdings, Inc. Open intervertebral spacer
US20030040799A1 (en) * 2001-01-22 2003-02-27 Boyd Lawrence M. Modular interbody fusion implant
CN1436518A (en) * 2002-02-08 2003-08-20 成都迪康中科生物医学材料有限公司 Interverterbral fusion implement
CN2627996Y (en) * 2003-08-01 2004-07-28 山西奥瑞生物材料有限公司 Intervertebral fusion device
CN2693184Y (en) * 2004-03-15 2005-04-20 王建华 Intervertebral merge appliance

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