CN201346235Y

CN201346235Y - Intervertebral merging machine

Info

Publication number: CN201346235Y
Application number: CNU2008202358105U
Authority: CN
Inventors: 曾腾辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-11-18
Anticipated expiration: 2018-12-31

Abstract

The utility model provides an intervertebral merging machine, which comprises a fixing portion which can be fixed on a vertebral bone and a merging portion whose inner portion can be filled with vertebral bone materials, wherein the fixing portion is fixed on the merging portion, and the merging portion is provided with an ultrastructure contact surface. The merging portion is arranged behind vertebral gaps, the fixing portion is fixed on the vertebral bone to fix the intervertebral merging machine. Compared with the contact surface adopted by the prior art, the embodiment of the utility model adopts the ultrastructure contact surface, which enables the merging portion to be easily placed in, does not need or only needs tiny knocking-in, is not easy to cause bony end plate injury and iatrogenic spinal cord concussion injury, and achieves the biological merging of the merging portion itself and the vertebral bone. And therefore, the technical proposal has convenient operation, higher bone merging ratio, stronger stability and less injury to bony end plates.

Description

A kind of Invasive lumbar fusion device

Technical field

This utility model belongs to orthopaedic medical treatment operation consumptive material, relates in particular to a kind of Invasive lumbar fusion device.

Background technology

Cervical vertebra degeneration, prolapse of cervical intervertebral disc, fracture of cervical vertebra are clinical very common diseases.Anterior decompression and intervertebral fusion are the Therapeutic Method of generally acknowledging.Conventional anterior plate internal fixation adds intervertebral and implants the ilium piece, and plant bone mass absorption, highly decline, plant bone mass displacement, the bad assurance of bone tile height are arranged, and gets complication such as bone district pain, infection.Fusion device between using cervical vertebra comprises first generation thread surface Invasive lumbar fusion device in recent years; The second filial generation has the square Invasive lumbar fusion device and the titanium matter cylinder mould of spinal; Third generation anatomical form degradable Invasive lumbar fusion device, it is improving the intervertebral fusion rate, is reducing patient's postoperative pain, is shortening the length of patient stay, is recovering patient's postoperative function, is reducing in the bone graft fusion and various aspects such as post-operative complication obviously are better than traditional cervical intervertebral bone grafting method.Its bone grafting amount is few simultaneously, need not increase operation and get bone groove.

But traditional Invasive lumbar fusion device can not self and vertebral body bone between biologic fusion.And isolate in intervertebral space, its shortcoming is: isolated Invasive lumbar fusion device is oppressed spinal cord once more, is shifted forward compressing stimulation esophagus, trachea to retrodisplacement, anti-rotary torsion is not enough and cause Invasive lumbar fusion device to rotate at intervertebral space, two above spinal stability deficiencies of implanting of sections, titanium cage modle Invasive lumbar fusion device must be in conjunction with the anterior plate technology, sour jujube shape double wedge causes the damage of bone soleplate and stress concentration to cause problems such as Invasive lumbar fusion device sinking, and the isolated Invasive lumbar fusion device of its root produces at the stability deficiency and the stress concentration of intervertebral space.Simple in addition Invasive lumbar fusion device can not be applied in fracture, dislocation and ligamenta intervertebralia fracture or overrelaxation's case.

The utility model content

This utility model embodiment technical problem to be solved is, a kind of Invasive lumbar fusion device is provided, can self and vertebral body bone between biologic fusion, its stability is better, stress disperses, make that operation technique is convenient, the bone fusion rate is higher, littler to the damage of bone soleplate simultaneously.

In order to solve the problems of the technologies described above, this utility model embodiment provides a kind of Invasive lumbar fusion device, comprise the fixed part that can be fixed on the vertebral body bone and the inner fusion portion that can fill bone-grafting material, described fixed part is fixed in the described fusion portion, and described fusion portion has the ultrastructure contact surface.

Merge and deploy behind intervertebral space, fixed part is fixed on the vertebral body bone, to fix this Invasive lumbar fusion device.Compare with the double wedge contact surface that prior art adopts, this utility model embodiment adopts the ultrastructure contact surface, there is not sour jujube shape double wedge can make fusion deploy easily, do not need or only need slightly to knock in, be not easy to cause damage of bone soleplate and iatrogenic spinal concussion to hinder, and realize the biologic fusion of fusion portion self and vertebral body bone.Therefore, the technical program is easy to operate, the bone fusion rate is higher, stability is stronger, and is littler to the damage of bone soleplate simultaneously.

Description of drawings

Fig. 1 is the schematic top plan view of a kind of Invasive lumbar fusion device of providing of this utility model embodiment;

Fig. 2 is the schematic side view of Fig. 1;

Fig. 3 is the front elevational schematic of Fig. 1.

The specific embodiment

See also Fig. 1 and Fig. 2, this utility model embodiment provides a kind of Invasive lumbar fusion device, comprise fixed part 1 and the inner fusion portion 2 that can fill bone-grafting material that can be fixed on the vertebral body bone, fixed part 1 is fixed in the fusion portion 2, and fusion portion 2 has ultrastructure contact surface 3.Fixed part 1 and fusion portion 2 are anatomical form designs, but fixed part 1 is when being close to anterior margin of vertebral body, and fusion portion 2 degree of depth are depth desired.

Particularly, above-mentioned fusion portion 2 cross sections are half elliptic substantially, and its opening is fixed in

fixed part

1, and 1 sealing half elliptic portion 2 forms through holes 21 by fixed part, to fill bone-grafting material.

Contact surface 3 comprises having Ultrastructural contact surface 31 and the following contact surface 32 gone up, last contact surface 31 is positioned at the upper surface of fusion portion 2, following contact surface 32 is positioned at the lower surface of fusion portion 2, and the upper and lower surface that makes fusion device 2 all can be by ultrastructure as biologic fusion between pearl micro-particle structure or sponge-type porosity structure Design and osseous tissue.

Upper and

lower contact surface

31,32 is provided with first fixing hole 33, but is equipped with first fixture 34 that vertebral body bone soleplate is gone in intercalation in first fixing hole 33.The position of upper and

lower contact surface

31,32 contiguous fixed parts 1 is respectively arranged with two first fixing holes 33 in both sides, therefore upper and

lower contact surface

31,32 is connected with vertebral body bone soleplate by eight first fixtures 34.In the present embodiment, first fixture 34 is a staple.

As shown in Figure 3, said fixing portion 1 can be steel, and holder 1 is " H " shape butterfly shape, is outward extended with four protuberances 11, and every pair of protuberance 11 forms respectively to be beneficial to installs the gap 12 that vertebral body struts bar.Be provided with second fixing hole 13 in protuberance 11, be equipped with second fixture 14 respectively on each second fixing hole 13, fixed part 1 can be fixed on the vertebra by second fixture 14.There is installation direction arrow 15 on protuberance 11 surfaces therein.In the present embodiment, second fixture 14 can screw, and correspondingly, second fixing hole 13 is a screw hole.

As shown in Figure 3, be respectively arranged with forms 16 on the fixed part 1 below gap 12, forms 16 pass whole fixed part 1, make the doctor can observe the degree of being close to of fusion portion surface and the last lower edge of vertebral body.Central authorities in fixed part 1 also are provided with screwed hole 17, are used for connecting controlling device.The both sides of fixed part 1 are provided with the switch 18 of first fixture 14, and rotary switch 18 makes first fixture 14 rise or descend, thereby realizes the on-off control of first fixture 14.

Above-mentioned fusion portion 2 can adopt medical titanium, titanium alloy, bone or degradation material etc., and it can also adopt other materials, as long as fusion portion 2 has Ultrastructural contact surface 3, all within protection domain of the present utility model.

Being applied to the prolapse of cervical intervertebral disc anterior approach with Invasive lumbar fusion device is example.Do otch after the anesthesia, appeared the art open country after, hypocentrum central authorities are screwed into and strut bar on pathological changes, strut intervertebral space, extract pathological changes gap disc tissue, remove vertebral body trailing edge hyperosteogeny, the anterior margin of vertebral body hyperosteogeny is removed in thoroughly decompression, makes anterior margin of vertebral body smooth.Cleaning endplate cartilage and preparation bone soleplate to the little oozing of blood of surface of bone, keep the complete of bone soleplate.Further strut and reduce pressure and prepare the bone soleplate.Insert the die trial of Invasive lumbar fusion device, the model of selected Invasive lumbar fusion device.Fusion portion 2 fills full of body or allosome spongy bone, beats in fact, prevents that skeletal grain from getting loose.Control Invasive lumbar fusion device with controlling device by controlling the hole,, fusion portion 2 is inserted in the intervertebral space that has strutted by the clear and definite installation direction of direction arrow on fixed part surface.Because this utility model embodiment fixed part 1 is a H butterfly shape, leave the space to strutting bar, can not influence and insert because strutting bar.Present embodiment is not because the upper and

lower contact surface

31,32 of Invasive lumbar fusion device has double wedge, and displaced is the surface of Supermicron pearl microgranule design, so insert easily, does not need or only need slightly to knock in, and is not easy to cause damage of bone soleplate and spinal concussion to hinder.Fixed part 1 is a H butterfly shape, and the interface radian meets cervical vertebra anatomical physiology, and when fixed part 1 was adjacent to cervical vertebra leading edge cortical bone, fusion portion 2 reached depth desired.The dilator Invasive lumbar fusion device that oppositely pressurizes.C type arm machine perspective is understood and is inserted object location and disc height, cervical vertebrae physiological flexibility, satisfied after, fixed part 1 is screwed into four pieces on screw, lock screw.Reverse left and right sides staple switch 90 degree clockwise, eight pieces of staples in eight staple holes of fusion portion 2 upper and lower interfaces are closed out in release, eight pieces of staple intercalations go into to go up in the hypocentrum bone soleplate, and four every reach face and fix, and further strengthen Invasive lumbar fusion device stability.Remove dilator.Last flush operation open country is placed drain and is closed otch.

In addition, this utility model embodiment can also be applied in fracture, dislocation and ligamenta intervertebralia fracture or overrelaxation etc. case.

Only taken as exemplary is and nonrestrictive for the above, and not in order to restriction this utility model, protection domain of the present utility model is set forth by claims, but not the described content of description; So and any change of work as long as it belongs in the implication and scope of claim equivalent feature, all should be contained in the scope of the present utility model.

Claims

1, a kind of Invasive lumbar fusion device comprises the fixed part that can be fixed on the vertebral body bone and the inner fusion portion that can fill bone-grafting material, and described fixed part is fixed in the described fusion portion, it is characterized in that: described fusion portion has the ultrastructure contact surface.

2, Invasive lumbar fusion device as claimed in claim 1 is characterized in that: described contact surface is provided with first fixing hole, but is equipped with first fixture that vertebral body bone soleplate is gone in intercalation in described first fixing hole.

3, Invasive lumbar fusion device as claimed in claim 2 is characterized in that: described fixed part is provided with the switch of described first fixture of control.

4, Invasive lumbar fusion device as claimed in claim 1, it is characterized in that: described contact surface comprises the last contact surface that is positioned at described fusion portion upper surface and is positioned at the following contact surface on described fusion subordinate surface, be respectively arranged with described first fixing hole and first fixture on described upper and lower contact surface.

5, Invasive lumbar fusion device as claimed in claim 1 is characterized in that: described fixed part is provided with second fixing hole, is equipped with second fixture that can be fixed on the described vertebra in described second fixing hole.

6, Invasive lumbar fusion device as claimed in claim 5, it is characterized in that: described fixed part is " H " butterfly shape, and be outward extended with four protuberances, every pair of described protuberance forms to be beneficial to installs the gap that vertebral body struts bar, and described second fixing hole is arranged on the described protuberance.

7, Invasive lumbar fusion device as claimed in claim 1 is characterized in that: described fixed part is provided with and is used to observe described fusion portion and vertebral body goes up the forms that lower edge is close to degree.

8, Invasive lumbar fusion device as claimed in claim 1 is characterized in that: described fixed part is provided with the installation direction arrow.

9, Invasive lumbar fusion device as claimed in claim 1 is characterized in that: the ultrastructure contact surface of described fusion portion is pearl micro-particle structure or sponge-type porosity structure.

10, as each described Invasive lumbar fusion device of claim 1-10, it is characterized in that: described Invasive lumbar fusion device is medical titanium, titanium alloy, bone or degradation material.