CN208808625U - A kind of inner fixing device for the preceding road treatment of Thoracolumbar disk - Google Patents

Abstract

The utility model discloses a kind of inner fixing devices for the preceding road treatment of Thoracolumbar disk, applied on a section Thoracolumbar disk of lesion, the convex edge at its axial both ends of the surface and centrum both ends abuts against, the device includes: two fixed plates disposed in parallel, there is the radian to match with centrum physiological camber, the fixed plate is equipped with the fixation hole for wearing screw on the inside of the fixed plate；For connecting the connecting plate in the middle part of two fixed plates between two fixed plates, the connecting plate is in separate structure, the first connecting portion and second connecting portion being superposed including one end；And the sticking department at the superposition of first connecting portion and second connecting portion, for locking first connecting portion and second connecting portion, the sticking department are made of degradable material.The device is treated suitable for compression fracture, is able to maintain that the height of lesion centrum, and restore the biomechanics characteristic of centrum.

Description

A kind of inner fixing device for the preceding road treatment of Thoracolumbar disk

Technical field

The utility model relates to orthopedic medical device technical fields more particularly to a kind of in the treatment of Thoracolumbar disk preceding road Fixed device.

Background technique

The surgical interventions such as thoracolumbar fracture, regression, malformation correction have been that orthopedics circle is adopted extensively, anterior plate fixing means With its significant clinical characters, still become clinical key content in recent years.

Wherein compression fracture, the reception and registration violence mainly from head, sufficient direction makes backbone, and hyperflexion is formed suddenly, Since the buckling position of backbone is injured, external force focuses on a centrum front, while the extruding by upper and lower centrum again, therefore the vertebra Body is wedge shaped by compression, and rearward displacement, damages spinal cord or cauda equina nerve.If influence tractus corticospinalis lateralis or toe-in, Then there is spastic paraplegia, when influencing spinal cord anterior horn cell or cauda equina nerve, then generates flaccid paraplegia, lower limb feeling disappears It loses.

The purpose of operative treatment is to release spinal nerve compressing, and correct deformity simultaneously restores spinal stability, is suitable for not Stable type spine fracture, Vertebral Compression are more than that 1/2 or more, lopsided angle is greater than 20 °.Operation method, which has, fixes skill in posterior Pedicle Art, preceding road operation, spinal nerve decompression operation etc. after chest and abdomen operation, side pleuroperitoneum.

Preceding road bone grafting and interior fixation can provide strong support for backbone pre-structure, and backbone is made to restore enough stabilizations Property.Preceding road intervertebral fusion is compared with Posterior Fusion, and biggish contact surface and blood supply abundant provide even more ideal between centrum Implant bed, thus fusion has higher success rate, and after posterior fusion failure, anterior stabilization art often becomes more is managed Think even unique selection.

In existing anterior approach, it is that the corresponding Waist disc of the Thoracolumbar disk and the section that will be compressed or more is extractd, then exists Barrel-shaped netted titanium cage is implanted at the centrum of defect, then using the steel plate (hole big and lack) of valve shape or screw by titanium cage with it is upper, Lower two section centrums are fixed, and steel plate or screw will not generally further take out.But since the intensity of steel plate is greater than human body bone, so that steel Plate changes the elasticity modulus of centrum, results in the transformation for closing on interverbebral disc.And which needs on adjacent good centrum Fixing glue is squeezed into, and takes out Waist disc, has damaged original centrum.

In addition, fixed dress in a kind of anterior lumbar as disclosed in Chinese utility model patent ZL201520028187.6 Set, the inner fixing device when in use, through minimally invasive means between the upper and lower two sections adjacent lumbar vertebrae of lesion lumbar vertebrae (L5-S1) Setting support helps its recovery for lesion lumbar decompression.The utility model is minimally invasive non-for the purpose of retaining original interverbebral disc Integration technology, main purpose are by reducing stress of the segment the L5-S1 degeneration intervertebral disc in lumbar vertebrae mass motion, maintaining Intervertebral height and the motor function for moderately retaining the segment interverbebral disc.The inner fixing device is only used for solving Lumbar Intervertebral Disc Degeneration institute The slight illness of cause is not suitable for vertebral fracture, and equally limits creeping for periosteum.

Utility model content

It is suitable for compression fracture the technical problem to be solved by the utility model is to provide one kind to treat, is able to maintain that disease Become the height of centrum, and restore the biomechanics characteristic of centrum, does not sacrifice the one kind for closing on interverbebral disc for Lu Zhi before Thoracolumbar disk The inner fixing device for the treatment of.

In order to solve the above technical problems, technical solution adopted in the utility model is:

A kind of inner fixing device for the preceding road treatment of Thoracolumbar disk, which is characterized in that the device is applied to a section of lesion On Thoracolumbar disk, the convex edge at axial both ends of the surface and centrum both ends is abutted against, which includes:

Two fixed plates disposed in parallel, the fixed plate inside has the radian to match with centrum physiological camber, described Fixed plate is equipped with the fixation hole for wearing screw；

For connecting the connecting plate in the middle part of two fixed plates between two fixed plates, the connecting plate is in separate structure, including The first connecting portion and second connecting portion that one end is superposed；And

Lock at the superposition of first connecting portion and second connecting portion, for locking first connecting portion and second connecting portion Determine portion, the sticking department is made of degradable material.

Further technical solution sign is that the sticking department includes lock-screw.

Further technical solution sign is that the sticking department includes locking column and matched locking cap, the lock Fixed column is equipped with locking screw, and the outside vertical of the locking column and first connecting portion is fixed, opened up in the second connecting portion There is the opening portion that locking column can be made to pass through.

Further technical solution sign is that the diameter of the sticking department is 2.0~6.5mm.

Further technical solution sign is that the opening portion is in the strip-shaped hole that locking column can be made to slide inside it.

Further technical solution sign is that the diameter of the fixation hole is 2.0~6.5mm, is spaced in same fixed plate It is provided with 3~5 fixation holes.

Further technical solution sign is that the fixation hole includes universal hole, is equipped in the universal hole for locking The cardo ring of screw.

Further technical solution sign is that the sticking department is made of poly-lactic acid material.

Further technical solution sign is that the fixed plate and connecting plate are all made of titanium alloy material and are made.

Further technical solution sign is that the inner side end of the fixed plate is equipped with for enhancing itself and centrum binding force Tooth.

The beneficial effects of adopting the technical scheme are that

(1) application of the inner fixing device, so that the notch of Thoracolumbar disk anterior approach contracts from 35cm of traditional operation or so It is small to arrive 6cm or so, reduce the pain of patient；

(2) inner fixing device is fixed on the centrum of lesion, and its axial both ends of the surface and lesion centrum both ends Convex edge abuts against, and by the pyramidal support of compression, not only remains original centrum, supports, and ensure that lesion centrum axis To maximum length, to maintain stable vertebral height；

(3) inner fixing device is suitable for the treatment of centrum regression and compressive deformation, and application does not damage adjacent centrum And interverbebral disc, the damage to centrum is reduced, the motor function of the segment or more interverbebral disc is remained；

(4) setting of sticking department ensure that the intensity of the inner fixing device within a certain period of time, enable the centrum of lesion Enough to restore, after a period of time, sticking department degradation is absorbed, and is relieved limitation of the steel plate to centrum, has been restored the Biological Strength of centrum Learn characteristic.

Detailed description of the invention

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the schematic view of the front view of the utility model；

Fig. 3 is the left view structural representation of the utility model.

Specific embodiment

Below with reference to the attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear Chu is fully described by, it is clear that described embodiment is a part of the embodiment of the utility model, rather than whole implementation Example.Based on the only embodiment in the utility model, those skilled in the art are obtained without making creative work The every other embodiment obtained, fall within the protection scope of the utility model.

Many details are explained in the following description in order to fully understand the utility model, but this is practical new Type can also be implemented using other than the one described here other way, and those skilled in the art can be without prejudice to this reality With doing similar popularization in the case where novel intension, therefore the utility model is not limited by the specific embodiments disclosed below.

As shown in FIG. 1 to 3, a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk, the device are applied to lesion On one section Thoracolumbar disk, the convex edge at axial both ends of the surface and centrum both ends is abutted against.Suitable for centrum regression and compressive deformation Treatment, application do not damage adjacent centrum and interverbebral disc, reduce the damage to centrum, remain segment interverbebral disc up and down Motor function.

Specifically the device includes:

Two fixed plates 1 disposed in parallel have the radian to match with centrum physiological camber, institute on the inside of the fixed plate 1 Fixed plate 1 is stated equipped with the fixation hole 11 for wearing screw.The fixed plate 1 is fixed on lesion by orthopaedics screw special On lumbar vertebrae.

For connecting the connecting plate 2 at two fixed plates, 1 middle part between two fixed plates 1, the connecting plate 2 is in separate structure, The first connecting portion 21 and second connecting portion 22 being superposed including one end；And

At the superposition of first connecting portion 21 and second connecting portion 22, it is used for first connecting portion 21 and second connecting portion 22 The sticking department 3 of locking, the sticking department 3 are made of degradable material.

The inner fixing device in application, first by the pyramidal support of compression, and takes out broken bone in anterior approach, inserts titanium cage Or artificial bone support, the inner fixing device is then placed on centrum side, the end face of two fixed plates 1 is made to resist corresponding lesion Then medical fixing screws are squeezed into the convex edge at centrum both ends in fixation hole 11, fix the inner fixing device with cone.? Installation initial stage, the setting of sticking department 3 ensure that the intensity of the inner fixing device, and the centrum of lesion is restored, at one section Between after, sticking department 3 degradation be absorbed, relieve limitation of the steel plate to centrum, restored the biomechanics characteristic of centrum.

The application of the inner fixing device, so that the notch of Thoracolumbar disk anterior approach is narrowed down to from the 35cm or so of traditional operation 6cm or so reduces the pain of patient.The inner fixing device is fixed on the centrum of lesion, and its axial both ends of the surface with The convex edge at lesion centrum both ends abuts against, and by the pyramidal support of compression, not only remains original centrum, supports, and protects The maximum length of lesion centrum axial direction is demonstrate,proved, to maintain stable vertebral height.

For sticking department 3, specific sticking department 3 includes lock-screw；Either sticking department 3 include locking column 31 and and its Matched locking cap 32, the locking column 31 are equipped with locking screw, and the locking column 31 and the outside of first connecting portion 21 are hung down It is straight fixed, the opening portion 221 that locking column 31 can be made to pass through is offered in the second connecting portion 22.Two kinds of equal energy of fixed form It is enough to meet the purpose of first connecting portion 21 and the connection locking of second connecting portion 22.Wherein the diameter of sticking department 3 be 2.0~ 6.5mm ensure that the bonding strength and degradation time of first connecting portion 21 and second connecting portion 22.

Due to the difference of different patient's bodily forms, which is arranged to knot that is axially adjustable and can locking Structure.Therefore in form of the sticking department 3 using bolts and nuts cooperation, opening portion 221 is in that can make locking column 31 inside it The strip-shaped hole of sliding is locked after regulating the length of connecting plate 2, then by sticking department 3.Additionally by solid in the form Determine device, by being first bonded fixed plate 1 in centrum, then adjusts the length of connecting plate 2, strutted by the way that two fixed plate 1 is axial The convex edge of centrum, this process can also have the centrum axially distracted effect to compression.

The diameter of fixation hole 11 is 2.0~6.5mm, is arranged at intervals with 3~5 fixation holes 11 in same fixed plate 1.It uses Fixing screws negligible amounts, surgery cost reduces, and reduces centrum and the risk in crack occur.

Fixation hole 11 includes universal hole, and the cardo ring for lock screw is equipped in the universal hole.The universal structure is The prior art, can adjust screw as needed squeezes into direction.Fixing screws pass through the cardo ring and fixed plate 1 in fixation hole 11 Locking fixation is carried out, can not only provide angle stability but also angular adjustment can be carried out in a certain range.

Sticking department 3 is made of poly-lactic acid material.Polylactic acid (PLA) is also known as polylactide, is with microbial fermentation product Lactic acid is monomer chemistries synthesis.Using rear automatically degradable, polylactic acid can be processed to excellent in mechanical performance fiber and Film, intensity are substantially suitable with nylon fiber and polyester fiber.Polylactic acid can be hydrolyzed into lactic acid and acetic acid in vivo, And CO is metabolized as through enzyme₂And H₂O, therefore can be used as medical material.Operation seam is processed into using polylactic acid plastic in Japan, the U.S. Zygonema, artifical bone, artificial skin.

Wherein, fixed plate 1 and connecting plate 2 are all made of titanium alloy material and are made.

The tooth for enhancing itself and centrum binding force, enhancing fixed plate 1 and centrum are equipped in the inner side end of fixed plate 1 Bonding strength.

The above is only the preferred embodiments of the utility model, anyone content according to the present utility model is to the utility model A little simple modification, deformation and the equivalent replacement made each falls within the protection scope of the utility model.

Claims (10)

1. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk, which is characterized in that the device is applied to a section chest of lesion On lumbar vertebrae, the convex edge at axial both ends of the surface and centrum both ends is abutted against, which includes:

Two fixed plates (1) disposed in parallel, fixed plate (1) inside have the radian to match with centrum physiological camber, institute Fixed plate (1) is stated equipped with the fixation hole (11) for wearing screw；

For connecting the connecting plate (2) in the middle part of two fixed plates (1) between two fixed plates (1), the connecting plate (2) is in seperated knot Structure, the first connecting portion being superposed including one end (21) and second connecting portion (22)；And

At the superposition of first connecting portion (21) and second connecting portion (22), it is used for first connecting portion (21) and second connecting portion (22) sticking department (3) locked, the sticking department (3) are made of degradable material.

2. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 1, which is characterized in that the lock Determining portion (3) includes lock-screw.

3. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 1, which is characterized in that the lock Determining portion (3) includes locking column (31) and matched locking cap (32), and the locking column (31) is equipped with locking screw, described Locking column (31) and the outside vertical of first connecting portion (21) are fixed, and offering on the second connecting portion (22) can make to lock The opening portion (221) that column (31) passes through.

4. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 2 or 3, which is characterized in that institute The diameter for stating sticking department (3) is 2.0~6.5mm.

5. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 3, which is characterized in that described to open Oral area (221) is in the strip-shaped hole that locking column (31) can be made to slide inside it.

6. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 1, which is characterized in that described solid The diameter for determining hole (11) is 2.0~6.5mm, is arranged at intervals with 3~5 fixation holes (11) on same fixed plate (1).

7. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 1, which is characterized in that described solid Determining hole (11) includes universal hole, and the cardo ring for lock screw is equipped in the universal hole.

8. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 1, which is characterized in that the lock Determine portion (3) to be made of poly-lactic acid material.

9. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 1, which is characterized in that described solid Fixed board (1) and connecting plate (2) are all made of titanium alloy material and are made.

10. a kind of inner fixing device for the preceding road treatment of Thoracolumbar disk according to claim 1, which is characterized in that described The inner side end of fixed plate (1) is equipped with the tooth for enhancing itself and centrum binding force.