Disclosure of Invention
The purpose of the invention is that: the anterior vertebral body replacement fixing structure can simultaneously realize vertebral body replacement and fix the vertebral body replacement and the adjacent vertebral body, so that the operation is low in incision, the wound surface is small, and the postoperative recovery effect of a patient is improved.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a anterior centrum replacement fixed knot constructs, includes centrum replacement assembly, centrum replacement assembly includes supporting seat, lower supporting seat and self-locking mechanism, go up the supporting seat and establish the inside at the lower supporting seat, go up the supporting seat and can follow lower supporting seat sliding fit and lock as an organic wholely with lower supporting seat through self-locking mechanism, its innovation point lies in: the upper fixing plate of the vertebral body is connected with the side wall of the top of the upper supporting seat into a whole, and the lower fixing plate of the vertebral body is connected with the side wall of the bottom of the lower supporting seat into a whole.
In the above technical scheme, go up the supporting seat and including upper end plate and the last stay tube that links as an organic wholely, lower supporting seat is including lower end plate and the lower stay tube that links as an organic wholely, the fixed plate links as an organic wholely with the lateral wall of upper end plate on the centrum, the fixed plate links as an organic wholely with the lateral wall of lower end plate under the centrum, go up the stay tube and establish the inside and its sliding fit of stay tube under to lock as an organic wholely through self-locking mechanism.
In the technical scheme, the upper vertebral body fixing plate comprises an upper connecting plate and an upper connecting beam which are connected into a whole, a plurality of upper fastening screws fixedly connected with the upper vertebral body are arranged on the upper connecting plate, and the upper connecting beam is connected with the top side wall of the upper supporting seat into a whole; the lower fixing plate of the vertebral body comprises a lower connecting plate and a lower connecting beam which are connected into a whole, a plurality of lower fastening screws fixedly connected with the lower vertebral body are arranged on the lower connecting plate, and the lower connecting beam is connected with the side wall of the bottom of the lower supporting seat into a whole.
In the above technical scheme, an upper tooth slot which is in butt joint with the upper cone for preventing displacement is arranged on the surface of the upper end plate, and a lower tooth slot which is in butt joint with the lower cone for preventing displacement is arranged on the surface of the lower end plate.
In the above technical scheme, self-locking mechanism includes the locking ring, be equipped with the locking ring draw-in groove on the top peristome in the lower stay tube, the locking ring clamps in the locking ring draw-in groove of lower stay tube and suit in the periphery of last stay tube, be equipped with axial opening on the peristome of locking ring, and be equipped with the support step on the inner wall of locking ring, be equipped with the location draw-in groove on the peristome of going up the stay tube on the peristome and along its length direction, when going up the stay tube and upwards moving down the stay tube relatively, the support step card of locking ring makes last stay tube and stay tube locking as an organic whole down in the location draw-in groove, the stay tube has the unlocking hole corresponding with the axial opening of locking ring down.
In the technical scheme, the locking ring is provided with the positioning boss which prevents the locking ring from rotating circumferentially relative to the lower supporting tube, the lower supporting tube is provided with the positioning boss clamping groove close to the locking ring clamping groove, and the positioning boss is arranged in the positioning boss clamping groove of the lower supporting tube.
In the above technical solution, the upper support tube has an upper bone grafting window, and the lower support tube has a lower bone grafting window.
In the above technical scheme, a plurality of air-blood holes which are uniformly distributed and used for promoting bone grafting fusion are formed in the peripheral wall of the lower supporting tube.
In the technical scheme, the upper vertebral body fixing plate and the lower vertebral body fixing plate are both L-shaped fixing plates.
In the above technical scheme, the number of the upper fastening screws on the upper connecting plate and the number of the lower fastening screws on the lower connecting plate are three.
The invention has the positive effects that: after the anterior vertebral body replacement fixing structure of the invention is adopted, as the invention also comprises an upper vertebral body fixing plate and a lower vertebral body fixing plate, the upper vertebral body fixing plate is connected with the side wall at the top of the upper supporting seat into a whole, the lower vertebral body fixing plate is connected with the side wall at the bottom of the lower supporting seat into a whole,
The invention designs the cone replacement assembly (fusion device) and the cone fixing plate into an integrated structure, namely, the upper supporting seat is provided with an upper fixing plate which is connected with the upper fixing plate into a whole, the lower supporting seat is provided with a lower fixing plate which is connected with the lower fixing plate into a whole, when in use, the cone replacement assembly is firstly arranged at the position of the cone to be replaced, then the inner cavities of the upper supporting seat and the lower supporting seat are filled with autologous bone, finally, the upper fixing plate and the lower fixing plate are respectively fixed with the cones adjacent to the upper supporting seat and the lower supporting seat through screws, the front vertebral body replacement fixing structure has the advantages that the structure is simple, the use is convenient, the wound surface is not required to be enlarged, the vertebral body replacement and the fixation of the front vertebral body replacement assembly and the adjacent vertebral bodies can be realized simultaneously, the operation is enabled to be low in notch, and the postoperative recovery effect of a patient is improved.
Detailed Description
The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
As shown in fig. 1,2,3, 4,5 and 6, an anterior vertebral body replacement fixing structure comprises a vertebral body replacement assembly 1, wherein the vertebral body replacement assembly 1 comprises an upper supporting seat 11, a lower supporting seat 12 and a self-locking mechanism 13, the upper supporting seat 1 is arranged in the lower supporting seat 12, the upper supporting seat 1 can be in sliding fit with the lower supporting seat 12 along the lower supporting seat 12 and is locked with the lower supporting seat 12 into a whole through the self-locking mechanism 13, the anterior vertebral body replacement fixing structure further comprises an upper vertebral body fixing plate 2 and a lower vertebral body fixing plate 3, the upper vertebral body fixing plate 2 is connected with the side wall of the top of the upper supporting seat 11 into a whole, and the lower vertebral body fixing plate 3 is connected with the side wall of the bottom of the lower supporting seat 12 into a whole.
As shown in fig. 1,2 and 3, for convenience, the upper and lower fixing plates are respectively connected with the corresponding supporting seats into a whole, the upper supporting seat 11 comprises an upper end plate 111 and an upper supporting tube 112 which are connected into a whole, the lower supporting seat 12 comprises a lower end plate 121 and a lower supporting tube 122 which are connected into a whole, the upper fixing plate 2 of the vertebral body is connected with the side wall of the upper end plate 111 into a whole, the lower fixing plate 3 of the vertebral body is connected with the side wall of the lower end plate 121 into a whole, and the upper supporting tube 112 is arranged in the lower supporting tube 122 and is in sliding fit with the lower supporting tube and is locked into a whole through the self-locking mechanism 13.
As shown in fig. 1, in order to make the upper and lower fixing plates of the present invention not only fit the physiological curvature of a person, but also not increase the thickness of the integral structure of the fixing plates and the supporting seat, the upper vertebral body fixing plate 2 includes an upper connecting plate 21 and an upper connecting beam 22 which are integrally connected, the upper connecting plate 21 is provided with a plurality of upper fastening screws 23 fixedly connected with the upper vertebral body, and the upper connecting beam 22 is integrally connected with the top side wall of the upper supporting seat 11; the lower vertebral body fixing plate 3 comprises a lower connecting plate 31 and a lower connecting beam 32 which are connected into a whole, a plurality of lower fastening screws 33 fixedly connected with the lower vertebral body are arranged on the lower connecting plate 31, and the lower connecting beam 32 is connected with the side wall of the bottom of the lower supporting seat 12 into a whole.
As shown in fig. 2, 3 and 4, in order to prevent the support seats from being displaced, friction force between the upper and lower support seats and the corresponding adjacent vertebral bodies is increased, an upper tooth slot 113 which is in contact with the upper vertebral body for preventing displacement is formed on the surface of the upper end plate 111, and a lower tooth slot 123 which is in contact with the lower vertebral body for preventing displacement is formed on the surface of the lower end plate 121.
As shown in fig. 2,3,4 and 5, in order to make the present invention suitable for the height of the vertebral body replaced by different patients, and ensure that the upper support seat is positioned and locked after sliding relative to the lower support seat, the self-locking mechanism 13 includes a locking ring 131, a locking ring clamping groove 124 is formed on the top peripheral wall in the lower support tube 122, the locking ring 131 is clamped in the locking ring clamping groove 124 of the lower support tube 122 and sleeved on the periphery of the upper support tube 112, a step for hooking the locking ring 131 is formed on the bottom periphery of the upper support tube 112, the locking ring 131 is sleeved on the step, the locking ring 131 can be effectively prevented from falling from the upper support tube 112, an axial notch 132 is formed on the peripheral wall of the locking ring 131, a supporting step 133 is formed on the inner wall of the locking ring 131, a positioning clamping groove 114 is formed on the peripheral wall of the upper support tube 112 along the length direction, and when the upper support tube 112 moves upwards relative to the lower support tube 122, the supporting step 133 of the locking ring 131 is clamped in the positioning clamping groove 114, so that the upper support tube 112 and the lower support tube 122 are locked by the locking ring 131 and the axial notch 125 corresponding to the lower support tube 122. The upper support tube 112 may move upward relative to the lower support tube 122, that is, the overall height of the upper support tube 112 becomes higher after the upper support tube 112 is stretched relative to the lower support tube 122, the positioning clamping groove 114 at the periphery of the upper support tube 112 is clamped on the support step 133 of the upper locking ring 131 of the lower support tube 122, so as to lock the upper support tube 112 and the lower support tube 122, if the upper support tube 112 is to be adjusted downward, the screw driver end portion may be inserted into the unlocking hole 125 to enter the axial opening 132 of the locking ring 131, the screw driver is rotated, so that the locking ring is in a stretched state, the upper support tube 112 may move freely in the inner cavity of the lower support tube 122, after the overall heights of the upper support tube 112 and the lower support tube 122 are adjusted, the locking ring 131 is restored to the initial state after the screw driver is removed, and the positioning clamping groove 114 of the upper support tube 112 is clamped again in the support step 133 of the locking ring 131, so that the use is very convenient.
As shown in fig. 5 and 6, in order to prevent the locking ring from rotating circumferentially in the lower support tube 122, on one hand, the upper support tube 112 is prevented from rotating circumferentially synchronously with the locking ring, on the other hand, the unlocking hole 125 cannot correspond to the axial opening of the locking ring, the locking ring 131 is provided with a positioning boss 134 for preventing the locking ring 131 from rotating circumferentially relative to the lower support tube 122, the lower support tube 122 is provided with a positioning boss clamping groove near the locking ring clamping groove 124, and the positioning boss 134 is clamped in the positioning boss clamping groove of the lower support tube 122.
As shown in fig. 2,4, and 5, for convenience in filling autologous bone, the upper support tube 112 has an upper bone grafting window 115, and the lower support tube 122 has a lower bone grafting window 126.
As shown in fig. 2,3 and 5, in order to promote the bone grafting fusion, a plurality of air-blood holes 127 are uniformly distributed on the outer peripheral wall of the lower support tube 122 for promoting the bone grafting fusion.
As shown in fig. 1, in order to make the structure of the present invention more reasonable, the upper vertebral body fixing plate 2 and the lower vertebral body fixing plate 3 are both L-shaped fixing plates.
As shown in fig. 1, in order to ensure the firmness and stability between the upper and lower connection plates and the adjacent vertebral bodies, the number of the upper fastening screws 23 on the upper connection plate 21 and the number of the lower fastening screws 33 on the lower connection plate 31 are three.
The application process of the invention comprises the following steps:
An implant vertebral body replacement assembly: firstly, the vertebral body replacement assembly 1 is arranged at a position of a patient, which needs to replace the vertebral body, the whole height of the upper support tube 112 is increased after the upper support tube 112 is stretched relative to the lower support tube 122 until the upper tooth groove 113 of the upper end plate 111 is propped against the end surface adjacent to the upper vertebral body, the lower tooth groove 123 of the lower end plate 121 is propped against the end surface adjacent to the lower vertebral body, friction and contact force are increased, displacement is prevented, then the positioning clamping groove 114 at the periphery of the upper support tube 112 is clamped on the support step 133 of the upper locking ring 131 of the lower support tube 122, locking of the upper support tube 112 and the lower support tube 122 is realized, then, a self bone is filled into an inner cavity through the upper bone grafting window 115 of the upper support tube 112 and the lower bone grafting window 126 of the lower support tube 122, and the air-blood hole 127 on the periphery wall of the lower support tube 122 can promote bone grafting fusion;
Fixing the vertebral body replacement assembly: the upper vertebral body fixing plate 2 on the upper supporting seat 1 and the adjacent upper vertebral body are fixed into a whole through the upper fastening screw 23, the lower vertebral body fixing plate 3 on the lower supporting seat 2 and the adjacent lower vertebral body are fixed into a whole through the lower fastening screw 33, and the vertebral body replacement and the fixation of the vertebral body replacement assembly are completed.
The invention designs the cone replacement assembly (the fusion device) and the cone fixing plate into an integrated structure, when in use, the upper cone fixing plate and the lower cone fixing plate of the cone replacement assembly are respectively fixed with the adjacent cones through the fastening screws, the split structure scheme of the cone replacement assembly and the fixing plate in the prior art is replaced, the thickness of the joint of the fixing plate and the cone replacement assembly is greatly reduced, the front cone replacement fixing structure is simple in structure and convenient to use, and can realize cone replacement and fix the adjacent cones at the same time without expanding wound surfaces, so that the operation is low in notch and the postoperative recovery effect of a patient is improved.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.