CN109925103A - A kind of one balance locking fusion device - Google Patents

Abstract

The invention discloses a kind of one balance locking fusion devices, the fusion device includes locating piece, fixed strip and synchronous screwing-in device, the upper surface and lower surface of the locating piece are equipped with protrusion, and it is provided with filling hole, several fixation holes are provided in the locating piece, the fixed strip is arranged in the fixation hole, hollow cavity is set in the locating piece, the hollow cavity is communicated with the fixed bore portion, the synchronous screwing-in device is arranged in the hollow cavity, the synchronous screwing-in device and the fixed strip threaded engagement, the synchronous screwing-in device is located at the precession interconnecting piece that positioning block front end setting matches with artificial handle.One balance locking fusion device of the invention can select the quantity of fixed strip and the precession angle of fixed strip according to patient's intervertebral situation, and fixed strip is balanced synchronization precession, fixed position synchronism stability, whether in art or it is postoperative be displaced it is all very small.

Description

An integrated balance lock cage

technical field

The present invention relates to a medical instrument, in particular to an integrated balance locking cage.

Background technique

With the aging of the population, spinal degenerative diseases with neck and shoulder pain and low back and leg pain as the main symptoms are seriously affecting people's work and life. Vertebral fusion between vertebral bodies is one of the main methods for the treatment of spinal degenerative diseases. Since Kuslich et al. first used interbody fusion for lumbar interbody fusion in 1988, various materials of interbody cage cameras Come out, and gradually applied to clinical.

At present, a variety of cervical spine cages are used in clinical practice with anterior intervertebral plate. This type of cage cannot be self-fixed, and needs to be fixed with a steel plate outside the cage, which is inconvenient for surgery, and if there is displacement between the cage and the steel plate, it will affect the health of the patient. The other type is an intervertebral cage with a fixation device, but since each fixation screw is tightened separately, the tightening depth and angle are different, and the best fixation effect cannot be achieved.

Therefore, there is a need for a new intervertebral cage, which is convenient for implantation, fusion, and fixation. Several fixing screws can be screwed into one body in a balanced manner, so that the position of the intervertebral cage in the operation will not be displaced, and Post-operative stability is better, reducing intraoperative and postoperative pain for patients.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide an integrated balance locking cage that is convenient for implantation, stable fixation, and can be balanced and fixed in one piece, which can select the precession angle of the fixation screw according to the intervertebral height of different patients, and can better promote Bone graft fusion and implant stability reduce pain for patients.

The integrated balance locking cage includes a positioning block 1, a fixing bar 2 and a synchronous precession device 3. The upper surface and the lower surface of the positioning block 1 are provided with protrusions 4 to facilitate better fusion with the patient's vertebrae. 4 is a dentate protrusion, and is provided with a filling hole 5, which can be filled with bone foam to facilitate postoperative fusion, a number of fixing holes 6 are arranged in the positioning block 1, and the fixing strip 2 is arranged in the fixing holes 6, The positioning block 1 is provided with a hollow cavity 7, which is partially communicated with the fixing hole 6. The synchronous precession device 3 is arranged in the hollow cavity 7, and the synchronous precession device 7 is connected to the fixed hole 6. The bars 2 are threadedly connected, and the fixing bars 2 can be screwed in by rotating the synchronous screw-in device 3. The synchronous screw-in device 3 is located at the rear end of the positioning block 1 and is provided with a screw that matches the manual handle. into the connecting part 8, which is convenient for the surgeon to operate.

Further, the integrated balance locking cage is a backward-moving cage, the front end of the positioning block 1 is lower in height than the rear end, and is axially symmetrical, so that it is convenient to insert the integrated balance locking cage into the intervertebral body of the patient, and the axis is symmetrical. .

Further, the synchronous precessing device 3 is a coaxial screw, and its radius increases from outside to inside, and the fixing bar 2 is a pointed screw, and the pointed screw is connected to the coaxial screw, and the same The rotation of the shaft screw drives the pointed screw to advance synchronously.

Further, the screw-in connection portion 8 is a triangular hole, a quadrangular hole, a pentagonal hole or a hexagonal hole, which is convenient for the doctor to use a suitable rotating handle.

Further, depending on the bone density or the cross-sectional area of the patient's vertebral body, the number of the fixing holes 6 can be selected to be two or three.

Further, the fixing bar 2 and the middle axis of the positioning block 1 are arranged at a certain inclination angle, and the angle is 30° to 45°, which can be selected according to the intervertebral height of the patient, corresponding to the upper and lower sections of the synchronous precession device 3 . The angle between the surface and the middle axis of the positioning block 1 is the same as the inclination angle between the fixing bar 2 and the middle axis of the positioning block 1. Only in this way can the synchronous precession device 3 be rotated to make the fixing bar 2 Precess at a predetermined angle.

Further, the positioning block 1 is integrally formed by 3D printing of titanium alloy, and the upper and lower surfaces are made of absorbable polymer material.

The beneficial effects of the present invention are:

1. The height of the front end of the integrated balance locking cage of the present invention is lower than the rear end, and the axis is symmetrical, which facilitates the insertion of the integrated balance locking cage into the intervertebral body of the patient.

2. The integrated balance locking cage of the present invention is integrally formed by titanium alloy 3D printing.

3. The upper and lower surfaces of the integrated balance locking cage of the present invention are made of absorbable polymer materials. With the fusion of the vertebral bodies, the absorbable polymer materials are gradually degraded and absorbed, which reduces the stress shielding of the bone graft and can better Promote bone graft fusion; in addition, bone graft windows are also set on the upper and lower surfaces, which can better increase the fusion between the vertebral body and the body by adding its own bone.

4. The integrated balance locking cage of the present invention can select the number of fixing bars and the precession angle of the fixing bars according to the intervertebral condition of the patient, and the fixing bars are balanced and synchronously precessed, and the fixing position is synchronously stable, no matter during or after surgery. The displacements are very small.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Figure 1 is a structural diagram of an integrated balance locking cage;

Figure 2 is a cross-sectional view of the front end of the integrated balanced locking cage.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Below in conjunction with specific embodiment, the content of the present invention is described in further detail:

Embodiment 1: In order to achieve the purpose of the present invention, as shown in FIG. 1, an integrated balance locking cage of the present invention is composed of a positioning block 1, a pointed screw 2 and a coaxial screw 3. Both the upper surface and the lower surface are provided with protrusions 4 to facilitate better fusion with the patient's vertebrae, the protrusions 4 are dentate protrusions, and are provided with filling holes 5 (not shown in the figure), which can be filled with bone foam to facilitate postoperative Fusion, the positioning block 1 is provided with a number of fixing holes 6, the pointed screws 2 are arranged in the fixing holes 6, the positioning block 1 is provided with a hollow cavity 7, and the hollow cavity 7 is connected to the The fixing holes 6 are partially connected, the coaxial screw rod 3 is arranged in the hollow cavity 7, the synchronous screwing device 7 is threadedly connected with the pointed screw 2, and the coaxial screw rod 3 can be rotated to The pointed screw 2 is screwed in, and the angle between the pointed screw 2 and the central axis of the positioning block 1 is 30°.

As shown in FIG. 2 , the coaxial screw 3 is located at the rear end of the positioning block 1 and is provided with a pentagonal hole 8 matching the manual handle, which is convenient for the surgeon to operate. When the doctor needs to implant the integrated balance locking cage of the present invention into the intervertebral space of the patient, insert the positioning block 1 into the intervertebral space of the patient, align the handle with the pentagonal hole 8 after positioning, and rotate the coaxial screw rod 3 to drive the tip The head screw 2 is synchronously screwed into the intervertebral bone of the patient, and the positioning effect is good. Compared with locking other screws after a single locking, the displacement generated during the fixing of the positioning block 1 is better, and the operation effect is better.

This embodiment only shows some individual embodiments in which the central axis angle between the pointed screw 2 and the positioning block 1 is 30°, the number of pointed screws 2 is 4, and the screw-in connection part 8 is a pentagonal hole, wherein the pointed screw 2 is a pentagonal hole. The angle between the central axis of the head screw 2 and the positioning block 1 can be selected from 30° to 45°, the number of the 2 pointed screws can be 2-4, and the screw-in connection part 8 can be a triangular hole, a quadrangular hole, Pentagonal holes or hexagonal holes, which are not shown one by one, can be substituted in the embodiment.

Claims (8)

1. An integrated balance locking cage, characterized in that: comprising a positioning block (1), a fixing bar (2) and a synchronous precession device (3), the upper surface and the lower surface of the positioning block (1) are provided with There are protrusions (4) and are provided with filling holes (5), several fixing holes (6) are arranged in the positioning block (1), and the fixing bars (2) are arranged in the fixing holes (6) , a hollow cavity (7) is arranged in the positioning block (1), the hollow cavity (7) is partially communicated with the fixing hole (6), and the synchronous precession device (3) is arranged in the hollow cavity ( In 7), the synchronous precession device (3) is threadedly connected to the fixing strip (2), and the synchronous precession device (3) is located at the front end of the positioning block (1) and is provided with a manual handle. Screw in the connecting part (8). 2 . The integrated balance lock cage according to claim 1 , wherein the integrated balance lock cage is a rear-advance cage, and the front end of the positioning block ( 1 ) has a height lower than the rear end and is axially symmetrical. 3 . 3. The integrated balance locking cage according to claim 1 or 2, characterized in that: the synchronous precession device (3) is a coaxial screw whose radius increases from the outside to the inside, and the fixing bar (2) is Pointed screws. 4. The integrated balance locking cage according to claim 1 or 2, wherein the screw-in connection portion (8) is a triangular hole, a quadrangular hole, a pentagonal hole or a hexagonal hole. 5. The integrated balance locking cage according to claim 1 or 2, wherein the protrusion (4) is a tooth-like protrusion. 6 . The integrated balance locking cage according to claim 5 , wherein the number of the fixing holes ( 6 ) is two, three or four. 7 . 7 . The integrated balance locking cage according to claim 6 , wherein the central axis of the fixing strip ( 2 ) and the positioning block ( 1 ) are arranged at a certain inclination angle, and the angle is 30° to 45°, 8 . The angle between the upper and lower surfaces of the section corresponding to the synchronous precession device (3) and the central axis of the positioning block (1) is the same as the inclination angle between the fixing strip (2) and the central axis of the positioning block (1). 8 . The integrated balance locking cage according to claim 1 , wherein the positioning block ( 1 ) is integrally formed by 3D printing of titanium alloy. 9 .