CN106562813B

CN106562813B - Once integral cutting intervertebral disc tissue and intervertebral space forming cutter

Info

Publication number: CN106562813B
Application number: CN201610959442.8A
Authority: CN
Inventors: 邹德威
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-10-28
Filing date: 2016-10-28
Publication date: 2023-11-28
Anticipated expiration: 2036-10-28
Also published as: CN106562813A

Abstract

The invention provides a one-time integral cutting and intervertebral disc tissue shaping cutter, which comprises: a housing having a hollow cavity; the edge of the first end of the shell forms a closed periphery by an end cutting edge, and the second end of the shell is a chisel end capable of receiving a hammer; the sliding groove is positioned in the hollow cavity, is arranged on the inner wall of the shell, and extends to the end cutting edge of the first end of the shell according to the direction from the second end of the shell to the first end of the shell, and is a continuous curve; the blade with a cutting edge is positioned in the hollow cavity and is arranged in the chute; an adjustment hole provided on the housing; and the push-pull bolt is slidably arranged in the adjusting hole and is connected with the blade. The invention only cuts for a few seconds, creating an ideal space for complete matching, whether bone grafting or placement of the fusion cage.

Description

Once integral cutting intervertebral disc tissue and intervertebral space forming cutter

Technical Field

The invention relates to the field of medical appliances, in particular to a cutting tool used in intervertebral disc operation, namely an intervertebral disc tissue one-time integral cutting and intervertebral space forming cutter.

Background

In spinal surgery, along with the deep research of spinal pathology and the continuous progress of auxiliary technologies such as intervertebral bone grafting fusion technology, the excision of intervertebral disc soft tissues and the clean formation of regular intervertebral spaces form ideal spaces which are matched with bone grafting fusion devices as completely as possible, and become an important link for successful surgery.

However, due to the special position of the intervertebral disc, the deepest position of the human body and the surrounding barrier which completely embeds the intervertebral disc, a room which has no door and no window and is completely sealed around is provided. The "ceiling" and "floor" are both rigid bone plates oriented through the long axis of the body without any access at all, and even if an artificial attempt is made to drill an access, there is no "working face" of "construction" at all, and 360 ° all around is tightly wrapped by thick "fiber rings" as if it were multi-layered leather, and located in the center of the long axis of the body, in fact the "axis" of the body's load bearing axis, with the space therein being completely filled with "nucleus pulposus" tissue.

The Nucleus pulposus (Nucleus pulposus) is a semi-liquid mass with high elasticity, has a jelly-like shape and has a special 'creep' viscous substance, the composition of which is 70-90% of water, and the rest: proteoglycans (proteolycan) account for 65% and collagen (collagen) for 15-20%, forming a semi-liquid viscous mass (semifluid mass of mucoid material) of dense-like material, which is particularly "creep", first of all, manifested as a pliable elasticity. The position is called as a top-to-bottom position, bears the stress (weight and gravity acceleration of falling high) from a ceiling (the lower endplate of the upper bony vertebrae), and is compressed and deformed after being absorbed, and the stress is transferred to a floor (the upper endplate of the lower bony vertebrae) after being released uniformly and slowly like a spring; at the same time, the "nucleus pulposus" tissue located between each segment, which is also the largest single volume organ of the human body that is completely avascular (avascular), is harvested and metabolized by diffuse infiltration of the upper and lower endplates in close contact therewith.

Thus, aging deterioration must occur with age or other adverse factors of overstress; once denatured, it cannot be repaired by regeneration like some other tissues, such as skin, muscle. Therefore, when the function of the cervical vertebra is attenuated, the cervical vertebra is necessarily narrowed, the ceiling is close to the floor, the stress is lost to buffer and temporarily breathe, and the cervical vertebra is gradually changed into hard direct transmission, so that a series of pathological changes such as instability dislocation of the vertebral segment, hyperosteogeny, spinal nerve compression and the like are caused.

The effective solution is to remove the degenerated disc tissue as much as possible, regenerate enough space, fill the fusion cage manufactured by the modern technology into the space, and fuse the bone implantation in parallel, so that the bone implantation is restored to be stable. The nucleus pulposus tissue is cleared, a reasonably regular space between the upper vertebral body and the lower vertebral body is established, and the fed fusion device is positioned at a reasonably stable position, so that the method is a key step for successful operation.

However, as previously mentioned, due to the specificity of the composition of the nucleus pulposus tissue and the concealment of its location, current methods and instruments are not capable of directly accessing the intervertebral space, performing an intuitive "sweeping" of the ceiling and floor, and the difficulty of removing bulk tissue in one go, with only a single opening in the surrounding annulus fibrosus "wall", with a single point inside-out digging removal with the globally popular instruments "curet" and nucleus pulposus forceps (protractor or tubutorry).

The curet is especially a small ladle with a long handle and an angle, the edge of the ladle is edged, the ladle and the handle are angled, the angle is gradually changed from 0 degrees to 90 degrees, and the size is also serialized. The nucleus pulposus pliers are especially like the beaks of birds, and the folded edges are edged, namely the key step of removing nucleus pulposus tissues is carried out by the only edge tool in the hands of the current global spinal surgeons, and when the operation is carried out, the curettes can only be repeatedly and alternately sent into the window, scooped out one scoop along the plane of the upper or lower endplate after contacting with the upper or lower endplate, or sent into the mouth to one bite, the angles are changed, and the time and the effort are consumed alternately, and the nucleus pulposus pliers are difficult to clean; and due to the viscosity and creep property of the nucleus pulposus tissue, a regular required three-dimensional space, especially a cuboid space, can not be achieved ever, so that the fusion device which is subsequently sent into the device is improper in position, loose, displaced and even dislocated, and the fusion device becomes a serious postoperative complication which bothers doctors and patients.

In addition, the retractor commonly used in the existing surgical operation mainly has two main types. and a, a manpower structure, mainly comprising a handle with proper angle and comfort. The assistant is required to stand for hours to hours, even tens of hours in a special position by virtue of continuous traction with high stability of physical strength, and the assistant is actually a kind of hard physical labor, and is often caused by forced position and continuous exertion to cause unsmooth movement and change of the operation field, so that complaints, even cursory and carelessness of the operator who is attentive are caused at any time. This is a common scenario in any operating room worldwide, and is the requisite path for any surgeon to develop a mature and hard history-! Unfortunately, this situation has not yet been radically altered. In various operations, and in a considerable number of special part operations, the traditional 'drag hook' mode is still used, but the figure of the 'camel auspicious' which is contained in the 'spicy' is not always appeared in the brain of the person! b mechanical structure. Aiming at the reality, more and more automatic drag hooks are introduced in more than twenty years. The automatic retractor is characterized in that a retractor handle extending to the outside of the body is connected with various adjustable mechanical structures (a frame, a bolt, teeth and the like), and the distance between the two handles at the outside of the body is increased by rotating, so that retractor blades arranged in an incision are separated to two sides, and a deep operation field is exposed. However, whatever mechanical structure is adopted, a frame type (the size of the frame depends on the required width of the incision) barrier is necessarily formed around the external incision, if the four sides are required to be pulled open for shielding, the barrier occupation space is increased accordingly, and particularly in certain narrow parts such as the neck, the limited space required by the operation of hands above the incision is necessarily squeezed while the deep limited operation field is exposed, the operation difficulty is increased, the skill of hands of an operator is tested, and the operation quality is directly affected. Meanwhile, even if four sides around the incision are pulled open, the peripheral normal tissues cannot be completely shielded due to the congenital deficiency of the width of the blade, so that the normal tissues continuously bulge from the gaps of the retractor blade and squeeze into the operative field to interfere the sight of an operator; meanwhile, as the surgical knife is directly exposed in the surgical field, the potential risk of cutting or burning at any time once the surgical knife is lost when the surgical knife is held by a sharp instrument by hand is objectively increased, so that the surgical knife is always in a 'like ice, like in deep-in-the-air' scene.

In summary, the following problems exist in the prior art: in intervertebral disc surgery, it is difficult for existing surgical tools to obtain the desired stereoscopic space.

Disclosure of Invention

The invention provides a cutter for integrally cutting intervertebral disc tissues at one time and shaping an intervertebral space so as to obtain a required three-dimensional space in an intervertebral disc operation.

Therefore, the invention provides a cutter for forming intervertebral disc space by integrally cutting intervertebral disc tissue at one time, the intervertebral disc tissue is wholly cut once, and the intervertebral space shaping cutter comprises:

a housing having a hollow cavity; the shell is provided with two ends, namely a first end of the shell and a second end of the shell, and the shell is provided with a bottom wall;

the first end of the housing is provided with a fenestration for cutting disc tissue.

Further, the edge of the first end of the shell is provided with an end cutting edge, the windowing is formed by the end cutting edge to form a closed periphery, and the second end of the shell is a chisel end capable of receiving a hammer;

the sliding groove is positioned in the hollow cavity, is arranged on the inner wall of the shell, extends to the end cutting edge of the first end of the shell according to the direction from the second end of the shell to the first end of the shell, is a continuous curve, and the bottom end of the sliding groove is positioned on the bottom wall of the first end of the shell; the top end of the sliding groove is positioned between the second end of the shell and the first end of the shell;

the blade with a cutting edge is positioned in the hollow cavity and is arranged in the chute;

an adjustment hole provided on the housing;

and the push-pull bolt is slidably arranged in the adjusting hole and is connected with the blade.

Further, the cross section of the shell is rectangular, triangular, circular, elliptical or trapezoidal.

Further, the blade is a spring steel sheet.

Further, the chute includes: the linear section and the bending section are connected, and a guide protruding part protruding out of the inner wall is arranged on the inner wall of the shell at the transition connection part of the linear section and the bending section.

Further, the adjusting hole is a rectangular hole.

Further, the cross section of the casing is rectangular, and the inner wall includes: the sliding chute comprises a top wall, a bottom wall and two side walls, wherein the number of the sliding grooves is two, one sliding groove is arranged on each side wall, and the two sliding grooves are arranged in parallel.

Further, each of the runners extends from the side wall to the bottom wall.

Further, the cross-sectional dimensions of the housing are 10mm×16mm to 40mm×28mm.

Further, the hollow cavity is cylindrical, the window is formed by a first cutting edge, a second cutting edge, a third cutting edge and a fourth cutting edge, the first cutting edge, the second cutting edge and the third cutting edge are positioned in a first plane, two ends of the first cutting edge and the third cutting edge are respectively connected through the second cutting edge and the fourth cutting edge, the second cutting edge is far away from the second end of the shell, and the fourth cutting edge is close to the second end of the shell; and the first plane is obliquely intersected with the hollow cavity or is parallel to the axis of the hollow cavity, the fourth cutting edge is positioned in a second plane, and the second plane is obliquely intersected with or vertically intersected with the hollow cavity.

Further, the first cutting edge and the third cutting edge are respectively parallel to the axis of the hollow cavity, the fourth cutting edge is perpendicular to the axis of the hollow cavity, and the second end of the shell is provided with a knob.

In the invention, through the windowing of the cut intervertebral disc tissue, the whole excision and complete extraction of the intervertebral disc tissue can be directly finished once, and the left space is a working space available in operation.

According to the invention, the shell with the corresponding size can be selected according to the individual difference of the patient and the size model of the fusion device to be placed in the predicted amount, after the position is determined, the shell can smoothly enter the intervertebral disc space by only tapping the chisel end, and the cutter can be positioned in parallel with the upper and lower end plates and is really positioned in the intervertebral disc space, so that the cutter can be penetrated into the contralateral annulus without any concern (the data measured before operation are matched with the scale value of the cutter and the X-ray perspective confirmation in operation) to complete the cutting. At this time, the push-pull bolt is pushed down, the front end (first end) is closed, the cutter is taken out, the nucleus pulposus tissues contained in the hollow cavity are cut down, the whole nucleus pulposus tissues are taken out completely, a three-dimensional space with regular shape is generated in the disc space, and an ideal space which is completely matched with the bone grafting or the fusion cage placement is generated only by cutting for a few seconds. This is an instrument such as a curet, a nucleus pulposus clamp, and the like which are currently available, and is difficult or even impossible to operate. As mentioned above, the nucleus pulposus tissue of the intervertebral disc is the single largest volume of completely avascular proteoglycan and collagen tissue in the human body and is jelly-like, so that the cutter of the design has no difficulty and potential risk in operation. The advantages are also evident compared to current devices.

Drawings

FIG. 1 is a schematic perspective view of an intervertebral disc tissue single-pass total cutting and intervertebral space formation cutter according to a first embodiment of the present invention; wherein the push-pull bolt is positioned at an initial position;

FIG. 2 is a schematic perspective view of a cutter for forming an intervertebral space, showing one-time overall incision of intervertebral disc tissue according to the first embodiment of the present invention; wherein the push-pull bolt is positioned at the middle position;

FIG. 3 is a schematic perspective view of a cutter for forming an intervertebral space, showing one-time overall incision of intervertebral disc tissue according to the first embodiment of the present invention; wherein the push-pull bolt is positioned at a final position;

FIG. 4 is a schematic side view of a first end of a housing according to a first embodiment of the invention;

FIG. 5 is a schematic view showing the structure of one side wall of the housing according to the first embodiment of the present invention;

FIG. 6 is a schematic view of another side wall of the housing according to the first embodiment of the present invention;

FIG. 7 is a schematic diagram of the position relationship between the blade and the chute in FIG. 1;

FIG. 8 is a schematic diagram illustrating the relationship between the blade and the chute in FIG. 2;

FIG. 9 is a schematic illustration of the working principle of the intervertebral disc tissue one-time total cutting, intervertebral disc formation cutter according to the first embodiment of the present invention during surgery;

FIG. 10 is a view of an intervertebral disc tissue one-time total incision, an intervertebral disc space shaping cutter, showing the actual view of the deep surgical field during surgery, using a first embodiment of the present invention;

FIG. 11 shows, from a first perspective, a perspective view of a disc tissue single-pass total incision, and a disc space shaping cutter in accordance with a second embodiment of the present invention;

FIG. 12 shows, from a first perspective, a perspective view of a disc tissue single-pass total incision, and a disc space shaping cutter in accordance with a second embodiment of the present invention;

FIG. 13 shows, from a third perspective, a perspective view of a disc tissue single-pass total incision, and a disc space shaping cutter in accordance with a second embodiment of the present invention;

FIG. 14 shows, from a fourth perspective, a primary, total incision of disc tissue, and a front view of an intervertebral space formation cutter, according to a second embodiment of the present invention;

FIG. 15 shows a fifth perspective view of a head-on incision of disc tissue of a second embodiment of the present invention;

fig. 16 shows a sixth perspective view of the anterior view of the disc tissue of the second embodiment of the present invention, taken entirely once, and showing the configuration of the disc space shaping cutter.

Reference numerals illustrate:

1 first end of housing 11 first end of housing 12 second end of housing

121 bottom wall 122 top wall 123 side wall 124 side wall

3 chute 4 operation field (incision) 5 blade 6 adjusting hole 7 push-pull bolt 8 side fiber ring 9 guiding protruding part

31 straight line segment 32 curved segment

15 first edge 152, second edge 153, third edge 154 and fourth edge of window 151

17 knob

Detailed Description

For a clearer understanding of technical features, objects, and effects of the present invention, the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 3, 9, and 11 to 13, the present invention proposes an intervertebral disc tissue one-time integral cutting and intervertebral space shaping cutter for one-time complete cutting and complete taking out of the intervertebral disc tissue, while leaving a space as a suitable working space, the intervertebral disc tissue one-time integral cutting and intervertebral space shaping cutter comprising:

a housing 1 having a hollow cavity; the housing 1 has two ends, a first end 11 of the housing and a second end 12 of the housing, respectively, the housing having a bottom wall 121;

the first end 11 of the housing is provided with a fenestration 15 for cutting disc tissue for insertion into the disc tissue to complete a complete resection of the disc tissue at one time, leaving a space which is available for surgery.

As shown in fig. 1 to 3 and 9, the disc tissue is once cut in one piece, and the disc space formation cutter includes:

the edge of the first end 121 of the shell forms a closed periphery by an end cutting edge, the window is formed by the end cutting edge, namely, the edge of the first end 121 of the shell is a sharp opening to form a closed notch, the window is arranged on the end face of the first end 121 of the shell, the second end 122 of the shell is a chisel end capable of receiving a hammer and is used for receiving the hammer or the hammer, and the window is provided with a force receiving surface for receiving the hammer or the hammer so as to enable the first end 121 of the shell to advance under force; the second end 122 of the housing is, for example, hollow rectangular or closed rectangular;

a chute 3, as shown in fig. 5, 6, 7 and 9, is located in the hollow cavity, is disposed on the inner wall of the housing, and extends from the second end 12 of the housing to the end cutting edge of the first end 11 of the housing in the direction from the second end 11 of the housing to the first end 11 of the housing, wherein the chute 3 is a continuous curve (including a continuous curve with the same curvature and a continuous multi-section curve with different curvatures), and as shown in fig. 2, the bottom end of the chute 3 is located on the bottom wall 121 of the first end of the housing and approaches or reaches the end cutting edge; the top end 122 of the chute is located between the second end 12 of the housing and the first end 11 of the housing;

as shown in fig. 2, 3, 7 and 8, a blade 5 with a cutting edge is positioned in the hollow cavity and slidably arranged in the chute 3;

an adjustment hole 6 provided in the housing 1;

a push-pull pin 7 is slidably provided in the adjustment hole 6, and the push-pull pin 7 is connected to the blade 5. When pushing the push-pull bolt 7, the built-in blade 5 extends out of the chute 3 and descends along the chute 3 to close the sharp knife edge.

As shown in fig. 9, when in use, the shell with the corresponding size is selected according to the individual difference of the patient and the size model of the fusion device to be placed in the predicted amount, after the position is determined, the shell can smoothly enter the intervertebral disc space by only tapping the chisel end, and the cutter can be cut by just determining the position of the cutter, for example, making the cutter parallel to the upper and lower end plates and truly in the intervertebral disc space without any concern, and the cutter can be deeply penetrated into the contralateral fibrous ring 8 (the data measured before operation coincide with the scale value of the cutter and the X-ray perspective confirmation in operation).

At this time, the push-pull pin 7 is pushed down, the front end (first end of the housing) is closed, the cutter is taken out, the nucleus pulposus tissue contained in the hollow cavity is cut out completely, as shown in fig. 10, a three-dimensional space with regular shape is generated in the disc space, namely, the incision or the surgical field 4, and an ideal space which is completely matched with the bone grafting or the fusion cage placement is generated only by cutting for a few seconds.

Further, the cross section (cross section) of the housing 1 is rectangular, triangular, circular, elliptical, trapezoidal. In this way, various desired incisions or fields 4 can be achieved.

Further, the blade 5 is a spring steel sheet, so that the blade has good elasticity and can be bent.

Further, as shown in fig. 5, 6, 7 and 8, the chute 3 includes: the straight segment 31 and the curved segment 32 are connected, so that the device is suitable for rapidly cutting the contained nucleus pulposus tissue in operation and is beneficial to complete extraction; as shown in fig. 1 and 7, initially, the leading end of the blade 5 is positioned in the straight section 31 and does not begin cutting, and as shown in fig. 2, 3 and 8, in the intermediate and final positions, the leading end of the blade 5 is positioned on the curved section 32 from the beginning of the curved section 32 to the end of the curved section 32 at the bottom wall, and the cutting is completed. At the transitional connection of the straight line segment 31 and the curved segment 32, a guiding protruding part 9 protruding out of the inner wall is arranged on the inner wall of the shell, and guides and limits the blade 5, so that the blade 5 can cut nucleus pulposus tissues conveniently.

Further, as shown in fig. 1, 2 and 3, the adjusting hole 6 is a rectangular hole, so that the manufacture is convenient, and the reciprocation of the push-pull bolt 7 is convenient.

Further, as shown in fig. 1, 2, 3 and 4, the cross section of the housing is rectangular, and the inner wall is rectangular, so that a standard cuboid space is generated by one operation of the invention. The inner wall includes: the top wall 122, the diapire 121 and two lateral walls, two lateral walls are lateral wall 123 and lateral wall 124 respectively, the number of spout 3 is two, is equipped with one on every lateral wall the spout is equipped with one on lateral wall 123 and the lateral wall 124 respectively spout 3, and two spout 3 parallel arrangement to the both sides that make the blade hold simultaneously in spout 3, be convenient for blade 5 slip, the atress is stable, even, and the slip is smooth.

Further, as shown in fig. 5 and 6, each of the slide grooves 3 extends from the side wall to the bottom wall to achieve a knife edge end of a blade enclosure.

Further, the present invention employs a rectangular parallelepiped housing, and the cross-sectional (cross-sectional) dimensions of the housing 1 are 10mm×16mm to 40mm×28mm. The area of the port of the cuboid cutter is serialized in a certain range according to human anatomy data, and can be stepped by mm to obtain an incision which is suitable for the needs of patients.

Further, the curved section 32 is in a circular arc shape, and the straight section 31 and the curved section 32 are in smooth transition or smooth connection, so as to ensure smooth movement of the blade 5.

When the device is used, as shown in fig. 9, the incision can be pulled by a drag hook or a spreading clamp, the incision can be serialized in a certain range according to individual differences of patients and the size model of the fusion device to be placed in the fusion device, the incision can be stepped from 10mm to 16mm to 40mm to 28mm according to human anatomy data, the shell with the corresponding size is selected, after the position is determined, the incision can be smoothly entered into the intervertebral disc space by only tapping the chisel end, and the position of the cutter is determined, for example, the cutter is parallel to the upper end plate and the lower end plate, and the cutter is really positioned in the intervertebral disc space, so that the cutter can be penetrated into the contralateral fibrous ring 8 without any concern (the data measured before operation are matched with the scale value of the cutter, and X-ray perspective confirmation in operation is added), and the incision is completed.

At this time, the push-pull plug 7 is pushed down, the front end (first end of the housing) is closed, the cutter is taken out, the nucleus pulposus tissue contained in the cuboid hollow cavity is cut out, all the nucleus pulposus tissue is completely taken out, as shown in fig. 10, a three-dimensional space with regular shape is generated in the disc space, namely the incision or the surgical field 4, and an ideal space which is completely matched with the bone grafting or the fusion cage placement is generated only by cutting for a few seconds.

As shown in fig. 11, 12, 13, 14, 15 and 16, the second embodiment of the present invention also shows a single, unitary incision of disc tissue, with the disc space shaping cutter being a pointed cylindrical cutter. The pointed cylindrical cutter also has a hollow cavity and also has a fenestration 15, the main differences of the pointed cylindrical cutter from the previous embodiments are: the window 15 is arranged on the side surface of the end part of the shell, and the edge of the window 15 is a sharp knife edge. After the fenestration 15 reaches the disc tissue, the viscous nucleus pulposus tissue is placed into the hollow cavity through the fenestration, the disc nucleus pulposus tissue placed into the hollow cavity is completely separated from the surrounding by rotating the housing, e.g., rotating the second end of the housing, i.e., closing the fenestration, and the pointed cylindrical cutter is removed, i.e., once a cylindrical space is created and maintained in the disc space.

Further, the window 15 is formed by a first cutting edge 151, a second cutting edge 152, a third cutting edge 153 and a fourth cutting edge 154, the first cutting edge 151, the second cutting edge 152 and the third cutting edge 153 are located in a first plane, two ends of the first cutting edge 151 and the third cutting edge 153 are respectively connected through the second cutting edge 152 and the fourth cutting edge 154, the second cutting edge 152 is far away from the second end 12 of the shell, and the fourth cutting edge 154 is near to the second end 12 of the shell; and, the first plane is obliquely intersected with the hollow cavity or is parallel to the axis of the hollow cavity, and the fourth cutting edge 154 is positioned in a second plane, and the second plane is obliquely intersected with or vertically intersected with the hollow cavity.

The first edge 151 and the third edge 153 are parallel to the axis of the hollow cavity, respectively, for example, the first edge 151, the second edge 152 and the third edge 153 are located on the axial section of the hollow cavity, so that a larger volume of disc tissue can be cut. The second edge 152 is rounded with a pointed tip or two symmetrical arcs intersecting at a point for insertion into disc tissue. The fourth cutting edge 154 is perpendicular to the axis of the hollow cavity, or the fourth cutting edge 154 is located on a radial cross-section of the hollow cavity, which facilitates complete separation of the disc nucleus tissue enclosed within the hollow cavity from the surrounding. The second end 12 of the housing has a knob 17 to facilitate rotation to effect rapid cutting of disc nucleus tissue.

After the pointed cylindrical cutter is inserted into the intervertebral disc tissue through the minimally invasive working channel, viscous nucleus pulposus tissue is filled into the hollow cavity through the window, the knob at the tail end of the cutter is rotated to close the window, the nucleus pulposus tissue of the intervertebral disc filled into the hollow cavity is completely separated from the periphery, and the pointed cylindrical cutter is taken out, so that a cylindrical space is generated and reserved in the intervertebral disc space at one time. The pointed cylindrical cutter is completely separated from the shape of a point blade of the traditional surgical cutting tool, and is an innovation of the tool.

The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. In order that the components of the invention may be combined without conflict, any person skilled in the art shall make equivalent changes and modifications without departing from the spirit and principles of the invention.

Claims

1. An intervertebral disc tissue one-time integral cutting, intervertebral space shaping cutter, characterized in that the intervertebral disc tissue one-time integral cutting, the intervertebral space shaping cutter includes:

the first end of the shell is provided with a fenestration for cutting intervertebral disc tissues; the edge of the first end of the shell is provided with an end cutting edge, the window is formed by the end cutting edge to form a closed periphery, and the second end of the shell is a chisel end capable of receiving a hammer;

the blade with a cutting edge is positioned in the hollow cavity and is arranged in the chute; wherein the blade is a spring steel sheet.

2. The disc tissue one-time total cutting, disc space shaping cutter of claim 1, wherein the disc tissue one-time total cutting, disc space shaping cutter further comprises:

an adjustment hole provided on the housing;

3. The disc tissue one-time, unitary cutting, disc space shaping cutter of claim 1 wherein the shell is rectangular, triangular, circular, oval or trapezoidal in cross-section.

4. The disc tissue one-time, unitary dissection, disc space shaping cutter of claim 1, wherein the chute comprises: the linear section and the bending section are connected, and a guide protruding part protruding out of the inner wall is arranged on the inner wall of the shell at the transition connection part of the linear section and the bending section.

5. The disc tissue one-time, unitary cutting, disc space shaping cutter of claim 2, wherein the adjustment aperture is a rectangular aperture.

6. The disc tissue one-time, unitary-cutting, disc-space-shaping cutter of claim 1, wherein the shell is rectangular in cross-section, and the inner wall comprises: the sliding chute comprises a top wall, a bottom wall and two side walls, wherein the number of the sliding grooves is two, one sliding groove is arranged on each side wall, and the two sliding grooves are arranged in parallel.

7. The disc tissue one-piece cutting, disc space shaping cutter of claim 6 wherein each of the runners extends from the side wall to the bottom wall.

8. The disc tissue one-time integral cutting, disc space shaping cutter of claim 1, wherein the hollow cavity is cylindrical, the fenestration is formed by a first cutting edge, a second cutting edge, a third cutting edge and a fourth cutting edge, the first cutting edge, the second cutting edge and the third cutting edge are positioned in a first plane, two ends of the first cutting edge and the third cutting edge are respectively connected through the second cutting edge and the fourth cutting edge, the second cutting edge is far away from the second end of the shell, and the fourth cutting edge is close to the second end of the shell; and the first plane is obliquely intersected with the hollow cavity or is parallel to the axis of the hollow cavity, the fourth cutting edge is positioned in a second plane, and the second plane is obliquely intersected with or vertically intersected with the hollow cavity.

9. The disc tissue single-pass integral cutting instrument of claim 8, wherein the first and third cutting edges are each parallel to the axis of the hollow cavity, the fourth cutting edge is perpendicular to the axis of the hollow cavity, and the second end of the housing has a knob.