KR101822632B1 - Cervical Cage - Google Patents

Abstract

The present invention relates to a cage for cervical vertebral bodies for replacing a damaged intervertebral disk. According to the present invention, a main body is formed as a trapezoidal ring with a cavity in the center thereof, has uneven upper and lower surfaces for anti-slip, and has a plane size not larger than a vertebral body. The main body also includes a left wing which protrudes in a left diagonal direction as one body with a left surface of the main body and is inserted in the form of a wedge into an inner space of a left Luschka joint between an upper vertebral body and a lower vertebral body. A right wing of the main body is symmetrical to the left wing and inserted in the form of a wedge into an inner space of a right Luschka joint. Since the left and right wings are supported tightly by a hard outer part of the vertebral body with high bone density, the descending problem of the cage for the cervical vertebral bodies can be prevented. Further, the upper hook protrusions on the left and right outer parts hold the left and right wings tightly on the right and left sides so the left and right wings are not dislodged from their original positions. Accordingly, the cage for the cervical vertebral bodies of the present invention can prevent the dislocation problem where the cage inserted between the cervical vertebral bodies is dislocated from the original position even when a patient twists his/her neck.

Description

 {Cervical Cage}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of cervical vertebrae, and more particularly, to a vertebral interbody cage which is inserted between a vertebral body of a cervical vertebra and replaces the function of a damaged disc.

The cervical vertebrae, or cervical vertebrae, consist of a total of seven vertebrae located directly beneath the head bone. An Intervertebral Disc, i.e., a disk, is located between the throat. The disc may be damaged due to aging or accidents, which may lead to a situation where it is no longer usable. In that case, the cervical cage can be used to replace the damaged intervertebral disc. The cage cage is a structure to remove the damaged intervertebral disc and to maintain the height between the two lower vertebrae in the place, and to supply the bones for fusion between the two vertebrae.

Figure 1 illustrates a conventional cervical interbody cage. The damaged intervertebral disc between the upper vertebral body 40-1 and the lower vertebral body 40-2 of the cervical vertebra can be removed and the cervical vertebrae cage 1 can be inserted thereinto. The conventional cage 1 for cervical vertebrae is representative of the two types shown in Fig. The first type cervical cage 1-1 comprises a frame 2 in the form of a trapezoidal or pseudo-trapezoid ring having a height of the intervertebral disc and a partition wall 3 for dividing the cavity 4 surrounded by the frame 2 ) Are formed. The upper surface and the lower surface of the frame 2 and the partition wall 3 are formed as projections and depressions 5 formed with projections such as teeth, spikes and the like for preventing slippage. The cavity (4) is a space where the bone-producing material is filled. The second type cervical spine cage 1-2 has a structure in which the partition wall 3 is removed and has a frame 7 of a trapezoidal or pseudo-trapezoidal ring shape. A cage cage substantially identical or very similar to these two types of cervical cages 1-1, 1-2 is disclosed in Korean Patent Publication No. 10-2009-0112284.

However, in the case of the first type cervical cage 1-1, because the cavity 4 is divided into the partition 3, the space of the cavity 4 is reduced by the space occupied by the partition 3. Therefore, it is difficult to fill the cavity 4 with a sufficient amount of bone-producing material, and the bone union period becomes relatively long, which slows the recovery of the patient. Since the frame 2 is mounted only between the upper body 40-1 and the body 45 of the lower body 40-2, it is necessary to additionally insert a bone- . Further, the protrusions formed on the partition wall 3 have a problem that they interfere with the operation.

In the case of the second type of cervical cage 1-2, the space in the center cavity 9 of the ring-shaped frame 7 is relatively wider since there is no partition 3, and the disadvantages caused by the presence of the partition 3 It can be resolved.

However, both types of cervical cages 1-1 and 1-2 are designed to be mounted only between the upper body 40-1 and the body 45 of the lower body 40-2 have. The cervical vertebrae include a body portion 45 made of porous bone tissue occupying most of the volume and an outer portion constituting the outer periphery while surrounding the body portion 45 thereof. Particularly, the outer portion includes upper claw protrusions 42-1 and 42-2 protruding upward from both sides of the body 45 and made of a harder bone tissue than the body 45. The body portion 45 of the cervical vertebra is relatively weak in strength as compared with the upper claw protrusions 42-1 and 42-2 on both sides thereof. The cervical cages 1-1 and 1-2 may cause a problem of subsidence because they are supported only by the cervical vertebra body 45 having a weak strength.

Specifically, when the practitioner of the cervical spine cages 1-1 and 1-2 performs a neck rotation, the cervical vertebrae also rotate. The rotation angle of the vertebrae can be different depending on each position. When the angle of rotation of the neck is large, the rotational angle between the upper and lower vertebral bodies 40-1 and 40-2 becomes large, and the cervical vertebra body The abrasion may be caused in the abrasive layer 45. The degree of wear can be accumulated over time. In addition, the load applied in the vertical direction of the cervical vertebrae can cause wear of the trunk portion 45 of the cervical vertebra that contacts the cervical spine cages 1-1, 1-2. Due to these causes, the degree of abrasion of the trunk portion 45 of the cervical vertebra is increased, and the sinking phenomenon in which the cervical vertebrae cages 1-1 and 1-2 sink down into the trunk portion 45 of the cervical vertebra occurs .

Further, the cervical cages 1-1 and 1-2 are likely to be dislocated. The cage-use cages 1-1 and 1-2 serve to suppress the deviation in the horizontal direction or the radial direction from the engagement between the concavo-convex surfaces 5 and 8 and the trunk portion 45 of the cervical vertebra. However, since the trunk portion 45-1 of the upper trunk 40-1 and the lower trunk 40-2 is not strong, when the practitioner increases the rotation of the neck, the body portion of the trunk of the cervical vertebra, (45) is worn. Accompanied with this, the engagement between the concave and convex surfaces 5, 8 and the cervical vertebra body 45 is loosened, and dislocation of the cervical cages 1-1, 1-2 may occur. Dislocation may occur when permitting movement of the upper and lower vertebrae (40-1, 40-2) before the fusion of the cervical vertebrae is accomplished. The lower and upper ends of the upper and lower vertebrae 40-1 and 40-2 of the upper and lower vertebrae of the inserted cervical cages 1-1 and 1-2 are damaged or weakened to cause a sinking . If there is no movement due to the seating, the rate of osseointegration is high.

2 shows another example of a conventional cervical cage disclosed in Korean Patent Publication No. 10-2017-0079979 entitled " Cervical interbody cage improved in bone contact area and stability. &Quot; The cervical vertebrae 10 shown in the figure are placed on the upper ends of the upper and lower hooking protrusions 42-1 and 42-2 of the cervical vertebrae 40-2 so as to extend between the upper and lower hooking protrusions 42-1 and 42-2 Like protruding portion 20 serving as a girder across the cervical vertebra cage structure 10.

The cervical interbody cage structure 10 is characterized in that it has a structure like a girder on the upper ends of the upper side hooking protrusions 42-1 and 42-2. That is, since the cervical interbody cage structure 10 is formed such that the wing-like protruding portions 20 span over the upper-side upper hook protrusions 42-1 and 42-2 of the structurally rigid body portion 45, And to maximize the bone contact area of the cage so as to distribute the load transferred to the cervical end plate to a wide area end plate.

The wing-shaped protruding portion 20 is placed on both the upper hook protruding portions 42-1 and 42-2 so that the load that the spur member body 45 surrounded by the upper hook protruding portions 42-1 and 42-2 should bear May be reduced to some extent to reduce the sinking phenomenon of the vertebral body portion 45.

However, the protruding portion 20 is simply laid on the upper hook protrusions 42-1 and 42-2, and there is no other means for firmly maintaining such a state, and the structural stability is weak. The possibility of dislocation of the entire cage structure 10 including the protrusions 20 is different from that of the cervical cages 1-1 and 1-2 described above It is not much different. When the practitioner rotates the neck, the cage structure 10 can be excited and can also be displaced from its original position. The protrusion 20 can touch the surrounding neck bone or other tissue. The carotid arteries 47-1 and 47-2 which rise to the head are located just outside the upper hook protrusions 42-1 and 42-2. Spinal cord nerve passes around it. If the degree of dislocation is high, the protrusion 20 may touch the carotid arteries 47-1 and 47-2, which is very dangerous. Further, when the cage structure 10 is inserted into the neck portion for the purpose of performing the procedure, the protruding portions 20 can touch the carotid arteries 47-1 and 47-2 even if they are slightly biased to the left and right. The carotid arteries 47-1 and 47-2 and the spinal cord nerve may be damaged. As described above, the conventional cage structure 10 has a high possibility of causing damage to the carotid arteries 47-1 and 47-2 and the spinal cord nerve at the time of insertion for the procedure and dislocation after the procedure, which is a very serious structural problem.

The wing-shaped protruding portion 20 covers the protruded upper ends of the upper hook protruding portions 42-1 and 42-2 so that a considerable part of the load applied to the cage structure 10 is transmitted to the upper hook protruding portions 42-1 and 42-2, 42-2. ≪ / RTI > If there is excessive movement of the cervical vertebrae, the protrusions 20 may swing up or down or side to side. The protrusions 20 hit the upper hook protrusions 42-1 and 42-2 each time so that the upper hook protrusions 42-1 and 42-2 can cause intense pain.

The wing-shaped protrusions 20, which are spread over both the upper hook protrusions 42-1 and 42-2, are limited by the interval between the upper and lower vertebrae, and are thin. The distal end of the protruding portion 20 having a thin thickness is vulnerable to the load resistance. There is a great risk that the protruding portion 20 will break if subjected to a strong load. Depending on the material, warpage of the protrusion 20 may occur. The bending deformation may weaken the intended settlement preventing function. In the case where the protruding portion 20 is a rigid body that is not deformed flexibly, there is a high possibility that the protruding upper ends of the upper claw protruding portions 42-1 and 42-2 are damaged by a cumulative load. If so, settlement may occur.

Further, when the protruding portion 20 is fragile and broken, various problems may occur. A piece of the broken protrusion 20 may be damaged by touching the carotid arteries 47-1 and 47-2 or the spinal cord nerve. The remaining portion of the protruding portion 20 may also cause continuous cervical deformation and may cause catastrophic damage to the carotid arteries 47-1 and 47-2 during rotation.

1. Korean National Publication No. 10-2009-0112284 2. Korean National Publication No. 10-2017-0079979

SUMMARY OF THE INVENTION In view of the above problems of the conventional cervical spine cages, it is an object of the present invention to provide a cervical spine cage which can be supported not only vertically but also horizontally by a rigid structure of the cervical vertebra, Cervical intervertebral cage of the structure.

Another object of the present invention is to provide a structure that can be prevented from being inserted in the wrong position when the operation is performed because of low skill or mistake of the operator (physician) To provide a cervical interbody cage.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit and scope of the invention.

In order to achieve the above object, a cervical interbody cage according to an exemplary embodiment of the present invention can be inserted in place of an intervertebral disc between an upper vertebral body and a lower vertebra of a cervical vertebra, and includes a body portion, a left wing portion, And a wing portion. The body portion has a planar size not larger than that of the vertebral body surrounded by the outer periphery of the cervical vertebra and a thickness similar to the intervertebral disc. Each of the upper and lower surfaces of the main body portion has a shape of irregularity for preventing slipping. A central portion of the body portion is provided with a bone-material filling cavity. The body portion is generally a trapezoidal or pseudo trapezoidal ring-shaped. The left wing portion is integrally formed with the left side surface of the main body portion and protrudes in the left diagonal direction to form a wedge shape in the first space of the upper inside of the outer rim of the left rush car's joints between the upper and lower breasts And has a shape that can be inserted. Wherein the right wing portion is integrally formed with the right side surface of the main body portion and protrudes in the right diagonal direction so as to be inserted into the second space at the upper inside of the outer rim of the right rush car joint between the upper and lower vertebrae in a wedge- Respectively.

In an exemplary embodiment, the bottom surface of the left wing portion may be an inclined surface or an inclined surface having a shape resembling the inclined upper surface of the lower vertebral body portion defining the first space. The upper surface of the left wing portion may be an inclined surface or an oblique surface having a shape resembling the inclined bottom surface of the upper vertebral body portion defining the first space. The left wing may be supported by the upper vertebral body defining the first space to support the lower vertebral body defining the first space.

In an exemplary embodiment, the bottom surface of the right wing portion may be an inclined surface or an oblique surface having a shape resembling the inclined upper surface of the lower vertebral body portion defining the second space. The upper surface of the right wing portion may be an inclined surface or an inclined surface that resembles the inclined bottom surface of the upper vertebra portion defining the second space. The right wing portion may be supported by the upper vertebral portion defining the second space to support the lower vertebra portion defining the second space.

In an exemplary embodiment, the non-slippery concavo-convex shape may be saw-toothed.

In an exemplary embodiment, the cervical interbody cage is between the lower vertebral body and the upper vertebra and has a shape that fills a space inside the upper claw projection of the outer frame.

In an exemplary embodiment, the main body portion is formed in a space between the boundary of the left rush car joint and the boundary of the right rush car joint in the horizontal direction, and in a space between the upper surface of the vertebral body portion of the lower vertebral body, And a shape that can be inserted into a space between the bottom surface of the trunk portion of the body.

The cervical interbody cage according to the exemplary embodiments of the present invention has a contact area with the cervical vertebrae much wider than the conventional one. Particularly, the left and right wing portions integrally attached to the right and left side surfaces of the main body portion come into contact with the inner inclined surfaces of the outer frame portion of the trunk body portion. The load applied from the upper vertebral body to the lower vertebra is transmitted to the middle portion of the lower vertebra body through the body portion and is evenly transmitted to the outer vertebra of the lower vertebra body through the left and right wing portions. In other words, the outer part of the lower cervical vertebra supports a considerable part of the load transmitted by the cervical interbody cage to the lower vertebral body. The outer periphery of the vertebral body has a dense bone density and a very hard bone structure, so that the vertebral interbody cage can be firmly supported. Therefore, it is possible to prevent the settlement of the cervical interbody cage caused by applying the entire load or a substantial portion to the central part of the trunk body.

Further, the left wing portion and the right wing portion of the cervical interbody cage according to the present invention can be wedged into two spaces in a part of the rush car joint region, that is, inside the left and right outer portions of the trunk body. Accordingly, the upper hook protrusions of the left and right outer frames can securely hold the left and right wings so as not to deviate from their original positions on the left and right sides. It is possible to prevent the dislocation phenomenon that the cervical vertebral body cage deviates from the original position where the cervical vertebral body cage is performed even if a person who has performed the cervical vertebral body cage rotates the neck.

The left and right wing portions of the vertebral interbody cage according to the present invention are located only inside the left and right outer side portions of the vertebral body portion and do not deviate from their positions so there is no risk of damaging other tissues such as blood vessels in the vicinity. The safety of use is high.

In addition, the cervical interbody cage according to the present invention is designed such that the shape of the left and right wing portions can be embedded in the rush car joint region in a wedge shape. Therefore, if the operator is relatively inexperienced, or if he or she fails to insert the cervical interbody cage into the cervical vertebrae as a result of a mistake, normal insertion is not achieved. Therefore, it is possible to automatically prevent insertion into a wrong position at the time of surgery, thereby ensuring safe operation.

Figure 1 shows examples of conventional cervical interbody cages.
Fig. 2 shows another example of a conventional cervical interbody cage.
3 is a view showing the structure of the cervical vertebra.
FIG. 4 is a perspective view of a structure of a vertebral interbody cage according to an embodiment of the present invention, viewed from top to bottom diagonal directions. FIG.
FIG. 5 is a perspective view of the structure of the cervical interbody cage shown in FIG. 4 as viewed from below in an upper diagonal direction. FIG.
6 is a rear view of the cervical interbody cage shown in Fig.
FIG. 7 is a view illustrating a state in which the cervical interbody cage shown in FIG. 4 is inserted into the cervical vertebra.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, And should not be construed as limited to the embodiments described in the foregoing description. That is, the present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the following description. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

Fig. 3 is a view for explaining the structure of the cervical vertebra. Fig. 3 (A) is a plan view of one representative vertebral body among the vertebrae constituting the cervical vertebra, and Fig.

Referring to FIG. 3, one cervical vertebra 40 has a structure in which the vertebral body 45 is located at the center and the outer rim 42 surrounds the vertebral body 45. As shown in FIG. 3A, the vertebral body part 45 is formed with small holes passing through the nutrient blood vessels, so that the bone density is not relatively high. On the other hand, the outer frame portion 42 has no such holes, and the bone tissue is dense and the bone density is high. For this reason, the strength of the outer frame portion 42 is much greater than that of the body portion 45.

The outer frame portion 42 includes two upper claw protrusions 42-1 and 42-2 protruding upward from the left and right sides and a pair of upper claw protrusions 42-1 and 42-2 protruding downward from left and right sides of the lower surface And lower claw protrusions (uncus processes) 57-1 and 57-2. Anatomically, the rush car joints (also referred to as uncovertebral joints or neurocentral joints) are provided on the left and right between the upper claw protrusions 42-1 and 42-2 and the lower claw protrusions 57-1 and 57-2 ) 30 are formed. The rush carotid joint 30 is located in the neck region between the third cervical vertebra (C3) and the seventh cervical vertebra (C7). The rush carotid joint 30 permits flexion and extension, and limits lateral flexion of the cervical vertebrae.

4 and 5 are perspective views of the cervical interbody cage 100 according to the embodiment of the present invention, viewed from the upper diagonal direction and the lower diagonal direction, respectively. 6 is a rear view of the cervical interbody cage shown in Fig. FIG. 7 is a view illustrating a state in which the cervical interbody cage shown in FIG. 4 is inserted into the cervical vertebra.

4 to 7, a cervical interbody cage 100 according to an exemplary embodiment of the present invention may include a body portion 110, a left wing portion 120, and a right wing portion 130 have. The intervertebral interbody cage 100 includes inner regions 60 and 70 of the left and right rush car joints 30-1 and 30-2 (the inner region of the rush car joint is an outer rim of the space forming the rush car joint 30) The left and right wings 120 and 130 are provided on both sides of the cage body 110. The left wing portion 120 and the right wing portion 130 are formed on the left and right sides of the cage body portion 110, . ≪ / RTI > The main body 110 is a space between the inner region 60 of the left rush car joint and the inner region 70 of the right rush car joint in the horizontal direction and the space between the inner side region 70 of the right rush car joint Can be inserted into a space between the upper body 50 and the bottom portion 57 of the body portion of the upper body 40-1.

According to an exemplary embodiment, the body portion 110 may be in the form of a ring provided with a bone material filling cavity 140 in the middle. The overall planar shape of the main body 110 may have a planar shape similar to the top surface 50 of the vertebral body 45 surrounded by the outer cusp of the cervical vertebra. The shape may be roughly a trapezoidal or similar trapezoidal shape.

According to an exemplary embodiment, it is preferable that the plane size of the body portion 110 is not larger than the size of the upper surface 50 of the trunk portion 45. The thickness can be approximately the same as the thickness of the intervertebral disc.

The upper surface and the lower surface of the body portion 110 are portions contacting the bottom surface 57 and the upper surface 50 of the trunk body portion 45. The upper surface and the lower surface of the main body 110 may be irregular surfaces so that the abutted portions do not slip. According to the exemplary embodiment, the concave-convex surface may be configured in such a manner that a plurality of serrated protrusions 112 extending in a lengthwise direction from the left end to the right end of each of the upper surface and the lower surface of the main body 110, . The shape of the roughened surface need not always be limited to a serrated shape, and the roughened surface of another geometric shape that is effective in preventing slippage is also possible.

A hole 142 for a surgical operation may be provided on the front surface of the main body 110. The doctor can insert a treatment tool (not shown) into the hole 142 to hold the cervical interbody cage 100. [

A bead seat 144 may be provided to penetrate a predetermined position of the main body 110 to check whether the vertebral interbody cage 100 is inserted at the correct surgical position. The bead seat 144 may be formed of a material capable of shielding the X-ray used for confirming the operation position, for example, a metal material.

The left wing portion 120 is integrally formed with the left side surface of the main body portion 110 and protrudes in the left diagonal direction. The left wing portion 120 has an inner space 60 of the left rush car joint 30-1 between the upper main body 40-1 and the lower main body 40-2 60 ') in a wedge shape. The inner space 60 of the left side rush car joint 30-1 or the first space 60 is an area of the outer frame 42 outside the trunk body 45 and the left upper hook protrusion 42-1, (A space surrounded by four dotted lines on the left side in Fig. 7).

According to an exemplary embodiment, the left wing portion 120 may have a shape that can abut the portion of the upper vertebral body 40-1 that defines the first space 60 and the portion of the lower vertebral body 40-2. have. The bottom surface 124 of the left wing portion 120 may be an inclined surface or an inclined surface having a shape resembling the inclined upper surface 55-1 of the lower vertebral body portion defining the first space 60. [ The upper surface 122 of the left wing portion 120 may be an inclined surface or an inclined surface similar to the inclined bottom surface 57-1 of the upper vertebra portion defining the first space 60. [ The left wing portion 120 may extend in a diagonal direction on the left side surface of the main body portion 110 and may be added in a left wing shape of the main body portion 110. [ The left wing portion 120 is supported by the inclined upper surface 55-1 of the lower vertebral body defining the first space 60 and is inclined It can support the bottom 57-1.

According to an exemplary embodiment, the right wing 130 may have a symmetrical shape with respect to the left wing 120 with respect to the body portion 110. That is, the right wing 130 is integrally formed with the right side surface of the main body 110 and protrudes in the right diagonal direction. The right wing portion 130 has an inner space 70 of the right rush car joint 30-2 between the upper and lower vertebral bodies 40-1 and 40-2 70) ") in a wedge shape. The inner space 70 of the right rush car joint 30-2, that is, the second space 70 is an area of the outer frame 42 outside the trunk body 45, and the upper right hook protrusion 42- 2 (a space surrounded by four dotted lines on the right side in Fig. 7).

According to an exemplary embodiment, the right wing portion 130 may have a shape that can abut the portion of the upper vertebral body 40-1 and the portion of the lower vertebral body 40-2 that define the second space 70 have. The bottom surface 134 of the right wing portion 130 may be an inclined surface or an inclined surface having a shape resembling the inclined upper surface 55-2 of the lower vertebral body portion defining the second space 70. [ The upper surface 132 of the right wing portion 130 may be an inclined surface or an inclined surface similar to the inclined bottom surface 57-2 of the upper vertebral body portion defining the second space 70. [ The right wing 130 may extend in a diagonal direction on the right side surface of the main body 110 and may be added in the form of a right wing of the main body 110. [ The right wing portion 130 is supported by the inclined upper surface 55-2 of the lower vertebral body defining the second space 70 and is inclined relative to the upper vertebral body portion defining the second space 70 It can support the bottom 57-2.

As shown in Fig. 7, the cervical interbody cage 100 according to the exemplary embodiment of the present invention having such a structure and a shape has an outer periphery between the lower vertebral body 40-2 and the upper vertebral body 40-1 The space inside the left and right upper hook protrusions 42-1 and 42-2 of the portion 42 can be filled. In other words, the cervical interbody cage 100 is configured such that the main body 110 is placed on the upper surface 50 of the center portion of the trunk body 45 and the left wing portion 120 and the right wing portion 130, And can be located on the left upper inclined surface 55-1 and the upper right inclined upper surface 55-2.

The cervical interbody cage 100 according to exemplary embodiments of the present invention may be made of a material such as a titanium alloy, a polyether ether ketone (PEEK) polymer, a carbon fiber, a ceramic, or a corrosion resistant metallic material.

The intervertebral interbody cage 100 according to the exemplary embodiment of the present invention can be inserted in place of a damaged intervertebral disc between any two vertebral bodies located adjacent to each other among the vertebrae constituting the cervical vertebrae. The bone-producing material can be filled in the cavity 140 provided in the center of the body portion 110. [ The bone-producing material can be fused with the upper and lower vertebrae 40-1 and 40-2.

The intervertebral interbody cage 100 according to the exemplary embodiment of the present invention has a much larger area in contact with the vertebral body than in the conventional art. Particularly, the inclined upper surface 55-1 on the left side and the inclined upper surface 55-2 on the right side of the vertebral body portion 45 supporting the left wing portion 120 and the right wing portion 130 are dense It is a solid organization. Therefore, a substantial portion of the load applied to the cervical interbody cage 100 can be borne by the inclined upper surface 55-1 on the left side and the inclined upper surface 55-2 on the right side of the trunk body 45, The load applied to the upper surface 50 of the central portion of the trunk body portion 45 can be greatly reduced. As a result, it is possible to prevent the upper surface 50 of the middle part of the trunk body 45, which is a relatively weak bone tissue, from sinking.

The left wing portion 120 and the right wing portion 130 of the cervical vertebral body cage 100 are formed on the inner side of the upper hook protrusions 42-1 and 42-2 of the left and right outer side portions of the trunk body portion 45 1 space 60 and the second space 70, respectively. The upper hook protrusions 42-1 and 42-2 of the left and right outer frames can firmly hold the left wing portion 120 and the right wing portion 130 so as not to deviate from their original positions on the left and right sides. Therefore, even if a person who has performed the cervical interbody cage 100 rotates his or her neck, the interbody cervical vertebrae 100 does not deviate from the position described. Since there is no risk of delamination or settling, there is no risk of damaging other tissues such as blood vessels or nerves passing around the vertebral body.

Since the left wing portion 120 and the right wing portion 130 are provided and they are inserted into the first and second spaces 60 and 70 of the rush car joint in a wedge shape, The cervical interbody cage 100 can not be inserted at the correct position between the upper and lower vertebrae 40-1 and 40-2 unless the cervical interbody cage 100 is accidentally inserted into the correct position. And it is advantageous to induce insertion at a structurally correct position. It complements low proficiency and can prevent mistakes during surgery.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

For example, the cavity 140 provided in the body 110 may be provided with a partition (not shown) across the cavity 140. The upper and lower surfaces of the partition wall may be formed as uneven surfaces similar to the upper and lower surfaces of the main body 110.

The present invention can be used as a cervical interbody cage that can be practiced to replace a damaged intervertebral disc of the cervical vertebrae.

100: cervical interbody cage 110:
120: left wing part 130: right wing part
140: bone material filling joint

Claims (6)

A cervical interbody cage which is inserted in place of an intervertebral disc between an upper vertebra and a lower vertebra of a cervical vertebra,
The upper surface and lower surface of each of the upper and lower surfaces are each provided with a non-slippery concavo-convex shape, and the middle portion thereof is provided with a cavity for filling a bone-producing material so as to have a trapezoidal shape or a similar shape A ring-shaped main body portion in a trapezoidal shape;
And is integrally formed with the left side surface of the main body part so as to protrude in the left diagonal direction and can be inserted into the first space of the upper inside of the outer rim of the left rush car's joints between the upper and lower vertebrae in a wedge- A left wing having a shape; And
A right wing having a shape that is integrally formed with a right side surface of the body portion and protrudes in a right diagonal direction and can be inserted into a second space at an upper inside of the upper rim of the right rush car joint between the upper and lower rudder bodies, ≪ / RTI >
Wherein the bottom surface of the left wing portion is an inclined or inclined curved surface having a shape resembling the inclined upper surface of the lower vertebral body portion defining the first space and the upper surface of the left wing portion is inclined Wherein the left wing portion is supported by the upper vertebral portion defining the first space to support the lower vertebra portion defining the first space,
Wherein the bottom surface of the right wing portion is an inclined or inclined curved surface having a shape resembling the inclined upper surface of the lower vertebral body portion defining the second space and the upper surface of the right wing portion is inclined Wherein the right wing is supported by the upper vertebral body defining the second space to support the lower vertebral body defining the second space, The interbody cage. delete delete The intervertebral intervertebral cage according to claim 1, wherein the non-slippery concavo-convex shape has a sawtooth shape. The intervertebral intervertebral cage of claim 1, wherein the cervical interbody cage is between the lower vertebral body and the upper vertebra, and has a shape that fills a space inside the upper claw projection of the outer vertebra. [2] The apparatus as claimed in claim 1, wherein the main body part is disposed in a space between the boundary of the left rush car joint and the boundary of the right rush car joint in the horizontal direction and in a space between the upper surface of the vertebral body part of the lower vertebral body, And a shape that can be inserted into a space between the bottom surface of the trunk body portion.

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