Semi-open intervertebral fixing member

Abstract

The present invention relates to a semi-open intervertebral fixing member and, more specifically, to a semi-open intervertebral fixing member comprising: an accommodation part having a space formed therein; a first head part extending upward from the upper end of the accommodation part; a second head part extending upward from the upper end of the accommodation part and spaced apart from and facing the first head part; a fully-opening part which is formed between one side of the first head part and one side of the second head part and fully open from top to bottom; and a partially-opening part which is formed between the other side of the first head part and the other side of the second head part and in which the other side of the first head part and the other side of the second head part are partially connected by a connection part. The fully-opening part is formed in a path along which a fixing rod and an insert mechanism are inserted, and the partially-opening part is formed only on the opposite side of the fully-opening part by using the connection part without interference. Therefore, it is possible to prevent a set screw from being dislodged while being inserted.

Description

Semi-open intervertebral body fixation device

[0001] The present invention relates to an intervertebral body fixation material, and more particularly, to a semi-open intervertebral body fixation material that can simultaneously achieve interference prevention and fixation screw detachment prevention by applying a fully open portion in the direction in which an insert device is inserted and applying a partially open portion that is partially connected only in the opposite direction.

[0002]

[0003] The spine, which generally supports the main parts of the human body, is made up of 33 vertebrae. Specifically, there are seven cervical vertebrae that support the neck, 12 thoracic vertebrae connected to the ribs, five lumbar vertebrae that support the lower back, five sacrum vertebrae, and four coccyx vertebrae.

[0004] Between the 24 vertebrae in the cervical, thoracic, and lumbar vertebrae are intervertebral discs, which act as cushions to prevent the bones from rubbing against each other. This structure not only cushions the spine and supports human posture, but also serves as a foundation for movement and plays a vital role in protecting all internal organs.

[0005] Intervertebral discs support the vertebrae to prevent them from slipping out of alignment, separate the two vertebrae to prevent spinal nerve compression, maintain the range of the spinal joint space, and facilitate the movement of each vertebra. These discs are typically composed of a soft, gel-like nucleus pulposus and a tough, thick annulus fibrosus surrounding the nucleus pulposus. The annulus fibrosus regulates the movement of the vertebrae, while the nucleus pulposus, located within, is composed of 70-80% water.

[0006] Damage occurs when the nerves (spinal cord or nerve roots) in the spine are compressed by abnormally grown vertebrae or herniated discs, or when repeatedly lifting objects in poor posture, when the lower back and abdominal muscles are weakened, when lifting excessively heavy weights, or when continuously applying force that the discs cannot withstand, and depending on the degree of the damage, it can cause pain and even paralysis.

[0007] Recently, as the population has been aging, the number of patients with spinal diseases such as spinal stenosis, herniated disc, and facet joint hypertrophy has been rapidly increasing, and research on treatment methods is also actively being conducted.

[0008] To treat these spinal diseases, a method is sometimes used to physically correct the spine by removing the damaged intervertebral disc between the vertebrae, replacing it with an intervertebral disc implant in the space between two adjacent vertebrae, and inserting an intervertebral body fixation material to fix the deformed spine.

[0009] The intervertebral body fixation material used at this time consists of a bone screw that is inserted and connected to the upper and lower intervertebral bodies of the damaged spine, a receiving portion that receives the upper end of the bone screw, a fixing rod that connects each receiving portion and acts as a support, and a fixing screw that fixes the bone screw and fixing rod.

[0010] Figure 1 is a drawing showing the appearance of a conventional general intervertebral body fixation material.

[0011] The receiving portion of a conventionally used intervertebral body fixation device is divided into a constrained receiving portion in which the upper portion is connected, as shown in (a) of Fig. 1, and an open receiving portion in which the upper portion is not connected and is open, as shown in (b) of Fig. 1, depending on the shape of the upper portion.

[0012] However, since the conventional restraint-type receptacle is connected by a connecting part, it can prevent deformation of the receptacle during surgery, but it has the disadvantage of making surgery difficult due to interference with the fixation rod or insert device.

[0013] Conventionally, the open-type receiving portion has an open upper portion, so interference with the fixing rod or insert mechanism can be prevented, but there is a problem that the receiving portion opens when the fixing screw is inserted, causing the fixing screw to come off.

[0014] Additionally, there is a problem that manufacturers must manufacture both types, as doctors who treat spinal disorders have different preferences for either the bound or open type.

[0015] To improve the above problems, products that can be converted from a constrained receptacle to an open receptacle are being developed. However, these products also have a problem in that when the constrained receptacle is converted to an open receptacle by cutting the connecting part and inserting the fixing screw, the remaining closure part is opened by the soft tissue (fat, muscle) located in the insertion path, causing the fixing screw to come out.

[0016] The matters described above as background technology are only intended to enhance understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those of ordinary skill in the art.

[0017]

[0018] The present invention is intended to solve the problems of the prior art described above, and its purpose is to provide a semi-open intervertebral body fixation material in which a completely open portion is formed in a path through which a fixing rod and an insert device are inserted, thereby preventing interference.

[0019] In addition, another purpose of the present invention is to provide a semi-open intervertebral body fixation member that can prevent the problem of a fixing screw being detached when inserted by forming a partially open portion using a connecting portion only on the opposite side of a fully open portion.

[0020] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the art from the description of the present invention.

[0021]

[0022] The present invention for achieving the above object comprises a configuration including: a receiving portion having a space formed therein; a first head portion extending upwardly from the top of the receiving portion; a second head portion extending upwardly from the top of the receiving portion and spaced apart from the first head portion so as to face the first head portion; a fully open portion formed between one side of the first head portion and one side of the second head portion and completely open vertically; and a partially open portion formed between the other side of the first head portion and the other side of the second head portion and having the other side of the first head portion and the other side of the second head portion partially connected by a connecting portion; wherein the connecting portion is characterized in that it is disposed on only one side between the first head portion and the second head portion.

[0023] It is preferable that a semi-open intervertebral body fixation member according to an embodiment of the present invention further includes a pair of incisions formed on one upper side of the first head and one upper side of the second head, and positioned adjacent to the fully open part with the fully open part interposed therebetween.

[0024] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the upper width of the first head and the upper width of the second head be relatively narrower than the lower width of the first head and the lower width of the second head due to the pair of incisions.

[0025] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the incision be formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a downward slope in the direction of the entire open portion from the upper portion of the first head portion and the upper portion of the second head portion.

[0026] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the incision be formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a convex surface in the direction of the entire open portion from the upper portion of the first head portion and the upper portion of the second head portion.

[0027] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the incision be formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a concave surface in the direction of the entire open portion from the upper portion of the first head portion and the upper portion of the second head portion.

[0028] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the incision be formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a stepped surface having a step in the direction of the fully open portion from the upper portion of the first head portion and the upper portion of the second head portion.

[0029] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, the connecting portion connects the other side of the first head and the other side of the second head, and is preferably positioned at a position that protrudes further outward than the side of the first head and the side of the second head.

[0030] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the connecting portion is positioned between the uppermost end of the first head portion and the uppermost end of the second head portion.

[0031] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the connecting portion be positioned at a position spaced downward from the uppermost end of the first head portion and the uppermost end of the second head portion.

[0032] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that the upper surface of the connecting portion and the upper surfaces of the first head and the second head protrude upward in an arch shape.

[0033] In a semi-open intervertebral body fixation member according to an embodiment of the present invention, it is preferable that at least one concave portion formed to be sunken downward is further formed on the upper surface of the connecting portion.

[0034] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that a transverse cut portion be formed between the receiving portion and the first head portion and between the receiving portion and the second head portion.

[0035] In a semi-open intervertebral body fixation device according to an embodiment of the present invention, it is preferable that at least one through hole is perforated on the first head and the second head.

[0036] A semi-open intervertebral body fixation device according to an embodiment of the present invention preferably further includes: a bone screw entering the lower end of the receiving portion; a fixing screw entering from the upper ends of the first head and the second head and being received in the receiving portion; and a fixing rod received in the receiving portion and positioned between the bone screw and the fixing screw.

[0037]

[0038] The present invention, having the above configuration, has the effect of preventing the detachment of the fixing screw while preventing interference during surgery by applying a fully open portion to the path through which the fixing rod and the insertion mechanism are inserted and applying a partially open portion as a connecting portion on the opposite side.

[0039] Specifically, the present invention has a shape in which the upper part of the first head and the upper part of the second head are completely open along the path in which the fixed rod and the insert mechanism are inserted, so interference by the insert mechanism can be fundamentally prevented.

[0040] In addition, the present invention has a shape in which only a part of the head is opened by connecting the first head and the second head on the opposite side of the entire opening, so that the problem of the head opening and the fixing screw coming off during surgery can be solved.

[0041] Furthermore, the present invention has the effect of significantly improving production efficiency by standardizing product types since it is not necessary to manufacture the intervertebral body fixation material by dividing it into a restricted type or an open type as in the conventional intervertebral body fixation material.

[0042]

[0043] It is to be understood that the attached drawings are provided for reference only to help understand the technical concept of the present invention, and the scope of the present invention is not limited thereby.

[0044] Figure 1 is a drawing showing the appearance of a conventional general intervertebral body fixation material.

[0045] FIG. 2 is a drawing showing a semi-open intervertebral body fixation member according to one embodiment of the present invention as viewed from the direction of the entire opening.

[0046] FIG. 3 is a drawing showing a semi-open intervertebral body fixation member according to one embodiment of the present invention, viewed from a partially open portion direction.

[0047] Figure 4 is a drawing showing the disassembled appearance of each component of a semi-open intervertebral body fixation member according to one embodiment of the present invention.

[0048] FIG. 5 is a drawing showing a head portion viewed from the front according to one embodiment of the present invention.

[0049] Figure 6 is a drawing showing various embodiments of a cutting portion according to the present invention.

[0050] Figure 7 is a drawing showing the upper view of a head according to one embodiment of the present invention.

[0051] FIG. 8 is a side view of a receiving portion and a head portion according to one embodiment of the present invention.

[0052] FIG. 9 is a drawing showing the top view of a head according to another embodiment of the present invention.

[0053] FIG. 10 is a drawing showing a head viewed from the front according to another embodiment of the present invention.

[0054] Figure 11 is a drawing sequentially illustrating the operation of a semi-open intervertebral body fixation device according to one embodiment of the present invention.

[0055] Figure 12 is an enlarged view showing a rotary tool according to one embodiment of the present invention being inserted into the upper part of the head.

[0056] FIG. 13 is an enlarged view showing a fixed rod and insert mechanism inserted into the upper part of the head according to another embodiment of the present invention.

[0057]

[0058] A semi-open intervertebral body fixation member according to the present invention comprises a receiving portion having a space formed therein, a first head portion extending upwardly from the upper end of the receiving portion, a second head portion extending upwardly from the upper end of the receiving portion and spaced apart from the first head portion so as to face the first head portion, a fully open portion formed between one side of the first head portion and one side of the second head portion and being completely open in the vertical direction, and a partially open portion formed between the other side of the first head portion and the other side of the second head portion and having the other side of the first head portion and the other side of the second head portion partially connected by a connecting portion, wherein the connecting portion is characterized in that it is disposed on only one side between the first head portion and the second head portion.

[0059]

[0060] Hereinafter, the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0061] In order to clearly explain the present invention, parts that are not related to the description are omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0062] In addition, terms and words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0063]

[0064] FIG. 2 is a drawing showing a semi-open intervertebral body fixation member according to an embodiment of the present invention as viewed from the direction of the fully open portion, FIG. 3 is a drawing showing a semi-open intervertebral body fixation member according to an embodiment of the present invention as viewed from the direction of the partially open portion, and FIG. 4 is a drawing showing each part of a semi-open intervertebral body fixation member according to an embodiment of the present invention in an exploded state.

[0065] As illustrated, the semi-open intervertebral body fixation device according to the present invention basically comprises a receiving portion (100), a bone screw (110), a fixing rod (120), and a fixing screw (130), and is used in spinal disease surgery.

[0066] The above-mentioned receiving portion (100) has a space formed therein to accommodate a bone screw (110), a fixing rod (120), and a fixing screw (130), and is open at the top and bottom. The bone screw (110) enters the bottom of the receiving portion (100), and the fixing rod (120) and the fixing screw (130) enter the top of the receiving portion (100), and are fastened to each other inside the receiving portion (100).

[0067] The above bone screw (110) is inserted into the spine and has a head formed in the shape of a ball or egg at the upper portion. The head of the bone screw (110) enters the lower portion of the receiving portion (100) and can be provided as a multi-axis screw that can move freely.

[0068] The above fixation bar (120) connects and fixes a plurality of receiving portions (100) and bone screws (110) inserted along the spine. The fixation bar (120) can be positioned substantially parallel to the longitudinal direction of the spine.

[0069] An inner screw portion (101) is formed on the inner surface of the receiving portion (100), and an outer screw portion (131) is formed on the outer surface of the fixing screw (130). As the outer screw portion (131) engages with the inner screw portion (101), the fixing screw (130) can be firmly fixed to the inside of the receiving portion (100).

[0070] A tool groove is formed on the upper surface of the above-mentioned fixed screw (130) so that a rotary tool (R) can be inserted therein. The rotary tool (R) is inserted in the vertical direction of the receiving portion (100), and when the user turns the rotary tool (R), the fixed screw (130) rotates and is fastened inside the receiving portion (100).

[0071] At the top of the above-mentioned receiving portion (100), a first head portion (200) and a second head portion (300) are extended upwardly to serve as a path for surgical instruments and fixing screws (130) to assist in spinal surgery. As illustrated, the first head portion (200) and the second head portion (300) are spaced apart from each other and face each other.

[0072] A fully open portion (400) and a partially open portion (500) may be formed in the space where the first head portion (200) and the second head portion (300) are spaced apart from each other. The fully open portion (400) and the partially open portion (500) are spaced apart from each other to face each other, similar to the first head portion (200) and the second head portion (300).

[0073] As illustrated in Fig. 2, the entire opening (400) is formed between one side of the first head (200) and one side of the second head (300) and is completely open vertically. During spinal surgery, the entire opening (400) is positioned in the path through which the fixation rod (120) and the insertion device (I) are inserted.

[0074] As shown in Fig. 3, the above-mentioned partial opening (500) is formed between the other side of the first head part (200) and the other side of the second head part (300), and the other side of the first head part (200) and the other side of the second head part (300) are partially connected and blocked by the connecting part (600).

[0075] The above connecting portion (600) is placed only in a part of the two opening portions (500), and serves as a bridge connecting the first head portion (200) and the second head portion (300) placed on both sides of the connecting portion (600).

[0076] In other words, the present invention has a completely open, fully open portion (400) arranged in one space among the spaced spaces between the first head portion (200) and the second head portion (300), and a partially open portion (500) partially blocked by a connecting portion (600) arranged in the opposite space, so that the interference prevention effect and the opening prevention effect can be achieved simultaneously during spinal surgery.

[0077]

[0078] FIG. 5 is a drawing showing a head portion according to an embodiment of the present invention as viewed from the front, and FIG. 6 is a drawing showing various embodiments of a cut portion according to the present invention.

[0079] As shown, a pair of cutouts (210, 310) may be further formed on the upper side of the first head portion (200) and the upper side of the second head portion (300) to facilitate insertion of the fixing rod (120) and the insertion mechanism (I).

[0080] The above pair of incisions (210, 310) are positioned on both sides of the total opening (400) adjacent to the entire opening (400) located on the path through which the fixation rod (120) and the insert device (I) are inserted during spinal surgery.

[0081] As illustrated in Fig. 6(a), the upper end of the first head portion (200) and the upper end of the second head portion (300) may be formed basically in a shape of the letter I without forming a cut portion (210, 310). In this case, the width of the upper end of the first head portion (200) and the upper end of the second head portion (300) may be the same as the width of the lower end of the first head portion (200) and the lower end of the second head portion (300), or may be formed relatively larger by the connecting portion (600) protruding outward.

[0082] When the pair of cut portions (210, 310) are formed as shown in FIG. 6(b) to FIG. 6(e), the upper width (A) of the first head portion (200) and the upper width (B) of the second head portion (300) are formed to be relatively narrower than the lower width (B) of the first head portion (200) and the lower width (B) of the second head portion (300).

[0083] Specifically, as illustrated in FIG. 6(b), the cut portion (210, 310) can be formed by cutting the upper side of the first head portion (200) and the upper side of the second head portion (300) so as to have a downward slope angle (210b) from the upper side of the first head portion (200) and the upper side of the second head portion (300) toward the entire opening portion (400).

[0084] In addition, as illustrated in FIG. 6(c), the cut portion (210, 310) may be formed by cutting the upper side of the first head portion (200) and the upper side of the second head portion (300) so as to have a convex surface (210c) in the direction of the entire opening portion (400) from the upper side of the first head portion (200) and the upper side of the second head portion (300).

[0085] In addition, as illustrated in FIG. 6(d), the cut portion (210, 310) can be formed by cutting the upper side of the first head portion (200) and the upper side of the second head portion (300) so as to have a concave surface (210d) in the direction of the entire opening portion (400) from the upper side of the first head portion (200) and the upper side of the second head portion (300).

[0086] Lastly, as illustrated in FIG. 6(e), the cut portion (210, 310) may be formed by cutting the upper side of the first head portion (200) and the upper side of the second head portion (300) so as to have a stepped surface (210e) having a step from the upper side of the first head portion (200) and the upper side of the second head portion (300) toward the fully open portion (400).

[0087] Of course, the various shapes of the above-described cut portions (210, 310) are exemplary, and any shape can be selected as long as the upper width (A) of the first head portion (200) and the upper width (B) of the second head portion (300) are formed relatively narrower than the lower width (B) of the first head portion (200) and the lower width (B) of the second head portion (300).

[0088] In this way, the above-mentioned cut portions (210, 310) can be formed in various shapes at the upper end of the first head portion (200) and the upper end of the second head portion (300), and interference with the insert mechanism (I), etc. can be effectively prevented.

[0089] Meanwhile, as illustrated in FIG. 5, one or more through holes (220, 320) may be perforated on the first head portion (200) and the second head portion (300). As illustrated in FIG. 2 and the like, it is preferable that the through hole (220) formed on the first head portion (200) and the through hole (320) formed on the second head portion (300) are arranged to face each other.

[0090] The above one or more penetration holes (220, 320) can be connected to a specific surgical instrument during spinal disease surgery, and are formed so that the user can directly check the implantation depth of the intervertebral body fixation material.

[0091]

[0092] FIG. 7 is a drawing showing the top view of a head according to one embodiment of the present invention, FIG. 8 is a drawing showing the side view of a receiving portion and a head according to one embodiment of the present invention, FIG. 9 is a drawing showing the top view of a head according to another embodiment of the present invention, and FIG. 10 is a drawing showing the front view of a head according to another embodiment of the present invention.

[0093] As shown, a connecting portion (600) is arranged at the upper end of a partially open portion (500) formed between the other side of the first head portion (200) and the other side of the second head portion (300), and the connecting portion (600) connects the other side of the first head portion (200) and the other side of the second head portion (300).

[0094] At this time, the connecting portion (600) is positioned at a position that protrudes further outward than the side surface of the first head portion (200) and the side surface of the second head portion (300). That is, as shown in Fig. 6(a), when the connecting portion (600) is formed, the width of the upper portion of the first head portion (200) and the upper portion of the second head portion (300) becomes relatively wider than the width of the lower portion of the first head portion (200) and the lower portion of the second head portion (300).

[0095] Since the above connecting portion (600) is positioned at a position that protrudes further outward than the side of the first head portion (200) and the side of the second head portion (300), the user can easily cut the connecting portion (600) using a cutting tool or the like.

[0096] As illustrated in FIG. 7, in one embodiment of the present invention, the connecting portion (600) is basically positioned between the uppermost portion of the first head portion (200) and the uppermost portion of the second head portion (300).

[0097] As shown in FIGS. 9 and 10, in another embodiment of the present invention, the connecting portion (600) may be positioned at a position spaced downward from the uppermost portion of the first head portion (200) and the uppermost portion of the second head portion (300).

[0098] In this way, in another embodiment of the present invention, when the connecting portion (600) is positioned lower than the uppermost portion, the upper portion of the connecting portion (600) also takes an open form, so that interference between the fixing rod (120) and the insert mechanism (I) can be more effectively prevented from occurring on the upper side of the partially open portion (500).

[0099] It is preferable that the upper surface of the above-mentioned connecting portion (600) and the upper surfaces of the first head portion (200) and the second head portion (300) protrude upward in an arch shape. That is, the upper surface of the connecting portion (600) has a shape in which the central portion is the highest and gradually lowers as it goes inward and outward.

[0100] Meanwhile, as illustrated in FIG. 8, one or more concave portions (610) that are sunken downward are further formed on the upper surface of the connecting portion (600). Similarly, one or more concave portions (610) that are sunken upward are formed on the lower surface of the connecting portion (600). The concave portions (610) are used when cutting the connecting portion (600) by using a cutting tool or the like.

[0101] In addition, it is preferable that a cutting portion (102) be formed transversely between the receiving portion (100) and the first head portion (200) and between the receiving portion (100) and the second head portion (300). The cutting portion (102) is used when the first head portion (200) and the second head portion (300) are removed from the receiving portion (100) by cutting with a cutting tool or the like.

[0102] In this way, the present invention can connect the first head (200) and the second head (300) by arranging the connecting part (600) in the partially open part (500) between the first head (200) and the second head (300), thereby preventing the fixing screw (130) from being detached due to the gap between the first head (200) and the second head (300) widening during the surgical process.

[0103]

[0104] FIG. 11 is a drawing sequentially illustrating the operation of a semi-open intervertebral body fixation device according to one embodiment of the present invention, FIG. 12 is an enlarged drawing illustrating a rotary tool according to one embodiment of the present invention being inserted into the upper part of the head, and FIG. 13 is an enlarged drawing illustrating a fixation rod and insert mechanism according to another embodiment of the present invention being inserted into the upper part of the head.

[0105] As shown, for surgery of spinal disease, the bone screw (110) is inserted from the lower side of the receiving part (100), and the fixing rod (120) is connected to the insert mechanism (I) and inserted from the upper side of the first head part (200) and the second head part (300).

[0106] At this time, if the upper ends of the first head portion (200) and the second head portion (300) are restrained during the process of inserting the fixed rod (120) and the insert mechanism (I), interference with the insert mechanism (I) may occur. However, the present invention can fundamentally prevent interference by forming the path through which the insert mechanism (I) is inserted into the fully open portion (400).

[0107] When the above fixed rod (120) is arranged in a direction parallel to the spine and a plurality of receiving portions (100) are connected to each other, a fixing screw (130) is inserted into the upper side of the first head portion (200) and the second head portion (300), a rotating tool (R) is inserted in the upper and lower direction of the first head portion (200) and the second head portion (300) to rotate, and the fixing screw (130) is fastened to the inside of the receiving portion (100).

[0108] The present invention forms a partially open portion (500) on the opposite side where the entire open portion (400) is formed, and connects the upper ends of the first head portion (200) and the second head portion (300) with a connecting portion (600), thereby preventing the problem of the first head portion (200) and the second head portion (300) being separated during the surgical procedure and the fixing screw (130) being detached.

[0109] As illustrated in Fig. 12, the upper surface of the connecting portion (600) connecting the first head portion (200) and the second head portion (300) protrudes upward in an arch shape. The arch-shaped connecting portion (600) helps the rotary tool (R) inserted in the vertical direction of the first head portion (200) and the second head portion (300) to be inserted more smoothly into the interior of the first head portion (200) and the second head portion (300).

[0110] Meanwhile, in another embodiment of the present invention, as illustrated in FIG. 13, the connecting portion (600) is positioned at a position spaced downward from the uppermost portion of the first head portion (200) and the uppermost portion of the second head portion (300), so as to more effectively prevent the insert mechanism (I) from interfering with the upper portion of the partially open portion (500).

[0111] That is, since the upper side of the partially open portion (500) is also open based on the above-mentioned connecting portion (600), the insert mechanism (I) may not interfere at all with the first head portion (200) and the second head portion (300) even when inserted at a lower angle.

[0112] In this way, the present invention has the effect of preventing the detachment of the fixing screw (130) while preventing interference during surgery by applying a fully open portion (400) to the path through which the fixing rod (120) and the insertion mechanism (I) are inserted and applying a partially open portion (500) as a connecting portion (600) on the opposite side, and also has the effect of preventing interference during insertion of the rotary tool (R) by protruding the upper surface of the connecting portion (600) in an arch shape.

[0113] The present invention described above is not limited to the above-described embodiments and the attached drawings, and it will be apparent to a person skilled in the art to which the present invention pertains that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention.

Claims

1. A receiving portion in which space is formed inside; A first head portion extending upward from the top of the receiving portion; A second head extending upward from the top of the receiving portion and spaced apart from the first head to face it; A fully open portion formed between one side of the first head and one side of the second head, and completely open in the upper and lower directions; and A partially open portion formed between the other side of the first head and the other side of the second head, and partially connected between the other side of the first head and the other side of the second head by a connecting portion; A semi-open intervertebral body fixation member characterized in that the above connecting part is positioned only on one side between the first head part and the second head part.

2. In paragraph 1, A semi-open intervertebral body fixation device characterized by further comprising a pair of incisions formed on the upper side of the first head portion and the upper side of the second head portion, and positioned adjacent to the fully open portion with the fully open portion interposed therebetween.

3. In paragraph 2, A semi-open intervertebral body fixation device characterized in that the upper width of the first head and the upper width of the second head are relatively narrower than the lower width of the first head and the lower width of the second head due to the pair of incisions.

4. In paragraph 2, A semi-open intervertebral body fixation member characterized in that the above-mentioned incision is formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a downward slope in the direction of the entire opening portion from the upper portion of the first head portion and the upper portion of the second head portion.

5. In paragraph 2, A semi-open intervertebral body fixation member characterized in that the above-mentioned incision is formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a convex surface in the direction of the entire opening portion from the upper portion of the first head portion and the upper portion of the second head portion.

6. In paragraph 2, A semi-open intervertebral body fixation member characterized in that the above-mentioned incision is formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a concave surface in the direction of the entire opening portion from the upper portion of the first head portion and the upper portion of the second head portion.

7. In paragraph 2, A semi-open intervertebral body fixation member characterized in that the above-mentioned incision is formed by cutting one side of the upper portion of the first head portion and one side of the upper portion of the second head portion so as to have a stepped surface having a step in the direction of the fully open portion from the upper portion of the first head portion and the upper portion of the second head portion.

8. In paragraph 1, A semi-open intervertebral body fixation member characterized in that the connecting portion connects the other side of the first head and the other side of the second head, and is positioned at a position that protrudes further outward than the side of the first head and the side of the second head.

9. In paragraph 1, A semi-open intervertebral body fixation member characterized in that the above connecting portion is positioned between the uppermost portion of the first head portion and the uppermost portion of the second head portion.

10. In paragraph 1, A semi-open intervertebral body fixation member characterized in that the above connecting portion is positioned at a position spaced downward from the uppermost portion of the first head portion and the uppermost portion of the second head portion.

11. In paragraph 1, A semi-open intervertebral body fixation member characterized in that the upper surface of the above-mentioned connecting portion and the upper surfaces of the first head portion and the second head portion protrude upward in an arch shape.

12. In paragraph 1, A semi-open intervertebral body fixation member characterized in that one or more concave portions are further formed on the upper surface of the above connecting portion, and are formed to be sunken toward the bottom.

13. In paragraph 1, A semi-open intervertebral body fixation device characterized in that a transverse cut portion is formed between the receiving portion and the first head portion and between the receiving portion and the second head portion.

14. In paragraph 1, A semi-open intervertebral body fixation device characterized in that one or more through holes are perforated on the first head portion and the second head portion.

15. In paragraph 1, A bone screw entering the lower part of the above-mentioned receptacle; A fixing screw that enters from the top of the first head and the second head and is received in the receiving portion; and A semi-open intervertebral body fixation device characterized by further comprising a fixation rod accommodated in a receiving portion and positioned between a bone screw and a fixation screw.

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