KR20190115860A - Intervertebral Fusion Implant of Porous Structure with Improved Fixing Part - Google Patents

Abstract

The present invention relates to a porous intervertebral fusion implant having an improved fixing portion, and more specifically, to a porous intervertebral fusion implant comprises: a porous bone growing portion replacing the space between neighboring spinal bones; and a fixing portion fixing a position of an implant inserted between the bone growing portion and the spinal bone. The fixing portion includes: a protrusion formed on a longitudinal lateral surface of the implant and protruding outside the implant in order to increase friction force of the inserted implant; and a linear support frame supporting a porous structure having a protruding shape, wherein the protrusion has a plurality of screw threads arranged at certain intervals for ensuring friction force. In addition, the screw thread includes: a vertical portion perpendicular to the direction of the surface of the bone growing portion in order to ensure friction force in a certain direction; a linear or curved inclined portion having a certain inclination in an insertion direction; and a horizontal portion disposed at end portions of the protruding screw threads in order to reduce damage to tissues surrounding the inserted implant. According to the present invention, the porous structure protrudes more than the support frame in order to maximize a growth speed of a bone to be treated and a cover portion is disposed to cover a through-hole in order to prevent broken bone pieces from departing from the inside of the bone growth portion. The cover portion includes a mesh portion forming pores, thereby enabling a user to observe bone growth within the implant more readily.

Description

IntervertebralFusion Implant of Porous Structure with Improved Fixing Part

The present invention relates to a porous intervertebral fusion implant with improved fixation, and more particularly to a space between the bone growth and the vertebrae, comprising a space between the adjacent vertebral bone and a replacement bone growth. Including a fixing portion for fixing the position of the implant inserted in, the fixing portion is formed on the upper and lower sides of the implant, protruding outside the implant for increasing the frictional force of the implant and the porous structure of the protruding shape It includes a linear support frame for supporting the, wherein the protrusion, the shape of the thread for securing the friction force is arranged in a plurality at regular intervals, the thread, the surface direction of the bone growth to secure the friction force in a certain direction Vertical or vertical inclination, straight or curved inclinations and protrusions with constant inclination in the entry direction At the end of the screw thread is formed a horizontal portion for reducing damage to the tissue surrounding the implant insertion, in order to maximize the bone growth rate of the treatment to allow the porous structure to protrude from the support frame, bone graft fragment inside the bone growth portion Including a cover portion covering the through-holes to prevent the separation of the cover portion relates to a porous intervertebral fusion implant with an improved fixation part, including the mesh portion forming the voids to more easily observe the bone growth inside the implant .

The vertebrae form the longitudinal axis of the body, with seven cervical vertebras, 12 thoracic vertebras, 5 lumbar vertebras, 5 sacrums, and 4 tailbones (coccyx). Spinal bones composed; Spinal disc, also called the intervertebral disc, which is a discoid cartilage structure connecting the vertebral bone with the vertebral bone; Is done.

In general, the vertebral disc absorbs the load and impact of the body between the vertebral bones, acts as a shock absorber to disperse the impact like a spring, holds the vertebral bones away, and separates the vertebral nerves from compression. It makes the range of vertebral joints smooth, and plays a role of smoothing the movement of each vertebral bone.

The spinal disc of such a person usually consists of a fibrous ring and a nucleus pulposus. If the water in the water balloon is the nucleus pulposus, the fibrous ring corresponds to a rubber balloon containing water.

If you develop a degenerative disc disease, you can weaken the movement of the annulus and the ability to contain the nucleus pulposus, leading to a decrease in the water content of the spinal discs, resulting in spinal stenosis, osteophyte formation, and disc prolapse. Diseases such as Lumbar Herniated Intervertebral Disc) and nerve root compression may occur.

As a method for treating diseases related to the vertebral disc, a method is used in which the intervertebral disc of an injured human body is removed and then the space between two adjacent vertebral bodies is replaced with a vertebral fusion prosthesis. This involves implanting an artificial disc in the body of the person, restoring the function of the spine by restoring the original distance between two adjacent vertebral bodies, the original height of the intervertebral disc.

The vertebral fusion prosthesis has an appropriate thickness and anatomical type to restore the original height of the intervertebral disc, and a hole is formed inside to insert a bone graft to increase bone growth. It has a form that facilitates and has a fitting for mounting to an insertion tool.

Postoperative Lumbar Interbody Fusion (PLIF), Transforaminal Lumbar Interbody Fusion (TLIF), Anterior Lumbar Interbody Fusion (ALIF) ), And direct lateral interbody fusion (DLIF).

1 is a view of a spinal cage 90 of a porous structure of the prior art, which is disclosed in Korean Patent Publication No. 1020180009611 (2018.01.29). Referring to Figure 1, in the case of a known porous structure spinal cage 90 includes a porous bone growth portion 91 having a shape complementary to the shape of the inner space between neighboring vertebral bone, The through hole 93 formed to penetrate the other surface from one side to observe the growth of the bone in the body portion, and the fixing portion 95 having a thread having a shape to secure the cage while reducing damage to the vertebral bone It has features to include.

Since the porous structure of the spinal cage 90 has many voids formed throughout the vertebral fusion prosthesis, the spinal cage 90 has an advantage of being able to enter a space between neighboring vertebral bones and greatly promote autologous bone growth of the patient. Including the (95) has the advantage of increasing the fixing force of the implant inserted into the treatment object.

However, since the fixing part 95 is composed of a porous part made of a plurality of pores, the strength of the fixing part 95 is lower than that of titanium or polyether ether ketone (PEEK), which is commonly used for implants. Problems such as breaking or bending of the porous part exist. In addition, even after the implant is inserted, the protruding part may be easily broken or deformed by other external forces such as the movement of the treatment or the load transmitted from the spine, and thus, the fixing force of the inserted implant is lost and fragments of the porous part are broken. There is a problem that can cause other complications. In addition, as the fixing portion 95 is deformed, the distance between the spine of the implant insertion portion is also changed, which results in a loss of the intended therapeutic effect.

Furthermore, the implants are out of position originally planned at the time of surgery, which damages the surrounding tissue at the insertion site and prevents union between the vertebrae as the bones are not held in place and, in severe cases, reoperation. A case may arise. This ultimately results in the financial burden and mental and physical pain of reoperation.

In addition, the implant can observe the growth of the bone graft fragment through the slot in communication with the space in which the autogenous bone is inserted, there is also a problem that the bone graft fragment can escape through the opening of the slot.

This accelerates the growth rate of bones, shortens the time required for complete fusion of adjacent vertebral bones, facilitates the construction of implants with moduli of elasticity close to the modulus of bone of individual patients, and It is easy to implement a certain strength to the implant and at the same time secures a certain fixing force to prevent the risk of tissue damage and reoperation of the treatment target, the growth of internal bone graft fragments can be observed while preventing the departure of the bone graft fragments. In addition, the situation is required to develop a spinal implant that can accurately determine the insertion position of the implant.

The present invention has been made to solve the above problems,

An object of the present invention is to include a porous bone growth portion that replaces the space between neighboring vertebral bones, and includes a fixation portion for fixing the position of the implant inserted in the space between the bone growth portion and the vertebrae. Peripheral bone growth promotes bone growth to allow neighboring vertebral bones to coalesce in a short time, and maximizes the fixation force of the implant within the body after treatment, resulting from the implant leaving its position. It is to provide a porous intervertebral fusion implant with an improved fixation that can prevent tissue damage and promote the growth rate of bone growth by implanting in place.

Another object of the present invention, the fixing portion, by increasing the coupling force between the implant and the tissue of the treatment through a structure protruding outside the implant to prevent displacement or detachment of the implant inserted in the treatment target after surgery to improve the resilience of the treatment target The height is to provide a porous intervertebral fusion implant with an improved fixation comprising a protrusion.

Another object of the present invention, the protrusion is configured to include a fixing part supporting frame for supporting a porous structure of the protruding shape, the deformation of the porous portion of weak strength in the process of inserting the implant between the vertebral bone to be treated It is to provide a porous intervertebral fusion implant with an improved fixation to prevent or breakage, and to prevent deformation or breakage of the porous portion due to the movement of the treatment object after surgery.

Still another object of the present invention, the plurality of protrusions are arranged in a predetermined interval of the thread shape, to evenly distribute the resistance to the force applied in the horizontal direction of the implant to maximize the coupling force of the implant inside the treatment object, It is to provide a porous intervertebral fusion implant with improved fixation.

Another object of the present invention, the screw thread is perpendicular to the surface direction of the bone growth portion, the vertical portion for securing the fixing force in the opposite direction of the insertion of the implant, the insertion of the implant by forming a constant inclination in the form of a straight line or curve SUMMARY OF THE INVENTION It is to provide a porous intervertebral fusion implant with an improved fixation portion, including a fixation portion having an inclination portion that facilitates the insertion of the implant by minimizing the frictional force in the direction of time entry.

Still another object of the present invention is to provide an improved fixing part for securing a predetermined fixing force while minimizing bone damage of a patient by including a flat horizontal portion in the direction of the surface of the bone growth part at the end of the protruding screw thread. It is to provide a porous intervertebral fusion implant.

Still another object of the present invention is that the screw thread is porous intervertebral fusion with an improved fixation portion, which minimizes the bone damage of the patient by the corner portion of the inclined portion and the horizontal portion in the form of a curved corner. It is to provide an implant.

Another object of the present invention, the fixing portion is located on the upper and lower sides of the bone growth portion, evenly distributed up and down the fixing force by the fixing portion, characterized in that the close coupling with the upper and lower vertebral bone of the implant, improvement It is to provide a porous intervertebral fusion implant with a fixed fixture.

Another object of the present invention, the fixing portion, the porous structure protrudes than the fixing support frame to prevent the bone damage of the treatment target due to the direct contact between the fixing support frame and the bone of the treatment object to increase the surface area of the porous structure It is to provide a porous intervertebral fusion implant with improved bone growth rate of the treatment.

Another object of the present invention, the fixing portion support frame portion, surrounding the outer peripheral surface of the protruding porous structure to prevent deformation or breakage of the porous structure and maximize the exposed surface of the porous structure to increase the bone growth rate of the treatment target To provide a porous intervertebral fusion implant, characterized in that consisting of a linear member.

Still another object of the present invention is a porous intervertebral disc with an improved fixing part, characterized in that the fixing part supporting frame part is made of non-porous material which is impermeable to radiation to facilitate positioning of the implant fixing part. To provide a fusion implant.

Still another object of the present invention is to provide a fixed part supporting frame part having a shape complementary to the contour of the bone growth part, to evenly distribute the fixing force of the implant and improve the coupling force with the spinal bone It is to provide a porous intervertebral fusion implant.

Another object of the present invention, the bone growth portion, the bone insertion hole is formed on one surface of the vertebral fusion implant so that the bone graft can be inserted into the vertebral fusion implant in communication with the bone insertion space in which the bone graft is inserted To provide a porous intervertebral fusion implant with an improved fixation, comprising.

Another object of the present invention, the bone growth unit, including a through hole formed so as to penetrate the other surface from one side to observe the growth of the bone, the state of fusion (Fusion) of the adjacent vertebral bone in contact with the implant after surgery It is to provide a porous intervertebral fusion implant with improved fixation that allows for easy viewing.

Still another object of the present invention, the bone growth unit, including a cover for covering the through hole to prevent the separation of bone graft fragments inside the through hole, the bone graft fragment after surgery through the through hole into the body of the treatment subject It is to provide a porous intervertebral fusion implant with improved fixation that prevents escape.

Another object of the present invention, the cover portion, including the mesh portion to prevent the departure of the bone graft in the bone insertion space and to form a gap for observing the growth of the bone, the bone inside the bone growth portion through the void portion of the mesh The present invention provides a porous intervertebral fusion implant with an improved fixation part for observing the growth of the bone growth site and releasing the bone graft fragments, while observing the growth of the bone.

The present invention is implemented by the embodiment having the following configuration to achieve the above object.

According to an embodiment of the invention, comprising a porous bone growth portion to replace the space between the adjacent vertebral bone, including a fixing portion for fixing the position of the implant inserted in the space between the bone growth portion and the vertebrae, It promotes bone growth through the bone growth part with multiple holes so that neighboring vertebral bones can be coalesced as soon as possible and maximizes the fixation force of the implant inside the body after the surgery to increase the growth rate of the bone growth part. It is done.

According to another embodiment of the present invention, the fixing unit, by increasing the binding force or fixing force between the implant and the tissue of the treatment through a structure protruding out of the implant to prevent displacement or departure of the implant inserted into the treatment target after the treatment It characterized in that it comprises a protrusion for increasing the resilience of the subject.

According to another embodiment of the present invention, the protrusion part is configured to include a fixing part supporting frame for supporting the porous structure of the protruding shape, the porous portion of the strength is weak in the process of inserting the implant between the bone of the treatment target To prevent deformation or breakage, and to prevent deformation or breakage of the porous portion due to the movement of the treatment target after surgery.

According to another embodiment of the present invention, the plurality of protrusions, the shape of the thread is arranged at a regular interval, to evenly distribute the resistance to the force applied in the horizontal direction of the implant to maximize the coupling force of the implant inside the treatment target Characterized in that.

According to another embodiment of the present invention, the screw thread is perpendicular to the surface direction of the bone growth portion, the vertical portion 513a for securing the fixing force in the opposite direction of the insertion of the implant, and a constant inclination in the form of a straight line or a curve or the like. It is characterized in that it comprises a fixing portion having a slanted portion to facilitate the insertion of the implant by minimizing the frictional force in the pulling direction during the insertion of the implant.

According to another embodiment of the present invention, the screw thread is characterized in that it comprises a flat horizontal portion in the direction of the surface of the bone growth section at the end of the protruding screw thread to secure a predetermined fixing force while minimizing bone damage to the patient.

According to another embodiment of the present invention, the thread is characterized in that the edge of the inclined portion and the horizontal portion has a curved shape to minimize the bone damage of the patient due to the corner portion where both sides meet.

According to another embodiment of the present invention, the fixing unit is located on the upper and lower sides of the bone growth unit, it is characterized in that the tightly distributed by the fixing unit up and down evenly coupled to the upper and lower vertebral bone of the implant. .

According to another embodiment of the present invention, the fixing portion, the porous structure protrudes than the fixing support frame to prevent bone damage of the treatment target due to direct contact between the fixing support frame and the bone of the treatment object and the surface area of the porous structure It is characterized by increasing the bone growth rate of the treatment target.

According to another embodiment of the present invention, the fixing part fixing support frame surrounds the outer circumferential surface of the protruding porous structure and prevents deformation or breakage of the porous structure and maximizes the exposed surface of the porous structure to increase bone growth rate of the treatment target. To increase the, characterized in that consisting of a linear member.

According to another embodiment of the present invention, the fixing part supporting frame portion is characterized in that the non-porous to the radiation impermeable, to facilitate the positioning of the implant fixing portion.

According to another embodiment of the present invention, the fixing portion supporting frame portion is configured to have a shape complementary to the contour of the bone growth portion, it is characterized in that evenly distribute the fixing force of the implant and improve the coupling force with the spinal bone. .

According to another embodiment of the present invention, the bone growth portion is formed on one surface of the vertebral fusion implant so that the bone graft can be inserted into the vertebral fusion implant, the bone insertion space is in communication with the bone insertion space is inserted It characterized in that it comprises a hole.

According to another embodiment of the present invention, the bone growth portion, including a through hole formed to penetrate the other surface from one side to observe the growth of the bone, the union of the adjacent vertebral bone (Fusion) in contact with the implant after surgery It is characterized in that the state can be easily observed.

According to another embodiment of the present invention, the bone growth unit, including a cover for covering the through hole to prevent the separation of bone graft fragments in the through hole, the bone graft fragment after surgery through the through hole body To prevent it from going inside.

According to another embodiment of the present invention, the cover portion, including a mesh to form a gap for preventing the departure of the bone graft within the bone insertion space and observe the growth of the bone, the bone growth portion through the void portion of the mesh Observing the growth of the bone and the mesh shape of the bone during the irradiation of the bone growth portion is easy to locate and characterized in that it prevents the departure of bone graft fragments.

The present invention can obtain the following effects by the configuration, combination, and use relationship described above with the present embodiment.

The present invention includes a porous bone growth portion that replaces the space between neighboring vertebral bones, and includes a fixing portion for fixing the position of the implant inserted in the space between the bone growth portion and the vertebral bone, Improved fixation, which promotes bone growth through the bone growth zone, which allows the adjacent vertebral bones to coalesce in a short time, and maximizes the fixation force of the implant within the body after the surgery, thereby increasing the growth rate of the bone growth zone. It has the effect of providing a porous intervertebral fusion implant.

The present invention, the fixing portion, by increasing the bonding force between the implant and the tissue of the treatment through the structure protruding out of the implant to prevent displacement or detachment of the implant inserted into the treatment after surgery to increase the resilience of the treatment target It has the effect of providing a porous intervertebral fusion implant with improved fixation.

The present invention, the protrusion is configured to include a fixing part support frame for supporting a porous structure of the protruding shape, to prevent deformation or breakage of the weakly porous portion in the process of the implant is inserted between the vertebral bone of the treatment target And it has the effect of providing a porous intervertebral fusion implant with an improved fixation, which prevents deformation or breakage of the porous portion due to the movement of the subject after surgery.

The present invention, the protrusion, the shape of the thread is arranged in a plurality at regular intervals, the improved fixing portion to maximize the coupling force of the implant within the treatment object by evenly distributing the resistance to the force applied in the horizontal direction of the implant It has the effect of providing a porous intervertebral fusion implant with.

According to the present invention, the screw thread is perpendicular to the surface direction of the bone growth portion and has a vertical portion for securing resistance against the opposite direction of the implant insertion, and forms a constant inclination in the form of a straight line or a curve to the insertion direction when the implant is inserted. It has the effect of providing a porous intervertebral fusion implant with an improved fixation portion, including a fixation portion having a slope that facilitates retraction of the implant by minimizing the frictional force on the implant.

The present invention provides a porous intervertebral fusion implant with an improved fixation portion, wherein the screw thread includes a flat horizontal portion at the end of the protruding thread to secure a predetermined fixation force while minimizing bone damage to a patient. Has the effect of providing.

The present invention provides a porous intervertebral fusion implant with an improved fixation portion, in which the edges of the inclined portion and the horizontal portion have a curved shape to minimize bone damage of the patient by the corner portions where both sides meet. Has an effect.

According to the present invention, the fixed part is located on the upper and lower sides of the bone growth part, and evenly distributes the fixing force by the fixing part up and down to closely couple with the upper and lower vertebral bones of the implant. It has the effect of providing a porous intervertebral fusion implant.

The present invention, the fixed portion, the porous structure protrudes than the fixed support frame to prevent the bone damage of the treatment target due to the direct contact between the fixed support frame and the bone of the treatment target to increase the surface area of the porous structure bone of the treatment target It has the effect of providing a porous intervertebral fusion implant with improved fixation, which improves the growth rate.

The present invention, the fixing portion support frame portion, the linear member that surrounds the outer peripheral surface of the protruding porous structure to prevent deformation or breakage of the porous structure and maximize the exposed surface of the porous structure to increase the bone growth rate of the treatment target Characterized in that it has the effect of providing a porous intervertebral fusion implant with improved fixation.

The present invention provides a porous intervertebral fusion implant with an improved fixation portion, characterized in that the fixation support frame portion is made of non-porous material to which radiation is impermeable to facilitate positioning of the implant fixation portion. Has the effect of

The present invention provides a porous intervertebral disc with an improved fixation part, which is configured to have a shape complementary to the contour of the bone growth part, to evenly distribute the fixation force of the implant and improve the cohesion with the vertebral bone. Has the effect of providing a fusion implant.

The present invention, the bone growth portion is improved, including a bone insertion hole is formed on one surface of the vertebral fusion implant so as to insert the bone graft in the vertebral fusion implant in communication with the bone insertion space into which the bone graft is inserted It has the effect of providing a porous intervertebral fusion implant with a fixed fixture.

The present invention, the bone growth unit, including a through hole formed so as to penetrate the other surface from one side to observe the growth of the bone, it is easy to observe the union (Fusion) state of the adjacent vertebral bone in contact with the implant after surgery Which has the effect of providing a porous intervertebral fusion implant with improved fixation.

The present invention, the bone growth portion, including a cover to cover the through-holes to prevent the separation of bone graft fragments in the through-holes, to prevent the bone graft fragments from going through the through-holes through the through-holes inside the body of the treatment subject Has the effect of providing a porous intervertebral fusion implant with improved fixation.

The present invention, the cover portion, including the mesh to prevent the separation of the bone graft within the bone insertion space and form a gap for observing the growth of the bone, observe the growth of bone inside the bone growth portion through the gap of the mesh And it has the effect of providing a porous intervertebral fusion implant with an improved fixation portion, which facilitates the positioning of the bone growth portion at the time of irradiation in the mesh shape and at the same time prevent the departure of the bone graft fragments.

1 is a perspective view of a spinal cage of a porous structure of the prior art.
Figure 2 is a front perspective view of an implant that is an embodiment of the present invention
3 is a perspective exploded view of FIG. 2;
4 is a perspective view of a frame portion and a support portion of the frame of the intervertebral fusion implant with an improved fixation is another embodiment of the present invention.
5 is a left side view of FIG. 2;
6 is a detailed view of a fixture of a porous intervertebral fusion implant with an improved fixture that is another embodiment of the present invention.
7 is a detailed view of a fixture of a porous intervertebral fusion implant with an improved fixture of another embodiment of the present invention.
8 is a detailed view of a fixture of a porous intervertebral fusion implant with an improved fixture that is another embodiment of the present invention.
9 is a detailed view of a fixture of a porous intervertebral fusion implant with an improved fixture of another embodiment of the present invention.
10 is a detailed view of a fixture of a porous intervertebral fusion implant with an improved fixture of another embodiment of the present invention.
11 is a perspective view of a porous intervertebral fusion implant with an improved fixation that is another embodiment of the present invention.
12 is a rear perspective view of a porous intervertebral fusion implant with an improved fixation that is another embodiment of the present invention.
Figure 12 is a state of use of a porous intervertebral fusion implant with an improved fixing is another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the porous intervertebral fusion implant with improved fixing according to the present invention will be described in detail. In the following description of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Unless otherwise defined, all terms in this specification are equivalent to the general meaning of the terms understood by those of ordinary skill in the art to which the present invention pertains, and in case of conflict with the meaning of the terms used herein Follow the definitions used in the specification. In describing the embodiments of the present invention, the position and movement of each component are defined according to the directions indicated by the arrows in each drawing, and are separately defined in the text as necessary.

2 and 3 are a perspective view and an exploded perspective view of the lumbar vertebral fusion implant having a porous structure, respectively, an embodiment of the present invention. Referring to Figure 2, the vertebral vertebral fusion implant (1) having a porous structure of the present invention is bone growth portion 10, frame portion 30, fixed portion 50, cover portion 70, coupling portion 80 ).

The bone growth portion 10 is configured to have a shape complementary to the space shape between neighboring vertebral bones, and preferably has a porous structure. The intervertebral fusion implant 1 with an improved fixation part is inserted into the space between the vertebral bones from which the disc is removed and is fixed, so that the vertebral bones in the fixed position can be fixed closely between the vertebral bones without being spaced apart. It is preferable to have a shape complementary to the shape of the inner space therebetween.

The modulus of elasticity (Young's Modulus) refers to the proportional constant at which the stress and strain within the elastic limit are directly proportional (Hook's law). Therefore, the larger the modulus of elasticity, the smaller the deformation, and the smaller the deformation, the stronger the material. On the contrary, the smaller the modulus of elasticity, the more deformation, and the more deformation, the weaker the strength of the material.

Intervertebral fusion implant (1) with improved fixation with strong strength when intervertebral fusion implant (1) with improved fixation with a large modulus of elasticity relative to the patient's bone Stress shielding to reduce the bone density of the patient (Stress Shielding), bone sinking (Sinking Down), etc. may occur, the elastic modulus of the intervertebral fusion implant (1) having an improved fixing part Is preferably configured to approach the elastic modulus of the bone of the patient.

The bone growth unit 10 may be supported by the frame unit 30, which will be described later, and refers to a composition of porous through which radiation is transmitted. As will be described later, the frame portion 30 is impermeable to radiation, and the bone growth portion 10 is transmitted through the air gap 10a to be described later, the transmission and impermeability of the radiation is clearly distinguished and improved Positioning of the intervertebral fusion implant 1 with the fixed part is facilitated. The bone growth portion 10 is composed of a gap (10a) and a mesh (10b).

The pore 10a is a concept for collectively referring to empty spaces of the bone growth part 10 having a porous structure through which irradiated radiation is transmitted as it is. The voids 10a may be configured to be randomly formed on any position of the bone growth portion 10, but preferably may be arranged in a uniform form. The shape of the void 10a is not limited to a specific concept, and may be configured in any form as long as it can transmit radiation as it is.

The mesh 10b refers to a configuration forming the void 10a and forming the overall appearance of the bone growth portion 10, and the void 10a may be provided through the mesh 10b. The bone growth portion 10 is transmitted through the pore (10a), the radiation, when the mesh 10b is also made of a material with high radiation transmittance, the separation of the gap (10a) and the mesh (10b) is unclear As the bar is preferably, the mesh 10b may be made of a material through which radiation is not transmitted.

The intervertebral fusion implant 1 with the improved fixation part may be composed of only the bone growth part 10 without the configuration of the frame part 30 to be described later. When the intervertebral fusion implant 1 having an improved fixation part is formed only by the bone growth part 10, the intervertebral fusion implant 1 having the improved fixation part forms an air gap 10a as a whole. As the bone grows through the pores 10a, it is possible to further promote the coupling between neighboring vertebral bones.

However, when constituting the intervertebral fusion implant 1 having an improved fixation part with only the bone growth part 10, the growth rate of the bone can be maximized, but the intervertebral fusion implant 1 with the improved fixation part itself. Barrier rigidity problem may occur, this problem is to be solved through the frame unit 30 to be described later. A more detailed description will be given when describing the frame unit 30. The bone growth portion 10 includes a head portion 11, a body portion 13, a protective rim 15.

The head 11 refers to a portion that is reduced toward the end on the bone growth portion 10 to facilitate insertion of the intervertebral fusion implant 1 having an improved fixation between neighboring vertebral bones. Surgery of the intervertebral fusion implant (1) with improved fixation is directed to minimizing damage to the surrounding tissues of the patient's skin, bones, and the like. Inserting the intervertebral fusion implant 1 with an improved fixation on a planned in situ can be difficult. In particular, when the outside of the intervertebral fusion implant 1 with an improved fixation part is formed of the bone growth part 10 to form a rough surface, the intervertebral fusion implant 1 with an improved fixation part due to frictional force Makes the insertion more difficult. Accordingly, one end of the bone growth portion 10 inserted between the vertebral bones is reduced in diameter toward the end portion, thereby making it easier to insert the intervertebral fusion implant 1 having an improved fixation portion.

The body portion 13 refers to a configuration extending from the head portion 11 to contact neighboring vertebral bones. The body portion 13 may be configured such that the overall shape is convex upward and downward. This is due to the anatomical shape of the inner space between the vertebral bones of the patient, the body portion 13 may be different in shape depending on the patient. Such a shape may be implemented by 3D scanning of a patient's vertebral bone and 3D printing through product modeling.

While the head portion 11 has a function for insertion of the intervertebral fusion implant 1 with an improved fixation part, after the intervertebral fusion implant 1 with the improved fixation part is positioned in position, It is supported by the body portion 13. The body 13 includes a through hole 131, a bone insertion hole 133, and a bone insertion space 135.

The through hole 131 refers to a configuration formed to penetrate the other surface from one surface of the body portion 13 so that the growth of the bone can be observed. The plurality of through holes 131 may be formed on the bone growth portion 10, and preferably, each through hole 131 formed on upper and lower sides and left and right sides of the bone growth portion 10. Can be configured to communicate with each other.

The bone insertion hole 133 is an intervertebral fusion implant 1 having an improved fixation portion for inserting a bone graft into the inside of the intervertebral fusion implant 1 having an improved fixation portion 1. It is formed on one surface of the configuration and communicates with the bone insertion space 135 to be described later, preferably, the bone insertion hole 133 is the upper and / or lower surface of the intervertebral fusion implant (1) having an improved fixing portion It can be formed on.

The shape of the bone insertion hole 133 is not limited thereto. According to the contents shown in FIG. 2, the bone insertion hole 133 is shown to have a long shape back and forth along the longitudinal direction of the intervertebral fusion implant 1 having the improved fixing part. ) Is not necessarily limited to this concept, and may be configured in various forms as long as it can perform the above functions.

The bone insertion space 135 refers to the inner void space of the intervertebral fusion implant 1 with an improved fixation portion in which the bone graft is filled. The bone insertion space 135 is in communication with the above-described bone insertion hole 133, the surgeon is intervertebral fusion having an improved fixing portion of the bone graft (Bone Graft) through the bone insertion hole 133 It is possible to fill in the bone insertion space 135 of the implant (1).

The bone insertion space 135 may form an inner space by vertically extending the bone insertion hole 133 while maintaining the plane shape of the bone insertion hole 133 as it is, although not shown, the plane of the bone insertion hole 133 It can be seen that it includes all the various concepts, such as maintaining the shape to a predetermined depth, but can be configured in such a way that the size is enlarged.

Intervertebral fusion with improved fixation through the bone insertion hole 133 formed on one surface of the intervertebral fusion implant 1 having an improved fixation and communicating with the bone insertion space 135 into which the bone graft is inserted. When trying to put the bone graft on the inside of the implant (1), it may be difficult to insert the bone graft due to the bone growth portion 10 having a somewhat rough surface output by 3D printing. In addition, the end of the bone growth portion 10 may be bent or broken in the process of inserting the bone graft. Therefore, the present invention is characterized in that the protective rim 15 is configured on the bone insertion hole 133.

The protective rim 15 is configured to surround an end portion of the bone growth portion 10 exposed on the bone insertion hole 133, and preferably, of the bone growth portion 10 exposed on the bone insertion hole 133. It may have a shape complementary to the end face. As shown in FIG. 4, the protective rim 15 may be formed in a strip shape of a plate shape to cover an end surface of the bone growth part 10 exposed on the bone insertion hole 133. When the bone graft is to be inserted through the bone insertion hole 133 through this, a surgical instrument or the like is applied to the end of the bone growth part 10 exposed on the bone insertion hole 133 in the surgical process, or Damage to the end portion of the bone growth portion 10 exposed on the bone insertion hole 133 is bent or broken can be prevented. The protective rim 15 includes a bone formation hole 151.

The bone formation hole 151 refers to a configuration formed to penetrate the other surface on one surface of the protective rim 15. When the protective rim 15 is formed in the bone insertion hole 133 formed on the porous bone growth portion 10 to smooth the surface thereof, insertion of a bone graft may be facilitated, but a surface may be formed. The problem of inferior bone growth efficiency as much as a portion may occur. In order to solve this problem, by configuring the bone formation hole 151 on the protective rim 15, it is possible to promote bone growth through the empty space that the bone formation hole 151. Such bone formation hole 151 A plurality of) may be formed along the surface of the protective rim 15. 2, the bone formation hole 151 is regularly arranged on the protection rim 15 at regular intervals in a circular shape, but the bone formation hole 151 is not limited to this concept. The protective rim 15 may be freely disposed on any position in various forms.

Figure 4 is a perspective view of the frame portion of the lumbar vertebral fusion implant with a porous structure which is an embodiment of the present invention. Referring to FIG. 4, the frame part 30 includes the first support frame 31, the second support frame 33, and the load support frame 35.

As described above, it may be considered that the intervertebral fusion implant 1 having the improved spine of the porous structure is composed of only the bone growth part 10, but in this case, the intervertebral fusion with the improved fixation part is considered. The problem that the rigidity of the implant 1 weakens arises. Therefore, as shown in Figure 4, the bone growth portion 10 is configured to have a shape complementary to the space shape between the adjacent vertebral bone, while being formed to support such bone growth portion 10 is improved A frame portion 30 expressing the overall strength of the intervertebral fusion implant 1 with a government may be added.

The frame portion 30 refers to a configuration that expresses the strength of the intervertebral fusion implant 1 having an improved fixation portion formed to support the bone growth portion 10. As described above, the intervertebral fusion implant 1 with the improved fixation portion is composed of only the bone growth portion 10 composed of the pores 10a and the mesh 10b, but can increase the growth rate of the bone, It may not have enough rigidity to withstand the loads from the spine. This problem is solved by constructing the frame portion 30 capable of expressing strength in the bone growth portion 10. Preferably, the frame part 30 may be made of a living metal (titanium, titanium alloy, cobalt chromium, magnesium) or the like for expressing a predetermined strength.

The frame portion 30 is composed of a non-porous material through which radiation is impermeable, and the bone growth portion 10 made of porous material passes the radiation as it is through the pore 10a as it is irradiated. ), And the radiation is impermeable to the dark portion is distinguished by the frame portion 30 to be recognized. This facilitates positioning of the intervertebral fusion implant 1 with an improved fixation.

The frame portion 30 may have a shape complementary to the contour of the bone growth portion 10, it is composed of a linear member or a plate-like member. The linear member is not only a linear member, but also includes a curved member, and may be considered to be a concept that collectively refers to a member having a length longer than the width. Thus, when the frame part 30 is constructed through such a linear member, the finished frame part 30 does not form a surface, and the edges of the intervertebral fusion implant 1 having an improved fixing part to be used for surgery are provided. While having a shape substantially the same as the connected form, as shown in Figure 4, it can form an empty space in communication with the front and rear, up and down, left and right, and the bone growth portion 10 on the empty space Can be filled. The plate-shaped member, unlike the linear member, means that the frame portion 30 forms a surface. When the frame portion 30 is formed in a plate shape, the outer surface of the intervertebral fusion implant 1 having the improved fixing portion can be configured smoothly, in which case the bone growth portion 10 of the somewhat rough surface is improved. It is not exposed to the outside of the intervertebral fusion implant 1 with a fixed fixation, thereby reducing the frictional force when inserting the intervertebral fusion implant 1 with an improved fixation between the vertebral bones Easy insertion of the intervertebral fusion implant 1 provided can be achieved.

The frame part 30 includes a first support frame 31, a second support frame 33, and a load support frame 35.

The first support frame 31 refers to a configuration having a shape complementary to the contour of the head portion 11 of the bone growth portion 10. The first support frame 31 is characterized in that the head portion 11 of the bone growth portion 10 has a shape that is reduced toward the end portion so as to facilitate insertion of the intervertebral fusion implant 1 having an improved fixation portion. ) May also have a structure that is reduced toward the end.

The first support frame 31 may be configured to be exposed to the outside of the bone growth portion 10, the bone growth portion 10 is wrapped around the outside of the first support frame 31 first support The frame 31 may be configured to not be exposed to the outside. However, in order to easily insert the intervertebral fusion implant 1 with the improved fixation into the space between neighboring vertebral bones, as shown in FIG. As such, the first support frame 31 having a smooth surface may be configured to be exposed to the outside of the bone growth part 10.

Exposing the entire head portion 11 of the bone growth portion 10 to the outside may be effective in terms of bone growth, but 3D printing when inserting the intervertebral fusion implant 1 with improved fixation between the vertebral bones Since the vertebral bone is scratched by the bone growth portion 10 of the rather rough surface, it may be difficult to introduce the intervertebral fusion implant 1 having the improved fixation portion, thereby configuring the first support frame 31. By exposing to the outside, the insertion of the intervertebral fusion implant 1 with the improved fixation can be facilitated.

When the first support frame 31 is composed of a linear member having a shape complementary to the shape of the head portion 11 of the bone growth portion 10, the tip portion of the head portion 11, which is reduced toward the end portion, is the spine. As the first entry into the space between the bones, the portions must be easily inserted into the vertebral spinal fusion implant having a porous structure while naturally opening between the spine bone, as shown in Figure 4 bone growth portion (10) Covering the tip of the head portion 11 of the) can be configured to the inlet surface 311 to facilitate the initial insertion of the vertebral vertebral fusion implant with a porous structure.

The second support frame 33 refers to a configuration having a shape complementary to the contour of the body portion 13 of the bone growth portion 10. Complementary shapes are preferably viewed in a broad concept including not only identical shapes but also substantially identical shapes. The second support frame 33 is configured to support the body portion 13 and express the strength of the intervertebral fusion implant 1 having an improved fixation portion. As shown in FIG. 5, the second support frame 33 may be configured to be exposed to the outside of the bone growth part 10, and, conversely, the bone growth inside the bone growth part 10. It may be configured to support the portion 10, one part is exposed to the outside of the bone growth portion 10 and the other part may include all the various concepts such as may be located inside the bone growth portion (10) .

When the second support frame 33 is configured to be positioned inside the bone growth portion 10, when the intervertebral fusion implant 1 having an improved fixation portion is inserted between the vertebral bones, the vertebral bones and bones As the area in contact with the growth portion 10 becomes relatively large, it is possible to further promote bone growth. However, the porous bone growth portion 10 has a relatively low rigidity, the overall rigidity of the vertebral vertebral fusion implant having a porous structure is reduced.

Therefore, whether the second support frame 33 is positioned inside the bone growth portion 10 or exposed to the outside of the bone growth portion 10, an improved fixation portion focused on promoting bone growth. It may vary depending on whether to configure the intervertebral fusion implant 1 having an interlock fusion implant 1 with an improved fixation focusing on securing rigidity.

The load supporting frame 35 supports the load applied to the intervertebral fusion implant 1 having an improved fixation part exposed to the outside of the bone growth part 10, thereby improving the spine improved fixation part of the porous structure. The structure which improves the load resistance of the provided intervertebral fusion implant 1 is said. The shape of the load supporting frame 35 is not limited to a specific concept, and may include all of various concepts such as a plate or a linear member.

The load supporting frame 35 has a higher density than the bone growth part 10 of the porous structure, and the force is directed toward the relatively high load supporting frame 35 due to the difference in density. This phenomenon prevents the force from being drawn to the bone growth portion 10 having a relatively weak strength, and the force acting on the intervertebral fusion implant 1 having the improved fixing portion is supported by the load supporting frame 35. By making this dedicated, even when the porous bone growth portion 10 is configured, the overall rigidity of the intervertebral fusion implant 1 having the improved fixing portion can be obtained.

The load resistance of the intervertebral fusion implant 1 with the improved fixing part may vary as the size, thickness, constituent material, etc. of the load supporting frame 35 change. Therefore, in the case of a patient who weighs a lot, the load transmitted through the vertebral bone may be greater than that of the usual bar, and the intervertebral fusion implant having an improved fixing part by increasing the thickness of the load supporting frame 35 and the like (1) In contrast, in the case of a patient who weighs less, the load transmitted through the vertebral bone may be smaller than that of the patient. Therefore, the thickness of the load supporting frame 35 may be reduced, thereby improving the predetermined rigidity. The intervertebral fusion implant 1 with the government may be advantageous in terms of cost by reducing the weight of the intervertebral fusion implant 1 with the improved fixing part while securing the rigidity.

The load supporting frame 35 includes a first load supporting frame 351 and a second load supporting frame 353.

The first load supporting frame 351 and the second load supporting frame 353 are named differently to distinguish them according to the position at which the load supporting frame 35 is formed, and the description of the above-described load supporting frame 35 The same applies to each of the first load support frame 351 and the second load support frame 353.

The first load supporting frame 351 refers to a configuration for forming a first step S1 and connecting the first supporting frame 31 and the second supporting frame 33 to each other. A first load support frame 351 is formed between the first support frame 31 and the second support frame 33 so that the first load support frame 351 is exposed to the outside of the bone growth part 10. As a result, the first load supporting frame 351 bears the load entirely. As a result, the ratio of the bone growth portion 10 can be increased at the portion where the intervertebral fusion implant 1 having the vertebral bone and the improved fixation portion abuts, and the first load supporting frame 351 supports the load and thus the external force It is possible to prevent the bone growth portion 10 due to deformation.

The first step S1 connects an end portion of the first support frame 31 on the enlarged side by the first load support frame 351, and the second support frame 33 is formed on the side of the enlarged side. When formed smaller than the size corresponding to the end of the first support frame 31, that is, the first support frame 31 is exposed to the outside of the bone growth portion 10, the second support frame 33 is It is formed when located inside the bone growth portion (10).

When the bone graft (B) is inserted into the intervertebral bone with the intervertebral fusion implant 1 having an improved fixation part, the bone growth part 10 contacts the vertebral bone, while the load transmitted from the vertebral bone is relatively As a result, the load may be concentrated on the first load supporting frame 351 having a high density, and thus, there is no fear that deformation due to the load of the bone growth part 10 may occur.

The second load supporting frame 353 is a surgical instrument used for manipulating the intervertebral fusion implant 1 having a second step S2 and having the second supporting frame 31 and an improved fixing part. Refers to a configuration for connecting the coupling portion 80 to be connected.

If only a single first load supporting frame 351 is to be configured to bear the load transmitted from the vertebral bone, an intervertebral fusion implant 1 having an improved fixation of a longitudinally long shape is preferably shown, as shown. It may not be able to efficiently support the load transmitted to).

Thus, a first load support frame (1) may be provided on each of the front and rear sides of the intervertebral fusion implant 1 having the improved fixing portion so as to efficiently support the load transmitted to the intervertebral fusion implant 1 having the improved fixing portion. 351 and the second load supporting frame 353 may be configured.

The plurality of load supporting frames 35 allow the load to be distributed to each of the first load supporting frame 351 and the second load supporting frame 353, and the intervertebral fusion implant having an improved fixing part 1 ) Can increase the safety against the load. The number of load supporting frames 35 is not limited to a specific concept, and may be variously configured.

The load transmitted through the vertebral bone is directed to the first load supporting frame 351 and the second load supporting frame 353 to prevent deformation of the bone growth part 10 and the like. As the frame 351 is configured, not only the first step S1 having a predetermined height but also the second load supporting frame 353 are formed between the first support frame 31 and the second support frame 33. A second step S2 having a predetermined height may also be formed between the two support frames 33 and the coupling part 80.

When the intervertebral fusion implant 1 with an improved fixation is inserted between the vertebral bones, the first load support frame 351 and the second load support are not applied directly to the bone growth portion 10. The load can be concentrated in the frame 353.

When the intervertebral fusion implant 1 having an improved fixation part including the bone graft B is inserted into the place between the vertebral bones S intended by the surgeon, the first load supporting frame 351 and the first 2, the load supporting frame 353 bears the load transmitted from the vertebral bone S, and the bone growth portion 10 does not directly receive the load transmitted from the vertebral bone, so that deformation due to the load may occur. There is no concern. While the bone growth portion 10 is in contact with the vertebral bone, the union of the vertebral bone can be promoted.

Referring to FIG. 4, in the intervertebral fusion implant 1 having the improved fixing part, the inner portion of the first load supporting frame 351 is directed toward the front side of the intervertebral fusion implant 1 having the improved fixing part. It is characterized by curvature. Through this configuration, while maintaining the protective effect of the bone growth portion 10 through the first load supporting frame 351, it is possible to obtain the effect of widening the portion that can confirm the growth of the bone. In addition, the bone growth portion 10 constituting the intervertebral fusion implant 1 with the improved fixation portion in order to confirm the bone growth of the patient from the intervertebral fusion implant 1 with the improved fixation portion is The size of the pores may vary. The outer surface of the bone growth portion 10 is not in contact with all of the neighboring vertebral bone into which the intervertebral fusion implant 1 with the improved fixation is inserted, preferably with the intervertebral with the improved fixation. Only the upper and lower sides of the fusion implant 1 are in contact with the vertebral bone. Therefore, the promotion of bone growth may be most important in the area where the intervertebral fusion implant 1 with improved fixation and the vertebral bone are in contact. That is, the size of the voids 10a of the upper and lower bone growth portions 10 which are in contact with the vertebral bone is made smaller than the size of the voids 10a of the bone growth portions 10 of the inner side, The size of the voids 10a of the bone growth portion 10 of the inner portion that is not in contact with each other is larger than the size of the voids 10a of the bone growth portions 10 of the upper and lower portions. The change in pore 10a size is adapted to the vertical change in that only the upper and lower surfaces of the intervertebral fusion implant 1 with improved fixation contact the vertebral bone. This vertical change divides the bone growth portion 10 into an upper portion, an inner portion, and a lower portion, and the upper portion defines an area from an upper surface of the intervertebral fusion implant 1 having an improved fixing portion to a predetermined depth inwardly. The lower part may be regarded as a certain area from the lower surface of the intervertebral fusion implant 1 having the improved fixing part to a predetermined depth inward, and the inner part means the remaining part except the upper part and the lower part.

According to the contents shown in FIG. 2, the boundary between the upper side and the inner side, and the boundary between the lower side and the inner side are clearly distinguished through the difference of the gaps 10a, but the present invention is not limited to these embodiments. From the upper side of the intervertebral fusion implant 1 with the fixed fixing part, the cavity 10a of the bone growth part 10 gradually grows toward the inside, and the intervertebral fusion implant 1 with the improved fixing part is provided. By gradually increasing the gap 10a of the bone growth portion 10 from the lower side to the inside, the concept of naturally changing the gap 10a may be included. Even in this case, the size of the pores 10a of the inner portion of the bone growth portion 10 is preferably such that the size of the bone growth inside the intervertebral fusion implant 1 with the improved fixing portion can be observed. . Even more preferably, the cover portion 70 to be described later is configured to cover the inlet portion of the bone through hole 131 penetrating the inner portion of the porous structure with the mesh portion 71 to facilitate bone growth therein. It can also be observed.

5 is a side view of an intervertebral fusion implant with an improved fixation that is one embodiment of the present invention. Referring to FIG. 5, the fixing part 50 of the intervertebral fusion implant 1 with the improved fixing part of the present invention is composed of a protrusion 51, which in turn is a thread 511 and a fixing part supporting frame. 513 is comprised.

When the implant 1 is inserted between the vertebral bones of the patient, the implant 1 should be seated in place as planned during surgery until the bone grows. Otherwise, implantation or displacement may slow bone growth and damage the vertebral tissue around the implant, causing complications and in some cases require reoperation. In order to prevent these problems, it is necessary to increase the frictional force of the surface of the implant (1) to improve the fixation force of the implant inside the treatment target after surgery.

A frictional force is a force that hinders the movement of an object between the contact surfaces of two objects. The coefficient of friction is not the inherent nature of the material, but rather the contact with which material in what surface state of an object, and is a phenomenological quantity determined through experiments. The frictional force f is proportional to the force W for vertically pushing the contact surface, and the proportional constant μ at that time is called a friction coefficient.

The magnitude of the frictional force is proportional to the normal drag, and the proportional constant is the coefficient of friction. Therefore, when the same normal force acts, the larger the friction coefficient, the larger the magnitude of the friction force. When the magnitude of the friction force is f, the normal force is N, and the coefficient of friction is mu (mu; mu), the relationship of f = μN is established. The coefficient of friction, which indicates the degree of friction, depends on the material of the object, the smoothness of the surface, and the presence and type of lubricant.

By using the principle of frictional force, the fixing part 50 includes a protrusion 51 which forms an uneven structure protruding outward on the outer surface of the implant, so that the coefficient of friction is higher than the coefficient of friction of the surface of the normal porous part. By increasing the friction between the vertebral bone and the implant to be treated. Accordingly, a predetermined fixation force may be applied to the implant inserted into the treatment target to prevent displacement or detachment of the implant due to movement of the treatment target or external impact after the surgery. As a result, the bone formation rate of the patient can be accelerated to promote the fusion with the original bone tissue of the treatment, to reduce the pain of the patient due to the surgery, and to prevent the complications and reoperations caused by the displacement or detachment of the implant. Can be.

The protrusion 51 includes not only the thread 511 shape shown in the embodiment of FIG. 5, but also various other shapes for increasing the friction force of the fixing part 50, and preferably, the shape for increasing the friction force. In addition, it forms a shape complementary to the shape of the vertebral bone around the surgical site of the treatment target, so that it can be closely fixed between the vertebral bones without being spaced after insertion to prevent damage to tissues due to heterogeneity and separation of the treatment target. It becomes possible.

6 to 9 are partial detailed views of the fixing part 50 shown in FIG. 6 is a protrusion 51 in which the inclined portion 511b has a straight shape, FIG. 7 is a protrusion in which the inclined portion 511b has a curved shape, FIG. 8 is a protrusion including a horizontal portion 511c, and FIG. 9. Shows a protruding portion in which the inclined portion 511b includes a horizontal portion 511c. The protrusion 51 includes a thread 511 and a fixing part supporting frame 513 of the porous structure.

Referring to Figure 6, the thread 511 is formed on the outer surface of the body portion 13 in contact with the vertebral bone, the thread to secure the fixing force of the implant (1) while reducing damage to the bone A configuration having the shape of 511 is described. The high portion between the bone and the valley of the screw is formed along the direction perpendicular to the inlet direction on the upper and lower surfaces of the body portion 13 to secure a frictional or fixed force that resists the external force in the inlet direction, thereby moving the patient, It is possible to prevent a problem that the implant 1 is out of position due to an impact from or the like.

Preferably, a plurality of shapes of the thread 511 are arranged at regular intervals to make the surface rougher, thereby increasing the coefficient of friction, and as shown in FIGS. 2 and 5, a straight line perpendicular to the insertion direction is implemented. The present invention is not limited to the example, and the peak shape of the screw thread 511 is arranged in the form of a concentric circle around the bone insertion hole 133 to obtain a fixed force from external forces in various directions, such as various arrangements that can increase other frictional forces. Includes all of them.

Even more preferably, when the fixing part 50 having the shape of the thread 511 is located only on one surface of the body part 13, the friction force is not evenly formed, and there is still a possibility of displacement or departure. The fixing part 50 having a shape is disposed symmetrically on the upper and lower sides of the body part 13 so that the implant 1 can be more stably fixed by symmetrically placing the upper and lower sides evenly.

Referring to FIG. 6, the thread 511 includes a vertical portion 511a perpendicular to the outer surface of the body portion 13 and an inclined portion 511b having a straight line shape inclined in the insertion direction of the implant. This facilitates insertion by reducing friction in the direction of implant insertion, and minimizes tissue damage that may occur during insertion. By having resistance to the implant can maximize the fixing force of the implant.

Referring to FIG. 7, the inclined portion 511b may have a curved shape as well as a straight line, thereby forming a larger angle at the corner end where the vertical portion 511a and the inclined portion 511b meet. The tissue damage of the subject can be reduced. Here, the end of the thread 511 refers to a peak portion having a thread 511 shape.

Even more preferably, as illustrated in FIGS. 8 and 9, the end portion of the screw thread 511 may further include a horizontal portion 511c formed in a direction parallel to the body portion 13, thereby introducing the implant. Damage to vertebral bones of a subject during treatment or during exercise of the subject can be reduced. Even more preferably, by treating the edge portion where the inclined portion 511b and the horizontal portion 511c meet with a curved surface, it is possible to minimize the bone damage of the treatment target by the edge portion formed while the surface meets the surface.

The fixing part supporting frame 513 refers to a frame that expresses the strength of the fixing part 50 by surrounding the outer circumferential surface of the porous structure forming the protrusion part 51.

When the protrusions 51 are formed only in a porous structure, they may promote bone growth speed of the treatment target, but may not have sufficient rigidity to withstand the load transmitted from the spine. This problem is solved by constructing the fixing part supporting frame part 513 capable of expressing strength in the protrusion 51.

The fixing part support frame 513 may be formed of a linear member or a plate-shaped member, the linear member is not only a straight member, but a concept including a curved member, collectively referred to as a member having a length longer than the width It is a concept. Therefore, when the fixing part supporting frame part 513 is configured through such a linear member, the completed fixing part supporting frame 513 does not form a surface, and an intervertebral fusion implant having an improved fixing part to be used in surgery ( As shown in FIG. 4, the front and rear, top, bottom, left and right sides can communicate with each other, and have a shape substantially the same as the shape of connecting the corners of 1) to form an empty space. Bone growth 10 may be filled. The plate-shaped member, unlike the linear member, means that the fixing part support frame 513 forms a surface. When the fixing part supporting frame 513 is configured in the form of a plate, the outer surface of the intervertebral fusion implant 1 having the improved fixing part can be configured to be smooth, and in this case, the bone growth part 10 having a somewhat rough surface. Is not exposed to the outside of the intervertebral fusion implant 1 with improved fixation, thereby reducing the frictional force when inserting the intervertebral fusion implant 1 with the improved fixation between the vertebral bones. The insertion of the intervertebral fusion implant 1 with the government can be facilitated.

Even more preferably, the fixing part support frame 513 is configured to be non-porous, through which radiation is not transmitted, so that the surgeon can facilitate the positioning of the implant 1. Furthermore, it may be composed of a living metal (titanium, titanium alloy, cobalt chromium, magnesium) and the like for expressing a predetermined strength.

Even more preferably, the fixing part supporting frame 513 constitutes a frame having a shape complementary to the contour of the bone growth part, so that the intensity of the implant 1 can be adjusted evenly as a whole, and when the radiation is irradiated By allowing the outer circumferential shape of (1) to be recognized, the position of the implant can be confirmed more easily.

10 is a partial elevational view showing that the porous portion constituting the thread 511 is projected out of the implant than the fixing portion support frame 513. When the surface of the fixing part 50 is configured as the fixing part supporting frame 513, the insertion of the implant is easy, but the fixing part supporting frame 513 is in direct contact with the bone of the treatment target and the porous part. Blocking or reducing the contact area has a problem that the coupling between the treatment and the porous portion is not tight. Furthermore, this leads to a problem that the binding force between the spinal bones of the implant implant portion of the treatment target is lowered. In order to solve this problem, the bone growth portion 10 of the porous portion is disposed outside of the fixing portion support frame 513 to be in direct contact with the adjacent vertebrae, so that the bone tissue of the treatment targets the void portion of the porous portion. This allows better penetration and allows the bone to grow evenly to the internal voids of the implanted implant, creating a tight union between the vertebral bone and the implant.

Figure 11 is a side view of a porous intervertebral fusion implant with an improved fixation that is another embodiment of the present invention. Referring to FIG. 8, although bone growth within the implant may be observed through the through hole 131, a bone graft may be released to the outside through the opening of the through hole 131. do. In order to solve this problem, the cover parts 70 may be formed at both openings of the through hole 131 to prevent the bone graft fragments from being separated. Preferably, the cover part 70 may be configured of a mesh part 71 through which radiation can pass, thereby observing internal bone growth through X-rays and preventing internal bone graft fragments from falling out. have.

12 is a rear perspective view of an intervertebral fusion implant with an improved fixation that is another embodiment of the present invention. As shown in FIG. 9, the coupling part 80 is coupled to an end of the second support frame 33 and has a surgical instrument used for manipulating the intervertebral fusion implant 1 having an improved fixing part. Refers to the connected configuration. The shape of the coupling portion 80 is not limited to this particular concept, but in relation to the surgical instrument to be used to insert the intervertebral fusion implant 1 having an improved fixation portion between the spinal bones of the patient. Various decisions can be made. The coupling part 50 may be configured to be exposed to the outside or may be configured not to be exposed to the outside, but preferably the coupling part 80 has an intervertebral fusion implant having an improved part between the vertebral bones. In combination with the surgical instrument (P) for the insertion of the (1) in that it is configured to receive an external force, it can be configured to be exposed to the outside of the bone growth portion 10.

13 is a state diagram used in the present invention. Referring to Figure 9, the intervertebral fusion implant (1) with the improved fixing part of the present inventors, as shown in Figure 10, the coupling portion 80 is connected to the surgical instrument (P) operation of the surgery Can be inserted in place between the planned vertebrae. In this process, the first support frame 31 having a relatively smooth surface is exposed to the outside, thereby narrowing the narrow space between the vertebrae and helping the implant 1 to be easily inserted. When the positioning of the implant 1 is completed, the implant 1 is stably fixed through the fixing part 50 formed on the upper and lower surfaces of the body part 13 of the bone growth part 10, and the fixing part 50 is fixed. Configures the vertical portion 511a and the inclined portion 511b to prevent the implant from being out of position after insertion. The end portion of the thread 511 constituting the fixing portion 50 is configured by the horizontal portion 511c, thereby minimizing damage to the vertebral bone of the patient. In addition, the fixing part support frame 513 of the linear member surrounds the outer circumferential surface of the screw thread 511 to maximize the contact of the porous part while reinforcing the rigidity of the fixing part. In addition, the through-hole 131 of the implant side for observing the bone graft fragment is wrapped in a cover portion 70 formed of a mesh 71 to prevent the bone graft fragments from being detached and to observe the bone growth at the same time.

The foregoing detailed description illustrates the present invention. In addition, the above-mentioned content shows and describes preferred embodiment of this invention, and this invention can be used in various other combinations, changes, and environments. That is, changes or modifications can be made within the scope of the concept of the invention disclosed in this specification, the scope equivalent to the disclosures described above, and / or the skill or knowledge in the art. The described embodiments illustrate the best state for implementing the technical idea of the present invention, and various modifications required in the specific application field and use of the present invention are possible. Thus, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. Also, the appended claims should be construed as including other embodiments.

1: Porous intervertebral fusion implant with improved fixation
10: bone growth portion 11: head portion
13: body portion 30: frame portion
31: first support frame 33: second support frame
50: fixing part 51: protrusion
70: cover portion 71: mesh portion
80: coupling part
90: porous cage of the spine
B: vertebral bone to be treated

Claims (18)

A porous bone growth portion that replaces the space between neighboring vertebral bones, and includes a frame portion formed to support the bone growth portion and expressing the strength of the vertebral fusion implant, wherein the frame portion is formed between the bone growth portion and the vertebrae. A porous intervertebral fusion implant with an improved fixation comprising a fixation to fix the position of the implant inserted in the space. The porous intervertebral fusion implant of claim 1, wherein the fixation comprises a protrusion projecting out of the implant. 3. The porous intervertebral fusion implant of claim 2, wherein the protrusion comprises a fixing support frame for supporting a protruding porous structure. 4. The porous intervertebral fusion implant according to claim 3, wherein the protrusion is provided with a plurality of protrusions arranged at regular intervals. 5. The porous intervertebral fusion implant according to claim 4, wherein the screw thread includes a vertical portion perpendicular to the surface direction of the bone growth portion and a fixing portion having an inclined portion having a predetermined slope in the pulling direction. 6. The porous intervertebral fusion implant according to claim 5, wherein the inclined portion has a straight shape. 7. The porous intervertebral fusion implant according to claim 6, wherein the inclined portion has a curved shape. 6. The porous intervertebral fusion implant according to claim 5, wherein the thread comprises a flat horizontal portion at the end of the protruding thread in the direction of the bone growth surface. 9. The porous intervertebral fusion implant according to claim 8, wherein the thread has an improved fixation portion wherein the edges of the inclined portion and the horizontal portion are curved. 10. The porous intervertebral fusion implant according to claim 9, wherein the fixation portion is located on the upper and lower sides of the bone growth portion. 11. The porous intervertebral fusion implant according to claim 1, wherein the fixation portion has an improved fixation portion in which the porous structure protrudes from the support frame in order to maximize the growth rate of the bone to be treated. 4. The porous intervertebral fusion implant according to claim 3, wherein the support frame portion is comprised of a linear member. 13. The porous intervertebral fusion implant according to claim 12, wherein the support frame portion is made of non-porous material that is impermeable to radiation, thereby facilitating positioning of the implant. 14. The porous intervertebral fusion implant with an improved fixation according to claim 13, wherein the support frame portion has a shape complementary to the contour of the bone growth portion. The bone insertion portion of claim 1, wherein the bone growth portion is formed on one surface of the vertebral fusion implant so as to insert the bone graft into the vertebral fusion implant and communicates with a bone insertion space into which the bone graft is inserted. A porous intervertebral fusion implant with an improved fixation comprising a hole. The porous intervertebral fusion implant according to claim 1, wherein the bone growth portion includes a through hole formed to penetrate the other surface from one surface to observe the growth of the bone. 17. The porous intervertebral fusion implant of claim 16, wherein the bone growth portion comprises a lid covering the through hole to prevent release of bone graft debris within the through hole. 18. The porous intervertebral fusion implant of claim 17, wherein the lid comprises a mesh portion that prevents detachment of the bone graft within the bone insertion space and forms voids for observing bone growth.