Bone nail structure and application thereof

Abstract

The invention discloses a bone nail structure and application thereof, the bone nail structure comprises a nail body, a positioning piece and a holding piece, the positioning piece is provided with a first side and a second side which are opposite to each other, the end part of the nail body is arranged on the first side, and the holding piece is arranged on the second side; wherein the end parts of the left side and the right side of each holding piece are symmetrically arc-shaped, so that two adjacent holding pieces of the bone nail structure can be mutually stacked when a spine fixation operation is carried out, the opening area occupied by the plurality of holding pieces on the skin surface is further reduced, the opening width is greatly reduced, the wound range is minimized, and the spine fixation operation is facilitated. Therefore, the soft tissue injury of the operation part is minimized.

Description

Technical Field

[0001] The present invention discloses a bone screw structure and its application, and more particularly, relates to a bone screw structure applied to the spine and its application. Background Art

[0002] As people age, their bodies are prone to various symptoms due to aging, especially symptoms of spinal compression caused by standing or sitting for long periods of time at work. When spinal compression occurs, medical personnel usually perform minimally invasive lumbar spine surgery, which fixes multiple bone screws between the vertebrae in a specific section to prevent the vertebrae in that section from shifting, so that the patient can no longer drive the vertebrae in that section (for example, bend over), and thus the vertebrae in that section no longer compress the nerves.

[0003] During minimally invasive lumbar spine surgery, the grippers connected to the ends of adjacent bone screws interfere with each other, so the minimally invasive incision must be of a certain size. It is therefore difficult to reduce the area of ​​the minimally invasive incision, which may lead to inflammation or infection of the minimally invasive incision, and the healing of the minimally invasive incision also takes a long time.

[0004] To solve the above problems, existing technologies have been developed to reduce the width of the micro-injury by improving the bone screw holders so that adjacent holders are brought closer to each other through their inclined surfaces to reduce the angles between the holders, thereby achieving the effect of reducing the width of the micro-injury.

[0005] However, the opening width of the minimally invasive incision is still not small enough, so the design of the handle needs to be further improved to significantly reduce the opening width of the minimally invasive incision and minimize the scope of the minimally invasive incision, so as to minimize the soft tissue damage at the surgical site. Summary of the invention

[0006] In view of the above-mentioned defects of the prior art, the inventors of the present application have made improvements and innovations and developed a new type of bone screw structure to further reduce the opening width of the minimally invasive incision, so as to minimize the soft tissue damage at the surgical site.

[0007] The first object of the present invention is to provide a bone nail structure, which includes: a nail body; a positioning member having a first side and a second side opposite to each other, the first side being arranged at the end of the nail body; and a holding member arranged on the second side of the positioning member, the left and right ends of the holding member present a symmetrical arc shape.

[0008] Preferably, the nail body is in the shape of a screw.

[0009] Preferably, the positioning member and the nail body can rotate relative to each other.

[0010] Preferably, the arc shape may be a scimitar shape or a sickle shape, but is not limited thereto, and any arc shape that can be stacked on each other may be used.

[0011] Preferably, the positioning member and the holding member may be an integrated structure.

[0012] Preferably, the positioning member and the holding member are combined with the holding member by a plurality of assembling members.

[0013] After the spinal fixation surgery is performed and the bone screw structure is placed in the spine for fixation, if the positioning member and the holding member are an integrated structure, the holding member is broken or cut off from the positioning member and removed; if the positioning member and the holding member are combined by multiple assembly members, the multiple assembly members are removed to remove the holding member from the positioning member. Preferably, the holding member can be in a fixed length form or an adjustable length form. The spinal positions of different patients undergoing minimally invasive lumbar spine surgery are different. Depending on the situation, the fixed length form or the adjustable length form of the holding member can be selected to ensure smooth operation.

[0014] Preferably, the positioning member and the nail body can rotate 360 ​​degrees relative to each other.

[0015] Preferably, the positioning member has an accommodating space.

[0016] Preferably, the front and rear sides of the holding member are both provided with openings connected to the accommodating space, and the openings pass through the front and rear sides of the holding member; wherein the front side of the holding member is located on the inner side of the arc, and the rear side of the holding member is located on the outer side of the arc.

[0017] Preferably, a thread is provided at the top inner side of the accommodating space of the positioning member, and another thread is also provided at the bottom inner side of the opening of the holding member, that is, the thread and the other thread are respectively provided at the place where the second side of the positioning member is connected to the holding member, and the nail body can be rotated along the two threads through the two threads to be set on the first side of the positioning member.

[0018] The second purpose of the present invention is to reduce the opening width of the minimally invasive wound by utilizing the structural design of the bone screw structure, so as to minimize the soft tissue damage at the surgical site. The principle is to stack the rear side of the holding piece of the bone screw structure with the front side of another holding piece on another bone screw structure, and through the mutual stacking of the holding piece and the other holding piece, the cross-sectional area of ​​multiple holding pieces is reduced during stacking, so as to reduce the area occupied by the two on the plane, so that the angle between the multiple holding pieces can be further reduced compared with the prior art, thereby reducing the opening width of the minimally invasive wound, and two or more bone screw structures can be stacked at the same opening width. The main reason why two or more bone screw structures can be stacked is that the spine has a certain physiological curvature rather than a straight line. After the first bone screw structure is placed and adjusted, the second or more bone screw structures can be stacked and placed at the same opening width.

[0019] Preferably, the opening size of the minimally invasive incision only needs to be the width of the narrowest arc of the holding member, so that at least one of the bone screw structures can be stacked and placed in the spine.

[0020] In summary, by designing the end of the bone screw structure's holding piece to be an arc that can be stacked on each other, the holding pieces of two adjacent bone screw structures can be stacked on each other during spinal fixation surgery, thereby reducing the opening area occupied by multiple holding pieces on the skin surface, so that the opening size of the minimally invasive wound only needs to be the width of the narrowest part of the arc of the holding piece, and at least one of the bone screw structures can be placed in the spine, thereby greatly reducing its opening width and minimizing the wound range, thereby minimizing soft tissue damage at the surgical site.

[0021] The following is a detailed description of specific embodiments in conjunction with the attached drawings, so that the purpose, technical content, characteristics and effects of the present invention can be more easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a stereoscopic diagram of the bone screw structure of the present invention;

[0023] Figure 2 It is a left side view of the bone screw structure of the present invention;

[0024] Figure 3 It is a front view of the bone screw structure of the present invention;

[0025] Figure 4 A schematic diagram of a holding piece of a bone screw structure of the present invention, which is a fixed length form and an adjustable length form;

[0026] Figure 5 A schematic diagram of a holding piece of a bone screw structure of the present invention and a holding piece of another bone screw structure being stacked on each other;

[0027] Figure 6 It is a schematic diagram of the angle between the holding pieces of the bone screw structure of the present invention after they are stacked together after being placed in the spine.

[0028] Description of reference numerals:

[0029] 1,1': bone screw structure;

[0030] 2,2': nail body;

[0031] 3,3': positioning piece;

[0032] 4,4': holding piece;

[0033] 5: first side;

[0034] 6: second side;

[0035] 7: Accommodation space;

[0036] 8: Open your mouth;

[0037] A: Angle;

[0038] B: posterior;

[0039] F, F': front side;

[0040] L: left side;

[0041] R: right side;

[0042] P1, P2: thread;

[0043] S: Skin. DETAILED DESCRIPTION

[0044] In order to clearly express the features, contents, advantages and effects of the present invention, the present invention is described in detail with the aid of the accompanying drawings. The accompanying drawings used in the text are only for illustration and auxiliary description purposes, and may not be the actual proportions and accurate configurations of the present invention after implementation. Therefore, the proportions and configurations of the attached drawings should not be used to limit the scope of the present invention in actual implementation.

[0045] In order to make the technical content, purpose of the invention and the effects achieved by the present invention more complete and clear, they are described in detail below, and please refer to the disclosed drawings and figure numbers.

[0046] The first object of the present invention is to provide a bone screw structure. Figure 1 , Figure 2 as well as Figure 3 , which are respectively a stereoscopic view, a left view and a front view of the bone screw structure of the present invention.

[0047] Depend on Figure 1 , Figure 2 as well as Figure 3 It can be seen that the bone nail structure 1 includes a nail body 2, a positioning member 3 and a holding member 4. The positioning member 3 has a first side 5 and a second side 6 opposite to each other, the end of the nail body 3 is disposed on the first side 5 of the positioning member 3, and the holding member 4 is disposed on the second side 6 of the positioning member 3. In addition, the ends of the left side L and the right side R of the holding member 3 are symmetrically arc-shaped.

[0048] Preferably, the arc shape may be a scimitar shape or a sickle shape, but is not limited thereto, and any arc shape that can be stacked on each other may be used.

[0049] The nail body 2 is in the shape of a screw, and the positioning member 3 and the nail body 2 can rotate relative to each other.

[0050] Preferably, the positioning member 3 and the nail body 2 can rotate 360 ​​degrees relative to each other.

[0051] The positioning member 3 has an accommodating space 7, and the front side F and the rear side B of the holding member 4 are both provided with openings 8 connected to the accommodating space 7, and the openings 8 pass through the front side F and the rear side B of the holding member 4. The front side F of the holding member 4 is located on the inner side of the arc, and the rear side B of the holding member 4 is located on the outer side of the arc.

[0052] A thread P1 is provided at the top inner side of the accommodating space 7 of the positioning member 3, and another thread P2 is also provided at the bottom inner side of the opening 8 of the holding member 4, that is, the thread P1 and the other thread P2 are respectively provided at the connection point between the second side 6 of the positioning member 3 and the holding member 4, and the nail body 2 can be rotated along the two threads through the two threads to be set on the first side 5 of the positioning member 3.

[0053] Preferably, the positioning member 3 and the holding member 4 may be an integral structure or may be combined with the holding member 4 by a plurality of assemblies (not shown in the figure). After the spinal fixation surgery is performed and the bone screw structure 1 is placed in the spine for fixation, if the positioning member 3 and the holding member 4 are an integral structure, the holding member 4 is broken or cut off from the positioning member 3 and removed; if the positioning member 3 and the holding member 4 are combined by a plurality of the assemblies, the plurality of the assemblies are removed to remove the holding member 4 from the positioning member 3.

[0054] Please also read Figure 4 , Figure 4The holding piece of the bone screw structure of the present invention is a schematic diagram of a fixed length form and an adjustable length form. Preferably, the holding piece 4 can be a fixed length form or an adjustable length form. The spine positions of different patients undergoing minimally invasive lumbar spine surgery are different. Depending on the situation, the holding piece 4 in a fixed length form or an adjustable length form can be selected to ensure smooth operation.

[0055] The second purpose of the present invention is to reduce the width of the opening of the minimally invasive incision by utilizing the structural design of the bone screw structure, so as to minimize the soft tissue damage at the surgical site. Figure 5 , Figure 5 FIG. 1 is a schematic diagram of a holding member of a bone screw structure of the present invention and a holding member of another bone screw structure stacked on each other. Figure 5 It can be seen that the principle of reducing the opening width of the minimally invasive wound to minimize the soft tissue damage at the surgical site is that the rear side B of the holding piece 4 of the bone screw structure 1 can be stacked with the front side F' of another holding piece 4' on another bone screw structure 1', thereby reducing the cross-sectional area of ​​multiple holding pieces when stacking, thereby reducing the area occupied by both of them on the plane, so that the angle A between the two holding pieces can be further reduced, thereby reducing the opening width of the minimally invasive wound, and two or more bone screw structures can be stacked at the same opening width to minimize the soft tissue damage at the surgical site.

[0056] Finally, please refer to Figure 6 , Figure 6 It is a schematic diagram of the angle between the holding pieces of the bone screw structure of the present invention after they are stacked together after being placed in the spine.

[0057] Depend on Figure 6 It can be known that the holding piece 4 of the bone screw structure 1 of the present invention and the arc-shaped portion at the end of the other holding piece 4' of another bone screw structure 1' are stacked on each other, and have a smaller angle A than the holding pieces of the bone screw structure in the prior art after being stacked on each other, so that the size of the minimally invasive incision only needs to be the width of the narrowest part of the arc of the holding piece 4 to be inserted into the spine. In other words, during surgery, only a minimally invasive incision the size of the narrowest part of the arc of the holding piece 4 needs to be opened to insert at least one bone screw structure 1. The main reason is that the spine has a certain physiological curvature rather than a straight line. After the first bone screw structure is inserted and the position is adjusted, the second or more bone screw structures can be stacked and inserted with the same opening width. Preferably, a minimally invasive incision the size of the narrowest part of the arc of one holding piece 4 can accommodate 2 to 3 bone screw structures 1. In addition, by Figure 6 It can be seen that the upper end of the narrowest arc portion of the end of the holding piece 4 and the upper end of the narrowest arc portion of the end of the other holding piece 4 ′ are both exposed on the surface of the skin S.

[0058] In summary, the bone screw structure of the present invention improves the design of the end of the holding piece so that the left and right sides of the end of the holding piece present a symmetrical arc shape, which can further reduce the angle after the holding pieces are overlapped. When performing spinal fixation surgery, the holding pieces of two adjacent bone screw structures are stacked on each other, thereby reducing the opening area occupied by multiple holding pieces on the skin surface, greatly reducing the opening width, minimizing the wound range, and minimizing the soft tissue damage at the surgical site.

[0059] Through the description of the above-mentioned embodiments, the operation, use and effects of the present invention can be fully understood. The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereto. That is, simple equivalent changes and modifications made according to the claims and description of the present invention are all within the scope of the present invention.

Claims

1. A bone screw structure, characterized in that: include: Nail body; a positioning member having a first side and a second side opposite to each other, wherein the first side is disposed at an end of the nail body; as well as The holding member is arranged on the second side of the positioning member, and the left and right ends of the holding member are symmetrically arc-shaped.

2. The bone screw structure according to claim 1, characterized in that: The nail body is in the shape of a screw.

3. The bone screw structure according to claim 1, characterized in that: The positioning member and the nail body can rotate relative to each other.

4. The bone screw structure according to claim 1, characterized in that: The arc is in the shape of a scimitar or a sickle.

5. The bone screw structure according to claim 1, characterized in that: The positioning member and the holding member are an integrated structure.

6. The bone screw structure according to claim 1, characterized in that: The positioning member and the holding member are combined by a plurality of assembly members.

7. The bone screw structure according to claim 1, characterized in that: The handle is of a fixed length or adjustable length.

8. The bone screw structure according to claim 1, characterized in that: The positioning member has an accommodating space.

9. The bone screw structure according to claim 8, characterized in that: The front and rear sides of the holding member are both provided with openings connected to the accommodating space, and the openings pass through the front and rear sides of the holding member, the front side of the holding member is located on the inner side of the arc, and the rear side of the holding member is located on the outer side of the arc.

10. The bone screw structure according to claim 9, characterized in that: The rear side of the holding member and the front side of another holding member on another bone screw structure are stacked on each other.

11. Use of the bone screw structure according to any one of claims 1 to 10, characterized in that: The bone nail structure is used to reduce the opening width of the minimally invasive incision, so as to minimize the soft tissue damage at the surgical site.

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