Straddle nail and straddle nail spreader

Abstract

The invention discloses a straddle nail. The straddle nail comprises a first nail body and a second nail body, the first nail body comprises a nail head I and a nail rod I integrally formed with the nail head I; the second nail body comprises a nail head II and a nail rod II integrally formed with the nail head II, and a groove is formed in the periphery of the second nail body and used for containing the first nail body; according to the technical scheme, through the organic combination of the two nail bodies, the straddle nail is more stable in the bone marrow tract and not prone to falling off. The invention further discloses a straddle nail spreader.

Description

[0001] The application claims priority to the Chinese Patent Application No. 202511001761.3, filed on July 21, 2025, and entitled "A riding staple and a riding staple distraction device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of orthopedic medical devices, more particularly to a riding staple and a riding staple distraction device. BACKGROUND

[0003] A riding staple is a commonly used orthopedic surgical internal fixation device, mainly used to provide stable fracture fixation or promote bone healing. The existing riding staple is usually composed of two parallel or slightly angled tips and a middle beam, similar to a door frame structure, and is made of biocompatible materials such as titanium alloy or stainless steel. The tip penetrates into the bone tissue, the beam spans the fracture line or the bone cutting site, providing compression or stable fixation to promote bone healing. As a targeted internal fixation tool, the riding staple is recognized by medical personnel and patients due to its simple structure and convenient operation.

[0004] The inventor found that the current single door type riding staple is not stable enough in the bone marrow channel during long-term work, and is easy to fall off. Titanium alloy or stainless steel can produce artifacts in the human body, affecting normal examination of the human body. In addition, the metal door type riding staple can release harmful metal ions, causing bone resorption or forming allergens to damage the health of the human body.

[0005] There is an urgent need to design a more stable, less likely to fall off, and easy to integrate with human bone quality riding staple to further meet the clinical needs. SUMMARY

[0006] 1. Technical problem to be solved by the application

[0007] Therefore, the purpose of the present application is to provide a riding staple and a riding staple distraction device, which solves the problem of the traditional single riding staple being not stable enough, easy to fall off, or difficult to integrate with human bone quality by using two staple bodies made of high molecular material polyether ether ketone combined with carbon fiber to form a riding staple.

[0008] 2. Technical solution

[0009] To achieve the above-mentioned purpose, the present application provides the following technical solution:

[0010] The riding staple of the present application comprises a first staple body and a second staple body, both of which are made of high molecular material;

[0011] The first nail body comprises a nail head I and a nail rod I integrally formed with the nail head I;

[0012] The second nail body comprises a nail head II and a nail rod II integrally formed with the nail head II, and the outer periphery of the second nail body is provided with a groove for accommodating the first nail body.

[0013] Further, the groove on the outer side of the nail head II is provided with an outer ratchet II, and the inner side of the nail head I is provided with an inner ratchet I, the outer ratchet II matches the inner ratchet I, and the tapered implantation of the nail head I and the nail head II in the bone marrow channel forms an expansion effect, which can effectively fix in the bone marrow channel in cooperation with the ratchet structure of the nail head.

[0014] Further, the outer side of the nail head I is provided with an outer ratchet I, and the inner side of the nail head II is provided with an inner ratchet II.

[0015] Further, the outer ratchet I on the outer side of the nail head I and the inner ratchet I on the inner side of the nail head I are close to the end of the nail head I, and the outer ratchet II on the outer side of the nail head II and the inner ratchet on the inner side of the nail head II are close to the end of the nail head II.

[0016] Further, the nail head I is provided with a predetermined angle R1, and the nail head II is provided with a predetermined angle R2 matching the predetermined angle R1 of the nail head I, and the unique inner and outer R angle design enhances the clamping force of the nail head, so that the fracture site can be better fused.

[0017] Further, the nail rod I has a predetermined arc, and the nail rod II has an arc matching the predetermined arc of the nail rod I.

[0018] Further, the end of the nail head I is tapered, and the end of the nail head II is also tapered.

[0019] Further, the nail body and the nail body are made of polyether ether ketone plus carbon fiber material.

[0020] The second aspect of the present application also relates to a riding staple expander for expanding the riding staple, the riding staple expander comprising a knob, an expander body and a guide column, and the guide column can be expanded to the two sides through the expander by rotating the knob, so as to expand the riding staple.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0023] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0024] The application discloses a riding nail, which comprises a first nail body and a second nail body; the first nail body comprises a nail head I and a nail rod I which is integrally formed with the nail head I; the second nail body comprises a nail head II and a nail rod II which is integrally formed with the nail head II, and the second nail body is provided with a groove in the outer periphery for accommodating the first nail body; the organic combination of the two nail bodies makes the riding nail more stable in the bone marrow channel and less likely to fall off.

[0025] In addition to the objects, features and effects described above, the application has other objects, features and effects. The application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of a riding nail according to an embodiment of the application;

[0027] Figure 2 is a schematic view of a first nail body according to an embodiment of the application;

[0028] Figure 3 is a schematic view of a second nail body according to an embodiment of the application;

[0029] Figure 4 is a schematic view of a riding nail in an expanded state according to an embodiment of the application;

[0030] Figure 5 is a schematic view of a riding nail in a closed state according to an embodiment of the application;

[0031] Figure 6 is a schematic view of an expander structure according to an embodiment of the application;

[0032] Figure 7 is a schematic view of an expander working state according to an embodiment of the application;

[0033] Figure 8 is a schematic view of a riding nail after being knocked into a bone marrow channel according to an embodiment of the application.

[0034] Explanation of reference numerals in the schematic view: 1, first nail body; 11, nail head I; 111, inner reverse tooth I; 112, outer reverse tooth I; 12, nail rod I;

[0035] 2, second nail body; 21, nail head II; 211, inner reverse tooth II; 212, outer reverse tooth II; 22, nail rod II; 23, groove;

[0036] 3, expander; 31, knob; 32, expander body; 33, guide column. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions, the technical solutions of the application will be described clearly and completely below with reference to the drawings and embodiments.

[0038] The structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, and are not used to limit the defined conditions that the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportion relationship, or adjustment of the size, without affecting the effects that the present application can produce and the purposes that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application. The terms such as "first, second", "inner, outer", "upper, lower" in the specification are only for the convenience of clear description, and are not used to limit the scope of implementation. The change or adjustment of the relative relationship is also considered as the scope of implementation of the present application without substantially changing the technical content.

[0039] At present, the traditional single body sewing nail is not stable enough in the bone marrow channel during a long time work process, and is easy to fall off. Titanium alloy or stainless steel material can produce artifacts in the human body, affecting normal examination of the human body. In addition, the metal door type sewing nail is easy to release harmful metal ions, causing bone resorption or forming allergens to damage the health of the human body.

[0040] In view of the fact that the single body sewing nail made of high polymer material is not stable enough in strength, and the single body sewing nail made of titanium alloy or stainless steel material has the negative effect of being easy to release metal ions, the basic idea of the present application is to provide a sewing nail made of high polymer material polyether ether ketone combined with carbon fiber material, which is easy to be integrated with human bone. The organic combination of two nail bodies further improves the stability of the sewing nail in the bone marrow channel, and is not easy to fall off. It also avoids the negative effects of using titanium alloy or stainless steel material, which may produce metal ions in the human body, and has a wide application prospect.

[0041] Reference Figures 1 to 8 As shown in the drawings, the sewing nail of the embodiment of the present application comprises a first nail body 1 and a second nail body 2, and the first nail body 1 and the second nail body 2 are both made of high polymer material, so that the nail body is more easily integrated with human bone.

[0042] The first nail body 1 comprises a nail head I 11 and a nail rod I 12 integrally formed with the nail head I, and the integrally formed two have better mechanical properties, and the production efficiency will be higher, unnecessary assembly procedures are saved, and it is also more convenient to use.

[0043] The second nail body 2 comprises a nail head II 21 and a nail rod II 22 integrally formed with the nail head II, and the outer periphery of the second nail body 2 is provided with a groove 23 for accommodating the first nail body 1. When in use, the first nail body 1 is combined tightly together with the second nail body 2 through the groove 23 of the second nail body 2.

[0044] The outer undercut 1122 of the nail head I 111 and the inner undercut 1121 of the nail head II 211 are close to the end of the nail head I 111, and the outer undercut 1122 of the nail head II 211 and the inner undercut 1121 of the nail head II 211 are close to the end of the nail head II 211, so that the stress is more balanced, and the manufacturing is relatively easy.

[0045] The outer undercut 1122 of the nail head I 111 and the inner undercut 1121 of the nail head II 211 are close to the end of the nail head I 111, and the outer undercut 1122 of the nail head II 211 and the inner undercut 1121 of the nail head II 211 are close to the end of the nail head II 211, so that the stress is more balanced, and the manufacturing is relatively easy.

[0046] Preferably, the outer undercut 1122 is larger than the inner undercut 1121, the outer undercut 1122 is engaged with the bone marrow channel, and the inner undercut 1121 is engaged with the outer undercut 1122 of the nail head II 211.

[0047] The outer undercut 1122 of the nail head I 111 and the inner undercut 1121 of the nail head II 211 are close to the end of the nail head I 111, and the outer undercut 1122 of the nail head II 211 and the inner undercut 1121 of the nail head II 211 are close to the end of the nail head II 211, so that the stress is more balanced, and the manufacturing is relatively easy.

[0048] In some embodiments, the nail head I 111 has a predetermined angle R1, the nail head II 211 has a predetermined angle R2 matched with the predetermined angle R1 of the nail head I 111, the nail rod and the nail head are provided with a transition angle, which can increase the internal buckling force of the nail body and make the fracture site better fused.

[0049] The nail rod I 112 has a predetermined arc, and the nail rod II 222 has an arc matched with the predetermined arc of the nail rod I 112. The nail rod is not in a straight line type, but has a slightly internal buckling arc, which can also appropriately increase the internal buckling force of the nail body.

[0050] The end of the nail head I 111 is conical, and the end of the nail head II 211 is also conical, which is more conducive to being inserted into the bone marrow channel and also produces an expansion effect after being inserted into the bone marrow channel. When used, the undercut inside the groove and the tapered nail head produce extrusion and expansion force when the two nail bodies are implanted, so that the nail body is more stable in the bone marrow channel, and the undercut engagement with the bone marrow better prevents the nail body from loosening.

[0051] The nail body 1 and the nail body 2 are made of polyether ether ketone plus carbon fiber material, which makes the nail body easy to be fused with human bone, and effectively overcomes the negative effects that may be caused by alloy type nail body.

[0052] The second aspect of the present application also relates to a staple expander for expanding the above-mentioned staple, the staple expander 3 comprising a knob 31, an expander body 32 and a guide column 33, turning the knob 31 can expand the guide column 33 to both sides through the expander 32, and then expand the staple. Expanding the staple to the appropriate position, aligning the front end of the staple with the pre-prepared bone marrow hole, knocking the back end of the expander into the staple, the curved arc of the nail rod has better internal buckling force, and the expansion structure of the nail head makes the nail head better stable in the bone marrow hole.

[0053] The above description of the present application and its embodiments is illustrative and not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. If a person skilled in the art is inspired thereby, without departing from the spirit of the present application, similar structural modes can be designed without creativity, which belong to the protection scope of the present application.

Claims

1. A type of saddle-and-groove staple, characterized in that, It includes a first nail body (1) and a second nail body (2), both of which are made of polymer materials; The first nail body (1) includes a nail head I (11) and a nail shank I (12) integrally formed with the nail head I; The second nail body (2) includes a nail head II (21) and a nail shank II (22) integrally formed with the nail head II. The outer periphery of the second nail body (2) is provided with a groove (23) for accommodating the first nail body (1).

2. The saddle-stud according to claim 1, characterized in that, The groove (23) on the outside of the nail head II (21) has an outer back tooth II (212), and the inner side of the nail head I (11) is provided with an inner back tooth I (111). The outer back tooth II (212) matches the inner back tooth I (111).

3. The seam anchor according to claim 2, characterized in that, The nail head I (11) has an outer back tooth I (112) on its outer side, and the nail head II (21) has an inner back tooth II (211) on its inner side.

4. The seam anchor according to claim 3, characterized in that, The outer inverted tooth I (112) is larger than the inner inverted tooth I (111). The outer inverted tooth I (112) engages with the bone marrow tract. The inner inverted tooth I (111) engages with the outer inverted tooth II (212) on the outside of the nail head II (21).

5. The saddle-stud according to claim 4, characterized in that, The outer countersunk tooth I (112) on the outer side and the inner countersunk tooth I (111) on the inner side of the nail head I (11) are both close to the end of the nail head I (11), and the outer countersunk tooth II (212) on the outer side and the inner countersunk tooth (211) on the inner side of the nail head II (21) are both close to the end of the nail head II (21).

6. The saddle-stud according to claim 5, characterized in that, The nail head I (11) has an inward angle of R1, and the nail head II (21) has an inward angle of R2 that matches the inward angle of R1 of the nail head I (11).

7. The saddle-stud according to claim 5, characterized in that, The nail rod I (12) has a predetermined arc, and the nail rod II (22) has an arc that matches the predetermined arc of the nail rod I (12).

8. The saddle nail according to any one of claims 1 to 7, characterized in that the end of the nail head I (11) is tapered and the end of the nail head II (21) is also tapered.

9. The saddle stitching according to any one of claims 1 to 7, characterized in that, Both the nail body (1) and the nail body (2) are made of polyetheretherketone and carbon fiber material.

10. A staple retractor for retracting staples as described in any one of claims 1 to 9, characterized in that, The saddle stitching spreader (3) includes a knob (31), a spreader body (32), and a guide post (33). Rotating the knob (31) will expand the guide post (33) to both sides through the spreader (32), thereby spreading the saddle stitching open.

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