阅读说明：本技术 一种自降解膨胀镁合金骨钉 (Self-degradation expansion magnesium alloy bone nail ) 是由 李卫荣 李艳芳 李荣慧 叶翠芳 段瑜 于 2021-08-13 设计创作，主要内容包括：本发明涉及生物医疗器械领域,尤其涉及一种自降解膨胀镁合金骨钉。所述自降解膨胀镁合金骨钉包括镁合金螺纹骨钉和金属钉帽,所述镁合金螺纹骨钉内设有轴向设置的中空腔,且所述镁合金螺纹骨钉靠近钉尾处的钉壁上开设有若干个环形分布的腰型腔,所述金属钉帽上安装有用于连接镁合金螺纹骨钉的限位连接件。本发明提供的自降解膨胀镁合金骨钉将镁合金螺纹骨钉旋进至患者骨孔内,旋进完毕后,上滑金属钉帽使得插设杆从插设孔内滑脱,从而将金属钉帽与镁合金螺纹骨钉分离,以便患者在后续康复痊愈时镁合金螺纹骨钉可以有效降解,并使得连接处的表面无钉帽残留。(The invention relates to the field of biomedical equipment, in particular to a self-degradation expansion magnesium alloy bone nail. The self-degradation expansion magnesium alloy bone nail comprises a magnesium alloy threaded bone nail and a metal nail cap, wherein a hollow cavity is axially arranged in the magnesium alloy threaded bone nail, a plurality of waist cavities which are distributed annularly are formed in the nail wall, close to the nail tail, of the magnesium alloy threaded bone nail, and a limiting connecting piece used for connecting the magnesium alloy threaded bone nail is installed on the metal nail cap. The self-degradation expansion magnesium alloy bone nail provided by the invention is characterized in that the magnesium alloy threaded bone nail is screwed into a bone hole of a patient, after the screwing-in is finished, the metal nail cap is slid upwards to enable the inserting rod to slip from the inserting hole, so that the metal nail cap is separated from the magnesium alloy threaded bone nail, the magnesium alloy threaded bone nail can be effectively degraded when the patient is recovered in the subsequent process, and no nail cap residue exists on the surface of the connecting part.)

1. A self-degradation expansion magnesium alloy bone nail is characterized by comprising:

the magnesium alloy threaded bone nail (1) is internally provided with a hollow cavity (3) which is axially arranged, and the nail wall of the magnesium alloy threaded bone nail (1) close to the nail tail is provided with a plurality of annularly distributed waist cavities (5);

the metal screw cap (2), install spacing connecting piece (7) that are used for connecting magnesium alloy screw thread bone nail (1) on metal screw cap (2).

2. The self-degradation expansion magnesium alloy bone nail according to claim 1, wherein the end head of the tail of the magnesium alloy threaded bone nail (1) is provided with a plurality of insertion holes (6) which are distributed annularly.

3. The self-degradation expansion magnesium alloy bone nail according to claim 1, characterized in that a plurality of overflow holes (4) distributed annularly are formed in the nail body of the magnesium alloy threaded bone nail (1), and the overflow holes (4) are communicated with the hollow cavity (3).

4. The self-degradation expansion magnesium alloy bone nail according to claim 1, characterized in that the hollow cavity (3) arranged in the magnesium alloy threaded bone nail (1) is two-section stepped, and the diameter of the hollow cavity (3) corresponding to the waist-shaped cavity (5) is larger than the diameter of the hollow cavity (3) of the magnesium alloy threaded bone nail (1) close to the nail head.

5. The self-degradation expansion magnesium alloy bone nail according to claim 1, wherein the limiting connecting piece (7) comprises a connecting nail tube (71) and an inserting rod (72), the connecting nail tube (71) is fixedly embedded on the inner wall of the metal nail cap (2) and is communicated with the hollow cavity (3) formed in the metal nail cap (2), and a plurality of inserting rods (72) distributed in an annular shape are fixedly installed at the head of the connecting nail tube (71).

6. The self-degradation expansion magnesium alloy bone nail according to claim 2 or 5, wherein the insertion rods (72) in the limiting connecting piece (7) are respectively inserted into the insertion holes (6) formed in the magnesium alloy threaded bone nail (1).

7. The self-degradation expansion magnesium alloy bone nail according to claim 1, characterized in that the top of the metal nail cap (2) is provided with a cross groove (8).

Technical Field

The invention relates to the field of biomedical equipment, in particular to a self-degradation expansion magnesium alloy bone nail.

Background

The magnesium alloy is an in-vivo absorbable implant material, and has better mechanical property and biocompatibility compared with the existing absorbable material. Compared with the bioactive titanium alloy, the magnesium alloy has beneficial biological absorbability, so the magnesium alloy as a degradable metal material is made into a magnesium alloy implant device, and particularly has great advantages in an intraosseous fixation implant device for bone tissue repair, and the magnesium alloy as a biomedical degradable absorption material has good medical safety foundation.

However, the bone nail in the prior art is fixed only through the external thread, and the bone nail is easy to loosen in the using process, which brings great pain to patients.

Therefore, a new self-degradation expansion magnesium alloy bone nail is needed to solve the technical problems.

Disclosure of Invention

In order to solve the technical problem, the invention provides a self-degradation expansion magnesium alloy bone nail.

The invention provides a self-degradation expansion magnesium alloy bone nail, which comprises:

the magnesium alloy threaded bone nail is internally provided with a hollow cavity which is axially arranged, and the nail wall of the magnesium alloy threaded bone nail close to the nail tail is provided with a plurality of annularly distributed waist cavities;

the metal screw cap is provided with a limiting connecting piece for connecting the magnesium alloy threaded bone screw.

Preferably, the nail tail end of the magnesium alloy threaded bone nail is provided with a plurality of annularly distributed insertion holes.

Preferably, a plurality of overflow holes distributed annularly are formed in the nail body of the magnesium alloy threaded bone nail, and the overflow holes are communicated with the hollow cavity.

Preferably, the hollow cavity arranged in the magnesium alloy threaded bone nail is in two step shapes, and the diameter of the hollow cavity corresponding to the waist-shaped cavity is larger than that of the hollow cavity close to the nail head of the magnesium alloy threaded bone nail.

Preferably, the limiting connecting piece comprises a connecting nail pipe and an inserting rod, the connecting nail pipe is fixedly embedded on the inner wall of the metal nail cap and is communicated with the hollow cavity formed in the metal nail cap, and a plurality of inserting rods distributed in an annular mode are fixedly installed at the pipe head of the connecting nail pipe.

Preferably, the insertion rods in the limiting connecting piece are respectively inserted into insertion holes formed in the magnesium alloy threaded bone nail.

Preferably, the top of the metal nail cap is provided with a cross-shaped groove.

Compared with the related technology, the self-degradation expansion magnesium alloy bone nail provided by the invention has the following beneficial effects:

1. the magnesium alloy threaded bone nail is screwed into a bone hole of a patient, and after the screwing-in is finished, the metal nail cap is slid upwards to enable the inserting rod to slip from the inserting hole, so that the metal nail cap is separated from the magnesium alloy threaded bone nail, the magnesium alloy threaded bone nail can be effectively degraded when the patient is recovered in the subsequent process, and no nail cap residue exists on the surface of the connecting part;

2. the magnesium alloy threaded bone nail is screwed in continuously after the magnesium alloy threaded bone nail is screwed, so that the nail wall around the waist cavity is bent and expanded under the extrusion of the bone surface of the magnesium alloy threaded bone nail, and the firmness of the magnesium alloy threaded bone nail is improved.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the self-degradation expansion magnesium alloy bone nail provided by the invention;

FIG. 2 is a schematic structural view of the magnesium alloy threaded bone screw shown in FIG. 1;

fig. 3 is a schematic structural view of the metal nail head shown in fig. 1.

Reference numbers in the figures: 1. magnesium alloy threaded bone screws; 2. a metal nail cap; 3. a hollow cavity; 4. an overflow aperture; 5. a waist cavity; 6. inserting the holes; 7. a limiting connecting piece; 71. connecting the nail tube; 72. inserting the rod; 8. a cross-shaped groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Referring to fig. 1 to 3, in an embodiment of the present invention, a self-degradation expansion magnesium alloy bone nail is provided, which includes: a magnesium alloy screw thread bone nail 1 and a metal nail cap 2.

In an embodiment of the present invention, referring to fig. 1 and 3, an axially disposed hollow cavity 3 is disposed in the magnesium alloy threaded bone nail 1, a plurality of annularly distributed insertion holes 6 are disposed at an end head of a nail tail of the magnesium alloy threaded bone nail 1, a limiting connector 7 for connecting the magnesium alloy threaded bone nail 1 is mounted on the metal nail cap 2, the limiting connector 7 includes a connecting nail tube 71 and an insertion rod 72, the connecting nail tube 71 is fixedly embedded on an inner wall of the metal nail cap 2 and is communicated with the hollow cavity 3 disposed on the metal nail cap 2, a plurality of annularly distributed insertion rods 72 are fixedly mounted at a head of the connecting nail tube 71, the insertion rods 72 in the limiting connector 7 are respectively inserted into the insertion holes 6 disposed on the magnesium alloy threaded bone nail 1, and a cross slot 8 is disposed at a top of the metal nail cap 2.

It should be noted that: during the use, insert the pole 72 of establishing on the metal nail cap 2 and insert respectively and establish to the magnesium alloy screw thread bone nail 1 and go up the hole 6 of establishing of seting up of establishing for metal nail cap 2 constitutes the integration with magnesium alloy screw thread bone nail 1, follow-up precession magnesium alloy screw thread bone nail 1 is downthehole to the patient's bone, after the precession finishes, go up slide metal nail cap 2 and make and insert pole 72 and establish the downthehole slippage from inserting, thereby with metal nail cap 2 and the separation of magnesium alloy screw thread bone nail 1, so that the patient can effectively degrade magnesium alloy screw thread bone nail 1 when the follow-up recovered recovery is healed, and make the surface of junction not have the nail cap to remain.

In an embodiment of the present invention, please refer to fig. 1 and 2, a plurality of overflow holes 4 are formed in a nail body of the magnesium alloy threaded bone nail 1, a plurality of waist cavities 5 are formed in a nail wall of the magnesium alloy threaded bone nail 1 near a nail tail, the overflow holes 4 are communicated with the hollow cavities 3, the hollow cavities 3 formed in the magnesium alloy threaded bone nail 1 are in two step shapes, and a diameter of the hollow cavity 3 corresponding to the waist cavity 5 is greater than a diameter of the hollow cavity 3 of the magnesium alloy threaded bone nail 1 near the nail head.

It should be noted that: continue to screw in magnesium alloy screw thread bone nail 1 after magnesium alloy screw thread bone nail 1 screws, consequently the nail wall of waist die cavity 5 periphery appears outer song, inflation under the extrusion of bone surface in magnesium alloy screw thread bone nail 1 to magnesium alloy screw thread bone nail 1's fastness has been improved: with metal nail cap 2 and the separation back of magnesium alloy screw thread bone nail 1, through pouring into bone cement from cavity 3, bone cement overflows around magnesium alloy screw thread bone nail 1 through overflow hole 4 to can in time carry out fine fixed to bone grafting, bone nail and bone tissue, further strengthen the fastness of magnesium alloy screw thread bone nail 1.

The working principle of the self-degradation expansion magnesium alloy bone nail provided by the invention is as follows:

during the use, insert the pole 72 of establishing of inserting on the metal nail cap 2 respectively and establish inserting to set up on magnesium alloy screw thread bone nail 1 establish in the hole 6, make metal nail cap 2 and magnesium alloy screw thread bone nail 1 constitute the integration, follow-up in 1 precession of magnesium alloy screw thread bone nail to the patient's bone hole, the back that the precession finishes, go up slide metal nail cap 2 and make and insert pole 72 and establish the interior slippage of hole 6 from inserting, thereby with metal nail cap 2 and the separation of magnesium alloy screw thread bone nail 1, so that the patient can effectively degrade magnesium alloy screw thread bone nail 1 when follow-up recovered recovery is healed, and make the surperficial no nail cap of junction remain, and continue to screw in magnesium alloy screw thread bone nail 1 after screwing, consequently, the outer song appears in the peripheral nail wall of waist die cavity 5 under the extrusion of magnesium alloy screw thread bone nail 1 at the bone surface, the inflation, thereby magnesium alloy screw thread bone nail 1's fastness has been improved: with metal nail cap 2 and the separation back of magnesium alloy screw thread bone nail 1, through pouring into bone cement from cavity 3, bone cement overflows around magnesium alloy screw thread bone nail 1 through overflow hole 4 to can in time carry out fine fixed to bone grafting, bone nail and bone tissue, further strengthen the fastness of magnesium alloy screw thread bone nail 1.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.