CN108577911A - A kind of riveting device for fixing high intensity suture - Google Patents

Abstract

The invention relates to a rivet device for fixing high-strength sutures, comprising a main nail and two locking nails, the main nail includes a columnar main nail body, and two There is a locking through hole arranged obliquely, and two locking nails are arranged in the shape of "eight" after passing through the corresponding locking through holes respectively. The lower part of the main nail body has a suture through hole. A compression bolt is also installed on the middle part of the top surface, and the bottom of the compression bolt extends into the suture through hole, so as to solve the problem that the existing rivet has insufficient fixing strength and is easy to pull out and become invalid.

Description

A rivet device for fixing high-strength sutures

technical field

The invention relates to the field of medical instruments, in particular to a rivet device for fixing high-strength sutures.

Background technique

In the field of sports medicine, rivets are one of the important internal fixation devices. At present, the clinical applications are mainly imported products. In addition to being expensive, various products still have many shortcomings and need to be improved urgently. The main problems of similar products imported at present are: 1. The number of fixed sutures is small, and generally only 4 strands of No. 2 fiberwire (fiber silk) sutures or 2 strands of No. 5 Axibang sutures can be fixed; 2. Rivets made of PEEK material are prone to rivet breakage during installation; 3. For osteoporosis patients, there are still insufficient rivet fixation strengths, which are easy to pull out and fail; 4. Similar imported rivets are generally limited to rotator cuff repair Applications.

Contents of the invention

The present invention aims to provide a rivet device for fixing high-strength sutures to solve the above-mentioned problems.

The specific plan is as follows:

A rivet device for fixing high-strength sutures, comprising a main nail and two locking nails, the main nail includes a columnar main nail body, and the opposite ends of the top surface of the main nail body have an inclined The locking through holes provided, two locking nails pass through the corresponding locking through holes respectively and are arranged in the shape of "eight", the lower part of the main nail body has a suture through hole, and the top surface of the main nail body A compression bolt is installed in the middle part, and the bottom of the compression bolt extends into the suture through hole.

Further, the lower part of the main nail body is in the shape of a cone, and a plurality of inverted tooth structures are arranged on the outer wall of the upper part of the main nail body.

Further, the outer sidewall of the main nail body includes two opposite first outer sidewalls and a second outer sidewall transitionally connecting the two first outer sidewalls, and the two openings of the suture through hole are respectively located at the first On the outer wall, the second outer wall is provided with a barbed tooth structure.

Further, the first outer wall is a smooth surface.

Further, the first outer side wall is a plane, and the second outer side wall is a convex arc surface.

Further, the two locking nails respectively extend from the top surface of the main nail body to the outside of the two second outer side walls.

Further, the angle between the axes of the two locking nails is 60°.

Further, the locking nail, the main nail body and the compression bolt are all made of titanium alloy.

Further, the top surface of the main nail body is in the shape of an arc surface, and the two locking through holes on the top surface of the main nail body are respectively arranged at opposite ends of the arc surface.

Further, the suture through hole is an oval through hole, and the semi-major axis of the oval through hole extends along the length direction of the main nail body.

Compared with the prior art, a rivet device for fixing high-strength sutures provided by the present invention has the following advantages:

1. The rivet device consists of the main nail and two cross-locking nails, which have stronger pull-out resistance. For patients with severe osteoporosis, the cross-locking nail can be fixed to the opposite side of the cortex, and the inverted tooth structure on the lateral wall can It can effectively prevent the rivets from being pulled out and fail; and it has a wider range of applications. It can be used for external fixation in rotator cuff repair, and can also be used for reinforcement and fixation of the tibial end in cruciate ligament reconstruction.

2. Increase the volume of the oval suture hole at the tip of the rivet to accommodate more than 8 No. 2 fiberwire sutures.

Description of drawings

Figure 1 shows a schematic diagram of a riveting device.

Figure 2 shows a front view of the main nail.

Figure 3 shows a side view of the main nail.

Figure 4 shows a bottom view of the main nail.

Figure 5 shows a schematic view of a locking nail.

Fig. 6 shows a schematic diagram of a compression bolt.

Detailed ways

To further illustrate the various embodiments, the present invention is provided with accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with related descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-3, the present invention provides a rivet device for fixing high-strength sutures, the rivet device includes a main nail 1 and two locking nails 2, wherein the main nail 1 includes a columnar main nail The nail body 10 has a locking through hole 100 arranged obliquely on the opposite ends of the top surface of the main nail body 10, so that the two locking nails pass through the corresponding locking through holes 100 and are arranged in a "eight" shape. The lower part of the main nail body 10 has a suture through hole 102, and a compression bolt 3 is also installed on the middle part of the top surface of the main nail body 10, and the bottom of the compression bolt 3 extends to the suture through hole 102. Inside. Wherein the suture through hole 102 is arranged along the axial direction of the main nail body 10 vertically, and the compression bolt 3 extends into the suture through hole from the top surface of the main nail body 10 along the axis direction of the main nail body 10 (in the main nail body 10 The top surface is provided with a screw hole communicating with the suture through hole 102, and the compression bolt 3 is screwed on the screw hole. According to the number of sutures in the suture through hole 102, the compression bolt 3 can be rotated to adjust the compression. The tightness that the bolt 3 squeezes the suture), the high-strength suture passing through the suture through hole 102 is pressed by the bottom surface of the compression bolt 3 so as to be fixed on the main nail body. The rivet device consists of a main nail 1 and two cross-set locking nails 2, which have stronger pull-out resistance, especially for patients with severe osteoporosis, the cross-set locking nails 2 can be fixed to the contralateral cortex Inside, it can effectively prevent the rivet device from being pulled out and failing.

In this embodiment, the above-mentioned main nail 1, the two locking nails 2 and the compression bolt 3 are all preferably made of medical titanium alloy material (such as Ti-6Al-4V), so that its strength is better than that of the existing PEEK For rivets made of different materials, under the premise of ensuring that the strength meets the requirements, the size of the suture through hole 102 can also be larger, so that it can pass through more sutures. For example, in this embodiment, the suture through hole 102 It is an elliptical through hole, the semi-major axis of the ellipse-shaped through hole extends along the length direction of the main nail body 10, and the semi-minor axis is perpendicular to the axis of the long plate. The maximum diameter of the main nail body is 5mm, and the major axis and minor axis of the oval suture through hole 102 can reach 3mm and 1.5mm, which can accommodate more than 8 No. 2 fiberwire sutures.

Referring to Fig. 1-Fig. 3, in the present embodiment, the lower part of the main nail body 10 is conical, and a plurality of inverted tooth structures 104 are arranged on the outer wall of the upper part of the main nail body 10, wherein the main conical shape The lower part of the nail body is to facilitate the insertion of the main nail body 10 during the operation, while the inverted tooth structure 104 is to prevent the main nail body 10 from having the function of anti-extraction. The inverted tooth structure 104 can be directly attached to the main nail body by machining. 10, so that the main nail body 10 is more stable after being fixed on the bone.

Referring to Fig. 4, the cross-section of the main nail body 10 is similar to a straight-sided elliptical shape, and the outer sidewall of the main nail body 10 includes two opposite first outer sidewalls 10a and two transitionally connected two first outer sidewalls. The second outer sidewall 10b, that is, the two first outer sidewalls 10a and the two second outer sidewalls 10b encircle four sides similar to a straight-sided oval shape, wherein the two openings of the suture through hole 102 are respectively located The two first outer sidewalls 10a, while the inverted tooth structure 104 is arranged on the second outer sidewall. Among them, preferably, the first outer side wall 10a is a smooth surface, so as to prevent suture damage.

Further preferably, the first outer sidewall 10a is a plane, and the second outer sidewall 10b is a convex arc surface, so as to facilitate the insertion of the main nail body 10 during the operation. Referring to Fig. 3 and Fig. 4, there are a plurality of inverted tooth structures 104 arranged at intervals from top to bottom on both sides of each second outer side wall, and the outer peripheral edge of the inverted tooth structure is in a convex arc with the second outer side wall 10b With the same arc shape, the inverted tooth structure 104 has better pull-out resistance.

Referring to Figures 1-4, in this embodiment, two locking nails 2 extend from the top surface of the main nail body 10 to the outer sides 10b of the two second outer walls, so that the locking nails 2 will not interfere with the sutures . The angle between the axes of the two locking nails 2 is preferably 60°, so that it has wider applicability, for example, it can be used for external fixation in rotator cuff repair, and can also be used for strengthening fixation of the tibial end in cruciate ligament reconstruction. .

Referring to Fig. 1 and Fig. 2, the top surface of the main nail body 10 is in the shape of a circular arc surface, and the two locking through holes 100 on the top surface of the main nail body 10 are located on the two ends of the adjacent arc respectively, so that the locking nails 2 After passing through the locking through hole 100, the top cap of the locking nail 2 does not exceed the highest point of the main nail body, that is, does not exceed the arc surface, which can reduce irritation to soft tissues.

Referring to FIG. 5 , the locking nail 2 is a self-tapping screw with threads on its entire body, and the nail head of the locking nail 2 is designed with an inner torx or an inner hexagonal nut.

Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined by the appended claims. Making various changes is within the protection scope of the present invention.

Claims (10)

1. a kind of riveting device for fixing high intensity suture, it is characterised in that：It is described including a main nail and two pieces of locking nails Main nail includes a columnar main rivet nut, all with a locking through-hole being obliquely installed on the opposite both ends in the top surface of main rivet nut, two Piece locking nail is in " eight " set up of character patt ern after being each passed through corresponding locking through-hole, and there is a suture to lead to for the lower part of the main rivet nut Hole is also equipped with a hold-down bolt on the middle part of the top surface of the main rivet nut, and the bottom of the hold-down bolt extends to suture through-hole It is interior.

2. riveting device according to claim 1, it is characterised in that：The lower part of the main rivet nut is cone shape, described Multiple pawl structures are provided on the lateral wall on main rivet nut top.

3. riveting device according to claim 2, it is characterised in that：The lateral wall of the main rivet nut includes two opposite First lateral wall and two the second lateral walls for connecting two the first lateral wall transition, two openings of the suture through-hole It is located on two the first lateral walls, second lateral wall is both provided with pawl structure.

4. riveting device according to claim 3, it is characterised in that：First lateral wall is shiny surface.

5. riveting device according to claim 3, it is characterised in that：First lateral wall is plane, outside described second Side wall is the circular arc camber of evagination.

6. riveting device according to claim 3, it is characterised in that：Two pieces of locking nails extend from the top surface of main rivet nut respectively To outside two the second lateral walls.

7. riveting device according to claim 6, it is characterised in that：Angle between the axis of two pieces of locking nails is 60 °.

8. riveting device according to claim 1, it is characterised in that：The locking nail, main rivet nut and hold-down bolt by Titanium alloy material is made.

9. riveting device according to claim 1, it is characterised in that：The top surface of the main rivet nut is circular arc camber shape, Two locking through-holes on the top surface of main rivet nut are respectively arranged on the opposite both ends of circular arc camber.

10. riveting device according to claim 1, it is characterised in that：The suture through-hole is ellipse hole, the ellipse The major semiaxis of shape through-hole extends along the length direction of main rivet nut.