Split type multidirectional fixing anchor with line

Abstract

The utility model relates to the field of sports medicine implants, in particular to a split type multidirectional fixing anchor with a thread, which comprises an integrally formed anchor body and a plate-shaped threading ring, a plurality of threading holes are arranged in the circumferential direction of the threading ring, and the anchor body and the threading ring are detachably and fixedly connected. The plurality of threading holes arranged in the circumferential direction of the threading ring have the effect of connecting and fixing soft tissues in multiple directions, and the threading ring also has the effects of pressing the soft tissues and promoting healing. Meanwhile, the rivet body and the threading ring are detachably connected, the threading rings with different hole diameters and hole numbers can be adopted for different surgical parts according to surgical requirements, and the threading rings can be freely combined with the rivet bodies with different diameters to form the rivets with various specifications.

Description

Technical Field

[0001] The utility model relates to a sports medicine medical implant, in particular to a split multi-directional fixed belt line anchor. Background Art

[0002] In clinical practice, the wire anchor reconnects the soft tissue and bone through sutures. The wire anchor is implanted in the bone to fix the torn soft tissue to achieve the purpose of soft tissue and bone healing. The wire anchor can be used in surgical sites such as the shoulder joint, elbow joint, hand and wrist joint, knee joint, foot and ankle joint, and pelvis. The amount and size of soft tissue in different surgical sites, as well as the size and protrusion of the bone surface are different, which requires the wire anchor to have different numbers of threading holes, threading hole diameters, and nail bodies of different sizes. For example, a larger area of ​​soft tissue tear requires thicker or more sutures. Thicker sutures require larger threading holes, and more sutures require more threading holes; when the surgical site changes, nail bodies of different sizes may also be required. For example, announcement number CN 203153839 discloses a multi-wire hole anchor for soft tissue repair and fixation, including a nail seat and a nail head. The diameter and number of the through holes (i.e., threading holes) of the nail seat are fixed, wherein the nail seat and the nail head are integrally formed, and the nail seat and the nail head cannot be combined to change the wire anchor of different specifications. It cannot meet the needs of different surgical scenarios and requires anchors of different specifications. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a split multi-directional fixed belt line anchor.

[0004] The utility model adopts the following technical solutions:

[0005] A split multi-directional fixed belt line anchor, comprising:

[0006] An integrally formed nail body, the outer wall of which is provided with continuous threads arranged in a spiral shape and having an outer diameter, the head of the nail body is provided with a cutting groove with a sharp cutting edge, and the tail of the nail body is provided with a hexagonal rod for engaging a driving tool;

[0007] A plate-shaped threading ring, the threading ring has a central axis O perpendicular to the threading ring, an upper surface away from the bone surface, a lower surface close to the bone surface, and a through hole coaxial with the central axis O, the lower surface includes a first lower surface and a second lower surface, the first lower surface is arranged along the circumference of the through hole, the second lower surface is the surface from the outer edge of the threading ring to the first lower surface, the threading ring is provided with a plurality of independent threading holes connecting the upper surface and the second lower surface, the plane where the through hole opening on the lower surface is located is taken as the reference plane H, there is a gap α between the second lower surface and the reference plane H, the nail body passes through the through hole, the threading ring is vertically sleeved on the position of the nail body close to the hexagonal rod, and the threading ring and the nail body are detachably fixedly connected.

[0008] In the utility model, there is a gap between the second lower surface and the reference surface in order to facilitate the pulling of sutures. When the wire anchor is implanted into the bone and the soft tissue is fixed to the wire anchor, a gap is left between the bone surface and the lower surface, so that the sutures can be pulled easily. When there is no gap between the second lower surface and the reference surface, when the threading ring contacts the bone surface and there is no gap between them, it is difficult to pull the sutures, or when soft tissue is squeezed under the threading ring, the soft tissue may be cut when the sutures are pulled.

[0009] Preferably, the threading ring and the nail body are interference connected, the through hole is set as an inner hexagonal tapered hole, the position of the nail body close to the hexagonal rod is set as a hexagonal cone that gradually increases toward the head of the nail body, and the inner hexagonal tapered hole passes through the hexagonal rod and is interference fit with the hexagonal cone.

[0010] Preferably, the threading ring is threadedly connected to the nail body, an internal thread is provided on the inner wall of the through hole, and an external thread matching the internal thread is provided at a position of the nail body close to the hexagonal rod.

[0011] Preferably, the threading ring and the nail body are connected by a pin, a pin hole penetrating the inner wall of the through hole is provided on the outer edge wall of the threading ring, a radial hole is provided on the nail body near the hexagonal rod, and the pin passes through the pin hole and the radial hole to fix the threading ring and the nail body in connection.

[0012] Preferably, the first lower surface is set as a plane perpendicular to the central axis O, the second lower surface is set to be parallel to the first lower surface, and the gap α between the second lower surface and the reference plane H has the same width.

[0013] Preferably, the lower surface is a conical surface or a curved surface, and a gap α between the lower surface and the reference plane H along the outer edge direction of the threading ring becomes larger and larger.

[0014] Preferably, the threading hole has a rounded corner. The arc transition design of the two side holes of the threading hole makes it difficult to cut the suture, thereby improving the stability of the anchor after surgery.

[0015] Preferably, the second lower surface is provided with an annular groove arranged around the through hole, the side of the annular groove close to the outer edge of the threading ring is provided with a rounded corner, the threading hole is provided on the bottom surface of the annular groove, the diameter of the threading hole is equal to the width of the annular groove, and the opening of the threading hole close to the outer edge of the threading ring forms a rounded and smooth transition with the annular groove. The rounded and smooth transition structure makes it difficult to cut the suture.

[0016] Preferably, the threading holes are arranged along the circumference of the through hole.

[0017] Preferably, the number of the threading holes is 8.

[0018] Beneficial effects of the utility model:

[0019] 1. By providing a plurality of threading holes arranged along the circumference of the through hole on the threading ring, the anchor can connect and fix multiple soft tissues in multiple directions;

[0020] 2. The soft tissue under the threading ring is squeezed toward the bone surface by the threading ring, and the threading ring also has the function of pressurizing and fixing the soft tissue;

[0021] 3. The nail body and the threading ring are detachably connected. Threading rings with different hole diameters and numbers of holes can be combined with nail bodies of different diameters to form anchor nails of various specifications. According to surgical needs, when the threading ring diameter is different, the soft tissue pressure area is also different; different hole diameters can better cooperate with sutures of various specifications, so as to achieve the best suture fixation effect. In addition, when assembling the anchor nail, the suture is passed through the threading ring and then connected to the nail body, which is convenient for threading and can effectively prevent the assembler from being stabbed by the nail head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a partial cross-sectional view of the anchor with wire in Example 1;

[0023] Figure 2 is a front view of the threading ring of embodiment 1;

[0024] Figure 3 is a partial cross-sectional view of the anchor with wire in Example 2;

[0025] Figure 4 is a partial cross-sectional view of the anchor with wire in Example 3;

[0026] Figure 5 This is a diagram showing the use status of the wire anchor nail of the utility model.

[0027] In the figure, 1 is an anchor, 2 is a nail body, 21 is a cutting groove, 22 is a hexagonal rod, 23 is a hexagonal cone, a radial hole 24, 3 is a threading ring, 31 is a threading hole, 32 is an inner hexagonal cone hole, 33 is an annular groove, a pin hole 34, a through hole 35, an upper surface 36, a lower surface 37, a first lower surface 371, a second lower surface 372, 4 is a pin, 5 is a suture, 6 is a bone, and 7 is a soft tissue. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the bone screw of the utility model is further described in detail through embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described here are only for explanation and are not used to limit the utility model.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. A split multi-directional fixed anchor with a wire, the anchor with a wire is used to connect soft tissue to bones through sutures, comprising: an integrally formed nail body, the outer wall of the nail body is provided with a continuous thread arranged in a spiral shape and having an outer diameter, the head of the nail body is provided with a cutting groove with a sharp edge, and the tail of the nail body is provided with a hexagonal rod for engaging a driving tool;

[0030] A plate-shaped threading ring, the threading ring has a central axis O perpendicular to the threading ring, an upper surface away from the bone surface, a lower surface close to the bone surface, and a through hole coaxial with the central axis, the lower surface includes a first lower surface and a second lower surface, the first lower surface is arranged along the circumference of the through hole, the second lower surface is the surface from the outer edge of the threading ring to the first lower surface, the threading ring is provided with a plurality of independent threading holes connecting the upper surface and the second lower surface, the plane where the through hole opening on the lower surface is located is taken as the reference plane H, there is a gap α between the second lower surface and the reference plane H, the nail body passes through the through hole, the threading ring is vertically sleeved on the position of the nail body close to the hexagonal rod, and the threading ring and the nail body are detachably fixedly connected.

[0031] When the width of the gap α is equal, the first lower surface is a plane perpendicular to the central axis O, and the second lower surface is set to be parallel to the first lower surface; when the gap α becomes larger and larger from the central axis O to the outer edge of the threading ring, the lower surface is a conical surface or a curved surface. In this way, there is a gap between part of the lower surface of the threading ring and the bone surface or soft tissue, which makes it easy to pull out the suture and helps to protect the suture or soft tissue. There are a variety of threading rings with different numbers and diameters of threading holes, and there are also a variety of specifications for the diameter and length of the nail body. The threading ring and the nail body can be freely combined according to different surgical sites. The upper surface can be a plane, a cone, or a curved surface. Example

[0032] like Figure 1 As shown, a split multi-directional fixed anchor nail 1 includes: an integrally formed nail body 2 and a plate-shaped threading ring 3, the outer wall of the nail body 2 is provided with a continuous thread arranged in a spiral shape and having an outer diameter, the head of the nail body is provided with a cutting groove 21 with a sharp cutting edge, and the tail of the nail body is provided with a hexagonal rod 22 for engaging a driving tool; the threading ring 3 has a lower surface 37 close to the bone surface, an upper surface 36 away from the bone surface, a central axis O of the threading ring 3 and a through hole 35 coaxial with the central axis O, the lower surface 37 includes a first lower surface 371 and a second lower surface 372, the first lower surface 371 is arranged along the circumference of the through hole 35, and is a plane and perpendicular to the central axis O, at this time, the first lower surface The plane where the opening of the through hole 35 on the upper surface 371 and the lower surface 37 are located coincides, the second lower surface 372 is the surface outside the first lower surface 371, the second lower surface 372 is parallel to the first lower surface 371, and the threading ring 3 is provided with 8 independent threading holes 31 connecting the upper surface 36 and the second lower surface 372, the threading holes 31 are used for suture routing, and the threading holes 31 are evenly distributed along the circumference of the through hole 35, with the first lower surface 371 as the reference plane H, and there is a gap α of equal width between the second lower surface 372 and the reference plane H, the nail body 2 passes through the through hole 35, the threading ring 3 is vertically sleeved on the nail body 2 near the hexagonal rod 22, and the threading ring 3 and the nail body 2 are interference connected.

[0033] like Figure 1 and 2 As shown, the through hole 35 is set as a hexagonal tapered hole 32 with a taper of 6°, and the position of the nail body 2 close to the hexagonal rod 22 is set as a hexagonal cone 23 that gradually becomes larger toward the head direction of the nail body 2. The taper of the hexagonal cone 23 is 6°, and the hexagonal tapered hole 32 passes through the hexagonal rod 22 and is interference fit with the hexagonal cone 23.

[0034] In order to prevent the suture from being cut, the opening of the threading hole 31 is provided with a rounded corner or a chamfered corner.

[0035] The second lower surface 372 is provided with an annular groove 33 arranged around the through hole 35. The side of the annular groove 33 near the outer edge of the threading ring 3 is provided with a rounded corner. The threading hole 31 is provided on the bottom surface of the annular groove 33. The diameter of the threading hole 31 is equal to the width of the annular groove 33. The opening of the threading hole 31 near the outer edge of the threading ring 3 forms a rounded and smooth transition with the annular groove 33. The annular groove 33 is provided to facilitate the formation of an opening with a rounded and smooth transition on the threading ring, and to facilitate the processing of a through hole in the annular groove. If the lower surface is a conical surface or an arc surface, drilling a through hole on the lower surface of the arc surface or the conical surface is prone to slippage or deviation. Example

[0036] The anchor nail of this embodiment is the same as the anchor nail of embodiment 1, except that the number of threading holes is different, the lower surface is set as a conical surface, and the connection method between the nail body and the threading ring is different:

[0037] like Figure 3 As shown, a split multi-directional fixed anchor nail with wire includes: an integrally formed nail body 2 and a plate-shaped threading ring 3, the outer wall of the nail body 2 is provided with a continuous thread arranged in a spiral shape and having an outer diameter, the head of the nail body 2 is provided with a cutting groove 21 with a sharp edge, and the tail of the nail body 2 is provided with a hexagonal rod 22 for engaging a driving tool; it has a lower surface 37 close to the bone surface, an upper surface 36 away from the bone surface, a central axis O perpendicular to the threading ring 3 and a through hole 35 coaxial with the central axis O, the lower surface 37 is a conical surface, including a first lower surface 371 and a second lower surface 372, the first lower surface 371 is arranged along the circumference of the through hole 35, and the second lower surface 372 is arranged along the circumference of the through hole 35. 72 is the surface from the outer edge of the threading ring 3 to the first lower surface 371. The threading ring 3 is provided with 9 independent threading holes 31 connecting the upper surface 36 and the second lower surface 372. The threading holes 31 are used for suture routing. The threading holes 31 are evenly distributed along the circumference of the through hole 35. The plane where the through hole 35 on the lower surface 37 is located is the reference plane H. There is a gap α between the second lower surface 372 and the reference plane H. At this time, the gap α from the center axis O to the outer edge of the threading ring 3 becomes larger and larger. The nail body 2 passes through the through hole 35, and the threading ring 3 is vertically sleeved on the nail body 2 near the hexagonal rod, and the threading ring 3 and the nail body 2 are threadedly connected.

[0038] like Figure 3 As shown, in this embodiment, an internal thread is provided on the inner edge wall of the threading ring 3, and an external thread matching the internal thread is provided at a position of the nail body 2 close to the hexagonal rod 22. Example

[0039] The anchor nail of this embodiment is the same as the anchor nail of embodiment 2, except that the lower surface is a curved surface, and the connection method between the nail body and the threading ring is different:

[0040] like Figure 4As shown, a split multi-directional fixed anchor nail with wire includes: an integrally formed nail body and a plate-shaped threading ring, the outer wall of the nail body is provided with a continuous thread arranged in a spiral shape and having an outer diameter, the head of the nail body is provided with a cutting groove with a sharp edge, and the tail of the nail body is provided with a hexagonal rod for engaging a driving tool; it has a lower surface 37 close to the bone surface, an upper surface 36 away from the bone surface, a central axis O perpendicular to the threading ring 3 and a through hole 35 coaxial with the central axis O, the lower surface 37 is an arc surface, including a first lower surface 371 and a second lower surface 372, the first lower surface 371 is arranged along the circumference of the through hole 35, and the second lower surface 372 is The surface from the outer edge of the threading ring 3 to the first lower surface 371 is provided with 9 independent threading holes 31 connecting the upper surface 36 and the second lower surface 372. The threading holes 31 are used for suture routing. The threading holes 31 are evenly distributed along the circumference of the through hole 35. The plane where the through hole 35 on the lower surface 37 is located is taken as the reference plane H. There is a gap α between the second lower surface 372 and the reference plane H. At this time, the gap α from the center axis O to the outer edge of the threading ring 3 becomes larger and larger. The nail body 2 passes through the through hole 35, and the threading ring is vertically sleeved on the nail body near the hexagonal rod, and the threading ring and the nail body are connected by a pin.

[0041] like Figure 4 As shown, in this embodiment, a pin hole 34 penetrating the inner wall of the through hole 35 is provided on the outer edge wall of the threading ring, and a radial hole 24 is provided at a position of the nail body close to the hexagonal rod. The pin 4 passes through the pin hole 34 and the radial hole 24 to fix the threading ring 3 and the nail body 2 in connection.

[0042] During the operation, the anchor 1 with suture 5 is first screwed into the bone through a tool to fix the anchor 1 to the bone 6, and then the suture is connected to the soft tissue to complete the operation. In order to further strengthen the fixation of the soft tissue, part of the soft tissue 7 is placed under the threading ring, and the threading ring 3 is pressed against the bone surface, which has the function of pressurizing and fixing the soft tissue. According to the number of soft tissue breaks, the other suture holes on the anchor are used to repair or fix multiple broken soft tissues from multiple directions. Figure 5 The figure shows the state of the anchor after being implanted in the human body. According to the amount and size of soft tissue in different surgical sites, and the size and protrusion of the bone surface, the threading ring and the nail body can be flexibly combined to form anchors of different specifications.

[0043] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A split multi-directional fixed belt line anchor, characterized in that: include: An integrally formed nail body, the outer wall of which is provided with continuous threads arranged in a spiral shape and having an outer diameter, the head of the nail body is provided with a cutting groove with a sharp cutting edge, and the tail of the nail body is provided with a hexagonal rod for engaging a driving tool; A plate-shaped threading ring, the threading ring has a central axis O perpendicular to the threading ring, an upper surface away from the bone surface, a lower surface close to the bone surface, and a through hole coaxial with the central axis O, the lower surface includes a first lower surface and a second lower surface, the first lower surface is arranged along the circumference of the through hole, the second lower surface is the surface from the outer edge of the threading ring to the first lower surface, the threading ring is provided with a plurality of independent threading holes connecting the upper surface and the second lower surface, the plane where the through hole opening on the lower surface is located is taken as the reference plane H, there is a gap α between the second lower surface and the reference plane H, the nail body passes through the through hole, the threading ring is vertically sleeved on the position of the nail body close to the hexagonal rod, and the threading ring and the nail body are detachably fixedly connected.

2. The split multi-directional fixed belt line anchor according to claim 1 is characterized in that: The threading ring and the nail body are interference connected, the through hole is set as an inner hexagonal cone hole, the position of the nail body close to the hexagonal rod is set as a hexagonal cone that gradually increases toward the head of the nail body, and the inner hexagonal cone hole passes through the hexagonal rod and is interference fit with the hexagonal cone.

3. The split multi-directional fixed belt line anchor according to claim 1, characterized in that: The threading ring is threadedly connected to the nail body, an internal thread is arranged on the inner wall of the through hole, and an external thread matching with the internal thread is arranged at a position of the nail body close to the hexagonal rod.

4. The split multi-directional fixed belt line anchor according to claim 1, characterized in that: The threading ring and the nail body are connected by a pin. A pin hole penetrating the inner wall of the through hole is provided on the outer edge wall of the threading ring. A radial hole is provided on the nail body near the hexagonal rod. The pin passes through the pin hole and the radial hole to fix the threading ring and the nail body in connection.

5. The split multi-directional fixed belt line anchor according to any one of claims 1 to 4, characterized in that: The first lower surface is set as a plane perpendicular to the central axis O, the second lower surface is set to be parallel to the first lower surface, and the gap α between the second lower surface and the reference plane H has the same width.

6. The split multi-directional fixed belt line anchor according to any one of claims 1 to 4, characterized in that: The lower surface is a conical surface or a curved surface, and the gap between the lower surface and the reference plane H becomes larger along the outer edge direction of the threading ring.

7. The split multi-directional fixed belt line anchor according to claim 5, characterized in that: The opening of the threading hole is provided with a rounded corner or a chamfered corner.

8. The split multi-directional fixed belt line anchor according to claim 7, characterized in that: The second lower surface is provided with an annular groove arranged around the through hole, and the side of the annular groove close to the outer edge of the threading ring is provided with a chamfered corner. The threading hole is arranged on the bottom surface of the annular groove. The diameter of the threading hole is equal to the width of the annular groove, and the opening of the threading hole close to the outer edge of the threading ring forms a rounded and smooth transition with the annular groove.

9. The split multi-directional fixed belt line anchor according to claim 1, characterized in that: The threading holes are arranged along the circumference of the through hole.

10. The split multi-directional fixed belt line anchor according to claim 1, characterized in that: The number of the threading holes is 8.

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