CN217447884U - Expansion anchor and bone block - Google Patents

Abstract

The utility model provides an inflation anchor nail and bone fragment, include: a conical expansion body, a suture, an anchor body and a driver; the conical expansion body is arranged in a port at one end of the anchor bolt body, the driver is arranged at the other end of the anchor bolt body, and the anchor bolt body is driven to rotate by the driver; one end of the suture is connected with the conical expansion body, and the other end of the suture extends out of the other end of the anchor body and is guided into the driver; the end of the anchor nail body, which is used for installing the conical expansion body, is provided with a tooth-inverted groove; when the suture is pulled, the conical expansion body slides towards the anchor nail body, and the conical expansion body props the anchor nail body through the tooth chamfering groove. The device enables the anchor bolt body to expand through the sliding of the conical expansion body, and solves the problems that the conventional anchor bolt is not firm in fixation and is easy to fall off.

Description

Expansion anchor and bone block

Technical Field

The utility model relates to an anchor nail structure field specifically, relates to inflation anchor nail and bone piece.

Background

The anchor is mainly used for tendon soft tissue injuries such as shoulder joints, knee joints and the like clinically, and the torn tendon tissue is fixed on the bone by implanting the anchor into a bone hole and utilizing a suture, so that the aim of healing the tendon and bone is fulfilled. The tendon bone is tissue which needs to be moved frequently, so that the anchor is required to have strong stability. The problem that current anchor still has fixed not jail, easy drop, and this patent aims at providing reasonable anchor structure for solving this problem.

Patent document CN112244914A relates to an extrusion type expansion anchor, which comprises an anchor body and an expansion element, wherein a notch is arranged near the front end of the anchor body, the expansion element is used for inserting into the inner cavity of the anchor body from the rear end of the anchor body to radially expand the front end of the anchor body, and an a is arranged on the inner side wall of the anchor body; the expansion element is of a columnar structure, and the side wall of the expansion element is provided with a B; a and B are mutually matched to form stop clamping matching. This patent has increased the resistance to plucking out of the anchor nail body through the expanding structure that can the auto-lock and has exerted for the anchor nail body is difficult for droing after implanting in the skeleton, and is different with this patent structure.

Patent document CN1133948A provides an anchor assembly with a plug which is pressed into an anchor seat or sleeve to expand a split end portion thereof by rotating a screw in a predetermined direction which engages the anchor seat or plug via a thread. This patent aims at using the shock-absorbing function of making an uproar that falls of anchor, can not solve conventional anchor and fix not jail, the easy dropout problem.

SUMMERY OF THE UTILITY MODEL

To the defects in the prior art, the utility model aims at providing an expansion anchor nail and bone piece.

According to the utility model provides a pair of inflation anchor nail, include: a conical expansion body, a suture, an anchor body and a driver;

the conical expansion body is arranged in a port at one end of the anchor bolt body, the driver is arranged at the other end of the anchor bolt body, and the anchor bolt body is driven to rotate by the driver;

one end of the suture is connected with the conical expansion body, and the other end of the suture extends out of the other end of the anchor body and is guided into the driver;

the end of the anchor nail body, which is used for installing the conical expansion body, is provided with a tooth-inverted groove;

when the suture is pulled, the conical expansion body slides towards the anchor nail body, and the conical expansion body props the anchor nail body through the tooth chamfering groove.

Preferably, the conical expansion body is provided with a conical shape;

the side surface of the conical expansion body is set to be the conical surface of the expansion body, one end surface of the conical expansion body is set to be the top surface of the expansion body, and the other end of the conical expansion body is set to be the bottom surface of the expansion body;

the area of the top surface of the expansion body is smaller than that of the bottom surface of the expansion body, and the circumference of the conical surface of the expansion body is gradually increased along the direction from the top surface of the expansion body to the bottom surface of the expansion body.

Preferably, a threading hole is formed in the top surface of the expansion body;

the suture passes through the threading hole;

two ends of the suture are respectively arranged as a first end surface and a second end surface of the suture;

the suture first end surface and the suture second end surface are flush;

an anchor body inner hole is formed in the anchor body, and a driver inner hole is formed in the driver;

the suture first end surface and the suture second end surface pass through the anchor body inner hole and are guided into the driver inner hole.

Preferably, the anchor body includes: a threaded portion and an inverted tooth portion;

one end of the threaded part is connected with one end of the inverted tooth part;

a plurality of tooth-chamfering grooves are formed in the tooth chamfering part;

the inverted tooth part groove extends along the axial direction of the inverted tooth part and divides the inverted tooth part into a plurality of inverted tooth lobes;

each inverted tooth valve is connected with the threaded part, and adjacent inverted tooth valves are not connected.

Preferably, the end surface of the threaded part, which faces away from the inverted tooth part, is provided with an anchor first end surface;

the end face of one end, back to the threaded part, of the inverted tooth part is set as an anchor second end face;

an inner hexagonal hole is formed in one end, back to the tooth chamfering part, of the threaded part;

the hexagonal socket hole dorsad an anchor first terminal surface side sets up to hexagonal socket hole bottom surface, hexagonal socket hole circumference face sets up to hexagonal socket hole side.

Preferably, the conical expansion body is partially installed in the inverted tooth part;

the top surface of the expansion body is arranged in the inverted tooth part and faces the threaded part, and the bottom surface of the expansion body is arranged outside the inverted tooth part and faces away from the threaded part;

the outer diameter of the bottom surface of the expansion body is larger than the inner diameter of the inverted tooth part;

when the suture is pulled, the conical expansion body slides towards one end of the threaded part along the inner part of the inverted tooth part, and the inverted tooth valve is expanded by the conical expansion body along the circumferential direction.

Preferably, the driver is provided with an outer hexagonal interface towards one end of the anchor nail body;

the side surface of the outer hexagonal connector is arranged on the periphery of the outer hexagonal connector, and the side, facing the anchor body, of the outer hexagonal connector is arranged as the bottom surface of the outer hexagonal connector;

when the driver is connected with the anchor nail body, the outer hexagonal interface is matched with the inner hexagonal hole;

the bottom surface of the outer hexagonal connector is attached to the bottom surface of the inner hexagonal hole, and the side surface of the outer hexagonal connector is attached to the side surface of the inner hexagonal hole;

when the driver rotates, the driver drives the rivet body to rotate through the matching of the outer hexagonal interface and the inner hexagonal hole.

Preferably, the anchor body is made of a heat-activated material.

Preferably, a bone mass employs the expansion anchor.

Preferably, one side of the bone block is set as the end face of the bone block;

bone block holes are formed in the bone blocks and communicated with the end faces of the bone blocks;

the inner wall of the bone block hole is a cylindrical surface of the bone block hole;

the anchor body is arranged in the bone block hole through the driver, and the first anchor end surface is flush with the bone block end surface;

the inverted tooth portion is expanded by pulling the suture;

teeth are arranged on the outer side of the tooth-chamfering part and are embedded in the bone block hole cylindrical surface.

Preferably, the heat activated material is a nickel titanium alloy.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the device enables the anchor bolt body to expand through the sliding of the conical expansion body, and solves the problems that the conventional anchor bolt is not firmly fixed and is easy to fall off;

2. the anchor body increases fixation strength through the self-expanding nature of the heat activated material.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the internal structure of an expanded anchor when unexpanded;

FIG. 2 is a schematic view of the internal structure of the expanded anchor as it expands;

FIG. 3 is a schematic view of the external structure of an expanded anchor when unexpanded;

FIG. 4 is a schematic view of the external structure of the expanded anchor as it expands;

FIG. 5 is a schematic structural view of a conical expansion body;

FIG. 6 is a schematic diagram of a driver structure;

FIG. 7 is a perspective view of the anchor body;

FIG. 8 is a schematic view of the expanded anchor installed in the bone block without expansion;

FIG. 9 is a schematic view of the expansion anchor expanded when installed in a bone block.

Shown in the figure:

Detailed Description

The present invention will be described in detail with reference to specific embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, an expansion anchor for fixing soft tissues such as tendons and ligaments to an object such as a bone block requiring anchor fixation comprises: a conical expansion body 10, a suture 20, an anchor body 30, and a driver 40; the conical expansion body 10 is arranged in the port at one end of the anchor body 30, the driver 40 is arranged at the other end of the anchor body 30, the anchor body 30 is driven to rotate by the driver 40, one end of the suture 20 is connected with the conical expansion body 10, the other end of the suture 20 extends out of the other end of the anchor body 30 and is led into the driver 40, and the inverted tooth groove 33 is formed in the end of the anchor body 30, where the conical expansion body 10 is arranged; when the suture 20 is pulled, the conical expansion body 10 slides towards the anchor body 30, the conical expansion body 10 props open the anchor body 30 through the inverted tooth groove 33, and the anchor body 30 is made of heat-activated material.

As shown in fig. 7, the anchor body 30 includes: a threaded portion 31 and an inverted tooth portion 32; one end of the thread part 31 is connected with one end of the inverted tooth part 32, a plurality of inverted tooth part grooves 33 are arranged on the inverted tooth part 32, the inverted tooth part grooves 33 extend along the axial direction of the inverted tooth part 32 and divide the inverted tooth part 32 into a plurality of inverted tooth lobes, each inverted tooth lobe is connected with the thread part 31, and adjacent inverted tooth lobes are not connected. Thread portion 31 sets up to an anchor first terminal surface 39 back to the one end terminal surface of portion of falling tooth 32, and portion of falling tooth 32 sets up to an anchor second terminal surface 36 back to thread portion 31 one end terminal surface, and thread portion 31 is back to the inside interior hexagonal socket 35 that sets up of portion of falling tooth 32 one end, and interior hexagonal socket 35 is back to an anchor first terminal surface 39 side and sets up to interior hexagonal socket bottom surface 38, and interior hexagonal socket 35 circumference face sets up to interior hexagonal socket side 37.

As shown in fig. 5, the conical expansion body 10 is set to be conical, the side surface of the conical expansion body 10 is set to be an expansion body conical surface 11, one end surface of the conical expansion body 10 is set to be an expansion body top surface, the other end is set to be an expansion body bottom surface 13, the area of the expansion body top surface is smaller than that of the expansion body bottom surface 13, and the circumferential length of the expansion body conical surface 11 is gradually increased along the expansion body top surface to the expansion body bottom surface 13. The top surface of the expansion body is provided with a threading hole 12, a suture 20 passes through the threading hole 12, two ends of the suture 20 are respectively arranged as a first suture end surface 21 and a second suture end surface 22, the first suture end surface 21 and the second suture end surface 22 are flush, an anchor body inner hole 34 is arranged in the anchor body 30, a driver inner hole 42 is arranged in the driver 40, and the first suture end surface 21 and the second suture end surface 22 pass through the anchor body inner hole 34 and are led into the driver inner hole 42.

The conical expansion body 10 is partially arranged in the inverted tooth part 32, the top surface of the expansion body is arranged in the inverted tooth part 32 and faces to the thread part 31, the bottom surface 13 of the expansion body is arranged outside the inverted tooth part 32 and faces away from the thread part 31, and the outer diameter of the bottom surface 13 of the expansion body is larger than the inner diameter of the inverted tooth part 32; when the suture 20 is pulled, the conical expansion body 10 slides along the inside of the inverted tooth part 32 towards one end of the threaded part 31, and the inverted tooth flap is circumferentially expanded by the conical expansion body 10.

As shown in fig. 6, the driver 40 is provided with an outer hexagonal socket 41 towards one end of the anchor body 30, an outer hexagonal socket side surface 44 is provided around the outer hexagonal socket 41, and an outer hexagonal socket bottom surface 43 is provided towards one side of the anchor body 30 of the outer hexagonal socket 41; when the driver 40 is connected with the anchor body 30, the outer hexagonal interface 41 is matched with the inner hexagonal hole 35; the outer hexagonal socket bottom 43 fits against the inner hexagonal socket bottom 38 and the outer hexagonal socket side 44 fits against the inner hexagonal socket side 37. when the driver 40 is rotated, the driver 40 rotates the anchor body 30 through the outer hexagonal socket 41 engaging the inner hexagonal socket 35.

As shown in fig. 8 and 9, one side of the bone block 50 is provided with a bone block end surface 53, a bone block hole 51 is arranged in the bone block 50, the bone block hole 51 is communicated with the bone block end surface 53, the inner wall of the bone block hole 51 is provided with a bone block hole cylindrical surface 52, the anchor bolt body 30 is arranged in the bone block hole 51 through the driver 40, the anchor bolt first end surface 39 is flush with the bone block end surface 53, the tooth-inverted portion 32 is expanded by pulling the suture 20, teeth are arranged on the outer side of the tooth-inverted portion 32, and the teeth are embedded in the bone block hole cylindrical surface 52.

Example 2

Example 2 is a preferred example of example 1.

The expansion anchor comprises: anchor body 30, driver 40, tapered expansion body 10, and suture 20. The suture 20 passes through the threading hole 12 of the conical expansion body 10, and the first end surface 21 and the second end surface 22 of the suture 20 are ensured to be flush; the suture 20 is threaded through the anchor body bore 34 in the anchor body 30 and then further threaded into the driver bore 42 in the driver 40. The external hex interface 41 of driver 40 is mated with the hex socket 35 of anchor body 30, the bottom surface 38 of the hex socket 35 is flush with the bottom surface 43 of the external hex interface, and the six hex socket side surfaces 37 of the hex socket 35 are respectively engaged with the six external hex interface side surfaces 44 of the external hex interface 41.

The expanded anchor is placed into the bone block hole 51 of the bone block 50 with the cylindrical surface 52 of the bone block hole in contact with the outer diameter of the inverted tooth portion 32. When the bone end surface 53 contacts the threaded portion 31, the driver 40 drives the anchor clockwise, the threaded portion 31 threads into the bone hole 51, and when the anchor first end surface 39 is flush with the bone end surface 53, the driver 40 stops rotating and the driver 40 is removed.

The suture 20 is pulled to slide the conical expansion body 10 from the anchor second end surface 36 to the anchor first end surface 39 within the anchor body bore 34 of the anchor body 30 to expand the inverted tooth portion 32 and the teeth of the inverted tooth portion 32 are squeezed into the bone block bore cylindrical surface 52. Thereby increasing anchor holding strength.

The anchor body 30 is made of nickel-titanium alloy heat-activated material, and when the anchor body is implanted into a human body to reach a heat-activated temperature (37 ℃), the inverted tooth part 32 of the anchor body 30 automatically expands to realize expansion and increase the fixing strength. Of course, the expansion may be achieved by pulling the suture 20 to slide the conically shaped expansion body 10 from the anchor second end surface 36 to the anchor first end surface 39.

The anchor body 30 may be made of titanium alloy, PEEK material, biodegradable material, etc. which require sliding of the tapered expansion body 10 to expand the undercut portion 32.

The undercut portion 32 may be formed in the same shape as the threaded portion 31.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. An expansion anchor, comprising: a conical expansion body (10), a suture (20), an anchor body (30) and a driver (40);

the conical expansion body (10) is arranged in a port at one end of the anchor nail body (30), the driver (40) is arranged at the other end of the anchor nail body (30), and the anchor nail body (30) is driven to rotate by the driver (40);

one end of the suture (20) is connected with the conical expansion body (10), and the other end of the suture (20) extends out of the other end of the anchor nail body (30) and is guided into the driver (40);

the end of the anchor nail body (30) where the conical expansion body (10) is installed is provided with a tooth-inverted groove (33);

when the suture (20) is pulled, the conical expansion body (10) slides towards the anchor nail body (30), and the conical expansion body (10) stretches the anchor nail body (30) through the inverted tooth part groove (33).

2. The expansion anchor of claim 1, wherein: the conical expansion body (10) is arranged to be conical;

the side surface of the conical expansion body (10) is provided with an expansion body conical surface (11), one end surface of the conical expansion body (10) is provided with an expansion body top surface, and the other end is provided with an expansion body bottom surface (13);

the area of the top surface of the expansion body is smaller than that of the bottom surface (13) of the expansion body, and the circumferential perimeter of the conical surface (11) of the expansion body gradually increases along the direction of the top surface of the expansion body towards the bottom surface (13) of the expansion body.

3. The expansion anchor of claim 2, wherein: a threading hole (12) is arranged on the top surface of the expansion body;

the suture (20) passes through the threading hole (12);

two ends of the suture (20) are respectively arranged as a suture first end surface (21) and a suture second end surface (22);

the suture first end face (21) and the suture second end face (22) are flush;

an anchor body inner hole (34) is formed in the anchor body (30), and a driver inner hole (42) is formed in the driver (40);

the first suture end face (21) and the second suture end face (22) are passed through the anchor body inner bore (34) and introduced into the driver inner bore (42).

4. The expansion anchor of claim 2, wherein the anchor body (30) comprises: a threaded portion (31) and a back-teeth portion (32);

one end of the thread part (31) is connected with one end of the inverted tooth part (32);

a plurality of inverted tooth part grooves (33) are arranged on the inverted tooth part (32);

the inverted tooth part groove (33) extends along the axial direction of the inverted tooth part (32) and divides the inverted tooth part (32) into a plurality of inverted tooth petals;

each inverted tooth valve is connected with the threaded part (31), and adjacent inverted tooth valves are not connected.

5. The expansion anchor of claim 4, wherein: an end face of one end of the thread part (31) facing away from the inverted tooth part (32) is provided with an anchor first end face (39);

one end surface of the inverted tooth part (32), which is back to the threaded part (31), is provided with an anchor second end surface (36);

an inner hexagonal hole (35) is formed in one end, back to the tooth chamfering part (32), of the thread part (31);

the side of the hexagon socket (35) facing away from the first anchor end surface (39) is provided with a hexagon socket bottom surface (38), and the circumferential surface of the hexagon socket (35) is provided with a hexagon socket side surface (37).

6. The expansion anchor of claim 5, wherein: the conical expansion body (10) is partially installed in the inverted tooth part (32);

the top surface of the expansion body is arranged in the inverted tooth part (32) and faces the threaded part (31), and the bottom surface (13) of the expansion body is arranged outside the inverted tooth part (32) and faces away from the threaded part (31);

the outer diameter of the bottom surface (13) of the expansion body is larger than the inner diameter of the inverted tooth part (32);

when the suture (20) is pulled, the conical expansion body (10) slides along the inside of the inverted tooth part (32) towards one end of the threaded part (31), and the inverted tooth valve is expanded by the conical expansion body (10) along the circumferential direction.

7. The expansion anchor of claim 6, wherein: an outer hexagonal interface (41) is arranged at one end, facing the anchor nail body (30), of the driver (40);

an outer hexagonal connector side surface (44) is arranged on the periphery of the outer hexagonal connector (41), and an outer hexagonal connector bottom surface (43) is arranged on one side, facing the anchor body (30), of the outer hexagonal connector (41);

when the driver (40) is connected with the anchor nail body (30), the outer hexagonal interface (41) is matched with the inner hexagonal hole (35);

the outer hexagonal socket bottom surface (43) is attached to the inner hexagonal hole bottom surface (38), and the outer hexagonal socket side surface (44) is attached to the inner hexagonal hole side surface (37);

when the driver (40) rotates, the driver (40) drives the anchor body (30) to rotate through the outer hexagonal connector (41) matched with the inner hexagonal hole (35).

8. The expansion anchor of claim 1, wherein: the anchor body (30) is made of heat activated material.

9. A bone block, characterized by: the bone piece is expanded by the expansion anchor according to any one of claims 1-8.

10. The bone block of claim 9, wherein: one side of the bone block (50) is provided with a bone block end surface (53);

a bone block hole (51) is formed in the bone block (50), and the bone block hole (51) is communicated with the bone block end surface (53);

the inner wall of the bone block hole (51) is provided with a bone block hole cylindrical surface (52);

the anchor body (30) is placed in the bone block hole (51) through the driver (40), and the anchor first end surface (39) is flush with the bone block end surface (53);

the inverted tooth portion (32) is expanded by pulling the suture (20);

teeth are arranged on the outer side of the tooth-chamfering part (32), and the teeth are embedded in the bone block hole cylindrical surface (52).

Images