CN209808650U

CN209808650U - Humerus handle prosthesis with locking function

Info

Publication number: CN209808650U
Application number: CN201822045347.4U
Authority: CN
Inventors: 张弘; 张淞源
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-06
Filing date: 2018-12-06
Publication date: 2019-12-20
Anticipated expiration: 2028-12-06

Abstract

The utility model provides a humerus handle false body with locking function, including the main handle body, the one end of the main handle body is equipped with and connects the face and the handle awl, is equipped with a plurality of first locking holes that run through the main handle body on the main handle body, and the axial direction in at least one first locking hole is different from other first locking holes, still is equipped with the pterygoid lamina on the main handle body, is equipped with the ligament on the pterygoid lamina and adheres to the hole. After the medullary cavity of the humerus of a patient is reamed, the main handle body is placed into the medullary cavity and is installed to a proper position, the screws penetrate through the humerus and the locking holes through an external three-dimensional aiming tool, the humerus and the main handle body are fixed, and the ligament attachment holes are used for fixing ligaments. The utility model provides a humerus handle false body accessible locking screw locks the main handle body in the humerus marrow intracavity, has improved the stability after the fixed of humerus handle false body initial stage, effectively avoids the rotation of humerus handle false body and drops, has prolonged the life of humerus handle false body, is favorable to the patient to recover the shoulder joint function sooner.

Description

Humerus handle prosthesis with locking function

Technical Field

The utility model belongs to the field of medical implant prosthesis, in particular to a humerus handle prosthesis with a locking function.

Background

The shoulder joint is the most flexible joint in the body, the main function of the shoulder joint is movement, and secondly, the shoulder joint supports gravity, the joint capsule is very loose, the articular surface of the scapula glenoid is very small and shallow, and the structure enables the movement of the humeral head to have great flexibility. The shoulder joint is typically a ball and socket joint whose motion is divided into flexion, extension, abduction, adduction, supination and pronation. In the prior art, shoulder joint replacement is needed to treat diseases such as shoulder joint inflammation, humeral head necrosis, tumor, fracture and the like. The existing shoulder joint prosthesis mainly comprises a humerus head and a humerus handle, wherein the fixation of the humerus handle is realized by integrating bone tissues and a rough structure on the surface of a reinforced handle body. However, the time required for the biological fixation to be effective for osseointegration is a long-term mode of fixation. The primary fixation mostly belongs to mechanical fixation, namely, the structure of the humerus prosthesis and bone are utilized to form temporary fixation, the primary fixation effect directly influences the long-term fixation effect, the stability after fixation is poor due to the irregular shape of a medullary cavity, the contact surface of a humerus handle and the medullary cavity is limited, and the humerus handle is easy to fall off when a patient uses an affected limb to extract heavy objects after operation, so that the patient needs to perform the operation again, and the inconvenience and the extra economic burden in life are caused to the patient.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a humerus handle prosthesis with a locking function.

The utility model discloses specific technical scheme as follows:

the utility model provides a humerus handle false body with locking function, including the main handle body, the one end of the main handle body is equipped with and squeezes into the face, the one side of squeezing into the face is equipped with the orientation the connection face of main handle body direction slope, be equipped with the handle awl on connecting the face perpendicularly, be equipped with a plurality of first locking holes, every along length direction on the main handle body first locking hole all runs through the main handle body, at least one the axial direction in first locking hole is different from other first locking hole, be equipped with on the main handle body the one end lateral wall of connecting the face is followed main handle body length direction is equipped with the pterygoid lamina, be equipped with a plurality of ligament attachment holes along length direction on the pterygoid lamina.

Optionally, the side wall of one end of the main handle body, which is provided with the connecting surface, is provided with a plurality of rows of threaded holes along the length direction, the wing plate is provided with a plurality of stepped holes corresponding to the threaded holes in each row, the stepped holes and the ligament attachment holes are arranged in a staggered manner, screws are arranged in the stepped holes, and the screws are in threaded connection with the threaded holes to fix the wing plate on the main handle body.

Optionally, one end of the wing plate, which is far away from the main handle body, is provided with a plurality of second locking holes, and the second locking holes, the ligament attachment holes and the stepped holes are staggered.

Optionally, the number of rows of the threaded holes is 3, and the number of the threaded holes in each row is 2-3.

Optionally, a driving hole along the length direction of the main handle body is formed in the driving surface, and an internal thread is formed in the driving hole.

Optionally, the number of ligament attachment hole is 2 ~ 5, the diameter of ligament attachment hole is 3 ~ 5 millimeters.

Optionally, the number of the first locking holes is 3-5

Optionally, an angle between the connecting surface and the main handle body in the length direction is 50-70 degrees.

Optionally, a fillet is arranged at the tail part of the main handle body, which is far away from the connecting surface.

The utility model has the advantages as follows: the utility model provides a humerus handle prosthesis with locking function, when impaired needs of patient shoulder installation shoulder joint prosthesis, can expand the marrow back in patient's humerus medullary cavity, put into the medullary cavity with the main handle body, after the main handle body is installed to suitable position, through external three-dimensional sighting device or dedicated sight, pass the first locking hole on humerus and the main handle body with locking screw, fix the humerus with the main handle body. The stem awl is used to attach a humeral head prosthesis. The axial direction of at least one first locking hole is different from that of other first locking holes, so that the fixing effect of the humerus and the main handle body in different directions can be further enhanced. The ligament attachment hole is used for fixing the ligament so as to ensure the normal movement of the shoulder of the patient. The utility model provides a humerus handle false body accessible locking screw with humerus handle false body locking in the humerus marrow intracavity, improved the stability after humerus handle false body initial stage is fixed, can effectively avoid the rotation of postoperative humerus handle false body and drop, prolonged the life of humerus handle false body, be favorable to the patient to resume shoulder joint function sooner.

Drawings

Fig. 1 is a schematic structural view of a humeral stem prosthesis with a locking function according to example 1;

fig. 2 is a schematic structural view of a humeral stem prosthesis with a locking function according to example 2;

FIG. 3 is an enlarged view of A in FIG. 2;

fig. 4 is a schematic structural view of a humeral stem prosthesis with a locking function according to example 3.

Wherein: 1. a main handle body; 2. a connecting surface; 3. a handle cone; 4. a first locking hole; 5. a wing plate; 6. ligament attachment holes; 7. a threaded hole; 8. a stepped hole; 9. a screw; 10. a second locking hole; 11. punching a hole; 12. round corners; 13. and (5) striking into the surface.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings.

Example 1

As shown in fig. 1, the embodiment 1 of the present invention provides a humerus stem prosthesis with a locking function, including a main handle body 1, one end of the main handle body 1 is equipped with a driving surface 13, one side of the driving surface 13 is equipped with a connecting surface 2 inclined towards the main handle body 1, a handle cone 3 is vertically arranged on the connecting surface 2, a plurality of first locking holes 4 are arranged on the main handle body 1 along the length direction, each first locking hole 4 all runs through the main handle body 1, the axial direction of at least one first locking hole 4 is different from other first locking holes 4, one end side wall of the connecting surface 2 on the main handle body 1 is equipped with a wing plate 5 along the main handle body 1 along the length direction, and a plurality of ligament attachment holes 6 are arranged on the wing plate 5 along the length direction.

In this embodiment 1, after reaming the medullary cavity of the humerus of a patient, the main stem 1 is inserted into the medullary cavity, and after the main stem 1 is inserted to a proper position, a locking screw is simultaneously inserted through the humerus and the first locking hole 4 and fixed by an external three-dimensional aiming tool or a dedicated aiming tool, so as to lock the positional relationship between the humerus and the main stem 1, the stem awl 3 is used to connect a humeral head prosthesis, and the ligament attachment hole 6 is used to fix a ligament. The axial direction of at least one first locking hole 4 is different from the other first locking holes 4, which enhances fixation between the humerus and the main stem 1 in different directions. The humerus handle prosthesis provided by the embodiment 1 locks the humerus handle prosthesis in a humerus marrow cavity through the locking screw, so that the stability of the humerus handle prosthesis after initial fixing is improved, the rotation and falling off of the humerus handle prosthesis after operation can be effectively avoided, the service life of the humerus handle prosthesis is prolonged, and the humerus handle prosthesis is beneficial for a patient to recover the shoulder joint function more quickly.

Preferably, the angle between the axial directions of at least two adjacent first locking holes 3 is 90 °.

Preferably, the international 12/14 taper of the stem taper 3 on the humeral stem is compatible with conventional humeral head prostheses.

Preferably, the humerus handle body is provided with titanium spraying, titanium sintering, HA spraying or a trabecular bone structure, the humerus handle prosthesis needs to be placed in a patient body for a long time, and the structures arranged on the humerus handle body are beneficial to bone growth and can accelerate the recovery speed of the patient body.

Example 2

As shown in fig. 2 to 3, the present embodiment 2 provides a humeral stem prosthesis with a locking function based on embodiment 1, and further, the embodiment 2 defines that the side wall of one end of the main stem body 1, which is provided with the connection surface 2, is provided with a plurality of rows of threaded holes 7 along the length direction, the wing plate 5 is provided with a plurality of stepped holes 8 corresponding to each row of threaded holes 7, the stepped holes 8 are staggered with the ligament attachment holes 6, the stepped holes 8 are provided with screws 9, and the screws 9 fix the wing plate 5 on the main stem body 1 by being in threaded connection with the threaded holes 7. The wing plate 5 is provided with a plurality of second locking holes 10 at one end far away from the main handle body 1, and the second locking holes 10 are staggered with the ligament attaching holes 6 and the stepped holes 8. The number of rows of the threaded holes 7 is 3, and the number of the threaded holes 7 in each row is 2-3.

When the patient suffers from shoulder damage, the ligament and humerus may be damaged to different degrees, and when the humerus handle is installed, the ligament needs to be fixed, and a part of the humerus also needs to be cut off to fix the main handle body 1, and due to the different damage degrees of the ligament, the ligament may not be accurately fixed on the ligament attachment hole 6 because the distance between the ligament and the wing plate 5 is not enough or too long. In this embodiment 2, the main handle body 1 is provided with a plurality of rows of threaded holes 7, which facilitates the detachment and installation of the wing plate 5, and the wing plate 5 can be installed at a proper position according to the specific conditions of ligaments and humerus during the operation; the wing plate 5 is provided with a second locking hole 10, and after the main stem 1 is completely mounted, a screw can be inserted through the humerus and fixed in the second locking hole 10, thereby further fixing the humerus to the main stem 1 and preventing the main stem 1 from rotating.

Preferably, the number of the rows of the threaded holes 7 is 3, the wing plates 5 can be selectively installed at 3 different positions, and only 2-3 screws are needed to fix the wing plates 5.

Example 3

As shown in fig. 3, the present embodiment 3 provides a humeral stem prosthesis with a locking function based on embodiment 1, and further, embodiment 3 defines that a driving hole 11 is formed on a driving surface 13 along the length direction of the main stem body 1, and the driving hole 11 is provided with an internal thread. The quantity of ligament attachment hole 6 is 2 ~ 5, and the diameter of ligament attachment hole 6 is 3 ~ 5 millimeters. The number of the first locking holes 4 is 3-5. The angle between the connecting surface 2 and the main handle body 1 in the length direction is 50-70 degrees. The tail part of the main handle body 1 far away from the connecting surface 2 is provided with a fillet 12.

When the humerus stem prosthesis is installed, a tool such as a hammer is used for knocking the end of the main stem body 1 to enable the main stem body 1 to enter the medullary cavity, the main stem body 1 also needs to be taken out in time when the main stem body 1 is installed and deviated, and the main stem body 1 can be damaged if the hammer is used for directly knocking the main stem body 1. In this embodiment 3, a driving hole 6 is formed in one end of the main handle body 1, and an intermediate shaft is installed in the driving hole 6, so that the hammer directly strikes the intermediate shaft, the main handle body 1 enters the medullary cavity, and the hammer is prevented from directly striking the main handle body 1 to damage the main handle body. The intermediate shaft is connected with the main handle body 1 through the drilling hole 6, and when the main handle body 1 needs to be taken out, the intermediate shaft can be also taken out.

The fillet 7 is arranged at the tail part of the main handle body 1, when the main handle body 1 is placed in the marrow cavity of the humerus, the fillet 12 can prevent the tail part of the main handle body 1 from colliding with the side wall of the marrow cavity, reduce the damage to the marrow cavity and avoid the discomfort of the body of a patient. The tail of the main handle body 1 is designed in a bionic manner according to the medullary cavity of the humerus, when the main handle body 1 is placed into the medullary cavity of the humerus, the outer wall of the main handle body 1 can be fully jointed with the cavity of the medullary cavity, the fixing effect between the main handle body 1 and the medullary cavity of the humerus is enhanced, and the long-term implantation of the main handle body 1 is facilitated.

Preferably, the number of the ligament attachment holes 6 is 2-5, and the diameter of the ligament attachment holes 6 is 3-5 mm.

Preferably, the number of the first locking holes 4 is 3 to 5. In the operation process, the number of the proper locking screws can be selected according to the degree of shoulder injury of a patient and the specific condition of the operation, so that the humerus of the patient is prevented from being damaged too much while the fixing effect is achieved.

Preferably, the angle between the connecting surface 2 and the main shank 1 in the axial direction is 50-70 °.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims

1. A humerus stem prosthesis with a locking function, which is characterized by comprising a main stem body (1), one end of the main handle body (1) is provided with a driving surface (13), one side of the driving surface (13) is provided with a connecting surface (2) which inclines towards the main handle body (1), a handle cone (3) is vertically arranged on the connecting surface (2), a plurality of first locking holes (4) are arranged on the main handle body (1) along the length direction, each first locking hole (4) penetrates through the main handle body (1), the axial direction of at least one first locking hole (4) is different from that of other first locking holes (4), a wing plate (5) is arranged on the side wall of one end of the main handle body (1) on which the connecting surface (2) is arranged along the length direction of the main handle body (1), the wing plate (5) is provided with a plurality of ligament attachment holes (6) along the length direction.

2. The humeral stem prosthesis with locking function according to claim 1, wherein the main stem body (1) has a plurality of rows of threaded holes (7) formed in a side wall of one end thereof where the joint face (2) is formed, and the wing plate (5) has a plurality of stepped holes (8) corresponding to each row of the threaded holes (7), the stepped holes (8) are staggered with the ligament attachment holes (6), and screws (9) are provided in the stepped holes (8), and the screws (9) fix the wing plate (5) to the main stem body (1) by being threadedly coupled with the threaded holes (7).

3. The humeral stem prosthesis with locking function according to claim 2, characterized in that the wing plate (5) is provided with a plurality of second locking holes (10) at an end away from the main stem body (1), the second locking holes (10) being staggered with the ligament attachment holes (6) and the stepped holes (8).

4. The humeral stem prosthesis with locking function according to claim 3, characterized in that the number of rows of the threaded holes (7) is 3, and the number of the threaded holes (7) in each row is 2 to 3.

5. The humeral stem prosthesis with locking function according to claim 1, characterized in that the driving surface (13) is provided with a driving hole (11) along the length direction of the main stem body (1), and the driving hole (11) is provided with an internal thread.

6. The humeral stem prosthesis with locking function according to claim 1, wherein the number of the ligament attachment holes (6) is 2 to 5, and the diameter of the ligament attachment holes (6) is 3 to 5 mm.

7. The humeral stem prosthesis with locking function according to claim 1, characterized in that the number of the first locking holes (4) is 3 to 5.

8. The humeral stem prosthesis with locking function according to claim 1, characterized in that the angle between the joint surface (2) and the length direction of the main stem body (1) is 50 to 70 °.

9. The humeral stem prosthesis with locking function according to claim 1, characterized in that the tail of the main stem body (1) away from the joint face (2) is provided with a rounded corner (12).