CN217447967U

CN217447967U - Hip bone-knitting nail

Info

Publication number: CN217447967U
Application number: CN202120527558.0U
Authority: CN
Inventors: 任绍东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2022-09-20
Anticipated expiration: 2031-03-11

Abstract

The utility model belongs to the technical field of the medical instrument technique and specifically relates to indicate a hip bone nail, including preventing soon bone nail main part and with prevent the jam plate of the one end integral type structure of revolving bone nail main part, the jam plate is obtuse angle gamma with the contained angle of preventing revolving bone nail main part, the jam plate is provided with the lockhole. The utility model has the advantages of simple structure, the simple operation, high efficiency have shortened the time of operation, have reduced the risk of operation and the secondary injury and the painful sense of bringing for the patient, have improved the security performance of operation.

Description

Hip bone-knitting nail

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a hip bone-setting nail.

Background

After the old people fall, the fracture of the hip bone is easy to happen, and when the bone is fixed in the operation, a bone screw is needed to fix the connecting position. In the existing minimally invasive surgery, one bone screw or a plurality of parallel bone screws are mostly adopted for fixation. The existing bone-knitting nail mainly comprises a main nail, an auxiliary nail and a fixing screw, wherein the main nail is firstly installed in a bone during an operation, then the auxiliary nail is installed at a bone-knitting position through a radial hole on the main nail so as to fix a fracture position, and finally the auxiliary nail is locked on the main nail through the fixing screw. The bone screw has the advantages of complex structure, complex operation and long operation time, increases the risk of operation, and is easy to cause secondary injury or pain to patients. Therefore, the drawbacks are obvious, and it is highly desirable to provide a solution.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, an object of the present invention is to provide a hip bone screw.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hip bone screw comprises a rotation-proof bone screw body and a locking plate integrally constructed with one end of the rotation-proof bone screw body, wherein an included angle between the locking plate and the rotation-proof bone screw body is an obtuse angle gamma, and the locking plate is provided with a locking hole.

Further, the obtuse angle gamma is 125-135 deg.

Furthermore, the number of the lock holes is one or more, and a plurality of lock holes are arranged along the length direction of the lock plate.

Further, the lock hole is a threaded hole.

Further, the threaded hole comprises a straight threaded hole and a tapered threaded hole which is coaxially communicated with the straight threaded hole.

Further, the central axis of the lock hole is perpendicular to or inclined with the lock plate.

Further, the central axis of the lock hole and the inner side surface of the lock plate form an included angle theta of 75 degrees.

Further, the hip bone nail further comprises a locking nail, and the locking nail is detachably connected with the locking plate through a locking hole.

Further, the tip of the lock pin is provided with a guide notch.

Furthermore, the anti-rotation bone screw main body comprises a spiral tool bit, a connecting bolt, an anti-rotation sleeve, an anti-rotation nut and a through guide hole which coaxially penetrates through the spiral tool bit and the connecting bolt, wherein a spiral body is arranged on the outer wall of the front part of the spiral tool bit, the rear part of the spiral tool bit is of a cylindrical structure, a clamping groove is formed in the tail part of the spiral tool bit, and a first toothed stripe is arranged on the rear end face of the spiral tool bit; the front part of the connecting bolt is provided with a circular raised head matched with the clamping groove, and the outer part of the rear part of the connecting bolt is provided with an external thread; the anti-rotation sleeve is of a tubular structure and is sleeved on the rear part of the spiral cutter head and the outer parts of the connecting bolt and the anti-rotation nut; the inner wall of the anti-rotation nut is provided with an internal thread connected with the external thread in a threaded mode, a second toothed stripe clamped with the first toothed stripe is arranged on the front end face of the anti-rotation nut, one end, away from the spiral body, of the anti-rotation sleeve is integrated with the locking plate, and the anti-rotation nut is exposed on the locking plate.

The utility model has the advantages that: in practical application, after the positioning needle is inserted into a position to be bonesed, the anti-rotation bone screw main body is drilled into the position to be bonesed of the hip along the positioning needle, so that the fractured hip is tightly connected together by the anti-rotation bone screw main body, the locking plate is externally arranged outside the fractured hip and is attached to the outer side of a normal bone below the hip due to the fact that the included angle between the locking plate and the anti-rotation bone screw main body is an obtuse angle gamma, the locking plate is firmly locked on the normal bone through the locking nail via the locking hole, and therefore fixing of the locking plate and the hip bone screw is achieved, and accordingly bonesetting of the fractured hip is achieved. The utility model has the advantages of simple structure, the simple operation, high efficiency have shortened the time of operation, have reduced the risk of operation and the secondary injury and the painful sense of bringing for the patient, have improved the security performance of operation.

Drawings

Fig. 1 is the schematic view of the three-dimensional structure of the utility model after the lock pin is hidden.

Fig. 2 is a schematic view of the three-dimensional structure of the locking nail of the present invention.

Fig. 3 is a cross-sectional view of the anti-rotation bone screw main body of the present invention.

Fig. 4 is a perspective schematic view of the utility model in use.

Description of reference numerals:

1. a rotation-proof bone screw body; 11. a helical cutter head; 12. a connecting bolt; 13. an anti-rotation sleeve; 14. an anti-rotation nut; 15. penetrating the guide hole; 16. a helical body; 17. a card slot; 18. a circular raised head; 2. a locking plate; 3. a lock hole; 4. locking nails; 41. a straight thread section; 42. a tapered thread segment; 5. a guide notch; 6. a hip; 7. normal bone.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 1 to 4, the present invention provides a hip bone screw, which comprises a rotation-proof bone screw main body 1 and a locking plate 2 integrally formed with one end of the rotation-proof bone screw main body 1, wherein an included angle between the locking plate 2 and the rotation-proof bone screw main body 1 is an obtuse angle γ, and the locking plate 2 is provided with a locking hole 3; in particular, the hip bone screw further comprises a locking nail 4, and the locking nail 4 is detachably connected with the locking plate 2 through the locking hole 3.

In practical application, after the positioning pin is inserted into a position to be bonesed, the anti-rotation bone screw body 1 is drilled into the position to be bonesed of the hip 6 along the positioning pin, so that the fractured hip 6 is tightly connected by the anti-rotation bone screw body 1, the locking plate 2 is externally arranged outside the fractured hip 6 and attached to the outer side of a normal bone 7 below the hip 6 because the included angle between the locking plate 2 and the anti-rotation bone screw body 1 is an obtuse angle gamma, and the locking plate 2 is firmly locked on the normal bone 7 through the locking pin 4 via the locking hole 3, so that the locking plate 2 and the hip bone screw are fixed, and the fracture of the fractured hip 6 is realized. The utility model has the advantages of simple structure, the simple operation, high efficiency have shortened the time of operation, have reduced the risk of operation and the secondary injury and the painful sense of bringing for the patient, have improved the security performance of operation.

In this embodiment, the obtuse angle γ is 125 ° to 135 °. This angle design is favorable to the mounting of jam plate 2 and normal bone 7 inseparabler to make jam plate 2 can firmly lock on normal bone 7 more, be favorable to improving the effect of operation.

In this embodiment, the number of the locking holes 3 is one or more, and the locking holes 3 are arranged along the length direction of the locking plate 2. Through a plurality of lockpins 4 respectively through a plurality of lockholes 3 with the jam plate 2 lock pay on normal bone 7, guaranteed that the jam plate 2 can firmly lock on normal bone 7.

In this embodiment, lockhole 3 is the screw hole, through lock nail 4 and screw hole threaded connection, not only is favorable to twisting into normal bone 7 with lock nail 4 in, still makes the firm in connection of lock nail 4 and jam plate 2, is difficult to the pine take off.

In this embodiment, the threaded hole includes a straight threaded hole and a tapered threaded hole coaxially communicating with the straight threaded hole. Specifically, the minimum inner diameter of the conical threaded hole is equal to and communicated with the inner diameter of the straight threaded hole; specifically, the structure of the lock nail 4 is correspondingly matched with the structure of the threaded hole, the lock nail 4 comprises a straight threaded section 41 and a tapered threaded section 42 coaxially connected with the straight threaded section 41, the straight threaded section 41 is in threaded connection with the straight threaded hole, and the tapered threaded section 42 is in threaded connection with the tapered threaded hole. This structural design, after the locking of lock nail 4 targetting in place, the cooperation of taper thread end and taper screw hole is in order to play spacing effect, avoids lock nail 4 excessively to twist normal bone 7 and causes the damage of normal bone 7.

In this embodiment, the central axis of the locking hole 3 is perpendicular to or inclined from the locking plate 2; this structural design for the condition that lockhole 3 set up on jam plate 2 has three kinds, and the first condition is: the central axis of the lock hole 3 is vertical to the lock plate 2; the second case is: the lock hole 3 is obliquely arranged on the lock plate 2 upwards, and when the lock nail 4 is locked with the normal bone 7 through the lock hole 3, the lock nail 4 is parallel or nearly parallel to the anti-rotation bone screw main body 1; the third case is: the lockhole 3 downward sloping sets up on the jam plate 2, and the central axis of lockhole 3 is 75 with the contained angle theta of the medial surface of jam plate 2, and obtuse angle gamma is 135, and when the lock pin 4 locked with normal bone 7 through the lockhole 3, the lock pin 4 was perpendicular or nearly perpendicular with normal bone 7, was favorable to having improved the fastness that the lock pin 4 locked jam plate 2 on normal bone 7.

In this embodiment, the tip of the locking pin 4 is provided with a guide notch 5. Set up direction breach 5 through the pointed end at lock pin 4, be favorable to screwing into lock pin 4 more easily in normal bone 7, reduced the degree of difficulty of operation.

In this embodiment, the anti-rotation bone screw body 1 comprises a spiral tool bit 11, a connecting bolt 12, an anti-rotation sleeve 13, an anti-rotation nut 14 and a through guide hole 15 coaxially penetrating the spiral tool bit 11 and the connecting bolt 12, wherein a spiral body 16 is arranged on the outer wall of the front part of the spiral tool bit 11, the rear part of the spiral tool bit 11 is of a cylindrical structure, a clamping groove 17 is arranged at the tail part of the spiral tool bit 11, and a first toothed stripe is arranged on the rear end surface of the spiral tool bit 11; the front part of the connecting bolt 12 is provided with a circular raised head 18 matched with the clamping groove 17, and the outer part of the rear part of the connecting bolt 12 is provided with an external thread; the anti-rotation sleeve 13 is of a tubular structure and is sleeved on the rear part of the spiral cutter head 11 and the outer parts of the connecting bolt 12 and the anti-rotation nut 14; the inner wall of the anti-rotation nut 14 is provided with an internal thread screwed with the external thread, a second toothed stripe clamped with the first toothed stripe is arranged on the front end face of the anti-rotation nut 14, one end, far away from the spiral body 16, of the anti-rotation sleeve 13 is integrated with the locking plate 2, and the anti-rotation nut 14 is exposed on the locking plate 2. The positioning needle is positioned at the position to be boned, and then the positioning needle is matched with the through guide hole 15, so that the anti-rotation bone screw body 1 can be drilled into the fractured hip 6 along the positioning needle, the accuracy and the precision of the bone-knitting position are ensured, the screw bit 11 can rotate relative to the anti-rotation sleeve 13 and the connecting bolt 12 in the process that the anti-rotation bone screw body 1 is drilled into the fractured hip, after the anti-rotation bone screw body 1 is drilled in place, the connecting bolt 12 is screwed, so that the connecting bolt 12 drives the screw bit 11 to contract relative to the anti-rotation sleeve 13, the screw bit 11 tensions the fractured hip 6 until the first toothed stripe and the second toothed stripe are mutually abutted and clamped, and the screw bit 11 is locked to prevent the screw bit 11 from rotating.

All the technical features in the embodiment can be freely combined according to actual needs.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

Claims

1. A hip bone screw, characterized in that: the anti-rotation bone screw comprises an anti-rotation bone screw main body and a locking plate integrally constructed with one end of the anti-rotation bone screw main body, wherein an included angle between the locking plate and the anti-rotation bone screw main body is an obtuse angle gamma, and the locking plate is provided with a locking hole; the central axis of the lock hole is vertical to or inclined with the lock plate; the central axis of the lock hole and the inner side surface of the lock plate form an included angle theta of 75 degrees.

2. The hip bone screw according to claim 1, characterized in that: the obtuse angle gamma is 125-135 degrees.

3. The hip bone screw according to claim 1, characterized in that: the number of lockhole is one or more, and a plurality of lockholes set up along the length direction of jam plate.

4. The hip bone screw according to claim 1, characterized in that: the lockhole is a threaded hole.

5. The hip bone screw of claim 4, wherein: the threaded hole comprises a straight threaded hole and a conical threaded hole which is coaxially communicated with the straight threaded hole.

6. The hip bone screw according to any one of claims 1 to 5, characterized in that: the hip bone-knitting nail further comprises a locking nail, and the locking nail is detachably connected with the locking plate through the locking hole.

7. The hip bone screw according to claim 6, characterized in that: the tip of lock pin is provided with the direction breach.

8. The hip bone screw according to claim 1, characterized in that: the anti-rotation bone screw main body comprises a spiral tool bit, a connecting bolt, an anti-rotation sleeve, an anti-rotation nut and a through guide hole which coaxially penetrates through the spiral tool bit and the connecting bolt, wherein a spiral body is arranged on the outer wall of the front part of the spiral tool bit, the rear part of the spiral tool bit is of a cylindrical structure, a clamping groove is arranged at the tail part of the spiral tool bit, and a first dentate stripe is arranged on the rear end surface of the spiral tool bit; the front part of the connecting bolt is provided with a circular raised head matched with the clamping groove, and the outer part of the rear part of the connecting bolt is provided with an external thread; the anti-rotation sleeve is of a tubular structure and is sleeved on the rear part of the spiral cutter head and the outer parts of the connecting bolt and the anti-rotation nut; the inner wall of the anti-rotation nut is provided with an internal thread connected with the external thread in a threaded mode, a second toothed stripe clamped with the first toothed stripe is arranged on the front end face of the anti-rotation nut, one end, away from the spiral body, of the anti-rotation sleeve is integrated with the locking plate, and the anti-rotation nut is exposed on the locking plate.