CN213190330U

CN213190330U - Rotatable disassembly dislocation prevention structure of artificial total hip joint acetabular liner

Info

Publication number: CN213190330U
Application number: CN202021457372.4U
Authority: CN
Inventors: 韩永台; 刘勃; 吴涛; 马文辉; 刘思凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-05-14
Anticipated expiration: 2030-07-22

Abstract

A rotatable disassembly dislocation prevention structure of an artificial total hip joint acetabular liner belongs to the technical field of orthopedic surgery instruments and is used for preventing dislocation of a hip joint. The technical scheme is as follows: install the annular protective shroud on the opening circumference terminal surface of acetabular bone inside lining, there are a plurality of slots on the opening circumference terminal surface of acetabular bone inside lining, and a plurality of slots are along the opening circumference terminal surface equipartition of acetabular bone inside lining, and it is relative with the slot respectively that have a plurality of archs on the plane of annular protective shroud, and the annular protective shroud passes through protruding and slot to be connected with the opening circumference terminal surface cooperation of acetabular bone inside lining, and the thickness of annular protective shroud increases from one end to relative other end gradually. The utility model has the advantages of being simple in structure and convenient in operation, respond well, the annular protective shroud has increased the height of acetabular bone inside lining opening terminal surface, can prevent that the thighbone bulb from taking place to dislocate, can select the user state according to patient's hip joint form, can prevent the emergence that postoperative patient hip joint dislocated after the use, has guaranteed the curative effect of operation, has improved patient's quality of life.

Description

Rotatable disassembly dislocation prevention structure of artificial total hip joint acetabular liner

Technical Field

The utility model relates to a detachable and anti-dislocation acetabulum lining used in an artificial total hip joint replacement operation, which belongs to the technical field of orthopedic surgical instruments.

Background

The artificial total hip joint replacement is a common orthopedic operation and can be widely used for treating hip joint end-stage diseases such as femoral head necrosis, hip joint dysplasia, femoral neck fracture, tumors around hip joints and the like. The artificial total hip replacement is divided into primary total hip replacement and revision after hip replacement.

The artificial total hip replacement needs to implant an artificial joint prosthesis into a patient, and the prosthesis should maintain the inherent position after being implanted, so that the prosthesis is not easy to loosen and dislocate. In addition, the limb length of the patient after operation needs to be recovered to be equal, and the hip joint rotation center is recovered to the anatomical position, so that the patient can walk like a normal person after operation, and complications such as lameness, pain and the like are not easy to occur.

The prior artificial total hip joint prosthesis generally comprises four parts, namely an acetabulum outer cup (or called an acetabulum cup), an acetabulum inner liner (or called an inner liner), a femoral ball head (or called a ball head) and a femoral stem. Some artificial total hip joint prostheses are designed by screws or blocking nuts at the parts of the acetabulum outer cup and the femoral stem; the artificial total hip joint prosthesis is provided with a clamp spring, taper locking, a back high edge and the like at the parts of the acetabulum inner lining and the acetabulum outer cup.

Due to the difference of the sizes of the human body structures, all the artificial total hip joint prostheses have different sizes and models so as to adapt to people with different heights and weights. For example, the diameter of the acetabulum lining of the common artificial total hip joint is 44mm-56mm, and the like. For different patients, the hip joint dislocation is often caused after the operation due to the influence of the position, the angle or the muscle strength of the mortar cup, so that the curative effect of the operation and the life quality of the patients are reduced to a certain extent. Therefore, how to prevent the dislocation of hip joint after operation becomes a problem to be urgently solved in clinic.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a rotatable dismantlement anticreep position structure of artifical total hip joint acetabular bone inside lining is provided, this kind of can dismantle anticreep position structure can select the user state according to the patient condition, can effectively prevent the emergence that postoperative patient hip joint dislocated after the use to guarantee the curative effect of operation, improve patient's quality of life.

The technical scheme for solving the technical problems is as follows:

the utility model provides a rotatable dismantlement anticreep position structure of artifical full hip joint acetabular lining, it includes the acetabular lining, install annular protective shroud on the opening circumference terminal surface of acetabular lining, there are a plurality of slots on the opening circumference terminal surface of acetabular lining, a plurality of slots are along the opening circumference terminal surface equipartition of acetabular lining, it is relative with the slot respectively that there are a plurality of archs on the plane of annular protective shroud, annular protective shroud passes through protruding and slot and is connected and the toper locking with the opening circumference terminal surface cooperation of acetabular lining, the thickness of annular protective shroud increases from one end to the other end that is relative gradually.

The rotatable disassembly anti-dislocation structure of the artificial full hip joint acetabular liner is characterized in that a plurality of slots on the circumferential end face of an opening of the acetabular liner are circular grooves, adjacent slots are spaced at intervals of 30 degrees on the circumference of the end face, protrusions of the annular guard ring are cylinders, the diameter and the length of each cylinder are matched with the diameter and the depth of each circular groove, and the included angle between planes on two sides of the annular guard ring is 8-12 degrees.

The utility model has the advantages that:

the utility model adds the annular guard ring on the opening circumference end surface of the acetabulum lining, and the annular guard ring increases the height of the opening end surface of the acetabulum lining, thereby preventing the femoral head from dislocation; the annular retainer is detachably connected with the acetabular liner, and whether the annular retainer is used or not can be selected in the operation; the annular guard ring is inserted by a plurality of equidistant circular grooves and cylindrical bulges, and the positions of different heights of the annular guard ring can be adjusted according to the hip joint shape of a patient, so that the optimal operation effect is achieved.

The utility model has the advantages of being simple in structure and convenient in operation, respond well, can select the user state according to the patient condition, can prevent the emergence of postoperative patient hip joint dislocation after the use, guaranteed the curative effect of operation, improved patient's quality of life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic cross-sectional view of an acetabular liner;

FIG. 4 is a schematic view of the structure of the annular retainer

FIG. 5 is a cross-sectional view of FIG. 4

Fig. 6 is a sectional shape of the slot and the projection.

The figures are labeled as follows: the acetabulum cup comprises an acetabulum outer cup 1, an acetabulum inner liner 2, an annular retainer 3, a slot 4 and a protrusion 5.

Detailed Description

The utility model discloses constitute by acetabular bone inside lining 2 and annular protective shroud 3.

The body of the acetabulum liner 2 is made of ultra-high molecular weight polyethylene material with ultra-wear resistance and high crosslinking performance.

The figure shows that the utility model discloses increased annular protective shroud 3 on the opening circumference terminal surface of acetabular bone inside lining 2, annular protective shroud 3's effect has increaseed the height of acetabular bone inside lining 2's opening circumference terminal surface, has increased the dislocation radius of bulb for the thighbone bulb is difficult to take place the dislocation, with the effect of guaranteeing artifical hip joint replacement operation.

The acetabular liner 2 and annular retainer 3 are shown connected in a bayonet-type arrangement. A plurality of slots 4 are arranged on the opening circumferential end surface of the acetabulum lining 2, and the slots 4 are uniformly distributed along the opening circumferential end surface of the acetabulum lining 2. Correspondingly, a plurality of protrusions 5 are arranged on the plane of the annular retainer 3 and are respectively opposite to the slots 4, and the annular retainer 3 is connected with the opening circumferential end face of the acetabulum lining 2 in a matching way through the protrusions 5 and the slots 4.

The figure shows that a plurality of slots 4 on the circumferential end face of the opening of the acetabular liner 2 are circular grooves, the adjacent circular grooves are spaced by 30 degrees on the circumference of the end face, the protrusions 5 of the annular retainer 3 are cylinders, the diameter and the length of the cylinders are matched with the diameter and the depth of the circumferential grooves, and the protrusions 5 are inserted into the slots 4 to be tightly matched.

The thickness of the annular retainer 3 is shown to increase from one end to the opposite end, with the angle between the two side planes of the annular retainer 3 being 8-12 °. The adoption of the structure considers that the conditions of various patients are different, the requirements of the heights of various points on the end surface of the acetabular liner 2 need to be increased are different, and the doctors can select the positions with different heights of the annular retainer 3 according to the individual conditions of the patients so as to achieve the best operation effect.

Meanwhile, the slots 4 on the acetabular liner 2 and the protrusions 5 on the annular retainer 3 are arranged at equal intervals, and the annular retainer 3 is rotated to be connected with the acetabular liner 2 at different positions without obstacles, so that the annular retainer 3 can be rotated within a range of 360 degrees, and doctors can rotate the annular retainer 3 in the axial direction besides rotating the annular retainers 3 at different heights so as to adapt to individual conditions of patients.

The socket 4 of the acetabular liner 2 and the protrusion 5 of the annular retainer 3 are shown to be tapered, with the diameter of the tapered bottom surface of the socket 4 being smaller than the diameter of the socket and the diameter of the tapered top surface of the protrusion 5 being smaller than the diameter of the bottom.

The utility model discloses an embodiment as follows:

the diameter of the acetabulum liner 2 is 46mm, 12 slots 4 are arranged, the diameter of each slot 4 is 1mm, the depth of each slot 4 is 1mm, and the circumference interval of adjacent slots 4 is 30 degrees;

the diameter of annular protective ring 3 is 46mm, has 12 projections 5, and the diameter of projection 5 is 1mm, and the degree of depth is the circumference interval 30 of adjacent projection 5 of 1mm, and the contained angle between the plane of both sides of annular protective ring 3 is 10.

Claims

1. The utility model provides a rotatable dismantlement anticreep position structure of artifical full hip joint acetabular bone inside lining, it includes acetabular bone inside lining (2), its characterized in that: install annular protective shroud (3) on the opening circumference terminal surface of acetabular bone inside lining (2), there are a plurality of slots (4) on the opening circumference terminal surface of acetabular bone inside lining (2), a plurality of slots (4) are along the opening circumference terminal surface equipartition of acetabular bone inside lining (2), it is relative with slot (4) respectively to have a plurality of archs (5) on the plane of annular protective shroud (3), annular protective shroud (3) are connected through the cooperation of the opening circumference terminal surface of protruding (5) and slot (4) with acetabular bone inside lining (2), the thickness of annular protective shroud (3) is from one end to relative other end crescent.

2. The rotatable disassembly anti-dislocation structure of the acetabular liner of the artificial total hip joint of claim 1, wherein: a plurality of slots (4) on the opening circumference end face of the acetabulum lining (2) are circular grooves, the interval between adjacent slots (4) is 30 degrees on the circumference of the end face, the bulge (5) of the annular guard ring (3) is a cylinder, the diameter and the length of the cylinder are matched with the diameter and the depth of the circumferential groove, and the included angle between the planes of the two sides of the annular guard ring (3) is 8-12 degrees.