RU1214U1 - Hip Endoprosthesis - Google Patents

Abstract

An endoprosthesis of a hip joint containing a cup with fixation ribs, a head, a neck with a support plate and a leg, characterized in that it has an annular groove for the locking ring with a groove for its removal, a conical leg with grooves and longitudinal grooves with a conical end and a threaded shank for an additional segment having a corresponding coaxial channel.

Description

HIP JOINT ENDOPROTHESIS of the system of O.A. Barshak and S.P. Gordevva

The invention relates to the field of medicine, namely to traumatology and orthopedics and can be used in joint arthroplasty

Known denture containing cup, goyaevka, neck and noso-su / cm, Hanpm / iep, application No. b gCBE / S, according to which the floor; a strong ruling.

This endoprotvs is taken as a prototype.

However, the fixation of the head in the cup of this endoprosthesis is made in the form of a threaded washer, which complicates the joint process and requires additional means of locking the washer / embossing or locknut /. In addition, the leg of the endoprosthesis is not the fixation elements from the longitudinally-rotational displacements, but the length is constant.

Known denture containing a head, a washer and a leg / cm, for example,. Yumashev Traumatology and Orthopedics, M, Medicine, 1983, St 79, Rice,.

However, this endoprosthesis is applicable in cases where the swivel: naya hollow is full, t. he has no cup.

The purpose of the invention is to increase the ease of folding, the reliability of the joint and the strength of the fixation of the legs in the bone marrow canal of the femur with the possibility of its lengthening.

This goal is achieved by the fact that the head in the cup is fixed with a threadless spring element, the leg is equipped with elements preventing its longitudinal-rotational displacement., And its dimensions can vary.

The essence of the invention lies in the fact that the head retainer in the cup is made in the form of a split spring ring, the leg is provided with grooves and ribs, and an additional spring segment can be screwed onto its end.

In Fig. I, an endoprosthesis is shown on the side /.

In FIG. 2 shows the cup / view si h h

In FIG. 3 the same / bottom view /. . ,.

Fig. 4 shows a shut-off,

M. kp, A6IBI7 / 58

 FAQ # fejLjitt-. -

Cup I is equipped with a hemispherical cavity, the center of which lies lower than the cut of its end and is located on the plane of the bottom of the annular groove 9, into which above the head 4 the preliminary locking ring 10 is cut with a cut II. The groove 9 has an annular flange 12, the diameter of which is less than a diameter of 1.4 meters of the uncompressed ring 10, so that it does not fall out of the groove 9 and holds the head 4 out of the cavity of Cup I from dislocation. Near the groove 9, intersecting it, there is a groove 13, which is for the entry of the hook / not shown / under the ring 10 to remove it if necessary, dismemberment of the endoprosthesis.

The base plate 7 has a through threaded hole 14 for the screw 15, which serves for fastening to the bone.

The axis of the neck 6 and legs 8 lie in the same plane, but in this:; all planes are shifted from each other by an amount.

But :: -: ka 8 is conical and equipped with longitudinal / LT kanazkat.-P1 16 and 17 and holes 18 and 19 to prevent rotational and longitudinal displacements

Leg 8 ends with a mating cone 30 with a thread. with a shank 31, onto which the threaded channel ZY is screwed on an additional segment 23 of the leg 8 for the purpose of its D-repair if necessary.

The endoprosthesis is installed as follows.

The pathological hip joint is opened and the head is dislocated from the articular cavity. The articular end of the femur is cut off, the bone marrow canal is drilled under leg 8 and drilled from the acetabulum under Cup I.

The acetabulum is filled with cement and the cup 1 is fixed in it. In this case, the ring 10 is inserted into the neck 6 through the leg 8 and the leg 8 is inserted into the bone-marrow canal of the femur cemented with cement so that the base plate 7 rests on the sawdust of the articular end, the position of the neck b is corrected and heads 4 and fix the bones of vintogl 15.

They drive the head 4 into the cup I and fix their docking by locking the ring 10 by inserting it in a pressed state into the groove 9.

If necessary, due to the structure of the bone or its pathology, leg 8 can be extended by screwing an additional segment 23 on its end, which may have several lengths.

-f

head 4 in cup I with a ring 10 ..

The endoprosthesis is intended for use in orthopedic and trauma clinics in the treatment of pathology of the hip joints.

Its use allows to increase the fixation strength in the bone, to provide easy folding and, if necessary, to extend the leg when Iv {0 in the operating room.

An additional segment E4 can be attached to the end of the leg 8 by means of a collet grip / FIG. 5 /. For this, an annular groove is made on the threadless docking cone 20 under the serrated edge of the collar l® petals 27-28.

The additional segment 24 itself has an axial blind conical channel 29 in the shape of a mating cone 20. Its outer surface has a two-stage taper, and longitudinally axial grooves 31 and 32 are located on the lower taper 30. The upper taper is cut to the middle by collet lobes 27-28,

To lengthen the leg 8, the corresponding length of the segment 24 is mounted on the docking cone 20 d of the edge 26 of the petals 27-28 in the groove 25.

Claims (1)

An endoprosthesis of a hip joint containing a cup with fixation ribs, a head, a neck with a support plate and a leg, characterized in that it has an annular groove for the locking ring with a groove for its removal, a conical leg with grooves and longitudinal grooves with a conical end and a threaded shank for an additional segment having a corresponding coaxial channel.