Source: https://patents.google.com/patent/US6340370B1/en
Timestamp: 2018-12-09 20:55:03
Document Index: 218905462

Matched Legal Cases: ['art 3', 'art 5', 'art 5', 'art 5', 'art 2', 'art 5', 'art 2', 'art 5', 'art 5', 'art 5', 'art 5', 'art 3', 'arts 2', 'arts 2', 'art 3', 'art 2', 'art 2', 'art 3', 'art 2', 'art 2', 'art 2', 'art 2', 'arts 3', 'art 2', 'art 2', 'art 3', 'art 2', 'art 3', 'art 3', 'art 2']

US6340370B1 - Modular set of an outer shell for an artificial hip joint cup - Google Patents
Modular set of an outer shell for an artificial hip joint cup Download PDF
US6340370B1
US6340370B1 US09507488 US50748800A US6340370B1 US 6340370 B1 US6340370 B1 US 6340370B1 US 09507488 US09507488 US 09507488 US 50748800 A US50748800 A US 50748800A US 6340370 B1 US6340370 B1 US 6340370B1
US09507488
FIG. 2 shows a further exemplary embodiment of an outer shell 1 with anchoring aids 7 and screws 6. Identical reference numerals designate the same objects as were already described in FIG. 1. Projecting cams 2 c are arranged at the end surface 2 a in addition to the bores 2 b. The securing part 3 a of the lug 3 has in addition to the apertures 3 b which are provided for the screws 6 two bores 3 g which are arranged in such a manner that they each surround a cam 2 c when the lug 3 lies on the end surface 2 a. The cams 2 c serve on the one hand as an aid for the correct positioning of the lug 3 during the lying in contact on the end surface 2 a. In addition the cams 2 c serve for taking up the thrust tensions which are caused by the lug 3. A further embodiment of an anchoring aid 7 is executed as a spike 5 which consists of a securing part 5 a and a spike part 5 c. The securing part 5 a has two apertures 5 b, through each of which a screw 6 can be passed for the securing at the shell-shaped outer part 2. The securing part 5 a also has an aperture 5 d which is intended for the reception of the cam 2 c. Two projecting cams 2 c are arranged at the end surface 2 a lying opposite to the spike 5, with the spike being connectable to the shell-shaped outer part 2 in a manner which is selectable such that one of the cams 2 c comes to lie in the aperture 5 d. The spike part 5 c is centeredly arranged with respect to the two apertures 5 b. The spike part 5 c could also extend asymmetrically, overhanging to the one side with respect to the securing part 5 a. This asymmetrical spike 5 can be designed in such a manner that it can be secured in two different positions at the end surface 2 a, namely rotated by in each case 180 degrees about the axis of the spike part 5 c.
The cam can also be arranged projectingly at the securing part 3 a, 4 a, 5 a, with it being required to provide a corresponding cut-out in the end surface 2 a for the reception of the cam.
The modular set in accordance with the invention preferably comprises a plurality of shell-shaped outer parts 2 of different sizes or, respectively, also differently shaped outer parts 2, for example with round or ovally extending end surfaces 2 a. In addition the modular set comprises a plurality of differently shaped anchoring aids 7, which all have a securing part 3 a, 4 a, 5 a in order to connect the anchoring aid 7 firmly to the shell-shaped outer part 2 at the end surface 2 a. The anchoring aids 7 can for example have tongues of different length or be differently shaped anatomically. In addition the anchoring aids 7 can also be designed for an outer shell 1 which is to be implanted on the left or on the right. Preferably screws 6, but also other means which effect a connection, are suitable for a connection. The end surface 2 a could also have a different shape and, as is for example illustrated in FIG. 3 with a piece cut out of a radial section through the outer part 2, have a semicircular shape. The securing part 3 a, 4 a, 5 a would naturally have to have a counter-surface which extends in a manner which is matched to the shape of the end surface 2 a.
During the implanting of the outer shell 1 the surgeon can assemble the suitable components in accordance with the state of the pelvic bone. First a suitable shell-shaped outer part 2 is selected and, if required, the pelvic bone is prepared in such a manner that the shell-shaped outer part 2 can be arranged in the anatomically correct position in the pelvic bone. Thereupon those anchoring aids 7 are selected from the large number of available anchoring aids 7 which ensure a reliable anchoring of the shell-shaped outer part 2 in the pelvic bone. At least one of the anchoring aids 7 illustrated in FIGS. 1 and 2 is used, preferably however two. The lug 3 has an anatomically pre-shaped extent. The surgeon, for example when the outer part 2 is inserted in the pelvic bone, lays the lug 3 in contact at the end surface 2 a and checks whether the shape of the lug parts 3 d, 3 e approximately agrees with the anatomical shape of the pelvic bone. If the deviation is too great the lug 3 is removed again and reshaped outside the body with the help of a tool. The lug 3 is again laid in contact at the end surface 2 a and either firmly connected to the outer part 2 with screws 6 or removed again and reshaped. An advantage of the projecting cams 2 c is to be seen in that during this adaptation the lug 3 latches into the cams 2 c and thus the mutual position of the lug 3 and the end surface 2 a is precisely defined. It can also prove advantageous to use additional aids. Instead of the cams 2 c, which are firmly connected to the outer part 2 c, for example releasable cams or a short bar could also be screwed into the bore 2 b of the end surface 2 a, with the bores 3 b of the securing part 3 a being introduced in these cams or this bar respectively so that the lug 3 is reliably guided with respect to the end surface 2 a or the outer part 2 respectively. After the lug 3 is secured with a screw 6 the cam or the bar respectively can be removed and a screw 6 likewise introduced at this location.
The anchoring aid 7 can also be designed as a hook which has a securing part 3 a, 4 a, 5 a.
The apertures 3 b, 4 b, 5 b of the securing part 3 a, 4 a, 5 a could be also designed to be elongately extending in the direction of the course of the end surface 2 a in order to enable a slight relative movement between the outer part 2 and the anchoring aid 7 in the direction of the course of the end surface 2 awhen the screw 6 is inserted into the bore 2 b. This relative movement is subsequently prevented through a firm tightening of the screw 6.
1. A modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7), comprising:
an oval elongate hemispheric shell (2) having a larger hemispheric dimension at elongate ends in a preferred direction;
a frontal surface (2 a) defined in an equatorial plane of the oval elongate hemispheric shell (2);
threaded bores (2 b) provided in the frontal surface (2 a);
one or more screws (6) for engaging the threaded bores (2 b);
snap parts (2 f) arranged in corresponding recesses provided in the frontal surface (2 a), the snap parts (2 f) being placed proximate to one of the elongate ends of the oval elongate hemispheric shell (2);
one or more anchoring parts (7) which are selected from the group consisting of a lug (3, 4), a spike (5) and a hook;
each anchoring part (7) having a securing part (3 a, 4 a, 5 a) designed to match the frontal surface (2 a);
bores (3 b, 4 b, 5 b) defined by the securing parts (3 a, 4 a, 5 a), the bores (3 b, 4 b, 5 b) corresponding to threaded bores (2 b) provided in the frontal surface (2 a) in such a manner that the securing part (3 a, 4 a, 5 a) can be secured at the oval elongate hemispheric shell (2) by means of the one or more screws (6) which engage in the bore (2 b); and,
at least one anchoring part (7) being designed and arranged in such a manner that its securing part (3 a, 4 a, 5 a) bridges the recesses and the corresponding snap parts (2 f).
2. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 1 and wherein: the frontal surface (2 a) has a planar surface.
the one or more anchoring parts (7) is a lug (3, 4) consisting of a securing part (3 a, 4 a) with a tongue-shaped lug part (3 d, 3 e, 4 c).
4. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 3 and wherein:
the tongue-shaped lug part (3 d, 3 c, 4 c) is shaped substantially to conform to the anatomy of the pelvic bone.
5. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 3 and wherein:
the lug (3, 4) has at least two lug parts (3 d, 3 e) which extend substantially parallel to one another.
6. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 3 and wherein:
the lugs (3, 4) are deformable.
7. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 1 and wherein:
the frontal surface (2 a) has a projecting cam (2 c) and the securing parts (3 a, 4 a, 5 a) have a cut-out (3 g, 5 b) for the reception of the cam (2 c).
8. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 1 and wherein:
the anchoring parts (7) include titanium.
9. A modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 1 and wherein:
the oval elongate hemispheric shell (2) is provided with at least four threaded bores (2 b) provided in the frontal surface (2 a) and with three snap parts (2 f) each arranged in a recess provided in the frontal surface (2 a); and,
the anchoring part (7) has at least four screws (6) causing the securing part (3 a, 4 a, 5 a) to be secured to the oval elongate hemispheric shell (2) by means of four screws (6) which engage in the four threaded bores (2 b).
10. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 1 and wherein:
the oval elongate hemispheric shell (2) is selected from a plurality of differently sized and shaped oval elongate hemispheric shells (2).
11. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 1 and wherein:
the anchoring parts (7) are selected from a plurality of differently sized and shaped anchoring parts (7).
12. The modular set of an outer shell (1) for an artificial hip joint cup and anchoring parts (7) according to claim 1 and wherein:
US09507488 1999-03-10 2000-02-10 Modular set of an outer shell for an artificial hip joint cup Expired - Fee Related US6340370B1 (en)
EP99810210 1999-03-10
US6340370B1 true US6340370B1 (en) 2002-01-22
ID=8242723
US09507488 Expired - Fee Related US6340370B1 (en) 1999-03-10 2000-02-10 Modular set of an outer shell for an artificial hip joint cup
US (1) US6340370B1 (en)
EP (1) EP1034754A1 (en)
EP1034754A1 (en) 2000-09-13 application
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WILLERT, HANS-GEORG;BIDER, KURT;REEL/FRAME:010646/0077;SIGNING DATES FROM 19991223 TO 20000116