Jossi Holding Ag

Mathys Ag Bettlach

Maschinenfabrik Rieter Ag

Uster Technologies Ag

Armin Jossi

Andreas Meyenhofer

Christian Gugler

Jürg Faas

Martin Schmidt

Christoph SCHÖNBÄCHLER

Walter Kiechl

A shell () for a prosthetic joint to be driven into a bone substance. The shell having an outer lateral surface () which is convexly curved in cross section and on which a plurality of ribs () is arranged. All ribs extend in the same direction at a preferably increasing gradient angle of 45° to 85° at the equatorial end () to a pole-side end (). The cumulative flank projection area of all ribs () corresponds to at least a fifth of the entire outer lateral surface. As a result of this measure, a very high primary stability is achieved once the shell has been driven in, the shell being screwed into the bone substance very precisely and without bone material being sheared off. This arrangement can also be applied, similarly, to a concavely curved inner lateral surface.

Shell to be driven into a bone substance for a prosthetic joint

An artificial joint cup, in particular a hip joint cup, for implanting in a cavity in a bone. The joint cup is, in particular, substantially in the form of a spherical dome cup, having a convex outer surface and a concave inner surface. In addition, the joint cup comprises an outer diameter and an inner diameter. The ratio of the difference between the outer diameter and the inner diameter, in relation to the outer diameter, is in a range of between 0.5 and 0.07, preferably between 0.3 and 0.075, particularly preferably between 0.2 and 0.1. The joint cup is manufactured from a ceramic material, and the convex outer surface has a micro-structuring.

Artificial joint cup

The position of foreign matter in a bale pattern after its separation in a separating device (10) may be evaluated in that the relative position of the opening device (1) and the transport time of the fibers between the opening device (1) and the separating device (10) is determined in each relative position. Given a separating procedure, taking account of the mentioned variables, the position of the opening device (1) at the point in time of opening the foreign matter (28) is evaluated. The determined opening position of the foreign matter on the fiber bales (27) is stored as a signal and subsequently preferably graphically represented. The method permits conclusions on the degree of contamination of the fiber bales.

Method and device for identifying the position-related origin of foreign

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Frauenfeld, Switzerland

Armin Jossi