Abstract: A meniscus prosthesis includes a core made of a first biocompatible, non-resorbable material having a first tensile modulus. The core includes an arc-shaped body having: a first end having a first through-hole; a second end having a second through-hole; a curved intermediate section connecting the first end and the second end; a first surface configured to face a first interior surface of the joint during use and a second surface configured to face a second interior surface of the joint during use, an inner edge and an outer edge. The core comprises a transverse cross-section in which the width is greater than the height along the length of the core. A cushioning material surrounds the intermediate section of the core, the cushioning material being made of a second biocompatible, non-resorbable material having a second tensile modulus, which is lower than a tensile modulus of the first material.

Abstract: The invention is directed to a meniscus prosthesis comprising an arc-shaped meniscus prosthesis body having a main portion (1) comprising a reinforcing part (2) and two end portions (1A, 1B) comprising fixation parts (2A, 2B), wherein the main portion (1) comprises a part made of a first biocompatible, non-resorbable material extending between the two end portions (1A, 1B), wherein the reinforcing part (2) and the fixation parts (2A, 2B) are made of a second biocompatible, non-resorbable material and wherein the reinforcing part (2) extends between the fixation parts (2A, 2B) and wherein the fixation parts (2A, 2B) have a through hole (3A, 3B), the first biocompatible, non-resorbable material has a tensile modulus of at most 100 MPa as determined by ISO 527-1 and the second biocompatible, non-resorbable material has a tensile modulus of at least 101 MPa as determined by ISO 527-1.

Abstract: A drive unit for the movement of an active element with respect to a passive element, wherein the active element includes a resonator and at least one excitation device for exciting oscillations of the resonator. The resonator includes contact regions for exerting forces onto the passive element. The active element may be driven with respect to the passive element by way of oscillating movements. The resonator includes at least two arms, preferably a pair of arms. The at least two arms of an arm pair, proceeding from a connection region of the resonator, are formed on the same side of the resonator. In each case the contact regions are formed at the outer ends of the arms, wherein the contact regions may be moved to and away from one another by way of oscillating movements of the arm pair. Thereby, a relative movement of the passive element with respect to the active element may be effected.

Abstract: A drive unit for the movement of an active element with respect to a passive element, wherein the active element includes a resonator and at least one excitation device for exciting oscillations of the resonator. The resonator includes contact regions for exerting forces onto the passive element. The active element may be driven with respect to the passive element by way of oscillating movements. The resonator includes at least two arms, preferably a pair of arms. The at least two arms of an arm pair, proceeding from a connection region of the resonator, are formed on the same side of the resonator. In each case the contact regions are formed at the outer ends of the arms, wherein the contact regions may be moved to and away from one another by way of oscillating movements of the arm pair. Thereby, a relative movement of the passive element with respect to the active element may be effected.