Abstract: A line of joint implant systems includes an implant including a cup to be affixed in one of the elements of the considered joint, defining a smooth inner cavity of substantially hemispherical shape. The implant also includes an insert, mobile within the inner cavity of the fixation cup and having its smooth outer surface intended to cooperate by ball-and-socket joint with the inner cavity, and defining in turn a smooth inner cavity of substantially hemispherical shape. The implant further includes a head or ball, solid with a second element of the joint, of spherical shape, intended to be received in the inner cavity of the mobile insert and to form a second ball-and-socket joint. The ratio of the inner diameter of the inner cavity of the fixation cup to the inner diameter of the inner cavity of the mobile insert is constant, whatever the diameter of the selected ball.

Abstract: An acetabular implant for a hip prosthesis including: a fixation cup defining an inner cavity having a substantially hemispherical shape, made of polyethylene and having, on its outer wall, means capable of favoring its fixation with cement within the acetabular cavity of the pelvis of the patient to be prosthesized, the inner cavity being coated with an armoring made of a biocompatible material of high hardness, said armoring defining the smooth inner cavity of substantially hemispherical shape intended to receive the mobile insert; an insert, mobile within said inner cavity and having its smooth outer surface intended to cooperate by ball and socket joint with the inner cavity of the fixation cup, and defining in turn a smooth inner cavity also having a substantially hemispherical shape; said mobile insert being made of high-density polyethylene; a prosthetic femoral head or prosthetic ball, secured to a femoral stem, of spherical shape and intended to be received in the inner cavity of the mobile insert

Abstract: An anchoring stem for a joint prosthesis with a centromedullary fixation includes a metaphyseal-diaphyseal (M-D) portion intended to be inserted into the medullary canal of the long bone of the joint to be prosthesized. It receives an epiphyseal-diaphyseal (E-D) portion, having its upper portion protruding from the considered bone and intended to receive in turn an articular element. The M-D portion and the E-D portion are independent from each other but may be fastened to each other. The E-D portion is received within the M-D portion along a direction parallel or substantially parallel to the main dimension of the M-D portion, along a length of cooperation of the portions with each other such that the ratio of the length of reception of the E-D portion within the M-D portion to the total length of the M-D portion is in the range from 0.5 to 0.85.

Abstract: A line of joint implant systems includes an implant including a cup to be affixed in one of the elements of the considered joint, defining a smooth inner cavity of substantially hemispherical shape. The implant also includes an insert, mobile within the inner cavity of the fixation cup and having its smooth outer surface intended to cooperate by ball-and-socket joint with the inner cavity, and defining in turn a smooth inner cavity of substantially hemispherical shape. The implant further includes a head or ball, solid with a second element of the joint, of spherical shape, intended to be received in the inner cavity of the mobile insert and to form a second ball-and-socket joint. The ratio of the inner diameter of the inner cavity of the fixation cup to the inner diameter of the inner cavity of the mobile insert is constant, whatever the diameter of the selected ball.

Abstract: An osteosynthesis clip having an overall U-shape, comprising two anchor bars and a connecting bar. The connecting bar including a longitudinal opening adapted to assume a closed configuration and an open configuration. The clip comprises a compression piece having a broadly oval-shaped section, housed in the opening. The piece is adapted to be rotated within the opening, thus causing the opening to shift from its closed configuration to at least one the open configuration and vice versa.

Abstract: A surgical instrument for fitting a U-shaped osteosynthesis clip having two side bars linked together at the proximal ends by a transverse bar, the transverse bar and the proximal portions forming a proximal region of the clip, the instrument including: at least one recess intended for provisionally receiving the proximal region of the osteosynthesis clip, the distal ends of the two side bars projecting from the instrument; at least blocking means capable of preventing the translation movement of the transverse bar in the proximal and distal directions; at least anti-rotation means preventing the clip from rotating about the transverse bar; and spacing means capable of engaging with the proximal region in order to increase the distance between the distal ends of the two side bars. The invention also relates to a kit including such an instrument and to a clip intended for being received in such an instrument.

Abstract: An osteosynthesis clip having an overall U-shape, comprising two anchor bars and a connecting bar. The connecting bar including a longitudinal opening adapted to assume a closed configuration and an open configuration. The clip comprises a compression piece having a broadly oval-shaped section, housed in the opening. The piece is adapted to be rotated within the opening, thus causing the opening to shift from its closed configuration to at least one the open configuration and vice versa.