Abstract: A prosthetic femoral implant has a stem having a proximal end and a distal end. A circumferential collar is formed on the proximal end of the stem having a proximally facing surface in the form of a circular disc extending radially inwardly and proximally from a maximum outer circumference to a central neck region. The collar has a distally facing surface extending radially inwardly and distally at an included angle with respect to a central longitudinal axis of the neck region of between 120 and 140°. The distal surface of the collar is v-shaped and may be conical in form.

Abstract: A prosthetic femoral implant has a stem having a proximal end and a distal end. A circumferential collar is formed on the proximal end of the stem having a proximally facing surface in the form of a circular disc extending radially inwardly and proximally from a maximum outer circumference to a central neck region. The collar has a distally facing surface extending radially inwardly and distally at an included angle with respect to a central longitudinal axis of the neck region of between 120 and 140°. The distal surface of the collar is v-shaped and may be conical in form.

Abstract: An intervertebral linking device of the type comprising bone anchoring elements to be interconnected by at least one intervertebral linking rod. The intervertebral linking device includes a the fixing system mounted on a connection bar the fixing system including at least one sliding displacement of the fixing system associated with a locking nut to lock said system in a fixed position. The connection bar is mounted on each anchoring element a guiding collar in rotation around an axis of the connection bar and locking the connection bar in a fixed specific position.

Abstract: The invention concerns an intervertebral linking device of the type comprising bone anchoring elements (3) to be interconnected by means of at least one intervertebral linking rod (15).