Abstract: The invention shows a filling apparatus for the introduction of bone cement into the intramedullary cavity of a bone, preferably into the cavity of a femur bone. The apparatus has a filling cannula, at the end of which a rubber sleeve in the form of a sheet metal bell is fastened which projects with its movable part radially beyond the diameter of the filling cannula and axially beyond a lowermost outlet aperture of the filling cannula. Because the sleeve is executed in the lower expandable part with a thickness 1 mm<s<2 mm and is fastened above an uppermost outlet aperture of the filling cannula at a distance 3 mm<1<50 mm and projects with its lower edge beyond a lowermost deflection edge 11a of a lower outlet aperture by a distance 5 mm<a<50 mm, its cross-section adapts to the cavity wall when being introduced without getting caught up and seals it during the expulsion of the bone cement.

Abstract: Areal spacers for prosthesis parts can be cemented into bones and enable a prosthesis part to be cemented in with a correction of the position of its functional surfaces without producing additional risks during the cementing. Since the spacers themselves consist of hardened bone cement, a secure, homogeneous binding with the fluid bone cement arises. At the same time, these spacers also enable a fine kit-like graduation and an exact positioning of prosthesis parts during cementing.

Abstract: An implant, in particular an intervertebral prosthesis, which consists of an elongated elastic body which is form-elastic and takes on the form of a spiral S in the force-free state. The spiral can be drawn by a reverse winding up into an insertion instrument which is only insubstantially larger in the insertion region than the cross-section of the elongated elastic body in order to reach the inner space of an intervertebral disc through a small opening in the annulus fibrosus and to push in and sever off the self-winding spiral when the interior is filled. This has the advantage that inner spaces of differing sizes can be filled with the same spiral.

Abstract: The tibia platform (1) contains a joint support (5) and an anchoring part (4) with passage openings (12) for fastening elements (14) for fastening the anchoring part (4) to the tibia bone (3). The passage openings (12) are each executed with a femur-side, upper countersink (25). At least one passage opening (12) not used for the fastening is provided with a closure plug (15) which can be inserted from above, which is executed with a supporting surface (16a) running around this sealing surface (16a) and can be braced in the countersink (25). The closure plug (15) contains a number of spring tongues (18) which can be introduced into the relevant passage opening (12) and which form a snap connection with the wall of the passage opening (12), and a central cylindrical protusion (17) which is provided with a blind bore (17a) open upwards for receiving a setting tool (20).

Abstract: The artificial hand joint comprises a proximal joint part securable to the radius with a groove-like guide track and a distal joint part securable to the os capitatum with two supporting heads placed alongside one another, displaceable in the guide track in the direction of their longitudinal extent, and mounted so as to be inclinable in the transverse direction. These are executed with spherical support parts, each of which cooperates with a guidance section of the guide track. By means of the two supporting heads a stable guidance of the distal joint part in the direction of the extension movements is achieved. The guide track and the proximal joint part can be executed with advantageously small cross sectional dimensions so that the intrusions into the implantation region of the hand joint can be kept to a minimum.