Abstract: A computer program for spine mobility simulation is configured, if running on a computer, to cause the computer to perform the following steps: a) accessing bio-metric data which relate to the spine of a patient, the spine having at least one compromised spine segment; b) displaying a model of the spine of the patient comprising a plurality of vertebrae; c) enabling a user to change the position of at least one of the vertebrae of the spine model; d) computing the effects of the position change on the remaining vertebrae; e) displaying the spine model in a new configuration, thereby taking into account the position changed by the user in step c) and the position changes of the remaining vertebrae computed in step d).

Abstract: A spine fixation system (10; 210; 310) comprises a first rod (16; 216) that connects a first vertebra (V2) to a second vertebra (V) but not to a third vertebra (V4), and a second rod (14; 214) that connects the second vertebra (V3) to the third vertebra (V4) but not to the first vertebra. The spine fixation system is configured such that first vertebra (V2), but not the third vertebra (V4), is allowed to move relative to the second (V3) vertebra after the spine fixation system has been completely implanted.

Abstract: A spine fixation system (10) comprises a rod (12a, 12b), which is configured to extend over a portion of the spine, a plurality of fasteners (14) and a plurality of connectors (18). Each fastener has a longitudinal axis (22) and is configured to be secured to a vertebra (V1, V2, V3) to be treated. Each connector (18) is connected to, or is capable of being connected to, one of the fasteners (14) and has a seat member (20) for receiving and fixing the rod (12a, 12b). The seat member (20) is capable of being fixed in different rotational positions with regard to a rotational axis (46) that extends, or is capable of being positioned such that it extends, parallel to but not coinciding with the longitudinal axis (22) of the fastener (14) to which the respective connector (18) is connected.

Abstract: An instrument set for screwing an implant into an intervertebral disc space comprises a guide sleeve and a screwing-in instrument. The latter has a shank having a distal end at which the implant can be fixed in a rotationally rigid manner. At the proximal end a rotary handle is fastened in a rotationally rigid manner. The screwing-in instrument further has a residual-advance indicator, which is configured to quantitatively indicate to the surgeon, during the screwing-in procedure, how far the implant is distant in the axial direction from an axial specified position that is fixed relative to the location at which the guide sleeve is supported on the vertebrae.

Abstract: The invention relates to a kit for constructing a spinal disk prosthesis provided for arrangement in a spinal disk compartment limited by vertebral bodies, comprising two prosthesis plates (10) which are disposed in a manner movable relative to each other, the exterior surfaces (12) of which are provided for contacting surfaces of vertebral bodies positioned on the opposite side, and the interior surfaces (14) of which form corresponding bearing surfaces of a pivot bearing (34; 134; 334; 434) after assembly. According to the invention, the kit further comprises a limiting device (24, 26; 150, 152; 254, 256; 364; 466), which is associated with the pivot bearing (34; 134; 334; 434), for limiting a pivot movement about a rotational axis (36) oriented substantially normally to the exterior surfaces (12) of the prosthesis plate (10). For this purpose, the limiting device may be connected to the prosthesis plates (10).

Abstract: The invention relates to a prosthetic body for an upper leg prosthetic comprising a shaft (5, 5a, 5b) having a proximal support plate (4) for a prosthetic head (15), wherein at least two proximally spaced and distally converging shaft posts (5a, 5b) are mounted on the support plate (4), descending below the same and connected by struts (6), particularly diagonal struts (6), and wherein cavities (12), and/or free open regions (12) are formed between the shaft posts (5a, 5b) and the struts (7), into which spongy bone can grow, wherein at least the lower connecting area of the support plate (4) whereon the shaft posts (5a, 5b) are mounted is disposed horizontally, the support plate (4), extending medially over the cross section of the shaft (5, 5a, 5b), immediately below the connection areas, and the support plate (4) transitioning ventrally and dorsally into the shaft (5, 5a, 5b) without protruding.

Abstract: An intervertebral implant has a head positioned at one end of the implant. The head has a conical portion, on which an external thread is formed, and an outer end region formed by a protective elevation. The elevation is, is viewed from the outside, convexly curved and free from sharp edges. A central portion is positioned between the head and a basic structure which is formed at an opposite end of the implant. The central portion is formed by a plurality of struts extending from the head to the basic structure. The central portion is provided with an external thread and has openings formed between the head, the struts and the basic structure.

Abstract: A prosthesis part can be implanted without the use of cement. The prosthesis part comprises: a cage structure, which unites with the spongy substance of the bone; a carrier plate which is connected to the cage structure; and a carrier post for a joint part. The carrier post is supported by the carrier plate. The carrier plate has openings through which a severing instrument, such as a chisel or milling cutter, is introducable in order to separate the cage structure at least to a large extent from the cortical substance of the bone.

Abstract: A prosthetic part includes an anchorage section that is introducable into a bone recess, the anchorage section comprising at least partially a cage structure, a plate section that extends in a lateral direction beyond the anchorage section, and a supporting section for a joint part. The plate section is provided with at least one opening or at least one indentation, through which a severing instrument is introducable to cut a connection between the anchoring section and corticalis substance of a bone. The plate section has a marginal region having a circumferential arrangement of indentations, and the at least one opening or the at least one indentation is elongated and extends parallel to an edge of the plate section.

Abstract: A set of prostheses of different sizes comprises in each case a pair of prostheses (10, 10*), which apart from the clear external contour of their anchoring sections (20, 20*) have the same geometry. The anchoring section (20) of a first prosthesis (10) of the pair is constructed as an anchoring section with a cage structure which can be implanted in a cement-free manner, whilst the anchoring section (20*) of the second prosthesis of the pair is constructed as an anchoring section with smooth boundary surfaces which is to be cemented in place. The clear external surface of the anchoring section (20) of the prosthesis (10) which is to be implanted in a cement-free manner lies at a substantially constant distance beyond the clear external surface of the anchoring section (20*) of the prosthesis (10*) which is to be cemented in place.

Abstract: A prosthesis element for a thigh prosthesis has a shaft which can be inserted into the upper end of a femur. The upper end of the shaft carries an inclined transverse support plate and a support post onto which a condyle can be fitted. The shaft has an upper proximal shaft section and a lower distal shaft section. These two shaft sections are tilted relative to one another to an acute angle. The shaft sections have substantially rectangular cross section and taper to the distal end of the shaft. One of the shaft sections comprises a lower section, which is twisted about the longitudinal axis of this shaft section.

Abstract: A prosthesis which is to be incorporated with the aid of cement has a support plate (24), which projects beyond a shaft (32) on all sides. Constructed in the shaft is an axial supply duct (36) for cement and a suction aperture (56) is provided in a projecting lateral section (28) of the support plate (24). The distal boundary surface of the support plate (24) supports a plastically deformable sealing frame (52). In this manner, the space between the corticalis internal surface and the shaft external surface is closed in a sealing-tight manner and can be evacuated by a suction pump (64). As a result, the intermediate space between the corticalis and the shaft can be filled with cement in an inclusion-free manner.

Abstract: A joint prothesis, which is suitable for small joints and can be implanted without using a cement, comprises two prothesis members (12, 14), each having a joint element (20, 22) made from from PE as well as an anchoring unit (16, 18) cast from titan. The anchoring unit (16, 18) each have a mounting plate (28) and at least one anchoring element (38) carried by the latter, which includes a core portion (40) and anchoring disks (42) carried by the latter. At least an end portion of the anchoring elements (38) is elastically and/or plastically deformable thus enabling the enchoring elements to conform to the contour of a cavity cut into a bone.

Abstract: An orthopedic prothesis component comprising a joint member and an anchoring member coupled thereto, said anchoring member including a plurality of elongated rod shaped anchoring posts and a support plate having an upper surface for carrying said joint member, and a lower surface configured to abut a resected surface of the bone and being connected to said anchoring posts, each of said anchoring posts containing a plurality of anchoring collars disposed at predetermined intervals along said posts, each of said collars having radial surfaces extending beyond the perimeter of said posts, whereby said collars serve to transfer loads imposed on the anchoring posts to spongiose material that is packed around said posts after the posts are positioned in the skeleton bone cavity.