摘要:
A damping element (1) includes: (a) two spring elements (2, 4) which are coaxial with or parallel to a longitudinal axis (3) and two axially end-side connectors (5, 6), where (b) the first spring element (2) exhibits a spring rate F, (c) the second spring element (4) exhibits a spring rate f, and (d) the spring rates F and f are different. A device stabilizing adjacent vertebras, comprising (a) N pedicle screws of hooks (12), where N≧3 and where (b) each pedicle screw or pedicle hook (12) includes a receiving device (13) receiving a longitudinal affixation device (7) and where (c) an element (14) acting as a spring is inserted between two adjacent pedicle screws (12) or pedicle hooks.
摘要:
A damping element includes: two spring elements which are coaxial with or parallel to a longitudinal axis and two axially end-side connectors, where the first spring element exhibits a spring rate F, the second spring element exhibits a spring rate f, and the spring rates F and f are different. A device stabilizing adjacent vertebrae, including N pedicle screws or hooks, where N is greater than or equal to 3 and where each pedicle screw or pedicle hook includes a receiving device receiving a longitudinal affixation device and where an element acting as a spring is inserted between two adjacent pedicle screws or pedicle hooks.
摘要:
A damping element (1) includes: (a) two spring elements (2, 4) which are coaxial with or parallel to a longitudinal axis (3) and two axially end-side connectors (5, 6), where (b) the first spring element (2) exhibits a spring rate F, (c) the second spring element (4) exhibits a spring rate f, and (d) the spring rates F and f are different. A device stabilizing adjacent vertebras, comprising (a) N pedicle screws of hooks (12), where N≧3 and where (b) each pedicle screw or pedicle hook (12) includes a receiving device (13) receiving a longitudinal affixation device (7) and where (c) an element (14) acting as a spring is inserted between two adjacent pedicle screws (12) or pedicle hooks.
摘要:
A damping element includes: two spring elements which are coaxial with or parallel to a longitudinal axis and two axially end-side connectors, where the first spring element exhibits a spring rate F, the second spring element exhibits a spring rate f, and the spring rates F and f are different. A device stabilizing adjacent vertebrae, including N pedicle screws or hooks, where N is greater than or equal to 3 and where each pedicle screw or pedicle hook includes a receiving device receiving a longitudinal affixation device and where an element acting as a spring is inserted between two adjacent pedicle screws or pedicle hooks.
摘要:
A bone fixation screw comprises a proximal head being configured to lockingly engage a bone plate hole and a substantially helical shaft extending distally from the head along a substantially helical path. The head and the shaft are rotatably coupled to each other so that the shaft can rotate about a central longitudinal axis thereof with respect to the head.
摘要:
An apparatus for leading a cerclage member along a desired path through a portion of bone, comprises a guide strip extending from a proximal end to a sharpened distal end, at least a portion of the guide strip being biased to assume a shape corresponding to a portion of a desired path along which the cerclage member is to pass through a portion of bone and a delivery cannula including a lumen sized to slidably receive the guide strip therein, the cannula maintaining the guide strip in a substantially straight configuration until the guide strip is extended distally out of the lumen.
摘要:
A device of performing osteosynthesis includes an osteosynthesis element, e.g., a bone plate, having an upper face, a lower face and an opening with a central axis linking the upper and lower faces. The opening receives a multi-axial pivotable insert for a longitudinal bone fixing element, such as a bone screw. The insert has a central passage with a longitudinal axis for housing the bone fixing element. The insert may be configured as a helical spring with an external sheath surface and an internal sheath surface that defines the central passage. When placed in the through hole, the insert is rotationally fixed relative to its longitudinal axis, but remains pivotally adjustable within the through hole relative to the osteosynthesis element.
摘要:
An expandable portion of an implant has a total volume and includes a plurality of chambers, each having a volume less than the total volume. At least one of the chambers includes a biocompatible media which is liquid at room temperature. The at least one chamber is closed, so that by increasing the temperature of the liquid, the pressure in the chamber increases.
摘要:
A method for replacing a portion of a target bone in a living body includes the steps of attaching one or more first markers to a target bone, establishing a medical three-dimensional representation of the target bone, performing a virtual resection of a resection portion, the virtual resection constructing a three-dimensional representation of the resection portion and a three-dimensional representation of the remaining target bone including cutting edges, providing a virtual pattern of the resection portion, obtaining an implant or graft portion for replacing the resection portion of the target bone by using the virtual pattern of the resection portion, resecting the resection portion from the target bone according to the virtual resection using the first reference system of coordinates and coupling the implant or graft portion to the target bone in a position substantially matching a position of the resection portion before the actual resection.
摘要:
A flexible dampening intervertebral spacer (100) to replace a spinal disc comprising upper and lower plates (101,103), an articulation element (102) and optional intermediate members (804,805). The articulation element has a plurality of interposed, concentric ring shaped segments (202) separated by one or more spaces (201) and one or more bridging elements (203) connecting the interposed segments. A first portion of the articulation element, preferably an innermost segment, is preferably fixedly connected to the upper plate while a second portion of the articulation element, preferably the outermost segment, is preferably connected to the lower plate to permit relative movement of the endplates by elastic deflection or flexing of the articulation element without opposed surfaces rubbing against each other.