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US 7,922,731 B2Granted
Surgical instrument and osteosynthesis device
AssigneeAesculap AG
InventorsJoerg Schumacher, Brian E. Dalton, Ulrich Hahn
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AssigneeAesculap AG
InventorsJoerg Schumacher, Brian E. Dalton, Ulrich Hahn
Estimating the term…
A surgical instrument for applying and fixing a fixation screw to a threaded section of a head of a bone anchorage element comprises a distal end and a proximal end, a first tool member and a second tool member. The first tool member is arranged at the distal end and adapted for engaging the threaded section of the bone anchorage element head. The second tool member is adapted for engaging a tool-engaging member of the fixation screw. The instrument is constructed such that in a working position of the instrument the second tool member is supported on the instrument in a torque proof manner relative to the first tool member about a longitudinal axis and is movable parallel to the longitudinal axis relative to the first tool member. Moreover, an osteosynthesis device comprising at least two bone anchorage elements and at least one connection member is suggested. Further, a method for fixing an osteosynthesis device on two vertebrae of a spinal column in a minimal invasive manner is proposed.
A surgical instrument for applying and fixing a fixation screw to an internally threaded section of a head of a bone anchorage element, the instrument comprising a distal end and a proximal end, a first tool member and a second tool member, the first tool member being arranged at the distal end and adapted for engaging the threaded section of the bone anchorage element head, and the second tool member being adapted for engaging a tool-engaging member of the fixation screw, wherein in a working position of the instrument the second tool member is supported on the instrument in a torque proof manner relative to the first tool member about a longitudinal axis and is movable parallel to the longitudinal axis relative to the first tool member, wherein the first tool member comprises a first externally threaded section corresponding to the internally threaded section of the bone anchorage element head.
A surgical instrument for applying and fixing a fixation screw to a threaded section of a head of a bone anchorage element, the instrument comprising a distal end and a proximal end, a first tool member and a second tool member, the first tool member being arranged at the distal end and adapted for engaging the threaded section of the bone anchorage element head, and the second tool member being adapted for engaging a tool-engaging member of the fixation screw, wherein in a working position of the instrument the second tool member is supported on the instrument in a torque proof manner relative to the first tool member about a longitudinal axis and is movable parallel to the longitudinal axis relative to the first tool member, wherein the instrument further comprises at least one distractor-engaging portion for connecting the instrument to a distractor.
A surgical instrument for applying and fixing a fixation screw to a threaded section of a head of a bone anchorage element, the instrument comprising a distal end and a proximal end, a first tool member and a second tool member, the first tool member being arranged at the distal end and adapted for engaging the threaded section of the bone anchorage element head, and the second tool member being adapted for engaging a tool-engaging member of the fixation screw, wherein in a working position of the instrument the second tool member is supported on the instrument in a torque proof manner relative to the first tool member about a longitudinal axis and is movable parallel to the longitudinal axis relative to the first tool member, wherein a reference element is provided on the instrument, the reference element being constructed such that it is detectable by a detection device of a navigation system.
Dependencies are inferred from the claim text.