Drilling jig for the determination of the axis of a femur head prosthesis
First Claim
1. A drilling jig for the determination of the axis of a femur head prosthesis (27) having a guide tube (6) around whose longitudinal axis (14) a sensing probe (13) can rotate in a plane of rotation (15) to sense a neck (16) of the femur at the transition to its femur head (10) and to centre the position of the longitudinal axis (14) with respect to the neck (16) of the femur by a displacement of the guide tube (6), wherein the guide tube (6) is pivotally mounted with a rounded head (7) in a housing (3) and can be fixed with first clamping elements (5) at a designated pivot angle α
- of its longitudinal axis (14) relative to the longitudinal axis (17) of the housing (3); and
the housing can be displaced in any direction transversely to its longitudinal axis (17) with respect to a base part (1) with a cut-out (37) which is provided for the fastening to a femur head (10) and can be fixed in a designated displacement position by second clamping elements.
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Accused Products
Abstract
The invention relates to a drilling jig for the determination of the axis of a femur head prosthesis. A guide tube (6), around whose longitudinal axis (14) a sensing probe can be rotated, has a rounded head (7) which is supported in a housing (3) pivotable in all directions and fixable by first clamping elements (5), in order to fix its longitudinal axis in a desired angle. The housing (3) is displaceable in all directions transversely to its longitudinal axis with respect to a base part (1) which can be anchored to the femur head (10) and fixable by two clamping elements (4) in order to define the position of the longitudinal axis (14) of the guide tube (6) by rotation of a sensing probe around this longitudinal axis (14) relative to the cross-section of the femur neck (16).
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Citations
10 Claims
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1. A drilling jig for the determination of the axis of a femur head prosthesis (27) having a guide tube (6) around whose longitudinal axis (14) a sensing probe (13) can rotate in a plane of rotation (15) to sense a neck (16) of the femur at the transition to its femur head (10) and to centre the position of the longitudinal axis (14) with respect to the neck (16) of the femur by a displacement of the guide tube (6), wherein the guide tube (6) is pivotally mounted with a rounded head (7) in a housing (3) and can be fixed with first clamping elements (5) at a designated pivot angle α
- of its longitudinal axis (14) relative to the longitudinal axis (17) of the housing (3); and
the housing can be displaced in any direction transversely to its longitudinal axis (17) with respect to a base part (1) with a cut-out (37) which is provided for the fastening to a femur head (10) and can be fixed in a designated displacement position by second clamping elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- of its longitudinal axis (14) relative to the longitudinal axis (17) of the housing (3); and
Specification