| 摘要 |
The invention relates to a system for preparing and grinding out an acetabulum in natural pelvis bones (16). The system comprises the following: a supporting surface for the patient (1); a calibration aid (2), directly connected to the patient supporting surface (1) and capable of being locked in the desired position; a grinding cutter (4) for grinding out the acetabulum, said cutter being equipped in the line of vision of the operator with an electronic receiver/display unit, which detects and displays the current spatial position of the longitudinal axis of the grinding cutter (4) in relation to a locating signal; a locating device (6), which emits the locating signal towards the receiver/display unit (5). The retaining device (3) of the calibration aid (2) has a recess (7) for the grinding cutter (4), into which the latter can be placed after the individual setting of the desired antecurvation and entry angles by pivoting the retaining device (3). The longitudinal axis of the grinding cutter (4) thus adopts the desired spatial orientation for insertion in situ. Said spatial orientation is then stored as a reference position on the receiver/display unit (5), which stores the corresponding values of the locating signal that have been received by the locating device (6). Once this reference value has been set, the grinding cutter (4) can be repositioned in its preset spatial orientation in the acetabulum, after being removed from the recess (7), using the optical display. |
