초록 ▼

An instrument including a cutter (2) mountable on a cutter 32 spindle (1) and shaped in such a way that it also acts as a test cup 33 engageable by a test head of a femoral prosthesis. The cutter (2) may be attached to the pelvis (34) by means of nails (29), and the cutter position is detected by si

An instrument including a cutter (2) mountable on a cutter 32 spindle (1) and shaped in such a way that it also acts as a test cup 33 engageable by a test head of a femoral prosthesis. The cutter (2) may be attached to the pelvis (34) by means of nails (29), and the cutter position is detected by sighting means (32) on the cutter spindle (1). The sighting means (32) are then used to arrange the final cup in the same position as the cutter (2) so that the position of the final cup may be selected in such a way that the risk of joint dislocation is reduced.

대표청구항 ▼

[ What is claimed is:] [1.] Instruments for fitting hip prostheses, comprising a milling tool support and at least one milling tool removably attachable to the milling tool support, the milling tool having a hollow substantially hemispherical dome with sharp-edged openings and an open base in which

[ What is claimed is:] [1.] Instruments for fitting hip prostheses, comprising a milling tool support and at least one milling tool removably attachable to the milling tool support, the milling tool having a hollow substantially hemispherical dome with sharp-edged openings and an open base in which are provided means for removably fixing the milling tool support, wherein:the substantially hemispherical dome includes additional openings of sufficiently large size to enable checking of contact between the bottom of the cotyloid cavity hollowed out by the milling tool and the hemispherical external surface of the milling tool fitted into said cavity,the milling tool includes a central interior core attached to the substantially hemispherical dome, with an external face separated from the wall of the substantially hemispherical dome to leave a passage for bone fragments cut off by the milling tool, and with an open concentric hemispherical recess at the base of the dome the inside diameter of which is chosen to correspond to the outside diameter of a femoral prosthesis head to be fitted,the milling tool is associated with means for temporarily fixing the milling tool into the cotyloid cavity formed.