| 摘要 |
The device for performing osteosynthesis includes a fixation element, such as a bone plate having a bottom surface designed to bear against the bone, a top surface, and at least one through hole extending from the bottom surface to the top surface, the though hole having a central axis and configured and dimensioned to receive a multiaxially pivotal insert or bushing for a bone screw. A bushing insertable into the through hole, includes a central bore designed to receive a bone screw, the central bore having a longitudinal axis, and a peripheral outer surface designed to be in contact with the through hole. The bushing is configured and dimensioned to be radially compressible and radially expansible, and the cross section of the through hole, which is orthogonal to the central axis, is non-circular. The cross section of the bushing that is orthogonal to the longitudinal axis has a shape that corresponds substantially to the cross section of the through hole of the bone plate. When placed in the through hole, the bushing is rotationally fixed relative to its longitudinal axis, but remains pivotally adjustable within the through hole relative to the bone plate. |
