| 主权项 |
1. A method for treating a fracture of a bone with a medullary canal, comprising:
providing a first and second group of three elongated monocortical pins, each pin having a stem extending along a longitudinal axis with a smooth cylindrical portion having a given diameter and with a first end portion having a conical shape with an external thread and a length extending form the smooth cylindrical portion to a distal most tip of the threaded portion for the insertion into a cortical portion of a bone, wherein a ration between the length, measured along the longitudinal axis, of the threaded end portion and the diameter of the cylindrical portions is 1-1.2; inserting each pin of the first group of three monocortical pins at a predetermined proximal distance from the bone fracture, each pin of the first group penetrating with at least a portion of their respective threaded end portion only into a cortical portion of the bone without reaching the medullary canal, said pins of the first group being inserted in such a manner that their respective longitudinal axes do not share a common plane, so that they are not coplanar to each other; blocking the stem of the pins of said first group to a common first clamp element; inserting each pin of the second group of three monocortical pins at a predetermined distal distance from the bone fracture, each pin of the second group penetrating with at least a portion of their respective threaded end portion only into the cortical portion of the bone without reaching the medullary canal, said pins of the second group being inserted in such a manner that their respective longitudinal axes do not share a common plane, so that they are not coplanar to each other; blocking the stem of the pins of said second group to a common second clamp element; mounting said first and second clamp elements on a common rod to form a rigid external fixation system. |
