| 摘要 |
A description is given of a set of mobile necks for inserting into the stem of a hip prosthesis, in which the mobile necks are produced with different inclinations and lengths in such a way that their free ends, when inserted in the stem, terminate at nine mutually equidistant points arranged in three parallel horizontal rows in such a way that the lines joining the outermost points delineate a square, the length of whose sides is approximately 15 mm, the diagonal of this square coinciding with the axis of a mobile neck set at a neutral inclination, that is neither varus nor valgus, with respect to a plane essentially perpendicular to the axis of the stem.
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