| 摘要 |
The present invention relates to apparatus and methods for stabilizing and or maintaining adjacent bone portions in predetermined desired relationships and for constraining one, two or three-dimensional motion and/or rotation of the adjacent bone portions. Prostheses according to the present invention include cooperating magnetic arrays, preferably with plural magnets generating composite magnetic fields with predetermined field characteristics. The predetermined field characteristics are selected to interact such that the magnetic arrays on opposing prosthetic components cooperate to urge the bone portions into predetermined desired relationship and to constrain relative motion between the adjacent bone portions in various dimensions, e.g., rotation, flexion and/or extension thereof. Such magnetic constraint permits absorption and/or release of stress generated by externally applied forces. |
