| 摘要 |
A device (10) for effecting progressive elongation of a sectioned bone having no extra-cutaneous elements, and a method for using the device, are presented. The device (10) which includes a pair of telescopically engaged cylindrical members (20, 30) is inserted into the medullary space of the bone, and one cylindrical member (20, 30) is affixed to each section of bone. Under normal torsion experienced by the affected limb, a clutch mechanism (60, 70) is provided that causes the cylindrical members (20, 30) to be forced apart, separating the sections of bone, at which site new bone growth is stimulated. Rotations as small as one degree are sufficient to activate elongation. A mechanism is also provided for sensing and measuring the amount of elongation that has occurred extra-cutaneously. |
