| 主权项 |
1. A prosthesis assembly configured for implantation into tissue, comprising:
a prosthesis comprising a driving portion and a base portion; the driving portion including a driving tip portion, a central portion, and a wedge portion, wherein the driving tip portion is shaped and dimensioned to penetrate bone to create a first bore; the base portion including a forward portion and a rearward portion, the forward portion being associated with the driving portion; the base portion comprising a first longitudinal portion that extends along the length of the base portion and a second longitudinal portion that extends along the length of the base portion; the first longitudinal portion and the second longitudinal portion being attached at the rearward portion, and the first longitudinal portion and the second longitudinal portion being separable at the forward portion; the first longitudinal portion being associated with a first surface of the wedge portion, and the second longitudinal portion being associated with a second surface of the wedge portion; the prosthesis including a longitudinal cavity that is between the first longitudinal portion and the second longitudinal portion, that is aligned with a longitudinal axis of the prosthesis, and that extends through the prosthesis at least from the forward portion of the base portion to the rearward portion of the base portion; wherein the longitudinal cavity has a first length; a tube having an end portion disposed adjacent to the rearward portion of the base portion, wherein the tube has a second length; a pin disposed in the longitudinal cavity and the tube, wherein the pin has a third length; wherein the pin contacts the driving portion and extends from the driving portion through the longitudinal cavity and beyond the rearward portion through the tube; wherein the third length of the pin is at least as long as the combined length of the first length of the longitudinal cavity and the second length of the tube; and wherein during implantation of the prosthesis:
the driving portion and the base portion of the prosthesis move in a forward direction from a pre-implantation position to a final implantation position, with no rearward direction movement,the end portion of the tube applies a force in the forward direction to the rearward portion of the base portion,the first longitudinal portion and the second longitudinal portion are configured to engage the wedge portion and spread apart from one another,the first longitudinal portion is shaped and dimensioned to penetrate the bone to create a second bore, wherein a direction of extension of the second bore differs from that of the first bore created by the driving tip portion, andthe second longitudinal portion is shaped and dimensioned to penetrate the bone to create a third bore, wherein a direction of extension of the third bore differs from that of the first bore created by the driving tip portion and the second bore created by the first longitudinal portion. |
