| 摘要 |
A prosthesis for femur replacement surgery has a stem which is received in the femur. The stem has a blind bore formed at an angle in the upper portion. A modular neck assembly is received in the blind bore. The neck assembly is formed at a desired angle with respect to the vertical axis of the stem. The neck assembly is keyed to the bore to obtain a desired degree of anteversion and offset by a desired rotation of the neck assembly within the bore. A unitary sleeve may be inserted in a canal in the femur to receive the stem and provide circumferential movement of the prosthesis within the femur canal. A porous coating is formed on the outer surface of the stem and the sleeve.
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