| 摘要 |
A trial implant component for use in a surgical procedure for replacement of a joint prosthesis at a joint between a long bone and another bone includes a metaphyseal part which can be located so that it extends into a cavity at the resected face of the long bone in contact with the internal wall of the cavity in the metaphyseal region. The metaphyseal part has a part of a spigot and socket assembly for engaging a mating component which has the corresponding part of the said assembly. The spigot and socket assembly defines an assembly axis, in which the ratio of the length of the metaphyseal part measured between the superior and inferior faces along the assembly axis to its width at the superior face measured generally along the medial-lateral axis is not more than about 1.0. The angle between the plane defined by the peripheral edge of the superior face of the metaphyseal part and the plane defined by the peripheral edge of its inferior face is not more than about 30~.
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