| 摘要 |
A positioning block ( 10 ) for use in total knee replacement surgery, permitting five degrees-of-freedom movement relative to a bone element ( 39 ) to which it is fixed. The positioning block ( 10 ) comprises a rotational mounting element ( 14 ) that is removably engaged to the bone element such that the mounting element ( 14 ) is selectively rotatable relative to the bone element, about three substantially perpendicular axes of rotation. A guide body portion ( 12 ) is engaged with the mounting element ( 14 ) such that it is translatable relative thereto along a proximal-distal axis ( 43 ) and an anterior-posterior axis ( 47 ), while being rotationally fixed relative to the mounting element ( 14 ) such that the guide body portion ( 12 ) and the mounting element ( 14 ) rotate together relative to the bone element ( 39 ).
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