| 摘要 |
<p>A trial instrument for use in orthopaedic surgery includes a handle for manipulating the instrument and a body portion for location in a bone cavity. The body portion is shaped as a shallow bowl with a base wall and a side wall such that the depth of the body portion is less than the distance across the body portion in at least one direction. The body portion has first and second openings through its base wall, the first opening being located adjacent to the side wall towards a first side of the body portion and the second opening being located adjacent to the side wall on a second side of the body portion which is generally opposite to the first side. The side wall of the body portion occludes at least one of the openings at least partially when the body portion is viewed from a position on a plane which extends out of the body portion and which includes a line extending between the midpoints of the first and second openings, the position being outside a conical viewing zone having a cone angle of 20°.</p> |
