| 摘要 |
<p>A patella milling instrument (12) has a planar base (14) with a fixed patellar clamping element (24) formed thereon. A movable clamping element (20) is slidably mounted on the base (14) and is movable towards and away from the fixed clamping element. A drive element is operable between the base and the movable element for moving the movable clamping element. The drive element (42) is actuated by a drive mechanism (2,6,7,8,9) fixed in a handle of the device found at one end thereof and connected to drive element (42) which is also in the form of a ratchet element. A movable end mill type cutting element (32) is mounted on a support arm (26) supported by the base. The support arm (26) is capable of movement in directions parallel to the plane of the base and is adjustable in a direction perpendicular to the base. The end mill (32) has a drive shaft (30) rotatably mounted in a bushing (28) in an end of the support arm which drive shaft is rotatable by a power tool and capable of movement in a direction perpendicular to the plane of the base. <IMAGE></p> |
