| 摘要 |
PROBLEM TO BE SOLVED: To provide an expansion and compression instrument for fracture fixation.SOLUTION: A bearing assembly 40 axially receives a driver 60, such as a screwdriver of a hexagon head. A replaceable tip insert 50 is adapted to engage an aperture of a fracture fixation plate 80. The driver is adapted to engage the head of a bone screw 91, partially threaded into bone proximate the fracture and disposed through a longitudinal slot of the plate. Manual manipulation of respective handle members together or apart causes the driver head and replaceable tip insert to become farther apart or closer together, respectively. Thereby a bone screw is disposed along the longitudinal slot and the fracture os expanded or compressed. Pivotal or hinged attachment of the bearing assembly to a handle member permits pivotal movement of the driver relative to the handle member and permits the jaws of the replaceable tip insert to remain in substantial engagement with the fracture fixation plate during expansion and compression. |
