| 摘要 |
External fixation apparatus includes two carriages for attaching to bone at opposite sides of a fracture. The carriages are formed with internal keyed bores for receiving a straight rigid rod formed longitudinally with a keyway for the carriage keys and with a screwthread for nuts screwed onto the rod to fix the carriages. In a case of bone misalignment, this rod is replaced by an angularly adjustable elongate device comprised of rods 1 and 2 with keyways 21 and 22 and screwthreads 23 and 24, hinge elements 3 and 4 releasably clamped by clamps 5 and 6 to the rods 1 and 2, a nut-and-bolt device 8 serving as a removable hinge pin and also to clamp releasably together the elements 3 and 4, two groups of holes 9 through the element 3 with the holes within each group equally pitched, holes through the element 4 similarly arranged except at a pitch less than that of the holes 9, and a locating member insertable through a selected hole 9 into a selected hole in the element 4. |
