| 摘要 |
<p>To avoid using X-rays to target the distal bone screw holes (32A, 32B) of an interlocking intramedullary nail (30), the nail is provided with an additional transverse hole (34) for location of a short drilling jig after an 'oversize' hole (57) has been drilled in the bone (36) 'in register' with the location hole (34) by a drill (56) in a guide hole (55) in a long jig (49) accurately positioned from a standard proximal drill hole guide jig (38) 'pre-located' to the nail (30). By 'in register' is meant that the perimeter of the location hole (34) will lie within the perimeter of the 'oversize' hole (57) in the bone (36), and the location hole (34) is of lesser diameter than the distal bone screw holes (32A, 32B) so that the 'oversize' hole (57) in the bone (36) will not be damagingly large. Combination sets comprising a nail, bone screws, jigs and location means are also claimed.</p> |
