Device for forming a drill hole in bone

1. A device for a correctly targeted formation of a drill bore centrally in a femoral attachment site of a posterior cruciate ligament of a knee joint, comprising:

a hollow shaft for guiding a drill wire therethrough, and

a sighting element arranged at a distal end area of said hollow shaft,

at least one support element protruding distally from said sighting element, said at least one support element being designed as a pin;

said sighting element having an edge for placing said sighting element via said edge to an outer margin of a femoral attachment site of a posterior cruciate ligament,

said edge having a convex curvature which corresponds to said outer margin of said femoral attachment site of said posterior cruciate ligament;

said edge extending radially from said hollow shaft in a cross-section plane per-pendicular to a longitudinal axis of said hollow shaft;

wherein a radial distance from said edge to a centerpoint of said hollow shaft corresponds to a radial distance from the center of the femoral attachment site to the outer margin of said femoral attachment site.

2. The device of claim 1 , wherein a radial distance of said edge of said sighting element from a center point of said hollow shaft corresponds approximately to a radius of said outer margin of said femoral attachment site of said posterior cruciate ligament.

3. The device of claim 2 , wherein several sized sighting elements with different radial distances of said edge from said center point of said hollow shaft are provided.

4. The device of claim 1 , wherein said sighting element is arranged detachable on said hollow shaft.

5. The device of claim 1 , wherein said sighting element has a disk-like body.

6. The device of claim 5 , wherein said disk-like body has a circular edge.

7. The device of claim 6 , wherein said circular edge extends about a circumference of a part of a circle.

8. The device of claim 1 , wherein said sighting element has a disk-like body, said disk-like body having an opening for placing said disk-like body onto said hollow shaft.

9. The device of claim 8 , wherein said opening is round.

10. The device of claim 8 , wherein said opening is non-round.

11. The device of claim 1 , wherein a handle is arranged at a proximal end area of said hollow shaft.

12. The device of claim 11 , wherein said handle is arranged detachable at said proximal end area of said hollow shaft.