A second 1-cm stab incision is made in the sagittal plane down to the fragment, approximately 2 cm proximal to the coronary band.
A spinal needle is carefully inserted through this incision and the extensor tendon under arthroscopic supervision. Advancement of the needle along the articular surface of the fragment in the sagittal plane occurs under arthroscopic supervision as well. This needle serves as a guide during screw insertion.
Careful manipulation of the needle may also assist during anatomical reduction of the fragment.