Fig. 6From: The application of a hollow trephine in femoral retrograde intramedullary nailing techniqueThe use of a hollow trephine can avoid wedge effectA: A simple femoral intercondylar fracture (AO/OTA classification 33.B1)B: A triangular pyramid distracts fracture gapC: The reamer wedges the fracture gapD: With the same start point, the hollow trephine does not distract the fracture gap and avoids the “wedge effect”Back to article page