Figure 1From: Is the lag screw sliding effective in the intramedullary nailing in A1 and A2 AO-OTA intertrochanteric fractures? A prospective study of Sliding and None-sliding lag screw in Gamma-III nail The enrolled fracture types and grouping based on the AO/OTA classification: Group A: AO/OTA 31-A1; Group B: AO/OTA 31-A2.1; Group C: AO/OTA 31-A2.2, 2.3. Back to article page