This multicenter retrospective study examined outcomes of 62 Pauwels type-3 femoral neck fractures (fracture angle ≥70°, OTA 31B2.3) in patients with a mean age of 42 years. It compared cannulated screw fixation versus fixed-angle devices to characterize nonunion rates, osteonecrosis, and the role of reduction quality in this high-shear fracture pattern. All fractures were treated within 24 hours by fellowship-trained traumatologists at three level-I trauma centers.
A Pauwels type-3 fracture is not just a steep femoral neck fracture — the near-vertical orientation converts hip loading into shear rather than compression, and that physics problem does not disappear with good technique.
When you see a fracture line ≥70° from horizontal in a young patient, counsel them upfront: nonunion risk is roughly twice that of standard femoral neck fractures even with anatomic reduction and early surgery.
Lean toward a fixed-angle device (dynamic hip screw, cephalomedullary nail, or blade-plate) over cannulated screws alone. The 11-percentage-point difference in nonunion (8% vs 19%) did not reach significance in this series, but the biomechanical rationale is sound and the trend is consistent.
If screws are used and fixation fails, revision to a fixed-angle construct is a viable salvage. All three such cases in this series went on to union.
This multicenter retrospective study examined outcomes of 62 Pauwels type-3 femoral neck fractures (fracture angle ≥70°, OTA 31B2.3) in patients with a mean age of 42 years. It compared cannulated screw fixation versus fixed-angle devices to characterize nonunion rates, osteonecrosis, and the role of reduction quality in this high-shear fracture pattern. All fractures were treated within 24 hours by fellowship-trained traumatologists at three level-I trauma centers.
A Pauwels type-3 fracture is not just a steep femoral neck fracture — the near-vertical orientation converts hip loading into shear rather than compression, and that physics problem does not disappear with good technique.
When you see a fracture line ≥70° from horizontal in a young patient, counsel them upfront: nonunion risk is roughly twice that of standard femoral neck fractures even with anatomic reduction and early surgery.
Lean toward a fixed-angle device (dynamic hip screw, cephalomedullary nail, or blade-plate) over cannulated screws alone. The 11-percentage-point difference in nonunion (8% vs 19%) did not reach significance in this series, but the biomechanical rationale is sound and the trend is consistent.
If screws are used and fixation fails, revision to a fixed-angle construct is a viable salvage. All three such cases in this series went on to union.