[Curved osteotomy technique for intertrochanteric varus surgery--an experimental and computer-assisted surgery]

Area of Science:

• Orthopedic surgery
• Biomechanics
• Surgical techniques

Background:

• Conventional intertrochanteric osteotomies often lead to leg length discrepancy and abductor muscle weakness.
• These complications can significantly impact patient mobility and functional recovery.

Purpose of the Study:

• To present and evaluate a novel curved osteotomy technique for intertrochanteric fractures.
• To compare the outcomes of the curved osteotomy with the conventional wedge technique.

Main Methods:

• A comparative study of 189 intertrochanteric barrel vault (curved) and wedge osteotomies.
• Preoperative radiographs were digitized for computer-aided planning to optimize leg length, bone contact, femoral offset, and abductor muscle length.
• Experimental validation using human autopsy femora was performed.

Main Results:

• The barrel vault osteotomy resulted in significantly less leg shortening (average 3.9 mm) compared to the wedge technique (average 13.6 mm).
• Bone contact area at the osteotomy site was substantially larger with the barrel vault technique (1731.6 mm²) versus the wedge technique (783.7 mm²).
• Abductor muscle length remained stable with the curved osteotomy, unlike the wedge procedure.

Conclusions:

• The intertrochanteric curved osteotomy offers superior outcomes regarding leg length preservation and bone contact area.
• This technique effectively mitigates the risk of abductor muscle insufficiency, making it a favorable alternative to conventional methods.