Intramedullary Fixation Techniques for the Anterior Pelvic Ring

Area of Science:

• Orthopedic Surgery
• Anatomy
• Medical Imaging

Background:

• The superior ramus presents an irregular, undulating osseous structure serving as a conduit for intramedullary screws.
• Significant variability exists in the curve and obliquity of the superior ramus osseous fixation pathway (OFP) in anteroposterior and coronal planes.

Purpose of the Study:

• To emphasize the mandatory need for a detailed understanding of osseous topography and its correlation with fluoroscopic imaging.
• To highlight the necessity of patient-specific intraoperative fluoroscopic views for safe implant insertion.

Main Methods:

• Review of anatomical variations in the superior ramus OFP.
• Analysis of fluoroscopic imaging correlation with osseous topography.
• Description of standard and modified intramedullary screw insertion techniques.

Main Results:

• Screw insertion direction (antegrade/retrograde) depends on fracture location, patient anatomy, and surgeon considerations.
• The number and size of screws are limited by the cortical boundaries of the OFP.
• Standard techniques are effective in most cases, with modifications available for challenging anatomy.

Conclusions:

• A comprehensive understanding of patient anatomy, injury patterns, and surgical techniques, coupled with appropriate fluoroscopic guidance, is essential for safe intraosseous intramedullary implant placement into the superior ramus OFP.