Keywords:
Bones, Artificial Intelligence, Pelvis, CT, Computer Applications-Virtual imaging, Surgery, Prostheses, Trauma
Authors:
M. Feeney1, M. Galea1, K. Phan2, A. Hardidge1; 1VIC/AU, 2NSW/AU
DOI:
10.26044/ranzcr2019/R-0093
Conclusion
This study is the first to retrospectively use patient-specific data and 3D reconstructions to propose a novel method for surgeons to intraoperatively locate the optimal site and angles to maximise pin containment within the iliac wing.
By formally assessing the bony density in terms of coronal and sagittal planes of both males and females the study has demonstrated that surgeons need to be aware that the pin must be angled more medially when drilling into the female pelvis. This study has therefore provided a formal approach to finding the optimal placement for the pins and the angles that will provide the most stability and least harm. The ‘safe zone’ therefore improves surgical accuracy by stabilising the navigation hardware and reduces patient morbidity.
The ‘safe zone’ in both males and females is:
The palpable iliac spine that is approximately 70mm from the ASIS, aimed approximately 10 degrees posteriorly, and to a drilling to a depth less than 77mm. The pin should be aimed medially approximately 30 degrees in females, and approximately 25 degrees in males to accommodate for the anatomical difference in the angle of the ala of the ilium.