Freehand vs. navigated iliac screw placement in spine surgery: 4 key findings

Imaging

A new study published in Spine compares freehand and navigated iliac screw placement.

 

Study authors conducted a retrospective review for a consecutive series of adult patients who underwent posterior reconstruction with iliac screw placement from 2011 to 2016. There were 222 screws placed in 111 patients, with 80 screws placed freehand and 142 screws placed with intraoperative navigation.

 

Study authors found:

 

1. CT imaging to assess placement accuracy in 37 percent of the freehand screws and 78 percent of the navigated screws showed similar accuracy. The freehand group had 89 percent accuracy, and the navigation group had 96 percent accuracy.

 

2. When intraoperative/postoperative CT imaging wasn't used to assess placement accuracy, the freehand group had 100 percent accuracy and navigated group had 98 percent accuracy.

 

3. There weren't any complications attributed to screw placement for either group.

 

4. Study authors concluded, "Overall, there was no difference in the safety and accuracy between the freehand and navigated techniques."

 

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