The modified Stoppa approach allows for exposure of most (79%) of the inner true bony pelvis including the entire pelvic brim and 80% of the quadrilateral surface. On average, visualization is possible 2 cm above the pelvic brim and 5 cm below the pelvic brim along the quadrilateral surface, providing adequate anterior exposure for clamp and implant placement.

A substantial amount of anterior bone is removed during nail entry portal creation using both parapatellar and retropatellar techniques. Intra-articular structure damage, most commonly IM ligament disruption, was also found to occur at a lower rate with retropatellar technique. Avoidance of both anterior bone removal and IM ligament damage may not be possible because of size and geometrical constraints.

This study suggests that surgical and endovascular treatment of a UIA is associated with dramatic improvement in self-reported HA score an average of 32.4 months postoperatively.