Stapled hemorrhoidectomy is associated with more pain and minor morbidity than rubber band ligation in the treatment of Grade III and small Grade IV piles. However, for those patients who do not want the risk of further intervention procedures, stapled hemorrhoidectomy offers the better chance of a symptomatic cure.

O-arm navigation does not provide any significant advantage over conventional free-hand pedicle screw insertion technique in patients with single-level degenerative spondylolisthesis. The accuracy is dependent on the distance of the tracker from the level of instrumentation. Lateral perforations are more common because of instability at the instrumented level leading to translation and rotation of the vertebral body while placing pedicle screws leading to preferential lateral trajectory. These lateral perforations could not be prevented by using navigation. However, no significant complications were noted in either technique.