since the very first descriptions of  surgical techniques aimed at restoring the functional integrity of  the paranasal sinuses . a number of surgical techniques as well as different surgical instruments have been introduced  attempted at improving the disease eradication as well as minimizing the adverse outcomes of the paranasal sinus surgery. The most important among all of them perhaps was the introduction of powered instruments (microdebrider) which has been subject of a lot of controversies regarding it’s efficacy  and safety. Our  study represents an endeavour to put an end to all such controversies by  in depth study of the efficacy as well as the adverse outcomes associated with the use of the powered instruments .