A Comparative Study of Endoscopic Endonasal Dacryocystorhinostomy Using an Inferiorly Based Flap Versus a Posteriorly Based Flap.

To evaluate the outcome and complications of Endoscopic endonasal Dacryocystorhinostomy (DCR) using an inferiorly based mucosal flap as compared to a conventional posteriorly based mucosal flap with flap preservation and no stenting. 36 patients presenting with nasolacrimal duct obstruction were divided into two groups: the first group underwent endoscopic DCR using an inferiorly based mucosal flap, and the other group used a posteriorly based mucosal flap. In both groups, the mucosal flap was preserved, and bone was removed using Kerrison's punch.