Conjunctivodacryocystorhinostomy with a borosilicate glass tube (Pyrex tube, Gun-ther Weiss, Scientific Glass Blowing Co, Beaverton, Ore) is the usual procedure for a total canalicular block; however, in patients in whom the tube comes out, there is a high incidence of closure of the tract. Full-thickness buccal mucosa was used to line the conjunctivodacryocystorhinostomy tract in 17 patients to determine whether the conduit would function adequately without a tube. Four patients elected to go without tubes and have remained improved with positive results of primary dye tests. The remaining 13 chose to retain their tubes.
Leone CR. Conjunctivodacryocystorhinostomy With Buccal Mucosal Graft. Arch Ophthalmol. 1995;113(1):113-115. doi:10.1001/archopht.1995.01100010115031