Purpose: To compare the success rate of monocanalicular (MI) and bicanalicular intubation (BI) in congenital nasolacrimal duct obstruction (CNLDO).
Methods: MI through the inferior canaliculus and BI were performed under general anaesthesia in children from 7 to 24 months old with CNLDO. Only children after unsuccessful conservative therapy and two and more probings were included in the study. The tubes were removed 3 months after intubation and the therapeutic success was evaluated 6 months after intubation.
Results: There were performed 139 MI in 114 children and 119 BI in 88 children. The success rate 6 months after intubation is 135/139 (97.1%) in MI, 114/119 (95.8%) in BI and the difference in therapeutic results between MI and BI is not significant (p = 0.737).
Conclusion: Silicone intubation is an effective procedure for treating CNLDO without difference in therapeutic success between MI and BI.