Nasolacrimal duct obstruction after maxillary orthognathic surgery.

Purpose: To report cases of nasolacrimal duct obstruction (NLDO) after maxillary orthognathic surgery.

Materials And Methods: The authors reviewed the clinical manifestations, dacryocystographic images, and orbital computed tomographic scans of 10 patients who were diagnosed with NLDO after undergoing maxillary orthognathic surgery.

Results: Six of the 10 patients (60%) complained of epiphora immediately after the surgery. Bilateral (n = 2, 20%) or unilateral (n = 8, 80%) NLDO occurred in all patients involved in the study. Twelve eyes of 10 patients were examined, and dacryocystography showed that the obstruction was present in the distal ostium in 7 eyes (58.3%), the junction between the sac and duct in 3 eyes (25%), and the common canaliculus in 2 eyes (16.7%). Computed tomographic scans of all subjects showed that mucosal swelling and congestion around the distal NLD opening narrowed the space between the lateral nasal wall and the inferior turbinate of the affected side. Dacryocystorhinostomy was performed in 9 eyes (8 patients), with a success rate of 100%.

Conclusions: The distal to proximal portion of the NLD can become obstructed after maxillary orthognathic surgery. This obstruction seems to be caused by secondary inflammatory changes associated with an indirect injury of the NLD. Therefore, clinicians should be aware of the possibility of NLDO after orthognathic surgery, which can be treated successfully with dacryocystorhinostomy.