title: Silastic prothesis to correct obstruction of nasolacrimal duct and to support the wall of lacrimal sac.
mesh_terms: D003608:Dacryocystorhinostomy; D006801:Humans; D007765:Lacrimal Apparatus / Q000601:surgery*; D009301:Nasolacrimal Duct / Q000601:surgery*; D019736:Prostheses and Implants; D012826:Silicone Elastomers
chemical_list: D012826:Silicone Elastomers