title: Examination of the nasofrontal duct in situ and in removable plastic casts.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005626:Frontal Sinus / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008961:Models, Structural; D009666:Nose / Q000033:anatomy & histology*; D012826:Silicone Elastomers
chemical_list: D012826:Silicone Elastomers