Permanent middle ear aeration.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000388:Air; D001284:Atrophy; D002648:Child; D002675:Child, Preschool; D002781:Cholesteatoma / Q000601:surgery; D004432:Ear, Middle / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D010033:Otitis Media / Q000601:surgery*; D019736:Prostheses and Implants; D012408:Rubber; D012828:Silicones; D013492:Suppuration; D014432:Tympanic Membrane; D014433:Tympanoplasty
D012828:Silicones; D012408:Rubber