title: Twenty years of endodontic treatment.
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D004812:Epidemiologic Methods; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D008885:Military Dentistry; D009426:Netherlands; D012390:Root Canal Therapy / Q000379:methods