title: Difficult, but vital treatment.
authors.affiliation: Northern Arizona University.
authors.forename: T
authors.initials: T
authors.lastname: O'Hehir
mesh_terms: D012534:Dental Scaling / Q000295:instrumentation*; D006801:Humans; D010510:Periodontal Diseases / Q000628:therapy; D014092:Tooth Root / Q000601:surgery*