title: [Treatment of curved canals: from stainless steel to nickel titanium].
abstract: Endodontic treatment of curved canals is always more difficult than straight canals, especially for the apical zone preparation: root canals may present several curvatures in different space directions. From an anatomical point of view root canals with accentuated curvatures are a very frequent event (more than we might think); radiological exams, in fact, give us only a 2D image, and we can observe mesial or distal curvatures but not those in the oral or buccal direction. However, all root canals have curvatures of some degrees; even those that appear straight. Because of this, endodontitis have made many attempts to overcome these problems and manage to have a good preparation in curve canal. The authors analyse all endodontic techniques (step back, step down, crown down, balanced forces) codified in the course of the years, to prepare curved canals; they both in shape or in materials. It's fundamental for the endodontist to have a specific technique to treat curved canals to allow a good, wide preparation; in this way it's possible to make a better and tridimensional filling of the endodontic space above all in the tipical zone.
authors.affiliation: Cattedra di Odontoiatria Conservatrice, I Facoltà di Medicina e Chirurgia, Università degli Studi di Roma La Sapienza, Rome.
authors.forename: G
authors.initials: G
authors.lastname: Migliau
authors.forename: S
authors.initials: S
authors.lastname: Turco
authors.forename: A
authors.initials: A
authors.lastname: Guida
authors.forename: L
authors.initials: L
authors.lastname: Gallottini
mesh_terms: D003722:Dental Alloys; D003786:Dental Pulp Cavity / Q000002:abnormalities* / Q000000981:diagnostic imaging; D006801:Humans; D009532:Nickel; D011859:Radiography; D018915:Root Canal Preparation / Q000379:methods*; D013193:Stainless Steel; D014025:Titanium
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D013193:Stainless Steel; D009532:Nickel; D014025:Titanium