title: [The limits of root planing in the furcation area. A mathematical comparison of the radii of curvature on the root surfaces and on the curettes].
abstract: In order to draw some conclusions about the furcation region accessibility for periodontal instruments and their cleaning effect, the curvature radii of the root faces of 31 lower molars were mathematically determined and compared with the curvature radii of the working end of normally available curettes. From the results of this work it can be seen, that the Gracey curettes have an essential greater curvature radius as the curvature radius of the root faces. On the other site the special curettes for root planing in the furcation region have a smaller curvature radius as that of the root faces. Using the instruments included in this study, it is not possible to achieve an optimal root planing.
authors.affiliation: Abteilung für Zahnerhaltung und Parodontologie, Klinik und Poliklinik für Zahn-, Mund- und Kieferkrankheiten, Universität des Saarlandes, Homburg.
authors.forename: E
authors.initials: E
authors.lastname: Roussa-Tsoulou
authors.forename: W
authors.initials: W
authors.lastname: Schug
authors.forename: J
authors.initials: J
authors.lastname: Stüben
mesh_terms: D006801:Humans; D066298:In Vitro Techniques; D008433:Mathematics; D008963:Molar; D009811:Odontometry / Q000379:methods; D016745:Root Planing / Q000295:instrumentation* / Q000379:methods; D013499:Surface Properties; D014092:Tooth Root / Q000033:anatomy & histology*
vernacular_title: Grenzen der Wurzelglättung im Furkationsbereich. Ein mathematischer Vergleich der Krümmungsradien an den Wurzeloberflächen und den Küretten.