title: [Stability of pedicle screws. 1: Maximum pullout force in healthy bony spine trunks with reference to drilling technique].
abstract: Pullout direction was axial and oblique to screw axis. Two different techniques of preparing the screw bed are matched: 1) 3.2 mm AO drill and 6.0 mm screws for D7-S1 and 4.5 mm screws for D11-D6, 2) resection of cancellous bone of the pedicle tube and 6.0 mm, 7.0 mm, 8.0 mm screws, which were inserted after measuring each level. With the better technique 1 (saving the cancellous bone) 620N-161N were reached from D1-S1, even if bigger screws could be used with technique 2.
authors.affiliation: Orthopädische Klinik, Medizinischen Hochschule Hannover.
authors.forename: A
authors.initials: A
authors.lastname: von Strempel
authors.forename: T
authors.initials: T
authors.lastname: Seidel
authors.forename: W
authors.initials: W
authors.lastname: Plitz
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D055592:Biophysical Phenomena; D001703:Biophysics; D001863:Bone Screws; D006801:Humans; D066298:In Vitro Techniques; D011474:Prosthesis Design; D013123:Spinal Fusion / Q000295:instrumentation*
vernacular_title: Stabilität von Pedikelschrauben. Teil 1: Maximale Auszugskräfte bei knochengesunden Stammwirbelsäulen unter Berücksichtigung der Bohrtechnik.