title: [Comparative strength analysis of selected osteosynthesis materials for pertrochanteric femoral fractures].
abstract: Four commercially available hip-fixation devices for stable fixation of pertrochanteric fractures were selected for a biomechanical evaluation, in order to determine, which construction would best support the load of weight-bearing in postoperative period. Intramedullar nailing by Lezius, Küntscher or Ender showed less bending moments than trifin nail-plates or extramedullar plate attachments with plate angles of 130 degrees or 95 degrees, so that bending tension of Lezius-nails were reduced compared to other implants in a proportion of 1.1,6:1,8:2,7. Whenever possible intramedullar nailing should be preferred. For extramedullar fixation of pathologic or unstable pertrochanteric fractures a double-T-plate was constructed, which shows a 3-fold load resistance of a Lezius-nail, 5-fold load-bearing of a 130 degree plate or a trifin nail combination and a 8-fold higher stress tolerance than a 95 degree-plate.
mesh_terms: D001696:Biomechanical Phenomena; D001858:Bone Nails; D001860:Bone Plates; D001863:Bone Screws; D005264:Femoral Fractures / Q000601:surgery*; D005594:Fracture Fixation, Intramedullary; D006801:Humans
vernacular_title: Vergleichende Kraftanalyse ausgewählter Osteosynthesematerialien für pertrochantere Oberschenkelfrakturen