title: [Comparative study on the strength of different mechanisms of operation of multidirectionally angle-stable distal radius plates].
abstract: BACKGROUND
  Polyaxial angle-stable plating is thought to be particularly beneficial in the management of complex intra-articular fractures of the distal radius. The present study was performed to investigate the strength of polyaxial locking interfaces of distal radius plates.
  
  
  METHODS
  We tested the polyaxial interfaces of 3 different distal radius plates (2.4 mm Variable Angle LCP Two-Column Volar Distal Radius Plate, Synthes, Palmar Classic, Königsee Implantate and VariAx Plate Stryker). The strength of 0° and 10° screw locking angle was obtained during static loading.
  
  
  RESULTS
  The strength of Palmar Classic with a 0° locking angle is significantly the best of all tested systems. With a 10° locking angle there is no significant difference between Palmar Classic, Two column Plate and VariAx Plate.
  
  
  CONCLUSIONS
  The strength of polyaxial interfaces differs between the tested systems. A reduction of ultimate strength is due to increases of screw locking angle. The design of polyaxial locking interfaces should be investigated in human bone models.
authors: Klinik für Unfall-, Hand- und Wiederherstellungschirurgie, Klinikum der Friedrich-Schiller-Universität Jena, Erlanger Allee 102, Jena. sascha.rausch@med.uni-jena.de
authors: S
authors: S
authors: Rausch
authors: K
authors: K
authors: Hoffmeier
authors: B G
authors: BG
authors: Gueorguiev
authors: K
authors: K
authors: Klos
authors: F
authors: F
authors: Gras
authors: G O
authors: GO
authors: Hofmann
authors: T
authors: T
authors: Mückley
mesh_terms: D001860:Bone Plates; D001863:Bone Screws; D019544:Equipment Failure Analysis; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D006801:Humans; D011474:Prosthesis Design; D011885:Radius Fractures / Q000601:surgery*; D013314:Stress, Mechanical; D013718:Tensile Strength; D014954:Wrist Injuries / Q000601:surgery*