title: Biomechanical analysis of a transiliac internal fixator.
abstract: OBJECTIVE
  We evaluated the biomechanical characteristics of the transiliac internal fixator (TIFI) as compared to two well-established methods of internal posterior pelvic ring fixation.
  
  
  METHODS
  Six freshly frozen human pelves were used for simulated single-leg stance loading of an AO type C injury model (pubic symphysis diastasis and unilateral sacroiliac joint disruption). The symphysis rupture was stabilized with a dynamic compression plate. Afterwards the three internal stabilization systems (TIFI, iliosacral screws and ventral plate osteosynthesis) were analysed. Fragment movement was measured in a contact-free manner with a stereophotometric infrared system.
  
  
  RESULTS
  No significant differences in the three-dimensional deformation tolerated by the TIFI as compared to the other internal fixation systems were found.
  
  
  CONCLUSIONS
  The transiliac internal fixator provides the same biomechanical stability as the other reference implants tested. We suggest the use of this device as a suitable alternative to the other implants.
authors.affiliation: Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany. Thomas.Dienstknecht@klinik.uni-regensburg.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Dienstknecht
authors.forename: Arne
authors.initials: A
authors.lastname: Berner
authors.forename: Andreas
authors.initials: A
authors.lastname: Lenich
authors.forename: Johannes
authors.initials: J
authors.lastname: Zellner
authors.forename: Michael
authors.initials: M
authors.lastname: Mueller
authors.forename: Michael
authors.initials: M
authors.lastname: Nerlich
authors.forename: Bernd
authors.initials: B
authors.lastname: Fuechtmeier
mesh_terms: D001696:Biomechanical Phenomena; D001860:Bone Plates; D001863:Bone Screws; D002102:Cadaver; D019544:Equipment Failure Analysis; D005593:Fracture Fixation, Internal / Q000295:instrumentation* / Q000379:methods; D050723:Fractures, Bone / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007085:Ilium / Q000293:injuries / Q000503:physiopathology / Q000601:surgery*; D016268:Internal Fixators; D046548:Pubic Symphysis Diastasis / Q000503:physiopathology / Q000601:surgery*; D016059:Range of Motion, Articular / Q000502:physiology; D012421:Rupture; D012446:Sacroiliac Joint / Q000293:injuries / Q000503:physiopathology / Q000601:surgery*; D013314:Stress, Mechanical