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Updated: Jun 2, 2026
A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats
Published on: May 20, 2019
Biomechanical analysis of a transiliac internal fixator
Thomas Dienstknecht1, Arne Berner, Andreas Lenich
1Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany. Thomas.Dienstknecht@klinik.uni-regensburg.de
Purpose:
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.
