Mechanical performance of hybrid Ilizarov external fixator in comparison with Ilizarov circular external fixator

The stiffness characteristics of hybrid Ilizarov fixators

“…Femoral arch increased axial stiffness in all hybrid models, but angles between the half-pins had no significant effect on axial stiffness and the use of the ring mounted with half-pin increased stiffness only in torsional testing (Pugh et al, 1999;Yilmaz et al, 2003). In our study, outcome data of C-arch with half-pins were not obviously supported to increase stiffness.…”

“…There are some reported studies which compare the biomechanical characteristics of the standard and hybrid models (Khalily et al, 1998;Pugh et al, 1999;Stein et al, 1997;Yang et al, 2003;Yilmaz et al, 2003). To our knowledge, the biomechanics of ring and cantilever fixation are different in principle.…”

“…Hybrid external fixators that use tensioned wires in the metaphysis and screws in the diaphysis combine the advantages of both unilateral and circular fixators and provide considerable flexibility in frame construction (Khalily et al, 1998;Yang et al, 2003). These hybrid forms of Ilizarov system application affect the mechanical properties at the fracture site (Yilmaz et al, 2003).…”

Outcomes following the treatment of bicondylar tibial plateau fractures with fine wire circular frame external fixation compared to open reduction and internal fixation: A systematic review

“…The so-called 'hybrid fixator' has been used, yet previously shown to produce significantly less bending and axial stiffness when compared to standard circular frames. [54][55][56] All the studies had a limited follow up period, which may not reflect the true impact of the injury. It was considered that significant loss of knee function related to secondary osteoarthritis occurs at an average of 4.6 years postinjury.…”

Computer-aided surgical planner for a new bone deformity correction device using axis-angle representation

“…Thus, as in previous literature [13,[32][33][34][35], we simulated the mechanical tests with the fixator in straight configuration with all joints zeroed. Since unilateral fixators are known to deform linearly with increasing load [13], stiffness is evaluated using a single loading force value of 100 N [13,36,37,38] at each loading point. Our fixator design has a longer moment arm and thus a greater bending moment on the pins in the inferior bone fragment.…”