Is augmented LISS plating biomechanically advantageous over conventional LISS plating in unstable osteoporotic distal femoral fractures?

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
Dimitar TodorovKarl Stoffel

Abstract

Treatment of complex osteoporotic distal femur fractures with the Less Invasive Stabilization System (LISS) has been associated with high complication rates. The aim of this study was to investigate the biomechanical competence of two different techniques of augmented versus conventional LISS plating. Unstable distal femoral fracture AO/OTA 33-A3 was created via osteotomies in artificial femora simulating osteoporotic bone. Three study groups, consisting of 10 specimens each, were created for fixation with either LISS plate, LISS plate with additional polylactide intramedullary graft, or LISS plate plus medial locking plate (double plating). All specimens were non-destructively tested under axial (20-150 N) and torsional (0-4 Nm) quasi-static loading. Each bone-implant construct was tested with two different working length (WL) configurations (long and short) of the LISS plate. Relative movements between the most medial superior and inferior osteotomy aspects were investigated via three-dimensional motion tracking analysis. Double plating revealed significantly smaller longitudinal and shear displacement than the other two techniques (p ≤ 0.001). In addition, LISS plus graft fixation was with significantly less longitudinal dis...Continue Reading

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Citations

Jun 18, 2019·The Journal of the American Academy of Orthopaedic Surgeons·Geoffrey Marecek, Hugo Centomo
Dec 21, 2018·Journal of Orthopaedic Trauma·Lyubomir RusimovAsen Baltov
Jun 8, 2021·Archives of Orthopaedic and Trauma Surgery·Graham J DeKeyserJustin M Haller

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