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- Author or Editor: Alaettin Özer x
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Abstract
Background: The aim of this study was to create AO 44 A1, B1 and C1 fractures using finite element analysis (FEA), to determine the stability of k-wire, intramedullary screw (IS) and plate-screw (PS) fixation methods in fracture
Methods: Using FEA the post-reduction behaviour of AO 44 A1, B1 and C1 fractures with k-wire, IS and PS fixation methods was analysed and compared in terms of displacement and stress.
Results: The lowest amount of displacement was provided with the IS method in AO 44 A1 and B1. It was observed in the detection of 4 mm k-wire in AO 44 C1. The total displacement of the IS system used for fixation in AO 44 A1, B1 and C1 fractures was lower
Conclusions: According to FEA results, the lowest amount of displacement was obtained with IS in AO 44 A1 and B1, while 4 mm K-wire fixation was achieved in AO 44 C1 fractures.
Abstract
Background: Distal fibula fractures at the ankle level are common and are usually accompanied by ligament injuries. This study aims to evaluate the effects of ankle ligament ruptures on ankle joints, fracture instability, and plate stress after distal fibula fracture fixed with plate created by finite element analysis (FEA) modeling and loading applied to ligament rupture models that may accompany this fracture.
Methods: A finite element model consisting of 3-D (3D) fibula, tibia, foot bones, and ankle ligaments was designed to investigate the effects of ligament injuries accompanying plate-detected Arbeitsgemeinschaft für Osteosynthesefragen (AO 44B2.1)-type fractures on fracture detection, fixation material, and ankle joints. Then, the results were evaluated by modeling ligament rupture in 6 different ways.
Results: In the modeling where the deltoid and the talofibular ligament are broken together, instability is the highest in the ankle (2.31 mm) and fracture line (0.15 mm). In our study, the rupture of the tibiofibular anterior and posterior ligaments associated with syndesmosis caused less instability in the fracture and ankle than the single rupture models of both the deltoid and the talofibular ligament.
Conclusions: In the finite element modeling of AO 44B2.1-type fractures detected with plate, the importance and potential effects of often overlooked ankle ligaments are pointed out shown. It is important to keep in mind that when treating ankle injuries, the ankle should be treated as a whole, with both bone and soft tissue. In some cases, the fracture may represent the visible tip of the iceberg.
