![]() ![]() ![]() The aforementioned morphological parameters in fractures with zone III, sharp spikes, and further broken spikes were greater than those in zone II, blunt spikes, and fractures without further broken spikes. Altogether, 43% (49 cases) of fracture apexes were not distributed on the posterolateral surface of the fibula, as 34.2% (39 cases) were located on the posterior ridge (zone III). The proximal end-tip location of the fracture apex was classified into four zones in the circumferential cortex: zone I (lateral ridge) in seven cases (6.1%), zone II (posterolateral surface) in 65 cases (57%), zone III (posterior ridge) in 39 cases (34.2%), and zone IV (medial surface) in three cases (2.6%). The fracture line inclination angle was 56.85° ± 9.58°, and the total fracture spiral angle was 269.81° ± 37.09°, with fracture spikes of 156.20° ± 24.04°. As measured from the distal tibial articular line, the fracture started at −6.22 ± 4.62 mm anteriorly and terminated at 27.23 ± 12.32 mm posteriorly, and the average fracture height was 33.45 ± 11.89 mm. All the type B lateral malleolar fractures demonstrated a spiral or oblique fracture line. Results: Among these 114 cases, 21 were isolated lateral malleolar fractures, 29 were bimalleolar fractures, and 64 were trimalleolar fractures. All the fracture lines were superimposed on a template fibula to generate a 3D fracture line map. We measured the morphological characteristics and the end-tip location of the fracture apex on the 3D model. The baseline data were collected, and computed tomography data were reconstructed in a 3D model. Methods: A total of 114 surgically treated cases of type B lateral malleolar fractures were retrospectively reviewed. Objective: We aimed to describe the morphological characteristics of Danis–Weber type B lateral malleolar fractures, with special attention given to the end-tip locations of fracture apexes, and to construct a 3D (three-dimensional) fracture line map. 2Department of Orthopedic Trauma, Ningbo No.1Department of Orthopedic Surgery, Yangpu Hospital, School of Medicine, Tongji University, Shanghai, China.Type A fractures are usually stable and can be managed with simple measures, such as a plaster of paris cast. They are inherently unstable and are more likely to require operative repair to achieve a good outcome. medial malleolus fracture or deltoid ligament injury presentĬategories B and C imply a degree of damage to the syndesmosis itself (which cannot be directly visualised on X-ray).tibiofibular syndesmosis disrupted with widening of the distal tibiofibular articulation.medial malleolus may be fractured or deltoid ligament may be tornįracture of the fibula proximal to the syndesmosis.tibiofibular syndesmosis intact or only partially torn, but no widening of the distal tibiofibular articulation.at the level of the ankle joint, extending superiorly and laterally up the fibula.usually stable: occasionally nonetheless requires an open reduction and internal fixation (ORIF) particularly if medial malleolus fracturedįracture of the fibula at the level of the syndesmosis.medial malleolus occasionally fractured.It has three categories: Type Aįracture of the fibula distal to the syndesmosis (the connection between the distal ends of the tibia and fibula). ![]() The Danis–Weber classification (often known just as the Weber classification) is a method of describing ankle fractures. Method to classify an ankle fracture Danis–Weber classification of ankle fractures (Types A, B and C) Danis–Weber classification on X-ray. ![]()
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