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Advances in Periprosthetic Fractures of the Hip Joint
Published in K. Mohan Iyer, Hip Joint in Adults: Advances and Developments, 2018
Ali-Asgar Najefi, Arthur Galea, Nicholas Garlick, M. Zahid Saeed
There may be higher susceptibility to fracture in patients with secondary osteoarthritis related to developmental dysplasia of the hip (DDH) [7]. DDH leads to alterations in the hip anatomy that additionally result in functional changes, which are more prone to fracture [7]. The most important factors affecting the risk of fracture include increased neck-shaft angle (coxa valga) and antetorsion angle, stenosis of the medullary canal and shortening of the affected extremity. Because of the major deformity of the proximal femoral metaphysis, appropriate fixation of the stem is more difficult and can cause abnormal loads across the bone and consequently the fracture [29]. PFFs have also been found to occur more commonly in patients with a hip fracture prior to arthroplasty [7, 19]. Nonunion, delayed union or malunion, bone remodelling and, ultimately, limb malalignment are often seen in posttraumatic osteoarthritis. This condition leads to the formation of areas of higher loads during implant fixation and may result in a fracture [7]. Another important risk factor for PFF is the occurrence of areas of diminished mechanical properties, cortical perforations and bone defects that may occur after removal of implants used to stabilise the primary fracture or in the fracture line itself [7].
Management of clavicle shaft fractures with intramedullary devices: a narrative review
Published in Expert Review of Medical Devices, 2020
Paul Reginald King, Robert Patrick Lamberts
Eskola et al. demonstrated that malunion of a middle-third clavicle fracture with shortening of the clavicle may alter the position of the glenoid fossa which, in turn, may affect glenohumeral mobility and scapular rotation leading to unsatisfactory results and loss of function [25]. Lazarides and Zafiropoulos investigated 132 patients with united fractures of the clavicle shaft after they had received conservative treatment [26]. In their study, 25.8% of the patients were dissatisfied with their treatment result. Final clavicle shortening of more than 18 mm in males and 14 mm in females was associated with these unsatisfactory outcomes.
Design the femoral implant matched anatomical Ti64 implant and compare among lattice structures topology optimization and cylindrical pores
Published in Mechanics of Advanced Materials and Structures, 2023
Ebrahim Ahmed Ali Alkebsi, Abdallah Almutawakel, Toufik Outtas, Salim Lounansa, Rabia Selloum, Toufik Kanit
The motivation for this work is to reduce stress shielding on the virtue of complications that emerge from bone reintegration and anatomical mismatch. Consequently, the failure of the anatomical mismatch causes complications in bone reintegration [10], which are generally caused such as leg length discrepancy, nonunion, infection, malunion, and other complications [11].