title: Biomechanical study of the tibia in knee replacement revision.
abstract: The best management of severe bone defects following total knee replacement is still controversial. Metal augments, tantalum cones and porous tibial sleeves could help the surgeon to manage any type of bone loss, providing a stable and durable knee joint reconstruction. Five different types of prostheses have been analysed: one prosthesis with straight stem; two prostheses with offset stem, with and without supplement, and two prostheses with sleeves, with and without stem. The purpose of this study is to report a finite element study of revision knee tibial implants. The main objective was to analyse the tibial bone density changes and Von Misses tension changes following different tibial implant designs. In all cases, the bone density decreases in the proximal epiphysis and medullary channels, with a bone density increase also being predicted in the diaphysis and at the bone around the stems tips. The highest value of Von Misses stress has been obtained for the straight tibial stem, and the lowest for the stemless metaphyseal sleeves prosthesis.
authors: Investigación, Universidad de Zaragoza, Zaragoza, España.
authors: M P
authors: MP
authors: Quílez
authors: Departamento de Ingeniería Mecánica, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza, España.
authors: M A
authors: MA
authors: Pérez
authors: Instituto de Investigación Sanitaria de Aragón (IIS), Servicio de Traumatología y Cirugía Ortopédica, Hospital Clínico Universitario, Zaragoza, España. Electronic address: seralbelen@gmail.com.
authors: B
authors: B
authors: Seral-García
mesh_terms: D000328:Adult; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D001696:Biomechanical Phenomena; D015519:Bone Density; D016723:Bone Remodeling; D003198:Computer Simulation; D020342:Finite Element Analysis; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008954:Models, Biological; D011474:Prosthesis Design; D013977:Tibia / Q000502:physiology*; D016474:Weight-Bearing
keywords: Bone resorption; Elementos finitos; Finite element; Metaphyseal sleeves; Reabsorción ósea; Recambio de prótesis de rodilla; Revision total knee arthroplasty; Stems; Vainas metafisarias; Vástagos