title: Stress shielding in bone of a bone-cement interface.
abstract: Cementation is one of the main fixation methods used in joint replacement surgeries such as Total Knee Replacement (TKR). This work was prompted by a recent retrieval study, which shows losses up to 75% of the bone stock at the bone-cement interface ten years post TKR. It aims to examine the effects of cementation on the stress shielding of the interfacing bone, when the influence of an implant is removed. A micromechanics finite element study of a generic bone-cement interface is presented here, where bone elements in the partially and the fully interdigitated regions were evaluated under selected load cases. The results revealed significant stress shielding effect in the bone of all bone-cement interface regions, particularly in fully interdigitated region. This finding may be useful in the studies of implant fixation and other related orthopedic treatment strategies.
authors.affiliation: Mechanical Behaviour of Materials Laboratory, School of Engineering, University of Portsmouth, UK.
authors.forename: Qing-Hang
authors.initials: QH
authors.lastname: Zhang
authors.affiliation: Mechanical Behaviour of Materials Laboratory, School of Engineering, University of Portsmouth, UK ; Spires Portsmouth Hospital, UK.
authors.forename: Andrew
authors.initials: A
authors.lastname: Cossey
authors.affiliation: Mechanical Behaviour of Materials Laboratory, School of Engineering, University of Portsmouth, UK . Electronic address: jie.tong@port.ac.uk.
authors.forename: Jie
authors.initials: J
authors.lastname: Tong
mesh_terms: D000818:Animals; D001843:Bone Cements / Q000009:adverse effects*; D001842:Bone and Bones; D002417:Cattle; D020342:Finite Element Analysis; D019736:Prostheses and Implants / Q000009:adverse effects; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D001843:Bone Cements
keywords: Bone resorption; Bone-cement interface; Finite element analysis; Stress shielding