The Influence of peg designs on glenoid component: A finite element study
نویسندگان
چکیده
Glenoid loosening was associated with stress at the implant and cement. The purpose of this study was to determine the effect of pegs and its distribution on stress transfer to the implant and cement. Six commercially available implant designs were simulated via finite element analysis with different peg distributions. Maximum stress at the implant and cement and stress critical area (SCA) at the cement were obtained. Partially cemented implants had the ability to reduce the stress at the implant and cement by adding more fins at the central peg.
منابع مشابه
Comparison of Asymmetric Reaming versus a Posteriorly Augmented Component for Posterior Glenoid Wear and Retroversion: A Radiographic Study
Background: Managing posterior glenoid wear and retroversion remains a challenge in shoulder arthroplasty.Correcting glenoid version through asymmetric reaming (AR) with placement of a standard glenoid component and theuse of posteriorly augmented glenoid (PAG) components are two methods used to address this problem. Our objectiveis to report the radiographic outcomes of patie...
متن کاملStress analysis of glenoid component designs for shoulder arthroplasty.
Secure and lasting fixation of the glenoid component in total shoulder arthroplasty is difficult because there is an insufficient volume of strong bone in the scapula. Consequently, radiolucencies of the glenoid component are common (much more common than radiolucencies of the humeral component). Early glenoid component designs were fabricated wholly from polyethylene, were fixated with PMMA ce...
متن کاملFinite element analysis and physiologic testing of a novel, inset glenoid fixation technique.
HYPOTHESIS The success of shoulder arthroplasty surgery has been limited by a common complication: glenoid implant loosening. Eccentric loading of the glenoid due to migration of the humeral head is considered to be the major cause of glenoid loosening and is referred to as the rocking-horse phenomenon. Glenoid implant loosening may cause pain, limitation of function, and the need for complicat...
متن کاملThe axisymmetric computational study of a femoral component to analysis the effect of titanium alloy and diameter variation.
This work presents a numerical approach in order to predict the influence of implant material stiffness in a femoral component design when submitted in compression. The implant success depends on the transferred load to the neighboring bone. The finite element method can be used to analysis the stress and strain distribution in the femoral component allowing to improve the implant selection. Fo...
متن کاملThe Failure Mechanism of Cemented Glenoid Designs: An In-Vitro and Finite Element Study
Introduction: The problem of glenoid loosening in total shoulder replacement (TSA) is not a new one. Surprisingly, it is still not clear which part of the fixation fails and where this failure initiates. Published works have used FE modelling, radiographs and in-vitro tests to assess the superiority of implants and design features [1,2,3,4,5]. All studies thus far have been unable to observe or...
متن کامل