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556 results on '"Ferreira, Louis"'

2. Assessing Methodological Uncertainty of In-Vitro Digital Volume Correlation Bone Strain Measurements in Total Shoulder Arthroplasties

Author

Targosinski, Jakub, Kusins, Jonathan, Martensson, Nicole, Nelson, Andrew, Knowles, Nikolas, Ferreira, Louis, Tavares, João Manuel R. S., Series Editor, Jorge, Renato Natal, Series Editor, Cohen, Laurent, Editorial Board Member, Doblare, Manuel, Editorial Board Member, Frangi, Alejandro, Editorial Board Member, Garcia-Aznar, Jose Manuel, Editorial Board Member, Holzapfel, Gerhard A., Editorial Board Member, Hughes, Thomas J.R., Editorial Board Member, Kamm, Roger, Editorial Board Member, Li, Shuo, Editorial Board Member, Löhner, Rainald, Editorial Board Member, Nithiarasu, Perumal, Editorial Board Member, Oñate, Eugenio, Editorial Board Member, Perales, Francisco J., Editorial Board Member, Prendergast, Patrick J., Editorial Board Member, Tamma, Kumar K., Editorial Board Member, Vilas-Boas, Joao Paulo, Editorial Board Member, Weiss, Jeffrey, Editorial Board Member, Zhang, Yongjie Jessica, Editorial Board Member, Bourauel, Christoph, editor, Geris, Liesbet, editor, and Vander Slote, Jos, editor

Published
2023
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7. An in vitro study of glenoid implant peripheral peg interface mechanics during eccentric loading and lift‐off.

Author

Targosinski, Jakub, Kusins, Jonathan, Athwal, George, Nelson, Andrew, and Ferreira, Louis

Subjects
ECCENTRIC loads, CYCLIC loads, ARTHROPLASTY, MICROMECHANICS, IN vitro studies
Abstract

Glenoid implants used in anatomic total shoulder arthroplasties typically incorporate peripheral pegs as a design feature to support eccentric loads. These peripheral pegs and the implant‐cement‐bone interface undergo substantial cyclic tensile‐compressive loads during normal activity. Therefore, these pegs are of interest in translating the micromechanics of local implant fixation failure to the biomechanics of gross anatomic failure of the glenoid implant after total shoulder arthroplasty. This study used an in vitro peg‐cement‐bone construct which incorporated bone tissue acquired from osteoarthritic patients undergoing total shoulder arthroplasty. Strain distributions in the peripheral peg‐cement‐bone interfaces were analyzed under loading conditions emulating glenoid implant edge displacements. It was found that tensile strains in the interfaces were highest near the backside‐peg junction and were greater in magnitude than compressive strains. Notably, strains near the peg's fixation channels were relatively low. These results suggest that cracks may initiate around the peg near the backside and travel downward to cause broader fixation failure. [ABSTRACT FROM AUTHOR]

Published
2025
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