Migration and strains induced by different designs of force-closed stems for THA

Subtle differences in stem design can result in different mechanical responses of the total hip arthroplasty. Tests measuring migration of the stem relative to the femur, as well as the strains in the cement mantle and on the femur can detect different mechanical behavior between stems. In this arti...

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Bibliographic Details
Published in:Revista brasileira de ortopedia 2015-11, Vol.50 (6), p.686-693
Main Authors: Griza, Sandro, Gomes, Luiz Sérgio Marcelino, Cervieri, André, Strohaecker, Telmo Roberto
Format: Article
Language:English
Subjects:
Artroplastia de quadril
Desenho de prótese
Fenômenos mecânicos
Hip arthroplasty
Mechanical phenomena
Original
ORTHOPEDICS
Prosthesis design
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Summary:Subtle differences in stem design can result in different mechanical responses of the total hip arthroplasty. Tests measuring migration of the stem relative to the femur, as well as the strains in the cement mantle and on the femur can detect different mechanical behavior between stems. In this article, conical, double and triple tapered stems were implanted in composite femurs and subjected to static and cyclic loads. Stems differed mainly on taper angle, calcar radius and proximal stiffness. Stem migration and strains on the femur and in the cement mantle were achieved. Significant differences (p
ISSN:2255-4971
1982-4378
2255-4971
DOI:10.1016/j.rboe.2015.09.003