Influence of the femoral offset on the muscles passive resistance in total hip arthroplasty

Stanisław Burzyński; Agnieszka Sabik; Wojciech Witkowski; Piotr Łuczkiewicz

doi:10.1371/journal.pone.0250397

Influence of the femoral offset on the muscles passive resistance in total hip arthroplasty

Abstract

Background Soft tissue tension is treated as a crucial factor influencing the post-THA dislocation. The femoral offset is regarded as one of the major parameters responsible for the stabilization of the prosthesis. It is unclear which soft tissue is mostly affected by the offset changes. Methods A finite element model of the hip was created. The model comprised muscles, bones, a stem, the acetabular component and a liner. The muscles were modelled as a Hill-type musculo-tendon nonlinear springs. Nonlinear analyses of the hip flexion and internal rotation were performed for the two values of the femoral stem offset. Results We observed that the quadratus femoris and gluteus medius produce the largest resisting moment opposing the external load excreted by the surgeon during the intraoperative hip dislocation test. Conclusions An increased femoral offset increases the stretching of the quadratus femoris muscle significantly and provides the growth of its initial passive force. This muscle serves as a stiff band, providing stabilisation of the hip prosthesis, measured during the simulated intraoperative test.

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Authors (4)

Stanisław Burzyński dr inż.
Agnieszka Sabik dr hab. inż.
Wojciech Witkowski prof. dr hab. inż.
Piotr Łuczkiewicz dr
- Gdański Uniwersytet Medyczny

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Category:: Articles
Type:: artykuły w czasopismach
Published in:: PLOS ONE no. 16,
ISSN: 1932-6203
Language:: English
Publication year:: 2021
Bibliographic description:: Burzyński S., Sabik A., Witkowski W., Łuczkiewicz P.: Influence of the femoral offset on the muscles passive resistance in total hip arthroplasty// PLOS ONE -Vol. 16,iss. 5 (2021), s.e0250397-
DOI:: Digital Object Identifier (open in new tab) 10.1371/journal.pone.0250397
Verified by:: Gdańsk University of Technology