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Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study

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Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study. / Ridwan-Pramana, Angela; Marcian, Petr; Borak, Libor; Narra, Nathaniel; Forouzanfar, Tim; Wolff, Jan.

julkaisussa: Journal of Cranio-Maxillofacial Surgery, Vuosikerta 44, Nro 1, 2015, s. 34-44.

Tutkimustuotosvertaisarvioitu

Harvard

Ridwan-Pramana, A, Marcian, P, Borak, L, Narra, N, Forouzanfar, T & Wolff, J 2015, 'Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study', Journal of Cranio-Maxillofacial Surgery, Vuosikerta. 44, Nro 1, Sivut 34-44. https://doi.org/10.1016/j.jcms.2015.10.014

APA

Ridwan-Pramana, A., Marcian, P., Borak, L., Narra, N., Forouzanfar, T., & Wolff, J. (2015). Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study. Journal of Cranio-Maxillofacial Surgery, 44(1), 34-44. https://doi.org/10.1016/j.jcms.2015.10.014

Vancouver

Ridwan-Pramana A, Marcian P, Borak L, Narra N, Forouzanfar T, Wolff J. Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study. Journal of Cranio-Maxillofacial Surgery. 2015;44(1):34-44. https://doi.org/10.1016/j.jcms.2015.10.014

Author

Ridwan-Pramana, Angela ; Marcian, Petr ; Borak, Libor ; Narra, Nathaniel ; Forouzanfar, Tim ; Wolff, Jan. / Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study. Julkaisussa: Journal of Cranio-Maxillofacial Surgery. 2015 ; Vuosikerta 44, Nro 1. Sivut 34-44.

Bibtex - Lataa

@article{e81449a1bf3849d29824353df4886a59,
title = "Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study",
abstract = "This computational study investigates the effect of shape (defect contour curvature) and bone-implant interface (osteotomy angle) on the stress distribution within PMMA skull implants. Using finite element methodology, 15 configurations - combinations of simplified synthetic geometric shapes (circular, square, triangular, irregular) and interface angulations - were simulated under 50N static loads. Furthermore, the implant fixation devices were modelled and analysed in detail. Negative osteotomy configurations demonstrated the largest stresses in the implant (275 MPa), fixation devices (1258 MPa) and bone strains (0.04). The circular implant with zero and positive osteotomy performed well with maximum observed magnitudes of - implant stress (1.2 MPa and 1.2 MPa), fixation device stress (11.2 MPa and 2.2 MPa), bone strain (0.218e-3 and 0.750e-4). The results suggest that the preparation of defect sites is a critical procedure. Of the greatest importance is the angle at which the edges of the defect are sawed. If under an external load, the implant has no support from the interface and the stresses are transferred to the fixation devices. This can endanger their material integrity and lead to unphysiological strains in the adjacent bone, potentially compromising the bone morphology required for anchoring. These factors can ultimately weaken the stability of the entire implant assembly. (C) 2015 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.",
author = "Angela Ridwan-Pramana and Petr Marcian and Libor Borak and Nathaniel Narra and Tim Forouzanfar and Jan Wolff",
year = "2015",
doi = "10.1016/j.jcms.2015.10.014",
language = "English",
volume = "44",
pages = "34--44",
journal = "Journal of Cranio-Maxillofacial Surgery",
issn = "1010-5182",
publisher = "Elsevier",
number = "1",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Structural and mechanical implications of PMMA implant shape and interface geometry in cranioplasty – a finite element study

AU - Ridwan-Pramana, Angela

AU - Marcian, Petr

AU - Borak, Libor

AU - Narra, Nathaniel

AU - Forouzanfar, Tim

AU - Wolff, Jan

PY - 2015

Y1 - 2015

N2 - This computational study investigates the effect of shape (defect contour curvature) and bone-implant interface (osteotomy angle) on the stress distribution within PMMA skull implants. Using finite element methodology, 15 configurations - combinations of simplified synthetic geometric shapes (circular, square, triangular, irregular) and interface angulations - were simulated under 50N static loads. Furthermore, the implant fixation devices were modelled and analysed in detail. Negative osteotomy configurations demonstrated the largest stresses in the implant (275 MPa), fixation devices (1258 MPa) and bone strains (0.04). The circular implant with zero and positive osteotomy performed well with maximum observed magnitudes of - implant stress (1.2 MPa and 1.2 MPa), fixation device stress (11.2 MPa and 2.2 MPa), bone strain (0.218e-3 and 0.750e-4). The results suggest that the preparation of defect sites is a critical procedure. Of the greatest importance is the angle at which the edges of the defect are sawed. If under an external load, the implant has no support from the interface and the stresses are transferred to the fixation devices. This can endanger their material integrity and lead to unphysiological strains in the adjacent bone, potentially compromising the bone morphology required for anchoring. These factors can ultimately weaken the stability of the entire implant assembly. (C) 2015 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

AB - This computational study investigates the effect of shape (defect contour curvature) and bone-implant interface (osteotomy angle) on the stress distribution within PMMA skull implants. Using finite element methodology, 15 configurations - combinations of simplified synthetic geometric shapes (circular, square, triangular, irregular) and interface angulations - were simulated under 50N static loads. Furthermore, the implant fixation devices were modelled and analysed in detail. Negative osteotomy configurations demonstrated the largest stresses in the implant (275 MPa), fixation devices (1258 MPa) and bone strains (0.04). The circular implant with zero and positive osteotomy performed well with maximum observed magnitudes of - implant stress (1.2 MPa and 1.2 MPa), fixation device stress (11.2 MPa and 2.2 MPa), bone strain (0.218e-3 and 0.750e-4). The results suggest that the preparation of defect sites is a critical procedure. Of the greatest importance is the angle at which the edges of the defect are sawed. If under an external load, the implant has no support from the interface and the stresses are transferred to the fixation devices. This can endanger their material integrity and lead to unphysiological strains in the adjacent bone, potentially compromising the bone morphology required for anchoring. These factors can ultimately weaken the stability of the entire implant assembly. (C) 2015 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

U2 - 10.1016/j.jcms.2015.10.014

DO - 10.1016/j.jcms.2015.10.014

M3 - Article

VL - 44

SP - 34

EP - 44

JO - Journal of Cranio-Maxillofacial Surgery

JF - Journal of Cranio-Maxillofacial Surgery

SN - 1010-5182

IS - 1

ER -