Detail publikace
Deformačně-napěťová analýza rekonstrukčních deskových implantátů dolní čelisti
NARRA, N. VALÁŠEK, J. HANNULA, M. MARCIÁN, P. SÁNDOR, G. HYTTINEN, J. WOLFF, J.
Český název
Deformačně-napěťová analýza rekonstrukčních deskových implantátů dolní čelisti
Anglický název
Finite element analysis of customized reconstruction plates for mandibular continuity defect therapy
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
Large mandibular continuity defects pose a significant challenge in oral maxillofacial surgery. One solution to this problem is to use computer-guided surgical planning and additive manufacturing technology to produce patient-specific reconstruction plates. However, when designing customised plates, it is important to assess potential biomechanical responses that may vary substantially depending on the size and geometry of the defect. The aim of this study was to assess the design of two customized plates using finite element method (FEM). These plates were designed for the reconstruction of the lower left mandibles of two ameloblastoma cases (patient1/plate1 and patient2/plate2) with large bone resections differing in both geometry and size. Simulations revealed maximum von Mises stresses of 63 MPa and 108 MPa in plates 1 and 2, and 65 MPa and 190 MPa in the fixation screws of patients 1 and 2. The von Mises strain induced in the bone at the screw-bone interface reached maximum values of 2739 micro-strain for patient 1 and 19575 micro-strain for patient 2. The results demonstrate the influence of design on the stresses induced in the plate and screw bodies. Of particular note, however, are the differences in the induced strains. Unphysiologically high strains in bone adjacent to screws can cause micro-damage leading to bone resorption. This can adversely affect the anchoring capabilities of the screws. Thus, while custom plates offer optimal anatomical fit, attention should be paid to the expected Physiological forces on the plates and the induced stresses and strains in the plate-screw-bone assembly.
Český abstrakt
Velké defekty dolní čelisti jsou velkým problémem v chirurgii čelistí. Jednou z možnsotí je tvorba implantátů z CT snímků. Cílem této práce je deformačně-napěťová analýza těchto implantátů.
Anglický abstrakt
Large mandibular continuity defects pose a significant challenge in oral maxillofacial surgery. One solution to this problem is to use computer-guided surgical planning and additive manufacturing technology to produce patient-specific reconstruction plates. However, when designing customised plates, it is important to assess potential biomechanical responses that may vary substantially depending on the size and geometry of the defect. The aim of this study was to assess the design of two customized plates using finite element method (FEM). These plates were designed for the reconstruction of the lower left mandibles of two ameloblastoma cases (patient1/plate1 and patient2/plate2) with large bone resections differing in both geometry and size. Simulations revealed maximum von Mises stresses of 63 MPa and 108 MPa in plates 1 and 2, and 65 MPa and 190 MPa in the fixation screws of patients 1 and 2. The von Mises strain induced in the bone at the screw-bone interface reached maximum values of 2739 micro-strain for patient 1 and 19575 micro-strain for patient 2. The results demonstrate the influence of design on the stresses induced in the plate and screw bodies. Of particular note, however, are the differences in the induced strains. Unphysiologically high strains in bone adjacent to screws can cause micro-damage leading to bone resorption. This can adversely affect the anchoring capabilities of the screws. Thus, while custom plates offer optimal anatomical fit, attention should be paid to the expected Physiological forces on the plates and the induced stresses and strains in the plate-screw-bone assembly.
Klíčová slova česky
deskové ipantáty; MKP; delní čelist; rapid prototyping; maxillofacialní chirurgie
Klíčová slova anglicky
reconstruction plate; finite element analysis; mandible reconstruction; rapid prototyping; maxillofacial surgery
Rok RIV
2014
Vydáno
03.01.2014
Nakladatel
ELSEVIER SCI LTD
Místo
ENGLAND, OXFORD
ISSN
0021-9290
Ročník
47
Číslo
1
Strany od–do
264–268
Počet stran
6
BIBTEX
@article{BUT102650,
author="Nathaniel {Narra} and Jiří {Valášek} and Markus {Hannula} and Petr {Marcián} and George {Sándor} and Jari {Hyttinen} and Jan {Wolff},
title="Finite element analysis of customized reconstruction plates for mandibular continuity defect therapy",
year="2014",
volume="47",
number="1",
month="January",
pages="264--268",
publisher="ELSEVIER SCI LTD",
address="ENGLAND, OXFORD",
issn="0021-9290"
}