Detail publikace

Finite element analysis of customized reconstruction plates for mandibular continuity defect therapy

NARRA, N. VALÁŠEK, J. HANNULA, M. MARCIÁN, P. SÁNDOR, G. HYTTINEN, J. WOLFF, J.

Originální název

Finite element analysis of customized reconstruction plates for mandibular continuity defect therapy

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

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.

Klíčová slova

reconstruction plate; finite element analysis; mandible reconstruction; rapid prototyping; maxillofacial surgery

Autoři

NARRA, N.; VALÁŠEK, J.; HANNULA, M.; MARCIÁN, P.; SÁNDOR, G.; HYTTINEN, J.; WOLFF, J.

Rok RIV

2014

Vydáno

3. 1. 2014

Nakladatel

ELSEVIER SCI LTD

Místo

ENGLAND, OXFORD

ISSN

0021-9290

Periodikum

JOURNAL OF BIOMECHANICS

Ročník

47

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

264

Strany do

268

Strany počet

6

URL

http://www.sciencedirect.com/science/article/pii/S002192901300568X

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",
  journal="JOURNAL OF BIOMECHANICS",
  year="2014",
  volume="47",
  number="1",
  pages="264--268",
  doi="10.1016/j.jbiomech.2013.11.016",
  issn="0021-9290",
  url="http://www.sciencedirect.com/science/article/pii/S002192901300568X"
}