Failure location prediction by finite element analysis for an additive manufactured mandible implant

• Published in: Medical engineering & physics Vol. 37; no. 9; pp. 862 - 869
• Main Authors: Huo, Jinxing, Dérand, Per, Rännar, Lars-Erik, Hirsch, Jan-Michaél, Gamstedt, E. Kristofer
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.09.2015
• Subjects: Aged; Alloys; Bite Force; Bone Substitutes; Computed tomography; Computer Simulation; Equipment Failure Analysis - methods; Failure; Feasibility Studies; Finite Element Analysis; Finite element simulations; Homogenisation; Humans; Imaging, Three-Dimensional; Male; Mandible - diagnostic imaging; Mandible - physiopathology; Mandible - surgery; Mandible implant; Mandibular Neoplasms - diagnostic imaging; Mandibular Neoplasms - physiopathology; Mandibular Neoplasms - surgery; Mastication - physiology; Masticatory Muscles - physiopathology; Models, Biological; Porosity; Prosthesis Failure; Radiology; Stress, Mechanical; Tissue Scaffolds; Titanium; Tomography, X-Ray Computed; Mandible implant; Finite element simulations; Computed tomography; Failure; Homogenisation
• ISSN: 1350-4533; 1873-4030
• DOI: 10.1016/j.medengphy.2015.06.001

Highlights • An accurate three-dimensional geometrical computer model of a human mandible was constructed from computed-tomography images. • Stress analysis in the mandible implant was performed by way of finite element simulations, with the geometrically characterized mandible and implant subjected to realistic muscular forces. • The location of implant failure correlated with the location of the highest stress concentration predicted by the numerical simulations. • Additive manufacturing, patient computed tomography and finite element simulations provide possibilities of significantly improved patient-specific design of implants of high structural integrity.