title: Rapid identification of elastic modulus of the interface tissue on dental implants surfaces using reduced-basis method and a neural network.
abstract: This paper proposes a rapid inverse analysis approach based on the reduced-basis method (RBM) and neural network (NN) to identify the "unknown" elastic modulus (Young's modulus) of the interfacial tissue between a dental implant and the surrounding bones. In the present RBM-NN approach, a RBM model is first built to compute displacement responses of dental implant-bone structures subjected to a harmonic loading for a set of "assumed" Young's moduli. The RBM model is then used to train a NN model that is used for actual inverse analysis in real-time. Actual experimental measurements of displacement responses are fed into the trained NN model to inversely determine the "true" elastic modulus of the interfacial tissue. As an example, a physical model of dental implant-bone structure is built and inverse analysis is conducted to verify the present RBM-NN approach. Based on numerical simulation and actual experiments, it is confirmed that the identified results are very accurate, reliable, and the computational saving is very significant. The present RBM-NN approach is found robust and efficient for inverse material characterizations in noninvasive and/or nondestructive evaluations.
authors.affiliation: Centre for Advanced Computations in Engineering Science, Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore. g0402948@nus.edu.sg
authors.forename: Khin
authors.initials: K
authors.lastname: Zaw
authors.forename: G R
authors.initials: GR
authors.lastname: Liu
authors.forename: B
authors.initials: B
authors.lastname: Deng
authors.forename: K B C
authors.initials: KB
authors.lastname: Tan
mesh_terms: D000818:Animals; D002417:Cattle; D003198:Computer Simulation; D015921:Dental Implants; D055119:Elastic Modulus; D020342:Finite Element Analysis; D006801:Humans; D016571:Neural Networks, Computer; D013997:Time Factors
chemical_list: D015921:Dental Implants