1
|
Arun Raj AC, Roy S, Datta S. Informatics guided FE design of bioactive titanium alloy/composite multi-layered dental implants. Comput Methods Biomech Biomed Engin 2024; 27:431-442. [PMID: 37771233 DOI: 10.1080/10255842.2023.2263124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/17/2023] [Indexed: 09/30/2023]
Abstract
A dental implant with three distinct layers, of titanium alloy at core, porous titanium alloy at the intermediate layer and titanium alloy hydroxyapatite composite at the outer layer, is designed to achieve low elastic modulus and adequate strength with bioactive surface. Artificial Neural Network (ANN) along with Rule of Mixture (ROM) is used to generate the objective functions for the Genetic Algorithm (GA) based multi-objective optimization for achieving the optimal designs, which are validated using Finite Element Analysis (FEA) simulations. The composition and processing parameters are correlated with the yield strength and elastic modulus of titanium alloy using ANN. The ANN models are generated to express the strength and effective modulus of the implant using ROM. To determine the optimal composition of titanium alloys, porous layers, and composite layers for a three-layer dental implant, multi-objective genetic algorithm is employed. The Pareto optimal solutions provide the guidelines for designing the implant. A few selected non-dominated solutions are used for studying the actual stress distribution at the bone-implant interface using FEA, and showed significant improvements compared to conventional implants.
Collapse
Affiliation(s)
- A C Arun Raj
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India
| | - Sandipan Roy
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India
| | - Shubhabrata Datta
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India
| |
Collapse
|
2
|
Torres-Sanchez C, Alabort E, Wang J, Norrito M, Conway PP. In-silico design and experimental validation of TiNbTaZrMoSn to assess accuracy of mechanical and biocompatibility predictive models. J Mech Behav Biomed Mater 2021; 124:104858. [PMID: 34607297 DOI: 10.1016/j.jmbbm.2021.104858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 09/14/2021] [Accepted: 09/21/2021] [Indexed: 10/20/2022]
Abstract
Numerical design of TiNbTaZrMoSn alloy preceded its manufacture and mechanical, physico-chemical and in vitro characterisation. The specifications of the alloy required a multi-objective optimisation including lower modulus of elasticity than c.p.Ti, high strength, stabilised β crystal structure with a low martensitic start temperature, a narrow solidification range and high biocompatibility. The results reveal that there was a good match between the bulk mechanical properties exhibited by the alloy experimentally and those predicted. Regarding surface properties, independent of roughness effects, the oxide thickness and surface zeta-potential, measured in biologically relevant electrolytes and at physiological pH, arose as important factors in osteoblastic activity (i.e., cell proliferation, measured via DNA, protein and metabolite content, and differentiation, via ALP levels), but not in cell adhesion and viability. The thinner oxide layer and lower absolute value of surface zeta-potential on the TiNbTaZrMoSn alloy explain its lesser osteogenic properties (i.e., inhibition of ALP activity) compared to the c.p. Ti. This study demonstrates that the numerical models to predict microstructure and bulk mechanical properties of β-Ti alloys are robust, but that the prediction of cellular bioactivity lags behind and still requires parameterisation to account for features such as oxide layer composition and thickness, electro-chemical properties and surface charge, and topography to optimise cell response in silico before committing to the costly manufacture and deployment of these alloys in regenerative medicine.
Collapse
Affiliation(s)
- C Torres-Sanchez
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3PE, UK.
| | - E Alabort
- Alloyed Ltd, Unit 15, Oxford Industrial Park, Yarnton, OX5 1QU, UK
| | - J Wang
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3PE, UK
| | - M Norrito
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3PE, UK
| | - P P Conway
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3PE, UK
| |
Collapse
|
3
|
Vasilevich A, Carlier A, Winkler DA, Singh S, de Boer J. Evolutionary design of optimal surface topographies for biomaterials. Sci Rep 2020; 10:22160. [PMID: 33335124 PMCID: PMC7746696 DOI: 10.1038/s41598-020-78777-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 11/30/2020] [Indexed: 02/03/2023] Open
Abstract
Natural evolution tackles optimization by producing many genetic variants and exposing these variants to selective pressure, resulting in the survival of the fittest. We use high throughput screening of large libraries of materials with differing surface topographies to probe the interactions of implantable device coatings with cells and tissues. However, the vast size of possible parameter design space precludes a brute force approach to screening all topographical possibilities. Here, we took inspiration from Nature to optimize materials surface topographies using evolutionary algorithms. We show that successive cycles of material design, production, fitness assessment, selection, and mutation results in optimization of biomaterials designs. Starting from a small selection of topographically designed surfaces that upregulate expression of an osteogenic marker, we used genetic crossover and random mutagenesis to generate new generations of topographies.
Collapse
Affiliation(s)
- Aliaksei Vasilevich
- Institute for Complex Molecular Systems and Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Aurélie Carlier
- MERLN Institute for Technology-Inspired Regenerative Medicine, Department of Cell Biology-Inspired Tissue Engineering, Maastricht University, Maastricht, The Netherlands
| | - David A Winkler
- Materials Science & Engineering, Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC, Australia.,Monash Institute of Pharmaceutical Sciences, Monash Univeristy, Parkville, VIC, Australia.,Latrobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia.,School of Pharmacy, University of Nottingham, Nottingham Park, UK
| | - Shantanu Singh
- Imaging Platform, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Jan de Boer
- Institute for Complex Molecular Systems and Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.
| |
Collapse
|
4
|
Ou P, Liu J, Hao C, He R, Chang L, Ruan J. Cytocompatibility, stability and osteogenic activity of powder metallurgy Ta-xZr alloys as dental implant materials. J Biomater Appl 2020; 35:790-798. [PMID: 32854569 DOI: 10.1177/0885328220948033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Tantalum (Ta) and zirconium (Zr) alloys were found to had low elastic modulus and similar biomechanical characteristics as the human bone. However, the biocompatibility and osteogenic potential of Ta-xZr alloyswith different proportions (20, 30, 40 and 50% Zr by atom) remains to be investigated. In this study, the biocompatibility of Ta-xZr alloys and commercially pure titanium (cpTi) was evaluated in vitro by cell counting kit-8 assay. The adhesion of MG63 osteoblasts to the surface of the alloys was observed by fluorescence microscopy, and their morphology was analyzed by scanning electron microscopy (SEM). The expressions of alkaline phosphatase (ALP), Ki67, osteocalcin (OC), collagen-I (Col-I) and Integrin β1 mRNA in the cultured cells were determined by RT-PCR. As a result, Ta-xZr (x = 20, 30, 40 and 50 at%) alloys were non-toxic and supported proliferation of the MG63 cells. The osteoblasts adhered to the Ta-xZr alloys, and subsequently spread and proliferated rapidly. Furthermore, the cells grown on Ta-20Zr and Ta-30Zr expressed high levels of ALP, Col I and OC, indicating that the Ta-xZr alloys can induce osteogenesis. In conclusion, Ta-xZr alloys promoted the adhesion, proliferation and osteogenic differentiation of MG63 cells. The Ta-xZr composites with a higher proportion of Ta exhibited superior osteogenic activity, and Ta-30Zr is therefore a promising alternative for Ti implants.
Collapse
Affiliation(s)
- Pinghua Ou
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, PR China.,Department of Stomatology, The Third Xiangya Hospital Central South University, Changsha, PR China
| | - Jue Liu
- Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha, PR China
| | - Cong Hao
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, PR China
| | - Rengui He
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, PR China
| | - Lin Chang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, PR China
| | - Jianming Ruan
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, PR China
| |
Collapse
|
5
|
Effects of Solution Treating on Microstructural and Mechanical Properties of a Heavily Deformed New Biocompatible Ti–Nb–Zr–Fe Alloy. METALS 2018. [DOI: 10.3390/met8050297] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
6
|
Roy S, Dey S, Khutia N, Roy Chowdhury A, Datta S. Design of patient specific dental implant using FE analysis and computational intelligence techniques. Appl Soft Comput 2018. [DOI: 10.1016/j.asoc.2018.01.025] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
7
|
Asserghine A, Filotás D, Nagy L, Nagy G. Scanning electrochemical microscopy investigation of the rate of formation of a passivating TiO 2 layer on a Ti G4 dental implant. Electrochem commun 2017. [DOI: 10.1016/j.elecom.2017.08.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
8
|
Is there scientific evidence favoring the substitution of commercially pure titanium with titanium alloys for the manufacture of dental implants? MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:1201-1215. [DOI: 10.1016/j.msec.2016.10.025] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 10/07/2016] [Accepted: 10/16/2016] [Indexed: 11/22/2022]
|