On the wear mechanism of human dental enamel |
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| Authors: | J.A. Arsecularatne M. Hoffman |
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| Affiliation: | 1. Departamento de Ingeniería Mecánica, Energética y de los Materiales, Universidad de Extremadura, 06006 Badajoz, Spain;2. Department of Biology, Saint Michael''s College, Colchester, VT 05439, USA;3. Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;1. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China;2. Department of Materials Science and Engineering, University of Washington Seattle, WA, USA;3. Department of Restorative Dentistry, Dental School, University of Washington Seattle, WA, USA;1. School of Mechanical and Manufacturing Engineering, UNSW Sydney?, Sydney, NSW 2052, Australia;2. School of Materials Science and Engineering, UNSW Sydney?, Sydney, NSW 2052, Australia;3. Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil;1. Departamento de Ingeniería Mecánica, Energética y de los Materiales, Universidad de Extremadura, 06006 Badajoz, Spain;2. Department of Biology, Saint Michaels College, Colchester, VT 05439, USA;3. Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;1. Departamento de Ingeniería Mecánica, Energética y de los Materiales, Universidad de Extremadura, 06006, Badajoz, Spain;2. Valencia Nanophotonics Technology Center (NTC), Universitat Politècnica de València, Camí de Vera, s/n, 46022, Valencia, Spain |
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| Abstract: | The mechanisms and controlling factors in human enamel wear are not fully understood yet. To address this problem, we have used focused ion beam (FIB) milling and field emission scanning electron microscopy (FESEM) to investigate the processes taking place below the wear surface of enamel specimens from in vitro wear tests. These reveal the generation of subsurface cracks during wear of enamel. An analysis of published qualitative and quantitative experimental wear results for enamel as well as for ceramics shows the similarities of the wear processes taking place under similar contact conditions, despite the differences that exist between these two materials. It is shown that, for the considered conditions, fracture under elastic contact is responsible for enamel wear. |
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