Nanohybrid scratch resistant coatings for teeth and bone viscoelasticity manifested in tribology

Agustín de la IslaLaboratory of Advanced Polymers and Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, PO Box 305310, Denton, TX76203-5310, USA, e-mail: [email protected];Doctorado en Ciencia e Ingenieria de Materiales, Universidad Autonoma del Estado de Morelos, Cuernavaca, Morelos, Mexico;Licenciatura en Odontologia, Facultad de Medicina, Universidad Autonoma de Queretaro, Clavel 200 Prados de la Capilla, Queretaro, Qro., Mexico

Witold BrostowLaboratory of Advanced Polymers and Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, PO Box 305310, Denton, TX76203-5310, USA, e-mail: [email protected];Centro de Fisica Aplicada y Tecnologia Avanzada (CFATA), Universidad Nacional Autonoma de México, Apartado Postal 1–1010, Queretaro, Qro. 76000, Mexico

Bernard BujardLaboratory of Advanced Polymers and Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, PO Box 305310, Denton, TX76203-5310, USA, e-mail: [email protected]

Miriam EstevezCentro de Fisica Aplicada y Tecnologia Avanzada (CFATA), Universidad Nacional Autonoma de México, Apartado Postal 1–1010, Queretaro, Qro. 76000, Mexico

J. Rogelio RodriguezCentro de Fisica Aplicada y Tecnologia Avanzada (CFATA), Universidad Nacional Autonoma de México, Apartado Postal 1–1010, Queretaro, Qro. 76000, Mexico

Susana VargasCentro de Fisica Aplicada y Tecnologia Avanzada (CFATA), Universidad Nacional Autonoma de México, Apartado Postal 1–1010, Queretaro, Qro. 76000, Mexico

Victor M. CastañoLaboratory of Advanced Polymers and Optimized Materials (LAPOM), Department of Materials Science & Engineering, University of North Texas, PO Box 305310, Denton, TX76203-5310, USA, e-mail: [email protected];Centro de Fisica Aplicada y Tecnologia Avanzada (CFATA), Universidad Nacional Autonoma de México, Apartado Postal 1–1010, Queretaro, Qro. 76000, Mexico

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Abstract

We cover teeth surfaces with nanohybrid coatings containing an inorganic ceramic and an organic copolymer constituents. We report the first ever values of scratch penetration depth and scratch recovery for bare and coated teeth. We find that uncoated teeth undergo viscoelastic recovery (healing) after microscratching—the first manifestation of bone viscoelasticity in tribology. The coatings fill “valleys” in teeth surfaces. In each case a large improvement in the scratch resistance as compared to uncoated teeth is seen. The extent of the improvement depends on the inorganic/organic component ratios in the nanohybrids.

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Nanohybrid scratch resistant coatings for teeth and bone viscoelasticity manifested in tribology

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Nanohybrid scratch resistant coatings for teeth and bone viscoelasticity manifested in tribology

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