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Influence of Er:YAG laser irradiation on surface properties of Ti-6Al-4V machined and hydroxyapatite coated

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Abstract

Surface treatment by laser irradiation can change the topography of titanium; however, little is known about the changes it causes when applied to other coatings. This study aimed to evaluate the influence of Er:YAG laser irradiation on the surface properties of titanium-aluminum-vanadium (Ti-6Al-4V) discs. Four Ti-6Al-4V surfaces were evaluated (n = 10): CON—control, machined without surface treatment; LT—machined + laser treatment; HA—hydroxyapatite coating; and LT-HA—hydroxyapatite coating + laser treatment. For the laser treatment, an Er:YAG laser with a wavelength of 2940 nm, a frequency of 10 Hz, and an energy density of 12.8 J/cm2 was used. The morphology of the coating was investigated by scanning electron microscopy and the surface composition by energy-dispersive X-ray spectroscopy. The influence of laser irradiation treatment on roughness and wettability was also evaluated. The Er:YAG laser promoted a significant reduction in the roughness Sa (p < 0.05) and in the contact angle (p = 0.002) of the LT surface compared to the CON surface. On the LT-HA surface, a significant decrease in roughness was observed only for the Rz parameter (p = 0.015) and an increase in the contact angle (p < 0.001) compared to the HA surface. The use of the Er:YAG laser with the evaluated parameters decreased the surface roughness and improved the wetting capacity of machined without surface treatment. In the group with hydroxyapatite coating, the laser influenced the surface roughness only for the parameter Rz and reduced their wetting capacity.

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Funding

This work was supported by FAPESP—Foundation for Research Support of the State of São Paulo (grant number 2019/09213-3).

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Authors and Affiliations

  1. Ribeirão Preto Dental School, University of São Paulo, (USP), Ribeirão Preto, São Paulo, Brazil

    Isadora Gazott Simões

  2. Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, (USP), Ribeirão Preto, São Paulo, Brazil

    Simone Kreve

  3. Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, (USP), Ribeirão Preto, São Paulo, Brazil

    Marcos Antônio Eufrásio Cruz

  4. Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, (USP), Ribeirão Preto, São Paulo, Brazil

    André Luís Botelho

  5. Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, (USP), Ribeirão Preto, São Paulo, Brazil

    Ana Paula Ramos

  6. Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, (USP), Ribeirão Preto, São Paulo, Brazil

    Andréa Cândido dos Reis

  7. Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, (USP), Ribeirão Preto, São Paulo, Brazil

    Mariana Lima da Costa Valente

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  1. Isadora Gazott Simões
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Contributions

Isadora Gazott Simões: conceptualization, investigation, methodology, validation, investigation, resources, data curation, writing—original draft, writing—review and editing, funding acquisition. Simone Kreve: methodology. Marcos Antônio Eufrásio Cruz: methodology. André Luís Botelho: methodology, writing—original draft. Ana Paula Ramos: methodology, resources. Andrea Candido dos Reis: term, conceptualization, methodology, resources, writing—review and editing, supervision. Mariana Lima da Costa Valente: term, conceptualization, investigation, methodology, formal analysis, resources, data curation, supervision, writing—original draft, writing—review and editing, project administration, funding acquisition.

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Simões, I.G., Kreve, S., Cruz, M.A.E. et al. Influence of Er:YAG laser irradiation on surface properties of Ti-6Al-4V machined and hydroxyapatite coated. Lasers Med Sci 38, 48 (2023). https://doi.org/10.1007/s10103-023-03719-z

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