Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties

Tetragonal zirconia polycrystal stabilized with 3% mol of yttria (3Y-TZP) is a ceramic material frequently used to replace traditional titanium dental implants given to its high flexural strength, biocompatibility, and aesthetic advantage. Additionally, it is demonstrated that surface topographical...

Descripción completa

Detalles Bibliográficos
Autor: Gouth Gouth, Thomas
Tipo de recurso: tesis de maestría
Fecha de publicación:2023
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/386216
Acceso en línea:https://hdl.handle.net/2117/386216
Access Level:acceso abierto
Palabra clave:Zirconium
Implant dentures
Zirconia
Biomaterial
Laser patterning
Etching
roughness
Mechanical properties
Zirconi
Implants dentals
Àrees temàtiques de la UPC::Enginyeria dels materials
id ES_5b8a0fcbde4833a7cf869bd9e1279f39
oai_identifier_str oai:upcommons.upc.edu:2117/386216
network_acronym_str ES
network_name_str España
repository_id_str
spelling Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical propertiesGouth Gouth, ThomasZirconiumImplant denturesZirconiaBiomaterialLaser patterningEtchingroughnessMechanical propertiesZirconiImplants dentalsÀrees temàtiques de la UPC::Enginyeria dels materialsTetragonal zirconia polycrystal stabilized with 3% mol of yttria (3Y-TZP) is a ceramic material frequently used to replace traditional titanium dental implants given to its high flexural strength, biocompatibility, and aesthetic advantage. Additionally, it is demonstrated that surface topographical modification of zirconia at micro- and nano-scale levels encourages osseointegration and cell response, two crucial factors for successful dental implantation. Among the available treatments, hydrofluoric acid (HF) etching and laser patterning are two effective methods for roughening zirconia surfaces without severely damaging the surface implant. In fact, the main benefit of laser treatment over alternative methods is the ability to engrave precise structures on the material's surface in addition to producing microtopography. Subsequently, chemical etching produces homogeneous nanoscale roughness. The aim of this master’s thesis was to investigate the influence of the combination of laser patterning and acid etching on the psychochemical properties, microstructure and mechanical reliability of yttriastabilized zirconia for dental application. Zirconia discs were prepared by cold isostatic pressing and sintered at 1450ºC. Then, the samples underwent a surface modification using a nanosecond laser. The topographical pattern consisted on parallel grooves with a periodicity of 50 µm. Afterwards, half of the laser-structured samples were subjected to chemical etching using a hydrofluoric acid solution (40% HF for one hour). Mirror-like polished, only etched and only lasered surface specimens were used for the comparison with laser and etched samples. The topography of the specimens was characterized by means of confocal laser scanning microscopy (LSCM), contact profilometer, and scanning electron microscopy (SEM). Microstructural changes and the wettability of the samples were evaluated by Xray diffraction (XRD) and contact angle measurement, respectively. Furthermore, ball-on-three-balls (B3B) test was performed in order to characterize the mechanical properties of the samples. Results showed that the laser treatment was able to engrave well-defined and repeatable groove structures on the surface of 3Y-TZP, but side effects were generated such as pileup and microcracks. Furthermore, the pileup structures were eliminated and a nano-topography was generated by applying a chemical etching after the laser patterning. In terms of the microstructure analysis, the volume of monoclinic phase was found to be insignificant under every circumstance. Therefore, the treatments do not affect the stability of zirconia. Besides, the mechanical test revealed that the mean flexural strength was preserved on the chemically etched samples, but it decreased when laser treatment and laser treatment combined with etching were performed. Lastly, etched surfaces exhibited a lower contact angle.IncomingUniversitat Politècnica de CatalunyaGarcía de Albéniz López de Aberasturi, NereaMas Moruno, Carlos20232023-02-0920232023-04-14master thesishttp://purl.org/coar/resource_type/c_bdccNAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/masterThesisapplication/pdfhttps://hdl.handle.net/2117/386216reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-ShareAlike 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3862162026-05-27T15:37:01Z
dc.title.none.fl_str_mv Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
title Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
spellingShingle Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
Gouth Gouth, Thomas
Zirconium
Implant dentures
Zirconia
Biomaterial
Laser patterning
Etching
roughness
Mechanical properties
Zirconi
Implants dentals
Àrees temàtiques de la UPC::Enginyeria dels materials
title_short Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
title_full Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
title_fullStr Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
title_full_unstemmed Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
title_sort Combination of laser-assisted surface modification and chemical etching on zirconia-based biomaterials: effect on the psichochemical and mechanical properties
dc.creator.none.fl_str_mv Gouth Gouth, Thomas
author Gouth Gouth, Thomas
author_facet Gouth Gouth, Thomas
author_role author
dc.contributor.none.fl_str_mv García de Albéniz López de Aberasturi, Nerea
Mas Moruno, Carlos
dc.subject.none.fl_str_mv Zirconium
Implant dentures
Zirconia
Biomaterial
Laser patterning
Etching
roughness
Mechanical properties
Zirconi
Implants dentals
Àrees temàtiques de la UPC::Enginyeria dels materials
topic Zirconium
Implant dentures
Zirconia
Biomaterial
Laser patterning
Etching
roughness
Mechanical properties
Zirconi
Implants dentals
Àrees temàtiques de la UPC::Enginyeria dels materials
description Tetragonal zirconia polycrystal stabilized with 3% mol of yttria (3Y-TZP) is a ceramic material frequently used to replace traditional titanium dental implants given to its high flexural strength, biocompatibility, and aesthetic advantage. Additionally, it is demonstrated that surface topographical modification of zirconia at micro- and nano-scale levels encourages osseointegration and cell response, two crucial factors for successful dental implantation. Among the available treatments, hydrofluoric acid (HF) etching and laser patterning are two effective methods for roughening zirconia surfaces without severely damaging the surface implant. In fact, the main benefit of laser treatment over alternative methods is the ability to engrave precise structures on the material's surface in addition to producing microtopography. Subsequently, chemical etching produces homogeneous nanoscale roughness. The aim of this master’s thesis was to investigate the influence of the combination of laser patterning and acid etching on the psychochemical properties, microstructure and mechanical reliability of yttriastabilized zirconia for dental application. Zirconia discs were prepared by cold isostatic pressing and sintered at 1450ºC. Then, the samples underwent a surface modification using a nanosecond laser. The topographical pattern consisted on parallel grooves with a periodicity of 50 µm. Afterwards, half of the laser-structured samples were subjected to chemical etching using a hydrofluoric acid solution (40% HF for one hour). Mirror-like polished, only etched and only lasered surface specimens were used for the comparison with laser and etched samples. The topography of the specimens was characterized by means of confocal laser scanning microscopy (LSCM), contact profilometer, and scanning electron microscopy (SEM). Microstructural changes and the wettability of the samples were evaluated by Xray diffraction (XRD) and contact angle measurement, respectively. Furthermore, ball-on-three-balls (B3B) test was performed in order to characterize the mechanical properties of the samples. Results showed that the laser treatment was able to engrave well-defined and repeatable groove structures on the surface of 3Y-TZP, but side effects were generated such as pileup and microcracks. Furthermore, the pileup structures were eliminated and a nano-topography was generated by applying a chemical etching after the laser patterning. In terms of the microstructure analysis, the volume of monoclinic phase was found to be insignificant under every circumstance. Therefore, the treatments do not affect the stability of zirconia. Besides, the mechanical test revealed that the mean flexural strength was preserved on the chemically etched samples, but it decreased when laser treatment and laser treatment combined with etching were performed. Lastly, etched surfaces exhibited a lower contact angle.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-02-09
2023
2023-04-14
dc.type.none.fl_str_mv master thesis
http://purl.org/coar/resource_type/c_bdcc
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/386216
url https://hdl.handle.net/2117/386216
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-ShareAlike 4.0 International
http://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-ShareAlike 4.0 International
http://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universitat Politècnica de Catalunya
publisher.none.fl_str_mv Universitat Politècnica de Catalunya
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869408807953629184
score 15,300719

Similares en LA Referencia