dc.contributor.advisor	Ulloa Beltrán, Viviana
dc.contributor.advisor	Rivera Barrero, Jaime Rodrigo
dc.contributor.advisor	Díaz Báez, David
dc.contributor.author	González Ribeiro, Andrea Judite
dc.contributor.author	Pérez Cañete, Mónica
dc.date.accessioned	2022-06-30T22:38:25Z
dc.date.available	2022-06-30T22:38:25Z
dc.date.issued	2022
dc.description.abstract	En los últimos años, el zirconio ha sufrido muchos cambios en su estructura y composición para aumentar su translucidez sin sacrificar su resistencia a la fractura, ampliando así su indicación clínica. Así, la zirconia translúcida ha sido considerada como un material estético, ya que, ofrece indicaciones para la realización de restauraciones posteriores y anteriores, incluyendo carillas. La principal dificultad asociada con el óxido de zirconio translúcido es la de situaciones con poca retención mecánica de la preparación, ya que la zirconia policristalina es químicamente inerte y no puede ser grabada por el ácido fluorhídrico , lo que implica una adhesión menos eficaz en comparación con las cerámicas a base de sílice. Actualmente existen distintos protocolos para tratar la superficie del zirconio y mejorar su resistencia adhesiva. El objetivo de este estudio fue comparar la resistencia adhesiva y el tipo de falla en esmalte del zirconio de IV con respecto al disilicato de litio. En este estudio experimental in vitro se usó una muestra probabilística de 30 muestras, los cuales se distribuyeron en 2 grupos; grupo 1: cubos de zirconio de IV generación cementado a esmalte mediante la técnica APC; Grupo 2: cubos de disilicato de litio cementado a esmalte mediante las indicaciones del fabricante .Se realizó un envejecimiento por almacenamiento a una temperatura constante de 37 °C durante 2 semanas para realizar posteriormente el análisis de pruebas mecánicas en un dispositivo universal de fuerzas. La carga se aplicó hasta que la cerámica se desalojó mediante el test de shear bond strength. Se evaluó el tipo de falla en estereomicroscopio y se determinó el protocolo de acuerdo a la interface. Se utilizó la prueba no paramétrica de U de Mann Whitney posterior al resultado de la prueba de normalidad de “Shapiro- Wilk” (p= 0.036 en el grupo Zirconio y p=0.579 en el grupo de disilicato de litio). Con respecto a la comparación del tipo de falla se usó para el análisis el test estadístico de Chi cuadrado de Pearson y test exacto de Fisher. Existen diferencias significativas en la resistencia adhesiva del zirconio de cuarta generación y el disilicato de litio, presentando resultados superiores. En la mayoría de los especímenes en los que se utilizó zirconio se presentaron tipos de fallas adhesivas al sustrato y falla cohesiva en el cementante. Palabras clave: zirconio, disilicato de litio, fuerza adhesiva, esmalte, cementación.	spa
dc.description.abstractenglish	In recent years zirconium has undergone many changes in its structure and composition to increase translucency without sacrificing resistance to fracture, thus expanding its clinical indication. Thus, translucent zirconia has been considered as an aesthetic material, as it offers indications for posterior and anterior restorations, including veneers. The main difficulties associated with translucent zirconium oxide are situations of poor mechanical retention of the preparation, because polycrystalline zirconia is chemically inert and cannot be etched by hydrofluoric acid, thus resulting in less effective adhesion compared to silica-based ceramics. Currently, there are different protocols to treat zirconium surfaces and to improve their adhesive strength. The objective of this study was to compare adhesive strength and type of failure of 4th-generation zirconium enamel versus lithium disilicate. This experimental in vitro study used a probabilistic sample of 30 specimens distributed in 2 groups: Group 1: 4th-generation zirconium cubes cemented to enamel using APC technique; Group 2: Lithium disilicate cubes cemented to enamel following the manufacturer’s directions. Aging was obtained by storage at constant temperature (37°C)for 2 weeks followed by analysis of mechanical assays with a universal force device. Load was applied until the ceramic was dislodged using the shear bond strength test. The type of failure was assessed under the stereomicroscope and the protocol was determined according to the interface. A non-parametric Mann Whitney U test was used after the result of the “Shapiro-Wilk” normality test (p=0.036 in the zirconium group, and p=0.579 in the lithium disilicate group). Pearson's chi-square statistical test and Fisher's exact test were used for the comparative analysis of the type of failure. There were significant differences in adhesive strength between the two materials, with 4th-generation zirconium being superior to lithium disilicate. Most zirconium specimens showed failure of adhesion to the substrate and failure of cohesion in the cementing material. Keywords: Zirconium, lithium disilicate, adhesive strength, enamel, cementation.	eng
dc.description.degreelevel	Especialización	spa
dc.description.degreename	Especialista en Operatoria Dental Estética y Materiales Dentales	spa
dc.format.mimetype	application/pdf
dc.identifier.instname	instname:Universidad El Bosque	spa
dc.identifier.reponame	reponame:Repositorio Institucional Universidad El Bosque	spa
dc.identifier.repourl	repourl:https://repositorio.unbosque.edu.co
dc.identifier.uri	https://hdl.handle.net/20.500.12495/8102
dc.language.iso	spa
dc.publisher.faculty	Facultad de Odontología	spa
dc.publisher.grantor	Universidad El Bosque	spa
dc.publisher.program	Especialización en Operatoria Dental Estética y Materiales Dentales	spa
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dc.rights	Atribución 4.0 Internacional	*
dc.rights.accessrights	info:eu-repo/semantics/openAccess
dc.rights.accessrights	https://purl.org/coar/access_right/c_abf2
dc.rights.local	Acceso abierto	spa
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject	Zirconio	spa
dc.subject	Disilicato de litio	spa
dc.subject	Fuerza adhesiva	spa
dc.subject	Esmalte	spa
dc.subject	Cementación	spa
dc.subject.keywords	Zirconium	spa
dc.subject.keywords	Lithium disilicate	spa
dc.subject.keywords	Adhesive strength	spa
dc.subject.keywords	Enamel	spa
dc.subject.keywords	Cementation	spa
dc.subject.nlm	WU300
dc.title	Resistencia adhesiva y tipo de falla en esmalte de zirconio de IV generación y disilicato de litio	spa
dc.title.translated	Adhesive strength and type of failure in 4th generation zirconium and lithium disilicate enamel	spa
dc.type.coar	https://purl.org/coar/resource_type/c_7a1f
dc.type.coarversion	https://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.driver	info:eu-repo/semantics/bachelorThesis
dc.type.hasversion	info:eu-repo/semantics/acceptedVersion
dc.type.local	Tesis/Trabajo de grado - Monografía - Pregrado	spa

Resistencia adhesiva y tipo de falla en esmalte de zirconio de IV generación y disilicato de litio

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