Efecto de la aplicación de ácido fluorhidríco al 10% y arenado sobre bloques de zirconio
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Fecha
2012
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
La creciente demanda por restauraciones estéticas ha motivado el desarrollo de
biomateriales para uso clínico, capaces de satisfacer esa aspiración. Es por ello que se
han desarrollado biomateriales de altos estándares estéticos, como el zirconio que
permite realizar restauraciones de PFU ó PFP libres de metal. Sin embargo, para
considerar una rehabilitación como exitosa no sólo debemos enfocarnos en la estética
sino que también en otro parámetro: la longevidad.
En ella, la cementación es de crucial importancia y esta es más efectiva cuando
existe una buena microtraba mecánica, otorgada por las rugosidades en la superficie
del artificio a cementar.
Este trabajo de investigación es experimental descriptivo in vitre. En el usamos
50 bloques de zirconio que se separaron en 5 grupos de 1 O bloques cada uno. Cada
grupo con un tratamiento distinto y uno de ellos sin tratamiento.
La muestra total fue observada con MEB y tan sólo 20 muestras fueron
analizadas con Rugosímetro.
Al MEB, el efecto del tratamiento sobre la superficie de los bloques se observó a
magnificaciones de 300 y 600. Especialmente la superficie que fue tratada con Oxido de
Alúmina de 50μ, es que tenía un mayor número de rugosidades.
Con el Rugosímetro, se obtuvo la media de las profundidades de las
rugosidades. Como resultado en las superficies tratadas, la media del tamaño de las
rugosidades disminuyo, especialmente la tratada con Oxido de Alúmina de 50μ.
Debido a los resultados obtenidos, no podemos confirmar lo planteado en la
hipótesis del trabajo, puesto que hubo un aumento en el número de rugosidades en la
superficie de los bloques, pero no un incremento en la profundidad de ellas.
The increasing demand far aesthetic restorations has carried out to the development of biomaterials far clinical use, able to satisfy this desire. Therefore biomaterials and technics with high aesthetic standards, such as Zirconium restorations, have been developed. That allows us as to indicate free metal crowns and bridges. However, to be considered as a successful rehabilitation must focus not only on aesthetics but also on other parameters such as longevity. Cementation is crucial and most effective when exists a good mechanical graps granted by the roughness on the surface of the device to be cemented. This is an "in vitro" experimental descriptive research, where 50 blocks of zirconium were separated into 5 groups of 1 O blocks each according to the surface treatment done. One group remains untreated. Samples were observed by SEM and only 20 of them were measured with a profilometer. By SEM, the effect of the surface treatment of the blocks were observed at 300 and 600 magnifications. The block wich their surface was treated with 50μ alumina oxide, had a larger number of roughness. A profilometer gave the averaged from the depths of the roughness. As a result on treated surfaces, the average size of the roughness decreased, especially the treated 50μ alumina oxide. Because of the results delivered, the hypothesis raised at the begining of the investigation can't be confirmed, since there was an increase in the number of ridges on the surface of the blocks, but not in the depth of the roughness.
The increasing demand far aesthetic restorations has carried out to the development of biomaterials far clinical use, able to satisfy this desire. Therefore biomaterials and technics with high aesthetic standards, such as Zirconium restorations, have been developed. That allows us as to indicate free metal crowns and bridges. However, to be considered as a successful rehabilitation must focus not only on aesthetics but also on other parameters such as longevity. Cementation is crucial and most effective when exists a good mechanical graps granted by the roughness on the surface of the device to be cemented. This is an "in vitro" experimental descriptive research, where 50 blocks of zirconium were separated into 5 groups of 1 O blocks each according to the surface treatment done. One group remains untreated. Samples were observed by SEM and only 20 of them were measured with a profilometer. By SEM, the effect of the surface treatment of the blocks were observed at 300 and 600 magnifications. The block wich their surface was treated with 50μ alumina oxide, had a larger number of roughness. A profilometer gave the averaged from the depths of the roughness. As a result on treated surfaces, the average size of the roughness decreased, especially the treated 50μ alumina oxide. Because of the results delivered, the hypothesis raised at the begining of the investigation can't be confirmed, since there was an increase in the number of ridges on the surface of the blocks, but not in the depth of the roughness.
Notas
Tesis (Cirujano Dentista, Especialización en Clínica Integral del Adulto)
Palabras clave
Materiales dentales biocompatibles, Restauración estética, Desarrollo de biomateriales de altos estándares estéticos, Chile