Análisis comparativo del desgaste generado sobre la superficie del esmalte dental por una cerámica de ultrabaja temperatura de fusión y una cerámica de baja temperatura de fusión
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Fecha
2008
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
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Título del volumen
Editor
Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Los sistemas cerámicos actuales son capaces de entregar una estética y resistencia
adecuada, sin embargo debido a su dureza superficial, producen desgaste sobre la superficie del
esmalte en piezas antagonistas.
Objetivo: Comparar el desgaste generado sobre esmalte dental sano por una cerámica de
ultrabaja temperatura de fusión versus una cerámica de baja temperatura de fusión.
Materiales y Método: Caras libres de terceros molares lavados y mantenidos en suero fisiológico
a 6º C, fueron adheridas con cianoacrilato sobre platinas de acrílico para su posterior colocación
en una máquina de desgaste. Se confeccionaron de 8 puntas de cerámica Finesse (Dentsply) y 8
puntas de cerámica VITA VM13 (Vita) de 3 milímetros de diámetro y que terminan en un cono de 3
milímetros de altura. Se generó desgaste de la superficie de esmalte por medio de forzar el
impacto y posterior deslizamiento de una punta de cerámica a lo largo de la superficie de esmalte
por un trecho de 10 milímetros con una carga aplicada de 250 gramos. Esta secuencia fue
repetida con una frecuencia de 5,5 Hertz durante 60 minutos para cada muestra y en forma
alternada para cada tipo de cerámica. Las muestras fueron fijadas con masilla sobre una platina
de observación de una lupa estereoscópica y observadas tangencialmente con un aumento de
objetivo de 2X y fotografiadas con una cámara digital de 12 Megapixeles. Las imágenes fueron
analizadas morfométricamente con el programa lmage Tool (versión1 .28). Se midió digitalmente el
área comprendida por una recta que une los puntos más altos que delimitan el "valle" producido
por el desgaste y las rectas a su vez unen el punto más profundo del desgaste.
Resultados: Finesse fue la cerámica que produjo menor desgaste sobre el esmalte con un
promedio de 54,7070437 um2., mientras que VITA VM13 fue la que produjo mayor desgaste sobre
la superficie del esmalte con un promedio de 108,5229312 um2.
.
The current ceramic systems are capable of delivering an aesthetic and adequate strength, however due to its surface hardness, they produce wear on the enamel surface enamel of the pieces antagonists. Objective: To compare the wear on tooth enamel generated by a ultra fusing temperature ceramic versus a low fusing temperature ceramic. Materials and Methods: Free faces of third molars, were washed and kept in physiological saline at 6 °C, they were attached with cyanoacrylate on acrylic plates for later their later placement in a wear machine. 8 pointed pieces of ceramic Finesse (Dentsply) and 8 pointed pieces ceramic VITA VM13 (Vita) from 3 millimeters in diameter and ending in a cone of 3 millimeters in height were fabricated. Enamel wear was generated on the surface by the impact force and subsequent slide along the surface of the enamel on a stretch of 10 millimeters with a load of 250 grams. This sequence was repeated at a frequency of 5.5 Hertz for 60 minutes for each sample and on an alternating basis for each type of ceramic. The samples were fixed with a putty on the observation deck of a stereoscopic microscope and observed tangentially with a increasing of 2x and photographed with a digital camera of 12 Megapixels. The images were analyzed with the morphometric program Image Tool (version 1.28). It was digitally measured the area covered by a straight line connecting the highest points that outlined the "valley" produced by wear and tum straight to unite the deepest point of burnout. Results: Finesse was the ceramic that produced less wear on enamel with an average of 54.7070437 um 2, while VITA VM13 was the one that produced more wear on the surface of the enamel with an average of 108.5229312 um2
The current ceramic systems are capable of delivering an aesthetic and adequate strength, however due to its surface hardness, they produce wear on the enamel surface enamel of the pieces antagonists. Objective: To compare the wear on tooth enamel generated by a ultra fusing temperature ceramic versus a low fusing temperature ceramic. Materials and Methods: Free faces of third molars, were washed and kept in physiological saline at 6 °C, they were attached with cyanoacrylate on acrylic plates for later their later placement in a wear machine. 8 pointed pieces of ceramic Finesse (Dentsply) and 8 pointed pieces ceramic VITA VM13 (Vita) from 3 millimeters in diameter and ending in a cone of 3 millimeters in height were fabricated. Enamel wear was generated on the surface by the impact force and subsequent slide along the surface of the enamel on a stretch of 10 millimeters with a load of 250 grams. This sequence was repeated at a frequency of 5.5 Hertz for 60 minutes for each sample and on an alternating basis for each type of ceramic. The samples were fixed with a putty on the observation deck of a stereoscopic microscope and observed tangentially with a increasing of 2x and photographed with a digital camera of 12 Megapixels. The images were analyzed with the morphometric program Image Tool (version 1.28). It was digitally measured the area covered by a straight line connecting the highest points that outlined the "valley" produced by wear and tum straight to unite the deepest point of burnout. Results: Finesse was the ceramic that produced less wear on enamel with an average of 54.7070437 um 2, while VITA VM13 was the one that produced more wear on the surface of the enamel with an average of 108.5229312 um2
Notas
Tesis (Cirujano Dentista, Especialización en Clínica Integral del Adulto)
Palabras clave
Esmalte Dental