Comparación in vitro de la estabilidad dimensional entre la silicona de adición y condensación
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Fecha
2008
Autores
Profesor/a Guía
Facultad/escuela
Idioma
es
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Editor
Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Los materiales de impresión especialmente las siliconas por adición y por condensación
son muy utilizadas en la confección de prótesis fija. Ambas siliconas poseen características muy
similares pero difieren en su estabilidad dimensional. Este estudio experimental tiene por objetivo
comparar la estabilidad dimensional entre la silicona por adición y condensación. Para realizar el
estudio experimental se confeccionó un modelo maestro (control) con cuatro pilares Ti Adapt
simulando inserciones de prótesis fija plural. A este se le tomaron 48 impresiones, 24 impresiones
con silicona por condensación y 24 con silicona por adición, y se dividieron en seis grupos de
distintos tiempos de vaciado (inmediato, 30 minutos, 1 hora, 6 horas, 1 día, 7 días). Tanto al
modelo maestro como a los modelos de yeso obtenidos a partir de las impresiones se les
realizaron 6 mediciones de distancia. Los resultados obtenidos fueron analizados estadísticamente
utilizando el Test T no pareado y el Test ANOVA, se estableció P≤ 0,05 para determinar
diferencias estadísticamente significativas. Se encontraron diferencias significativas sólo en los
vaciados realizados 7 días después de tomada la impresión con silicona por condensación, en la
silicona por adición no se encontraron diferencias estadísticamente significativas. Se puede
concluir que la silicona por adición presenta una estabilidad dimensional superior a las siliconas
por condensación y que para la obtención de modelos de gran precisión las impresiones en
silicona por condensación deben ser vaciadas durante las primeras 24 horas y las impresiones en
silicona por adición permiten ser vaciadas por un periodo de 7 días.
The impression materials specially the addition silicones and condensation are very used in the manufacture of fixed prosthesis. 8oth silicones have characteristics very similar but differ in it dimensional stability. This experimental study has for purpose compare the dimensional stability between addition silicones and condensation. To make this experimental study was to manufacture a master cast (control) with four pillars Ti Adapt simulate plural fixed prosthesis insertions. To this master, the cast was took 48 impressions, 24 impressions with condensation silicones and 24 with addition silicones, and they were divided into 6 groups of different times of poured (immediately, 30 minutes, 1 hour, 6 hours, 1 day and 7 days). We took 6 distances measurements to the master cast and the stones models obtained by the impressions. The obtained results were statistical study using the T Test and ANOVA Test, we established a P≤ 0,05 to determine statistically significant differences. We found statistically significant differences only in the stone models poured 7 days after the impressions were taken with condensation silicone, in the addition silicone didn't present any statistically significant differences. We can conclude that addition silicones present superior dimensional stability compare to condensation silicones and to obtain stone models of great precision the condensation silicones impression must be poured during the first 24 hours and the addition silicones impressions can be poured for a period of 7 days.
The impression materials specially the addition silicones and condensation are very used in the manufacture of fixed prosthesis. 8oth silicones have characteristics very similar but differ in it dimensional stability. This experimental study has for purpose compare the dimensional stability between addition silicones and condensation. To make this experimental study was to manufacture a master cast (control) with four pillars Ti Adapt simulate plural fixed prosthesis insertions. To this master, the cast was took 48 impressions, 24 impressions with condensation silicones and 24 with addition silicones, and they were divided into 6 groups of different times of poured (immediately, 30 minutes, 1 hour, 6 hours, 1 day and 7 days). We took 6 distances measurements to the master cast and the stones models obtained by the impressions. The obtained results were statistical study using the T Test and ANOVA Test, we established a P≤ 0,05 to determine statistically significant differences. We found statistically significant differences only in the stone models poured 7 days after the impressions were taken with condensation silicone, in the addition silicone didn't present any statistically significant differences. We can conclude that addition silicones present superior dimensional stability compare to condensation silicones and to obtain stone models of great precision the condensation silicones impression must be poured during the first 24 hours and the addition silicones impressions can be poured for a period of 7 days.
Notas
Tesis (Cirujano Dentista, Especialización en Clínica Integral del Adulto)
Palabras clave
Implantes Dentarios, Materiales de Impresión Dentales, Materiales Dentales