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      Estabilidad dimensional de la silicona por adición: polivinilsiloxano un estudio in vitro Translated title: Dimensional stability of silicone by addition: polyvinylsiloxane in vitro study

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          Abstract

          RESUMEN Introducción. Se han realizado con el fin de evaluar la estabilidad dimensional, cada grupo de estudio confecciona su propio aditamento con el fin de determinar si existe o no una variación dimensional de los diferentes materiales de impresión utilizados en la rehabilitación oral. Esta variación va a depender de distintos factores como el tiempo, el material, la temperatura, la humedad entre otros. Objetivo. En este sentido, el objetivo del estudio fue evaluar la estabilidad dimensional de la silicona de adición / polivinilsiloxano (VPS) y para ello se tendrá en cuenta el tiempo. Métodos. Se trata de un estudio experimental. La muestra estuvo conformada por un total de 50 modelos, 25 para VPS Y 25 para el grupo control cuyo material fue la silicona por condensación. Para realizar el estudio se confecciono un modelo maestro teniendo en cuenta 6 localizaciones y 5 periodos de tiempo donde elprimer grupo a los 0 minutos, el segundo grupo a los 20 minutos, el tercer grupo a la 1 hora, cuarto grupo a las 6 horas y el quinto grupo a las 24 horas, después de tomada la impresión. Resultados. Después de la toma de impresión cuando se contabiliza a los 0 minutos, a los 60 minutos, a las 6 horas y a las 24 horas se obtiene el estadístico t ≥ 2,1318 y p≤ 0,05 confirmando que se encuentran diferencias significativas entre las dos siliconas respecto a la variación dimensional. Conclusiones. Se concluye que existe una variación de la estabilidad dimensional al ser comparada con el grupo control como lo es la silicona por condensación.

          Translated abstract

          ABSTRACT Introduction. They have been carried out in order to evaluate dimensional stability, a study group makes its own abutment in order to determine if there is no dimensional variation of the different impression materials used in oral rehabilitation. This variation will depend on different factors such as time, material, temperature, humidity among others. Objective. In this sense, the objective of the study was to evaluate the dimensional stability of the addition silicone / polyvinylsiloxane (VPS) and for this, time will be taken into account. Methods. We went on to an experimental study. The sample consisted of a total of 50 models, 25 for VPS and 25 for the control group whose material was silicone by condensation. To carry out the study, a master model was made taking into account 6 locations and 5 time periods where the first group at 0 minutes, the second group at 20 minutes, the third group at 1 hour, the fourth group at 6 hours and the fifth group at 24 hours, after the impression was taken. Results. After taking the impression when it is counted at 0 minutes, at 60 minutes, at 6 hours and at 24 hours, the statistic t ≥ 2.1318 and p≤ 0.05 is obtained, confirming that there are significant differences between the two silicones with respect to the dimensional variation. Conclusions. It is concluded that there is a variation in dimensional stability when compared with the control group such as silicone by condensation..

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          Digital versus conventional impressions for fixed prosthodontics: A systematic review and meta-analysis.

          Limited evidence is available for the marginal and internal fit of fixed dental restorations fabricated with digital impressions compared with those fabricated with conventional impressions.
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            Factors affecting the accuracy of elastometric impression materials.

            The purpose of this study was to evaluate the effects of (1) various impression materials, (2) different storage times and (3) the proportion of inorganic filler on the accuracy and stability of elastometric impression materials.
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              Dimensional stability of elastomeric impression materials: a critical review of the literature.

              The aim of the present paper was to review the literature concerning the dimensional stability of dental elastomeric impression materials, to support recommendations to control the variables that influence the accuracy of these materials. An electronic search of the Scopus and PubMed databases was performed in November 2010. Articles were selected according to the following inclusion criteria: investigation of the dimensional stability of dental elastomers, an experimental study, sample size reported, laboratory tests described, and published in an English language peer-reviewed journal. The search resulted in 47 articles published between 1958 and 2008; of these, 24 were selected for inclusion in the present study. Great variability was discovered in the experimental methodologies used, such as different working times, temperatures and storage mediums for the impressions, impression techniques, material thicknesses, tray types, and methods of evaluation. Despite the lack of standardization among the studies, this review supports the following recommendations to control the dimensional stability: impressions should be stored at temperatures between 21 +/- 2 degrees C; polyether impressions should be stored in an environment with a relative humidity below 50%; time until pouring has been settled for each elastomer material.
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                Author and article information

                Journal
                odonto
                Avances en Odontoestomatología
                Av Odontoestomatol
                Ediciones Avances, S.L. (Madrid, Madrid, Spain )
                0213-1285
                2340-3152
                June 2022
                : 38
                : 2
                : 71-75
                Affiliations
                [6] Lambayeque orgnameUniversidad Señor de Sipán Peru carreragl@ 123456crece.uss.edu.pe
                [4] Lima orgnameUniversidad Nacional Federico Villarreal orgdiv1Facultad de Odontología Peru Scipiondental@ 123456gmail.com
                [2] Ica orgnameUniversidad Nacional San Luis Gonzaga de Ica orgdiv1Facultad de Estomatología Perú mariselroxanavr@ 123456gmail.com
                [5] Lima orgnameUniversidad Nacional Federico Villarreal Peru paguero@ 123456unfv.edu.pe
                [3] Lima orgnameUniversidad Nacional Federico Villarreal orgdiv1Facultad de Odontología Peru drpamenmu@ 123456gmail.com
                [1] Lima orgnameUniversidad Nacional Federico Villarreal orgdiv1Facultad de Odontología Peru wagnerhg24@ 123456hotmail.com
                Article
                S0213-12852022000200005 S0213-1285(22)03800200005
                352354a6-f5c0-40cc-b380-635712d7115a

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 International License.

                History
                : 15 June 2021
                : 10 May 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 9, Pages: 5
                Product

                SciELO Spain

                Categories
                Artículos

                In Vitro Techniques,Elastómeros de silicona,Precisión de la Medición Dimensional,Técnicas In Vitro,Silicones elastomers,Dimensional MeasurementAccuracy

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