Influence of expiration date on the dimensional accuracy of elastomers
DOI:
https://doi.org/10.33448/rsd-v9i10.8147Keywords:
Dental impression materials; Elastomers; Date of validity of products.Abstract
Impression materials are used to make models in different dentistry fields, with emphasis on oral rehabilitation with fixed and removable prostheses or dentures. The aim was to compare the dimensional accuracy of impressions based on polyvinylsiloxane (Express) and polyether (Impregum Soft) elastomers performed 2 years after their expiration date to impressions that did not exceed this period. Impressions were performed over matrix with metal tray; they were removed after polymerization and divided into 4 groups (n=5). Dimensional accuracy was evaluated through optical microscopy on the 20-µm line at 25-mm length (ISO 4823 standard). Dimensional accuracy values (%) were subjected to two-way ANOVA (material × expiration date) and Tukey's test (α=0.05). Based on the analysis of expiration date as independent factor (p=0.017), mean dimensional accuracy values recorded for elastomer impression 2 years after expiration date (99.89%) were statistically lower than values recorded for the non-expired one (99.92%). Changes resulting from the use of elastomers 2 years after their expiration date do not affect the dimensional accuracy of prostheses deriving from these impressions.
References
Anusavice K. Phillips (2003). Science of Dental Materials. 11th ed. Philadelphia: Saunders.
Carlo, H. L., Fonseca, R. B., Gonçalves, L. D. S., Correr-Sobrinho, L., Soares, C. J., & Sinhoreti, M. A. C. (2010). Analysis of filler particle levels and sizes in dental alginates. Materials Research, 13(2), 261-264.
Donovan, T. E., & Chee, W. W. (2017). A review of contemporary impression materials and techniques. Dental Clinics of North America, 61(4), 779-796.
German, M. J., Carrick, T. E., & McCabe, J. F. (2008). Surface detail reproduction of elastomeric impression materials related to rheological properties. Dental Materials, 24(7), 951-956.
Gonçalves, F. S., Popoff, D. A. V., Castro, C. D. L., Silva, G. C., Magalhães, C. S., & Moreira, A. N. (2011). Dimensional stability of elastomeric impression materials: a critical review of the literature. European Journal of Prosthodontics and Restorative Dentistry, 19(4), 163-166.
Guiraldo, R. D., Berger, S. B., Punhagui, M. F., Moretto, T. S., Lopes, M. B., Gonini- Júnior, A., & Sinhoreti, M. A. C. (2018). Influence of chloramine-T disinfection on elastomeric impression stability. European journal of dentistry, 12(2), 232-236.
Guiraldo, R. D., Borsato, T. T., Berger, S. B., Lopes, M. B., Gonini-Jr, A., & Sinhoreti, M. A. C. (2012). Surface detail reproduction and dimensional accuracy of stone models: influence of disinfectant solutions and alginate impression materials. Brazilian dental journal, 23(4), 417 421.
Guiraldo, R. D., Moreti, A. F., Martinelli, J., Berger, S. B., Meneghel, L. L., Caixeta, R. V., & Sinhoreti, M. A. (2015). Influence of alginate impression materials and storage time on surface detail reproduction and dimensional accuracy of stone models. Acta Odontologica Latinoamericana: AOL, 28(2), 156-161.
Guler, U., Budak, Y., Ruh, E., Ocal, Y., Canay, S., & Akyon, Y. (2013). Effect of mixing techniques on bacterial attachment and disinfection time of polyether impression material. European journal of dentistry, 7(Suppl 1), S54-59.
Islamova, R. M., Dobrynin, M. V., Ivanov, D. M., Vlasov, A. V., Kaganova, E. V., Grigoryan, G. V., & Kukushkin, V. Y. (2016). bis-Nitrile and bis-dialkylcyanamide platinum (II) complexes as efficient catalysts for hydrosilylation cross-linking of siloxane polymers. Molecules, 21(3), 311.
ISO 4823 (2000). Dentistry: Elastomeric Impression Materials. Geneva, Switzerland: International Organization for Standardization.
Kim, K. M., Lee, J. S., Kim, K. N., & Shin, S. W. (2001). Dimensional changes of dental impression materials by thermal changes. Journal of Biomedical Materials Research, 58(3), 217-220.
Perakis, N., Belser, U. C., & Magne, P. (2004). Final impressions: a review of material properties and description of a current technique. International Journal of Periodontics & Restorative Dentistry, 24(2), 109-117.
Pereira, J. R., Murata, K. Y., Valle, A. L. D., Ghizoni, J. S., & Shiratori, F. K. (2010). Linear dimensional changes in plaster die models using different elastomeric materials. Brazilian oral research, 24(3), 336-341.
Vitti, R. P., Correr-Sobrinho, L., & Sinhoreti, M. A. C. (2011). Dimensional accuracy of stone casts made by a monophase impression technique using different elastomeric impression materials. Brazilian Journal of Oral Sciences, 10(3), 175-179.
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Copyright (c) 2020 Ricardo Danil Guiraldo; Sandrine Bittencourt Berger; Eloisa Aparecida Carlesse Paloco; Alexandre dos Reis Freitas; Murilo Baena Lopes; Rodrigo Ribeiro de Carvalho; Gabriela Fleury Seixas; Mário Alexandre Coelho Sinhoreti
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