Evaluation of the optical density of composite resins with the use of nanotechnology by means of intraoral radiographic system (CMOS)

• Published in: Acta scientiarum. Health sciences Vol. 37; no. 1; pp. 89 - 94
• Main Authors: Iwaki, Lilian Cristina Vessoni, Lacerda, Flavia Martins, Silva, Mariliani Chicarelli da, Bispo, Carina Gisele Costa, Takeshita, Wilton Mitsunari
• Format: Journal Article
• Language: English; Spanish
• Published: Maringa Universidade Estadual de Maringa 01.01.2015; Editora da Universidade Estadual de Maringá - EDUEM; Universidade Estadual de Maringá
• Subjects: composite resins; dental materials; diagnosis; Medical diagnosis; Nanotechnology; radiographic image enhancement; Resins; Studies; Brasil
• ISSN: 1679-9291; 1807-8648
• DOI: 10.4025/actascihealthsci.v37i1.19961

The aim of this study was investigate the optical density of four different brands of composite resins of nanotechnology. The composite resins Estelite Sigma Quick® (Tokuyama), Esthet -X HD® (Dentsply), 4 Seasons® (Ivoclar Vivadent) and Filtek Z350XT™ (3M-ESPE) were inserted into cavities in transparent acrylic sheets, separated by thickness into 1, 2 and 3 mm. The images were imported into the software ImageTool® 3.0 (UTHSCSA, EUA). Data were submitted to ANOVA and Tukey. The mean values of the composite resins 4 Seasons® (2.71 ± 0.20) and Filtek Z350XT™ (2.64 ± 0.26) did not differ statistically for samples with thickness of 1 and 2 mm. However, for both thickness Estelite Sigma Quick® (1.92 [+ or -] 0.11) and Esthet-X HD® (3.57 ± 0.29) showed significant differences compared to the other composite resins (p = .012). All 3 mm-thick samples showed significant differences among themselves (Estelite Sigma Quick® p < .001, Esthet-X HD® p < .001, 4 Seasons® p = .001 and Filtek Z350XT™ p = .003). Conclusion: Among the three thicknesses evaluated, Estelite Sigma Quick® showed the lowest optical density, whereas the highest values were observed for Esthet X HD®. The resins are studied according to the rules of optical density value thus being favorable clinical use. Keywords: diagnosis, radiographic image enhancement, dental materials, composite resins, nanotechnology. O objetivo deste estudo foi investigar a densidade optica de quatro diferentes marcas comercias de resinas compostas desenvolvidas com nanotecnologia. As resinas Estelite Sigma Quick® (Tokuyama), Esthet -X HD® (Dentsply), 4 Seasons® (Ivoclar Vivadent) e Filtek Z350 XT® (3M-ESPE) foram inseridas em orificios existentes em placas de acrilico com espessuras de 1, 2 e 3 mm. As imagens foram importadas para o programa ImageTool® 3.0 (UTHSCSA, EUA). Os dados foram submetidos a analise de variancia Anova e de Tukey. Nas espessuras de 1 e 2 mm, a media das resinas 4 Season® (2.71 ± 0.20) e Z350XT® (2.64 ± 0.26) nao diferiram de forma estatistica significante entre si (p = .012). No entanto, a Estelite Sigma Quick® (1.92 ± 0.11) e a Esthet-X HD® (3.57 ± 0.29) apresentaram diferencas estatisticamente significantes em relacao a 4 Season® e Z350XT®. Na espessura 3 mm, todas apresentaram diferencas estatisticamente significantes entre si (Estelite Sigma Quick® p < .001, Esthet-X HD® p < .001, 4 Seasons® p = .001 and Filtek Z350XT™ p = .003). A Estelite Sigma Quick® apresentou os menores valores nas espessuras estudadas, os maiores valores observados na Esthet X HD®, para as tres espessuras avaliadas. As resinas estudadas estao de acordo com a normativa de densidade optica, portanto favoravel ao uso clinico. Palavras-chave: diagnostico, radiologia digital, materiais dentarios, resinas compostas, nanotecnologia.