Physical-Mechanical Properties of Bulk Fill Composites Submitted to Biodegradation by Streptococcus mutans

Autor(es)

Jessica Rodrigues Camassari ^[1] ; Lourenço Correr-Sobrinho ^[2] ; Américo Bortolazzo Correr ^[3] ; Julia Puppin-Rontani ^[4] ; Rafael Nobrega Stipp ^[5] ; Regina Maria Puppin-Rontani ^[6] ; Andreia Bolzan de Paula ^[7]

Afiliação do(s) autor(es)

^[1] Universidade Estadual de Campinas. Dental Materials Division, Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[2] Universidade Estadual de Campinas. Dental Materials Division, Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[3] Universidade Estadual de Campinas. Dental Materials Division, Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[4] Universidade Estadual de Campinas. Dental Materials Division, Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[5] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Oral Diagnosis - Brasil

^[6] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Health Sciences and Pediatric Dentistry, Pediatric Dentistry Division - Brasil

^[7] Universidade Estadual de Campinas. Dental Materials Division, Piracicaba Dental School. Department of Restorative Dentistry - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Dental Journal; v. 31, n. 4, p. 431-439, 2020-09-04.

Resumo

Abstract The aim of this study was to evaluate the Streptococcus mutans biofilm influence on the roughness (Ra), gloss (GU), surface hardness (KHN) and flexural strength (FS) of high viscosity bulk fill composites. Filtek Bulk Fill (FBF), Tetric N Ceram Bulk Fill (TNC), X-tra fil Bulk Fill (XF) and Filtek Z350 (FZ) were used. Ten discs of each composite were prepared for Ra, KHN and GU and 20 bars for the FS. After 24 h, specimens were polished and initial analyzes performed. Samples were sterilized and subjected to biodegradation for 7 days and final analyzes performed. Representative samples of each group were evaluated in Scanning Electron Microscope. Data were submitted to ANOVA two factors and Tukey test. XF presented the highest values (p<0.05) of Ra before and after biodegradation (0.1251; 0.3100), and FZ (0.1443) the lowest after biodegradation (p<0.05). The highest GU values (p<0.05) were observed for FZ (71.7; 62) and FBF (69.0; 64.6), and the lowest (p<0.05) for TNC (61.4; 53.3) and XF (58.5; 53.5), both before and after biodegradation. For KHN the highest values were obtained by XF (151.7; 106), and the (p< 0.05) lowest values for TNC (62.2; 51.8), both before and after biodegradation. The highest values (p<0.05) of FS were observed for FZ (127.6) and the lowest (p<0.05) for TNC (86.9); after biodegradation, XF (117.7) presented the highest (p<0.05) values compared to TNC and FZ.” In conclusion, biodegradation increased Ra and decreased GU and KHN for all. Concerning FS, degradation provided a significant decreased value only for FZ. (AU)

• Processo FAPESP: 16/18720-8 - Influência da biodegradação por biofilme cariogênico de S.mutans nas propriedades físico-mecânicas de compósitos bulk fill
• Beneficiário: Jéssica Rodrigues Camassari
• Modalidade de apoio: Bolsas no Brasil - Mestrado