Apical adaptation, sealing ability and push-out bond strength of five root-end filling materials

Autor(es)

Amoroso-Silva, Pablo Andres ; Marciano, Marina Angelica ; Guimaraes, Bruno Martini ; Hungaro Duarte, Marco Antonio ; Sanson, Ana Flavia ; de Moraes, Ivaldo Gomes

• Tipo de documento: Artigo Científico
• Fonte: BRAZILIAN ORAL RESEARCH; v. 28, n. 6, p. 6-pg., 2014-11-01.

Resumo

This study compared the fluid filtration, adaptation to the root canal walls, and the push-out bond strength of two resin-based sealers and three calcium silicate-based retrograde filling materials. Fifty maxillary canines were shaped using manual instruments and the apical portion was sectioned. Retrograde cavities of 3-mm depth were prepared. The specimens were divided into five groups (n = 10): Sealer 26 (S26); MBPc (experimental); MTA; Portland cement with 20% zirconium oxide (PC/ZO), and Portland cement with 20% calcium tungstate (PC/CT). The fluid filtration was measured at 7 and 15 days. To evaluate the interfacial adaptation, sections of the teeth, 1 and 2 mm from the apex, were prepared and the percentage of gaps was calculated. The push-out bond strength at 2 mm from the apex was evaluated. Statistical analysis was performed using the ANOVA/Tukey's test (p < 0.05). At 7 and 15 days (p = 0.0048, p = 0.006), the PC/CT group showed higher fluid filtration values when compared to other groups. At 1 mm from the apex, no statistical differences in the adaptation were found among the cements (p = 0.44). At 2 mm from the apex, the PC/ZO group presented statistically lower percentage of gaps than S26, MBPc, and MTA (p = 0.0007). The MBPc group showed higher push-out bond strength than other cements evaluated (p = 0.0008). The fluid filtration and interfacial adaptation of the calcium silicate-based cements were similar to those of the resin-based cements. The resinous cement MBPc showed superior push-out bond strength. (AU)

• Processo FAPESP: 11/19816-5 - Análise em estéreomicroscópio da adaptação apical de materiais obturadores retrógrados
• Beneficiário: Ana Flávia Grandini Sanson
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica