Nanostructured hydroxyapatite as filler for methacrylate-based root canal sealers

作者：Collares F M^*; Leitune V C B; Rostirolla F V; Trommer R M; Bergmann C P; Samuel S M W

来源：International Endodontic Journal, 2012, 45(1): 63-67.

DOI：10.1111/j.1365-2591.2011.01948.x

• hydroxyapatite
• methacrylate
• root canal sealer

Collares FM, Leitune VCB, Rostirolla FV, Trommer RM, Bergmann CP, Samuel SMW. Nanostructured hydroxyapatite as filler for methacrylate-based root canal sealers. International Endodontic Journal, 45, 63-67, 2012.
Aim To evaluate the effect of different concentrations of nanostructured hydroxyapatite on the radiopacity, flow and film thickness of an experimental root canal sealer.
Methodology An experimental dual-cured root canal sealer was produced with a methacrylate-based comonomer blend. Nanostructured hydroxyapatite/calcium tungstate solutions (ratios 10 : 90, 20 : 80, 30 : 70 and 40 : 60) were added to produce the sealer. Radiopacity was evaluated using a digital system and an aluminium step wedge (n = 5). Flow and thickness tests were conducted in accordance with ISO 6876 (n = 3). The data were analysed using one-way anova and Tukeys test (a = 0.05).
Results All groups had levels of radiopacity in accordance with ISO 6876. The flow of the experimental sealers was not significantly different (P = 0.204). All groups had a film thickness in accordance with ISO 6876 and with no statistical difference (P = 0.654).
Conclusion The addition of up to 40% HAnano to root canal sealers did not alter their radiopacity and film thickness.

• 出版日期2012-1