… The specimens were divided into 6 groups (n =10), according to the association between
polishing system and number of autoclave cycles: G1 – optrapol used for first time and
without autoclave (control); G2 – optrapol used after the 10th autoclave cycle; G3 – optrapol
used after the 20th autoclave cycle; G4 – astrobrush used for first time and without autoclave
(control); G5 – astrobrush used after the 10th autoclave cycle; G6 – astrobrush used after
the 20th autoclave cycle. The … Conclusion: Twenty cycles of autoclaving, did not affect …

The purpose of the study was to evaluate the effect of autoclaving one-step polishing
systems on the surface roughness of a nanoparticle resin composite. Sixty disk-shaped
specimens were fabricated (ø 12 mm and 2.5 mm height) with Tetric N-Ceram
(IvoclarVivadent). Thirty discs were polished with brushes (Astrobrush, IvoclarVivadent) and
the other 30 discs with rubber tips (Optrapol, Ivoclar Vivadent). The specimens were divided
into 6 groups (n= 10), according to the association between polishing system and number of …