Polishing system

Surface roughness of restorative material (nm)

Filtek Z350 XT

Filtek Bulk Fill

Tetric N Ceram

Mylar strip

161.07 ± 6.82a

162.08 ± 6.82a

164.19 ± 6.82a

Pogo one step

188.33 ± 6.03b

190.41 ± 6.03b

191.42 ± 6.03b

Sof-lex multi-step

215.87 ± 3.876c

217.89 ± 3.87c

217.88 ± 3.87c