Aim:The purpose of this in vitro stuby was to examine the affect of two different finishing sysythems on thw
methods and materils: Thirty sprcimens. 8mm in diameter and 3 mm in depth were prepared uding a microfill composite (Clearfil ST. Kuraray Co. Ltd. Osaka. japan). a hybrid composite (Clearfil AP-X. Kuraray Co.Ltd Osaka. Japan). and apackble Composite (Cleafil Photo Posterior Kuraray Co Ltd Osaka Japan) cured againdt a Mylar matrix strip to ceate a baseline surface The average surface roughness was measured using asurface phofilmoeter (Surftest211 Mitutoyo Japan) in five different positions on sample befor and after finishing wit one of the two finishing systems [Sof-Lex discs (3M) and Po-Go (Dentsply)] The obtaiend data were analyzed by two-way analysis of variance (ANOVA) at a p=0.05 sigmificance lwvel
Results: There were statistically significant differnces in the everage surface roughness (Ra. um) between the mylar matrix strip Sof-Lex discs and Op-Go discs (P