The effect of different finishing and polishing systems on the surface roughness of different composite restorative materials.
OBJECTIVE
The purpose of this in vitro study was to examine the effect of two different finishing systems on the surface roughness of different types of composite restorative materials.


METHODS
Thirty specimens, 8 mm in diameter and 3 mm in depth, were prepared using a microfill composite (Clearfil ST, Kuraray Co. Ltd., Osaka, Japan), a hybrid composite (Clearfil AP-X, Kuraray Co. Ltd., Osaka, Japan), and a packable composite (Clearfil Photo Posterior, Kuraray Co. Ltd., Osaka, Japan) cured against a Mylar matrix strip to create a baseline surface. The average surface roughness was measured using a surface profilometer (Surftest 211, Mitutoyo, Japan) in five different positions on each sample before and after finishing with one of the two finishing systems [Sof-Lex discs (3M) and Po-Go (Dentsply)]. The obtained data were analyzed by two-way analysis of variance (ANOVA) at a p=0.05 significance level.


RESULTS
There were statistically significant differences in the average surface roughness (Ra, microm) between the Mylar matrix strip, Sof-Lex discs, and Po-Go discs (p<0.05). For all tested materials, the Mylar matrix strip provided smoother surfaces than both of the finishing systems (p<0.05). When the finishing discs were compared, Sof-Lex discs produced a smoother surface than Po-Go discs for all tested materials (p<0.05).


CONCLUSIONS
The Mylar matrix strip provided a smoother surface than Sof-Lex and Po-Go discs. Furthermore, Sof-Lex discs produced smoother surfaces than Po-Go discs. Sof-Lex and Po-Go systems produced clinically acceptable surface roughness for microfill, hybrid, and packable composite resin materials. The effect of finishing and polishing systems on surface roughness was dependent on both the system and the composite resin restorative material.
Uçtaşli
Mine Betül
MB
Department of Operative Dentistry and Endodontics, Faculty of Dentistry, University of Gazi, Ankara, Turkey. uctasli@gazi.edu.tr
Arisu
Hacer Deniz
HD
Omürlü
Hüma
H
Eligüzeloğlu
Evrim
E
Ozcan
Suat
S
Ergun
Gülfem
G
D000704:Analysis of Variance; D003188:Composite Resins; D003775:Dental Polishing / Q000295:instrumentation*; D003793:Dental Restoration, Permanent; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties
C112828:Clearfil AP-X; C483502:Clearfil ST; D003188:Composite Resins; D008689:Methacrylates; C092420:Clearfil Photo Posterior