Effect of finishing and polishing procedures on surface roughness of tooth-colored materials.
OBJECTIVE
To evaluate the effect of 2 polishing systems on surface roughness of tooth-colored restorative materials.


METHODS
The materials included 3 flowable resins (Admira Flow, Voco; Dyract Flow, Dentsply; Filtek Flow, 3M ESPE) and a micro?hybrid composite resin (Filtek Z250, 3M ESPE). Eighteen specimens of each material were prepared using a Plexiglas well covered by a Mylar strip (10 mm in diameter and 2 mm in depth). The Ra (baseline) was measured with a Mitutoyo Surftest-402 Surface Roughness Tester (Mitutoyo) with a standard cut-off value of 0.8 mm. Five tracings at different locations on each specimen were made. The specimens were then randomly divided into two finishing and polishing groups (n = 9): (1) Sof-Lex Pop-on disks (3M ESPE), and (2) Astropol and Astrobrush system (Ivoclar Vivadent). After finishing and polishing, surface roughness of the specimens was remeasured. Data were analyzed using 1- and 2-way ANOVA, at P < .05.


RESULTS
The Mylar strip produced the smoothest surface in all restorative materials, while 2-way ANOVA demonstrated a significant difference for the finishing and polishing procedures (P = .000). The smoothest surface was generated with Sof-Lex Pop-on disks for all the materials tested. In procedure 2 (diamond bur/Astropol and Astrobrush system), Admira Flow group received the highest average surface roughness value, and a significant difference was revealed between Admira Flow and the other resins (P = .001).


CONCLUSIONS
Sof-Lex Pop-on disks produced a smoother surface than Astropol and Astrobrush silicone polishers for microhybrid and flowable composites.
Baskent University, School of Dentistry, Department of Conservative Dentistry, 06490, Bahcelievler, Ankara, Turkey. ccivelek@hotmail.com
Ciğdem
C
Celik
Gül
G
Ozgünaltay
D000537:Aluminum Oxide / Q000737:chemistry; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D055117:Curing Lights, Dental; D003738:Dental Cements / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D018130:Diamond / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D010316:Particle Size; D011093:Polyethylene Terephthalates / Q000737:chemistry; D017655:Silicon Compounds / Q000737:chemistry; D012828:Silicones / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D017554:Carbon Compounds, Inorganic; D020770:Compomers; D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; C467913:Filtek Flow; C444701:Filtek Z250; D011093:Polyethylene Terephthalates; D017655:Silicon Compounds; D012828:Silicones; C525452:admira flow; C476993:dyract flow; D014867:Water; C025539:Lavsan; D018130:Diamond; D000537:Aluminum Oxide; C022088:silicon carbide