Finishing diamonds can play a critical role in polishing composites. Objective;The surface roughness of a hybrid composite (Filtek Z250, 3M ESPE) was evaluated after use of 2 multiuse (DET6, Brassler; TDF6, Axis) and 2 disposable (Neodiamond, Microcopy; Piranha, SS White) finishing diamond burs in as-received and sterilized after use conditions. Methods; Five specimens per diamond and condition were pre-cured against a mylar strip. Specimens were finished with a diamond finishing bur and then polished with Sof-Lex discs. Surface roughness (Ra,µm) was measured using a profilometer. Five tracings were recorded per specimen. Results; Means and standard deviations of Ra (n=25) are listed in the table below. ANOVA showed significant differences. Tukey-Kramer intervals (p<0.05) for comparisons of means among 4 diamonds and 2 conditions were 0.06 and 0.03 µm, respectively. Conclusions; Surface roughness after diamond finishing was greatest with TDF6 and Piranha. At final polish, all the as-received burs produced statistically similar roughness. At final polish for the sterilized condition, all the burs produced statistically similar roughness. Sterilized burs produced rougher surfaces than as-received burs after final polish, except Piranha.
3:45 PM-5:00 PM, Thursday, 7 March 2002 San Diego Convention Center Exhibit Hall C
Back to the Dental Materials: VIII - Others-Non-metallic Program
Back to the IADR/AADR/CADR 80th General Session (March 6-9, 2002)