Effect of re-use of a disposable micro-polisher on the surface of a microhybrid resin composite.
OBJECTIVE
To evaluate the surface roughness of Esthet-X resin-based composite with the multi-use of a one-step disposable diamond micro polisher PoGo with profilometer and scanning electron microscope (SEM).


METHODS
35 discs were obtained by condensing Esthet-X in an 8x2 mm plexiglass mold covered with a Mylar strip. The specimens were polymerized 40 seconds on both sides. Five Mylar strips' surfaces were used as a control. Six groups of five discs were formed by reusing the same PoGo disc 1, 2, 3, 4, 5 and 6 times. The surfaces of the 30 discs were ground wet with a 1200 grit silicon carbide paper and then polished 30 seconds with PoGo. The surface roughness was measured with Surtronic 4. One representative sample of each group was selected to visualize the surfaces morphology by SEM. The results were statistically evaluated by one-way ANOVA (P< 0.01).


RESULTS
There were no statistical differences with the Mylar-created surfaces and one, two and three times' use of PoGo. Furthermore, reusing PoGo one to four times was not found to affect the surface roughness (P> 0.01). There were no differences with four and five re-uses of PoGo while using the same disc six times exhibited more roughness than single use and Mylar strip (P< 0.01). The SEM and the profilometer revealed similar results.
Türkün
Lezize Sebnem
LS
Ege University School of Dentistry, Department of Restorative Dentistry and Endodontics, 35100 Izmir, Turkey. sebnemturkun@hotmail.com
D000704:Analysis of Variance; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003775:Dental Polishing / Q000295:instrumentation*; D018130:Diamond / Q000737:chemistry; D004209:Disposable Equipment; D017743:Equipment Reuse; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011093:Polyethylene Terephthalates / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D017655:Silicon Compounds / Q000737:chemistry; D013499:Surface Properties
D017554:Carbon Compounds, Inorganic; D003188:Composite Resins; C466112:Esthet-X; D011093:Polyethylene Terephthalates; D011108:Polymers; D017655:Silicon Compounds; C025539:Lavsan; D018130:Diamond; D019904:Polymethyl Methacrylate; C022088:silicon carbide