Finishing Systems on the Final Surface Roughness of Composites

Abstract

This study evaluated differences in surface roughness of a microhybrid (Gradia™ Direct, GC America) and a nanofil (Filtek™ Supreme, 3M™ ESPE™) composite using four polishing systems: PoGo™/Enhance ® (DENTSPLY/Caulk), Sof-Lex™ (3MTM ESPE™), Astropol ® (Ivoclar Vivadent), and Optidisc™ (KerrHawe). Methods and Materials: An aluminum mold was used to prepare 2 X 60 composite disks (10 mm X 2 mm). Composite was packed into the mold, placed between two glass slabs, and polymerized for 40 seconds from the top and bottom surfaces. Specimens were finished to a standard rough surface using Moore's disks with six brushing strokes. Specimens were rinsed and stored in artificial saliva in individual plastic bags at 36°C for 24 hours prior to testing. Specimens were randomly assigned to one of the four polishing systems and were polished for 30 seconds (10 seconds per grit) with brushing strokes according to the manufacturer's instructions. Mean surface roughness (Ra) was recorded with a surface-analyzer 24 hours after storage in artificial saliva, both before and after polishing. Means were analyzed using two-way and one-way analysis of variance (ANOVA) and Tukey multiple comparison tests at p < 0.05. Results: There was a statistically significant difference for baseline measures between Filtek™ and Gradia™ (p=0.0338). For Filtek™, Sof-Lex™ provided a significantly smoother surface (Ra=0.80 ± 0.21) than Optidisc™ (Ra=0.93 ± 0.28), Astropol ® (Ra=1.

Effect of Finishing/Polishing Systems on the Surface Roughness of Novel Posterior Composites

“…It can be explained by the presence of multi‐grain types of caoutchouc, silicone oxide, aluminum oxide, titanium oxide, iron oxide, and diamond dusts impregnated into the polishers. However, a contradictory result was presented by another study that showed that a significantly rough surface of microhybrid composites was expressed by Astropol polishers 32 …”

A Comparative Analysis of Different Finishing and Polishing Devices on Nanofilled, Microfilled, and Hybrid Composite: A Scanning Electron Microscopy and Profilometric Study

“…81112 Large particles embedded in Sof-Lex disks tend to rip through the surface of the composites and when used with certain hybrid composites tend to cut and abrade filler particles and resin matrix equally, resulting in smoother surface. But the main disadvantage is that the frictional heat generated by Sof-Lex disks causes micro cracks in polymer matrix, which gives rougher surface for hybrid composite materials.…”

Effect of Toothbrushing on Color Changes of Esthetic Restorative Materials

“…Therefore, regardless of the cavity class and location, polishing of tooth‐colored restorations, which enhance both esthetics and longevity of restorations, is an essential step in restorative dentistry . In this study, to mimic clinical situations, polishing with aluminum oxide‐based abrasive devices (Sof‐Lex discs) whose efficacy was proven in previous studies was used . The surface texture of a tooth‐colored restoration influences the stain resistance of the restoration which can be affected by polishing .…”