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Effect of finishing and polishing procedures on the surface roughness of packable composites.
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2001
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Materials ScienceEngineeringMaterial ProcessingSurface RoughnessMechanical EngineeringComposite TechnologyPackable CompositesSurface FinishingAbrasive ProcessPolishing ProceduresMachiningSurface FinishSurface TreatmentSurface PolishingAbrasive MachiningPolishing Discs
The study evaluated the average surface roughness of three packable composites and one hybrid composite before and after a range of finishing and polishing procedures. Surface roughness (Ra) was measured for each composite before and after treatment with a fine finishing diamond bur, resin finisher and polishing pastes, silicone‑based systems, aluminum‑oxide disks, a silicon carbide brush, a composite sealant, and for one composite also after a finishing carbide. The diamond bur increased Ra for all composites, the finishing carbide improved smoothness (up to 3.5× better than diamond on SureFil), Sof‑Lex discs produced the smoothest surfaces, Z‑100 yielded the lowest Ra, and the Protect‑It sealant had minimal effect except a slight Ra increase on ALERT.
This study examined the average surface roughness (Ra, micron) of three packable composites and one hybrid composite cured against mylar, before and after treatment with a fine finishing diamond bur, a resin finisher followed by fine and extrafine polishing paste, two silicone-based finishing and polishing systems, fine and super-fine aluminum-oxide polishing disks, a silicon carbide-impregnated polishing brush and a surface-penetrating composite sealant. Additionally, the Ra was examined for one of the packable composites before and after treatment with a finishing carbide, prior to the finishing and polishing procedures detailed above. The finishing diamond significantly increased the Ra for all composites (ALERT, SureFil, Solitaire and Z-100). The finishing carbide used with SureFil (SureFil + C) also increased the Ra; however, it also produced surfaces up to 3.5x smoother when compared to SureFil surfaces finished with the diamond. Overall, Sof-Lex Contouring and Polishing Discs were able to produce the smoothest surfaces, followed by the Jiffy Composite Polishing Cups, the Enhance Composite Finishing & Polishing System/Prisma-Gloss Composite Polishing Paste, the Diacomp Intra-Oral Composite Polishers and the Jiffy Composite Polishing Brushes, respectively. The smoothest surfaces were produced using Z-100, followed by SureFil + C (carbide finishing bur), Solitaire, SureFil and ALERT, respectively. In general, Protect-It Composite Surface Sealant had little effect on the Ra, except with ALERT, where a slight increase in Ra was observed.