title: Influence of filler charge on gloss of composite materials before and after in vitro toothbrushing.
abstract: OBJECTIVE
  This study evaluated the gloss behaviour of experimental resin composites loaded with different filler percentages, immediately after polishing and after toothbrushing simulation.
  
  
  METHODS
  Sixteen disc-shaped specimens were fabricated for each different-charged composite (40%, 50%, 60%, 70% and 75%) and polished with SiC abrasive papers. Gloss measurements were made prior to simulated toothbrushing. The specimens were subjected to the simulation for 5, 15, 30 and 60 min using an electrical toothbrush with a standardized pressure while being immersed in a toothpaste/artificial saliva slurry.
  
  
  RESULTS
  Baseline composite gloss values ranged from 69.7 (40%) to 81.3 (75%) GU (gloss units) and from 18.1 (40%) to 32.3 (75%) GU after 1h of brushing. Highest gloss values were obtained by 75%-charged resin, while the lowest values were obtained by the 40%-charged one.
  
  
  CONCLUSIONS
  All tested materials showed a gloss decrease. However, the higher filler load a composite resin has, the higher gloss it can achieve.
  
  
  CONCLUSIONS
  Gloss of resin composite materials is an important factor in determining aesthetic success of anterior restorations, and this property may vary according to the filler charge of the restorative material. Higher filler load of a composite resin results in higher gloss values.
authors: Department of Restorative Dentistry, Araraquara School of Dentistry, UNESP Univ Estadual Paulista, Araraquara, Brazil. Electronic address: fernandajasse@hotmail.com.
authors: Fernanda Ferreira
authors: FF
authors: Jassé
authors: Edson Alves
authors: EA
authors: de Campos
authors: Dorien
authors: D
authors: Lefever
authors: Enrico
authors: E
authors: Di Bella
authors: Jean Pierre
authors: JP
authors: Salomon
authors: Ivo
authors: I
authors: Krejci
authors: Stefano
authors: S
authors: Ardu
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D017609:Barium Compounds / Q000737:chemistry; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods; D006801:Humans; D008027:Light; D008422:Materials Testing; D012464:Saliva, Artificial / Q000737:chemistry; D017655:Silicon Compounds / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors; D014099:Toothbrushing / Q000295:instrumentation / Q000379:methods*; D014100:Toothpastes / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D017609:Barium Compounds; D017554:Carbon Compounds, Inorganic; D003188:Composite Resins; D003764:Dental Materials; D012464:Saliva, Artificial; D017655:Silicon Compounds; D014100:Toothpastes; C022088:silicon carbide
keywords: Composite resins; Dental polishing; Gloss; Toothbrushing