title: Influence of filler on the difference between the transmitted and reflected colors of experimental resin composites.
abstract: OBJECTIVE
  This study sought to determine the influence of filler size and amount on the difference between the transmitted and reflected colors and the translucency of experimental resin composites.
  
  
  METHODS
  The color of experimental resin composites (38 mm in diameter and 1 mm in thickness) was measured in the transmittance and reflectance modes. Opalescence parameter (OP) was calculated as the difference in blue-yellow and red-green coordinates between the transmitted and reflected colors. Translucency parameter (TP) was calculated as the color difference between the reflected colors over a white and a black background.
  
  
  RESULTS
  The range of OP was between 1.0 and 5.7, which was varied by the size and amount of filler. TP decreased as the amount of filler increased when the filler size was the same.
  
  
  CONCLUSIONS
  Controls on the proper filler size and amount should be studied further to modify the opalescence and translucency of resin composites, considering also the effect of filler on mechanical properties.
authors.affiliation: Department of Dental Biomaterials Science and Dental Research Institute, School of Dentistry, Seoul National University, 28 Yeongeon-dong, Jongro-gu, Seoul, Republic of Korea. ykleedm@snu.ac.kr
authors.forename: Yong-Keun
authors.initials: YK
authors.lastname: Lee
mesh_terms: D000975:Antioxidants / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002084:Butylated Hydroxytoluene / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D005898:Glass / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D055095:Optics and Photonics; D010316:Particle Size; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D019163:Reducing Agents / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013729:Terpenes / Q000737:chemistry; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D000975:Antioxidants; D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D019163:Reducing Agents; D012821:Silanes; D013729:Terpenes; D014867:Water; C029824:urethane dimethacrylate luting resin; C020946:triethylene glycol dimethacrylate; D002084:Butylated Hydroxytoluene; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C048339:camphoroquinone; C049840:2-(dimethylamino)ethyl methacrylate