title: Adhesive Systems as an Alternative Material for Color Masking of White Spot Lesions: Do They Work?
abstract: OBJECTIVE
  To evaluate the color masking effect of infiltration treatment of artificial white spot lesions (AWSL) using a dedicated resin in comparison to different adhesive systems.
  
  
  METHODS
  Enamel/dentin specimens were obtained from bovine incisors and baseline color was assessed using a reflectance spectrophotometer, according to the CIE L*a*b* system. AWSL were produced using a buffered acid solution and a new color evaluation was performed. The specimens were divided into 8 groups: control: artificial saliva changed daily for 7 days; IC: infiltrating resin Icon; EC: EquiaCoat; FU: Futurabond U; SBU: Single Bond U; SBMP: Scotchbond MP; OB: OptibondFL; BF: Bioforty. After the treatments, the color was evaluated again and the values for the parameters ΔL (change in lightness), Δa (change in chroma), Δb (change in hue), and ΔE (general color difference) were calculated in relation to baseline. Data were analyzed by one-way ANOVA and Tukey's tests.
  
  
  RESULTS
  After treatment, ANOVA showed significant differences for all parameters (p = 0.001). Tukey's test showed the greatest lightness reduction (ΔL) for the IC group, followed by EC, FU, and SBU. The SBMP, OB, and BF groups were similar to the control. For Δb values, all groups showed differences in relation to the control, with no differences between them. In relation to ΔE, all groups showed differences in relation to the control (ΔE = 5.24), with no significant differences between them. ΔE values after application of all resinous materials were lower than the threshold of 3.7, indicating effective color masking.
  
  
  CONCLUSIONS
  The Icon infiltrant produced a greater lightness reduction of white lesions (ΔL). For general color difference (ΔE), all the resinous materials tested were able to color mask artificial AWSL.
authors.forename: Ana Júlia Farias
authors.initials: AJ
authors.lastname: de Lacerda
authors.forename: Daniele Mara
authors.initials: DM
authors.lastname: da Silva Ávila
authors.forename: Alessandra Buhler
authors.initials: AB
authors.lastname: Borges
authors.forename: Cesar Rogerio
authors.initials: CR
authors.lastname: Pucci
authors.forename: Carlos
authors.initials: C
authors.lastname: Rocha Gomes Torres
mesh_terms: D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D003116:Color; D003731:Dental Caries / Q000473:pathology*; D003743:Dental Enamel / Q000648:ultrastructure; D003804:Dentin / Q000648:ultrastructure; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D020366:Methylmethacrylate / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D012031:Refractometry; D019279:Resin Cements / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry; D012464:Saliva, Artificial / Q000737:chemistry; D013053:Spectrophotometry
chemical_list: D008689:Methacrylates; C469607:OptiBond FL; D011140:Polyurethanes; D019279:Resin Cements; D012117:Resins, Synthetic; D012464:Saliva, Artificial; C084018:Scotchbond Multi-Purpose; C512545:futurabond NR; C578177:icon infiltrant; C115612:single bond; D020366:Methylmethacrylate; D017438:Bisphenol A-Glycidyl Methacrylate