title: Masking of white spot lesions by resin infiltration in vitro.
abstract: OBJECTIVE
  The aim of this in vitro study was to evaluate the ability of one commercial and five experimental infiltrating resins (infiltrants) to camouflage enamel white spot lesions immediately after resin infiltration and after a staining period.
  
  
  METHODS
  In each of 120 bovine enamel samples, two artificial caries lesions were created (windows A and C; pH=4.95, 50 days), whereas two windows were protected serving as sound controls (B and D). After etching windows C and D (37% phosphoric acid), specimens were randomly allocated to 6 groups. Either one of 5 experimental infiltrants or a commercial infiltrant (Icon, DMG) (refractive indices 1.50-1.55) was applied and light cured. After half of each specimen was polished, samples were remineralized (pH=7.0) and stained with tea and red wine for 50 days. Photographic images after various treatment steps were obtained. Color differences (ΔE) of untreated (A) and treated lesions (C) as well as infiltrated sound enamel (D) were compared with untreated enamel (B).
  
  
  RESULTS
  All infiltrants showed significantly better color match with sound enamel (median ΔE [25th/75th percentile]: 2.2 [1.5/3.1]) than untreated controls (9.3 [8.0/10.9]) (p<0.001, Wilcoxon, post hoc Bonferroni). Moderate correlation between refractive index and ΔE of infiltrated lesions was demonstrated (R(2)=0.43, p>0.05). Staining was significantly reduced for polished infiltrated lesions compared to untreated or infiltrated unpolished lesions (p<0.001).
  
  
  CONCLUSIONS
  Resin infiltration is suitable to mask artificial white spot lesions. Polished infiltrated lesions are resistant to staining in vitro.
  
  
  CONCLUSIONS
  Resin infiltration is a micro-invasive approach to camouflage post-orthodontic white spot lesions.
authors.affiliation: Department of Conservative Dentistry and Periodontology, Christian-Albrechts-Universität, Kiel, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Paris
authors.forename: F
authors.initials: F
authors.lastname: Schwendicke
authors.forename: J
authors.initials: J
authors.lastname: Keltsch
authors.forename: C
authors.initials: C
authors.lastname: Dörfer
authors.forename: H
authors.initials: H
authors.lastname: Meyer-Lueckel
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000818:Animals; D002417:Cattle; D003116:Color; D003124:Colorimetry / Q000379:methods; D003731:Dental Caries / Q000473:pathology*; D003743:Dental Enamel / Q000473:pathology*; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods; D055115:Light-Curing of Dental Adhesives / Q000379:methods; D008689:Methacrylates / Q000737:chemistry; D020366:Methylmethacrylate / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011897:Random Allocation; D012031:Refractometry; D012117:Resins, Synthetic / Q000737:chemistry*; D013662:Tea; D013997:Time Factors; D014075:Tooth Discoloration / Q000517:prevention & control; D014089:Tooth Remineralization / Q000379:methods; D014920:Wine
chemical_list: D003764:Dental Materials; D008689:Methacrylates; D010756:Phosphoric Acids; D011109:Polymethacrylic Acids; D012117:Resins, Synthetic; D013662:Tea; C578177:icon infiltrant; C020946:triethylene glycol dimethacrylate; D020366:Methylmethacrylate; D011092:Polyethylene Glycols; C074277:ethoxylated bis-phenol A dimethacrylate; C030242:phosphoric acid
keywords: Aesthetics; Caries infiltration; Color; Infiltrant; Refractive index; White spot lesions