title: Camouflage effects following resin infiltration of postorthodontic white-spot lesions in vivo: One-year follow-up.
abstract: OBJECTIVE
  To assess camouflage effects by concealment of postorthodontic white-spot lesions (WSLs) to sound adjacent enamel (SAE) achieved over 12 months with resin infiltration (Icon, DMG, Hamburg, Germany).
  
  
  METHODS
  Twenty subjects (trial teeth nteeth = 111) who had received resin infiltration treatment of noncavitated postorthodontic WSLs were contacted for a 1-year follow-up assessment of CIE-L*a*b* colors (T12). Color and lightness (CIE-L*a*b*) data for WSLs and SAE were compared to baseline data assessed before infiltration (T0) and those assessed after 6 months (T6), using a spectrophotometer. The target parameter was the difference between the summarized color and lightness values (ΔEWSL/SAE). Intergroup (WSL, SAE) and intertime comparisons (T0 vs T6, T12) were performed using paired t-tests at a significance level of α = 5%.
  
  
  RESULTS
  Nine subjects (trial teeth nteeth = 49; male/female ratio 5/4; age range 13-19 years) were available at T12. After the highly significant reduction of ΔEWSL/SAE discrepancies between T0 and T6, analysis of 12-month records revealed color and lightness discrepancy of WSL vs SAE that was significantly decreased compared with baseline, indicating an assimilation of WSL color to SAE appearance after infiltration, while an additional reduction of discrepancies between T6 and T12 was not significant.
  
  
  CONCLUSIONS
  As color and lightness characteristics of the Icon infiltrant as well as the esthetic camouflage effects achieved by WSL infiltration were not altered significantly or clinically relevant after 12 months, the method of resin infiltration can be recommended for an enduring esthetic improvement of postorthodontic WSL.
authors.affiliation: a  Research Fellow, Department of Orthodontics, University of Göttingen, Göttingen, Germany.
authors.forename: Amely
authors.initials: A
authors.lastname: Eckstein
authors.forename: Hans-Joachim
authors.initials: HJ
authors.lastname: Helms
authors.forename: Michael
authors.initials: M
authors.lastname: Knösel
mesh_terms: D000293:Adolescent; D000465:Algorithms; D003116:Color; D003731:Dental Caries / Q000473:pathology / Q000628:therapy*; D003743:Dental Enamel / Q000473:pathology; D003764:Dental Materials / Q000737:chemistry*; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D016910:Orthodontic Brackets; D012117:Resins, Synthetic / Q000737:chemistry*; D013053:Spectrophotometry / Q000295:instrumentation; D013499:Surface Properties; D055815:Young Adult
chemical_list: D003764:Dental Materials; D012117:Resins, Synthetic; C578177:icon infiltrant
keywords: CIE-L*a*b*; Durability of camouflage effect; Icon; Resin infiltration; White spot lesion; in vivo