title: [Efficacy of one year treatment of icon infiltration resin on post-orthodontic white spots].
abstract: OBJECTIVE
  To clinically evaluate the effectiveness of icon infiltration resin on masking post-orthodontic white spots.
  
  
  METHODS
  Eight post-orthodontic patients with 6 maxillary anterior teeth showing signs of decalcification (total 48 teeth) were enrolled in this study. All teeth were treated with icon  resin infiltration according to manufacturer's recommendation. Standardized digital photographs were taken before, immediately after and 1 week, 6 and 12  months after treatment. Before taking pictures the assigned teeth were cleaned using pumice and rubber polishing cups. The results were classified into  three groups: completely masked, partially masked, and unchanged. Pictures of partially masked teeth were analyzed using image analysis software  (Image-pro plus 6.0), size of the white spot lesion (W) and the whole tooth facial surface (T) were measured, then W/T ratio (in %) was calculated. The  images were imported into image analysis software (Photoshop) which presented the images into histograms of gray scale from (0 to 255).
  
  
  RESULTS
  Among the 48 teeth, 11 teeth (22.9%, 11/48) were classified as completely masked, whereas 37 teeth (77.1 %, 37/48) were classified as partially masked  and no tooth unchanged. For partially masked teeth, W/T ratio decreased significantly after treatment from 31.37% to 7.99% (by Wilcoxon's signed rank  test, P<0.05). The means at gray scale for the initial and 1 week photographs after treatment were 188.07± 5.62 and 143.20± 7.03 respectively, and there  was significant difference by Wilcoxon,s signed rank test (P<0.05). The data of 6 and 12 months after treatment were 136.33± 4.54 and 139.57± 3.70  respectively, there were no significant differences (P>0.05) in comparison to 1 week after treatment.
  
  
  CONCLUSIONS
  Resin infiltration was proven to be an  effective treatment for masking white spot lesions. The surface color of infiltrated lesions remained stable after 12 months.
authors: Peking University School, Beijing, China.
authors: Chao-hua
authors: CH
authors: Feng
authors: Xiao-yu
authors: XY
authors: Chu
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000293:Adolescent; D003731:Dental Caries / Q000473:pathology / Q000517:prevention & control*; D003743:Dental Enamel / Q000473:pathology*; D004955:Esthetics, Dental; D005260:Female; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D016910:Orthodontic Brackets / Q000009:adverse effects*; D012117:Resins, Synthetic / Q000737:chemistry*; D017001:Tooth Demineralization / Q000188:drug therapy / Q000209:etiology
chemical_list: D012117:Resins, Synthetic; C578177:icon infiltrant