title: [Use of interproximal enamel reduction in adult malocclusion patients with periodontitis].
abstract: OBJECTIVE
  To discuss the advantage of interproximal enamel reduction when it was applied to provide space needed in orthodontic treatment of malocclusion patients with periodontitis.
  
  
  METHODS
  Thirty four patients were chosen from those seeking for orthodontic treatment at Stomatology Department of the Third Hospital of Peking University from 2004 to 2009, which includes 9 males and 25 females, the average age was 25.4 years. All of them were diagnosed with periodontitis to some extend. The needed space for orthodontic treatment was achieved for each patient through the procedure of plaster model analysis and cephalometric tracing, then the treatment plan was given on the premise that interproximal enamel reduction was the first choice for creating spaces, the sites and amount of enamel reduction, any still-needed further extraction and the corresponding anchorage were determined. The fixed orthodontic treatment began after systematic periodontal treatment. Needle-shaped fine diamond drill was used for cutting 0.25-0.5mm interproximal enamel after arch alignment, NaF glycerol was used after polishing to decrease caries risk. The result was retained after orthodontic treatment.
  
  
  RESULTS
  After 6-24 months' orthodontic treatment, the teeth were aligned, the interdental embrasures were shrunk or disappeared, normal overbite, overjet and posterior occlusion were achieved, and periodontal conditions were stable. No new caries were found in the areas of enamel reduction at the 0.5-2 years follow-up examination.
  
  
  CONCLUSIONS
  There is clear superiority to apply interproximal enamel reduction to create space for orthodontic treatment in those patients with periodontitis. By this method, the difficulty and periodontal risk of orthodontic treatment will decrease, the treatment duration will be shorten, the gingival aesthetics will be improved, and the live-span of dentition will be elongated.
authors.affiliation: Department of Stomatology, Third Hospital of Peking University, Beijing 100191, China. zhengxu_allen@sina.com
authors.forename: Xu
authors.initials: X
authors.lastname: Zheng
mesh_terms: D000328:Adult; D002508:Cephalometry; D003731:Dental Caries; D003743:Dental Enamel; D005260:Female; D005881:Gingiva; D006801:Humans; D008297:Male; D008310:Malocclusion; D010518:Periodontitis; D014070:Tooth; D055815:Young Adult