title: [Patients with anterior spaces caused by periodontal disease treated with aligner technique].
abstract: OBJECTIVE
  To treat the patients with anterior spaces caused by periodontal diseases with aligners and evaluate the periodontal conditions before and after treatment.
  
  
  METHODS
  Seven patients with anterior spaces ranged from 3.0 to 4.5 mm were randomly selected. All the patients were treated with aligner technique to close the spaces. Bleeding on probing (BOP) and probing depth (PD) were measured before treatment, 1 month, 3 months and 6 months after treatment. The CEJ-ABC distance was evaluated before treatment, 1 month, and 6 months after treatment.
  
  
  RESULTS
  No significant differences were found in periodontal evaluation and the CEJ-ABC distance between any two evaluated stages.
  
  
  CONCLUSIONS
  The aligners could be used in patients with anterior spaces caused by periodontal diseases. No periodontal tissue damages were found during the observation period.
authors: Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing 100050, China. byuxing@263.net
authors: Yu-Xing
authors: YX
authors: Bai
authors: Bin
authors: B
authors: Yang
authors: Qing
authors: Q
authors: Dai
authors: Jie
authors: J
authors: Tian
authors: Peng
authors: P
authors: Qi
authors: Bang-Kang
authors: BK
authors: Wang
mesh_terms: D000328:Adult; D003970:Diastema / Q000209:etiology / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D009967:Orthodontic Appliances; D010510:Periodontal Diseases / Q000150:complications