title: [Occlusal contacts during protrusion and lateral movements after orthodontic treatment].
abstract: OBJECTIVE
  To observe the occlusal contacts during protrusion and lateral movements in adolescent patients after orthodontic treatment.
  
  
  METHODS
  Sixteen adolescent patients who achieved normal dentition after orthodontic treatment were selected as experimental group and 17 healthy adolescents and young adults with normal occlusion were selected as control group. The occlusal contacts during protrusion and lateral movements in the two groups were recorded with T-Scan II system and compared.
  
  
  RESULTS
  The prevalence of occlusal interferences in the posterior segment in the experimental group was high and most of them were on the second molars. The value of disclusion time during left lateral movements, right lateral movements and protrusion in the experimental group were (1.504 +/- 0.681), (1.532 +/- 0.913), (1.358 +/- 0.791) s. The value of disclusion time during left lateral movements, right lateral movements and protrusion in the control group were (0.470 +/- 0.059), (0.483 +/- 0.045), (0.482 +/- 0.047) s. The results in the experimental group were significantly longer than those of control group (P < 0.01).
  
  
  CONCLUSIONS
  Although the patients achieved normal dentition after orthodontic treatment, their disclusion time were longer than those in healthy adolescents and young adults with normal occlusion.
authors.affiliation: Dept. of Orthodontics, School of Stomatology, Capitol Medical University, Beijing 100050, China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: An
authors.forename: Bangkang
authors.initials: B
authors.lastname: Wang
authors.forename: Yuxing
authors.initials: Y
authors.lastname: Bai
mesh_terms: D000293:Adolescent; D000328:Adult; D003766:Dental Occlusion; D006801:Humans; D008963:Molar; D014087:Tooth Movement Techniques; D055815:Young Adult