title: [Orthodontic retention and adjustment of the occlusion after orthognathic surgery].
abstract: OBJECTIVE
  To investigate the orthodontic retention and adjustment of the occlusion after orthognathic surgery.
  
  
  METHODS
  18 patients were divided into three groups. Group I: Cases with skeletal Class I bimaxillary protrusion treated by subapical osteotomy; Group II: Cases with skeletal Class II mandibular retrusion treated by sagittal split mandibular advancement surgery; Group III: Cases with skeletal Class III treated by Le Fort I osteotomy on maxilla and sagittal split osteotomy on mandible. There were 6 patients in each group. Three kinds of orthodontic elastic tractions were used based on different categories of malocclusion and different types of operation.
  
  
  RESULTS
  18 patients attained functional occlusion after the orthodontic occlusion adjustment. There was no relapse and malocclusion by surgery.
  
  
  CONCLUSIONS
  Intermaxillary elastics based on different categories of occlusion and different kinds of surgery can improve the occlusion after orthognathic surgery and attatin the functional occlusion.
authors: Dept. of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
authors: Yin-Zhong
authors: YZ
authors: Duan
authors: Jia-Li
authors: JL
authors: Tan
authors: Lei
authors: L
authors: Chen
authors: Fang
authors: F
authors: Ning