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[Orthodontic retention and adjustment of the occlusion after orthognathic surgery]
Yin-Zhong Duan1, Jia-Li Tan, Lei Chen
1Dept. of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
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.
Conclusion:
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.
