Distal movement of the mandibular dentition in the treatment of patients with Class Ⅲ skeletal pattern

VernacularTitle:远移下颌磨牙矫治骨性Ⅲ类错(牙合)畸形的临床研究
Author: Lan MOU ¹ ; Gengchi XU ; Yaohui HAN ; Zhenlin GE
Author Information

1. 730030,兰州大学口腔医学院正畸科
Keywords: Malocclusion,Angle Class Ⅲ; Tooth movement; Orthodontic anchorage procedures; Mini-screw
From: Chinese Journal of Stomatology 2015;50(6):373-377
CountryChina
Language:Chinese
Abstract: Objective To evaluate the outcome of patients with skeletal Class Ⅲ malocclusion treated with extraction of mandibular third molars and distalization of molars using implant anchorage combined with MBT appliance.Methods Fifteen patients(mean age 24.0 ± 5.8) with skeletal Class Ⅲ malocclusion were selected.The mandibular third molars were extracted and the mandibular molars were moved distally using implant combined with MBT appliance.Cephalometric analysis was carried out before and after treatment.Results After active treatment,ANB,Wits distance,AB-NP and the distance between upper and lower lip position to SnPg' increased by 1.65°± 1.04°,(4.39± 1.93) mm,3.20°± 1.61° and (1.13±0.99) mm,respectively.The differences were statistically significant(P ＜ 0.05).Conclusions The skeletal Class Ⅲ patients in the permanent dentition could be treated successfully with extraction of mandibular third molars and distalization of mandibular molars using implant anchorage combined with MBT appliance.The soft-tissue profile was improved.