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Published on: October 18, 2021
[Clinical trial on intrusion of overerupted maxillary molars with microscrew]
Xue-fang Ding1, Yan-heng Zhou, Xue-mei Gao
1Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Objective:
To investigate the imtrusion of overerupted molars with microscrews as anchorage.
Methods:
Thirteen adult patients were treated with microscrew anchorage and fixed appliances. Twenty-three overerupted posterior maxillary teeth were intruded. The intrusive movement was investigated on cephalometric radiographs.
Results:
The molars were intruded and the occlusal plane was corrected successfully in all patients. The treatment period of intrusion was from 5 to 18 months (mean 10.4 months). Significant true intrusion of overerupted maxillary molars, ranged from 0.45 mm to 7.00 mm [mean (2.86 +/- 1.80) mm], was achieved (P < 0.001). The apical root resorption was not clinically significant and the bone level was unchanged.
Conclusions:
The microscrew anchorage and fixed appliances were applicable and efficacious for intrusion of overerupted maxillary molars.