Treatment of maxillary protrusion in adult with self-tapping micro-screw implants

VernacularTitle:应用自攻型种植体支抗治疗成年上牙弓前突的临床初探
Author: Da-Wei WANG ¹ ; Zhi-Cai FENG ; Shuang-Lin ZHU ; Xin-Hua LU ; Hong ZHANG
Author Information

1. 中山大学光华口腔医学院
Keywords: Orthodontic anchorage procedures; Malocclusion; Implant anchorage; Stability
From: Chinese Journal of Stomatology 2008;43(1):16-20
CountryChina
Language:Chinese
Abstract: Objective To investigate the position change of upper molars and incisors in order to evaluate the stability of posterior anchorage with the application of micro-screw implant. Methods Eight adult patients with severe maxillary protrusion were included. Upper first premolars were extracted and upper posterior anchorage was reinforced with micro-screw implant in all patients. Cephalometric and cast analyseswere carried out to record the position change of molar and micro-screw. Results During treatment the micro-screw implants kept stable in sagittal and vertical plane.Neither the mesial-distal movement nor the tipping of the upper molars during the treatment was statistically significant(P＞0.05).The edge of upper incisors was retracted by 6.86 mm and the tipping was reduced by 18.03°.The center of resistance was intruded by 3.28 mm on average. Significant change was observed(P＜0.01).Conclusions Micro-screw implant could provide good anchorage control in the orthodontic treatment.