种植体支抗对高角拔牙病例垂直向控制的颌(牙合)面改变

种植体支抗对高角拔牙病例垂直向控制的颌(牙合)面改变欧阳莉;周彦恒;傅民魁;丁鹏

【期刊名称】《中华口腔正畸学杂志》

【年(卷),期】2009(016)001

【摘要】Objective To exp0lore the clinical application of posterior vertical control of high angle extraction cases through molar intrusion by microscrew implant anchorage.Methods 20 patients with high mandibular plane angle and Class Ⅰ or Ⅱ skeletal relationships were selected for the current study ,all of them had been treated with extraction and MBT straight wire technique. MAS microscrews were implanted in the buccal alveolar bone between the 1st and 2nd molars,posterior vertical control was carried out throuth molar intrusion by microscrew implant anchorage,and microscrews were also used as the maximum anchorage for space closure through sliding mechanics.Results Cephalomeric analysis for treatment results showed that upper molars were intruded by 2.27 mm in average;MP/SN angle decreased by 2.8°and SNPo angle increased by 1.34°in average;NsPos/FH angle increased by 3.18°respectively in average,significant differences(P<0.001)were found in all the changes.Conclusions Microscrew implant anchorage can provied effective posterior vertical control for hith angle extraction cases through molar intrusion,patietns'facial profile had been improved