摘要
目的:通过对患者治疗前、后X线头影测量分析,探讨利用微钛钉种植体支抗牵引上、下牙列,整体远中移动矫治成人轻、中度双牙弓前突的新途径。方法:15例双牙弓轻、中度前突的成年患者,拔除第三恒磨牙,上颌种植钉植入颧牙槽嵴,下颌种植钉植入内、外斜线颊棚区,利用镍钛螺旋弹簧牵引上、下牙列,整体向远中移动。对所有病例矫治前、后的头颅定位侧位片、全口曲面体层片进行测量,采用SPSS13.0软件包对所得数据进行统计学分析。结果:160颗微钛钉种植体均保持稳固。2SNA、SNB等骨骼方面的测量值矫治前、后无显著改变(P>0.05);U1/NA、U1-NA、L1/NB、L1-NB、U1/L1的变化差异具有显著性(P<0.05),表明上、下前牙突度和倾斜度明显减小。3鼻唇角(Cm-SnUL)、颏唇沟角(LL-B’-Pos)治疗后显著增大(P<0.01),上、下唇相对于审美平面的突度减小,鼻、唇、颏的协调关系明显改善,面部侧貌改善。4上、下颌磨牙、切牙均不同程度远中移动。结论:微钛钉种植体能提供稳定的支抗,牵引上、下牙列整体远中移动,矫治成人轻、中度双牙弓前突,硬组织和软组织均发生明显变化。
PURPOSE： In this study, micro-implants were used in 15 adult patients with mild and moderate bimaxillary arch protrusion or crowding. Cephalometric analysis was used to analyze hard and soft-tissues change before and after treatment, with the aim to investigate the effects of treatment on adult bimaxillary arch protrusion with micro-implant anchorage. METHODS： Fifteen adult patients with mild and moderate bimaxillary arch protrusion were selected in this study. Micro-implants were inserted into the zygomaticoalveolar ridge of maxilla and the external oblique line of mandible.A Ni Ti coil spring was attached to the micro-implant to drag the whole upper and lower dentition for distal movement.Cephalometrics were taken before and after treatment, and the changes of soft and hard-tissue profile were studied.SPSS13.0 software package was used to analyze the data. RESULTS： 1 Sixty micro-implants remained stable. 2 SNA,SNB had no significant changes（P 0.05）, and the relationship between the maxilla and the mandible did not change significantly. U1/NA, U1-NA, L1/NB, L1-NB and U1/L1 changes in hard tissue had significant difference in cephalometric measurement（P0.05）. The upper and lower anterior teeth were more retrusive, and the tipping of incisor decreased significantly. 3 Cephalometric analysis showed that lateral appearance improved and soft tissue cephalometricrelated measurements such as Cm-Sn-UL,LL-B＇-Pos increased significantly（P0.01）. 4 Molars and incisors acquired distal movement. CONCLUSIONS： Micro-implant can provide not only excellent skeletal anchorage but also a novel way to distalize the whole dentition efficiently.
出处
《上海口腔医学》
CAS
CSCD
2015年第1期76-82,共7页
Shanghai Journal of Stomatology
基金
国家自然科学基金(81060089)~~
关键词
微种植体支抗
双牙弓前突
整体远中移动
Micro-implant anchorage
Bimaxillary arch protrusion
Whole dentition distalization movement
