摘要
目的应用自攻型种植体支抗治疗成年上牙弓前突，评价种植体支抗的疗效。方法选取严重上牙弓前突成年患者8例，其中男性3例，女性5例，年龄18～31岁。在上颌第二前磨牙与第一磨牙间植入种植体，以两步法内收上前牙，通过X线头影测量方法观察种植体、磨牙、尖牙及切牙在矢状和垂直方向上的位置变化；配对t检验比较治疗前后的差异。结果治疗后种植体头部、体部及尾部的矢状向位移分别为（0．42±0.50）mm、（0.18±0．35）mm、（-0．15±0．47）mm，垂直向位移分别（0．12±0．21）mm、（0．24±0．36）mm、（0．26±0．48）mm；上颌第一磨牙矢状向位移为（0．70±2．45）mm，轴倾度增大（2．06±1．70）。治疗前后比较，差异均无统计学意义（P〉0．05）。治疗后上颌切牙切端平均水平内收6．86mm，切牙牙轴平均减少18．03°，切牙阻抗中心平均压入3．28mm，尖牙平均远移6．83mm，差异均有统计学意义（P〈0．01）。结论种植体支抗可实现理想的支抗控制效果。
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 analyses were 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 The edge of upper incisors was retracted by 6. 86 mm and the tipping was reduced by 18. 03°.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.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2008年第1期16-20,共5页
Chinese Journal of Stomatology
关键词
正畸支抗
错骀
种植体支抗
稳定性
Orthodontic anchorage procedures
Malocclusion
Implant anchorage
Stability
