摘要
目的通过测量与正畸微种植体植入相关的牙体距离和软组织距离，确定上颌后牙区正畸微种植体支抗植入的安全区。方法采用21例正畸前患者颅面部锥形束CT扫描重建图像，使用测量软件测量上颌左右两侧后牙区距水平面6、8、10、12、14、16mm处相邻两牙牙根的近远中距离，游标卡尺测量双侧上颌后牙临床牙冠的高度，牙周探针测量双侧上颌后牙区附着龈的宽度。结果上颌第二前磨牙和第一磨牙近中颊根之间的近远中距离最大，上颌第一前磨牙的牙冠高度最大，上颌第二磨牙的附着龈宽度最大。结论上颌后牙处微种植体植入的安全区位于上颌第二前磨牙与第一磨牙之间，距相邻两牙颊尖连线垂直高度10～11mm处。
Objective This study aimed to measure the distance between a tooth and a soft tissue. This study also aimed to determine the safe region of micro-implant for orthodontic anchorage positioning in the posterior maxillary alveolar bone. Methods Twenty-one cone beam computed tomography reconstruction images of the craniofacial bone of pre- orthodontic patients were used in this research. Both sides of the mesiodistal distance of the two adjacent teeth in the posterior maxillary alveolar bone were measured at 6, 8, 10, 12, 14, and 16 mm from the horizontal plane. A vernier caliper was used to measure the clinical crown height of the posterior maxillary teeth in the plaster maxillary dentition model. A periodontal probe along the long axis of a tooth was used to determine the width of the free gingiva and the width from the gingival margin to the mucogingival junction. Results In the posterior area of the maxilla, the widest mesiodistal distance of tooth roots was between the second premolar and the first molar. Among the teeth, the maxillary first premolar yielded the highest crown height. The maxillary second molar region showed the widest attached gingiva. Conclusion The safe region of the micro-implant is located in the second premolar and the first molar; the vertical distance from the horizontal plane is 10-11 ram.
出处
《国际口腔医学杂志》
CAS
北大核心
2015年第6期659-663,共5页
International Journal of Stomatology
基金
辽宁省自然科学基金(201202235)
关键词
微种植体
安全区
支抗
micro-implant
safe region
anchorage
