| 徐晓静,沈云娟,陈慧霞.锥束CT多方式三维重建在上颌埋伏前牙定位中的应用[J].口腔材料器械杂志,2012,21(2):73-76. |
| 锥束CT多方式三维重建在上颌埋伏前牙定位中的应用 |
| Comprehensive application of multi-pattern three-dimensional surface reconstruction of cone-beam CT in localizing impacted teeth of anterior maxilla |
| 投稿时间：2012-01-04 修订日期：2012-03-08 |
| DOI：10.11752/j.kqcl.2012.02.04 |
| 中文关键词: 埋伏牙 锥束CT 三维重建 定位 上颌骨 |
| 英文关键词:Impacted teeth Cone-beam computed tomography Three-dimensional surface reconstruction Position Anterior maxilla |
| 基金项目:2011年常州市市级应用基础研究计划指导性项目(项目编号:CY20119014) |
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| 中文摘要: |
| 目的： 评价锥束CT三维重建在上颌埋伏前牙定位中的应用价值。方法： 对48例常规拍摄全颌曲面断层片和根尖片后不能准确判断埋伏牙的形态、位置及与邻牙关系的患者应用锥束CT进行扫描,再采用最大密度投影法(MIP)、多平面重建(MPR)、容积再现法(VR)获得立体三维图像,显示上颌埋伏前牙的形态、位置及与邻牙关系。运用正畸开辟间隙和外科暴露联合正畸牵引导萌术,结合直丝弓矫治技术,直接粘贴托槽牵引导萌上颌埋伏牙。结果： 经三种方式重建处理后,48例病例均清晰显示上颌埋伏前牙的形态、位置及与邻牙关系。结论： 锥束CT多方式三维重建为上颌埋伏前牙定位诊断提供更为客观的依据。 |
| 英文摘要: |
| Objective: To evaluate the clinical value of three-dimensional surface reconstruction of Cone-beam CT in localizing impacted teeth of anterior maxilla. Methods: CBCT was performed in 48 cases whose anterior maxillary impacted teeth couldn't be judged clearly through the panoramic radiograph or periapical films. Three-dimensional surface reconstruction,including MIP(maximum intensity projection),MPR(multi planar reconstruction),VR(volume rendering) was made to display the impacted teeth's shape,location and their relationship with adjacent teeth. Use of orthodontic open gap and surgical exposure together with orthodontics leads and guides impacted teeth,combined with the straight wire technique of direct bond brackets guiding impacted maxillary teeth eruption. Results: In 48 cases，the reconstruction image including the crown,root,neck and root bifurcation in a three-dimensional form,location and relation with dentition in anterior maxilla. Conclusions: Application of multi-pattern three-dimensional surface reconstruction of cone-beam CT is an accurate and effective method to examine impacted teeth of anterior maxilla. |
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