目的：探讨锥形束CT检查在颌骨内埋伏牙定位中的应用。方法对55例埋伏牙患者行锥形束CT检查，通过数据处理获得任意平面图像、曲面断层图像及牙体表面三维立体图像，从而获得埋伏牙的准确定位。结果55例87颗埋伏牙通过锥形束CT多种重建技术的组合应用，均得以清晰显示埋伏牙的位置、形态、大小、萌出方向及其与周围组织的关系，且定位情况与术中埋伏牙实际位置情况一致，诊断准确率100%。术后创口均一期愈合，无感染、邻牙压根和根尖血管损伤等并发症发生。结论锥形束CT检查可提供埋伏牙位置的准确数据，为治疗方案的选择提供客观依据，具有重要的临床应用价值。%Objective To evaluate the application of cone beam computed tomography (CT) in locating of embedded teeth in jaw. Methods Fifty five patients with 87 embedded teeth in jaw were scanned by cone beam CT.The exact location of the embedded teeth in jaws was acquired by using multiplanar reconstruction from difference direction images,panoramic im-ages and the three- dimensional images. Results The location, shape,size,erupted orientation and relationship with surround-ing tissues of 87 embedded teeth in 55 patients were displayed clearly by cone beam CT. The positions were completely con-firmed by surgery. The minimal intraoperative trauma and no postoperative complications were achieved by the accurate choice of surgical approaches. Conclusion Cone beam CT can provide detailed information and objective evidence of embedded teeth in jaw, which is of value in planning clinical treatment.
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