三维CT技术在牙槽突裂整复中的应用

在牙槽突裂治疗中，影像学评估至关重要，在植骨术前术后常规都会对牙槽突裂患者拍摄X线头颅全景片进行评估，但二维影像存在着影像重叠及模糊等问题。近年来，随着三维CT技术的不断发展，螺旋CT、锥形束CT等技术在121腔医学领域开始广泛应用。在牙槽突裂整复中，三维CT可用于评估术前裂隙大小、植骨术后的效果观察、计算术后植入骨吸收量等，并能以三维重建的方式较为直观地展示裂隙区域。除此之外，与常规螺旋CT相比，锥形束CT还具有价格便宜、辐射量小、清晰度高等优点。

Application progress of three-dimensional CT used in alveolar cleft bone grafting

In the treatment of alveolar cleft, imaging evaluation is essential. Panoramic films are often used in evaluation of alveolar cleft before and after the surgery of bone grafting, but there are some shortages of conven- tional two-dimensional image. Recently, three-dimensional CT was widely used in dental clinic. In the treatment of alveolar cleft, three-dimensional CT can be used in assessment of the size of alveolar cleft, evaluation of the result of bone graft surgery, calculating the volume of bone absorbed after implantation. Compared with spiral CT, cone beam CT has many advantages, such as lower cost, smaller radiation, higher resolution et cetera.