Reddy M S, Mayfield-Donahoo T, Vanderven F J, Jeffcoat M K
Department of Periodontics, University of Alabama, School of Dentistry, Birmingham 35294-0007, USA.
Clin Oral Implants Res. 1994 Dec;5(4):229-38. doi: 10.1034/j.1600-0501.1994.050406.x.
This study evaluated the advantages of computed tomography (CT) in comparison to routine panoramic radiography for dental implant treatment planning. An in vitro validation study was performed to assess the accuracy of CT and panoramic radiography film images for measurement of anatomic structures and distances between anatomic structures. After correcting by a standard 25% magnification on the panoramic images, a significant difference in measurements was found between the CT and panoramic radiography images. Ten subjects requiring implants in compromised ridges were treatment planned with either CT and panoramic radiographs or panoramic radiographs alone. The ideal implant length was determined at surgery with direct digital radiography. The dentists were significantly more confident using CT and panoramic images than panoramic radiographs alone. Implant length treatment planned with panoramic radiography alone underestimated length significantly compared with the implant length determined to be ideal during surgery, whereas treatment planning with CT and panoramic radiography demonstrated no significant difference. The data indicate the CT may be of value in treatment planning for dental implants, especially when gaining maximum length is of critical importance.
本研究评估了计算机断层扫描（CT）相较于常规全景X线摄影在牙种植治疗计划中的优势。进行了一项体外验证研究，以评估CT和全景X线摄影胶片图像在测量解剖结构及解剖结构之间距离方面的准确性。在对全景图像进行标准的25%放大校正后，发现CT图像和全景X线摄影图像在测量结果上存在显著差异。对10名需要在骨量不足的牙槽嵴植入种植体的受试者，分别采用CT和全景X线片或仅用全景X线片进行治疗计划。手术时通过直接数字化X线摄影确定理想的种植体长度。与仅使用全景X线片相比，牙医使用CT和全景图像时明显更有信心。仅用全景X线片进行种植体长度治疗计划时，与手术中确定的理想种植体长度相比，显著低估了长度，而使用CT和全景X线片进行治疗计划则无显著差异。数据表明，CT在牙种植治疗计划中可能具有价值，尤其是在获取最大种植体长度至关重要时。
