RADIOGRAPHIC METHODS IN THE EVALUATION OF PERIODONTAL THERAPY
RADIOGRAPHIC METHODS IN THE EVALUATION OF PERIODONTAL THERAPY
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DOI：
10.1902/jop.1992.63.12s.1078
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发表时间：
1992-12-01
影响因子：
4.3
通讯作者：
REDDY, MS
中科院分区：
文献类型：
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作者：
REDDY, MS
放射学方法通常用于临床试验中评估牙周骨变化。X线照片作为数据源是独一无二的，因为它们提供了骨支持的永久性视觉记录，并允许对牙周病变进行线性、面积和体积测量。使用影像学结局指标的主要限制因素是几何失真和影像学处理误差。标准化方法和计算机算法的使用减少了这些误差对射线照片数据的影响。临床试验中的放射学分析主要是通过使用摄像机间接数字化胶片以数字格式进行的。直接数字探测器现在可用于口腔内使用。直接探测器的使用消除了对胶片处理的需要，并允许剂量减少。目前可用的探测器在尺寸和分辨率方面受到限制。减影X线摄影允许对骨增加或丢失的面积和体积进行估计。减法方法是高度精确的，但也是技术上严格和劳动密集型的。临床试验假设、尺寸、长度和所需的准确性应是选择放射学方法的最终考虑因素。
RADIOGRAPHIC METHODS ARE COMMONLY UTILIZED to assess periodontal bone changes in clinical trials. Radiographs are unique as a data source in that they provide a permanent visual record of the bone support and allow for linear, area, and volume measurements of periodontal lesions. The major limiting factors in the use of radiographic outcomes measures are geometric distortion and radiographic processing errors. The use of standardized methods and computer algorithms has reduced the effect of these errors on data from radiographs. Radiographic analysis in clinical trials is largely done in digital format by indirect digitizing film with a video camera. Direct digital detectors are now available for intra-oral use. The use of a direct detector eliminates the need for film processing and allows for dose reduction. The detectors currently available are limited in size and resolution. Subtraction radiography allows for area and volume estimates of bone gain or loss. The subtraction methods are highly precise, but are also technically exacting and labor intensive. The clinical trial hypothesis, size, length, and accuracy required should be the final consideration in choosing a radiographic method.