Larheim T A, Eggen S
Oral Surg Oral Med Oral Pathol. 1979 Oct;48(4):374-8. doi: 10.1016/0030-4220(79)90038-0.
A simple radiographic measuring method is presented. Fifty teeth to be extracted were radiographed by means of a standardized paralleling technique and a preprinted intraoral radiographic film. The measuring grid was conveyed to the film as a latent pattern by a stenciling process prior to the x-ray exposure. The distance between the measuring lines was adjusted in accordance with the image magnification. The length of the teeth was read directly on the completed radiograph. The extracted teeth were measured by means of a sliding caliper. A statistical analysis of the data indicated that the present method is more accurate than other clinical methods commonly used for determination of tooth lengths.
本文介绍了一种简单的放射测量方法。采用标准化平行投照技术和预印的口腔内X线胶片，对50颗待拔除的牙齿进行X线摄影。在X线曝光前，通过模版印刷工艺将测量网格作为潜影图案转移到胶片上。测量线之间的距离根据图像放大率进行调整。牙齿的长度可直接在完成的X线片上读取。拔除的牙齿用游标卡尺进行测量。数据的统计分析表明，本方法比其他常用于测定牙齿长度的临床方法更准确。
