Holm G
Swed Dent J. 1997;21(5):199-204.
A technique is presented for calculating the amount of bone support as a percentage of the total tooth length measured on intra oral x-ray pictures. An evaluation was made of differences in total tooth length of 1128 teeth recorded in 1979 and in 1989. The differences found in the ten year period were minimal (0.3%). Between 1979 and 1989 0.7% or 2 mm of the bone support was lost. The accuracy obtainable by the use of measurements from x-ray pictures taken by trained personnel was found to be satisfactory. This indicate that the method could be of value for comparison of changes in mesial and distal bone support over a period of time. The advantages of using bone support measurements instead of attachment level measurements are several: ease of reevaluation of initial values, the patient does not have to be present the whole time, and properly trained dental assistants can make the measurements.
本文介绍了一种计算骨支持量的技术，骨支持量以口腔内X光片上测量的牙齿总长度的百分比来表示。对1979年和1989年记录的1128颗牙齿的总牙长差异进行了评估。在这十年期间发现的差异极小（0.3%）。1979年至1989年期间，骨支持量丧失了0.7%或2毫米。研究发现，由训练有素的人员拍摄的X光片测量结果的准确性令人满意。这表明该方法对于比较一段时间内近中及远中骨支持的变化可能具有价值。使用骨支持量测量而非附着水平测量有几个优点：便于重新评估初始值，患者不必全程在场，并且经过适当培训的牙科助手即可进行测量。
