Seliem Essam Nassef, Attia Khaled Hazem, Al-Hadithiy Saba, Mostafa Yehya Ahmed
Orthodontic Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
World J Orthod. 2009 Winter;10(4):301-4.
The purpose of this study was to compare the accuracy of cephalometric soft tissue linear measurements obtained from conventionally traced cephalograms with those taken directly on patients. This study was conducted on 11 orthodontic patients. Small pieces of orthodontic wire were fixed on five soft tissue landmarks in the midline of the face of each patient. Five linear measurements were taken directly on each patient's face using an electronic Boley gauge reading to the nearest 0.05 mm. Also, a lateral cephalogram was taken of each patient with the aforementioned wires still in place. Using the same gauge, the same linear measurements were taken from the tracings of all cephalograms. The two sets of readings were statistically analyzed using the concordance correlation coefficient and Pearson correlation coefficient. The study concluded that soft tissue measurements on lateral cephalometric radiographs do not give reliable values. A single magnification factor cannot be applied for lateral cephalometric soft tissue measurements in all patients, nor within the same patient.
本研究的目的是比较从传统描记的头影测量片获得的头影测量软组织线性测量值与直接在患者身上测量的结果的准确性。本研究对11名正畸患者进行。将小段正畸钢丝固定在每位患者面部中线的五个软组织标志点上。使用电子博利测径器在每位患者面部直接进行五次线性测量，精确到最接近的0.05毫米。此外，在上述钢丝仍在位的情况下，为每位患者拍摄一张侧位头影测量片。使用相同的测径器，从所有头影测量片的描记中进行相同的线性测量。使用一致性相关系数和皮尔逊相关系数对两组读数进行统计分析。研究得出结论，侧位头影测量X线片上的软组织测量值不可靠。不能对所有患者或同一患者的侧位头影测量软组织测量应用单一放大系数。
