Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, MI 48109, USA.
Med Oral Patol Oral Cir Bucal. 2010 Jul 1;15(4):e663-6. doi: 10.4317/medoral.15.e663.
This study was conducted 1/ to find out the effects of anatomical sites and implant types on the magnification and 2/ to evaluate the inter-observer variability on the evaluation using the digital panoramas taken at daily practices.
Panoramic radiographs from 156 patients treated with implants were evaluated by three observers. The length was measured on the lateral aspect of the implant in 1:1 mode using image measurement program and the percent magnification was calculated. The inter-observer correlation coefficient was measured to express inter-observer variability using reliability analysis-scale.
The average magnification factor in the panoramic radiograph was 126.8 % in the vertical plane. Location within the anatomic arch showed different magnification by a minimum of 119.4 to a maximum of 130.8 %. The measurements among three examiners were well correlated showing correlation coefficient of 0.81. The differences between one side from the contralateral side was evaluated and it was shown that the differences were observed only seen maxillary anterior and upper premolar regions. Additionally, the external non-submerged group had the highest magnification value.
Digital panoramic radiographs showed sufficient accuracy and good inter-examiner agreement. The radiographic magnification of implant length was influenced by anatomical sites and implant types.
本研究旨在：1/ 找出解剖部位和种植体类型对放大效果的影响，以及 2/ 评估日常实践中拍摄的数字全景片评估的观察者间变异性。
对 156 名接受种植体治疗的患者的全景片进行了 3 位观察者的评估。使用图像测量程序，在 1:1 模式下在种植体的侧方测量长度，并计算百分比放大率。采用可靠性分析量表测量观察者间相关系数，以表示观察者间的变异性。
在垂直平面中，全景片的平均放大因子为 126.8%。解剖弓内的位置显示出不同的放大率，最小值为 119.4，最大值为 130.8%。三位检查者的测量结果相关性良好，相关系数为 0.81。对一侧与对侧的差异进行了评估，结果表明仅在上颌前牙和上颌前磨牙区域观察到差异。此外，非完全埋入式种植体组的放大值最高。
数字化全景片具有足够的准确性和良好的观察者间一致性。种植体长的放射照相放大受解剖部位和种植体类型的影响。
