Chaitanya Nallan Csk, Padmanabhan Vivek, Islam Md Sofiqul, Hashim Nada Tawfig, Mohammed Riham, Allam Neeharika Satyajyothi, Omar Jouma Jalal, Zakaria Ahmed, Pranathi Shaga, Apoorva Mamindla
Department of Oral Radiology and Oral Medicine, RAK College of Dental Sciences, RAK Medical and Health Sciences University, Ras Al Khaimah, United Arab Emirates.
Department of Pedodontics, RAK College of Dental Sciences, RAK Medical and Health Sciences University, Ras Al Khaimah, United Arab Emirates.
Front Oral Health. 2024 Dec 20;5:1498117. doi: 10.3389/froh.2024.1498117. eCollection 2024.
Intraoral radiography remains the most widely employed dental radiographic technique for producing geometrically accurate images with minimal distortion and magnification. Despite its common use in the dental office, incorrect projection geometry can be challenging leading to image distortions. To mitigate these inaccuracies specific radiographic landmarks on the face are utilized during periapical radiography. Nallan's lines, proposed in this study may address the perpetual issue.
In this cross over study, the participants were divided into 2 groups, Group A and Group B comprising nine in the each group. The bisecting angle technique was performed by the participants using a gyroscopic device fitted with a LASER with (Study subjects) and without (Controls) utilizing Nallan's lines on a selected group of teeth using a phantom model. Subsequent images were compared with those images obtained by an oral radiologist using the same model for geometric distortions of the images. This comparative analysis aimed to identify potential geometric distortions within the generated images.
A paired -test was employed to compare the mean length and breadth of teeth before and after radiographic training. Additionally, a McNemar Test was used to assess the impact of Nallan's lines on technical errors. Both analyses revealed statistically significant improvements post-training ( < 0.01). To determine if radiographic training affected the performance of volunteers and specialists, a Chi-Square Test was conducted to compare error rates. No statistically significant differences were observed between the two groups, both before and after training.
The adoption of Nallan's lines may enhance the accuracy and quality of intraoral radiographic images. By adhering to this geometric framework dental practitioners can minimize geometric distortions and thereby repeated radiographic exposures of patients.
口腔内放射摄影术仍然是应用最广泛的牙科放射技术，用于生成几何形状精确、失真和放大率最小的图像。尽管它在牙科诊所中普遍使用，但不正确的投影几何形状可能具有挑战性，会导致图像失真。为了减轻这些不准确性，在根尖周放射摄影期间会利用面部特定的放射学标志。本研究中提出的纳兰线可能解决这一长期存在的问题。
在这项交叉研究中，参与者被分为两组，A组和B组，每组各有9人。参与者使用配备激光的陀螺仪设备，在一组选定的牙齿上，对（研究对象）和（对照组）使用纳兰线，采用平分角技术，使用模型进行操作。随后将图像与口腔放射科医生使用相同模型获得的图像进行比较，以检查图像的几何失真情况。这种比较分析旨在识别生成图像中潜在的几何失真。
采用配对检验比较放射摄影训练前后牙齿的平均长度和宽度。此外，使用麦克尼马尔检验评估纳兰线对技术误差的影响。两项分析均显示训练后有统计学显著改善（<0.01）。为了确定放射摄影训练是否影响志愿者和专家的表现，进行了卡方检验以比较错误率。训练前后两组之间均未观察到统计学显著差异。
采用纳兰线可能会提高口腔内放射图像的准确性和质量。通过遵循这种几何框架，牙科从业者可以将几何失真降至最低，从而减少患者的重复放射摄影曝光。
