Evaluation of the effects of postprocessing settings in digital bitewing radiographs on proximal caries detection

IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Mehrdad Abdinian, Forooz Keshani, Fateme Sadeghi, Parisa Soltani, Gianrico Spagnuolo, Carlo Rengo
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Abstract

Objective

Radiographs are an integral part of detecting proximal caries. The aim of this study was to evaluate the effect of contrast, brightness, noise, sharpness, and γ adjustment of digital intraoral radiographs on the diagnosis of proximal caries.

Materials and methods

In this in vitro study, 40 extracted teeth including 20 premolars and 20 molars with enamel lesions (white spot or dentin discoloration seen through the enamel) were mounted together in groups of eight inside the skull. Bitewing radiographic images of each dental group were obtained by a photostimulable phosphor plate sensor with exposure conditions of 8 mA, 70 kV, and 0.2 s. The images were reconstructed by the built-in software and examined by two oral and maxillofacial radiologists in various settings of contrast, brightness, sharpness, noise, and γ. The teeth were then cut mesiodistally and the presence or absence of caries was confirmed by an oral and maxillofacial pathologist using a stereomicroscope. The data were then analyzed using the κ agreement coefficient, sensitivity, specificity, and accuracy (α = .05).

Results

Adjustment of brightness and contrast led to higher diagnostic performance with an accuracy of 82.5% and 83.8 (for observers 1 and 2, respectively) and 82.5% (for both observers), respectively. Noise adjustment was the least helpful approach for diagnosis of proximal dental caries among other adjustments, with an accuracy of 78.8% and 77.5% for observers 1 and 2, respectively.

Conclusion

Brightness and contrast setting was more efficient in improving the diagnostic potential of bitewing radiographs compared to other adjustments.

Abstract Image

评估数字咬翼X光片后处理设置对近端龋齿检测的影响
目的 X 光片是检测近端龋不可或缺的一部分。本研究旨在评估数字口内X光片的对比度、亮度、噪声、锐度和γ调整对诊断近端龋的影响。 材料和方法 在这项体外研究中,将 40 颗有釉质病变(透过釉质看到白斑或牙本质变色)的拔牙(包括 20 颗前臼齿和 20 颗臼齿)以 8 颗为一组装在头骨内。每组牙齿的咬翼射线图像都是通过光刺激荧光板传感器获得的,曝光条件为 8 mA、70 kV 和 0.2 秒。图像由内置软件重建,并由两名口腔颌面部放射科医生在不同的对比度、亮度、清晰度、噪声和 γ 设置下进行检查。然后在中线切开牙齿,由口腔颌面部病理学家使用体视显微镜确认是否存在龋齿。然后使用κ一致系数、灵敏度、特异性和准确性(α = .05)对数据进行分析。 结果 调整亮度和对比度可提高诊断性能,准确率分别为 82.5%、83.8%(观察者 1 和观察者 2)和 82.5%(两位观察者)。在其他调整中,噪声调整对诊断近端龋齿的帮助最小,观察者 1 和观察者 2 的准确率分别为 78.8% 和 77.5%。 结论 与其他调整相比,亮度和对比度设置能更有效地提高咬翼X光片的诊断潜力。
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来源期刊
Clinical and Experimental Dental Research
Clinical and Experimental Dental Research DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
3.30
自引率
5.60%
发文量
165
审稿时长
26 weeks
期刊介绍: Clinical and Experimental Dental Research aims to provide open access peer-reviewed publications of high scientific quality representing original clinical, diagnostic or experimental work within all disciplines and fields of oral medicine and dentistry. The scope of Clinical and Experimental Dental Research comprises original research material on the anatomy, physiology and pathology of oro-facial, oro-pharyngeal and maxillofacial tissues, and functions and dysfunctions within the stomatognathic system, and the epidemiology, aetiology, prevention, diagnosis, prognosis and therapy of diseases and conditions that have an effect on the homeostasis of the mouth, jaws, and closely associated structures, as well as the healing and regeneration and the clinical aspects of replacement of hard and soft tissues with biomaterials, and the rehabilitation of stomatognathic functions. Studies that bring new knowledge on how to advance health on the individual or public health levels, including interactions between oral and general health and ill-health are welcome.
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