DENTAL CONE BEAM CT AND ITS JUSTIFIED USE IN ORAL HEALTH CARE
DENTAL CONE BEAM CT AND ITS JUSTIFIED USE IN ORAL HEALTH CARE
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DOI：
10.5334/jbr-btr.662
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发表时间：
2011-09-01
期刊：
影响因子：
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通讯作者：
Jacobs, R.
中科院分区：
文献类型：
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作者：
Jacobs, R.
虽然牙科2D放射学仍然是最常见的诊断工具，但颌骨和牙齿的固有性质肯定会从3D诊断中受益。如今，牙锥束计算机断层扫描可以以较低的辐射剂量和成本提供高质量的图像。然而，CBCT机器的有效剂量范围很容易从10-1200微西弗变化，相当于2到240张牙科全景X光片。诊断图像质量也是如此，它在机器和参数设置之间表现出巨大的差异。对于分割精度，精度下限约为200微米，但同样，更大的不准确性可能适用。对于线性精度，500微米以下的值是可行的，某些机器和CBCT参数设置允许线性精度高达200微米。除了放射诊断的可能性，牙科锥束CT还可能提供巨大的治疗潜力，包括通过牙冠或植入物的CAD/CAM解决方案进行外科指导和进一步治疗的可能性。综上所述，对于颌骨和颌面外科、牙髓再治疗、创伤、颌骨病变和TMJ病理等特殊适应症，牙科CBCT成像是合理的。然而，CBCT的优化和合理性指南是强制性的，特别是在用于儿科适应症时。
While dental 2D radiology is still the most frequent diagnostic tool, the inherent nature of jaws and teeth might surely benefit from 3D diagnosis. Nowadays, dental cone beam computed tomography may offer high quality images at low radiation doses and costs. Yet, effective dose ranges of CBCT machines may easily vary from 10-1200 microsievert, being an equivalent of 2 to 240 dental panoramic radiographs. The same holds true for diagnostic image quality, which exhibits a huge variation amongst machines and parameter settings. For segmentation accuracy, lower limits of accuracy are around 200 micrometer, yet again, larger inaccuracies may apply. For linear accuracies, values below 500 micrometer are feasible, with some machines and CBCT parameter settings allowing linear accuracies of up to 200 micrometer. Apart from the radiodiagnostic possibilities, dental cone beam CT may offer a vast therapeutic potential, including possibilities for surgical guidance and further treatment via CAD/CAM solutions for crown and bridgework on teeth or implants. In conclusion, dental CBCT imaging could be justified when dealing with specific indications including jaw bone and maxillofacial surgery, endodontic retreatment, traumata, jaw bone lesions and TMJ pathology. Yet, guidelines for CBCT optimisation and justification are mandatory, especially when used for pediatric indications.