锥形束计算机断层扫描评估正畸治疗过程中的牙根长度和边缘骨水平。
Cone beam computed tomography for assessment of root length and marginal bone level during orthodontic treatment.
机构信息
Department of Oral and Maxillofacial Radiology, University of Gothenburg, Sweden.
出版信息
Angle Orthod. 2010 May;80(3):466-73. doi: 10.2319/072909-427.1.
Abstract
OBJECTIVE
To evaluate the accuracy and precision of cone beam computed tomography (CBCT) with regard to measurements of root length and marginal bone level in vitro and in vivo during the course of orthodontic treatment.
MATERIALS AND METHODS
Thirteen patients (aged 12-18 years) from an ongoing study and a dry skull were examined with CBCT using multiplanar reformatting for measurements of root length and marginal bone level. For in vivo evaluation of changes in root length, an index according to Malmgren et al was used, along with a modification of this method.
RESULTS
The in vitro mean difference between physical and radiographic measurements was 0.05 mm (SD 0.75) for root length and -0.04 mm (SD 0.54) for marginal bone level. In vivo the error was <0.35 mm for root length determinations and <0.40 mm for marginal bone level assessments.
CONCLUSION
Despite changes in tooth positions, the CBCT technique yields a high level of reproducibility, enhancing its usefulness in orthodontic research.
摘要
目的
评估锥形束 CT（CBCT）在正畸治疗过程中体外和体内测量牙根长度和边缘骨水平的准确性和精密度。
材料与方法
对来自一项正在进行的研究中的 13 名患者（年龄 12-18 岁）和一具干颅骨进行 CBCT 检查，使用多平面重建成像来测量牙根长度和边缘骨水平。为了评估牙根长度的变化，使用了 Malmgren 等人提出的指数，并对该方法进行了改进。
结果
体外实验中，牙根长度的实际测量值与放射学测量值的平均差值为 0.05 毫米（标准差 0.75），边缘骨水平的差值为-0.04 毫米（标准差 0.54）。体内实验中，牙根长度测量的误差<0.35 毫米，边缘骨水平评估的误差<0.40 毫米。
结论
尽管牙齿位置发生了变化，但 CBCT 技术具有高度的可重复性，这增强了它在正畸研究中的有用性。
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