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首页> 外文期刊>Dental and Medical Problems >Reproducibility of Linear Measurements Performed with 3-D Cone Beam Computed Tomography: Scan Reconstructions in Region of Pterygomaxillary Junction
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Reproducibility of Linear Measurements Performed with 3-D Cone Beam Computed Tomography: Scan Reconstructions in Region of Pterygomaxillary Junction

机译：用3-D锥形束计算机断层摄影术执行的线性测量的可重复性：上颌翼交界处的扫描重建

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Abstract Background . Pterygomaxillary dysjunction is the most dangerous part of Le Fort I osteotomy. Preoperative evaluation of the patient’s anatomy in 3D imaging software may help to choose an appropriate surgical approach and minimize the risk of the operation. Objectives . The aim of this study was to evaluate the reproducibility of linear measurements performed at the pterygomaxillary junction using open source software. Material and Methods . The study population consisted of 101 patients who underwent a CBCT examination for reasons independent of this study. Eight anatomical landmarks in the pterygomaxillary junction were pre-defined to measure the thickness and length of this structure. Linear measurements between the landmarks were performed in duplicate by two independent observers over 14 days. The data was evaluated using Netfabb Basic Studio (Netfabb Company, Parsberg, Germany). An analysis of variance (ANOVA) studied the influence of certain factors (side, observer, and repetition) on the accuracy of the measurements. Results . The mean value of all the valid measurements was 2.76 mm for thickness and 16.71 mm for the length of the pterygomaxillary junction. ANOVA showed no inter-observer bias. None of the observers reported statistically significantly higher or lower values than the other observer (p > 0.05). The intra-observer reproducibility was better than the inter-observer reproducibility of the measurements. The intraand inter-observer reproducibility analyzed for log-transformed absolute values of differences between the measurements was very good (< 0.5 mm mean difference for linear values reconstructed from the log). The results were from a relatively large population and offered useful and reproducible measurements using open source software during the planning of orthognathic procedures. Conclusion . The results confirmed the reproducibility of the measurements. This method may be used during the diagnostics and planning of Le Fort I osteotomy. We also propose further evaluation of open-source software programs. Their comparison may help standardize the planning of orthognathic procedures.
机译：抽象背景。上颌翼异常是Le Fort I截骨术中最危险的部分。在3D成像软件中对患者的解剖结构进行术前评估可能有助于选择合适的手术方法，并最大程度地降低手术风险。目标。这项研究的目的是评估使用开源软件在上颌骨交界处进行的线性测量的可重复性。材料与方法 。研究人群包括101位出于与本研究无关的原因而接受CBCT检查的患者。预定义翼上交界处的八个解剖标志，以测量该结构的厚度和长度。两位独立观察员在14天内重复进行了地标之间的线性测量。使用Netfabb Basic Studio（Netparb公司，德国帕斯贝格）评估数据。方差分析（ANOVA）研究了某些因素（侧面，观察者和重复）对测量准确性的影响。结果。所有有效测量的平均值为for上颌交界处的厚度为2.76 mm，长度为16.71 mm。方差分析显示观察者间无偏差。没有一个观察者在统计学上报告比另一个观察者高或低的值（p> 0.05）。观察者间的可重复性优于测量值的观察者间的可重复性。对于两次测量之间的对数转换后的绝对值，观察者之间和观察者之间的再现性进行了很好的分析（对于从对数重构的线性值，平均差<0.5 mm）。结果来自相对较大的人群，并在计划正颌手术的过程中使用开源软件提供了有用且可重复的测量结果。结论。结果证实了测量的可重复性。此方法可在Le Fort I截骨术的诊断和计划过程中使用。我们还建议对开源软件程序进行进一步评估。他们的比较可能有助于标准化正颌手术的计划。

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