通过三种不同体积计算方法进行牙髓体积重建的可靠性和可重复性。
Reliability and repeatability of pulp volume reconstruction through three different volume calculations.
作者信息
Marroquin Penaloza T Y, Karkhanis S, Kvaal S I, Vasudavan S, Castelblanco E, Kruger E, Tennant M
机构信息
School of Anatomy, Physiology and Human Biology University of Western Australia, Crawley, Australia.
Faculty of Dentistry, Institute of Clinical Dentistry, Oslo, Norway.
出版信息
J Forensic Odontostomatol. 2016 Dec 1;34(2):35-46.
OBJECTIVE
To test the variability of the volume measurements when different segmentation methods are applied in pulp volume reconstruction.
MATERIALS AND METHODS
Osirix® and ITK-SNAP software were used. Different segmentation methods (Part A) and volume approaches (Part B) were tested in a sample of 21 dental CBCT's from upper canines. Different combinations of the data set were also tested on one lower molar and one upper canine (Part C) to determine the variability of the results when automatic segmentation is performed.
RESULTS
Although the obtained results show correlation among them(r > 0.75), there is no evidence that these methods are sensitive enough to detect small volume changes in structures such as the dental pulp canal (Part A and Part B). Automatic segmentation is highly susceptible to be affected by small variations in the setting parameters (Part C).
CONCLUSIONS
Although the volumetric reconstruction and pulp/tooth volume ratio has not shown better results than methods based on dental radiographs, it is worth to persevere with the research in this area with new development in imaging techniques.
目的
测试在牙髓体积重建中应用不同分割方法时体积测量的可变性。
材料与方法
使用了Osirix®和ITK-SNAP软件。在21例上颌尖牙的牙科锥形束CT样本中测试了不同的分割方法（A部分）和体积测量方法（B部分）。还在一颗下颌磨牙和一颗上颌尖牙上测试了数据集的不同组合（C部分），以确定进行自动分割时结果的可变性。
结果
尽管所获得的结果显示它们之间存在相关性（r>0.75），但没有证据表明这些方法足够灵敏以检测牙髓管等结构中的小体积变化（A部分和B部分）。自动分割极易受到设置参数微小变化的影响（C部分）。
结论
尽管体积重建和牙髓/牙齿体积比并未显示出比基于牙科X线片的方法更好的结果，但随着成像技术的新发展，在该领域坚持研究是值得的。
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