Altay Mehmet Ali, Quereshy Faisal A, Nijhawan Sumit K, Teppa Jose F, Horan Michael P, Yıldırımyan Nelli, Baur Dale A
Department of Oral and Maxillofacial Surgery, Akdeniz University Faculty of Dentistry, Antalya, Turkey.
Department of Oral and Maxillofacial Surgery, Case Western Reserve University, Faculty of Dental Medicine, Cleveland, OH, USA.
Eur Oral Res. 2018 May;52(2):105-110. doi: 10.26650/eor.2018.478. Epub 2018 May 1.
The objective of this study was to compare the accuracy of the Cavalieri's principle and 3D reconstruction in predicting the volume of a bony defect.
Defects of the same approximate size were created on nine artificial mandibles. The actual volume of the defect on each mandible was measured by water displacement, and served as the control. Each mandible was then scanned using a CBCT and volume measurements were made for each defect using two techniques: Cavalieri's principle and 3D reconstruction. For each defect, the volume obtained by each of the two techniques was compared to the control volume using the analysis of variances (ANOVA) with p<0.05.
ANOVA between the control, 3D reconstruction and Cavalieri's principle groups showed no statistically significant differences (p=.058). When the control group was further analyzed by Dunnett's post-hoc test, the results from Cavalieri's principle were found to be statistically different than the control group (p=.035), whereas the results of 3D reconstruction technique did not reach the level of significance (p=.523).
Cavalieri's principle significantly underestimates the actual control volume, and is less accurate than the 3D reconstruction technique. The 3D reconstruction method is a reliable technique in measuring volume of bony defects.
本研究的目的是比较卡瓦列里原理和三维重建在预测骨缺损体积方面的准确性。
在九个人造下颌骨上制造大小近似的缺损。通过排水法测量每个下颌骨上缺损的实际体积，并将其作为对照。然后使用锥形束计算机断层扫描（CBCT）对每个下颌骨进行扫描，并使用两种技术对每个缺损进行体积测量：卡瓦列里原理和三维重建。对于每个缺损，使用方差分析（ANOVA）将两种技术各自获得的体积与对照体积进行比较，p<0.05。
对照组、三维重建组和卡瓦列里原理组之间的方差分析显示无统计学显著差异（p = 0.058）。当通过邓尼特事后检验对对照组进行进一步分析时，发现卡瓦列里原理的结果与对照组在统计学上有差异（p = 0.035），而三维重建技术的结果未达到显著水平（p = 0.523）。
卡瓦列里原理显著低估了实际对照体积，并且不如三维重建技术准确。三维重建方法是测量骨缺损体积的可靠技术。
