Yu Yen-Yun, Chen Hsieh, Lin Chi-Hao, Chen Chung-Ming, Oviir Tina, Chen Ssu-Kuang, Hollender Lars
Institute of Biomedical Engineering, College of Medicine and Engineering, National Taiwan University, No. 1 Sec. 4 Roosevelt Road, Taipei, Taiwan.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Feb;107(2):283-8. doi: 10.1016/j.tripleo.2008.05.047. Epub 2008 Oct 4.
Mathematical morphology and box counting were used to extract trabecular pattern and to evaluate changes of reactive bone following root canal treatment.
Periapical radiographs were digitized and processed with mathematical morphology operations known as skeletonization. The trabecular patterns resulting from this skeletonization process were further analyzed with fractal dimension (FD) analysis using the box-counting method. Two groups of regions of interest (ROI) were selected from 19 subjects for the analysis.
Seventeen patients in one group and 13 patients in the other showed decreased FD in the reactive bone region after clinically successful root canal treatment (RCT). Significant changes in FD were noted 6 months after RCT (P < .05). Kappa analysis indicated significant reproducibility between the 2 groups of ROIs.
Mathematical morphology combined with box counting showed decrease of FD in reactive bone regions after clinically successful endodontic treatment.
运用数学形态学和盒计数法提取小梁模式，并评估根管治疗后反应性骨的变化。
根尖片数字化后，采用称为骨架化的数学形态学操作进行处理。通过盒计数法进行分形维数（FD）分析，进一步分析该骨架化过程产生的小梁模式。从19名受试者中选取两组感兴趣区域（ROI）进行分析。
一组17例患者和另一组13例患者在临床根管治疗成功后，反应性骨区域的FD降低。根管治疗6个月后FD有显著变化（P < 0.05）。kappa分析表明两组ROI之间具有显著的可重复性。
数学形态学结合盒计数法显示，临床根管治疗成功后，反应性骨区域的FD降低。
