Evaluation of 3D-printed oval root canal preparation by small field-of-view cone beam CT and computer-aided technique

Wang Yiwei; Xia Wenjun; Tang Zisheng; Bian Xiaohe; QI Zhengna; Zhan Lingnv; Zou Yan; Lin Haoyi; Dong Minjun; Zhu Ling

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Evaluation of 3D-printed oval root canal preparation by small field-of-view cone beam CT and computer-aided technique

Author: WANG Yiwei ^{1
,

2
,

3
,

4} ; XIA Wenjun ^{1
,

2
,

3
,

4} ; TANG Zisheng ^{1
,

2
,

3
,

4} ; BIAN Xiaohe ^{1
,

2
,

3
,

4} ; QI Zhengna ^{1
,

2
,

3
,

4} ; ZHAN Lingnv ^{1
,

2
,

3
,

4} ; ZOU Yan ^{1
,

2
,

3
,

4} ; LIN Haoyi ^{2
,

3
,

4
,

5} ; DONG Minjun ^{2
,

3
,

4
,

5} ; ZHU Ling ^{2
,

3
,

4
,

5}
Author Information

1. Department of Endodontics, Ninth People'
2. s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai Key Laboratory of Stomatology &
3. Shanghai Research Institute of Stomatology
4. National Clinical Research Center of Stomatology
5. Department of Oral Radiology, Ninth People'
Publication Type:Journal Article
Keywords: computer-aided technologies; CBCT; 3D printing; root canal preparation; oval root canal; root canal cleanliness; root canal deviation
From: Journal of Prevention and Treatment for Stomatological Diseases 2020;28(11):710-713
CountryChina
Language:Chinese
Abstract: Objective: To evaluate the effect of 3D-printed oval root canal preparation by using small field-of-view cone beam CT (CBCT) combined with computer-aided technologies.
Methods:An extracted tooth with a suitable single oval canal was selected by small field-of-view CBCT scanning. Three-dimensional (3D)-printed resin teeth were obtained based on the CBCT data after data conversion and processing. 50 general dentists were selected to prepare the oval root canal of the resin teeth with X-Gold rotary Ni-Ti instruments. Small field-of-view CBCT was applied to scan the oval root canals before and after preparation. Then, computer-aided technologies were used to calculate and compare these CBCT data, analyzing the effects of oval root canal cleaning as well as the root canal deviation by 3D reconstruction and rendering of the images.
Results :Among the 50 cases, the mean unprepared area of the oval root canal wall was（56.20 ± 11.91）% and the mean maximum deviation distance of the root canal was（0.140 ± 0.041）mm. There was no correlation between root canal cleanliness and deviation (r=0.18, P=0.212).
Conclusion : Combined with small field-of-view CBCT and computer-aided technology, we can effectively quantitatively evaluate the root canal preparation effect.
Full text:运用小视野CBCT及计算机辅助技术对3D打印椭圆形根管的预备效果评价.pdf