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学科主题: 口腔医学
题名:
The Validity of In Vivo Tooth Volume Determinations From Cone-Beam Computed Tomography
作者: Liu, Yi2; Olszewski, Raphael3; Alexandroni, Emanuel Stefan4; Enciso, Reyes1; Xu, Tianmin2; Mah, James K.1
关键词: Tooth volume ; Cone-beam CT ; Segmentation ; Radiographic ; Orthodontic
刊名: ANGLE ORTHODONTIST
发表日期: 2010
DOI: 10.2319/121608-639.1
卷: 80, 期:1, 页:160-166
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Dentistry, Oral Surgery & Medicine
研究领域[WOS]: Dentistry, Oral Surgery & Medicine
关键词[WOS]: ACCURACY ; CT ; BONE ; QUALITY
英文摘要:

Objective: To determine the accuracy of volumetric analysis of teeth in vivo using cone-beam computed tomography (CBCT).

Materials and Methods: The physical volume (Vw) of 24 bicuspids extracted for orthodontic purposes (16 were imaged with the I-CAT and 8 with the CB MercuRay) were determined using the water displacement technique. Corresponding pretreatment CBCT image data were uploaded into Amira 4.0 for segmentation and radiographic volume (Va). All measurements were performed twice by two observers. The statistical difference between Vw and Va was assessed using a paired Hest. The intraobserver and interobserver reliability were determined by calculating Pearson correlation coefficients and intraclass correlation coefficients.

Results: The overall mean Vw of teeth specimens was 0.553 +/- 0.082 cm(3), while the overall mean Va was 0.548 +/- 0.079 cm(3) (0.529 +/- 0.078 cm(3) for observer 1 and 0.567 +/- 0.085 cm(3) for observer 2). There were statistically significant differences between Va and Vw (P < .05). Between observer 1 and observer 2, Va measurements were statistically significantly different (P < .05). The interobserver and intraobserver correlation coefficient for Vw was high. Lastly, surface smoothing reduced the volume by 3% to 12%.

Conclusions: In vivo determination of tooth volumes from CBCT data is feasible. The measurements slightly deviate from the physical volumes within -4% to 7%. Smoothing operations reduce volume measurements. Currently, no requirements for accuracy of volumetric determinations of tooth volume have been established. (Angle Orthod. 2010;80:160-166.)

语种: 英语
WOS记录号: WOS:000274510000024
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/66281
Appears in Collections:北京大学口腔医学院_牙周科_期刊论文

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作者单位: 1.Univ So Calif, Sch Dent, Los Angeles, CA 90089 USA
2.Peking Univ, Dept Orthodont, Sch Stomatol, Beijing 100871, Peoples R China
3.Univ Catholique Louvain, Dept Oral & Maxillofacial Surg, Clin Univ St Luc, B-1200 Brussels, Belgium
4.Univ So Calif, Sch Dent, Div Craniofacial Sci & Therapeut, Los Angeles, CA 90089 USA

Recommended Citation:
Liu, Yi,Olszewski, Raphael,Alexandroni, Emanuel Stefan,et al. The Validity of In Vivo Tooth Volume Determinations From Cone-Beam Computed Tomography[J]. ANGLE ORTHODONTIST,2010,80(1):160-166.
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