期刊
PROGRESS IN ORTHODONTICS
卷 15, 期 -, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1186/s40510-014-0069-2
关键词
Cone-beam computed tomography; Tooth; Imaging; Three-dimensional
Background: The objective of this study is to analyze a set of previously developed and proposed image segmentation protocols for precision in both intra-and inter-rater reliability for in vivo tooth volume measurements using cone-beam computed tomography (CBCT) images. Methods: Six 3D volume segmentation procedures were proposed and tested for intra-and inter-rater reliability to quantify maxillary first molar volumes. Ten randomly selected maxillary first molars were measured in vivo in random order three times with 10 days separation between measurements. Intra-and inter-rater agreement for all segmentation procedures was attained using intra-class correlation coefficient (ICC). Results: The highest precision was for automated thresholding with manual refinements. Conclusions: A tooth volume measurement protocol for CBCT images employing automated segmentation with manual human refinement on a 2D slice-by-slice basis in all three planes of space possessed excellent intra-and inter-rater reliability. Three-dimensional volume measurements of the entire tooth structure are more precise than 3D volume measurements of only the dental roots apical to the cemento-enamel junction (CEJ).
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