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Prog Orthod. 2014 Dec 23;15:69. doi: 10.1186/s40510-014-0069-2.

Comparison of in vivo 3D cone-beam computed tomography tooth volume measurement protocols.

Author information

1
Department of Dentistry, University of Alberta, Edmonton Clinic Health Academy, 5th Floor, 11405 - 87 Avenue NW, Edmonton T6G 1C9, Alberta, Canada. manuel@ualberta.ca.

Abstract

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).

PMID:
25534123
PMCID:
PMC4274349
DOI:
10.1186/s40510-014-0069-2
[Indexed for MEDLINE]
Free PMC Article

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