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. 2016;45(1):20150162.
doi: 10.1259/dmfr.20150162. Epub 2015 Oct 28.

Cervical vertebrae maturation index estimates on cone beam CT: 3D reconstructions vs sagittal sections

Marco A E Bonfim  1 , André L F Costa  1 , Acácio Fuziy  1 , Michel E L Ximenez  2 , Flávio A Cotrim-Ferreira  3 , Rívea I Ferreira-Santos  4
Affiliations

Cervical vertebrae maturation index estimates on cone beam CT: 3D reconstructions vs sagittal sections

Marco A E Bonfim et al. Dentomaxillofac Radiol. 2016.

Abstract

Objectives: The aim of this study was to evaluate the performance of CBCT three-dimensional (3D) reconstructions and sagittal sections for estimates of cervical vertebrae maturation index (CVMI).

Methods: The sample consisted of 72 CBCT examinations from patients aged 8-16 years (45 females and 27 males) selected from the archives of two private clinics. Two calibrated observers (kappa scores: ≥0.901) interpreted the CBCT settings twice. Intra- and interobserver agreement for both imaging exhibition modes was analyzed by kappa statistics, which was also used to analyze the agreement between 3D reconstructions and sagittal sections. Correlations between cervical vertebrae maturation estimates and chronological age, as well as between the assessments by 3D reconstructions and sagittal sections, were analyzed using gamma Goodman-Kruskal coefficients (α = 0.05).

Results: The kappa scores evidenced almost perfect agreement between the first and second assessments of the cervical vertebrae by 3D reconstructions (0.933-0.983) and sagittal sections (0.983-1.000). Similarly, the agreement between 3D reconstructions and sagittal sections was almost perfect (kappa index: 0.983). In most divergent cases, the difference between 3D reconstructions and sagittal sections was one stage of CVMI. Strongly positive correlations (>0.8, p < 0.001) were found not only between chronological age and CVMI but also between the estimates by 3D reconstructions and sagittal sections (p < 0.001).

Conclusions: Although CBCT imaging must not be used exclusively for this purpose, it may be suitable for skeletal maturity assessments.

Keywords: Bone development; Orthodontics; biological indicators; cone beam computed tomography.

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Figures

Figure 1
Figure 1
Cervical vertebrae maturation stages on CBCT sagittal slices (left) and three-dimensional reconstructions (right); Part 1.
Figure 2
Figure 2
Cervical vertebrae maturation stages on CBCT sagittal slices (left) and three-dimensional reconstructions (right); Part 2.
Figure 3
Figure 3
Correlation between cervical vertebrae maturation stages [as seen on CBCT three-dimensional (3D) reconstructions and sagittal sections] and chronological age for the total sample (n = 72). 2D, two dimensions.
Figure 4
Figure 4
Correlation between cervical vertebrae maturation stages as seen on CBCT three-dimensional (3D) reconstructions and chronological age for female (n = 45) and male (n = 27) groups.
Figure 5
Figure 5
Correlation between cervical vertebrae maturation stages as seen on CBCT sagittal sections and chronological age for female (n = 45) and male (n = 27) groups. 2D, two dimensions.
Figure 6
Figure 6
Correlation between cervical vertebrae maturation stages as seen on CBCT three-dimensional (3D) reconstructions and sagittal sections for the total sample (N = 72). 2D, two dimensions.
See this image and copyright information in PMC

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