Sagittal and Vertical Growth of the Maxillo–Mandibular Complex in Untreated Children: A Longitudinal Study on Lateral Cephalograms Derived from Cone Beam Computed Tomography

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Departmental Papers (Dental)
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CBCT
Longitudinal study
Sagittal growth
Untreated
Vertical growth
Cephalometry
Cone-Beam Computed Tomography
Female
Humans
Longitudinal Studies
Male
Mandible
3D imaging
Cephalograms
Cone-beam computed tomography
Core lines
Longitudinal study
Plane angles
Sagittal growth
Untreated
Vertical growth
cephalometry
cone beam computed tomography
diagnostic imaging
female
human
longitudinal study
male
mandible
Dentistry
Orthodontics and Orthodontology
Pediatric Dentistry and Pedodontics
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Yi, Leah
Jeon, Hyeran Helen
Li, Chenshuang
Boucher, Normand
Chung, Chun-Hsi
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Abstract

The aim of this longitudinal study was to evaluate the sagittal and vertical growth of the maxillo–mandibular complex in untreated children using orthogonal lateral cephalograms com-pressed from cone beam computed tomography (CBCT). Two sets of scans, on 12 males (mean 8.75 years at T1, and 11.52 years at T2) and 18 females (mean 9.09 years at T1, and 10.80 years at T2), were analyzed using Dolphin 3D imaging. The displacements of the landmarks and rotations of both jaws relative to the cranial base were measured using the cranial base, and the maxillary and mandibular core lines. From T1 to T2, relative to the cranial base, the nasion, orbitale, A-point, and B-point moved anteriorly and inferiorly. The porion moved posteriorly and inferiorly. The ANB and mandibular plane angle decreased. All but one subject had forward rotation in reference to the cranial base. The maxillary and mandibular superimpositions showed no sagittal change on the A-point and B-point. The U6 and U1 erupted at 0.94 and 1.01 mm/year (males) and 0.82 and 0.95 mm/year (females), respectively. The L6 and L1 erupted at 0.66 and 0.88 mm/year (males), and at 0.41 mm/year for both the L6 and the L1 (females), respectively. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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2021-12-02
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Sensors
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