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Three-dimensional longitudinal changes of maxilla and mandible morphology during the predental period
Pubblication date: 06/2017
Authors: T. Kihara*, Y. Kaihara**, S. Iwamae***, N. Niizato****, S. Gion*, T. Taji*, K. Kozai****, H. Nikawa*
Institution: *Department of Oral Biology and Engineering, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
**Department of Pediatric Dentistry,
Hiroshima University Hospital, Hiroshima, Japan
***Satoko Dental Clinic, Saitama, Japan
****Department of Paediatric Dentistry, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
Publication: European Journal of Paediatic Dentistry
Title: Three-dimensional longitudinal changes of maxilla and mandible morphology during the predental period
Abstract: Aim The purpose of this study was to longitudinally analyse the morphology of maxilla and mandible over time in infants using a three-dimensional (3D) surface scanner.
Materials and methods Seventeen Japanese full-term infants participated in the study. Dental plaster models were fabricated every 3 months from 1 month of age to 12 months. The plaster models were scanned using the 3D surface scanner to create 3D models. The arch width, arch length, arch angle, palatal depth and palatal area of the 3D models were analysed.
Results The arch width and length of maxilla and mandible increased as the arch angle decreased. The arch width and length of the maxilla were greater than those of the mandible. The total alveolar ridge morphology increased in size in the occlusal view, with marked growth in the sagittal direction. The palatal depth remained virtually unchanged although the palatal area increased as a result of buccal growth of the alveolar ridge.
Conclusions The morphological growth pattern of the maxilla and mandible in infants can be evaluated quantitatively using 3D analysis. Knowledge about the healthy development of children and their orofacial growth patterns during the predental period can be applied as an index for diagnostic criteria.