TY - JOUR
T1 - Normal variation of mandibular asymmetry in children
AU - Vespasiano, Valeria
AU - Klop, Cornelis
AU - Mulder, Catharina S.
AU - Koolstra, Jan H.
AU - Lobé, Nicolaas H. J.
AU - Beenen, Ludo. F. M.
AU - Nolte, Jitske W.
AU - Becking, Alfred G.
N1 - Funding Information: Our thanks go to L.H.E. Karssemakers for his help with the set-up of the study, and to Dr. N. Su for his aid with the statistical analysis. Publisher Copyright: © 2023 The Authors. Orthodontics & Craniofacial Research published by John Wiley & Sons Ltd.
PY - 2023/8
Y1 - 2023/8
N2 - Objective: To explore the normal variation of asymmetry in mandibles of children in the age group of 1 to 12 years. Materials and Methods: The study group consisted of 92 cadaveric mandibles of children with a dental age of 1 to 12 years old in possession of ACTA (Academic Centre for Dentistry Amsterdam), Faculty of Dentistry, the Netherlands. 3D models of the mandibles were obtained from CT-scans and hemimandibular volumes of all mandibles were calculated. The condylar height, ramus height, mandibular body length and the gonial angle were bilaterally determined using a novel landmark-based method, and the degree of asymmetry was calculated. Results: No relationship was found between dental age and asymmetry of the studied parameters (P <.05). The highest degree of asymmetry was found in the ramus height, whereas the gonial angle presented the lowest degree of asymmetry. A positive correlation was found between the asymmetry of the hemimandibular volume vs the height of the ramus (P <.05) and the length of the mandibular body (P <.05). An inverse correlation was found between the asymmetry of the ramus height vs the condylar height (P <.05), mandibular body length (P <.05) and gonial angle (P <.05). Conclusions: Mandibular asymmetries in children did occur (9.8% of the included mandibles presented with a relevant overall asymmetry of ≥3%) and were unrelated to age. The different segments of the mandible seem to compensate for each other, in order to maintain a functional equilibrium.
AB - Objective: To explore the normal variation of asymmetry in mandibles of children in the age group of 1 to 12 years. Materials and Methods: The study group consisted of 92 cadaveric mandibles of children with a dental age of 1 to 12 years old in possession of ACTA (Academic Centre for Dentistry Amsterdam), Faculty of Dentistry, the Netherlands. 3D models of the mandibles were obtained from CT-scans and hemimandibular volumes of all mandibles were calculated. The condylar height, ramus height, mandibular body length and the gonial angle were bilaterally determined using a novel landmark-based method, and the degree of asymmetry was calculated. Results: No relationship was found between dental age and asymmetry of the studied parameters (P <.05). The highest degree of asymmetry was found in the ramus height, whereas the gonial angle presented the lowest degree of asymmetry. A positive correlation was found between the asymmetry of the hemimandibular volume vs the height of the ramus (P <.05) and the length of the mandibular body (P <.05). An inverse correlation was found between the asymmetry of the ramus height vs the condylar height (P <.05), mandibular body length (P <.05) and gonial angle (P <.05). Conclusions: Mandibular asymmetries in children did occur (9.8% of the included mandibles presented with a relevant overall asymmetry of ≥3%) and were unrelated to age. The different segments of the mandible seem to compensate for each other, in order to maintain a functional equilibrium.
KW - asymmetry
KW - cephalometry
KW - children
KW - computed tomography
KW - mandible
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85149809538&origin=inward
UR - https://www.ncbi.nlm.nih.gov/pubmed/36760175
UR - http://www.scopus.com/inward/record.url?scp=85149809538&partnerID=8YFLogxK
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U2 - https://doi.org/10.1111/ocr.12639
DO - https://doi.org/10.1111/ocr.12639
M3 - Article
C2 - 36760175
SN - 1601-6335
VL - 26
SP - 524
EP - 530
JO - Orthodontics and Craniofacial Research
JF - Orthodontics and Craniofacial Research
IS - 3
ER -