| Autor: |
Maciejewska-Turek, Aleksandra, Bilinska, Malgorzata, Wellens, Hans L L, Fudalej, Piotr S |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Zdroj: |
Maciejewska-Turek, A, Bilinska, M, Wellens, H L L & Fudalej, P S 2021, ' Craniofacial Growth from Pre-to Post-Adolescence in Humans : Abstracts of Houston Oral and Poster Presentations and Scientific Posters ', European Journal of Orthodontics, vol. 43, no. 5, 146, pp. e81 . https://doi.org/10.1093/ejo/cjab064 |
| DOI: |
10.1093/ejo/cjab064 |
| Popis: |
AIM: Craniofacial growth demonstrates significant variation and is difficult to predict. The aim of the presentinvestigation was twofold: 1) to assess the association (covariation) between craniofacial shape pre- andpost-adolescence and 2) to evaluate if pre-adolescent craniofacial shape is related (covaries) with growthmagnitude and direction.SUBJECTS AND METHOD: One hundred and fifty subjects (86 males, 64 females) untreated orthodonticallywere selected from the AAOF Craniofacial Growth Legacy Collection. Each subject had cephalograms takenbefore 9 (pre-adolescent stage) and after 15 years of age (post-adolescent). Fourteen curves comprising 123points (10 fixed and 113 sliding semi-landmarks) comprehensively covering the craniofacial skeleton weredigitally traced on each cephalogram. Procrustes alignment, principal component analysis, two-block partialleast squares (2B-PLS) analysis, and regression analysis were done after sliding the semi-landmarks tominimize bending energy.RESULTS: The first 16 principal components (PCs) were non-trivial and explained 85.2 per cent of total shapevariability in the sample. PC1 depicted mainly variability in the vertical direction, PC2 represented mostlyvariability in the saddle angle and in the antero-posterior position of the mandible, and PC3 depictedprimarily variability of the mandibular shape (steep versus flat mandibular plane). The covariation betweenpre- and post-adolescent facial shape was statistically significant, both in the pooled sample (RV coefficient= 0.604) and in boys (RV = 0.639) and girls (RV = 0.629). The pre-adolescent shape was weakly associatedwith the magnitude of facial change - 2Block-PLS analysis demonstrated that blocks 1 and 2 wereindependent (P = 0.118, RV = 0.035); on the other hand, regression analysis showed that gender was thestrongest predictor of the magnitude of shape change (P = 0.001, r2 = 0.108) followed by PC4 (P = 0.015, r2= 0.039) and PC7 (P = 0.018, r2 = 0.024).CONCLUSIONS: The pre-adolescent shape of the craniofacial complex explained approximately 60 per centof the post-adolescent shape of the craniofacial complex; however, the relationship between preadolescentshape of the craniofacial complex and magnitude of its change was weak. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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