Department of Oral Anatomy, Dental Research Institute and School of Dentistry, Seoul National University, Korea.
Eur J Orthod. 2013 Dec;35(6):832-40. doi: 10.1093/ejo/cjs104. Epub 2013 Jan 12.
The understanding of palatine vault growth in normal subjects is important to orthodontists. The aim of this study was to evaluate three dimensional (3D) longitudinal changes in the palatal vault from 6 to 14 years of age. Complete dental stone casts were biennially prepared for 50 subjects (25 girls and 25 boys) followed up from 6 to 14 years of age. Virtual casts were constructed using 3D laser scanning and reconstruction software. The reference gingival plane was constructed. The palatal heights were measured from a total of 12 quadrisectional points between the most gingival points of the palatal dentogingival junctions from the canine to the first molar. In addition, the palatal heights were measured from a total of 12 lateral and medial endpoints of the palatine rugae. The measurement changes over time were analyzed using a mixed-effect analysis. There were significant annual increases in all of the variables related to palatal height. However, the individual random variability at baseline was quite large. There was no significant sexual dimorphism in the linear measurements or in the annual increases as fixed effects in the model. During the observation period, increases in palatal vault height were significant in all regions. The growth pattern seemed to differ between genders even though it was not significant. More elaborate methodology is necessary to gain a better understanding of 3D palatal growth.
了解正常腭穹窿的生长对于正畸医生非常重要。本研究旨在评估从 6 岁到 14 岁期间腭穹窿的三维（3D）纵向变化。对 50 名受试者（25 名女孩和 25 名男孩）进行了为期两年的连续随访，从 6 岁到 14 岁，每两年制备一次完整的牙石膏模型。使用三维激光扫描和重建软件构建虚拟模型。构建参考龈平面。从犬齿到第一磨牙的腭牙-龈交界处最牙龈点之间的总共 12 个四分点测量腭高。此外，还从总共 12 个腭嵴的外侧和内侧端点测量了腭高。使用混合效应分析分析随时间的测量变化。与腭高相关的所有变量均呈显著的年度增长。然而，基线时个体随机变异性相当大。在模型中，线性测量值或年度增长率均无显著的性别二态性。在观察期间，所有区域的腭穹窿高度均显著增加。尽管性别之间的生长模式差异没有统计学意义，但似乎存在差异。需要更精细的方法来更好地理解 3D 腭部生长。
