Vertical growth-related changes in the positions of palatal rugae and maxillary incisors
Vertical growth-related changes in the positions of palatal rugae and maxillary incisors
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DOI：
10.1016/j.ajodo.2007.07.009
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发表时间：
2008-01-01
影响因子：
3
通讯作者：
Kiliaridis, Stavros
中科院分区：
文献类型：
--
作者：
Christou, Panagiotis;Kiliaridis, Stavros
简介：通过 3 维扫描，可以将 1 个数字牙模的图像叠加到另一个数字牙模的图像上，以观察生长或治疗变化；然而，这需要稳定的参考。腭皱被认为是检测模型咬合平面上牙齿变化的可靠点，但垂直平面上的情况也是如此吗？我们的目的是评估腭皱在垂直方向上的长期稳定性，将其与可能的上颌切牙术后运动联系起来，并验证它们作为评估纵向牙齿变化的参考。方法：使用 10 名成人和 13 名青少年的四年纵向头颅侧位片和牙模。每个模型的中腭轮廓和对应于每个皱褶的标记都叠加在头颅照片的上腭上。测量观察期间相对于腭平面的皱褶位置的变化。结果：第一条皱纹（最接近门牙）的垂直变化较大，第二条皱纹较小，第三条皱纹（距门牙最远）的垂直变化更小。青少年的皱襞位置垂直变化比成人更大。各组间前后位变化无统计学差异。上颌中切牙和第一皱褶的垂直位移与受试者下前面部高度的增加成比例。结论：我们在 4 年的观察中发现青少年和成人的上颌切牙和皱褶存在垂直位移。第三齿距门牙最远，主要在生长变化不太明显时可以作为评估牙齿纵向变化的可靠参考。
Introduction: With 3-dimensional scanning, the image of 1 digital dental cast can be superimposed on another to observe growth or treatment changes; however, this requires stable references. The palatal rugae were considered reliable points for detecting dental changes on the cast's occlusal plane, but is this the case in the vertical plane? Our aims were to assess the long-term stability of the palatal rugae in the vertical dimension, relate them to possible maxillary incisor posteruptive movements, and validate them as references for the evaluation of longitudinal dental changes. Methods: Four-year longitudinal lateral cephalograms and dental casts of 10 adults and 13 adolescents were used. The median palatal contour of each cast and marks corresponding to each ruga were superimposed on the palate of the cephalograms. Changes in rugae positions during the observation period were measured with respect to the palatal plane. Results: Vertical changes were greater for the first rugae (closest to the incisors), less for the second, and even less for the third (farthest from the incisors). The adolescents showed greater vertical changes in rugae position than the adults. There were no statistically significant differences in the anteroposterior changes between the groups. The maxillary central incisor and the first ruga had vertical displacements proportional to the increase of the subject's lower anterior facial height. Conclusions: We found vertical displacement of the maxillary incisor and the rugae during the 4 years of observation in adolescents and adults. The third ruga, the farthest from the incisors, can be used as a reliable reference to assess longitudinal dental changes mainly when growth changes are less prominent.