生长期上颌拱三维纵向变化的评估。
Three-dimensional longitudinal evaluation of palatal vault changes in growing subjects.
机构信息
Department of Orthodontics and Jaw Orthopaedics, Medical Faculty, University of Ljubljana, Ljubljana, Slovania.
出版信息
Angle Orthod. 2012 Jul;82(4):632-6. doi: 10.2319/070111-426.1. Epub 2011 Oct 19.
OBJECTIVE
To evaluate palatal vault change in children and to assess the reliability of two palatal parameters in assessing growth modifications.
SUBJECTS AND METHODS
A group of 26 healthy white children aged 5.3 ± 0.3 years (15 boys, 11 girls) were randomly selected. Impressions of the upper dental arches were obtained at baseline and at 12, 18, and 30 months follow-up. Three-dimensional digital images of study casts were obtained using a laser scanning device. Palatal surface area and palatal volume were measured on the digital study casts at each time point. Effect size (ES) coefficients were calculated for both parameters as indices of diagnostic reliability in individual subjects when at least equal to 1.0.
RESULTS
Significant increases in palatal surface area and volume were seen over the observation period (P < .001). ES coefficients for palatal surface area were greater than those for palatal volume. However, even for the former parameter, only the value taken at 30 months was above the threshold.
CONCLUSIONS
Growth of the palatal vault was significant during the observation period, which coincides with primary and mixed dentition stages. Palatal surface area appears to be more reliable than palatal volume in assessment of growth modifications in individual subjects.
目的
评估儿童腭穹窿的变化，并评估两个腭参数在评估生长改建中的可靠性。
对象与方法
随机选择了一组 26 名健康的白种儿童，年龄为 5.3±0.3 岁（男 15 名，女 11 名）。在基线以及 12、18 和 30 个月随访时，获得了上牙弓的印模。使用激光扫描设备获得研究模型的三维数字图像。在每个时间点，在数字研究模型上测量腭表面面积和腭容积。当至少等于 1.0 时，计算两个参数的效应大小（ES）系数，作为个体受试者诊断可靠性的指标。
结果
在观察期间，腭表面面积和容积均显著增加（P<.001）。腭表面面积的 ES 系数大于腭容积的 ES 系数。然而，即使是在前一个参数中，也只有 30 个月时的值超过了阈值。
结论
腭穹窿在观察期间生长显著，这与乳牙期和混合牙列期相吻合。在评估个体受试者的生长改建时，腭表面面积似乎比腭容积更可靠。
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